JPH04102770A - Sealing member for sealing magnetic fluid - Google Patents
Sealing member for sealing magnetic fluidInfo
- Publication number
- JPH04102770A JPH04102770A JP2219650A JP21965090A JPH04102770A JP H04102770 A JPH04102770 A JP H04102770A JP 2219650 A JP2219650 A JP 2219650A JP 21965090 A JP21965090 A JP 21965090A JP H04102770 A JPH04102770 A JP H04102770A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic fluid
- annular magnet
- plating layer
- sealing
- seal
- 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 title claims description 17
- 238000007789 sealing Methods 0.000 title description 8
- 238000007747 plating Methods 0.000 claims description 20
- 239000011248 coating agent Substances 0.000 claims description 8
- 238000000576 coating method Methods 0.000 claims description 8
- 239000002184 metal Substances 0.000 claims description 7
- 229910052751 metal Inorganic materials 0.000 claims description 7
- 239000000853 adhesive Substances 0.000 description 6
- 230000001070 adhesive effect Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 229910001128 Sn alloy Inorganic materials 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- CLDVQCMGOSGNIW-UHFFFAOYSA-N nickel tin Chemical compound [Ni].[Sn] CLDVQCMGOSGNIW-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
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
【発明の詳細な説明】
（産業上の利用分野）
この発明は磁性流体シール用のシール体に関するもので
ある。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a seal body for a magnetic fluid seal.
（従来の技術及びその問題点）
従来の磁性流体シール用のシール体は、第４図に示すよ
うに、環状マグネット５１の両側面に、磁性金属製の環
状ボールピース５２、５２を、接着剤でもって貼着する
ことによって構成されている。(Prior art and its problems) As shown in FIG. 4, a conventional magnetic fluid sealing body has annular ball pieces 52 made of magnetic metal attached to both sides of an annular magnet 51 using an adhesive. It is constructed by pasting it together.
この従来のシール体においては、接着剤と磁性流体との
相客性にチエツクが必要であることから、その選択作業
に多くの手数を要し、また接着剤の塗布、及び貼着作業
に起因して充分な製造能率が得られないという欠点があ
る．さらに上記構造では、その薄型化にも、自ずと限度
があり、装置コンパクト化のニーズに充分に対応できな
いという欠点もある。In this conventional sealing body, it is necessary to check the compatibility between the adhesive and the magnetic fluid, so the selection process requires a lot of effort, and The disadvantage is that sufficient manufacturing efficiency cannot be achieved by using this method. Furthermore, the above structure has the disadvantage that there is a limit to how thin the device can be made, and it cannot sufficiently meet the needs for making the device more compact.
この発明は上記従来の欠点を解決するためになされたも
のであって、その目的は、従来のような接着剤の選択作
業が不要であると共に、高能率に製造可能であり、しか
もその厚さをコンパクトにし得る磁性流体シール用のシ
ール体を提供することにある。This invention was made in order to solve the above-mentioned drawbacks of the conventional adhesive, and its purpose is to eliminate the need for selecting an adhesive as in the conventional method, enable highly efficient manufacturing, and reduce the thickness of the adhesive. An object of the present invention is to provide a seal body for a magnetic fluid seal that can be made compact.
（問題点を解決するための手段）
そこで第１請求項記載の磁性流体シール用のシール体で
は、環状マグネットの周囲に、磁性体金属のメッキ層を
形成したことを特徴としている。(Means for Solving the Problems) Therefore, the magnetic fluid sealing body according to the first aspect is characterized in that a plating layer of magnetic metal is formed around the annular magnet.
また第２請求項記載の磁性流体シール用のシール体では
、環状マグネットの周囲に、有機物又は無機物のコーテ
ィングを施し、さらにその上に磁性体金属のメッキ層を
形成したことを特徴としている。The magnetic fluid sealing body according to the second aspect is characterized in that an organic or inorganic coating is applied around the annular magnet, and a magnetic metal plating layer is further formed on the coating.
さらに第３請求項記載の磁性流体シール用のシール体は
、上記環状マグネットの内外周周面においては、メッキ
層が他の部分よりも薄いか、あるいはメッキ層が形成さ
れていないことを特徴としている。Furthermore, the seal body for a magnetic fluid seal according to a third aspect is characterized in that the plating layer is thinner than other parts or no plating layer is formed on the inner and outer circumferential surfaces of the annular magnet. There is.
第４請求項記載の磁性流体シール用のシール体は、上記
環状マグネットの内周面及び／又は外周面においては、
その厚さ方向の両端側が、厚さ方向中央部よりも外方へ
と突出していることを特徴としている。The seal body for a magnetic fluid seal according to the fourth aspect has the following features on the inner circumferential surface and/or outer circumferential surface of the annular magnet:
It is characterized in that both end sides in the thickness direction protrude outward from the central part in the thickness direction.
（実施例）
次にこの発明の磁性流体シール用のシール体の具体的な
実施例について、図面を参照しつつ詳細に説明する。(Example) Next, a specific example of the seal body for a magnetic fluid seal of the present invention will be described in detail with reference to the drawings.
第１図には第１実施例を示している。これは、ラバー、
プラスチック、金属等の環状マグネット１の外周部に、
透磁性の有機物又は無機物のコーティング２を施し、さ
らにその上にニッケル、ニッケルースズ合金等の磁性体
金属のメッキ層３を形成し、このメッキ層３をポールピ
ースとして機能させるようにしたものである。上記コー
ティング２は、メッキ層３の良好な形成を確保するため
、その下地処理として設けである訳であるが、場合によ
っては、第２図に示すように、コーティング２を省略し
、環状マグネット１の外周部に直接的にメッキＮ３を形
成してもよい。FIG. 1 shows a first embodiment. This is rubber,
On the outer periphery of the annular magnet 1 made of plastic, metal, etc.
A magnetically permeable organic or inorganic coating 2 is applied, and a plating layer 3 of a magnetic metal such as nickel or nickel-tin alloy is formed thereon, and this plating layer 3 functions as a pole piece. The coating 2 is provided as a base treatment to ensure good formation of the plating layer 3. However, in some cases, the coating 2 may be omitted and the annular magnet 1 may be omitted, as shown in FIG. The plating N3 may be formed directly on the outer periphery of the plate.
上記第１図及び第２図においては、環状マグネット１の
内周面及び外周面にメッキ層３が形成されておらず、側
面部のメッキ層３が環状マグネット１の内外周面を超え
てさらに外方へと延出された形状でもって形成されてい
る例を示しているが、このようなメッキパターンは、環
状マグネットｌの内外周面に、予めメッキの付着しない
ような前処理を施しておくことによって形成可能である
。In FIGS. 1 and 2 above, the plating layer 3 is not formed on the inner and outer circumferential surfaces of the annular magnet 1, and the plating layer 3 on the side surface extends beyond the inner and outer circumferential surfaces of the annular magnet 1. Although an example is shown in which the plating pattern is formed in a shape extending outward, such a plating pattern is created by pre-treating the inner and outer peripheral surfaces of the annular magnet l to prevent plating from adhering to it. It can be formed by leaving it in place.
なのこのようなメッキパターンを採用せず、環状マグネ
ット１の全面にわたってメッキ層３を形成してもよい。However, the plating layer 3 may be formed over the entire surface of the annular magnet 1 without adopting such a plating pattern.
第３図には、さらに他の実施例を示す、これは環状マグ
ネット１の内周部を断面Ｖ字状に形成し、これにより環
状マグネット１の厚さ方向の上下端部を、厚さ方向中央
部よりも外方へと突出させ、形状的に従来形状（第４図
）に近接させたものであって、このものによれば、磁路
形成が第１図や第２図の実施例よりも一段と確実に行え
るという利点が生じる。なお図示しないが、外周部も内
周部とは内外逆の同形状にしてもよいし、さらにこのよ
うな形状の環状マグネット１は、し字断面の２枚のマグ
ネットを、第３図に仮想線して示す位置において接着す
ることによって形成してもよい。FIG. 3 shows still another embodiment, in which the inner peripheral part of the annular magnet 1 is formed to have a V-shaped cross section, so that the upper and lower ends of the annular magnet 1 in the thickness direction are It is made to protrude outward from the central part and is close in shape to the conventional shape (Fig. 4), and according to this, the magnetic path formation is different from the embodiments shown in Figs. 1 and 2. This has the advantage of being much more reliable. Although not shown, the outer periphery may also have the same shape as the inner periphery, with the inside and outside reversed.Furthermore, the annular magnet 1 having such a shape can be constructed by illustrating two magnets with a cross section as shown in FIG. It may also be formed by adhering at the positions shown by lines.
上記したシール体は、その内径部にシャフトを挿通し、
両者間に磁性流体を介設する等、従来例と同様な態様に
て使用可能である。The above-mentioned seal body has a shaft inserted into its inner diameter,
It can be used in the same manner as the conventional example, such as by interposing a magnetic fluid between the two.
（発明の効果）
上記したこの発明の磁性流体シール用のシール体によれ
ば、従来のような接着剤の選択作業が不要であると共に
、高能率に製造可能であり、しかもその厚さをコンパク
トにし得るという利点が生じる。(Effects of the Invention) According to the above-described sealing body for magnetic fluid sealing of the present invention, there is no need to select an adhesive as in the past, and it can be manufactured with high efficiency, and its thickness can be reduced. This has the advantage that it can be
第１図はこの発明の磁性流体シール用のシール体の第１
実施例の説明図、第２図は第２実施例の説明図、第３図
は第３実施例の説明図、第４図は従来例の説明図である
。
１・・・環状マグネット、２・・・コーティング、３・
・・メッキ層。FIG. 1 shows the first seal body for a magnetic fluid seal of the present invention.
FIG. 2 is an explanatory diagram of the second embodiment, FIG. 3 is an explanatory diagram of the third embodiment, and FIG. 4 is an explanatory diagram of the conventional example. 1... Annular magnet, 2... Coating, 3...
...Plating layer.
Claims (4)
形成したことを特徴とする磁性流体シール用のシール体
。1. A seal body for a magnetic fluid seal, characterized by forming a plating layer of magnetic metal around an annular magnet.
ティングを施し、さらにその上に磁性体金属のメッキ層
を形成したことを特徴とする磁性流体シール用のシール
体。2. A seal body for a magnetic fluid seal, characterized in that an organic or inorganic coating is applied around an annular magnet, and a magnetic metal plating layer is further formed on the coating.
キ層が他の部分よりも薄いか、あるいはメッキ層が形成
されていないことを特徴とする第１請求項又は第２請求
項記載の磁性流体シール用のシール体。3. The magnetic fluid seal according to claim 1 or 2, wherein the plating layer is thinner than other parts or no plating layer is formed on both the inner and outer circumferential surfaces of the annular magnet. Seal body.
いては、その厚さ方向の両端側が、厚さ方向中央部より
も外方へと突出していることを特徴とする第１請求項、
第２請求項又は第３請求項記載の磁性流体シール用のシ
ール体。4. A first claim characterized in that, in the inner circumferential surface and/or the outer circumferential surface of the annular magnet, both ends in the thickness direction protrude outward from a central portion in the thickness direction,
A seal body for a magnetic fluid seal according to claim 2 or 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2219650A JPH04102770A (en) | 1990-08-20 | 1990-08-20 | Sealing member for sealing magnetic fluid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2219650A JPH04102770A (en) | 1990-08-20 | 1990-08-20 | Sealing member for sealing magnetic fluid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04102770A true JPH04102770A (en) | 1992-04-03 |
Family
ID=16738840
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2219650A Pending JPH04102770A (en) | 1990-08-20 | 1990-08-20 | Sealing member for sealing magnetic fluid |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04102770A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5536020A (en) * | 1992-08-07 | 1996-07-16 | Nidec Corporation | Magnetic fluid seal apparatus with electroplated and non-electroplated coatings |
-
1990
- 1990-08-20 JP JP2219650A patent/JPH04102770A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5536020A (en) * | 1992-08-07 | 1996-07-16 | Nidec Corporation | Magnetic fluid seal apparatus with electroplated and non-electroplated coatings |
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