涡旋压缩机小曲拐防自转机构动力特性分析

摘要/Abstract

摘要：

针对无油润滑涡旋压缩机防自转机构的动力特性问题,建立了小曲拐防自转机构的机构模型;基于小曲拐防自转机构的工作原理，从运动学和机构学角度分析小曲拐的受力,建立小曲拐的运动平衡方程;利用三维建模软件和有限元分析软件ANSYS建立了单个小曲拐的三维模型，分析了防自转机构小曲拐数目为3时,小曲拐在不同曲轴转角下的变形和应力状态，并对小曲拐在交变载荷作用下的疲劳强度及3个小曲拐的变形协调关系进行了分析。结果表明,小曲拐的最大变形发生在上下两端,最大应力发生在上下两端和中间退刀槽部分。

关键词: 涡旋压缩机, 小曲拐, 有限元法, 变形, 应力, 疲劳强度

Abstract:

To study the dynamics characteristics of oil-free scroll compressor anti-rotation mechanism, a model of anti-rotation mechanism of mini-crank was established. On the basis of operation principle of anti-rotation mechanism of mini-crank, the force action on the mini-crank was analyzed with the kinematics and the mechanism, and the motion equation of mini-crank was established. Three-dimensional model of a mini-crank was established by 3D modeling software and finite element analysis software ANSYS. The number of anti-rotation mechanism of mini-crank has three, the deformation and stress state of the mini-crank in the different crank angles were analyzed, fatigue strength under alternating loads of the mini-crank was studied and the compatible state of deformation between three mini-cranks was discussed. The results show that the maximum deformation occurs in the upper and lower ends and the maximum stress occurs in the upper and lower ends and intermediate undercuts part in mini-crank.

Key words: scroll compressor, mini-crank, finite element analysis, deformation, stress, fatigue strength

中图分类号:

TH45

李超, 郑尚书, 赵嫚, 余洋. 涡旋压缩机小曲拐防自转机构动力特性分析[J]. 中国机械工程, 2014, 25(2): 236-241.

Li Chao, Zheng Shangshu, Zhao Man, Yu Yang. Dynamics Characteristics Analysis of Anti-rotation Mechanism of Mini-crank in Scroll Compressor[J]. China Mechanical Engineering, 2014, 25(2): 236-241.

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