Roots vacuum pump (hereinafter referred to as roots pump) is equipped with two opposite directions on the opposite direction of the rotor. The clearance between the rotor, the rotor and the pump housing is small, so do not contact the variable capacity vacuum pump.
The water ring vacuum pump is equipped with an eccentric rotor with fixed blades to put water (liquid) on the stator wall, and water (liquid) forms a liquid ring concentric with the stator. The liquid ring and the rotor blade form a variable volume vacuum pump.
Roots vacuum pump in petroleum, chemical, plastic, pesticide, turbine rotor dynamic balance, aerospace space simulation and other equipment has been long-term operation test, should be vigorously promoted and applied in China. It is also widely used in petroleum, chemical, metallurgy, textile and other industries. Vacuum pump accessories for vacuum pump noise control, vacuum pump muffler.
Water ring vacuum pump is mainly used in coal (pumping), chemical, pharmaceutical, mining, papermaking, food, beer, building materials, plastics, metallurgy, power and other industries.
Roots vacuum pump is characterized by fast start-up, low energy consumption, low operation cost, fast pumping speed, high efficiency, gas containing a small amount of water vapor and dust is not sensitive, in the pressure range of 100-1 PA is a large pumping rate, which can quickly eliminate the sudden release of gas. This pressure range is just between the oil sealed mechanical vacuum pump and the diffusion pump. Therefore, the diffusion pump and oil seal mechanical vacuum pump are usually connected in series to increase the pumping pressure in the middle pressure range. At this time it is also known as a supercharged pump.
The water ring vacuum pump has the advantages of simple structure, low manufacturing accuracy, convenient processing, compact structure and higher pump speed. It is generally directly connected with the motor without the need of deceleration device. Therefore, using small structure size, it can obtain large displacement, small floor area, uniform suction, stable and reliable, simple operation, convenient maintenance, but low efficiency, generally about 30% up to 50%, low vacuum.
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