流体机械

2020, v.48;No.575(05) 31-37

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基于流场分析的变截面涡旋齿的强度分析
Strength Analysis of Variable-section Scroll Wrap Based on Flow Field Analysis

王建吉;刘涛;胡天林;
Wang Jianji;Liu Tao;Hu Tianlin;School of Mechanical and Electronic Engineering Department,Longdong University;School of Mechanical and Electrical Engineering,Lanzhou University of Technology;

摘要(Abstract):

为了研究涡旋压缩机在多场载荷耦合作用下变截面涡旋齿的变形和应力分布,基于动网格技术,利用Fluent软件对涡旋压缩机工作过程进行流场模拟,将温度场和压力场分析结果直接导入ANSYS软件中,利用间接耦合的方法对动涡旋齿和动、静涡旋齿装配后在单场及多场耦合作用下强度进行分析。结果表明:温度场对涡旋齿变形影响较大,耦合场下的变形并不是各场单独作用下变形之和;装配后涡旋盘的安装间隙对涡旋齿的变形存在干涉,单独分析动涡旋齿时的变形大于装配后的变形;根据应力分布分析,最大值出现在涡旋齿壁厚较大的位置,说明该组合型线涡旋齿具有较强的抗变形能力,可为判断涡旋型线优劣和研究涡旋压缩机间隙与泄漏提供理论基础。
In order to accurately analyze the stress and strain distribution of the variable-section scroll wrap under the action of gas-thermal coupling fields,based on the dynamic grid technology and using ANSYS Fluent software,the gas flow field simulation analysis was made on the working process of the scroll compressor.By importing the results of temperature field and pressure field analysis directly into ANSYS software and using the indirect coupling method,the strength of orbiting scroll wrap and strength of orbiting and stationary scroll wrap under action of single field and coupled action of multiple fields after assembly were analyzed.The results show that the temperature field has a great influence on the deformation of scroll wrap,and the deformation under the coupling field is not the sum of the deformation under the separate action of each field.the installation clearance of scroll disk after assembly interfered with the deformation of scroll wrap,and the deformation when the orbiting scroll wrap was analyzed separately was bigger than that after assembly;According to the analysis of stress distribution,the maximum value appeared in the position with large wall thickness of scroll wrap,indicating that the scroll wrap of this combined profile has strong anti-deformation ability.It provides a theoretical basis for judging the quality of scroll profile and studying the clearance and leakage of scroll compressor.

关键词(KeyWords): 涡旋压缩机;变截面;涡旋齿;流场;变形规律
scroll compressor;variable section;scroll wrap;flow field;deformation rule

Abstract:

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基金项目(Foundation): 国家自然科学基金项目(51665035);; 甘肃省高等学校创新能力提升工程项目(2019B-160)

作者(Author): 王建吉;刘涛;胡天林;
Wang Jianji;Liu Tao;Hu Tianlin;School of Mechanical and Electronic Engineering Department,Longdong University;School of Mechanical and Electrical Engineering,Lanzhou University of Technology;

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