Rotary vane vacuum pump working principle is introduced

rotary vane vacuum pump is a kind of mechanical vacuum pump oil seal type. The working pressure for the range of 101325-1. 33×10- 2 belongs to the low vacuum pump. It can be used alone, also can be used as other high vacuum pumps or ultra-high vacuum booster water pump. It has been widely used in metallurgy, machinery, military industry, electronics, chemical industry, light industry, oil and medicine production and scientific research departments.

rotary vane pump can pump out dry gas in the sealed container, if installed air cargo, ballast, can also pump out a certain amount of condensable gases. However, it is not suitable for containing too much oxygen pump, metal, corrosive, react with pump oil and gas containing dust particles.

rotary vane pump is one of the most basic vacuum acquisition equipment of vacuum technology. Rotary vane water pump are mostly small and medium-sized pump. Rotary vane pump including single-stage rotary vane pump ( FIG. 1) And two stage rotary vane pump. The so-called two stage rotary vane pump is two series single stage rotary vane pump. Usually divided into two stages in order to obtain higher vacuum degree. Rotary vane pump pumping speed and inlet pressure of the relationship between rules are as follows: in the inlet pressure is 1333 mpa, 1. 33 and 1. 33 10 - 1 ( Palmer) When the pump speed value shall not be less than 95% of the rated pump speed respectively, 50% and 20%.

rotary vane pump is mainly composed of pump body, rotor, rotor blades, end cover, spring, etc. Rotor mounted eccentrically in the rotary vane pump cavity, the rotor outer circle and inner surface tangent pump cavity ( There is a small gap between) , two rotary vane pumps with a spring is installed on the rotor slot. Rotates, the top of the rotating plate by centrifugal force and the spring tension keep contact with the pump cavity wall, the rotor spins rotate plate along the pump cavity wall slip.

4 kw rotary-vane vacuum pump rotor, pump room and two end cover crescent-shaped space surrounded by two rotating plate is divided into three parts: A, B and C. When the rotor rotates along the direction of the arrow, and suction connected space A volume increase gradually, and in the suction process. Connected with vent space volume decreases and C in exhaust process. The central space, the size of B has decreased gradually and in the compression process. Because of the space of A volume increase gradually, I. e. , inflation) , the gas pressure is reduced, and the pump inlet gas pressure is greater than the space of the external pressure, in A gas is inhaled. When space is A from the suction, namely when it moved to the location of the space B, gas begins to be compressed, volume decreases, finally connect to discharge it. When compressed gas than exhaust pressure, the exhaust valve is compressed gas away, reservoir of gas through the tank side by side in the atmosphere. The continuous operation of the pump to achieve the purpose of the continuous extraction. If the gas channel transfer (to another through the air Low vacuum level) , before discharge into the atmosphere, it is low level low vacuum extraction and vacuum level compression, thus forming two stage pump. At this point, the total compression ratio by two stages, thus increasing vacuum degree in the end.