直线压缩机性能优化分析

Performance Optimization Analysis of Linear Compressors

在直线压缩机电磁学及动力学性能分析的基础上,开展了直线压缩机性能优化分析,实验研究了不同性质材料对于直线压缩机电机等效电阻的影响,理论分析了谐振弹簧及活塞支撑轴承布置位置对压缩机机摩擦力的影响。结果显示气缸活塞均采用不导磁材料时,工作电流范围内,50 Hz时等效电阻和等效电感平均值分别为6.84Ω和0.307 H,60 Hz等效电阻和等效电感平均值分别为6.64Ω和0.308 H;与气缸活塞采用导磁金属材料相比,采用不导磁材料时电机等效电感基本不变,但是等效电阻50 Hz时降低了2.45Ω,约降低了35.8%,60 Hz时降低了2.26Ω,约降低了34.0%,可有效提升电机性能;通过分析谐振弹簧安装在直线压缩机2个轴承支撑点中间位置时,因压缩机弹簧偏转等造成的活塞与气缸之间的摩擦力最小,从而可以有效改善压缩机机械效率。

Based on the analysis of electromagnetism and dynamic performance of linear compressor,the performance optimization analysis of linear compressor was carried out.Experimental research was conducted on the effect of materials with different properties on the equivalent resistance of linear compressor motors.Theoretical analysis was conducted on the influence of the arrangement position of resonant springs and piston support bearings on the friction force of compressor.The results show that when the cylinder pistons are made of non-magnetic material,within the working current range,the average values of equivalent resistance and equivalent inductance at 50 Hz are 6.84Ω and 0.307 H respectively,and the average values of equivalent resistance and equivalent inductance at 60 Hz are 6.64Ω and 0.308 H respectively.Compared with the use of magnetic conductive metal materials for cylinder pistons,the equivalent inductance of the motor remains basically unchanged when non-magnetic materials are used,but the equivalent resistance decreases by 2.45Ω at 50Hz(about 35.8%),and 2.26Ω at 60 Hz(about 34.0%),which can effectively improve the performance of motor.By analyzing that when the resonant spring is installed in the middle of the two bearing support points of linear compressor,the friction between piston and cylinder caused by the deflection of compressor spring is the smallest,which can effectively improve the mechanical efficiency of compressor.