Roots vacuum pump working principle

The working principle of Roots pump is similar to roots blower.Due to the continuous rotation of the rotor, the gas is drawn from the inlet into the space V0 between the rotor and the pump housing, and then discharged through the outlet.Since the v0 space is completely closed after inhalation, the gas does not compress and expand in the pump chamber.However, when the top of the rotor turns the edge of the exhaust port and the V0 space is in contact with the exhaust side, as the gas pressure on the exhaust side is relatively high, a part of the gas rushes back into the v0 space, making the gas pressure suddenly increase.When the rotor continues to rotate, the gas out of the pump.

Performance characteristics of Roots vacuum pump

1. A larger pumping speed within a wider pressure range;

2. Fast start-up, able to work immediately;

3, is not sensitive to the dust and water vapor contained in the pumped gas;

4, the rotor does not need lubrication, no oil in the pump cavity;

5, small vibration, rotor dynamic balance conditions are good, there is no exhaust valve;

6. Low driving power, low mechanical friction loss;

7. Compact structure and small floor space;

8. Low operation and maintenance cost.

Therefore, roots pump in metallurgy, petrochemical, paper, food, electronic industry sector has been widely used.