JPS6174972A - Magnetic-fluid sealing apparatus - Google Patents
Magnetic-fluid sealing apparatusInfo
- Publication number
- JPS6174972A JPS6174972A JP59195438A JP19543884A JPS6174972A JP S6174972 A JPS6174972 A JP S6174972A JP 59195438 A JP59195438 A JP 59195438A JP 19543884 A JP19543884 A JP 19543884A JP S6174972 A JPS6174972 A JP S6174972A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic fluid
- shaft
- pole piece
- gap
- 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
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/40—Sealings between relatively-moving surfaces by means of fluid
- F16J15/43—Sealings between relatively-moving surfaces by means of fluid kept in sealing position by magnetic force
Abstract
Description
【発明の詳細な説明】
（イ）発明の利用分野
この発明は磁性流体密閉装置に関するもので、評言すれ
ば、軸部とハウジングの間において、磁性流体をマグネ
ットとポールピースにエリ保持する装置に関する。DETAILED DESCRIPTION OF THE INVENTION (a) Field of Application of the Invention The present invention relates to a magnetic fluid sealing device, and more particularly, to a device for retaining magnetic fluid between a shaft portion and a housing between a magnet and a pole piece. .
（ロ）従来 汐り
従来例の磁性流体密閉装置を、添付図面第２図、第３図
を参照して説明する。従来例の磁性体保持機構げラジア
ル方向に磁性流体を保持するためのギャソｆｔ設けてい
る。第２図において、ハブ２を有する軸１けハウジング
３に回転自在に支承される。ハウジング３に装着しｔポ
ールピース４にけマグネット５が挾持され、前記ポール
ピース４と軸１とのギャップに磁性流体６を存在せしめ
、軸１を含んで矢印で図示のように閉ループ磁気回路を
形成し、軸１とポールピース４との間隙で磁性流体６を
保持する。第３図は別の従来例全図示する。・・ウノン
グ８に支承される軸７の外周に突設したポールピース４
け、マ゛グネント５を挾持し、前記ポールピース４と対
向するハウジング８の内側にカラ９全設け、このカラ９
とポールピース４とのギャップに磁性流体６を保持すべ
く、図示の工うな閉ループの磁気回路を形成することは
、第２図に図示のものと同様である。(B) Conventional A conventional magnetic fluid sealing device will be described with reference to the accompanying drawings FIGS. 2 and 3. The conventional magnetic material holding mechanism is provided with a gasket for holding the magnetic fluid in the radial direction. In FIG. 2, a single shaft housing 3 having a hub 2 is rotatably supported. A magnet 5 is attached to the housing 3 and held by the pole piece 4, and a magnetic fluid 6 is present in the gap between the pole piece 4 and the shaft 1, and a closed loop magnetic circuit including the shaft 1 is formed as shown by the arrow. The magnetic fluid 6 is held in the gap between the shaft 1 and the pole piece 4. FIG. 3 shows another conventional example in its entirety. ... Pole piece 4 protruding from the outer periphery of the shaft 7 supported by the unong 8
Then, a collar 9 is provided entirely inside the housing 8 that holds the magnet 5 and faces the pole piece 4.
Forming a closed-loop magnetic circuit in the manner shown in the figure to retain the magnetic fluid 6 in the gap between the pole piece 4 and the pole piece 4 is similar to that shown in FIG.
上述の様に構成された密閉装置には次の工うな欠陥があ
る。すなわち、第２図の装置においては、ハブ２が軸Ｉ
Ｌり張出していて構成である刀・ら、組立の際、軸を・
・ウジングに嵌合組立てた後には、磁性流体６を軸１と
ポールピース４のギャップに塗布できないので、軸とハ
ウジング組立前に予め塗布しなければならない。従って
塗布全実現し、組立を完了するためには、種々の技術的
困難性が存在する。上述の困難性に、第３図に図示の装
置についても同様である。The sealing device constructed as described above has the following defects. That is, in the device shown in FIG. 2, the hub 2 is connected to the axis I.
The sword has an L-length protruding structure, so when assembling the shaft,
- After fitting and assembling the housing, the magnetic fluid 6 cannot be applied to the gap between the shaft 1 and the pole piece 4, so it must be applied in advance before assembling the shaft and housing. Therefore, various technical difficulties exist in order to fully realize the application and complete the assembly. The above-mentioned difficulties also apply to the apparatus shown in FIG.
更に軸とポールピースが分離されて、別部品全構成する
から、製造上並に組立上コスト高となる傾向がある。Furthermore, since the shaft and pole piece are separated and all of them are constructed as separate parts, manufacturing and assembly costs tend to be high.
次に第３図に図示の場合の例においては、軸７はポール
ピース４と共に回転する構成であるから、軸７とカラ９
との相対周速度が必然的に犬となり、これが定め種々の
技術的な欠陥が惹起する。例えば、磁性流体の寿命の短
縮、磁性流体内の磁性・ξ−ティクルと流体そのものの
分離、遠心力による磁性流体の飛散等に関する欠陥が発
生する。Next, in the case shown in FIG. 3, since the shaft 7 is configured to rotate together with the pole piece 4, the shaft 7 and collar 9
The relative circumferential velocity between the two ends will inevitably be too high, and this will lead to various technical deficiencies. For example, defects related to shortening of the life of the magnetic fluid, separation of the magnetic ξ-ticles in the magnetic fluid from the fluid itself, scattering of the magnetic fluid due to centrifugal force, etc. occur.
ｐ→発明の解決しようとする問題点並に手段従来例の構
成においては、磁性流体を保持する定めのギャップはラ
ジアル方向に設けであるのに対し、本実ＢＡけこのギャ
ップをアキ／アル方向に設けることに工り、従来例の欠
陥を除去するものである。すなわち軸並にハウジングよ
りそれぞれラジアル方向にポールピースを突設させ、こ
れらのポールピースの対向面に設けた一対のマグネット
間に磁性流体を保持せしめる構成を提供する。p→Problems and Means to be Solved by the Invention In the conventional configuration, the gap for holding the magnetic fluid is provided in the radial direction, whereas the actual BA gap is provided in the axial/axial direction. It is designed to eliminate the defects of the conventional example. That is, a configuration is provided in which pole pieces are provided to protrude in the radial direction from the housing along with the shaft, and the magnetic fluid is held between a pair of magnets provided on opposing surfaces of these pole pieces.
に）実施例
以下本発明の一実施例全第１図を参照して説明する。ハ
ブ１２を具えた軸１１の外周よりラジアル方向に張出し
たポールピース１４とこれと対向するようにハウジング
１３工り軸１１方向に突設した別のポールピース１５ｔ
”設ける。然して前記ポールピース１４，１５１ｃ、そ
れぞれマグネット１５．１７を対向して装着すれば、矢
印図示の工うに閉ループの磁気回路が構成され、これら
のマグネット１６．１７間のギャップに磁性流体１８が
保持される。B) Embodiment An embodiment of the present invention will be described below with reference to FIG. A pole piece 14 protrudes in the radial direction from the outer periphery of the shaft 11 provided with the hub 12, and another pole piece 15t protruding in the direction of the shaft 11 in the housing 13 so as to face the pole piece 14.
If the pole pieces 14 and 151c are mounted with magnets 15 and 17 facing each other, a closed-loop magnetic circuit is constructed as shown by the arrows, and a magnetic fluid 18 is inserted into the gap between these magnets 16 and 17. is retained.
（用効果
軸１１をハウジング１３に嵌合組立をする前に、それぞ
れのマグネツ）１６．１７に磁性流体全塗布しておけば
、たとえ張出し比ハブ１２を有する軸でもそのま＼容易
に組立てることができ、従来例の技術的困難性を除去で
きる。又軸１１、ポールピースｉ４，１５、マグネット
１６．１７、磁性流体１８で偶成する磁性流体機構の相
対周速度は従来例と比較して低く、従って流体液は安定
的であり、従来例の工うな欠陥は生じない。更に一方の
ポールピース１４に軸１１に直結、他のポールピース１
５けハウジング１３に直結し、各ポーツノピース間に対
向的にマグネン１−１６．１７が装置、組立上コストの
低減を計ることができる。(Before fitting and assembling the shaft 11 into the housing 13, each magnet) 16.17 is completely coated with magnetic fluid, so even a shaft with an overhang ratio hub 12 can be easily assembled. This eliminates the technical difficulties of the conventional example. In addition, the relative circumferential speed of the magnetic fluid mechanism consisting of the shaft 11, pole pieces i4, 15, magnets 16, 17, and magnetic fluid 18 is lower than that of the conventional example, so the fluid is stable, and the construction of the conventional example is lower. No such defects will occur. Further, one pole piece 14 is directly connected to the shaft 11, and the other pole piece 1 is directly connected to the shaft 11.
Directly connected to the 5-piece housing 13, Magnen 1-16.17 is placed oppositely between each port piece, which can reduce device and assembly costs.
第１図は本発明に係る磁性流体密閉装置の一実極例の断
面図、第２図、第３図は従来例の磁性流体密閉装置の断
面図。
１１・・・軸 １２・・・ハブ１３・・
・ハウジング １４・・・ポールピース１５・・
・ポールピース １６・・・マグネット１７・・・
マグネット １８・・・磁性流体第１図
１１ 蝕
１２ ハフ１
１３ ハウジング′
１４ 叶、ｏ、１比０−人
１５ 寸、ｏ４′ｒニー人
１６ マグ冬ヅト
１７ マグ牟ヅトFIG. 1 is a sectional view of an example of a magnetic fluid sealing device according to the present invention, and FIGS. 2 and 3 are sectional views of conventional magnetic fluid sealing devices. 11...Axle 12...Hub 13...
・Housing 14...Pole piece 15...
・Pole piece 16...Magnet 17...
Magnet 18...Magnetic fluid Fig. 1 11 Eclipse 12 Hough 1 13 Housing' 14 Leaf, o, 1 ratio 0-person 15 Sun, o4'r knee person 16 Magfuyutsuto 17 Magmuzuto
Claims (1)
けたことを特徴とする磁性流体密閉装置。 ２、軸にラジアル方向に突設したポールピースとハウジ
ングにラジアル方向に突設したポールピースとの相対す
る面にそれぞれ装着したマグネットのギャップに磁性流
体を保持可能となした特許請求の範囲第１項に記載の磁
性流体密閉装置。[Claims] 1. A magnetic fluid sealing device characterized in that a gap for retaining magnetic fluid is provided in the axial direction. 2. Claim 1 in which the magnetic fluid can be held in the gap between the magnets attached to the opposing surfaces of the pole piece protruding in the radial direction from the shaft and the pole piece protruding in the radial direction from the housing. The ferrofluid sealing device described in Section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59195438A JPS6174972A (en) | 1984-09-18 | 1984-09-18 | Magnetic-fluid sealing apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59195438A JPS6174972A (en) | 1984-09-18 | 1984-09-18 | Magnetic-fluid sealing apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6174972A true JPS6174972A (en) | 1986-04-17 |
Family
ID=16341059
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59195438A Pending JPS6174972A (en) | 1984-09-18 | 1984-09-18 | Magnetic-fluid sealing apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6174972A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5051853A (en) * | 1989-04-26 | 1991-09-24 | Nippon Seiko Kabushiki Kaisha | Magnetic disc device |
-
1984
- 1984-09-18 JP JP59195438A patent/JPS6174972A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5051853A (en) * | 1989-04-26 | 1991-09-24 | Nippon Seiko Kabushiki Kaisha | Magnetic disc device |
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