Bearings
AssigneeNational Research Development Corporation
InventorMohamed E. Mohsin
Life of this patent
Estimating the term…
Abstract
A hydrostatic bearing with structural features to improve the harmony between hydrostatic and hydrodynamic forces set up in the bearing fluid, and to diminish the harmful effects of hydrodynamic forces when there is relative motion between the bearing members. These features may comprise channels in the bearing land to maintain transverse hydrostatic fluid flow beneath the land despite longitudinal dynamic forces, longitudinal channels in the bearing surfaces to diminish dynamic friction without unduly diminishing the resistance to hydrostatic fluid flow across these channels, and means to guide fluid recirculation within the bearing recess so as to avoid shearing contact between oppositely-moving streams of fluid within it.
Claims17
A hydrostatic bearing comprising:
- two co-operating bearing members;
- a bearing recess formed in one of said members;
- a land surrounding said recess;
- channels formed at least in said land located at the forward end of said recess;
- said channels being of first and second kinds, each being open at one end lying parallel to the direction of relative motion of the two said members;
- said channels running in opposite direction so that the said open ends of said first channels communicate with said recess and the said open ends of said second channels communicate with a zone of ambient pressure;
- an overlap region between said first and second channels whereby fluid may travel from said first channels to said second channels by a generally transverse path.
A hydrostatic bearing comprising:
- first and second cooperating bearing members;
- two confronting surfaces, presented respectively by said first member and said second member;
- said confronting surfaces being adapted in use to be held apart by a film of fluid moving under hydrostatic force;
- said members being adapted to move relative to each other in a predetermined direction so that said movement in use by said film of fluid is transverse relative to said predetermined direction across at least parts of said confronting surfaces;
- and
- channels, aligned with said predetermined direction, formed in at least said parts of at least one of said confronting surfaces;
- and comprising a recess formed in the said first of said cooperating bearing members and supplied in use with fluid under hydrostatic pressure, whereby in use said film of fluid issues from said recess, and comprising guide means cooperating with said recess whereby circulatory movement of said fluid within said recess due to friction from said confronting surface of said second cooperating bearing member is conducted in a manner which avoids substantial direct contact between adjacent streams of said fluid moving in opposite directions.
Dependencies are inferred from the claim text.