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为解决某超高速转子系统的失稳碰摩问题,以干摩擦阻尼耗散转子涡动能量理论为依据,采用一种自由安装式干摩擦片减振结构(干摩擦阻尼器).该结构在转轴上安装波形弹性垫片及干摩擦片,通过螺母预紧力矩向波形弹性垫片及各干摩擦片提供轴向正压力.干摩擦片随转子振动并产生相对运动,从而耗散转子涡动能量,达到减振、增强转子稳定性的目的.通过实验不同数量的干摩擦片和不同预紧力矩的组合寻找满足工程稳定性的减振器结构参数.结果表明:干摩擦阻尼器适用于高速、轻载转子系统的减振、增稳,可以有效降低转子振动,控制转子涡动发散的趋势;所用实验方法有助于快速获得满足工程稳定性的减振结构参数.
In order to solve the problem of instability and rubbing of an ultra-high-speed rotor system, a free-mounted dry friction plate damping structure (dry friction damper) is adopted based on the theory of dry friction damping dissipative rotor’s swirl energy. The shaft is provided with a wave-shaped elastic washer and a dry friction plate, which provide axial positive pressure to the corrugated elastic washer and each dry friction plate through the pre-tightening torque of the nut. The dry friction plate vibrates with the rotor and generates relative motion, Energy to achieve the purpose of reducing vibration and enhancing the stability of the rotor.The structural parameters of the shock absorber satisfying the engineering stability are sought through experiments with different numbers of dry friction plates and different combinations of prestressing moments.The results show that the dry friction damper is suitable for high speed The vibration reduction and stabilization of the light-load rotor system can effectively reduce the rotor vibration and control the tendency of the rotor to diverge. The experimental method is helpful to quickly obtain the damping structure parameters that satisfy the engineering stability.