JPS5935773U - sealing device - Google Patents

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) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

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

第１図は従来の密封装置の例を示す断面図ζ第２図は本
考案の一例を示す断面図、第３図及び第４図は夫々本考
案の他の例を示す断面図である。 １・・・環状磁石、２ａ、　２ｂ、　５ａ、　５ｂ、　
３ａ。 ８ｂ・・・環状継鉄、３ａ、　　３ｂ・・・磁性流体、
４・・・回転軸、５ａ、　　５ｂ、　　７ａ、　　７ｂ
−突出部。FIG. 1 is a cross-sectional view showing an example of a conventional sealing device. FIG. 2 is a cross-sectional view showing an example of the present invention, and FIGS. 3 and 4 are cross-sectional views showing other examples of the present invention. 1... Annular magnet, 2a, 2b, 5a, 5b,
3a. 8b...Annular yoke, 3a, 3b...Magnetic fluid,
4... Rotating shaft, 5a, 5b, 7a, 7b
-Protrusions.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 軟磁性材より成る回転軸と、該回転軸が配設された環状
磁石と、該磁石の両側に該磁石の内径より小さい内径を
有する軟磁性材より成る環状継鉄と、上記回転軸と上記
環状継鉄との間隙に磁性流体が介在された密封装置にお
いて、上記継鉄の内径面が上記回転軸に平行で互いの継
鉄側に突出させた突出部を設け、該突出部と上記回転軸
との間に上記磁性流体を捕捉せしめたことを特徴とする
密封装置。a rotating shaft made of a soft magnetic material; an annular magnet on which the rotating shaft is disposed; an annular yoke made of a soft magnetic material having an inner diameter smaller than the inner diameter of the magnet on both sides of the magnet; In a sealing device in which a magnetic fluid is interposed in a gap with an annular yoke, a protrusion is provided such that the inner diameter surface of the yoke is parallel to the rotation axis and protrudes toward the yoke side, and the protrusion and the rotation A sealing device characterized in that the magnetic fluid is captured between the shaft and the shaft.