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Twisted roots rotor as well as design method thereof, compressor and expander

A design method and rotor technology, applied in machine/engine, rotary piston machinery, design optimization/simulation, etc., can solve problems such as limited area utilization, single parameters, and increased twisted-blade Roots rotor profile.

Active Publication Date: 2021-03-26
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a twisted-lobe Roots rotor and its The design method and the compressor and expander can increase the parameter design space of the twisted-lobe roots rotor profile and improve the area utilization factor of the twisted-lobe roots rotor profile

Method used

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  • Twisted roots rotor as well as design method thereof, compressor and expander
  • Twisted roots rotor as well as design method thereof, compressor and expander
  • Twisted roots rotor as well as design method thereof, compressor and expander

Examples

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Embodiment

[0067] A design method for a twisted-lobe Roots rotor, comprising the following steps:

[0068] 1) Determine pitch circle radius R p , the target aspect ratio and the number of teeth n. In this example, Take 1.4.

[0069] 2) Generate meshing line bus S 1 , S 1 is the arc segment L of the original arc type line 1 m 1 Corresponding meshing lines, such as Figure 4 shown. S 1 aspect ratio Satisfy is the maximum diameter-to-spacing ratio when the tooth curve just does not produce undercutting phenomenon, when n=4, It can be seen that the original arc profile cannot reach the target diameter-to-spacing ratio requirements. in this example Take 1.32.

[0070] Let the tangent point of the yin and yang rotor pitch circle be O p , in the coordinate system X p o p Y p Medium, L 1 m 1 Segment corresponding to meshing line S 1 parametric equation for:

[0071]

[0072] in, is the arc segment L 1 m 1 The tooth curve equation, is the corresponding ...

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Abstract

The invention discloses a twisted roots rotor as well as a design method thereof, a compressor and an expander. The twisted roots rotor comprises a female rotor and a male rotor which are of the samestructure, wherein a single-tooth tooth form A1B1C1D1E1F1G1H1I1 of an end surface molded line of the female rotor consist of a circular-arc section A1B1, a composite curve section C1D1, a circular-arcsection D1E1, a circular-arc section E1F1, a composite curve section F1G1, a composite curve section G1H1 and a circular-arc section H1I1 which are sequentially connected; a complete type molded lineis formed by rotating the single-tooth tooth form around the origin O1 of the rotor molded line and connecting end to end for n times, wherein n is a tooth number of the molded line; and in a rotaryengagement process, the two rotors are accurately engaged. The invention also provides the design method of the twisted roots rotor as well as the compressor applying the rotor and the expander. The twisted roots rotor overcomes the defect that the design parameter space of the original twisted roots type molded line is insufficient, also breaks through the valuing limitation of the spacing-diameter ratio of the original molded line, and increases an area utilization coefficient.

Description

technical field [0001] The invention belongs to the field of rotor design, and in particular relates to a twisted-lobe Roots rotor, a design method thereof, a compressor and an expander. Background technique [0002] Twisted-lobe Roots compressor is a rotary compressor. Its core components are two intermeshing rotors. Through the synchronous rotary motion of the two rotors, the process of suction, compression and exhaust is completed. The compressor has many advantages such as high speed, low noise, reliable operation, and simple processing. It is mostly used in medium and low pressure gas transportation occasions, especially in petrochemical, pharmaceutical, electronics, and aerospace fields. [0003] The profile line of the rotor end surface of the twisted lobe Roots compressor has a significant impact on the performance of the whole machine. At present, the commonly used end face shape line is arc-arc envelope line type, such as figure 1 As shown, its main parameters ar...

Claims

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Application Information

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IPC IPC(8): F04C29/00F04C18/12G06F30/17G06F30/28F01C1/12F01C21/08
CPCF04C18/082F04C18/126G06F30/17G06F30/28F01C1/082F01C1/126F01C21/08F04C2240/20F04C2250/20
Inventor 韦炜何志龙李丹童孙崇洲王嘉辰
Owner XI AN JIAOTONG UNIV
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