流体机械

2020, v.48;No.580(10) 30-35+75

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多载荷耦合作用下涡旋压缩机动涡旋盘的应力应变分析
Stress and Strain Analysis of Orbiting Scroll of Scroll Compressor under Coupled Action of Multiple Loads

李超;刘竞中;王海宏;张晓东;
Li Chao;Liu Jingzhong;Wang Haihong;Zhang Xiaodong;College of Petroleum and Chemical Engineering,Lanzhou University of Technology;

摘要(Abstract):

为了更准确地研究涡旋压缩机动涡旋盘实际运转时的应力应变情况,以某型号的涡旋压缩机为研究对象,分析了实际稳定运行工况下动涡旋盘温度载荷的非线性分布情况。采用ANSYS Workbench有限元分析软件分别计算了动涡旋盘在非均匀热载荷、气体力载荷、惯性载荷单独作用时以及热-气-固3种载荷耦合作用下应力与应变的变化规律。研究表明在气体力载荷单独作用下,动涡旋盘的应力应变与涡旋齿两侧气体压力差有关,压力差越大,形变越大;在惯性载荷单独作用下,最大形变发生在吸气腔最外侧齿顶位置;而热载荷的作用使得涡旋盘的最大形变位置发生了变化,动涡旋盘的最大形变位置由第二压缩腔移至排气腔齿顶。同时,相比于气体力载荷和惯性载荷引起的形变量,热载荷使得总形变量大幅增加,在多载荷耦合作用下最大形变发生在涡旋齿排气腔齿头处。
In order to study the stress and strain of the orbiting scroll of scroll compressor in actual operation,the scroll compressor of a model was used as the research object to analyze the nonlinear distribution of the temperature load of the orbiting scroll of a scroll compressor in actual stable operation.The finite element analysis software ANSYS Workbench was used to calculate the stress and strain change rules of the orbiting scroll under the action of non-uniform heat load,gas force load and inertia load and the coupled action of all the three loads.The results show that the stress-strain of the scroll is related to the gas pressure difference between the two sides of the scroll under the action of the gas force load alone,and the larger the pressure difference is,the larger the deformation is;under the action of the inertia load alone,the maximum deformation occurs at the top of the outermost tooth of the suction chamber;while under the action of the thermal load,the maximum deformation position of the scroll changes,and the maximum deformation position of the scroll moves from the second compression chamber to the tooth top of the exhaust chamber.At the same time,compared with the shape deformation caused by the gas force load and inertia load,the total shape deformation is greatly increased by the thermal load,and the maximum deformation occurs at the tooth head of the scroll tooth exhaust chamber under coupled action of multiple loads.

关键词(KeyWords): 涡旋压缩机;动涡旋盘;非线性温度载荷;热流固耦合;形变规律
scroll compressor;orbiting scroll;nonlinear temperature load;thermal fluid-solid coupling;deformation law

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作者(Authors): 李超;刘竞中;王海宏;张晓东;
Li Chao;Liu Jingzhong;Wang Haihong;Zhang Xiaodong;College of Petroleum and Chemical Engineering,Lanzhou University of Technology;

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