空调压缩机转子系统动力学特性分析

Dynamics analysis of air conditioner compressor rotor system

空调压缩机运行过程中,压缩机转子系统旋转产生的振动通过管路传递到钣金结构件上面,引起空调结构振动噪声。本文通过有限元法对压缩机转子系统进行动力学分析,利用弹性力学有限元建立压缩机转子系统动力学方程;建立基于少自由度有限元法的压缩机转子系统动力学模型,采用New-mark数值积分法和有限元软件对压缩机转子系统固有特性进行分析,有限元分析解与数值分析解前三阶临界转速数值误差控制在5%以内,从而验证了所建立的压缩机转子系统动力学模型的正确性;采用New-mark数值积分法分析了不同偏心状态下的压缩机转子系统不平衡响应情况,分析结果表明转子系统中偏心量与响应幅值呈线性关系。

Dnring the operation of the air conditioner compressor the vibration generated by the rotation of the compressor rotor system through the pipeline to the structural member, causing vibration ~utd noise of the air conditioning structure, In this article, Dynamic analysis of compressor rotor system by finite element method, using elasticity t^nite element method to establish the Dynamic equations of compressor rotor system： based on the finite element method with lew degrees of freedom to establish the Dynamic model of compressor rotor system, analysis of the compressor rotor system inherent characteristics using New-mark numerical integration method and ANSYS software, the finite element analysis solution and the numerical analysis solution control the numerical error of the first three critical speeds within 5%. lhus verifying the correctness of the established compressor rotor system dynamics model. The unbalance respon~ of the compressor rotor system under different eccentric states is analyzed by New-mark numerical integration method. The analysis results show that the eccentricity and the response amplitude are linear in the rotor system.