汽车空调旋叶式压缩机排气阀片的振动分析及优化

通过对旋叶式汽车空调压缩机排气阀片的运动分析,建立了阀片振动数学模型,分析了其固有频率和各点的振动位移,并结合UG NX Nastran模态计算结果,确定了排气阀片的固有频率和振型。基于振动分析的优化设计表明,阀片厚度选取为0.305 mm时,压缩机制冷效率达到了最高点。而测试结果证明,压缩机的噪声和排气脉动也得到了最有效的控制,两者均都低于美国通用汽车公司"GMW标准"的规定上限,表明排气阀片的振动分析与优化设计是合理的。研究结果对控制排气阀片振动,提高压缩机的制冷效率以及降低压缩机排气脉动和噪声等具有重要的实际意义。

Vibration Analysis and Optimization Design of Vane Compressor Discharge Valve for Car Air Conditioner

By analyzing the motion of vane compressors for car air conditioner we proposed a mathematical model for the vibration of the discharge valve and determined its natural frequencies and mode shape in combination with the calculation using UG NX Nastran software. We show that the refrigeration efficiency can be maxima when the valve sheet takes the optimized thickness of 0.305 mm based on the vibration analysis. At the same time, test results revealed that the discharge flow pulsation and system noise are effectively controlled, and the both are lower than the upper limit of the "GMW Standard" of the U.S. General Motors Corporation. The study may be significant to enhance the refrigeration efficiency of the system and reduce discharge flow pulsation and noise of vane compressors.