JPH026816U

JPH026816U -

Info

Publication number: JPH026816U
Application number: JP8532988U
Authority: JP
Priority date: 1988-06-28
Filing date: 1988-06-28
Publication date: 1990-01-17

Description

[Brief explanation of the drawing]

第１Ａ図は本考案による回転機器の流体動圧軸
受装置の第一実施例を示す断面図、第１Ｂ図はそ
のスラスト軸受を示す底面図、第１Ｃ図は第１Ａ
図のラジアル軸受を示す底面図、第２Ａ図は本考
案による回転機器の流体動圧軸受装置の第二実施
例を示す断面図、第２Ｂ図はその軸受をＢ―Ｂ線
方向から示す一部を断面とする平面図、第２Ｃ図
は第２Ａ図の軸受をＣ―Ｃ線方向から示す一部を
断面とする底面図、第３Ａ図は本考案による回転
機器の流体動圧軸受装置の第三実施例を示す断面
図、第３Ｂ図はその軸受に固定されたフランジを
Ｂ―Ｂ線方向から示す一部を断面とする底面図、
第３Ｃ図は第３Ａ図の軸受の底部をＣ―Ｃ線方向
から示す一部を断面とする底面図、第４図はＶＴ
Ｒ用の回転ヘツド装置の一例を示す断面図、第５
Ａ図は従来の流体動圧軸受装置を簡略化して示す
断面図、第５Ｂ図はそのスラスト軸受を示す底面
図である。２１，２６，３１……固定軸、２１ａ，２１ｂ
，２３，２６ａ，２６ｂ，２８，２９，３１ａ，
３１ｂ，３４，３５……動圧発生溝、２２……ラ
ジアル軸受、２２ａ……ラジアル軸受の底面、２
７，３２……軸受、２７ａ，３２ａ……ラジアル
軸受部、２７ｂ……スラスト軸受部、２７ｃ，３
２ｃ……底部、３３……フランジ、Ｒ……流体、
Ｐ，Ｑ……折線部。 FIG. 1A is a sectional view showing a first embodiment of a fluid dynamic pressure bearing device for rotating equipment according to the present invention, FIG. 1B is a bottom view showing the thrust bearing, and FIG.
Fig. 2A is a sectional view showing a second embodiment of the fluid dynamic pressure bearing device for rotating equipment according to the present invention, and Fig. 2B is a part of the bearing shown from the direction of line B-B. FIG. 2C is a partially sectional bottom view of the bearing shown in FIG. 2A taken along line C--C, and FIG. 3A is a partial cross-sectional bottom view of the bearing shown in FIG. 2A. 3B is a cross-sectional view showing the flange fixed to the bearing from the direction of line B-B;
Figure 3C is a partially sectional bottom view of the bottom of the bearing in Figure 3A taken along line C--C, and Figure 4 is VT.
Sectional view showing an example of a rotary head device for R, No. 5
Figure A is a simplified sectional view of a conventional fluid dynamic bearing device, and Figure 5B is a bottom view of the thrust bearing. 21, 26, 31...Fixed shaft, 21a, 21b
, 23, 26a, 26b, 28, 29, 31a,
31b, 34, 35...Dynamic pressure generating groove, 22...Radial bearing, 22a...Bottom surface of radial bearing, 2
7, 32... Bearing, 27a, 32a... Radial bearing part, 27b... Thrust bearing part, 27c, 3
2c...bottom, 33...flange, R...fluid,
P, Q... Broken line part.

Claims

[Scope of utility model registration request]

A fluid is interposed between the shaft and a bearing fitted onto the shaft with a minute interval, and at least one of the outer circumferential surface of the shaft and the inner circumferential surface of the bearing is radially radially disposed by rotational force. In a fluid dynamic pressure bearing device for a rotating equipment, in which a dynamic pressure generating groove for generating fluid dynamic pressure in a direction is formed at least two places, the shaft, a member fixed thereto, and the bearing are opposed to each other in the thrust direction. 1. A fluid dynamic pressure bearing device for a rotating equipment, characterized in that a dynamic pressure generating groove is formed on at least a part of a surface of the rotary device, the dynamic pressure generating groove guiding a flow of fluid in the direction of the dynamic pressure generating groove.