JPS6431258U

JPS6431258U -

Info

Publication number: JPS6431258U
Application number: JP12568987U
Authority: JP
Priority date: 1987-08-20
Filing date: 1987-08-20
Publication date: 1989-02-27

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例を示す要部断面図、
第２図は従来構造を概略的に示す要部断面図であ
る。１……ハウジング、２……回転軸、２ａ，２ｂ
……軸、３……フローテイングシート、５……シ
ールリング、９……カラー、１１……ラビリンス
シール、１３……流体注入孔、１４……流体吐出
孔、１５……中空部、１５ａ……バツフルスリー
ブ外周空間、１５ｂ……バツフルスリーブ内周空
間、１６……バツフルスリーブ、１８，１９……
透孔、２０……軸封空間、２０ａ……注入側空間
、２０ｂ……吐出側空間、Ｍ１……上部メカニカ
ルシール、Ｍ２……下部メカニカルシール。 FIG. 1 is a cross-sectional view of essential parts showing an embodiment of the present invention;
FIG. 2 is a sectional view of a main part schematically showing a conventional structure. 1...Housing, 2...Rotating shaft, 2a, 2b
... shaft, 3 ... floating sheet, 5 ... seal ring, 9 ... collar, 11 ... labyrinth seal, 13 ... fluid injection hole, 14 ... fluid discharge hole, 15 ... hollow part, 15a ... ...Boutful sleeve outer circumferential space, 15b...Boutful sleeve inner circumferential space, 16...Boutful sleeve, 18, 19...
Through hole, 20...shaft seal space, 20a...injection side space, 20b...discharge side space, M1...upper mechanical seal, M2...lower mechanical seal.

Claims

[Scope of utility model registration request]

A shaft sealing space that is located between the housing and the rotating shaft inserted into the inner periphery of the housing and is sealed at both ends by two shaft sealing devices arranged in parallel in the axial direction.
The housing is divided into an injection side space and a discharge side space by another contact type or non-contact type sealing mechanism, and the housing includes a fluid injection hole that communicates the injection side space with the outside, and a fluid injection hole that communicates the discharge side space with the outside. A part of the rotating shaft is hollow, and one end of the fluid flow path formed in the hollow part is opened to the injection side space, and the other end is opened to the discharge side space. A cooling mechanism for the rotating shaft in the shaft sealing device mounting part.