Roots pump rotor and Roots pump

Abstract

The invention discloses a rotor of a roots pump and the roots pump. The basic forming curved section A1A2A3A4A5 of the molded line of the rotor is composed of a tooth crest arc section, a pseudo polynomial curved section, a conjugate curved section of a pseudo polynomial curve and a tooth root arc section, all of which are sequentially connected end to end. The pseudo polynomial curved section A2A3 is tangent to the tooth crest arc section A1AA1. The basic forming curved section A1A2A3A4A5 and a curved section A1A'2A'3A'4A'5A'6 symmetric with the basic forming curved section A1A2A3A4A5 are combined into a tooth molded line A'6A'5A'4A'3A'2A1A2A3A4A5 of a tooth. The tooth molded line A'6A'5A'4A'3A'2A1A2A3A4A5 is repeated according to the number n of teeth of the molded line of the rotor of the roots pump to generate n tooth molded lines, and the tooth molded lines are sequentially connected end to end to generate a complete rotor molded line. The two rotor molded lines are the same and can be engaged in the rotating process. By means of the rotor, part of points of original molded lines are eliminated, the design parameter space of the molded line of the rotor of the roots pump is expanded, and the performance of the roots pump is improved.

Description

technical field [0001] The invention belongs to the field of mechanical engineering, and in particular relates to a Roots pump rotor and a Roots pump. Background technique [0002] Roots pump is a positive displacement rotary pump, which can be used to obtain dry, low-pollution high-vacuum environment and compress clean gas, and has a wide range of applications in modern industry. It inherits many advantages such as long service life, reliable operation, small vibration, low noise, stable operation, no surge phenomenon, etc., and has no wearing parts such as air valves, forced suction and exhaust, and simple processing. Therefore, in recent years, it has become the preferred pump type in vacuum systems and some low-pressure air compression systems. [0003] The core components in the Roots pump are two rotors. The selection of the rotor profile determines the structure of the rotor, which affects the overall operating performance of the pump. The optimal design of the rotor...

AI Technical Summary

Problems solved by technology

[0004] However, the variable space for the shape parameters of the current Roots pump rotor profile is insufficient, resulting in a single profile shape that can be found by optimization, making the Roots pump rotor using this profile unable to adapt to the current changing applications. With changing application performance requirements, in addition to increasing the variable space of shape parameters, it can also effectively improve the performance of the optimized Roots pump

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