Comparisons between dry screw vacuum pump and claw vacuum pump!

Dry screw vacuum pump and claw vacuum pump are both vacuum pumps, but because of the different working principles, there will be structural differences. In order to obtain the lowest possible pressure, the two pumps are divided into four stages, but the claw is separated by the pump stage through the baffle and stage, and the screw pump through the screw intersection through the stage separation, so there is a great difference between the two stages.
First of all, the differences in the use process are as follows:
1. Dry screw vacuum pump has the shortest gas passage and the same gas transfer position between different stages, which is conducive to the rapid discharge of gas outside the pump, reducing the change of gas and condensation in the pump, and facilitating the discharge of solid particles. Because of the existence of stepped zoning, the gas passage is long and curved, and the gas condensates easily and blockages the passage easily.
2. The pump body and rotor of screw vacuum pump are monolithic, which is easy to carry out anti-corrosion treatment. The step plate of claw pump is almost impossible to be surface treated, and the corrosion coating on the rotor surface is easy to be damaged during assembly.
Secondly, reliability differences:
1. Because of the existence of stepped plate, the rotor and pump shaft can not be integrated, and the rotor is installed on the shaft. In order to facilitate installation and disassembly, the fit can not be too tight, so the rolling keys and loosening operation are prone to rotor rotation. The shaft and rotor of the dry screw vacuum pump are integrally cast and moulded, which is fully integrated and has no assembly problems.
2. Claw vacuum pump has many clearances, such as the clearance between the rotor and the rotor, the clearance between the rotor and the pump body, the clearance between the rotor and the end cover and the separator, each clearance is independent. As long as there is any gap, the pump can not work properly. The screw vacuum pump only has the clearance between the exhaust end and the rotor to determine its performance. The clearance between the rotor and the rotor is interrelated, and the operation reliability is very high.
Third, sustainability differences
1. Disassembly
The disassembly of claw pump is difficult: because of the multi-stage structure, all disassemblies should be divided into multi-stage decomposition. Rotor disassembly is a real difficulty, the accuracy of each disassembly will be reduced to varying degrees. Even simple cleaning requires disassembly and reassembly.
Dry screw vacuum pump is easy to disassemble: only the back cover bearing is removed to remove the rotor from the front end, which is very simple. If only cleaning and disassembly, just put the rotor back into the pump body after cleaning without any adjustment.
2. install
Claw pump assembly is difficult: when installing claw pump, the fourth stage rotor should control eight clearances at the end of the rotor. If any clearance between the rotor and the rotor is not adjusted properly, it must be re-machined. If the rotor is to be installed on the shaft, it must also impact the rotor, which is easy to damage parts. Dry screw vacuum pump is easy to assemble: when assembling screw pump, the clearance between screw and exhaust wall and clearance can be controlled only by controlling the clearance between exhaust end faces.
These are the advantages and disadvantages of dry screw vacuum pump and claw vacuum pump. Do you remember? To learn more about vacuum pump selection, please pay attention to EVP vacuum pump brand website!
Screw vacuum pump selection

Screw vacuum pump in nylon resin drying 

How to do overhaul of vacuum pump?

How to do the overhaul of vacuum pump? How to proceed the steps? Next we will follow the vacuum pump manufacturers to understand.
1. Cut off the power supply and unplug the power plug. If the pump is on the system, it should be removed from the equipment.
2. Turn open the oil bolt to release the oil, and move the pulley by hand, so that all the remaining oil in the pump chamber is released. Oil should be collected well, usually by putting an iron oil pan or disk on the bottom of the vacuum pump (commonly known as square disk) for distillation and recovery in the future and free from environmental pollution.
3. Remove the belt, remove the pulley and key, remove the bottom plate, and repair or send the electrician to wash the oil depending on the motor's quality (such as heat, dirty, noise from dry grinding, high vibration, etc.).
4. First remove the low vacuum end cover plate (the back end cover plate, which is far from the end of the pump wheel), and use different tools according to different screw when disassembling. For general hexagonal screw can use a rigid wrench, the inner hexagonal screw should use the inner hexagonal wrench, if necessary, the sleeve wrench, so that the screw will not be damaged. After unscrewing the end cover plate screw, lightly open the end cover plate. If the end cover plate is tightly packed, it should be slowly managed to open. For example, a file can be used to file a small groove at the joint between the pump chamber and the end cover plate. Then a screwdriver (taper) is inserted into the groove and a hand is used to knock the handle. A hammer can also be used to tap the screwdriver lightly to exit the end cover plate. Never hammer is allowed to knock heavily.
5. If the rubber gasket is sealed, remove the rubber gasket and withdraw from the positioning pin.
6. Remove the rotor and rotor. Usually, a dagger with two tapped threads at the end of the low rotor is easily pulled out by screwing the dagger with a screw rod. But we should pay attention to pulling out the rotor must use hand to tighten the blade, because the blade is subject to large spring force, it is easy to fly out, fall on the ground or encounter hard objects, break the edges and surfaces of the blade and cause unprovoked report.
7. Remove the high vacuum end and take out the high rotor and rotor. At this time, the rotor can be taken out by squeezing the blade and the shaft by hand.
8. Before disassembling the pump, it is necessary to know in advance the structural characteristics of the pump to be disassembled and repaired, and which structural type each component belongs to roughly. For example, parts that belong to the assembly itself, such as the rotors of some rotary vane pumps, should not be disassembled, and their surfaces can be properly modified and adjusted; if the assembly rotors fall into glass chips, metal foreign bodies injure the cavity or their own rotary vane grooves have been worn too much, they can be disassembled when they need to be repaired, but they should be carefully remembered. Assembly method.
9. Check the accuracy, smoothness and damage of each component. The edges and corners at both ends of the rotor and the rotor should be checked for damage and recorded. For those who are not familiar with pump repair business, they should gradually remember the original assembly location of each component and part, and make a good record, in order to avoid misremembering when reloading. At the same time, disassembled parts should not be placed in disorder, piled up, bruised and lost. It's best to put it on a square disk or in a wooden box and clean it up. Cover it with silk cloth.
Vacuum pump for steam activated

de-salination dewatering vacuum pump 

Noise Reduction in Rotary Vacuum Pump Production

Summary:
Noise of rotary vane vacuum pump usually refers to the noise level measured under the limit vacuum when the temperature is stable.
It includes the noise of the pump itself and the motor noise for users. It also cares about the noise of the start-up stage when the pump temperature is not stable and the noise of the operation under different inlet pressure, as well as the noise of the air-conditioning station. Therefore. A variety of factors should be considered.
The noise of the pump can be divided into the following aspects:
(1) The impact of the rotor on the cylinder block, the residual volume of the pump and the sound of the pressure oil in the exhaust dead gap;
(2) Impact of exhaust valve disc on seat and support;
(3) Echo and bubble burst in the box;
(4) Bearing noise;
(5) Noise caused by large amount of gas and oil impacting the oil baffle;
(6) Others. Such as noise caused by transmission, fan noise of air-cooled pump, etc.
(7) Motor noise, which is a crucial factor.
The proposals for the design treatment scheme are as follows:
1. The impact of the rotary blade on the cylinder wall.
If improper design, manufacture or material is used, the sliding of the rotary blade is not smooth, or because of the existence of exhaust dead gap, incompressible oil causes the head of the rotary blade to not always run close to the cylinder wall, which will cause the impact sound of the rotary blade on the cylinder wall. Therefore, the circular arc surface should be used to separate the intake and exhaust ports. Eliminate dead gap with exhaust guide groove. When using line separating structure, the distance between exhaust end point and tangent point should be shortened as far as possible. For rotary vane pumps below 70L/s, considering the actual thickness of the rotary vane, it is suggested to take 7-lOmm and large pump. Too close, due to rotation
There is only one narrow band contact between the sub-rotating vane groove and the head of the vane. Once the sealing effect is not good when the vane turns to the cutting point, it will affect the pumping speed and even the limit pressure of the pump. It can be seen that this structure can not completely eliminate the exhaust dead gap and limit the noise reduction level.
It should be pointed out that too much clearance between the rotor and the groove will degrade the performance. Therefore, it is necessary to ensure reasonable tolerance fit and tolerance value of form and position, pay attention to the thermal expansion of the rotary blade, avoid the brushing of the rotary blade and groove, pay attention to the cold oil viscosity of the oil, and design enough spring force of the rotary blade. When using circular arc surface separation, the additional eccentricity value of the rotor center should not be too large. Otherwise, when the blade passes through two circular arcs, there will be a tendency to break away from the cylinder wall at the intersection point, which will cause impact noise instead. Generally, small pumps are 0.20-0.25 mm, and large pumps can be enlarged appropriately.
The sound of pressure oil in exhaust dead gap and pressure oil in residual volume. When the pump reaches the limit pressure, the two pressure oils will be injected into the vacuum chamber at high speed when connected with the vacuum chamber, and impact with the rotor and cylinder wall to produce sound.
The size and location of the two volumes are related to noise.
2. Impact Noise of Valve Plate on Seat and Support
The larger the amount of inhaled gas, the more the circulating oil of the pump, the greater the noise of the valve plate, the higher the valve jump, the larger the area of the valve, the greater the noise of the valve plate, and the material of the valve plate has a certain impact. The noise of rubber valves should be better than that of steel plates or laminates. Therefore, to control the oil inflow, the valve should be closed in time and tightly. Pay attention to the material selection and structure of the valve.
3. This noise will increase with the increase of echo and bubble burst volume in the chamber. Therefore, this noise will increase obviously when the air is opened or in the atmosphere. If the gas ballast can be adjusted, the gas ballast can be adjusted reasonably.
4. Noise emitted when a large amount of gas and oil are discharged and impacting parts such as oil baffles. If the parts are not rigid enough or not tightened, vibration and collision will occur, which will increase the noise. Therefore, not only should the oil baffle be rigid enough and tightened, but also when contacting with other parts (such as oil tank), rubber clamping method can avoid collision noise caused by vibration and improve the oil-retaining effect.
Packing Machine Vacuum Pump

Blowers for Wastewater Treatment 

How to Clean up Oil Seal Failure of Stainless Steel Pump

Gear pump in long-term use, perhaps bad working conditions, will constitute wear and tear need to be repaired, in general, will cause serious wear of the shaft, oil pump shaft wear is mainly due to the friction between the two ends of the shaft and supporting needle wear, so that the diameter of the shaft becomes smaller.
Gear is manufactured with double arc sinusoidal curve tooth profile, which has no wear and tear on the tooth surface, smooth operation, no trap liquid appearance, low noise, long life and high efficiency. The pump has got rid of the bondage of the traditional statistical plan, and has entered a new field in the planning, production and application of gear pump.
The general geometric calculation of wear of stainless steel high temperature gear pump is as follows:
Tips for repairing wear and tear of pump parts:
When the positive modification coefficient X 1 = x 2 = 0.5, the geometric calculation of each part is as follows.
Dividing circle diameter: d = MZ = 3X12 = 36 (mm)
Top height: ha = m (f0 + x) = 3X (l + 0.5) = 4.5 (mm)
Root height: HF [= m (f0 + c-x) = 3X (l + 0.25 - 0.5) = 2.25 (mm)
Total tooth height: H = HA + HF = 4.5 + 2.25 = 6.75 (mm)
Top circle diameter: Da = D + 2ha = 36 + 2X4.5 = 45 (mm)
Fixed chord thickness: Sxn = m (pi/2*cos2a+xsin2a) = 3X (1.387+0.6428X0.5) = 5.125 (mm)
The tooth height for measuring the thickness of fixed chord teeth: hxn = m (pi/8*sin2a+xsin2a) = 3X (0.7476X0.117X0.5) = 2.42 (mm)
Modulus m3 modification coefficient x 0.5
Sxn5.12 Thickness of Fixed Chord Tooth with O20 Degree Tooth Shape Angle
Top Height Factor F1 Fixed Chord Thickness Measuring Maximum Tooth Height hxn2.42
Number of teeth Z12
When the oil seal of stainless steel pump has a fault, how to clean it? When the oil seal wears out, the rubber seal ageing. The rubber oil seal ageing of the unloading sheet will lose its elasticity. We can choose to replace the oil seal to clean up this shortcoming. Stainless steel gear pump shell wear, can increase the internal oil without impurities. Generally, wear and tear of internal parts of oil pump will cause internal leakage. During this period, the leakage area between the floating axle sleeve and the end face of the gear is large, which is the main part of the internal leakage.
Chemical vacuum pump

Vacuum pumps for machinery industry 

Noise-eliminating system of water-ring vacuum pump

The water ring vacuum pump is equipped with an oil-gas separator, which together with the oil mist eliminator forms a reasonable noise elimination system software, which can eliminate the noise of the exhaust pipe and prevent noise pollution. Pumps and motors are connected and installed immediately, evaporative cooling is selected, and no cooling water pipeline is needed. Therefore, this type of machine is compact in structure and simple in installation. Effective design, small vibration, no foot screw can only work.
The inner part of the water ring vacuum pump is equipped with an oil mist eliminator, which can reasonably remove the oil mist from the vapor discharged by the pump and prevent the oil mist from polluting the surrounding environment. The breathing port of the pump is equipped with a check valve. With the synergistic effect of the check valve and the hole specially designed in the pump when the pump terminates, the pump can be protected immediately with the software of the pumped system, and the oil pump can not be returned to the software of the pumped system. Together, the true total width of the pumped utensils can be maintained. Therefore, the water ring vacuum pump can be used without any further equipments. Vacuum pump shutoff valves with air release can reduce customer application costs.
Vacuum pump for vacuum impregnator

Vacuum Pump for Seawater Desalination 

How to Avoid Scaling in Vacuum Pump

The water quality and operation temperature of circulating water exceed a certain index, which is the main reason for scaling of vacuum pumps. Among the water quality indexes, the hardness of water is the most important factor. Therefore, it is necessary to reduce the hardness of water as much as possible and control the working temperature of circulating water in order to solve the problem of scaling of vacuum pumps.
1. Hardness of circulating cooling water
The operation process of circulating water in vacuum pump is very similar to that of pot water in low pressure hot water boiler. Therefore, to manage the water quality of vacuum pump according to the water quality standard of hot water boiler can prevent scaling of vacuum pump and corrosion of vacuum pump.
Vacuum pump circulating water system is mostly open circulating system with high return water rate. In the case of water treatment without ion exchange equipment due to capital and other reasons, a softening pond and a high-level pond are usually used to supply water to the vacuum pump.
2. Temperature Control of Circulating Cooling Water
From the above analysis, it can be seen that the difference between the water ring temperature of vacuum pump and the water temperature of softening pool is an important factor leading to scaling. Therefore, increasing the amount of circulating water supply and improving the cooling effect is an important guarantee to limit the scaling rate.
Therefore, in the process of circulating cooling water operation, it is also necessary to monitor the return water temperature and return water volume of each pump, in order to ensure the normal water supply of each pump and the return water temperature does not exceed the stipulation of 40 C. Water supply can be controlled by valve. If the return water temperature exceeds the stipulation, cold water should be added or other cooling methods should be adopted to reduce the temperature of softening water in the softening pond.
3. Wash pump body regularly
The pump body drainage gate valve of the water ring vacuum pump can not only discharge the accumulated water in the pump normally, but also wash the dirt and slag in the pump regularly by using the water pressure of the pump body during operation. On the one hand, it can prevent the accumulation of dirt, on the other hand, it can also prevent the water slag from turning into scale.
The scaling problem of vacuum pump has its complicated generating mechanism. Correct analysis of water quality index and operation parameters is the key to find out the correct preventive measures. In addition to water temperature control and regular rinsing of the pump body, water treatment is an important link to prevent the scaling of the pump body.
Liquid Ring Pump for Mining Industry

Liquid Ring Pump for Ozone Production 

Screw Vacuum Pump of Cooling Method

The cooling method of screw vacuum pump is mainly aimed at the condition of high temperature in the use of screw vacuum pump. If high temperature occurs in a short time, it is not a big problem, but if high temperature occurs in a long time, it should be paid attention to. Long-term high temperature conditions will damage all parts of the equipment, and even cause motor scrap when it is serious.
The first step should be to cool the shell. The screw vacuum pump can not take away the heat generated by working through the lubricant because the rotor has no lubricant in the working process. And it is an equal pitch screw vacuum pump, because there is no internal compression process, the exhaust temperature is very high, if the cooling effect is not good, it will cause the deformation of the rotor and the casing, affecting the pumping effect. Therefore, the shell of screw vacuum pump adopts double-layer tube wall hollow structure, which can be called cooling sleeve. Its built-in coolant is the main heat dissipation channel of screw vacuum pump. Water cooling is a common method. Cooling sleeve with cooling water can achieve the purpose of cooling the shell and then cooling the rotor. In addition, a few companies, such as Leebo, can cool the rotor through water, increase the life of the rotor, and achieve good cooling effect. However, the structural design needs certain technical and processing level support.
1. The original fan cover is lengthened by 40 cm, and an axial-flow fan with fan-through diameter is installed inside. The motor power requirement of the axial-flow fan is 850w, the speed is 14889r/min, and the voltage is 380V. The original fan is retained, the axial fan is set in another power supply control, the screw vacuum pump starts and the axial fan runs, and the main motor is fully cooled 30 minutes after the shutdown.
2. Keep the motor of screw vacuum pump clean and clean, regularly clean the dirt on the motor, increase the heat dissipation capacity.
3. Raise the bus voltage of screw vacuum pump to 400 V.
The cooling method of screw vacuum pump can reduce the temperature of equipment by adjusting the original fan to increase it. There is also the way that can achieve good results through water cooling heat dissipation. Choose the way that is suitable for you to use effective heat dissipation can be used to maintain the normal operation of the equipment.
Screw Vacuum Pump Price

Screw Vacuum Pump of Sale 

liquid ring vacuum pump display

What is the function of the eddy current pump?

Vortex pumps are often used to transport volatile liquids such as gasoline, alcohol, ether, benzene and liquefied petroleum gas; suitable for small flow and high lift conditions, such as boiler feed water, fire pump, high pressure cleaning pump, chemical process pump, hot oil circulation filtration, high pressure spray drying, etc. Floating, etc. or Self-priming function is required. It is suitable for clear liquid transportation of impurity-free particles with viscosity less than 50E. At present, Niconi eddy current pump is mainly used in petroleum, chemical industry, pharmaceuticals, dyes, beverages, pure water manufacturing, sewage treatment, boiler water supply, plastic processing, woodworking machinery, membrane separation, cleaning machine, laser unit, construction, sanitation, environmental protection, food processing, aquaculture, clothing shaping and so on.
Vortex pump is a kind of vane pump. It is mainly composed of impeller and pump shell with annular passage. The impeller is a disc. The blades on the circumference are uniformly arranged in a radial shape. There are two kinds of impellers, open and closed. The pump body and impeller form an annular flow passage, and the suction and discharge ports are all located at the outer circumference of the impeller, separated by a separator. When the impeller rotates, under the action of centrifugal force, the velocity of the liquid in the impeller is greater than that in the flow passage, thus forming an "annular eddy current". Because the liquid follows the impeller, the combination of these two motions causes the liquid to produce the same "longitudinal vortices" as the impeller turning, hence the name "eddy current pump". As the liquid particles enter the impeller blades from the pump passage many times, the liquid particles get one energy every time they pass through the blades. Therefore, under the same impeller diameter, the head of the scroll pump is higher than that of the centrifugal pump, and the mixing degree of the liquid in the pump is many times larger than that of the centrifugal pump.
What is a Scroll Pump?

What should be considered when purchasing vacuum pumps 

Various Reasons Analysis of Screw Pump No Oil

(1) Before the start-up of the oil pump, the insufficient oil is not filled. Sometimes it seems that the oil has overflowed from the vent, but the air is completely discharged without turning the shaft of the pump, resulting in a small amount of air remaining in the intake pipe or pump body.
(2) The reverse oil flow direction of the oil level section of the oil intake pipe contacted with the oil pump shall be reduced by more than 0.5%, and the end connecting the inlet of the oil pump shall be the highest, not the full oil level. If it is raised upward, air will be retained in the intake pipe, which reduces the vacuum in the tubing and oil pump and affects oil absorption.
(3) The filler of oil pump has been worn out for a long time or the filler pressure is too loose, which causes a large amount of oil to eject from the clearance between the filler and the pump shaft sleeve. As a result, the external air enters the interior of the oil pump from these clearances, affecting the oil extraction.
(4) Because of the long-term potential oil, there are holes in the wall of the intake pipe. After the oil pump works, the oil surface drops continuously. When these holes are exposed to the oil surface, air enters the civil intake pipe from the holes.
(5) Cracks occur at the elbow of the intake pipe and small clearances occur at the connection between the intake pipe and the oil pump, which may cause air to enter the intake pipe.
The speed of oil pump is too low
(1) Human factors. Some users are driven by another motor at will because of the damage of the original distribution motor, resulting in low flow, low lift and even no oil.
(2) Mechanical failure of the oil pump itself. The loosening of fastening nut between impeller and pump shaft or the deformation and bending of pump shaft may cause the impeller to move more, friction directly with pump body, or bearing damage, which may reduce the speed of oil pump.
(3) The maintenance of power engine is not good. Loss of excitation due to burnout of motor windings, changes in winding turns, wire diameter and wiring method in maintenance, or failure not completely eliminated in maintenance will also change the speed of oil pump. The suction range is too large, some oil sources are deeper, and some oil sources are relatively flat, while the allowable suction range of the pump is neglected, resulting in less or no oil suction at all. It is necessary to know that the vacuum can be established at the suction port of the oil pump is limited. The absolute vacuum suction range is about 10 meters high, and the absolute vacuum can not be established by the oil pump. And the vacuum degree is too large, which is easy to make the oil and gas in the pump, which is not conducive to the work of the oil pump. Therefore, each centrifugal pump has its maximum allowable suction range, generally between 3-8.5 meters. Installation of oil pumps should not be simple and convenient. The resistance loss of oil flow in and out of the tubing is too large. Some users have measured that although the vertical distance from the oil storage tank or oil tower to the oil surface of the oil source is slightly smaller than the pump head, the oil quantity is still small or no oil is available. The reason is that the pipeline is too long, there are many bends in the pipeline, and the resistance loss of oil flow in the pipeline is too large. The reason is that the pipeline is too long, there are many bends in the pipeline, and the resistance loss of oil flow in the pipeline is too large. In general, 90 degree elbow has greater resistance than 120 degree elbow. The head loss of each 90 degree elbow is about 0.5-1 m, and that of every 20 meters pipe can be about 1 m. In addition, some users are also free to pump in and out of the pipe diameter, which also has a certain impact on the lift.
The influence of other factors
(1) The bottom valve cannot be opened. Usually due to the oil pump shelf time is too long, the bottom valve washer is sticky, no gasket bottom valve may rust.
(2) The bottom valve filter screen is blocked, or the filter screen is blocked in the sludge layer in the potential oil of the bottom valve.
(3) Impeller wear is serious. The blade of impeller is worn out after long-term use, which affects the performance of oil pump.
(4) Gate valve check valve failure or blockage will cause flow reduction or even no oil pumping.
(5) The leakage of the outlet pipeline will also affect the oil lift.
Dry scroll pump of manufacturer

Dry Screw Pump Supplier 

Patent Analysis in the Technical Field of Screw Vacuum Pump

By using Devont Innovation Index Database and Patent Information Service Platform, the patent data information before 2015 was collected for both international and domestic markets. The annual development trend of screw vacuum pump industry, main patentees, main inventors, industry research and development hotspots, etc. were analyzed emphatically. Finally, the true screw was obtained. Relevant conclusions on R&D status and competitive situation of air pump industry.
Patent analysis, also known as patent intelligence analysis, is the collection of patents in a specific period of time in a technical field, and screening, statistics and research the information contained therein to form information with high value, so as to provide reference for the government, enterprises and other strategic decision-making. According to the statistics of the World Intellectual Property Organization (WIPO), 90%~95% of R&D achievements can be obtained in patent documents. If patent documents can be effectively used, R&D expenditure can be reduced by 40% and R&D time can be shortened by 60%.
Oil-free screw vacuum pump is a kind of dry vacuum pump with huge market potential, which is suitable for many fields such as semiconductor, chemical industry, pharmacy and so on. In recent years, the research and development, popularization and application of screw vacuum pump products have been developed rapidly in China. At the same time, the patent protection awareness of screw vacuum pump enterprises is constantly strengthened. However, the author finds that there are few literatures on patent analysis of screw vacuum pump industry at present, so this paper uses patent analysis method to study the development trend of screw vacuum pump industry and other related situations for reference.
Dry scroll pump

Dry screw pump  

Maintenance and Maintenance of Oilless Screw Vacuum Pump

1. Daily maintenance of oil-free screw vacuum pump
1) Check and adjust the oil level in the crankcase in normal position.
2) Check and eliminate leakage, leakage and leakage.
3) Check and adjust the tension of the triangular belt to normal (finger pressure 15-25 mm)
4) Keep the pump clean.
5) When the pump body is found to be overheated, abnormal sound and other abnormal conditions, the machine should be stopped in time for inspection.
2. 100-hour maintenance
In addition to the maintenance according to the "routine maintenance" project, it must also be maintained.
1) After the first oil change for 100 hours, replace all the lubricating oil in the crankcase, and then replace it every 1000 hours. The oil discharge and cleaning must be carried out while the pump stops.
2) Open the cover, remove the disc, seat and spring, and clear the dirt on it. If abnormal wear is found, it should be repaired or replaced.
3) Check fasteners, bolts, bolts, nuts, belts, etc.
3. 1000 Hours Maintenance
In addition to completing the 100-hour maintenance project, it is also necessary to:
1) Check whether the cylinder bolts, connecting rod bolts and nuts, piston rod nuts, pulley locking nuts suction queue pipe bolts and other bolts are abnormal.
2) Check the matching between the disc and the seat, and make abrasive modification if necessary. At the same time, remove the dirt in suction, exhaust and valve seat, valve cover and so on.
3) Check the wear and tear of cylinder inner wall, piston ring, cross head and cross head sliding sleeve, cross head pin and connecting rod small head bearing bush, crank pin and connecting rod big head bearing bush, and replace them when necessary.
4) Check the piston opening interval, and clean the piston, piston ring groove dirt.
5) Remove sediment from cylinder and parts.
4. After 2000-2500 hours of operation, the pump should be overhauled. All parts and components should be cleaned and inspected. The parts with serious wear and tear should be replaced. After overhaul, when the piston is in the upper and lower dead-point position, the two end planes of the piston should be basically equal to the upper and lower end planes of the cylinder (within 0.5-0.8mm). The assembled pump can be put into operation only after running for 1-2 hours to confirm that everything is normal. If the pump is ready to stop using for a long time, clean the lubricating oil and cooling water while shutting down, wash the crankcase with clean lubricating oil and release the oil. After injecting new lubricating oil, rotate the crankshaft pulley several times by hand. The holes of the pump are wrapped with plastic cloth to prevent rainwater, dust and debris from falling into the triangular belt. Pulp pumps are stored in ventilated, dry and non-corrosive gas covered areas.
How to Select High Quality Dry Vacuum Pump

Screw Vacuum Pump for Electronic Photovoltaic 

oil diffusion vacuum pump

How to Prevent the Safety Hidden Danger of Water Ring Vacuum Pump

In the daily use of water-ring vacuum pump, it is very important to select the product quality, because the water-ring vacuum pump should be shut down in a planned way. And according to the management regulations, when the water ring vacuum pump needs to shut down, it will damage the equipment or cause corresponding safety risks.
1. When the line in the mine is out of order due to overhaul.
2. When the power department at a higher level, the company, the line maintenance or failure needs to be shut down.
3. When the water ring vacuum pump is out of operation due to failure or periodic switching.
4. When the circulating water pool needs to be replaced.
5. When the water ring vacuum pump needs to be shut down due to other special circumstances or reasons.
6. Welding of nearby drainage pipelines and replacement and installation of other ancillary devices.
The potential safety hazards of water-ring vacuum pumps should be prevented in a planned way, and the importance of safety development for the masses can be imagined. So the ultimate goal of using water ring vacuum pump is to minimize safety accidents and reduce the loss of personal and property.
Screw vacuum pump industrial manufacturers

Vacuum pump in brick factory 

Do you know how water ring vacuum pump works?

Before starting the water ring vacuum pump, it should be done: check whether there is a plug in the disc coupling, check the surrounding safety environment, check whether the screw is tightened, whether the parts are not missing, whether the smooth point is outstanding, close the intake pipe and exhaust pipe before driving, and then pour water into the filler culvert and gas-water separator of the pump, when the gas-water separation occurs. When the device overflows, turn on the motor, then turn on the exhaust pipe and intake pipe.
After starting the water ring vacuum pump, we should stick to the position, often check the motor, bearing temperature is normal, each smooth point is smooth or outstanding, adjust the water intake of the water seal, reduce the water consumption as far as possible in order to ensure the sealing of the pump, adjust the water supply, and keep the water level of the air-water separator at a regular height. The pump can reach the highest vacuum with the least water consumption.
Often check whether the vacuum pump and the active drainage device are normal, and prohibit filtrate from entering the vacuum pump. The standby pump should be operated every ten days to avoid rust in the pump. When parking water-ring vacuum pump, we should first close the intake pipe and then the exhaust pipe, then cut off power and stop filling and water filling in the gas-water separator.
When the overflow of the gas-water separator stops overflowing, the irrigation pipe in the pump is closed. If the pump parks for a long time, it is necessary to unscrew the drainage pipe of the pump and gas-water separator to completely drain the water. In winter, anti-freezing operation should be done to avoid freezing cracking of the pump and water pipe.
Screw Vacuum Pump in Sewage Treatment

Screw Vacuum Pump in Wood Processing 

Simple Water Filling Method for Stainless Steel Vacuum Pump

Before starting the stainless steel vacuum pump, the pump and the intake pipe should be filled with water, otherwise the pump can not lift water. Sometimes we may have some water in the pump because of the last use, but it is not enough for this use. At this time, we need to fill it with water. What is the method?
1. Artificial filling method for small pumping stations whose diameter of intake pipe is less than 300 mm usually has a bottom valve at the intake pipe. Generally, artificial filling method is adopted, that is, the water filling funnel (or an inverted ordinary bottle without the bottom of the bottle) fills the water from the special filling vent on the upper part of the pump shell.
2. Vacuum tank filling method can be used for small pumping stations without bottom valves.
3. Before starting the stainless steel vacuum pump, fill the water tank with water to seal. After the start of the pump, the pump enters the water from the vacuum tank. As the water level of the tank drops, a certain vacuum will be formed in the tank. Under the action of atmospheric pressure, the water in the intake pool will enter the tank through the intake pipe, thus forming a water cycle, which will make the pump start to operate normally.
4. The most common usage is to install the manual pump on the suction hole of the stainless steel vacuum pump or on the intake pipeline near the pump for air pumping and water diversion, making it a tool for filling water when the stainless steel vacuum pump is turned on, thus saving the bottom valve of the intake pipeline of the pump, reducing energy consumption and improving the efficiency of the pump device. 。
5. Self-diverting water filling method for semi-submerged pumping station (that is, pumping station whose inlet pipe and pump top are all below the water level of the intake pool), water can be introduced into the pump by itself without manual irrigation and diversion. The advantages of this kind of pumping station are obvious, that is, it is easy to realize the automation of pumping station and has strong timeliness.
Filling the stainless steel vacuum pump is the work needed to maintain the equipment. Regular filling can prolong the service life of the equipment and improve the working efficiency of the machine. It is a two-in-one method.
Material Liquid Ring Vacuum Pump for Spacecraft

Third Organization World Sao Paulo