Requirements for supporting a lubricating medium

Requirements for supporting a lubricating medium

The requirements for supporting a lubricating medium can be calculated according to the law of friction.

Summary of friction law

In addition to rolling friction, which is not discussed here, friction can be divided into:

A) Adhesive friction (same as static friction);

B) Sliding friction.

In the case of adhesion friction and sliding friction, the following relationship exists:

Ｔ＝N·μ where

N——Normal force;

T——tangential force;

μ——coefficient of friction;

The friction coefficient μ is a material constant, which is related to the surface properties of the sliding surface and the sliding object, but does not depend on the size of the contact area F. In the case of adhesion friction, the coefficient μ of infinite steel is generally greater than the value of sliding friction, because in the case of adhesion friction, the surface will be "wedge tight" due to the often existing unevenness.