Question

Why hydrodynamic bearing is called self acting bearing?

Answer 1

Heya here is ur answer :------

Self-acting bearings are a class of bearings where rotation of the journal sitting in an eccentric position, with respect to the stationary boundary (cylindrical bushing or flat member), is generating a pressure field in the thin fluid-film layer lying therein and this creating a load supporting mechanism. Self -acting bearings are also called hydrodynamic bearings, or thin-film bearings. A journal bearing is a bearing composed of a shaft operating inside a stationary, or rotatin oscillating sleeve (or bushing). In rotating machinery, such as the ones used in automotive, pump or turbine (gas or steam) industries the sleeve is mounted in a housing .

Answer 2

A thrust bearing Carries a load predominately as a axial load through its bearing assembly and a Journal bearing consists of Journal or plain bearings on a shaft or journal which rotates freely in a supporting metal sleeve or shell. There are no rolling elements in style these bearings. Hence less friction and wear.