若两摩擦表面间有充足的润滑油,而且能满足一定的条件,则在两摩擦面间可形成厚度为几十微米的压力油膜。它能将相对运动着的两金属表面分隔开。此时,只有液体之间的摩擦,称为液体摩擦,又称为液体润滑。 换言之,形成的压力油膜可以将重物托起,使其浮在油膜之上。由于两摩擦表面被油隔开而不直接接触,摩擦系数很小(f≈0.001-0.01),所以显著减少了摩擦和磨损。
计算结果表明,压力高和液体流量大的体系,其摩擦阻力系数和表观粘度值均较高。
The calculation results showed that the friction factor and apparent viscosity of hydrate slurries increase with increasing pressure and flow rate.
液体的粘度反映了介质流动的难易程度,粘度过高会增加内摩擦阻力,降低输出功率,浪费能量,并产生过高的系统温度。
The viscosity of the liquid medium reflects the ease of mobility, high viscosity, friction will increase, reducing output power, a waste of energy and have a high temperature.
粘性是液体流层问相对运动而产生的摩擦力或阻力。油层间所产生的运动阻力称为粘性摩擦力。
Viscous friction is the fiction, or resistance to relative motion, between adjacent layers of liquid. The resistance of motion between these oil layers is called viscous friction.
应用推荐