JPS63125867A - Shaft seal device using magnetic liquid - Google Patents
Shaft seal device using magnetic liquidInfo
- Publication number
- JPS63125867A JPS63125867A JP61273532A JP27353286A JPS63125867A JP S63125867 A JPS63125867 A JP S63125867A JP 61273532 A JP61273532 A JP 61273532A JP 27353286 A JP27353286 A JP 27353286A JP S63125867 A JPS63125867 A JP S63125867A
- Authority
- JP
- Japan
- Prior art keywords
- shaft
- magnetic liquid
- permanent magnet
- magnet device
- housing
- 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
- 239000007788 liquid Substances 0.000 title claims abstract description 36
- 230000002093 peripheral effect Effects 0.000 claims abstract description 10
- 238000007789 sealing Methods 0.000 claims description 18
- 239000000565 sealant Substances 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims 1
- 239000011553 magnetic fluid Substances 0.000 abstract 1
- 230000005389 magnetism Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 2
- 230000005415 magnetization Effects 0.000 description 2
- 230000005405 multipole Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
Landscapes
- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
- Sealing Of Bearings (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、磁性液体を用いた軸封装置に関するもので
ある。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a shaft sealing device using a magnetic liquid.
第７図Ｉ−を特開昭５５−９４０６１号公報に示された
従来の軸封装置の縦断面図である。第７図において、１
は軸、２はハウジング、３は環状の永久磁石装置であり
、これらは同軸に配設されている。４は上記磁石装置３
の外周面をハウジング２の内周面に固着すると共に磁石
装置３とハウジング２の間を封止する封止剤、５は磁石
装置３の内周面と軸１の外周面との間に形成された間隙
６に環状に充填され、この間惇封止する磁性を有する液
体（以下、磁性液体という）であり、磁性液体５は磁石
装置３によって保持されている。FIG. 7I- is a longitudinal cross-sectional view of a conventional shaft sealing device disclosed in Japanese Patent Application Laid-Open No. 55-94061. In Figure 7, 1
2 is a shaft, 2 is a housing, and 3 is an annular permanent magnet device, which are arranged coaxially. 4 is the above magnet device 3
A sealant 5 is formed between the inner circumferential surface of the magnet device 3 and the outer circumferential surface of the shaft 1; A magnetic liquid (hereinafter referred to as magnetic liquid) fills the gap 6 in an annular manner and permanently seals the gap 6, and the magnetic liquid 5 is held by the magnet device 3.
次に、以上のように構成された従来の軸封装置の動作に
ついて説明する。磁石装置３は、第８図に矢印で示すよ
うに軸１との環状の間［６に軸心と平行に磁場を形成し
、この磁場によって磁性を有する液体５が環状の間隙６
に常に保持される。Next, the operation of the conventional shaft seal device configured as described above will be explained. The magnet device 3 forms a magnetic field parallel to the axis in an annular gap [6] with the axis 1 as shown by the arrow in FIG.
is always held.
このため、磁性液体５は、軸１がハウジング２に対し、
相対的に静止しても、回転移動しても、軸１とハウジン
グ２の間の環状の間隙６を封止する。For this reason, the magnetic liquid 5 has a shaft 1 relative to the housing 2.
The annular gap 6 between the shaft 1 and the housing 2 is sealed whether relatively stationary or in rotational movement.
従来の磁性液体を用いた軸封装置は、以上のように構成
されているので、永久磁石装置の両側面にこれらが異極
となろ着磁を強力にしなければならず、磁石装置の厚さ
を厚くすなわち軸方向の長さを長くする必要があり、ま
た軸封装置に近接して磁性を有する物体を配設できない
という問題点があった。Conventional shaft sealing devices using magnetic liquid are constructed as described above, so if these are of different polarity on both sides of the permanent magnet device, the magnetization must be strong, and the thickness of the magnet device must be It is necessary to make the shaft thicker, that is, to increase the length in the axial direction, and there are also problems in that a magnetic object cannot be disposed close to the shaft sealing device.
この発明は、上記のような問題点を解決するためになさ
れたもので、永久磁石装置の薄形化、軸封装置の小形、
軽量化ができ、また近接して磁性を有する物体を配設で
きる、磁性液体を用いた軸封装置を得ることを目的とし
ている。This invention was made to solve the above-mentioned problems, and aims to reduce the thickness of the permanent magnet device, reduce the size of the shaft seal device,
The object of the present invention is to obtain a shaft sealing device using a magnetic liquid that can be lightweight and allow magnetic objects to be placed close to each other.
この発明に係る磁性液体を用いた軸封装置は、軸とハウ
ジング間に、周方向に多極着磁し軸心とほぼ垂直になる
磁場を形成した永久磁石装置を配設し、この磁石装置の
内、外周面の少なくとも一方と軸およびハウジング側の
少な（とも一方との間隙に磁性液体を環状に配設して、
上記間隙を封止したものである。A shaft sealing device using a magnetic liquid according to the present invention includes a permanent magnet device that is circumferentially magnetized with multiple poles and forms a magnetic field substantially perpendicular to the shaft center between the shaft and the housing. A magnetic liquid is disposed in an annular manner in the gap between at least one of the outer circumferential surface and the shaft and the housing side.
The above gap is sealed.
この発明における磁性液体を用いた軸封装置は、周方向
に多８ｉｉ肴磁した永久磁石装置によってこの磁石装置
の周方向に発生する磁場により、磁性液体を磁石装置の
内、外周面の少なくとも一方と軸およびハウジング側の
少なくとも一方との間隙に保持して、この間隙を封止す
るようにしたので、磁石装置の厚さを薄くでき、また磁
性を有する物品を近接して配置しても磁路が磁石装置の
周方向に形成されるので、磁力の影響を受けない。The shaft sealing device using a magnetic liquid according to the present invention uses a magnetic field generated in the circumferential direction of the magnet device by a permanent magnet device having multiple magnets in the circumferential direction to spread the magnetic liquid to at least one of the inner and outer circumferential surfaces of the magnet device. Since the magnet device is held in a gap between the shaft and at least one of the housing side and this gap is sealed, the thickness of the magnet device can be reduced, and even if magnetic items are placed close together, the magnetic Since the path is formed in the circumferential direction of the magnet device, it is not affected by magnetic forces.
以下、この発明の一実施例を第１図ないし第３図につい
て説明する。An embodiment of the present invention will be described below with reference to FIGS. 1 to 3.
第１図、第２図において、第７図と同一符号は同一また
は相当部分を示し、７は内周面に交互にＮ極とＳ極を配
置して周方向に多極着磁した永久磁石装置である。In FIGS. 1 and 2, the same reference numerals as in FIG. 7 indicate the same or corresponding parts, and 7 is a permanent magnet that is multi-pole magnetized in the circumferential direction with N and S poles arranged alternately on the inner circumferential surface. It is a device.
以上のように構成された実施例の軸封装置は、第３図に
矢印で示す磁路をもつ磁場が軸心とほぼ垂直に永久磁石
装置７の内周面に沿って発生し、発生した磁場によって
磁性液体５が軸１と磁石装置７との環状の間隙６に常に
保持されろ。このため、磁性液体５は、軸１がハウジン
グ２に対し相対的に静止しても、回転移動しても、環状
の間隙６を封止する。In the shaft sealing device of the embodiment configured as described above, a magnetic field having a magnetic path shown by the arrow in FIG. 3 is generated along the inner peripheral surface of the permanent magnet device 7 almost perpendicular to the axis. The magnetic liquid 5 is always held in the annular gap 6 between the shaft 1 and the magnet arrangement 7 by the magnetic field. Therefore, the magnetic liquid 5 seals the annular gap 6 even when the shaft 1 is stationary or rotationally moving relative to the housing 2.
なお、上記実施例では、永久磁石装置７．磁性液体５を
軸方向の１個所に設けたが、この発明は、第４図に示す
ように、軸方向の複個所に永久磁石装置７を、これらの
間にスペーサ８をそれぞれ介在させてハウジング２内局
面に封止剤４によって固着し、前記磁石装置７の内周面
と軸１の外周面の間隙６にそれぞれ磁性液体５を環状に
配設し、この液体５で８ ’ＰＩ ６を多段に封止して
もよい。さらに、第５図に示すように、左、右永久磁石
装置７間に軸受袋Ｍ９を配設し、軸受装置９は、内輪９
ａを軸１外周面に、外輪９ｂをハウジング２内周面に、
にそれぞれ嵌合固定し、内、外輪９ａ、９ｂ間にボール
９ｃまたはローラを介在させたものである。また、この
発明は、第６図に示すように、軸１に嵌合固定された軸
受装置９の内輪９ａの両側部とハウジング２に嵌合固定
された外輪９ｂの両側部間にそれぞれ永久磁石装置７を
介在させてもよい。なお、第４図ないし第６図において
、第１図、第２図と同一符号は同一または相当部分を示
す。In addition, in the above embodiment, the permanent magnet device 7. Although the magnetic liquid 5 is provided at one location in the axial direction, in the present invention, as shown in FIG. A magnetic liquid 5 is arranged in an annular manner in the gap 6 between the inner circumferential surface of the magnet device 7 and the outer circumferential surface of the shaft 1. It may be sealed in multiple stages. Furthermore, as shown in FIG. 5, a bearing bag M9 is disposed between the left and right permanent magnet devices 7, and the bearing device 9
a to the outer peripheral surface of the shaft 1, outer ring 9b to the inner peripheral surface of the housing 2,
A ball 9c or a roller is interposed between the inner and outer rings 9a and 9b. Further, as shown in FIG. 6, the present invention provides permanent magnets between both sides of the inner ring 9a of the bearing device 9 fitted and fixed to the shaft 1 and both sides of the outer ring 9b fitted and fixed to the housing 2. A device 7 may be interposed. Note that in FIGS. 4 to 6, the same reference numerals as in FIGS. 1 and 2 indicate the same or corresponding parts.
この発明において、永久磁石装置の周方向に多８ｉｉ着
磁した外周面とハウジング内周面の間に間隙を設け、こ
の間隙を磁性液体で封止し、永久磁石装置の内周面を軸
の外周面に嵌合固定してもよく、永久磁石の周方向に多
極着磁した内、外周面と軸およびハウジングの間の両方
に間隙を設け、これらの間隙を両方とも磁性液体で封止
してもよく、さらに軸の端面にこれより大径の円板状の
永久磁石装置を固定し、この磁石装置の外周面とハウジ
ングの内周面の間に設けた隙間を磁性液体で封止しても
よい。In this invention, a gap is provided in the circumferential direction of the permanent magnet device between the multi-magnetized outer circumferential surface and the inner circumferential surface of the housing, this gap is sealed with a magnetic liquid, and the inner circumferential surface of the permanent magnet device is It may be fitted and fixed to the outer circumferential surface, and a permanent magnet is magnetized with multiple poles in the circumferential direction, and gaps are provided both between the outer circumferential surface and the shaft and housing, and both of these gaps are sealed with magnetic liquid. Furthermore, a disk-shaped permanent magnet device with a larger diameter than this is fixed to the end face of the shaft, and the gap provided between the outer peripheral surface of this magnet device and the inner peripheral surface of the housing is sealed with magnetic liquid. You may.
以上説明したように、この発明によれば、軸とハウジン
グの間に、周方向に多極着磁した永久磁石装置を設け、
永久磁石装置の内、外周面の少なくとも一方と軸および
ハウジング側の少なくとも一方との間隙に、上記磁石装
置の軸心とほぼ垂直になる磁場によって磁性液体を保持
して、上記間隙を封止したので、磁石装置の厚さを薄く
でき、また磁路が周方向に形成され、周囲の影響を受け
にくいことで、磁性を有する物品を近接して配置するこ
とができ、軸封装置全体を小形、軽量にできるという効
果が得られろ。As explained above, according to the present invention, a permanent magnet device with multi-pole magnetization in the circumferential direction is provided between the shaft and the housing,
A magnetic liquid is held in a gap between at least one of the outer circumferential surface of the permanent magnet device and at least one of the shaft and the housing side by a magnetic field that is substantially perpendicular to the axis of the magnet device, thereby sealing the gap. Therefore, the thickness of the magnet device can be reduced, and since the magnetic path is formed in the circumferential direction, it is less susceptible to the influence of the surroundings, so magnetic items can be placed close together, and the entire shaft sealing device can be made smaller. , you can get the effect of being lightweight.
第１図はこの発明の一実施例による磁性液体を用いた軸
封装置を示す縦断面図、第２図は同横断面図、第３図は
同要部の作用説明用の横断面図、第４図、第５図および
第６図はこの発明の互いに異なる他の実施例による磁性
液体をそれぞれ示す縦断面図、第７図は従来の磁性液体
を用いた軸封装置を示す縦断面図、第８図は同要部の作
用説明用の縦断面図である。
１・・軸、２−・ハウジング、４・・封止剤、５−磁性
液体、６ 間隙、７ 永久磁石装置、９・・軸受装置、
９ａ、９ｂ 内、外輪、９ｃｍボール。
なお、図中同一符号は同一または相当部分を示す。
第１図
第２図
第６図FIG. 1 is a longitudinal cross-sectional view showing a shaft sealing device using a magnetic liquid according to an embodiment of the present invention, FIG. 2 is a cross-sectional view of the same, and FIG. FIGS. 4, 5, and 6 are longitudinal sectional views showing magnetic liquids according to other different embodiments of the present invention, and FIG. 7 is a longitudinal sectional view showing a conventional shaft sealing device using magnetic liquid. , FIG. 8 is a longitudinal cross-sectional view for explaining the operation of the main parts. 1-shaft, 2-housing, 4-sealant, 5-magnetic liquid, 6-gap, 7-permanent magnet device, 9-bearing device,
9a, 9b Inner, outer ring, 9cm ball. Note that the same reference numerals in the figures indicate the same or corresponding parts. Figure 1 Figure 2 Figure 6
Claims (5)
に、周方向に多極着磁し軸心とほぼ垂直になる磁場を少
なくとも一方の周囲に沿って形成した円板状または円環
状の永久磁石装置を配設し、この磁石装置の内、外周面
の少なくとも一方と軸およびハウジング側の少なくとも
一方との間隙に磁性を有する液体を環状に配設し、この
液体によって上記間隙を封止したことを特徴とする磁性
液体を用いた軸封装置。(1) A disk-shaped or An annular permanent magnet device is disposed, and a magnetic liquid is annularly disposed in a gap between at least one of the inner and outer circumferential surfaces of the magnet device and at least one of the shaft and the housing side, and the liquid fills the gap. A shaft sealing device using a magnetic liquid, characterized in that it is sealed with a magnetic liquid.
ング内周側に固着してある特許請求の範囲第１項に記載
の磁性液体を用いた軸封装置。(2) A shaft sealing device using a magnetic liquid according to claim 1, wherein the annular permanent magnet device is fixed to the inner peripheral side of the housing with a sealant.
隔を有してそれぞれ配設し、磁性を有する液体はそれぞ
れの永久磁石装置と軸およびハウジングの少なくとも一
方との間隙にそれぞれ環状に配設してある特許請求の範
囲第１項または第２項に記載の磁性液体を用いた軸封装
置。(3) The annular permanent magnets are disposed at multiple locations in the axial direction at mutual intervals, and the magnetic liquid is placed in an annular shape in the gap between each permanent magnet device and at least one of the shaft and the housing. A shaft sealing device using a magnetic liquid according to claim 1 or 2, which is disposed in.
は、相互間隔に、軸を回転自在に支持した軸受装置が設
けてある特許請求の範囲第３項に記載の磁性液体を用い
た軸封装置。(4) An annular permanent magnet device provided at a plurality of locations in the axial direction uses a magnetic liquid according to claim 3, in which bearing devices that rotatably support the shaft are provided at mutual intervals. Shaft sealing device.
は、軸とハウジングとの間に介在された軸受装置の内輪
と外輪の軸方向両側部間に配設され、この外輪に封止剤
によって固着してあり、磁性を有する液体は永久磁石装
置と内輪との間隙にそれぞれ環状に配設してある特許請
求の範囲第１項に記載の磁性液体を用いた軸封装置。(5) The annular permanent magnet devices provided at multiple locations in the axial direction are disposed between both axial sides of the inner ring and outer ring of the bearing device interposed between the shaft and the housing, and are sealed in the outer ring. 2. A shaft sealing device using a magnetic liquid according to claim 1, wherein the magnetic liquid is fixed by a sealing agent and is annularly disposed in a gap between the permanent magnet device and the inner ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61273532A JPS63125867A (en) | 1986-11-17 | 1986-11-17 | Shaft seal device using magnetic liquid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61273532A JPS63125867A (en) | 1986-11-17 | 1986-11-17 | Shaft seal device using magnetic liquid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63125867A true JPS63125867A (en) | 1988-05-30 |
Family
ID=17529155
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61273532A Pending JPS63125867A (en) | 1986-11-17 | 1986-11-17 | Shaft seal device using magnetic liquid |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63125867A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002095271A1 (en) * | 2001-05-22 | 2002-11-28 | Nok Corporation | Magnetic fluid seal device |
| US7156724B2 (en) * | 2004-12-15 | 2007-01-02 | Qed Technologies International, Inc. | Method and apparatus for forming a dynamic magnetic seal using magnetorheological fluid |
-
1986
- 1986-11-17 JP JP61273532A patent/JPS63125867A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002095271A1 (en) * | 2001-05-22 | 2002-11-28 | Nok Corporation | Magnetic fluid seal device |
| US7100923B2 (en) | 2001-05-22 | 2006-09-05 | Nok Corporation | Magnetic fluid seal device |
| KR100866696B1 (en) * | 2001-05-22 | 2008-11-04 | 엔오케이 가부시키가이샤 | Magnetic fluid seal device |
| US7156724B2 (en) * | 2004-12-15 | 2007-01-02 | Qed Technologies International, Inc. | Method and apparatus for forming a dynamic magnetic seal using magnetorheological fluid |
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