主动控制可倾瓦轴承-转子系统动态性能仿真研究

Research on Simulation of Dynamic Performance of Active Control Tilting Pad Bearing-rotor System

为了主动控制径向滑动轴承转子系统的振动性能,提出了调节径向滑动轴承可倾轴瓦的径向位移及周向角度的方法来实现主动控制,开展主动控制可倾瓦轴承-转子系统动态性能理论仿真研究,以掌握该主动控制方法对轴承转子系统振动特性的影响规律。建立了不同径向位移和周向角度的可倾瓦轴承静动特性以及转子系统轴心轨迹理论计算方法,在控制不同可倾瓦径向位移及周向角度的情况下分析轴承的静动态性能,并对其轴心轨迹进行分析。理论研究结果表明,增加对轴瓦径向位移和周向角度的控制量可以有效减小转子轴颈振幅,提高轴承-转子系统的运行稳定性,为可倾瓦轴承-转子系统实现主动控制奠定了理论基础。

In order to actively control the vibration performance of the radial journal bearing-rotor system,this paper pro-poses a method to adjust the radial displacement and circumferential angle of the tilting pad of the radial journal bearing to realize the active control.The theoretical simulation research on the dynamic performance of the active control tilting pad bearing-rotor system is carried out to master the influence of the active control method on the vibration characteristics of the bearing rotor system.In this paper,the calculation methods of static and dynamic characteristics of tilting pad bearing with different radial displacements and circumferential angles,and the theoretical calculation methods of axial trajectory of ro-tor system are established.The static and dynamic performance of bearing are analyzed under the control of different radial displacements and circumferential angles of tilting pads,and the axial trajectory of rotor system are analyzed. The theoretical research results show that increasing the control amount of the radial displacement and circumferential angle of the bearing pad can effectively reduce the amplitude of the rotor journal and improve the operation stability of the bearing-rotor system,which lays a theoretical foundation for the active control of the tilting pad bearing-rotor system.