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以某W型压缩机的曲轴-滚动轴承系统为研究对象,利用动力学仿真软件ADAMS研究了压缩机从启动直至达到稳定转速这一动态过程的动力学行为。首先根据电动机的机械特性得到曲轴受到的转矩与转速间的关系曲线;再利用Hertz公式和超静定问题的解法(力法)推导出滚动轴承受力与变形关系的计算公式并得到数值解;最后分别在ADAMS中建立电动机-刚性曲轴-滚动轴承耦合系统动力学仿真模型和电动机-柔性曲轴-滚动轴承耦合系统动力学仿真模型,分别仿真求解并得到相应的动力学响应。所得到的结论对提高压缩机的动力学性能具有指导意义。
Taking the crankshaft-rolling bearing system of a W-type compressor as the research object, the dynamic behavior of the compressor during its dynamic process from start-up to steady-state speed was studied by the software ADAMS. Firstly, according to the mechanical characteristics of the motor, the relationship between the torque and the rotational speed of the crankshaft is obtained. Then, the formula of the relationship between the bearing capacity and the deformation of the rolling bearing is deduced by the Hertz formula and the solution of the statics (method) Finally, dynamic simulation model of motor - rigid crankshaft - rolling bearing coupling system and dynamic simulation model of motor - flexible crankshaft - rolling bearing coupling system are established respectively in ADAMS. The corresponding dynamic responses are obtained by simulation respectively. The conclusions obtained are of guiding significance to improve the dynamic performance of the compressor.