JPH0240164U - - Google Patents
Info
- Publication number
- JPH0240164U JPH0240164U JP11796188U JP11796188U JPH0240164U JP H0240164 U JPH0240164 U JP H0240164U JP 11796188 U JP11796188 U JP 11796188U JP 11796188 U JP11796188 U JP 11796188U JP H0240164 U JPH0240164 U JP H0240164U
- Authority
- JP
- Japan
- Prior art keywords
- circumferential surface
- width
- annular
- pole piece
- 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 4
- 238000007789 sealing Methods 0.000 claims 2
Landscapes
- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
Description
第１図はこの考案の実施例の断面図、第２図は
従来の磁性流体シール装置を使用した磁気デイス
ク装置の断面図、第３図は第２図の要部拡大断面
図、第４図は第３図の要部拡大図である。
３ａ……内輪（磁性部材）、４，５……環状の
ポールピース、６……環状の磁石、７……磁性流
体、ｇ……シールギヤツプ。
Fig. 1 is a sectional view of an embodiment of this invention, Fig. 2 is a sectional view of a magnetic disk device using a conventional magnetic fluid seal device, Fig. 3 is an enlarged sectional view of the main part of Fig. 2, and Fig. 4 is an enlarged view of the main part of FIG. 3. 3a... Inner ring (magnetic member), 4, 5... Annular pole piece, 6... Annular magnet, 7... Magnetic fluid, g... Seal gap.
Claims (1)
的に固着して形成したシール部材と、前記環状の
ポールピースの周面との間にシールギヤツプを設
けて前記シール部材と同軸的に相対回転する磁性
部材と、前記シールギヤツプに磁石の磁力で保持
した磁性流体とよりなるシール装置において、前
記磁性部材のポールピース周面と対向する部位に
、前記周面の幅Ｃより同周面の両端側へそれぞれ
幅Ａと幅Ｂだけ幅広い環状の溝を設け、かつ、前
記幅Ａと幅Ｂを、 ０≦Ａ≦２Ｃ ０≦Ｂ≦２Ｃ としたことを特徴とする磁性流体シール装置。[Claims for Utility Model Registration] A seal member formed by coaxially fixing an annular pole piece to an end face of an annular magnet, and a seal gap provided between the circumferential surface of the annular pole piece, and the seal member In a sealing device comprising a magnetic member that rotates coaxially and relative to each other, and a magnetic fluid held in the seal gap by the magnetic force of the magnet, a portion of the magnetic member facing the circumferential surface of the pole piece has a width C of the circumferential surface. A magnetic fluid characterized in that annular grooves wide by a width A and a width B are provided on both ends of the same circumferential surface, respectively, and the widths A and B are 0≦A≦2C and 0≦B≦2C. sealing device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11796188U JPH0240164U (en) | 1988-09-09 | 1988-09-09 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11796188U JPH0240164U (en) | 1988-09-09 | 1988-09-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0240164U true JPH0240164U (en) | 1990-03-19 |
Family
ID=31361893
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11796188U Pending JPH0240164U (en) | 1988-09-09 | 1988-09-09 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0240164U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0247477U (en) * | 1988-09-27 | 1990-03-30 |
-
1988
- 1988-09-09 JP JP11796188U patent/JPH0240164U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0247477U (en) * | 1988-09-27 | 1990-03-30 |