Working principle of the rotary vane vacuum pumps -

rotary vane vacuum pump ( Rotary vane pump) Is a kind of mechanical vacuum pump oil seal type. The working pressure for the range of 101325-1. 33 × 10- 2 ( Pa) Belongs to the low vacuum pump. It can be used alone, also can be used for other backing pump of high vacuum or ultra high vacuum 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 vacuum pump to remove the dry gas in the sealed container. If installed air device, it can also remove a certain amount of condensable gases. However, it does not apply to take out high oxygen content, corrosive to metal, chemical reaction of gas and dust sucker.

rotary vane vacuum pump is one of the most basic of vacuum to obtain equipment in vacuum technology. Rotary vane pump is mainly small and medium-sized pump. Rotary vane pump is single stage and double stage two. The so-called two-stage are two series of single-stage pump structure. Usually divided into two stages in order to obtain higher vacuum degree. Rotary vane vacuum pump pumping speed and inlet pressure of the relationship between the rules as follows: in the inlet pressure is 1333 pa, 1. 33 pa and 1. 33 × 10- 1 ( Pa) Respectively, the pump speed value shall not be less than 95% of the rated pumping speed of the pump. 50% and 20%.

rotary vane vacuum pump is mainly composed of pump body, rotor, vane, plate, springs, etc. The rotor eccentricity is installed in the rotary vane pump cavity. The inner surface of the rotor outer circle and the pump cavity tangent ( Have a very small gap between) 。 In the rotor slot installed two rotor with a spring. In the process of rotation, the top of the rotary vane by centrifugal force and the spring tension to keep contact with the inner wall of the pump housing, and the rotor rotation to drive the spiral slide along the lining of the water pump cavity.

as shown, two rotary vane of the rotor and the water pump cavity and surrounded by two end cover crescent-shaped space 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. And vent connected space C volume decreases, and in the exhaust process. The central space B volume decreases, and in the compression process. Because of the space of A volume increase gradually, The expanded) , so the pressure is reduced, and pump at the entrance to the external pressure is stronger than the pressure in the space of A, so gas is inhaled.

when A space from the inlet port, transfer them to the position of the space B, gas begins to be compressed, volume decreases, finally connect to the outlet. When compressed gas than exhaust pressure, the exhaust valve be pushed away, compressed gas, the gas emissions to the atmosphere through the fuel tank of oil. The continuous operation of the water pump to achieve the purpose of continuous pumping. If through the air exhaust channel transfer (to another Low vacuum level) Level, the low vacuum sucking it and then compressed into the atmosphere side by side in the atmosphere, thus forming two stage pump. At this point, the total score for the two stage, thus increase the ultimate vacuum.

the above is the working principle of the rotary vane vacuum pump demo figure, need to know more about the working principle of the rotary vane vacuum pump please click recommended articles.

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