CO_2涡旋压缩机动力学特性的研究  

Research on the Dynamic Characteristic of CO_2 Scroll Compressor

作　　者：郝璟瑛[1] 王智忠[1] 赵远扬[1] 李连生[2] 张薇[1] 卜高选[1] 

机构地区：[1]西安交通大学能源与动力工程学院,西安710049 [2]合肥通用机械研究院压缩机技术国家重点实验室,合肥230031

出　　处：《制冷学报》2011年第5期42-46,共5页Journal of Refrigeration

摘　　要：通过对动盘和十字滑环所构成的力系进行分析,建立了CO2涡旋压缩机样机的动力学模型,并采用全局牛顿法进行数值求解。在三种压缩机转速下,计算了十字滑环和曲柄销受力随主轴转角的变化规律,并给出了主要运动部件的摩擦功耗随主轴转角的变化规律。结果表明:随着转速的提高,十字滑环受到的最大作用力分别为:21.07N,25.71N和30.81N,曲柄销受到的最大作用力分别为899.89N,1045.34N和1133.51N,主轴承的耗功百分比增加。在所计算的工况范围内,动静盘间的耗功是最大的机械摩擦损失来源,占到了总摩擦损失的45%左右,其次是主轴承耗功,占到了总摩擦损失的33%左右,十字滑环的耗功所占比例非常小,仅为0.23%左右。Based on the analysis of all the forces and moments acting on the orbiting scroll and the Oldham ring,the dynamic model of the CO2 scroll compressor prototype was established.At the condition of three different speeds,the forces acting on the Oldham ring and the orbiting scroll were calculated respectively.The simulation results propose that the maximum values of the forces acting on the Oldham ring are 21.07N,25.71N and 30.81N respectively,the maximum values of the forces acting on the crank pin are 899.89N,1045.34N and 1133.51N respectively,andthe mechanical friction losses on the main bearing are increased.At the above given operating conditions,the friction loss between the orbiting scroll and fixed scroll is the largest one and covers about 45 percent of the overall mechanical friction losses,the second is the friction loss on the main bearing and covers about 33 percent,and the friction loss on the Oldham ring is very small and only covers about 0.23 percent.

关 键 词：动力机械工程 CO2 涡旋 全局牛顿法 机械摩擦损失 

分 类 号：TH45[机械工程—机械制造及自动化] TB657[一般工业技术—制冷工程]