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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.
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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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