Oil Sealed Rotary Vane Vacuum Pump Structure and Principle

The oil-sealed rotary vane vacuum pump has a long history and has formed a complete production process. It has the characteristics of mature technology, high efficiency, reliability, low noise and easy maintenance. It is not only used in coating, packaging, holding, refrigeration, air conditioning, lighting, color tube, vacuum heat treatment, vacuum deaeration, pouring, molding and other industrial fields, and it also can be 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 body are directly connected by flange, and the pump and motor shaft are connected by an elastic coupling.

The cooling method is generally air-cooled. Large models have air-cooled and water-cooled version.

Due to the wide application of oil-sealed rotary vane vacuum pumps and the relatively harsh working conditions, the probability of failure is relatively high. Following are common faults.

① The pump cannot be started

② The pump cannot reach the ultimate pressure

③ The pumping speed is too slow

④ The temperature of the pump is too high during operation

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

⑥ Pump noise is too loud

⑦ Oil leakage

⑧ Motor is partly faulty 

According to the specific analysis of the causes and common handling methods of these failures, please check these blog posts.

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