变转速下涡旋压缩机转子系统不平衡瞬态响应分析

Transient Unbalanced Response Analysis of Rotor System of Scroll Compressor under Variable Speed

基于ANSYS Workbench软件对某卧式涡旋压缩机转子系统三维模型模态分析,获取转子系统前六阶模态的固有频率、振型以及临界转速;应用瞬态不平衡响应分析法对该转子系统在变转速工况下(尤其启动时)运行、不平衡质量产生离心力的变化问题进行分析。分析结果表明:临界转速在工作转速0~6000 r/min范围内没有出现转子系统最大变形出现位于平衡铁外边缘处,变形量为3.8698e-3 mm。依据旋转机械标准振动评价等级ISO-10816,转子系统振动状态良好,工作平稳运行。

Based on ANSYS Workbench software,the modal analysis of the three-dimensional model for a horizontal scroll compressor rotor system is carried out,and the natural frequency,vibration modes and critical speed of the first six modes of rotor system are obtained.The transient unbalance response analysis method is applied to the rotor system under variable speed conditions(especially at start-up),the problem of centrifugal force changes caused by unbalanced masses is analyzed.The analysis results show that the critical speed does not appear in the range of 0~6000 r/min.The maximum deformation of rotor system occurs at the outer edge of balance iron,and the deformation is 3.8698e-3 mm.According to the vibration evaluation level specifiedin ISO 10816,the rotor system is in good vibration state and runs smoothly.