Method for determining reasonable design area of roots pump rotor molding line and application of method

Abstract

The invention discloses a method for determining a reasonable design area of a roots pump rotor molding line and an application of the method and belongs to the field of mechanical design. According to the method, after a relation between the roots pump rotor molding line and performance parameters is established, constraint conditions for avoiding the closing volume and undercuts are further determined, and thus, the reasonable design area of a roots pump rotor blade peak curve is determined; reference is given when the roots pump rotor molding line is designed, and in other words, a rotor molding line with a blade peak curves being not within the reasonable design area definitely cause the problem of the closing volume and the undercuts in application; so that when the roots pump rotor molding line is designed, the rotor molding line which can cause the closing volume and the undercuts can be avoided; the problem that the rotor molding line is not found being designed unreasonably until design is completed is avoided; and thus, the design efficiency of the rotor molding line is improved.

Description

technical field [0001] The invention relates to a method for determining a reasonable design area of ​​a Roots pump rotor profile line and an application thereof, belonging to the field of mechanical design. Background technique [0002] Roots pump refers to a variable displacement vacuum pump that is equipped with two leaf-shaped rotors that rotate synchronously in opposite directions. Due to the characteristics of its own structure and performance, it is widely used in chemical industry, paper making, power generation, food and other industries. [0003] The pair of rotors of the Roots pump, as the key components of the Roots pump, have a great influence on the performance of the Roots pump; According to the research on the performance parameters of the Roots pump, it is found that the higher the utilization factor of the rotor area, the greater the air volume and the weeping rate of the Roots pump, but it is necessary to consider whether there will be closed volume and u...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem of closed volume and undercut of the rotor after the design is completed due to the improper selection of the design parameters of the existing Roots pump rotor profile, the present invention provides a method for determining the reasonable design area of ​​the Roots pump rotor profile and Its application makes it possible to predict whether the designed Roots pump rotor profile will produce closed volume and undercut problems according to this method when designing the rotor profile of the Roots pump, so as to make corresponding modifications, so that the designed Roots pump The pump rotor profile can avoid closed volume and undercut problems as much as possible, and improve the design qualification rate and design efficiency of the Roots pump rotor profile

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