At present, the rapid development of domestic light vehicles has undoubtedly provided a vast market for vacuum power-assisted pumps.
Vacuum booster pumps are mainly used to extract vacuum in light-duty power assisted braking systems. They can also be used in other transportation vehicles and construction machinery. The use of vacuum assisted braking system can improve the braking reliability and reduce the driver's fatigue, help reduce the incidence of traffic accidents, and improve vehicle safety.
Vacuum booster working principle and maintenance
At present, the rapid development of domestic light vehicles has undoubtedly provided a vast market for vacuum power-assisted pumps.
Vacuum booster pumps are mainly used to extract vacuum in light-duty power assisted braking systems. They can also be used in other transportation vehicles and construction machinery. The use of vacuum assisted braking system can improve the braking reliability and reduce the driver's fatigue, help reduce the incidence of traffic accidents, and improve vehicle safety.
Therefore, in the process of promotion and use, we must understand and master its performance and principles. Only in this way can we effectively guarantee the pump's braking performance, prolong its service life, and play a role in safety protection.
1 How vacuum booster works
Vacuum booster pump mainly consists of pump body, rotor, slider, pump cover, gear, sealing ring and other parts. When the pump works, the eccentric rotor with four sliders rotates counterclockwise. Under the action of its own centrifugal force, the slider slides against the inner wall of the pump. The suction chamber expands continuously, and the pumped gas passes through the suction. The tube opens the one-way valve (one-way valve in the pump, and plays a pressure-keeping function on the system) into the suction chamber. When the slider is turned to a certain position, suction is completed. At this point, the inhaled gas is isolated, the rotor continues to rotate, and the isolated gas is gradually compressed - the pressure rises. When the studio is turned to communicate with the vent, the gas exits through the vent.
During the working of the pump, the slide always divides the pump chamber into four working chambers. There are four intake and exhaust processes for each revolution of the rotor.
2 Use and Maintenance
Vacuum booster pump is a kind of vacuum pump with higher precision and more sensitive work. The following rules must be strictly observed when using:
(1) The vacuum booster pump uses oil to lubricate the friction surface and seal each gap (gap formed by the rotor, slider, pump body, and pump cover). Therefore, it is necessary to select suitable lubricant and appropriate lubrication method.
(2) When used, it should always check whether the operation and lubrication are normal and whether there is abnormal noise, so that it can be found in time (model picture forum) and troubleshooting.
(3) During use, check the pump for leaks.
(4) If the vacuum booster pump is not used for a long time, it shall not be fully loaded immediately when it is used again.
3 common faults and troubleshooting
(1) The maximum degree of vacuum pumping is low and the extraction time is extended
cause of issue:
The viscosity of the lubricating oil is not sufficient; the air leakage from the air pumping line: parts are worn out;
Troubleshooting and troubleshooting:
Check the viscosity of the lubricating oil. If it is not qualified, replace the oil with the proper viscosity. Check if there is any leakage in the pipes. If there is leakage, replace the leakage parts: Check the parts for wear, if any, repair or replace them. New parts; check lubricating oil pressure and meet specified requirements.
(2) Insufficient pump pressure, leakage
cause of issue:
Seal leak
Troubleshooting and troubleshooting:
Check if the seal ring is worn and if there is any elasticity. If there is wear, you need to change the seal ring.
(3) Leakage at each interface
cause of issue:
Loose joints or damaged seals
Troubleshooting and troubleshooting:
Check for looseness of the joint. If it is loose, tighten the joint with sealant. If the seal is damaged, replace it with a new one.
4 Cautions when disassembling the pump
The components in the vacuum booster pump have high machining accuracy and assembly accuracy. Under normal circumstances, the user should not disassemble. If there is a problem, it should be sent to the manufacturer or repair center for inspection and repair. If it is necessary to dismantle, pay attention to the following matters:
(1) Vacuum booster pump rotor and gear are interference fit and cannot be removed.
(2) The parts are not allowed to bump or scratch. The parts are cleaned with kerosene and stored in a clean box.
(3) When installing the slider, it should be noted that the slider arc faces outward and must not be installed reversely.
(4) The parts must be cleaned during assembly.
(5) After the pump is assembled, the rotor should be flexible
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