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Vortex expansion machine

A vortex expander and static vortex technology, which is applied in the field of expanders, can solve the problems such as the increase of thermal deformation of the scroll teeth, and achieve the effects of reducing the deformation, reducing the pressure difference, and weakening the secondary flow intensity

Active Publication Date: 2019-07-30
XIANGYANG HANGLI ELECTROMECHANICAL TECH DEV
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  • Abstract
  • Description
  • Claims
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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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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 expansion machine in the field of expansion machines. The vortex expansion machine aims at solving the technical problems that under the high-temperature condition, the exhaust resistance of the vortex expansion machine is large, the temperature of a work cavity is increased, and heat deformation of vortex teeth is increased. The vortex molded line of the vortex expansion machine is a various-base-radius involute. A fixed-base-radius involute vortex expansion is adopted as a prototype, and vortex teeth are machined according to the various-base-radius involuteunder the condition that the vortex tooth height, the vortex tooth spread angle, the tooth head correction parameter and the initial base radius are maintained unchanged. Compared with an original expansion machine, flowing in a back pressure cavity is improved, the temperature of the movable vortex teeth and the static vortex teeth is reduced, the heating effect of an air suction and collection chamber on the work cavity is weakened, and the deformation of the vortex 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 Applications(China)
IPC IPC(8): F01C1/02F01C21/18
CPCF01C1/0223F01C1/0269F01C21/18
Inventor 刘祯
Owner XIANGYANG HANGLI ELECTROMECHANICAL TECH DEV
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