变转速工况下电动汽车涡旋压缩机切向泄漏研究  

Tangential leakage of scroll compressor of electric vehicle under variable speed condition

作　　者：钱月 唐景春 QIAN Yue;TANG Jingchun(School of Automobile and Traffic Engineering, Hefei University of Technology, Hefei 230009, China)

机构地区：[1]合肥工业大学汽车与交通工程学院,安徽合肥230009

出　　处：《合肥工业大学学报（自然科学版）》2022年第3期302-306,共5页Journal of Hefei University of Technology：Natural Science

基　　金：合肥工业大学博士专项科研资助基金(JZ2016HGBZ0748)。

摘　　要：针对电动汽车涡旋压缩机动、静涡旋盘径向间隙产生的切向泄漏问题,文章基于油膜润滑理论计算模型,利用有限差分方法数值求解二维雷诺方程,得出动、静涡旋盘径向间隙上的油膜压力分布规律以及压缩机转速变化时涡旋盘壁面上的油膜承载力和表面摩擦力的变化规律。压缩机性能实验结果表明:随着压缩机转速的增大,泄漏间隙随之减小,表面摩擦力随之增大;压缩机转速增大时,制冷量增加,但压缩机运行功耗也相应增加;在压缩机转速为5000 r/min时,其性能系数COP达到最大值2。In response to the tangential leakage problem produced by radial clearance of orbiting-fixed scroll disc in electric vehicle scroll compressor,the two-dimensional Reynolds equation is solved by using the finite difference method based on the calculation model of oil film lubrication theory.The distribution law of oil film pressure on the radial clearance of orbiting-fixed scroll disc,and the change law of oil film bearing capacity and surface friction on the wall of scroll with the change of compressor speed are obtained.Experimental results show that with the increase of the compressor speed,the leakage clearance decreases and the surface friction increases;when the speed of the compressor increases,the cooling capacity increases,but the power consumption also increases;when the speed of the compressor is 5000 r/min,COP reaches the maximum value of 2.

关 键 词：变转速工况 径向间隙 周向泄漏 润滑计算 油膜压力 

分 类 号：TB652[一般工业技术—制冷工程]