JPS6457422U

JPS6457422U -

Info

Publication number: JPS6457422U
Application number: JP15165887U
Authority: JP
Priority date: 1987-10-05
Filing date: 1987-10-05
Publication date: 1989-04-10
Anticipated expiration: 2002-10-05
Also published as: JPH0615176Y2

Description

[Brief explanation of the drawing]

第１図は本考案の第一実施例装置を示す縦断面
図、第２図は本考案の第二実施例装置を示す縦断
面図、第３図は本考案の第三実施例装置を示す縦
断面図である。１……非回転体（ハウジング）、２……ころが
り軸受、３……回転体（主軸）、８……狭間隙、
９；３９……環状部材、１０……気体受入口、１
１；３１……環状室、１２……多孔質リング、１
５……ベローズ、３５……Ｏリング。 Fig. 1 is a vertical cross-sectional view showing a device according to a first embodiment of the present invention, Fig. 2 is a longitudinal cross-sectional view showing a device according to a second embodiment of the present invention, and Fig. 3 is a longitudinal cross-sectional view showing a device according to a third embodiment of the present invention. FIG. 1... Non-rotating body (housing), 2... Rolling bearing, 3... Rotating body (main shaft), 8... Narrow gap,
9; 39... annular member, 10... gas intake port, 1
1; 31... annular chamber, 12... porous ring, 1
5...Bellows, 35...O-ring.

Claims

[Claims for Utility Model Registration] (1) In a device that seals an annular space between a non-rotating body and a rotating body supported by the non-rotating body via a rolling bearing from an external space, a seal from the outside. An annular member is provided on the non-rotating body side, the annular member having an annular chamber formed therein and communicating with the gas inlet for receiving the gas for use and opening radially inward, the annular member having an inner diameter of the annular member. A porous ring, which is set smaller than the inner diameter of the rotating body and forms a narrow gap between the ring and the rotating body, closes the opening of the annular chamber of the annular member and is movable in the radial direction. Gas seal device. (2) Utility model registration claim No. 1, characterized in that the porous ring is attached to the annular member by a member having elasticity in the radial direction, such as a bellows.
The gas seal device described in (1). (3) Utility model registration claim 1, characterized in that the porous ring forms narrow gaps with the rotating body at at least two positions spaced apart in the axial direction.
The gas seal device described in (2). (4) The gas according to claim (1) of the utility model registration claim, wherein the porous ring is movably guided in the radial direction by an O-ring provided on the inner wall of the annular chamber. sealing device.