The role of the roots pump

The roots pump is a vacuum pump with no internal compression, and the compression ratio is usually very low, so high and medium vacuum pumps require a backing pump. It is a vacuum pump that relies on the synchronous and counter-rotating pushing action of a pair of vane-shaped rotors in the pump chamber to move the gas and realize the pumping of gas. Roots vacuum pump refers to a mechanical vacuum pump with a pair of sole-shaped rotors with synchronous high-speed rotation, this pump can not be pumped alone, and the pre-stage needs to be equipped with oil seals, water rings, etc., which can be directly discharged to the atmosphere. Its structure and working principle are similar to those of roots blowers, and its suction port is connected to the main pumping pump of the vacuum vessel or vacuum system when working.