Two-stage water-ring vacuum pump

Abstract

The invention provides a two-stage water-ring vacuum pump. The two-stage water-ring vacuum pump comprises a front pump cover, a rear pump cover, a communication pipe, a front guide disk I, a front guide disk II, a rear guide disk I, a rear guide disk II, a front impeller, a rear impeller, a front-stage pump body, a rear-stage pump body, bearing supports and a shaft, wherein the front impeller and the rear impeller are arranged on the shaft, the shaft is fixedly arranged on the front pump cover and the rear pump cover through the bearing shafts at two ends, so that an eccentric structure is formed, and the eccentricity of the front impeller and the rear impeller in a pump body is 24.5 millimeters. The two-stage water-ring vacuum pump has the beneficial effects that the compression ratio of first and second vacuum cavities is adjusted, the eccentricity of the impellers in the pump body is adjusted, and the gaps between the guide disks and the impellers are adjusted, so that the compression ratio of the vacuum pump is improved under the condition that the length and the diameter of the vacuum pump are not increased, the overall compression ratio between an admission port and an exhaust port is about 50 to 1, so that the ultimate vacuum of the vacuum pump is greatly improved, and the power consumption of the operation of the vacuum pump is reduced.

Description

technical field [0001] The invention relates to the mechanical field, in particular to a two-stage water ring vacuum pump. Background technique [0002] At present, the vacuum distillation, concentration, dehydration, drying in many chemical and pharmaceutical industries, as well as exhaust gas extraction in power plants, all require a large suction volume between the suction pressure of 33 mabr ~ 100 mbar. In the field of beer filling, it is required that the suction volume at the inlet should be more than 500m3 / hour under the suction pressure of 80-100mbar. The single-stage water ring vacuum pump generally has a stable working point between 400 and 600mbar, which cannot meet the process requirements of the filling system. However, the old-fashioned two-stage water ring vacuum pump has problems such as high energy consumption and high noise under the same working conditions. [0003] For example, the invention patent with the notification number CN203430810U discloses a t...

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the problems of high energy consumption and high noise of the two-stage water ring vacuum pump in the prior art, the present invention provides a two-stage water ring vacuum pump. The specific technical scheme is as follows:

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