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选用镀Cr膜的玻璃盘和GCr15球作为摩擦副,在NGY-6纳米润滑膜测量仪上开展球-盘点接触摩擦副在润滑状态下的低速轻载滑滚特性试验,研究不同接触应力、钢球转速、滑滚比等参数对摩擦副的摩擦系数及对应油膜厚度的影响规律.结果表明:当接触应力和钢球转速一定时,摩擦系数随滑滚比的增大逐渐增加后达到稳定状态,当滑滚比较大时,滑滚比的变化对油膜厚度几乎没有影响;当滑滚比一定时,摩擦系数随接触应力的增大逐渐增大,随钢球转速的增大逐渐减小,油膜厚度随接触应力的增大逐渐减小,随钢球转速的增大逐渐增大.摩擦副在弹流润滑状态下,摩擦系数的增加幅度随接触应力的变化较小,而在薄膜润滑状态下,其增加幅度变大.摩擦副在薄膜润滑状态下,当滑滚比在0.10~0.50变化时,摩擦系数和油膜厚度基本处于稳定状态.
The glass disk with Cr film and GCr15 ball were chosen as the friction pair. The low-speed light-load and low-temperature sliding characteristics of ball-inventory contact friction pair under lubrication condition were tested on NGY-6 nano-lubricant film measuring instrument. The results show that when the contact stress and the ball speed are constant, the friction coefficient increases gradually with the increase of the sliding-roll ratio, and then reaches the steady state When the slip ratio is relatively large, the change of the slip ratio has almost no effect on the film thickness. When the slip ratio is constant, the friction coefficient increases with the increase of the contact stress and decreases with the increase of the ball speed. The thickness of the oil film decreases with the increase of contact stress and increases with the increase of the ball speed.The friction coefficient increase with the contact stress is less in the condition of the elastohydrodynamic lubrication, Under the condition of film lubrication, the friction coefficient and oil film thickness are basically stable when the slip ratio changes from 0.10 to 0.50.