Roots vacuum pump structure

Roots vacuum pump is a kind of vacuum pump without internal compression, usually the compression ratio is very low, so high and medium vacuum pumps need front-stage pumps, because of the special working environment and industry needs, the requirements for equipment is very high, divided into different types of products. How the two rotors of Roots vacuum pump are arranged in the pump body determines the overall structure of the pump. There are generally three schemes for the overall structure of Roots vacuum pump.

1. Vertical type: the axis of the two rotors is installed horizontally, but the plane of the axis of the two rotors is perpendicular to the horizontal plane. This kind of structure, the inlet and outlet of the pump is arranged horizontally, so it is convenient to assemble and connect the pipeline.roots-vacuum-pump-using-in-vacuum-process

2. Horizontal type: the axes of the two rotors are installed horizontally, and the plane formed by the axes of the two rotors is horizontally oriented. The inlet of the pump with this structure is above the pump and the outlet is below the pump (and vice versa). The exhaust ports below are usually horizontally connected, so the intake and exhaust directions are perpendicular to each other. The exhaust port is connected with a three-way pipe which opens in two directions. One end is connected with the exhaust pipe, and the other end is used when the by-pass valve is dead or connected with the by-pass valve. The structure is characterized by low center of gravity and good stability at high speed. Large and medium-sized pumps at home and abroad mostly use this structure.liquid-ring-vacuum-pump-coal-chemical-industry

3.vertical shaft type: two rotors of some roots pumps abroad are installed perpendicular to the horizontal plane. The assembly gap of the structure is easy to control, and the assembly of the rotor is convenient and the occupied area is small.