JPH0414865U - - Google Patents
Info
- Publication number
- JPH0414865U JPH0414865U JP5753990U JP5753990U JPH0414865U JP H0414865 U JPH0414865 U JP H0414865U JP 5753990 U JP5753990 U JP 5753990U JP 5753990 U JP5753990 U JP 5753990U JP H0414865 U JPH0414865 U JP H0414865U
- Authority
- JP
- Japan
- Prior art keywords
- permanent magnet
- yoke
- shaft
- magnetic fluid
- magnetic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000011553 magnetic fluid Substances 0.000 claims description 7
- 238000007789 sealing Methods 0.000 claims description 3
- 239000000696 magnetic material Substances 0.000 claims 1
Landscapes
- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
Description
第１図は、本考案の一実施類を示す磁性流体シ
ール装置の側面断面図。第２図は、第１図におけ
る主要部の拡大断面図。第３図は、従来の例を示
す磁性流体シール装置の側面断面図である。
１，１１……永久磁石、２，１２……ヨーク、
３，１３……シヤフト、４，１４……フランジ、
５，１５……磁性流体、６，１６……ベアリング
、７，１７……筒状部、８……小空隙、９……大
空隙、１０，１９……外被、１８……空隙、Ｎ，
Ｓ……磁極。
FIG. 1 is a side sectional view of a magnetic fluid sealing device showing one embodiment of the present invention. FIG. 2 is an enlarged sectional view of the main parts in FIG. 1. FIG. 3 is a side sectional view of a conventional magnetic fluid seal device. 1,11...Permanent magnet, 2,12...Yoke,
3,13...shaft, 4,14...flange,
5,15...Magnetic fluid, 6,16...Bearing, 7,17...Cylindrical part, 8...Small gap, 9...Large gap, 10,19...Outer cover, 18...Gap, N ，
S...Magnetic pole.
Claims (1)
配置された少なくとも１個以上の軸方向に着磁し
た環状の永久磁石と、該永久磁石の側面に接して
前記シヤフトの外周に設置された環状のヨークと
、前記永久磁石と前記ヨークを被覆するフランジ
及び外被と、前記ヨークと前記シヤフトとの間に
配置された前記フランジと一体に設けた非磁性体
からなる筒状部とを有し、前記筒状部と前記シヤ
フトとで形成される空隙に磁性流体を配置して構
成された磁性流体シール装置において、前記永久
磁石の内径を前記ヨークの内径よりも大きくして
段差を設け、前記筒状部の内外両面を、前記段差
に合わせて凹凸形状としたことを特徴とする磁性
流体シール装置。 at least one axially magnetized annular permanent magnet disposed on the outer periphery of a soft magnetic shaft via a magnetic fluid; and an annular permanent magnet disposed on the outer periphery of the shaft in contact with a side surface of the permanent magnet. a yoke, a flange and an outer cover that cover the permanent magnet and the yoke, and a cylindrical part made of a non-magnetic material and provided integrally with the flange and arranged between the yoke and the shaft. , in a magnetic fluid sealing device configured by disposing a magnetic fluid in a gap formed by the cylindrical portion and the shaft, the inner diameter of the permanent magnet is made larger than the inner diameter of the yoke to provide a step; A magnetic fluid sealing device characterized in that both the inner and outer surfaces of the cylindrical portion are formed into an uneven shape to match the step.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5753990U JPH0414865U (en) | 1990-05-30 | 1990-05-30 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5753990U JPH0414865U (en) | 1990-05-30 | 1990-05-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0414865U true JPH0414865U (en) | 1992-02-06 |
Family
ID=31582340
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5753990U Pending JPH0414865U (en) | 1990-05-30 | 1990-05-30 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0414865U (en) |
-
1990
- 1990-05-30 JP JP5753990U patent/JPH0414865U/ja active Pending