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Friction

Friction Torque in Collar Bearings

Description

Collar bearings support axial loads on rotating shafts, and their friction helps determine the torque needed to start motion. They are used in many machines and may have a single collar or multiple collars, depending on the application and load needs.

For a single collar bearing under an axial lo...

Transcript

轴套轴承是一种用于机器中支撑旋转轴上轴向载荷的轴承,可具有单个或多个轴套。

考虑一个承受轴向载荷的单个止推轴瓦。轴瓦外半径与内半径之间的区域即为总轴承接触面积。

假设轴承受力均匀,则均匀法向压强可表示为作用力与轴承面积之比。

考虑轴承上的一个无穷小面积微元。作用在该微元面积上的力可以表示为摩擦系数、压力与微元面积的乘积。

通过绕旋转轴的力矩平衡方程,确定使轴开始转动所需的力矩。

接下来,通过积分计算克服所有摩擦力所需的施加力矩。

最后,代入微分力和微分面积的值,并在整个轴承面积上对公式进行积分,即可估算出轴的力矩。