Oil Sealed Rotary Vane Vacuum Pump Troubleshooting

Oil-sealed rotary vane vacuum pump has a long history, has formed a complete production process, has mature technology, and has the characteristics of high efficiency, reliability, low noise and easy maintenance, not only widely used in coating, packaging, suction, refrigeration, air conditioning, lighting, color tubes, vacuum heat treatment, vacuum defoaming, pouring, molding and other industrial applications, but also are widely used in laboratories, scientific research places. 


The common oil-sealed rotary vane vacuum pump has a belt drive and a direct connection structure, that is, the drive motor and the pump casing are directly connected with a flange, the shaft of the pump and the motor is directly connected by an elastic coupling. The cooling method is generally air-cooled for small models, large models are air-cooled and water-cooled, using the principle of volume conversion generated by the eccentric rotor during operation to evacuate, and the vacuum pump oil plays the role of cooling, lubricating and sealing during operation.


Due to the wide applications of oil-sealed rotary vane vacuum pumps, and the relatively harsh working conditions used, the probability of failure is relatively high.

The common failures are:

① The pump cannot be started

② The pump cannot reach the ultimate pressure

③ The pumping speed is too slow

The temperature of the pump is too high during operation

⑤ Oil is found in the vacuum pipeline or in the pumped container

The noise of the pump is too large

⑦ Vacuum pump oil leakage

⑧ The motor part is faulty


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