JPS63157520U

JPS63157520U -

Info

Publication number: JPS63157520U
Application number: JP5025187U
Authority: JP
Priority date: 1987-04-01
Filing date: 1987-04-01
Publication date: 1988-10-17

Description

[Brief explanation of drawings]

第１図ないし第８図はこの考案の実施例を示す
図であつて、第１図は静止部材と可動部材の共働
軸受面が円筒面である動圧発生溝付き流体軸受の
縦断面図、第２図は第１図の共働軸受面における
潤滑剤の圧力膜の形成状態を示す要部拡大断面図
、第３図は静止部材と可動部材の共働軸受面が半
球面である動圧発生溝付き流体軸受の縦断面図、
第４図は静止部材と可動部材の共働軸受面が円す
い面をなす動圧発生溝付き流体軸受の縦断面図、
第５図は静止部材と可動部材の共働軸受面が平面
をなす動圧発生溝付き流体軸受の縦断面図、第６
図は第１図の変形実施例の縦断面図、第７図は従
来の動圧発生溝付き流体軸受の縦断面図、第８図
は第７図の実施例の共働軸受面における潤滑剤の
圧力膜の形成状態を示す要部拡大断面図である。１１，２１，３１，４１……静止部材、１２，
２２，３２，４２……可動部材、１３，２３，３
３，４３……共動軸受面、１４，２４，３４，４
４……動圧発生溝、１５，２５，３５，４５……
流体潤滑剤。 1 to 8 are views showing an embodiment of this invention, and FIG. 1 is a longitudinal cross-sectional view of a hydrodynamic bearing with a hydrodynamic pressure generating groove in which the cooperating bearing surfaces of the stationary member and the movable member are cylindrical surfaces. , Fig. 2 is an enlarged sectional view of the main part showing the state of formation of a pressure film of lubricant on the cooperating bearing surface of Fig. 1, and Fig. 3 is an enlarged sectional view of a main part showing the state of formation of a pressure film of lubricant on the cooperating bearing surface of Fig. 1. Vertical sectional view of a fluid bearing with pressure generating grooves,
FIG. 4 is a longitudinal sectional view of a hydrodynamic bearing with a dynamic pressure generating groove in which the cooperating bearing surfaces of the stationary member and the movable member form a conical surface;
Fig. 5 is a longitudinal sectional view of a hydrodynamic bearing with a hydrodynamic pressure generating groove in which cooperating bearing surfaces of a stationary member and a movable member form a plane;
The figure is a longitudinal sectional view of a modified embodiment of Fig. 1, Fig. 7 is a longitudinal sectional view of a conventional fluid bearing with hydrodynamic pressure generating grooves, and Fig. 8 is a lubricant on the cooperating bearing surface of the embodiment of Fig. 7. FIG. 2 is an enlarged cross-sectional view of a main part showing a state of formation of a pressure film. 11, 21, 31, 41... stationary member, 12,
22, 32, 42...Movable member, 13, 23, 3
3, 43... Cooperative bearing surface, 14, 24, 34, 4
4...Dynamic pressure generating groove, 15, 25, 35, 45...
Fluid lubricant.

Claims

[Scope of utility model registration request]

In a fluid bearing in which a dynamic pressure generating groove is provided on either one of the cooperating bearing surfaces of a stationary member and a movable member, the dynamic pressure generating groove is a portion where the pressure distribution is maximum in the area where the dynamic pressure generating groove is formed. A hydrodynamic bearing with hydrodynamic pressure generating grooves, which is shallow in the area and deepens as it goes away from the area where the pressure distribution is maximum.