JPS58125766U

JPS58125766U - Stern tube seal assembly

Info

Publication number: JPS58125766U
Application number: JP2236582U
Authority: JP
Inventors: 玉真　洋; 小沢　幸男; 宮崎　仁吾; 宏伊藤; 木下　豊弘; 青木　通
Original assignee: 財団法人鉄道総合技術研究所; 日本ド−バ−株式会社
Priority date: 1982-02-19
Filing date: 1982-02-19
Publication date: 1983-08-26
Also published as: JPH034639Y2

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例の断面図、第２図は　・第１
図の実施例に用いた磁石組立体の正面図、第３図はポー
ルリングの変形例を示すもので、ポールリングの内周面
とライナーの外周面の近傍の拡大断面図である。１・・・船尾管、２・・・船尾管シール組立体、３・・
・海水、４・・・潤滑油スペー２ス、５・・・プロペラ
軸、６・・・筒状部材即ちライナー、７・・・ハウジン
グ、８Ａ。８Ｂ・・・磁性流体シール装置、９・・・ポールリング
、１０・・・磁石組立体、１１・・・磁性流体、２０・
・・中間室、２１・・・通路、２３・・・ヘッドタンク
、Ｇ・・・環状ギャップ。Figure 1 is a sectional view of one embodiment of the present invention, and Figure 2 is a 1st
FIG. 3 is a front view of the magnet assembly used in the illustrated embodiment, and shows a modified example of the pole ring, and is an enlarged sectional view of the vicinity of the inner peripheral surface of the pole ring and the outer peripheral surface of the liner. 1... Stern tube, 2... Stern tube seal assembly, 3...
- Seawater, 4... Lubricating oil space 2, 5... Propeller shaft, 6... Cylindrical member or liner, 7... Housing, 8A. 8B... Magnetic fluid sealing device, 9... Pole ring, 10... Magnet assembly, 11... Magnetic fluid, 20...
... Intermediate chamber, 21... Passage, 23... Head tank, G... Annular gap.

Claims

[Scope of utility model registration request]

(1) A stern tube seal assembly disposed between a bearing that pivotally supports the propeller shaft and the seawater, which includes a cylindrical member made of a magnetic material fixedly held on the propeller shaft, a cylindrical member fixedly held on the stern tube, and The cylindrical member has a housing made of a non-magnetic material having a hole passing through the cylindrical member, and a pair of magnetic fluid seal devices held by the housing and spaced apart in the axial direction of the propeller shaft, each magnetic A fluid seal device includes a pair of pole rings that are spaced apart from each other in the axial direction and form a minute annular gap with the outer surface of the cylindrical member, and a magnet assembly that is disposed between the pole rings. and an intermediate chamber formed between the pair of magnetic fluid sealing devices, the magnetic fluid filling the annular gap and acting on the intermediate chamber at both ends of the seal assembly. What is claimed is: 1. A stern tube seal assembly comprising a pressure applying device that applies a pressure approximately intermediate the fluid pressure.

(2) A utility model registration claim in which the pressure applying device contains a lubricating oil therein, is arranged at a predetermined height with respect to the intermediate chamber, and further has a head tank connected to the intermediate chamber. A stern tube seal assembly according to item 1.

(3) The stern tube seal assembly according to claim 2, wherein the head tank is provided with a seawater detection device.

(4) The magnet assembly includes a non-magnetic annular member and a rod-like shape fitted into a plurality of through holes formed at intervals in the circumferential direction of the non-magnetic annular member and extending in the axial direction. The stern tube seal assembly according to claim 1, 2, or 3, which is constructed of a magnet.