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The roots vacuum pump can't separate extraction? - - - - - -

by:J&T     2020-05-23

roots vacuum pump is a kind of mechanical vacuum water pump, with a pair of synchronous high-speed rotating rotor of sole. The pump can't separate pumping air. The front level need to be equipped with oil seal, water ring, etc. Direct discharge of air. The structure and working principle are similar to those of roots blower. The inlet connected to the vacuum container or vacuum system of the main pump. The vacuum water pump rotor and rotor and there is no contact between the rotor and the pump shell.

general clearance to 0. 1 to 0. 8 mm; Don't need lubricating oil. Including arc, involute and cycloid rotor profiles. Involute rotor pump volume efficiency is high, the machining accuracy is easy, so the rotor type line of involute. The roots vacuum pump speed can reach 3450 ~ 4100 RPM. The extraction rate of 30 - 10000 litres per second ( 1 liter = 10 - 3 m) ;

roots vacuum pump is a kind of mechanical vacuum pump, with a pair of synchronous high-speed rotating rotor of sole. The pump can't separate pumping air. The front level need to be equipped with oil seal, water ring, etc. Direct discharge of air. The structure and working principle are similar to those of roots blower. The inlet connected to the vacuum container or vacuum system of the main pump. The vacuum pump rotor and rotor and there is no contact between the rotor and the pump shell.

clearance generally is 0. 1 to 0. 8 mm; Don't need lubricating oil. Including arc, involute and cycloid rotor profiles. Involute rotor pump volume efficiency is high, the machining accuracy is easy, so the rotor type line of involute. The roots vacuum pump speed can reach 3450 ~ 4100 RPM. The extraction rate of 30 - 10000 litres per second ( 1 liter = 10 - 3 m) ; The limit of single stage vacuum is 6. 5×10- 2 mpa, the double level 1 x 10 - 3.

the limits of roots pump vacuum depends not only on the structure and the manufacturing precision of the pump itself, also depends on the limit of vacuum pump before. In order to improve the limiting vacuum pump, roots pump can be used in series. The working principle of roots pump and roots blower are similar. Due to the continuous rotation of the rotor, pumping the gas from the air inlet are drawn into the space between the rotor and the pump shell where v0, then through the air outlet. Because where v0 space after inhaling fully closed, the pump room of gas compression and expansion. However, when the top of the rotor turning around the edge of the vent and where v0 space and exhaust side connected, due to the high gas pressure, exhaust side some gas rushed back to the space where v0, cause the gas pressure increases suddenly. As the rotor continues to rotate, leave a gas pump. Roots pump in the pump chamber, there are two '8' rotor mounted in a pair of parallel axis perpendicular to a pair of mutual reverse gear transmission ratio of 1 with synchronous rotation. Between the rotor and rotor and the pump shell wall to keep a certain gap between, thus can realize high-speed operation.


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