Overview of the use and maintenance of the rotary vane vacuum pump: The rotary vane pump is a variable volume gas transfer vacuum pump with a working pressure range of 1.33x10-2~105 Pa. It can be used alone or as a backing pump for other high vacuum pumps to pump dry gases in sealed containers, but it is not suitable for pumping dry gases with high oxygen content, corrosiveness to metals, reaction with pump oil, and particulate dust. gas. There are two types: single stage and double stage.

　　The structure of rotary vane vacuum pump includes filter screen, intake pipe, pressure plate, exhaust valve plate, rotating plate, spring, rotor, oil drain plug, oil standard, exhaust port, pulley, shaft end seal and interstage exhaust channel. It has the characteristics of simple structure and reliable operation, and is widely used.

　　Working principle and structural characteristics of rotary vane vacuum pump

　　Working principle of rotary vane vacuum pump: It is a vacuum pump with variable volume, relying on several rotating plates inserted into the eccentric rotor, it can slide in and out, isolate, compress and discharge the gas in the pump body. Structural features of rotary vane vacuum pump: The structure can be divided into two categories: oil-sealed and oil-immersed.

　　There are three types of pump body structure of rotary vane vacuum pump: integral type, middle wall press-in type and combined type. There are three types of rotor construction: monobloc, compression sleeve and rotor disc. The exhaust valve is one of the main vulnerable parts of the rotary vane pump, which affects the pumping performance of the pump and generates noise. There are two forms: one is to use a rubber pad as the valve plate; the other is to use a cloth phenolic pressure plate or a spring steel sheet as the valve plate, and the exhaust valve must be immersed in the pump oil.