JPS6412927U

JPS6412927U -

Info

Publication number: JPS6412927U
Application number: JP10381087U
Authority: JP
Priority date: 1987-07-08
Filing date: 1987-07-08
Publication date: 1989-01-24

Description

[Brief explanation of the drawing]

第１図イ及び第２図ハは本考案に関する好適な
実施例を示す断面図である。第１図ロ及び第２図
ニはスラスト軸受面の平面図である。第３図ホは
流体軸受装置の従来例の断面図である。第３図ヘ
は第３図ホに示すスラスト軸受面の平面図である
。主要部の符号の説明、５０はハウジング、５１
は軸、６３，６４はスラスト軸受面、６５，６６
はスラスト受面、５５，５６は軸方向隙間、６１
，６２は動圧発生用溝、７４，７５は段差である
。 FIG. 1A and FIG. 2C are cross-sectional views showing preferred embodiments of the present invention. FIG. 1B and FIG. 2D are plan views of the thrust bearing surface. FIG. 3E is a sectional view of a conventional example of a hydrodynamic bearing device. FIG. 3F is a plan view of the thrust bearing surface shown in FIG. 3E. Explanation of symbols of main parts, 50 is housing, 51
is the shaft, 63, 64 are the thrust bearing surfaces, 65, 66
is the thrust bearing surface, 55 and 56 are the axial clearances, and 61
, 62 are grooves for generating dynamic pressure, and 74 and 75 are steps.

Claims

[Claims for Utility Model Registration] 1. A cylindrical shaft, a hollow cylindrical housing surrounding the shaft, and a radial shaft integrally attached to both ends of the housing or to opposing parts of the shaft opposite to both ends of the housing. a flange extending to;
The pressure generated by the fluid that exists in the close radial gap between a pair of flanges separated in the axial direction and between the inner surface of the housing and the outer diameter surface of the shaft supports the radial load, and the inner surface of the flanges In a hydrodynamic bearing device in which a thrust load is supported by the pressure generated by a fluid existing in a close axial clearance between a thrust bearing surface provided on the housing and a thrust bearing surface provided on the shaft or the housing facing the thrust bearing surface,
A hydrodynamic bearing device characterized in that at least one of the pair of axial gaps is narrower at an inner circumference than at an outer circumference. 2. The hydrodynamic bearing device according to claim 1, wherein the thrust bearing surface is formed into a tapered shape. 3. The hydrodynamic bearing device according to claim 1, which is a registered utility model, wherein a step is provided on the inner circumference of the thrust bearing surface to protrude in the direction of the thrust bearing surface. 4. A hydrodynamic bearing device according to any one of claims 1 to 3, which uses a hydrodynamic groove bearing as a hydrodynamic bearing. 5. The hydrodynamic bearing device according to claim 4, which uses a magnetic fluid seal yoke as a thrust bearing surface.