A method for determining the reasonable design area of ​​the rotor profile of Roots pump and its application

Abstract

The invention discloses a method for determining a reasonable design area of ​​a Roots pump rotor profile and an application thereof, belonging to the field of mechanical design. In the present invention, after establishing the relational expression of the Roots pump rotor profile and performance parameters, further determining the constraint conditions for avoiding the closed volume and undercutting, thereby determining the reasonable design area of ​​the Roots pump rotor blade peak curve, in the design of the Roots pump The reference is given for the profile of the pump rotor, that is, the profile of the rotor whose blade peak curve is not in this reasonable design area will inevitably lead to the problem of closed volume or undercut in the application, so that the rotor profile of the Roots pump can be designed Avoid designing a rotor profile that would result in closed volume or undercutting, without waiting until the design is completed to discover that the rotor profile design is unreasonable, thereby improving the design efficiency of the rotor profile.

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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