十字滑环防自转机构间隙对涡旋啮合特性的影响  

Research on the effect of clearance of the anti-rotation mechanism of Oldham ring on the meshing characteristics of scrolls

作　　者：李冰 杨超 李超[1] LI Bing;YANG Chao;LI Chao(School of Petrochemical Engineering,Lanzhou University of Technology,Lanzhou 730050,China)

机构地区：[1]兰州理工大学石油化工学院,兰州730050

出　　处：《流体机械》2022年第3期34-39,46,共7页Fluid Machinery

基　　金：国家自然科学基金项目(51265026)。

摘　　要：为了探讨涡旋压缩机中十字滑环防自转机构间隙对涡旋啮合特性的影响。根据压缩腔的几何学理论,建立了动涡旋发生自转时涡旋型线的描述方程,确定了涡旋盘自转前后啮合位置的变化规律。并通过结合啮合规律和几何关系,推导出自转角与涡旋盘径向啮合间隙的关系表达式。在得到动静涡旋盘为保证正常工作可允许的最大自转范围的同时,以动涡旋盘与十字滑环之间的运动关系为基础,推导出十字滑环凸键与动涡旋盘之间所允许的最大装配间隙关系式。将推导的关系式利用Matlab进行验证,通过设置基圆半径为3.5 mm、回转半径为6.49 mm及渐开线发生角为0.643 rad的涡旋盘和十字环的内外径等参数,求出该模型下十字滑环与动涡旋盘背面滑槽之间所允许最大间隙为0.066 mm。In order to investigate the effect of clearance of Oldham ring anti-rotation mechanism on scroll disc of scroll compressor,according to the geometry theory of the compression chamber,the meshing variation law of the orbiting scroll disc was determined,and the description equation of the orbiting scroll profile was established.By combining the meshing law and geometric relationship,the relational expression between the rotation angle and the radial meshing clearance of the scroll was deduced.While obtaining the maximum allowable rotation range of the orbiting and stationary scroll discs to ensure normal operation,based on the kinematic relationship between the orbiting scroll disc and the Oldham slip ring,maximum assembly clearance relationship allowable between the convex key of the Oldham slip ring and the orbiting scroll was deduced.The derived relational expression was verified by Matlab,by setting parameters such as the inner and outer diameters of the scroll disc and the Oldham ring with a radius of base circle of 3.5 mm,a radius of gyration of 6.49 mm and an involute angle of 0.643 rad,the maximum clearance of 0.066 mm allowable between the lower Oldham slip ring and the slideway on the back of the orbiting scroll disc was obtained.

关 键 词：涡旋压缩机 基圆渐开线 径向间隙 数学模型 

分 类 号：TH45[机械工程—机械制造及自动化]