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基于Carreau剪切稀化非牛顿流变模型,针对一种空间用国产氯苯基硅油(CSO)弹流牵曳特性进行了完全数值解,CSO相关流变参数值为拟合实验数据所得.采用球-盘式弹流牵曳试验装置,测定了CSO在不同工况下弹流牵曳系数.将理论与实验结果进行比较表明,随着滑滚比的增大,CSO弹流牵曳系数经历了由急剧增加到缓慢增加,直至逐渐减小的过程.与其他2种润滑油相比,CSO弹流牵曳系数对载荷敏感度低,且在大滑滚比工况下弹流牵曳系数随滚动速度增大而减小.因此,在高速重载工况下,用CSO润滑的空间摩擦学部件寿命更长,动力消耗更低.但是,CSO在宽温度范围内,粘度变化幅度为5个数量级,因此,不适合在低温工况环境下使用.
Based on the Carreau shear-thinning non-Newtonian rheological model, a completely numerical solution of a domestically produced chloropropene-based silicone oil (CSO) was conducted, and the CSO-related rheological parameters were obtained from the fitted experimental data. The ball-plate-type elastic-flow dragging device was used to measure the spring-flow drag coefficient of CSO under different operating conditions. Comparing the theoretical and experimental results, the drag coefficient of the CSO From a sharp increase to a slow increase until it gradually decreases.Compared with the other two lubricating oils, the CSO elastohydrodynamic drag coefficient is less sensitive to the load and the drag coefficient at high slip ratio conditions As the rolling speed increases, the CSO lubricated space tribology components have longer life and lower power consumption under high-speed and heavy-load conditions.However, the CSO has a viscosity change of 5 over a wide temperature range Order of magnitude, therefore, not suitable for use under low temperature conditions.