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对旋转圆盘式快门机构的加速寿命试验进行设计,以固体润滑轴承为重点研究对象,分析影响轴承寿命的因素,把转速作为加速应力。分析机构加速后,轴系动不平衡量带来的动载荷对轴承最大接触应力的影响,建立正常工作寿命和加速寿命的等效关系。分析认为经过动平衡处理后,动载荷对轴承接触应力的影响很小,轴承受力环境没有发生很大变化,可以通过提高转速,加大润滑膜单位时间的磨损次数,来达到加速寿命试验的目的。
The design of accelerated life test of rotating disc shutter mechanism is carried out. The solid lubricated bearing is the main research object. The factors affecting the bearing life are analyzed, and the rotating speed is taken as the acceleration stress. The influence of the dynamic load caused by dynamic unbalance of shaft system on the maximum contact stress of bearing is analyzed after the mechanism is accelerated, and the equivalent relationship between normal working life and accelerated life is established. The analysis shows that after the dynamic equilibrium treatment, the dynamic load has little influence on the bearing contact stress, the bearing stress environment has not changed greatly, and the accelerated life test can be achieved by increasing the rotation speed and increasing the wear frequency per unit time of the lubricating film purpose.