JPH0439328U

JPH0439328U -

Info

Publication number: JPH0439328U
Application number: JP1990079209U
Authority: JP
Priority date: 1990-07-27
Filing date: 1990-07-27
Publication date: 1992-04-03

Description

【図面の簡単な説明】[Brief explanation of drawings]

第１図はこの考案の一実施例による流体軸受の
シール装置を流体軸受の下部と共に示す停止時の
縦断面図、第２図は同作動時の部分縦断面図、第
３図はこの考案の他の実施例による流体軸受のシ
ール装置を流体軸受の下部と共に示す停止時の縦
断面図、第４図は同作動時の部分縦断面図、第５
図は第３図に示す実施例による流体軸受のシール
装置の変形例を示す作動時の部分縦断面図である
。１……可動軸、２……軸受部材、２ａ……凹部
、１３……シールリング、１４……操作部材、１
５……シリンダ、１６……ピストン、１７……ば
ね、１８……エア吹付口、１９……シール用エア
供給路、２０……油路、２２……エア吹付口、２
３……エア供給路。 Fig. 1 is a vertical cross-sectional view of a hydrodynamic bearing sealing device according to an embodiment of this invention together with the lower part of the hydrodynamic bearing when it is stopped, Fig. 2 is a partial longitudinal cross-sectional view when the same is in operation, and Fig. 3 is a longitudinal sectional view of the sealing device of the hydrodynamic bearing according to an embodiment of this invention. A vertical cross-sectional view of a fluid bearing sealing device according to another embodiment together with a lower part of the fluid bearing when the fluid bearing is stopped; FIG. 4 is a partial vertical cross-sectional view when the same is in operation;
This figure is a partial vertical sectional view showing a modification of the sealing device for a hydrodynamic bearing according to the embodiment shown in FIG. 3 during operation. DESCRIPTION OF SYMBOLS 1... Movable shaft, 2... Bearing member, 2a... Recessed part, 13... Seal ring, 14... Operation member, 1
5...Cylinder, 16...Piston, 17...Spring, 18...Air blowing port, 19...Sealing air supply path, 20...Oil passage, 22...Air blowing port, 2
3...Air supply path.

補正平２．９．１４実用新案登録請求の範囲を次のように補正する
。Amendment 2.9.14 The scope of claims for utility model registration is amended as follows.

【実用新案登録請求の範囲】可動軸の外周面と、この可動軸が貫通する軸受
部材の端部内周面との間から軸受油が外部に漏れ
るのを防止する流体軸受のシール装置であつて、
前記軸受部材に保持させると共に、流体軸受の停
止時に前記可動軸の外周面に圧接する弾性変形可
能なシールリングと、このシールリングに圧接、
離間可能に対向し流体軸受の作動時に流体圧によ
つて軸方向に移動し前記シールリングを可動軸の
外周面と離間させる操作部材と、この操作部材と
軸受部材との間に介在させ操作部材を流体圧によ
つて移動する方向と反対方向に付勢するばねとを
、前記軸受部材の端部内周面に形成した凹部内に
設けたことを特徴とする流体軸受のシール装置。図面の簡単な説明を次のように補正する。明細書第２０頁第１行の「……部分縦断面図」
の次に下記を挿入する。「、第６図は従来の流体軸受のシール装置を流
体軸受の下部と共に示す縦断面図」。[Claims for Utility Model Registration] A sealing device for a hydrodynamic bearing that prevents bearing oil from leaking to the outside between the outer circumferential surface of a movable shaft and the inner circumferential surface of an end of a bearing member through which the movable shaft passes. ,
an elastically deformable seal ring held by the bearing member and pressed against the outer circumferential surface of the movable shaft when the hydrodynamic bearing is stopped;
an operating member that is separably opposed and moves in the axial direction by fluid pressure during operation of the hydrodynamic bearing to separate the seal ring from the outer peripheral surface of the movable shaft; and an operating member that is interposed between the operating member and the bearing member. 1. A sealing device for a hydrodynamic bearing, characterized in that a spring is provided in a recess formed in an inner circumferential surface of an end of the bearing member, the spring biasing the bearing member in a direction opposite to the direction in which the bearing member is moved by fluid pressure. The brief description of the drawing has been amended as follows. "...partial longitudinal sectional view" on page 20, line 1 of the specification
Insert the following after . ``, FIG. 6 is a vertical cross-sectional view showing a conventional sealing device for a hydrodynamic bearing together with the lower part of the hydrodynamic bearing.''

Claims

【実用新案登録請求の範囲】[Scope of utility model registration request]

可動軸の外周面と、この可動軸が貫通する軸受
部材の端部内周面との間から軸受油が外部に漏れ
るのを防止する流体軸受のシール装置であつて、
前記軸受部材に保持させると共に、流体軸受の停
止時に前記可動軸の外周面に圧接する弾性変形可
能なシーリングと、このシーリングに圧接、離間
可能に対向し流体軸受の作動時に流体圧によつて
軸方向に移動し前記シーリングを可動軸の外周面
と離間させる操作部材と、この操作部材と軸受部
材との間に介在させ操作部材を流体圧によつて移
動する方向と反対方向に付勢するばねとを、前記
軸受部材の端部内周面に形成した凹部内に設けた
ことを特徴とする流体軸受のシール装置。 A sealing device for a hydrodynamic bearing that prevents bearing oil from leaking to the outside between the outer circumferential surface of a movable shaft and the inner circumferential surface of an end portion of a bearing member through which the movable shaft passes,
an elastically deformable seal that is held by the bearing member and presses against the outer peripheral surface of the movable shaft when the hydrodynamic bearing is stopped; an operating member that moves in a direction to separate the sealing from the outer peripheral surface of the movable shaft, and a spring that is interposed between the operating member and the bearing member and biases the operating member in a direction opposite to the direction in which the operating member is moved by fluid pressure. A sealing device for a hydrodynamic bearing, characterized in that: is provided in a recess formed in an inner peripheral surface of an end portion of the bearing member.