针对自动同步啮合装置(SSS离合器)啮合引发的不稳定振动现象,以某重燃联合循环机组的振动故障为对象,总结振动规律,分析了啮合角度差对振动的影响和振动突变的原因。建立不平衡力与径向瞬态冲击耦合作用下的轴承-转子动力学模型。研究表明：SSS离合器啮合瞬间，轴颈中心位置会出现突变，说明转轴上受到力的冲击作用。不同啮合状态下冲击力不等。冲击力引发振动突变,振动突变主要表现为低频分量,冲击力越大,突变低频分量越大。转轴系统的稳定性受轴承载荷影响,轴承载荷越大,稳定性越高。减小啮合冲击力与提高轴承载荷是解决啮合冲击引发不稳定振动问题的两个主要措施。

This study addresses the unstable vibration phenomenon triggered by the engagement of the synchro-self-shifting clutch (SSS clutch). Using the vibration malfunction of a specific heavy-duty combined cycle unit as a case study, we summarized the vibration patterns and analyzed the effects of engagement angular discrepancies on vibrations and the causes of abrupt vibration changes. A dynamic bearing-rotor model under the coupled effects of unbalanced forces and radial transient impacts was established. The findings indicate that sudden change in the center of the shaft position occurs when the SSS clutch is engaged, indicating that a force is acting as an impact on the rotating shaft. The impact force varies in different states of engagement. These impact forces cause abrupt vibration changes, mainly manifesting as low-frequency components. The greater the impact force, the larger the low-frequency component deviation. The stability of the shaft system is influenced by bearing loads; the greater the bearing load, the higher the system stability. It was concluded that reducing the engagement impact force and increasing the bearing load are two primary measures to address the unstable vibrations induced by engagement impacts.

TM611.31