4106航空润滑油拖动特性研究

采用高速球-盘式拖动力试验装置测定了4106航空润滑油在不同载荷、滚动速度、入口油温及滑滚比下的拖动系数,分析了润滑油的拖动特性,建立了拖动系数的简单计算公式.结果表明:4106航空润滑油的拖动系数随着载荷变化出现转折;在高速和高压条件下,4106航空润滑油呈现非牛顿特性;当入口油温较低时润滑油的热效应较显著;随着载荷增大,入口油温和滚动速度对拖动系数的影响减小;理论计算结果同实测值吻合良好.

Traction Behavior of 4106 Aviation Lubricating Oil

The traction coefficients of 4106 aviation lubricating oil were measured at various normal loads, rolling speeds, lubricant inlet temperatures, and slide to roll ratios, on a ball disk traction rig. The traction behavior of the oil was analyzed and a new formula to calculate the traction coefficient was established. It was found that the tested oil showed significant non Newtonian characteristics and there existed a critical normal load at which the traction coefficient assumed a transition with increasing normal load. The thermal effects in the contact zone became more prominent at a relatively lower lubricant oil inlet temperature. The higher the normal load, the smaller the effect of the lubricating oil inlet temperature and rolling speed on the traction coefficient. Moreover, the prediction results based on the established formula agreed well with the experimental ones. Thus the establish formula could be applied to guide the dynamics design of rolling bearings.