Rotary vane vacuum pump works

Rotary vane vacuum pump can extract dry gas from sealed container, and a certain amount of condensable gas can be extracted if a gas ballast device is attached. But it is not suitable for extracting gases with excessive oxygen, corrosive to metals, chemical reaction to pump oil and particulate dust.

Rotary vane vacuum pump is one of the most basic vacuum acquisition equipment in vacuum technology. Rotary vane vacuum pumps are mostly small and medium-sized pumps. There are two kinds of rotary vane vacuum pumps: single-stage rotary vane vacuum pump and double-stage rotary vane vacuum pump. The so-called two-stage rotary vane vacuum pump is to connect two single-stage rotary vane vacuum pumps in series. Generally, double-stage rotary vane vacuum pumps are made to obtain higher vacuum. The relationship between the pumping speed and the inlet pressure of the rotary vane vacuum pump is as follows: under the inlet pressure of 133 3a, 1.33 Pa and 1.33 *10-1 (Pa), the pumping speed of the rotary vane vacuum pump shall not be lower than 95%, 50% and 20% of the nominal pumping speed of the pump, respectively.

The working principle of rotary vane vacuum pump, rotary vane pump is mainly composed of pump body, rotor, rotary vane, end cover, spring and so on. A rotor is eccentrically installed in the cavity of the rotary vane pump. The outer circle of the rotor is tangent to the inner surface of the pump cavity (there is a small gap between them). Two rotary vanes with springs are installed in the rotor groove. When rotating, centrifugal force and spring tension keep the top of the rotor in contact with the inner wall of the pump chamber. Rotor rotation drives the blade to slide along the inner wall of the pump chamber.

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