涡旋压缩机小曲拐防自转机构动力特性分析  

Dynamics Characteristics Analysis of Anti-rotation Mechanism of Mini-crank in Scroll Compressor

作　　者：李超[1] 郑尚书[1] 赵嫚[1] 余洋[1] 

机构地区：[1]兰州理工大学,兰州730050

出　　处：《中国机械工程》2014年第2期236-241,共6页China Mechanical Engineering

基　　金：国家自然科学基金资助项目(50975132;51265026)

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。To study the dynamics charactenstms oI off- tree scroll compressor anti- rotatxon mechanism,a model of anti--rotation mechanism of mini--crank was established. On the basis of op- eration 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 estab- lished. Three--dimensional model of a mini--crank was established by 3D modeling software and fi- nite 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 de- formation between three mini--cranks was discussed. The results show that the maximum deforma- tion 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.

关 键 词：涡旋压缩机 小曲拐 有限元法 变形 应力 疲劳强度 

分 类 号：TH45[机械工程—机械制造及自动化]