空间运动部件液体润滑加速寿命试验可行性分析

空间运动部件是航天器及其有效载荷的关键部件,液体润滑已在其中得到广泛应用,而液体润滑的失效机制和寿命分析是目前关注的问题。加速寿命试验是用加大试验应力的方法来缩减试验周期的一种试验方法,这可使得在短时间内对高可靠性长寿命的可靠性评定成为可能。讨论了油润滑条件下对航天运动部件的加速寿命试验的可行性、原则和方法,指出在油润滑中,在保证润滑状态不变的情况下,选择温度、转速为加速应力是可行的。

The Feasibility Analysis on the Accelerated Life Test of Liquid Lubricated Space Mechanical Moving Components

Liquid lubrication is widely used in the space mechanical moving components,which are the important parts of spacecrafts or scanning earth sensors.In order to study the failure mode of liquid lubricant and to evaluate the mechanical system reliability,the accelerated life test (ALT) is developed to accelerate failure by improving the test stresses.The feasibility, the principle and methods in the ALT of space mechanical moving components using liquid lubricant were discussed.It is pointed out that selecting temperature and rotation speed as accelerating stresses of ALT is feasible when using liquid lubricant and assuring constant lubrication condition.