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A scroll expander

A vortex expander and static vortex technology, which is applied in the field of expanders, can solve the problems of increased thermal deformation of scroll teeth, and achieve the effects of reduced deformation, uniform temperature distribution, and reduced pressure difference

Active Publication Date: 2021-07-09
XIANGYANG HANGLI ELECTROMECHANICAL TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a scroll expander to solve the technical problem of increasing the thermal deformation of the scroll teeth in the prior art

Method used

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  • A scroll expander
  • A scroll expander
  • A scroll expander

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Embodiment Construction

[0035] The present invention will be further described below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.

[0036] Such as figure 1 As shown, a scroll expander, the scroll profile of the scroll expander is an involute with variable base circle radius. The radius of the base circle and the radius of curvature of the involute are functions of the involute angle, satisfying:

[0037]

[0038]

[0039] in: Indicates the radius of the base circle of the involute; Indicates the radius of curvature of the involute; Indicates the involute expansion angle; a 0 Indicates the radius of the initial base circle; k indicates the variable index; δ 0 Indicates the correction increment.

[0040] The variable index k>0, if k=0, the wall thickness of the vortex line remains unchanged, and at this time, t...

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Abstract

The invention discloses a vortex expander in the field of expanders, aiming to solve the technical problems of large exhaust resistance of the vortex expander under high temperature conditions, rising working chamber temperature, and increased thermal deformation of scroll teeth. A vortex expander, the vortex profile of the vortex expander is an involute with variable base circle radius. The involute type scroll expander with fixed base circle radius was selected as the prototype machine, and the spiral tooth height, scroll tooth development angle, tooth head correction parameters and initial base circle radius were kept constant, and the base circle radius was gradually changed according to the variable base circle radius. Open profile machining spiral. Compared with the original expander, the flow in the back pressure chamber is improved, the temperature of the movable and static scroll teeth is reduced, the heating effect of the suction air collection chamber on the working chamber is weakened, and the deformation of the scroll teeth is reduced.

Description

technical field [0001] The invention belongs to the technical field of expanders, in particular to a scroll expander. Background technique [0002] The scroll expander has become a comparatively popular organic Rankine cycle waste heat recovery system for vehicle engines due to its outstanding advantages such as stable operation, low noise, high efficiency, compact structure, and good reliability, as well as the operating conditions of small flow rate and high expansion ratio. Good work parts. Although the technical application of scroll machinery as a compressor in the field of refrigeration is relatively mature, the application research on scroll expanders is still lacking, and there are no mature products. Most scroll expanders are converted from scroll compressors. . In the actual working process, even if a well-designed scroll compressor is converted into an expander, due to the influence of factors such as friction, leakage, internal flow loss and heat transfer, the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01C1/02F01C21/18
CPCF01C1/0223F01C1/0269F01C21/18
Inventor 刘祯
Owner XIANGYANG HANGLI ELECTROMECHANICAL TECH DEV
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