I know you also want such a special price roots blowers

The summer is hot, the weather is so dry hot, think sufficient do not go out door to be able to choose the quality is reliable, the price is appropriate roots blowers, in now look is not what difficult problem, open a browser search blowers, you want high quality special price roots blowers will be greeted, you choose. Let small make up below take you to appreciate a few, see to have conquered your heart to buy desire:
1. Roots blowerss at special price, we do not lose quality;
As the customer's demand is more and more extensive, the customer's demand for blowers quality is also more and more high, our company should meet The Times and customer demand, the introduction of foreign advanced CNC machining center, the production of higher precision blowers accessories, to meet the customer's high precision configuration requirements. Make roots blowers life longer!
2. Special price roots blowerss, we do not lose sales;
blowers sales volume, monthly sales of more than 500, we speak with strength, exported to many countries at home and abroad. HDSR, HDL, HDLH, HG roots blowers model variety, to meet the power plant, steel mills, cement plants, food factories and other needs.
3. Roots blowerss are on sale. We can't compete with international blowerss.
I don't know if you can see the picture above, but what is it? Small make up to tell you, this is our company manager ma signed a successful, export Morocco zazat 6 HDSR125MJ special price roots blowers, nameplate using Chinese, English, French and Arabic 4 languages, have you thunder? That's how international we are! Good quality is not expensive!
Every roots blowers buyers, do not want to spend more than a penny, and can also buy a satisfactory special price roots blowerss, is the purchase psychology of many consumers. We are to cater to the current situation, to create a low price roots blowers. If you want to buy roots blowers at a special price, you are OUT before you call me. Please pick up the phone and order it.

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Lubrication and maintenance of water ring vacuum pump

2BV water ring vacuum pump will produce more or less friction after use. We need to constantly lubricate it to keep it in good working condition, and maintain it for a longer time after use. If you don't know how to do maintenance, give you a detailed introduction.
Under normal working conditions, the waste grease and its dirt in bearing and accessory space shall be removed and new grease shall be added after rotating speed of 20000h or 3 years at most. The added grease shall account for 50% of the bearing free space and 65% of the bearing cover space. If the working conditions are very bad, the replacement period of the grease should be shortened accordingly.
1. If hard water is used as working fluid, it can only be used after softening treatment, or the pump can be cleaned with solution within a certain period (to avoid abrasion of impeller and pump body or jamming of impeller, dust particles entering the pump cavity with gas and working fluid shall be cleaned through the flushing port at the bottom of the pump cover; if hard water is used as working fluid, the vacuum pump shall be washed with softened or regular solvent )
2. The normal working bearing of the motor is 15 ℃ - 20 ℃ higher than the surrounding temperature, and the maximum temperature is not allowed to exceed 55 ℃ - 60 ℃.
3. Always pay attention to check the operation status of the vacuum pump, and observe whether the rotation of the shaft and bearing is stable. In case of instability or jamming, replace and repair the relevant parts immediately.
4. In case of leakage of the adopted mechanical seal, check whether the dynamic and static rings of the mechanical seal have been damaged, or whether the seal rings are aged. If any of the above conditions occur, new parts shall be replaced.
The lubrication and maintenance of 2BV water ring vacuum pump are simply introduced here. Lubrication is the condition of mechanical friction reduction. We do not come to lubricate them casually. We should carry out professional production of 2BV water ring vacuum pump manufacturers according to the actual use of the machine. If you need, please contact us.

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Differential pressure of roots vacuum pump and relief valve

What is the maximum allowable differential pressure and relief valve differential pressure for roots vacuum pumps
Roots vacuum pump is a rotary positive displacement pump. According to the different working pressure range, it is divided into low vacuum (direct exhaust atmosphere) roots pump and middle vacuum roots pump. According to the different cooling medium, the vertical exhaust air roots pump can be divided into air-cooled roots pump and (water-cooled) wet roots pump. Middle vacuum roots pump can not withstand high pressure difference, so must be equipped with the front pump to work. What is the maximum allowable differential pressure and relief valve differential pressure for roots vacuum pumps? This paper discusses the maximum allowable pressure difference and relief valve pressure difference of middle vacuum roots pump (hereinafter referred to as roots pump).
The maximum allowable pressure difference is one of the most important performance indexes of roots pump. It refers to the maximum value of the difference between outlet pressure and inlet pressure allowed without failure when the inlet pressure of roots pump is equal to or less than 1 kPa for continuous operation for 1 h. Maximum allowable pressure difference is in the maximum power consumption of the measure of roots pump and one of the important indices for trouble-free operation under high temperature, which is under the maximum power consumption test of roots pump shaft, rotor, bearing and gear strength, and the rotor, the reliability of the connection between gear and shaft, under the high temperature test whether all the parts of the roots pump clearance can guarantee the normal operation.
Roots pumps with an overflow valve can be started at the same time as the front pump and can work continuously at any inlet pressure. The overflow valve of roots pump will automatically open when the pressure difference exceeds a specified value, connecting the inlet and outlet, which can effectively prevent the overload of the pump without affecting the normal operation of the pump. Therefore, the pressure difference of the overflow valve is defined as the difference of the pressure on the upper and lower sides of the valve when the overflow valve of roots pump is opened, and the operation under this pressure difference is trouble-free for 1 h. It is important to point out that in the past there has been a misconception that the purpose of the overflow valve was simply to prevent overloading of the pump and to increase the additional power consumption. In fact, this view is one-sided, the biggest advantage of roots pump with overflow valve is to expand the operating range of the pump, it covers a wide pressure range from atmospheric pressure to 1022Pa, and can effectively reduce the vacuum system in the low vacuum pumping time (30% ~ 50%).
The maximum allowable differential pressure is only a measure and assessment of roots vacuum pump manufacturing and operation quality of an index, does not mean roots pump can be in this differential pressure for a long time to run, does not mean that must be in this differential pressure to start. And roots pump with overflow valve can be determined according to the requirements of its vacuum process flow. Roots pump with no overflow valve is suitable for medium vacuum operation due to the large maximum allowable pressure difference and can withstand a larger pressure difference in short time operation. In the thick and low vacuum, the former pump can be used to pump air through the bypass (pre-pumping) pipeline.

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Cause of shaft break of 2bv water ring vacuum pump

2bv water ring vacuum pump is a common equipment in factories. When the time is longer, the problem is much bigger than the problem. The fracture axis problem usually occurs. Many people don't understand why this is the case, so let's talk about why the device is broken.
1. The end clearance of the engine shaft of the water ring vacuum pump is too large or is severely ablated, and the engine moves forward and backward during operation.
The main bearing has been loose and worn away for too long. The break occurred in the back of the engine shaft. This is also due to the frequent radial runout of the engine shaft, resulting in the engine shaft fracture.
3. The thrust surface of the shaft is located on the main shaft. At the same time, the engine shaft also has the air compressor load. As the load on the air compressor increases, it is easy to abate or loosen the engine shaft and produce radial runout.
4. If the main bearing and connecting rod bearing are ablated for many times, the ablative supporting force of the ablative part is weakened, the radial runout of the shaft will be frequent. In addition, the stress changes after the root ablation, so the fracture occurs between the root and the arm of the shaft.
5. The gap between adjacent main bearings is too large, especially between the last two main bearings and the first two main bearings. There is a flywheel behind the engine shaft and a pulley in front of the engine shaft. When the two ends of the engine shaft are overstressed, the radial runout is frequent.
6, 2bv water ring vacuum pump shaft bending is too large or the center is different, and the main bearing clearance because of uneven elasticity, hindered the rotation of the engine shaft, plus the engine shaft front and rear load is not uniform, radial runout frequent.
7. Eventually, ablative or rolling of the main bearing will cause the rear of the engine shaft to jump too much.
During operation of 2bv water ring vacuum pump, the shaft may break suddenly. Axial fractures may occur on the surface at the time of occurrence but are actually the result of quantitative and qualitative changes that have accumulated to a certain level. So, this is ultimately a lack of routine maintenance and repair. We should do a good job and reduce the trouble.


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Small vacuum pump trouble solutions

Small vacuum pump is a kind of widely used pump equipment, it can be used to output of compressed air, can either extraction and extraction, so small vacuum pump in China's scientific research, the gas collection, chemistry, medicine, biological engineering, automatic control, environmental protection in areas such as easy to get up, work can achieve very good effect, but in small vacuum pump work, inevitably some accident will happen. Next, I will analyze the small vacuum pump failure and solutions.
Worn bearing
Wear of vacuum pump drive components is a common problem, including components such as bearing locations, bearing boxes, bearing Chambers, keyways, and threads. The traditional methods are mainly repair welding and brush plating spraying, which can cancel the application of polymer materials in repair. Processing. There is no effect of welding thermal stress, and the repair thickness is not limited. At the same time, the metal material without any concessions, can absorb the impact and vibration of the equipment, avoid the possibility of wear again, and greatly extend the service life of equipment components. Businesses save a lot of downtime and create a lot of economic value.
corrosion
Vacuum pump corrosion forms can be divided into two categories: general corrosion and local corrosion. The former occurs more evenly over the entire surface of the vacuum pump, while the latter occurs only locally. Polymer composites are used to protect the surface of the vacuum pump with an organic coating. Compared with the traditional pressure vessel welding and maintenance, the steel has the advantages of simple structure, low cost, good safety performance and good maintenance effect.
Shell crack cracking
Vacuum pumps often cause parts to break or break due to casting, machining defects, internal stress, and overload operations. Conventional repair methods are welding or "cold welding" techniques that avoid thermal stress deformation. At the same time, the material has good adhesion and comprehensive properties, such as pressure resistance and corrosion resistance, can maximize the use of various equipment components required to ensure effective production at the lowest input cost. Safe, convenient and reliable.
We should all treat these creatures with awe. For a small vacuum pump, it is also a living individual, so when problems or failures occur during work, the user will not dislike the small vacuum pump or hold a negative attitude towards the use of the small vacuum pump. How to deal with the small vacuum pump in a timely and effective manner is not only the wisdom of the workers, but also the progress of the whole small vacuum pump.


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Vacuum pump oil inspection requirements and standards

Vacuum pump oil plays an important role in the safety of vacuum system. High quality vacuum pump oil can show high oxidation resistance, good thermal stability, lubricity, sealing performance and low chemical activity. In addition, no volatile pollutants, no moisture absorption, high boiling point, low vapor pressure, long service life, renewable, these are the performance indicators to evaluate high quality vacuum pump oil.
I. performance analysis of vacuum pump oil
1. Sealing performance analysis: in order to prevent the exhaust valve from entering the atmosphere, there is a gap between the relative moving parts (rotor and stator, rotor and rotor, slot, etc.). .
2. Lubrication performance analysis: relative lubrication between moving parts to reduce wear.
3. Performance analysis: the oil circulates between the pump and the tank to dissipate heat.
4. Analysis of bearing and wrapping performance: dust particles or other abrasive particles are wrapped in oil to reduce abrasion damage.
5. Protection performance analysis: forming protective oil film to prevent water and chemical vapor condensate from corroding the internal parts of the pump.
Ii. Inspection performance required for vacuum pump oil
1. At high temperature, the saturated vapor pressure is lower and the volatile components are less.
2. Minimum water content and water absorption.
3. Must have a certain viscosity, with little change with temperature (viscosity temperature rise curve is smooth).
4. Good lubrication performance, good crack resistance under mechanical stress.
5. Corrosion resistance, oxidation resistance and stable chemical properties.
Three, vacuum pump oil test standards
Viscosity grade, kinematic viscosity, density, flash point, pour point, neutralization value, chroma, residual carbon, demulsibility, corrosion test, foam performance, oxidation stability, water-soluble acid and base test, moisture content, mechanical impurities, saturated vapor pressure, limit pressure

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What are the reasons for the poor efficiency of vacuum pump

With the rapid development of China's economy, China's vacuum pump industry has maintained the momentum of rapid growth, and achieved sustained and stable development. In its rapid development at the same time, the vacuum pump companies and users are constantly explore how can promote the vacuum pump operation, whether the vacuum pump work under normal conditions, directly affect the time volume of vacuum pump, vacuum pump working condition worsen, cause loss of pumping air, thereby affecting the back pressure unit, resulting in a decline in the summer heat loading capacity and efficiency. Here, vacuum pump manufacturers talk about the vacuum pump work efficiency is poor what are the reasons?
The main reasons for the temperature rise of the working water ring of the vacuum pump are as follows:
A. The vacuum pump working water cooler is dirty and blocked, resulting in insufficient cooling of working water;
B. High cooling water population temperature of vacuum pump working water cooler;
C. Vacuum pump maintenance vacuum pump working water cooler insufficient cooling water, resulting in the cooling effect of vacuum pump cooler decline. Because of the high temperature of the working water ring of the vacuum pump, the load capacity of the unit decreases in summer.
Vacuum pump manufacturers analyze the solutions:
(1) to increase the number of heat exchangers in the sealed cooling water system or to improve into efficient heat exchangers and increase the circulation flow of sealed cooling water, a forced circulation pump can be installed in the sealed cooling water system.
(2) the working water cooler of the vacuum pump shall be cleaned in time.
(3) lower the temperature of vacuum pump cooling water.
Through the following vacuum pump manufacturers talk about the reasons for the poor efficiency of vacuum pump, we can initially understand the factors that affect the efficiency of vacuum pump.
1. Steam pressure
Low steam pressure and pressure fluctuation have a great impact on the capacity of the vacuum pump, so the steam pressure should not be lower than the required working pressure, but the vacuum pump structure design has been finalized, too much increase in steam pressure will not increase the pumping capacity and vacuum. In addition, to ensure that the boiler supply steam pressure is stable, zui USES a boiler specifically to provide working steam for the steam jet pump, so that the steam pressure will not fluctuate, to ensure the performance of the vacuum pump is stable.
2. Circulating cooling water
If the cooling water supply is insufficient, the condenser will generate heat, the air flow will become louder, the vacuum will drop rapidly, and even the steam will return to the exhaust pipe. Condensate water plays an important role in the multistage vacuum pump, condensate water can condense the steam, the vacuum pump discharge pressure of water vapor pressure is necessary to be higher than the corresponding full steam pressure, so the temperature of condensate water is also lower than the full temperature under the pressure, in order to ensure the normal operation of the pump body.
3, the nozzle
Nozzle is an important part that affects the performance of the vacuum pump. The existing problems include: wrong nozzle, wrong nozzle, blockage, damage, corrosion and leakage. No matter what preventive measures are taken, the blockage of the nozzle is inevitable. On the one hand, when installing the steam pipe, the residual iron scrap and welding slag in the pipe will block the nozzle; On the other hand, when the vacuum pump system is out of service, the steam pipe is prone to rust, and the rust spots fall off and block the nozzle during use.
4. Use environment
Environment is mainly refers to the influence of the gas is pumped to the system of pollution, in the process of liquid steel disposal, liquid steel can emit a lot of gas, but also there will be a part of the subtle oxidation sheet jelly and other small particles drawn into a vacuum pump, these small particles can accumulate adhesion on the pump body, reduced the bleed line flow guide, extended the extraction time, decreased pump can qigong.

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Water ring vacuum pump power supply mode

Water ring vacuum pump in the use of the process, because the operation is simple, high safety performance, so the application of the field is very wide, to achieve the majority of users in the pro, about its power supply, we do not know to know it.
1, battery, is the general name of the battery, because the principle and dry battery is different, can provide greater current and power, widely used in electric vehicles, automobiles and other mobile vehicles, agricultural spraying spray, field sampling and other lack of power occasions.
2, water ring vacuum pump because the medium is "water or liquid", the proportion is larger; And the working medium of micro vacuum pump, micro air pump is "gas", the proportion is lighter; Therefore, the working current of water ring vacuum pump is generally larger than the latter, about 1~10 amperes, while the latter's working current is generally not large, from several hundred milliamps to several amps.
3, commonly used dry batteries (such as 1, 5V no. 1 battery) because of the greater internal resistance, itself provides a small current, and a large part of the voltage is consumed in the internal resistance, so the voltage drops faster, from the power, service time to consider are suitable for water supply ring vacuum pump power supply.
Water ring vacuum pump power supply is the above, in the use of the process to choose the appropriate power supply, so that it can achieve higher operating efficiency, play a greater role.
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Notes for roots fan installation

Roots blower has been widely used by various enterprises since it came into being, and plays an important role in aquaculture and sewage treatment. The following is a brief introduction of roots blower installation matters needing attention.
Roots blower is a high speed machine, it will produce slight vibration when working, in order to ensure a stable working environment of the machine, the installation must be fixed on a stable ground. First of all, you should choose a quiet and less crowded environment for installation. If installed in a crowded environment, unnecessary trouble may occur, causing burns and scalds. Therefore, for the sake of safety, you must choose a quiet environment. The base must be set aside around a very generous space, to ensure that the exhaust can be smoothly discharged, if roots fan problems, there can be enough maintenance space.
During the installation of the fan, the foundation of the ground shall be smooth and smooth, stable and reliable. There should be no cracks and impurities, if there are potholes on the ground, must be leveled. Keep the floor smooth. When the fan is configured outdoors, in order to prevent the erosion of rain, the rain-proof canopy must be set up to provide a dry and bright service environment for the fan. If the fan in more than 40 ℃ environment when using, must be placed to the exhaust fan cooling device, keep the fan a warm environment, ensure the normal operation of the work, roots blower after installation is complete to check each section of the presence of loose phenomenon, ensure that every part of the fan is to tighten, and regularly add butter to fan, maintenance and maintenance.
In summary, the installation of roots fan for your reference. In order to ensure the normal work of roots fan, must do a good job of daily maintenance and maintenance work.

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Roots vacuum pump high speed will produce what effect

The higher the speed of most mechanical equipment, the more efficient it will be, but this does not apply to all mechanical equipment. For example, roots vacuum pump once the speed is too high, not only will not have the effect of improving work efficiency, but will lead to roots pump some problems. Then why on earth roots vacuum pump equipment speed can not be too high?
1, roots vacuum pump operation of the suction and exhaust is through the action of the air valve to achieve, if the speed is too high, will lead to the action of the air valve can not keep up, easy to produce lag phenomenon, resulting in increased volume loss, but not conducive to the vacuum of roots vacuum pump to improve. At the same time will also lead to serious pump valve impact, aggravating roots pump equipment wear
2, roots vacuum pump equipment itself will shake, with the increase of speed, its vibration will increase, will have adverse effects
3, another situation is due to the high speed, in a certain pumping rate, the shorter the trip, and the filling valve, the cylinder diameter can not be too small, otherwise it will cause clearance volume increase, compression line and expansion line become shorter, is not conducive to improve the vacuum roots vacuum pump. To ensure the vacuum, roots pump equipment should use low speed, long travel
4, after the increase of speed, the balance of the roots vacuum pump of the balance channel will become not obvious, can not balance the gas in time, can not reduce the impact of clearance volume, thus affecting the vacuum
Therefore, roots vacuum pump only to keep its speed in a reasonable range, can keep its efficiency in a good state. Pay more attention to the speed problem when operating, once abnormal should be adjusted in time, to avoid the occurrence of bad conditions

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Stainless steel plant adopts high efficiency vacuum pump fog filter

High efficiency vacuum pump filter is used in stainless steel plant to realize oil mist separation
Some factories may produce some waste gas in the production process, leading to environmental pollution, will attract the attention of the relevant departments. With the development of science and technology, filters are constantly improved. Installing some filters on the machine can effectively reduce the production of waste gas. Filtering out soot and then emitting gas is not only a corporate social responsibility, but also a way to win public praise and reduce pollution public opinion. Then how to choose the oil mist filter of the stainless steel plant vacuum pump? The following dongguan filter elder brother filter for you to introduce it!
The selection of vacuum pump filters must first determine the type and components of the vacuum pump you need to apply. As we introduced today the stainless steel factory vacuum coating needs to use a good vacuum pump oil mist filter, select the correct filter type can be further filter model selection.
In a stainless steel factory in Beijing, there are dozens of 2x-70 vacuum pumps. During the process of vacuum coating, smoke is serious, a lot of oil is sprayed, and the environment is polluted and oil is wasted. Under these circumstances of trouble, after consulting, stainless steel materials factory in an old customer to understand the filter elder brother vacuum pump oil mist filter. Filter elder brother to the stainless steel material factory after a detailed understanding, for the stainless steel material factory to choose the filter elder brother produced 2X-70 oil mist filter. The 2X-70 oil mist filter is suitable for the valve type vacuum pump or the rotary vane type vacuum pump with a pumping rate of 70 l/s. The 2x-70 oil mist filter solves the environmental pollution and oil volatilization loss caused by smoke and oil injection of the vacuum pump in the stainless steel plant through efficient oil and gas separation, so as to achieve the goal of energy conservation and environmental protection.
Finally, the filter for the stainless steel plant's dozens of vacuum pumps have been installed with oil mist filters, customers no longer worry about the fume emission problem.

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Water ring vacuum pump lubrication maintenance method

1. Lubricated water ring vacuum pump
Since the vacuum pump and the motor are one, only the motor bearings need to be lubricated. Under normal operating conditions (50Hz), class B insulated motor bearings must be cleaned and added after approximately 8000 hours or one year.
2. Water ring vacuum pump maintenance
(1) frequently check whether the bolts are loose, whether the air pipe is leaking, whether the packing seal is tight, whether the packing seal is leaking, whether there is friction sound or other noise in the rotating parts. If so, please stop or repair or replace the parts.
(2) there should be no sand or debris in the water.
(3) if hard water is used as the working fluid, the water must be softened or the solvent must be used frequently to flush the pump. It is usually immersed in 10% oxalic acid for 30 minutes, or in detergent used in industrial boilers for 30 minutes to remove calcium carbonate.
(4) if the pump is not used for more than two weeks, drain the water in the pump and fill the suction inlet of the pump with 0.5l rust inhibitor or oil, and push the pump for less than 1s.
(5) if the water ring vacuum pump is used in places where it is likely to freeze at low temperature, antifreeze and corrosion resistant working fluids, such as mineral oil, should be used. Drain the pump chamber after each use.
(6) if the water ring vacuum pump does not work for a long time, please drain the water in the pump and add anti-rust fluid to protect the pump.

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Water ring vacuum pump lubrication maintenance method

1. Lubricated water ring vacuum pump
Since the vacuum pump and the motor are one, only the motor bearings need to be lubricated. Under normal operating conditions (50Hz), class B insulated motor bearings must be cleaned and added after approximately 8000 hours or one year.
2. Water ring vacuum pump maintenance
(1) frequently check whether the bolts are loose, whether the air pipe is leaking, whether the packing seal is tight, whether the packing seal is leaking, whether there is friction sound or other noise in the rotating parts. If so, please stop or repair or replace the parts.
(2) there should be no sand or debris in the water.
(3) if hard water is used as the working fluid, the water must be softened or the solvent must be used frequently to flush the pump. It is usually immersed in 10% oxalic acid for 30 minutes, or in detergent used in industrial boilers for 30 minutes to remove calcium carbonate.
(4) if the pump is not used for more than two weeks, drain the water in the pump and fill the suction inlet of the pump with 0.5l rust inhibitor or oil, and push the pump for less than 1s.
(5) if the water ring vacuum pump is used in places where it is likely to freeze at low temperature, antifreeze and corrosion resistant working fluids, such as mineral oil, should be used. Drain the pump chamber after each use.
(6) if the water ring vacuum pump does not work for a long time, please drain the water in the pump and add anti-rust fluid to protect the pump.
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The design steps of vacuum pump unit are introduced

The following by the vacuum pump unit manufacturers to introduce the vacuum pump unit design steps, with the continuous development of vacuum equipment, the emergence of a variety of new vacuum units, these models are designed in detail according to the needs of users. The design conditions for the vacuum pump unit should meet the original intention of the design, and the design step should also be professional detailed planning, to ensure the normal use of the design work.
Design conditions of vacuum pump sets known parameters of vacuum chamber: volume of vacuum chamber; Surface area of venting; Air leakage of vacuum chamber; Operating vacuum; Ultimate vacuum; Pre-pumping time and pumping time to reach the ultimate vacuum, etc. Gas source in vacuum chamber: atmosphere in vacuum chamber; Vacuum chamber surface vent; Leakage in the dynamic seal and static seal of the vacuum chamber; Shell permeating gas; The gas emitted by the treated material; The gas required for the process to be introduced. Special requirements for vacuum chamber: whether dust, metal spillage, corrosive gas, water vapor are generated during the process; Does the vacuum chamber require no oil, no vibration, etc.
Design steps of vacuum pump unit calculation of total discharge volume in vacuum chamber; Determine the effective pumping rate of the vacuum chamber; Coarse main pump and coarse pre vacuum pump; According to the requirements to select valves, traps, dust collector and other vacuum components; Draw the assembly sketch of the vacuum system and determine the size of each part. Confirm (check) calculate the parameters of the vacuum pump, if the coarse vacuum pump can not meet the requirements, the need to re-select the pump and pump, until the parameters meet the requirements; Draw assembly drawing of vacuum system; Draw part drawing and construction drawing.
The vacuum pump unit must be designed according to the specific design conditions for planning, so as to meet the requirements of users, in the selection of materials to consider the quality of good and low cost of metal, production in strict accordance with the drawings for construction, so that the products produced will be welcomed.

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How to solve root vacuum pump blockage

Roots vacuum pump once blocked not only can not operate, but also will produce more failures, thus causing great damage to roots vacuum pump equipment itself. Here are a few ways to reduce roots vacuum pump congestion:
1. Strict operation rules
Roots vacuum pump shall be started and stopped in strict accordance with the operation requirements. At startup, zero output pump is started, and nitrogen can only be charged to the pressure plate when there is a certain pressure at the outlet of roots vacuum pump. Avoid the membrane deformation caused by nitrogen filling and prevent the membrane rupture; Increase roots vacuum pump output, to be slow; When the pump is stopped, the output of roots vacuum pump should also be reduced slowly
2. Replace lubricating oil and worn parts regularly
Roots vacuum pump internal main moving parts are worm, worm gear, slider, fixed new piston and so on. The wear of these parts will directly lead to the reduction of roots vacuum pump flow or not at all, the current solution is to replace the lubricating oil, wear parts and clean the hydraulic cavity regularly
3. Strengthen the maintenance of roots vacuum pump
During the operation of roots vacuum pump, make regular inspection, especially check the lubricating oil level, pump sound, outlet pressure, nitrogen buffer tank pressure, etc. Replace the pump diaphragm and nitrogen buffer tank diaphragm regularly to effectively prevent the catalyst stop accident caused by the simultaneous damage of roots vacuum pumps
Want to reduce, avoid roots vacuum pump blockage, leave not two points: one is the correct operation of roots vacuum pump, two is to do a good job of regular inspection, maintenance work

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Instructions for cleaning and handling of vacuum pumps

This article relates to the vacuum pump cleaning field, is about the import vacuum pump cleaning processing instructions. The vacuum pump widely used in industrial production is oil-type vacuum pump, which USES transformer oil as the working fluid. Its advantage is that the vacuum degree is improved by the lower saturated vapor pressure of the oil, up to the absolute pressure of 6.7mbar. However, in the process of work, such as in the removal of the gas pollution, or in some special working conditions, the gas contained in the auxiliary agent, catalyst after cooling into the water does not dissolve in the viscous gel, attached to the blade and impeller of the vacuum pump, resulting in the vacuum drop affect the performance of the vacuum pump. Therefore, every once in a while to remove the vacuum pump blade and impeller to clean. This frequent disassembly is likely to cause vacuum pump wear and vacuum drop. Therefore, an improved cleaning method is needed to overcome the above defects, reduce the damage to the machine caused by disassembly and environmental pollution, and extend the service life of the machine.
The cleaning treatment in vacuum pump technology generally refers to the cleaning treatment of the structural materials, filling materials and vacuum parts. Removing or reducing contaminants will facilitate good vacuum, increase connection strength and air tightness, and improve product life and reliability.
Several types of vacuum pump contaminants
1. Grease: lubricants and vacuum grease contaminated during processing, installation and operation;
2. Water droplets: hand sweat during operation, saliva when blowing glass, etc.;
3. Surface oxide: surface oxide formed by long-term base dew of easily oxidized materials or placed in humid atmosphere;
4. Acid, alkali and salt substances: residual substances after cleaning, hand sweat, minerals in tap water, etc.;
Dust in the air and other organic matter.
During the use of vacuum equipment, the parts will be contaminated. This contamination is related to operating conditions and vacuum pumps. Such as vacuum drying system, often used after the evaporation of the material will be contaminated; The inner wall of the vacuum coating machine will be polluted by the evaporation material;
A single layer of monolayer gas on the exposed surface of the vacuum system is essentially an infinite source of gas, which keeps the vacuum pump at full capacity. The wavelength of visible light is about 5x10^-5cm, and the spacing between molecules in the monolayer is 10^-7cm. When assembling a vacuum system, the surface must be chemically cleaned with a liquid, and the residue of the cleaning solution must be completely negligible after evaporation and drying. In addition, the vapor pressure of the liquid used for final cleaning must be high enough so that it can evaporate and dry in a short time.
In this paper, the vacuum cleaning instructions through under the running condition of vacuum pump to adjust vacuum degree, and USES the NMP, ethanol or acetone solution for cleaning, cleaning fluid and efficient cleaning the adherent dirt inside the vacuum pump, reduce disassemble the machine damage and pollution to the environment, be used after washing passivation passivation agent in order to prolong the service life of the machine, widely used for industrial purposes.

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Water ring vacuum pump exhaust explosion prevention measures

Probably a lot of people are not familiar with the water ring vacuum pump exhaust explosion phenomenon, which is a harmful phenomenon to the operation of the equipment, so in the use of the process we should try to take measures to prevent.
A, filtering,
In order to solve this phenomenon, the water ring vacuum pump inlet pipe can be installed with a filter device to filter the dust or residual fluid, and regularly clean the filter facilities to ensure good performance of the device. At the same time, the whole water ring vacuum pump pump body maintenance, timely clean the valve plate
Second, the cold yet
As the piston of the water ring vacuum pump reciprocates in the cylinder, the pump temperature is too high, which provides the condition for material carbonization and induces the accident. In order to avoid the occurrence of this situation, before opening the pump to open the water ring vacuum pump cooling system, and to ensure that the system in and out of the pipeline free
Washing and buffering
Adding water washing and buffer tank before the water ring vacuum pump can clean up the residual fluid effectively, and also has a certain cooling effect on the mixed air
However, the following two phenomena often occur in the actual work: when the residual liquid in the tank is small, a small amount of feed liquid will be sucked into the pump body, and the material will be carbonized at high temperature; When the amount of residual liquid is large, such as not timely discharge, water ring vacuum pump may be inhaled liquid, pump flushing, resulting in greater equipment accidents
Therefore, in the production process in strict accordance with the requirements of the use of water ring vacuum pump, timely discharge of residual fluid, to avoid accidents
Iv. Blocked or unblocked exhaust pipe
This fault may lead to the mixed gas containing methanol vapor can not be discharged in time, the accumulation to a certain extent, it will be strong leakage, water ring vacuum pump explosion or even explosion.
The causes of this phenomenon are many, may be due to the design of the lack of depression, resulting in the location of the exhaust pipe is relatively low, there is water or accumulation of oil in the tube, may also be due to some human factors or natural factors, such as the water ring vacuum pump valve is not open or open insufficient, rain cover collapse led to poor exhaust
Although the water ring vacuum pump exhaust explosion can be prevented, but also need to pay special attention to the operation, you can choose some professional strong performance to operate these water ring vacuum pump equipment, in the event of problems can also be dealt with in time.

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Water ring vacuum pump suddenly shut down how to solve

Water ring vacuum pump can be widely used in the vacuum pump, etc., and use more stable, but in the use of equipment may arise suddenly stop running, if rule out conditions is a sudden power outage, so we need to check whether the equipment problems, this is not to the secondary to open, we should deal with the problem and then began to run, let's learn about the equipment suddenly shut down how to solve it.
1, the packing or seal wear, resulting in air leakage into the equipment, then need to check the packing or seal and according to the needs of the corresponding replacement, but also check whether the lubrication is normal.
2. Check whether the inlet pipeline is leaking. It is usually necessary to check the inlet line for air cavitation or air leakage.
3. Sometimes the impeller or pipeline may be blocked. It is necessary to check whether the pipeline is blocked by obstacles. If there is any blockage, it should be dealt with in time. If there is no blockage of the water ring vacuum pump, it needs to be dealt with again.
Water ring vacuum pump suddenly shut down how to solve
4. The immersion depth of the bottom valve or inlet pipe of the equipment is still not enough, so it needs to be immersed to the correct depth to continue normal operation.
5. It may be due to insufficient water absorption when pumping hot or volatile liquids. In this case, it is generally necessary to increase the suction head, if you do not know how to operate, you need to consult with the manufacturer or find a professional to deal with.
6. The suction range is too high, so please check whether the net pressure head is normal in case of this kind of problem. It may be that the inlet line is too small or too long, which will cause wear.

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What is the cause of excessive fuel consumption of roots vacuum pump

Roots vacuum pump may consume too much lubricating oil when it is in operation, so it needs to stop and repair at this time to avoid internal failure that causes great wear and tear on roots vacuum pump equipment and causes more serious consequences.
What is the cause of the excessive fuel consumption of roots vacuum pump equipment
1, the oil spill
Roots vacuum pump oil leakage failure, is generally the main cause of excessive consumption of oil, the need to find out the oil leakage and repair as soon as possible. Need to emphasize is roots vacuum pump oil leakage will lead to the machine and other places have oil, so in the maintenance as far as possible with a special cleaner clean
2. Too much oil in the valve room
Valve tube wear, piston ring and cylinder liner wear, turbocharger seal ring damage, can also lead to the roots vacuum pump excessive consumption
3. The oil temperature is too high
Roots vacuum pump should be shut down for a period of time, check the oil cooler working conditions, change new parts, the oil cooler core clean
4. Excessive oil in the engine
Should remove excess oil, find out the source of oil, engine oil should be appropriate, do not add too much lead to oil leakage
Once it is found that roots vacuum pump consumes too much oil in the operation process, it is necessary to find out the causes of the excessive oil consumption of roots vacuum pump equipment in a timely manner, deal with and solve the problem, and do related maintenance work, so as to better avoid the failure of roots vacuum pump equipment again

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Roots vacuum pump two major rust removal methods

If the maintenance of roots vacuum pump is not in place or the use method is not standardized, the anti-rust effect of the equipment will be reduced. The rusted roots vacuum pump will not only reduce its working efficiency, but also affect the service life of each part. Currently, there are two methods for removing rust of roots vacuum pump:
Artificial rust removal
Artificial derusting cost saving, insurance. You can get rid of rust with the tools you have at your disposal. You can do it by hand. As for insurance, because the roots vacuum pump cavity if the use of chemical rust remover to remove rust, pump cavity more or less will be damaged
Use rust remover to remove rust
Rust remover is very clean but can damage the cavity of roots vacuum pump
Summary, when there is rust corrosion condition, the roots vacuum pump can adopt the method of artificial cleaning or use the rust remover derusting processing, but before to rust removing the roots vacuum pump, be sure to choose according to actual situation of the roots vacuum pump is the rust of rust removal, choose a more suitable method can make the descaling effect better. And in the roots vacuum pump after the completion of rust, also to do the relevant maintenance work, in order to consolidate the maintenance of rust removal effect

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Excitation mode of water ring vacuum pump is introduced

Know people know that the water ring vacuum pump, because the vacuum pump device has the advantages of simple structure, convenient operation for a wide range of applications, if you want to be more successful using water ring vacuum pump equipment, you need to understand its structure, then we have to introduce the knowledge of water ring vacuum pump of the excitation control.
1, the water ring vacuum pump excitation circuit power on the pre-set parameters, including magnetic flux (excitation current) limit value, loss of magnetic protection action setting value, full magnetic current setting value and weak magnetic control curve to check and adjust;
2, water ring vacuum pump potential (or voltage) regulation closed-loop open simulation test. The armature terminal voltage and armature loop current are given in the simulation method, and the output limit value, excitation current and feedback loop parameters of the potential (voltage) regulator are set.
3, water ring vacuum pump excitation current (or magnetic flux) regulation closed-loop control step response dynamic characteristics adjustment. The dynamic characteristics of k should be measured and adjusted in full magnetic working area, near the starting point of weak magnetic field and weak magnetic working area respectively.
The water ring vacuum pump is equipped with an eccentric rotor with fixed blade, which throws water (liquid) to the stator wall, and water (liquid) forms a liquid ring concentric with the stator. The liquid ring and the rotor blade form a rotary vacuum pump with variable volume.
Through the above introduction, we also know that the water ring vacuum pump is now widely used, has a good development prospects, in the use is also to bring you a lot of help. Water ring vacuum pump manufacturers remind everyone, in the use of equipment is must carefully observe the running state of the equipment, once found any problems with water ring pump equipment should be timely solved, to ensure the normal operation of water ring vacuum pump equipment, and will reduce the loss.

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All kinds of vacuum pump descaling and cleaning technology

Vacuum pump is used in many areas, whether in the north or the south, whether the water is soft or hard water, there are scaling problems. When the scale is serious, the hard stone mineral will fill the vacuum pump gap, the motor will not move, until burned out, trip. Every startup is difficult.
The scale of vacuum pump is mainly related to water quality and temperature. The company has been engaged in vacuum pump scale control and descaling research for twenty years. From the beginning, I encountered the problem of vacuum pump scaling in the enterprise, and then worked hard to find a solution, and then promoted it all over the country. Along the way, I accumulated a lot of experience from theory to practice. As a technical salesperson, you don't focus on profit. They don't brag or hack or rely on relationships. By doing, by the study and thinking of the problem.
1. For large vacuum pumps, online scaling control is recommended. Because of the scale of the vacuum pump, the current will be increased by more than 10%. If you put in a very small amount of cost, you can ensure the vacuum pump operation without dirt. It is not that the water ring vacuum pump is nothing like the people who make turbine. The scaling problem of vacuum pump is not a big problem. As long as you seriously deal with it and find a professional company, it is not a problem at all. No incurable disease, because did not find the right medicine.
2. For a small single vacuum pump (for example, under 100KW power), the sealed water cannot be circulated internally. Periodic chelation cleaning is recommended. The so-called chelating cleaning is the use of only calcium and magnesium particles, not iron and copper material reaction of the chemical, in a certain concentration and time, the scale layer reaction. It just slowly enters the water as a particle, without shedding chunks. This medicine doesn't feel anything when you put your finger in it. It won't hurt your hand, and it won't corrodethe device. Don't worry. The price will not be expensive, absolutely in the enterprise think reasonable price.
3. In order to highlight the effect and reduce the cost, many products on the market add hydrochloric acid, nitric acid or sulfuric acid in the descaling agent. These products may seem obvious, but they can be deadly to your device. Any pitted spot or pit is the site of the next scaling. All equipment will not scale at first, only after rough surface, there is a crystal particle adhesion point, will form visible scale deposit. What's more, the bearing sleeve corroded, causing serious losses to the manufacturers, because these people, the mind is money, do not consider the long-term benefits.
In fact, whether large or small vacuum pump, regular safety cleaning is necessary. A clean vacuum pump not only produces the ideal vacuum, but also reduces the load and saves energy.

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How to repair the corrosion of vacuum pump unit

With the development of mechanization, the mechanical performance of vacuum pump unit has experienced the technical improvement and performance improvement from generation to generation. In today's construction activities, the use of vacuum pump unit frequency has been greatly improved. However, due to the special circumstances of different vacuum pump units, there will be some losses are inevitable operational problems. For example, in a corroded vacuum pump unit, since the vacuum pump unit is usually used in a relatively harsh working environment, it is inevitable that there will be corrosion of a vacuum pump unit, and then how to solve it, as we described in the detailed method to repair the corrosion-resistant pump unit:
1. Surface treatment:
The oxide layer is completely removed from the surface and the vacuum pump unit is cleaned with acetone.
2. Harmonic materials:
Harmonize drawing to scale and stir until the surface color of the vacuum pump unit has no color.
3. Application materials:
A thin layer of the repair material should be applied first to ensure complete coverage of the adhesive and no gaps must be left to avoid secondary corrosion. The material is then applied evenly to the surface of the repair to achieve the required thickness.

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The key problem in the design of roots vacuum pump

Roots vacuum pump is a rotary positive displacement vacuum pump, its structure is evolved from roots blower. First appeared in Germany in 1944, it was used as a mechanical booster pump to adapt to vacuum smelting system with high pumping speed in the range of 10-1000pa pressure. In the long-term practice, punnock felt that some key issues must be paid attention to in the design of roots vacuum pump to reflect good applicability and economy, so what are the key issues in the design of roots vacuum pump in Germany?
Compared with other oil-sealed mechanical pumps, roots vacuum pump has the following characteristics:
1. Large pumping speed within a wide range of pressure;
2. The rotor has good geometric symmetry, so the vibration is small and the operation is smooth. There are gaps between the rotor and between the rotor and the shell, no lubrication, small friction loss, can greatly reduce the driving power, so as to achieve a higher speed;
3. No oil seal and lubrication is needed in the pump chamber, which can reduce the pollution of oil vapor to the vacuum system;
4, no compression in the pump chamber, no exhaust valve. The structure is simple, compact and insensitive to dust and water vapor in the pumped gas.
About the roots vacuum pump design key questions, by the technical personnel to answer for you.
One, the key parts of roots pump is the rotor, and the key to the rotor is its shape line. The outer contour of the rotor cross section is the profile of the rotor. Pump work, the surface of the rotor does not contact, but the gap between the rotor to maintain a certain, so the rotor profile must be made into a conjugate curve. When selecting rotor profile in actual design, in addition to meeting the above motion requirements, the following conditions should be considered:
(1) the volume of the pump rotor utilization coefficient to as large as possible, that is, the volume of the rotor accounted for small
(2) the rotor should have good geometric symmetry to ensure smooth operation and good interchangeability
(3) ensure that the rotor has sufficient strength
(4) the rotor should be easy to process and obtain high accuracy
In order to control the clearance between the pump rotor and the pump shell, the axial and radial displacement of the bearing should be controlled within a certain range. In the design, the accuracy of the bearing should be correctly selected and the type of bearing suitable for the working conditions of the pump should be selected. Considering the influence of the rotor axial thermal expansion, the rotor shaft should have a movable end (generally the end of the gear) to allow the shaft to move axially due to the factors such as thermal expansion. The axial clearance between the rotor and the end face of the shaft can be larger. And the axial clearance between the shaft fixed end rotor and the end cover should be selected smaller.
Three, the requirements of the gear wear, smooth transmission, the clearance between the teeth should not be too large. The accuracy of gear is often selected 5~ 6 grade. In order to make the transmission smooth, low noise, commonly used helical gear. In order to make it convenient for gear assembly and rotor clearance adjustment, the gear with adjustable clearance structure can be selected and the connection between the gear and shaft is adopted.
The above is our company after years of practice experience of the roots pump should pay attention to some of the key problems in design, in fact, the applicable conditions of the roots vacuum pump is protean, design can also be varied, even under the working conditions of a unified, also can have different design, but design of applicability and economical efficiency has always been in the design of roots pump should be the pursuit of the goal.

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What is the cause of water ring vacuum pump leakage

Water ring vacuum pump is widely used in food, petroleum, chemical, pharmaceutical, metallurgical industry and electronic fields of vacuum evaporation, filtration, drying, concentration, distillation and vacuum crystallization process. Describe the water ring vacuum pump leakage classification and countermeasures:
1. Water ring vacuum pump in operation is leaking:
At this time, the water ring vacuum pump should be kept at the low and stable speed of zui, and at the same time, water should be added to the cooling system to cool down the engine. After a short time and a slow speed, the water ring vacuum pump should be driven to a nearby shelter for further elimination
2. Water ring vacuum pump shell ruptured and leaked:
According to the situation to replace the relevant parts, troubleshooting
3. Water ring vacuum pump leakage due to serious damage:
If the water ring vacuum pump damage was very severe, on the way and no repair condition, water ring vacuum pump can be directly connected to the inlet and outlet pipe, in order to make full use of the natural circulation of hot and cold water temporarily keep engine normal temperature, or use a tube as a container or bucket, it firmly in place, and then from the container two hose, smokes on the engine inlet, the other one on the outlet of the engine, the other end of the two pipes are inserted into the container, and the hose should be fixed firmly
4. Leakage due to cracks in the shell of water ring vacuum pump:
Will crack processing clean, and then use adhesive repair

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Simply say the vacuum pump filter element maintenance method

The filter element of vacuum pump has three main filtering forms in the operation of the imported vacuum pump. The filter element of vacuum pump is the filter equipment in the vacuum pump and an important working part of the filter. The filter effect is mainly determined by the performance of the filter element. In cleaning and replacement, there are a lot of people do not make a point, often wasted effort, but did not receive better results. The following contents of the import vacuum pump manufacturers for your simple vacuum pump filter maintenance method.
1. Oil filter core (used for filtering lubricating oil of imported vacuum pump to extend the service life of oil)
2. Air inlet filter element (can effectively prevent solid particles and fine ash from being sucked into the vacuum pump. Reduce mechanical wear and improve reliability of operation. It can extend the service life of the pump and protect the system components effectively.
Three, exhaust filter core (take into account exhaust resistance, dust capacity, oil and gas separation performance, the three requirements to achieve an optimal balance. Different materials are used in different internal and external positions to achieve different separation purposes.
Usage and maintenance:
First, carefully remove the spring and felt pads, and then take out the paper core.
Loosen the knob bolt to separate the filter housing from the head. Be careful not to lose the rubber seal ring and the fiber washer.
3. Use a brush to remove dust and foreign matters in the creases of the filter core, and then gently pat it flat to make the remaining dust fall, and wipe off the dust on the inner wall of the shell and the dust on the fiber mat.

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The wiring procedure of vacuum pump is introduced

After the completion of vacuum pump processing and production, it is necessary to wire the vacuum pump before the first use, which is an important work. The wiring quality will directly affect the performance of the vacuum pump. Therefore, the vacuum pump manufacturer introduced the following wiring steps.
1. When wrapping with polyester insulating tape, one half of the first circle must be pressed and wrapped in 8-12 layers. After the vacuum pump is wrapped, two layers of plastic tape should be wrapped for strength.
2. Strip the cable copper core about 30 -- 35mm long, wipe the copper wire with emery cloth, shine preferably, also strip the copper wire of the external three-core cable 30 -- 35mm, and wipe it with emery cloth.
3. Insert the copper wire stripped from the three-core cable and the external cable into each other, then tie tightly with a thin copper wire according to the figure, cut off the remaining part, and press flat with scissors to avoid sticking hands.
4. The three wire ends shall be soldered firmly with tin respectively. The surface of the welding head shall be smooth without burr and false welding.
5. After dressing, take a basin of cold water and soak the wrapped thread in water safely. After 12 hours, measure the insulation with 500V megohm meter and the insulation shall not be lower than 50megohm.
We must be careful when wiring the vacuum pump to avoid other faults, after the wiring is completed, to check it, for unqualified places, should be timely correction, so as to avoid the use of danger.

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Solution to water inlet of dry screw vacuum pump

When we use the dry screw vacuum pump, due to the operation error, will lead to the screw vacuum pump water, for this situation, we should generally solve:
Solution to water inlet of dry screw vacuum pump
1, if the dry screw vacuum pump into the water is not much and within 2 liters, stop the pump, open the oil drain valve, put the water out, then open the gas shock valve for 1 hour;
If the dry screw vacuum pump into a large amount of water, dry oil, and then add new oil, and then gas shock valve for 1 hour;
If necessary, a receiver can be installed between the treatment room of the dry screw vacuum pump and the roots vacuum pump, so that the liquid can be absorbed before entering the screw vacuum pump
2. Check the oil seal ring of the pump shaft, and replace it with a new one if the wear is serious;
Screw vacuum pump pipeline leakage or air leakage, may be installed when the nut is not tightly screwed;
If the leakage is not serious, can be in the leakage or leakage of the place daub cement, or coated with asphalt oil mixing cement slurry

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Why do water ring vacuum pumps add check valves

To introduce a water ring vacuum pump knowledge, is why to add a check valve. As follows:
The check valve is a one-way valve. When the pump stops, the vacuum of the vacuum tube is higher than the pump chamber. The gas will enter the pump chamber from the exhaust port, and the water pressure will be transferred to the vacuum tube. Water ring vacuum pump installed check valve, mainly for protection:
1. Protection system. When the pump stops, the inlet of the vacuum pump and the connection of the system are in a vacuum state. Check valves are usually installed at the pump inlet and system connection for protection.
2, to protect the vacuum pump itself, gas backflow will impact the impeller, make the pump reverse rotation, in order to protect the pump body and other equipment, generally installed in the pump outlet check valve. More and more units now install check valves to the outlet to protect the pump and the system. If the system requirements are strict, there are two additional check valves. The check valve ACTS as a check. Due to the vacuum pump after closed the containers in a vacuum state, and the vacuum pump chamber as big as the environment pressure, because of the pressure difference, when we close the vacuum pump, vacuum pump air could be back is pumped container, if we check valve in the pipeline installation, in close vacuum pump before closing the check valve, pump chamber air wouldn't fall back to be smoked container. When the pump stops, the outlet pressure is greater than the inlet pressure. In order to prevent the water in the water ring pump from being pressed back into the vacuum system, check valves are added to the inlet. Also called check valve or one-way valve.

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