JPS6216353B2 - - Google Patents
Info
- Publication number
- JPS6216353B2 JPS6216353B2 JP57154613A JP15461382A JPS6216353B2 JP S6216353 B2 JPS6216353 B2 JP S6216353B2 JP 57154613 A JP57154613 A JP 57154613A JP 15461382 A JP15461382 A JP 15461382A JP S6216353 B2 JPS6216353 B2 JP S6216353B2
- Authority
- JP
- Japan
- Prior art keywords
- shaft
- brush
- magnetic fluid
- rotating shaft
- 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.)
- Expired
Links
- 238000007789 sealing Methods 0.000 claims description 20
- 239000011553 magnetic fluid Substances 0.000 claims description 14
- 239000012530 fluid Substances 0.000 description 3
- 230000001771 impaired effect Effects 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
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
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
Description
【発明の詳細な説明】
本発明は、磁性流体による軸封装置に関するも
のである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a shaft sealing device using magnetic fluid.
従来の磁性流体による軸封装置は、たとえば、
第１図に示すような構成からなつている。 Conventional shaft sealing devices using magnetic fluid, for example,
It consists of a structure as shown in FIG.
第１図において、Ａは大気側、Ｂは機内側、１
は回転軸、２はスリーブ、３はスタフイングボツ
クス、４と５は磁極片、６は磁石、７と８はＯリ
ング、９は櫛形シール部、１０は磁性流体であ
る。すなわち、従来の磁性流体軸封装置は、リン
グ状の２個（一対）の磁極片４と５の間に磁石６
をリング状に配置し、これをスタフイングボツク
ス３内に、回転軸１と同芯に組立てられている。
この２個の磁極片４と５の回転軸外周面（図では
スリーブ２の外周面）に近接する部分には、軸方
向に複数個の溝が加工され、櫛形断面形状をした
櫛形シール部９を成している。このシール部９と
前記回転軸外周面で形成される隙間Ｓには、磁性
流体１０が封じ込められ、磁石の作用によつて流
体膜が形成され、シール作用を成すが、そのシー
ル性能は流体膜の強さによつて左右される。そし
て、流体膜の強さは、流体膜内の磁束密度差によ
つて決まるので、前記隙間Ｓは小さいほど、シー
ル性能がよい。すなわち、磁性流体軸シールは、
前記隙間Ｓを小さくする技術によつてシール性能
を極めて向上させることができる。ところが、一
般の産業機械では、軸の半分方向への変位あるい
は振動等、また大口径になれば加工精度の制限を
受け、前記隙間Ｓを小さくすることには、多くの
問題があつた。 In Figure 1, A is the atmosphere side, B is the inside of the aircraft, 1
2 is a rotating shaft, 2 is a sleeve, 3 is a stuffing box, 4 and 5 are magnetic pole pieces, 6 is a magnet, 7 and 8 are O-rings, 9 is a comb-shaped seal portion, and 10 is a magnetic fluid. That is, the conventional magnetic fluid shaft seal device has a magnet 6 between two (pair) ring-shaped magnetic pole pieces 4 and 5.
are arranged in a ring shape and assembled in a stuffing box 3 coaxially with the rotating shaft 1.
A plurality of grooves are machined in the axial direction on the parts of the two magnetic pole pieces 4 and 5 that are close to the outer circumferential surface of the rotating shaft (the outer circumferential surface of the sleeve 2 in the figure), and a comb-shaped seal portion 9 with a comb-shaped cross section is formed. has been achieved. A magnetic fluid 10 is sealed in the gap S formed between the seal portion 9 and the outer circumferential surface of the rotating shaft, and a fluid film is formed by the action of the magnet to perform a sealing action. depends on the strength of Since the strength of the fluid film is determined by the difference in magnetic flux density within the fluid film, the smaller the gap S, the better the sealing performance. In other words, the magnetic fluid shaft seal is
The sealing performance can be greatly improved by the technique of reducing the gap S. However, in general industrial machines, there are many problems in reducing the gap S, such as displacement in the half direction of the shaft, vibration, etc., and limitations on machining accuracy when the diameter becomes large.
本発明は、小口径軸の場合は、もちろんのこ
と、大口径軸の場合でも、シール隙間を極めて小
さくすることを可能にし、かつ、軸の半径方向移
動に対しても、シール性能を損わない構造の磁性
流体による軸封装置を提供することを目的とする
ものである。 The present invention makes it possible to make the sealing gap extremely small not only in the case of small diameter shafts but also in the case of large diameter shafts, and also prevents sealing performance from being impaired even when the shaft moves in the radial direction. It is an object of the present invention to provide a shaft sealing device using a magnetic fluid with a structure similar to that of the previous invention.
このため、本発明の磁性流体による軸封装置の
構成は、回転軸のシールすべき部分の回転体側と
磁極片側のいずれか一方にブラシ状のシール部を
備えていることを特徴としている。 For this reason, the configuration of the shaft sealing device using a magnetic fluid according to the present invention is characterized in that a brush-shaped sealing portion is provided on either the rotating body side of the portion of the rotating shaft to be sealed or one side of the magnetic pole.
以下、本発明の実施態様について、第２図ない
し第７図を参照しながら説明する。 Embodiments of the present invention will be described below with reference to FIGS. 2 to 7.
第２図は本発明の第１実施例を示したもので、
ＡとＢおよび１ないし８は第１図の場合と同様で
ある。そして、１１は後述するブラシ形シール
部、１２は磁性流体である。 FIG. 2 shows a first embodiment of the present invention.
A and B and 1 to 8 are the same as in FIG. Reference numeral 11 represents a brush-shaped seal portion, which will be described later, and 12 represents a magnetic fluid.
すなわち、第２図の場合、従来のものと大きく
異なる部分は、磁極片４と５の内径面にブラシ形
シール部１１を設けたことにある。そして、ブラ
シ形シール部１１は、第３図に拡大して示すよう
に、ブラシ体１１′とスペーサ１１″とから成立つ
ている。さらに、ブラシ体１１′は、第４図また
は第５図あるいは第６図に示すように、薄い鋼板
の内径側を細く切り込んだものを、複数枚重ね合
せ、外周部で互いに溶接したものから成立つてい
る。もちろん、薄い鋼板の内径側の切り込み形状
は、条件によつて適当な形状とし、同一のものま
たは異形のものの組合せでも有効である。またブ
ラシ体１１′は、細いワイヤーの集合体によつて
構成することもできる。とくに、ブラシ体１１′
を第５図および第６図に示すように、半径方向に
直線でない形状とすることにより、磁力線の作用
を受けた場合、回転軸外周面との隙間（第３図の
Ｓ参照）が小さくなる方向に変位する。 That is, in the case of FIG. 2, the major difference from the conventional one is that a brush-shaped seal portion 11 is provided on the inner diameter surface of the magnetic pole pieces 4 and 5. The brush-shaped seal portion 11 is made up of a brush body 11' and a spacer 11'', as shown in an enlarged view in FIG. As shown in Figure 6, it is made up of several thin steel plates with narrow cuts made on the inner diameter side, stacked together and welded together at the outer periphery.Of course, the shape of the cut on the inner diameter side of the thin steel plate is subject to certain conditions. The brush body 11' can be formed into an appropriate shape, and a combination of the same or different shapes is also effective.The brush body 11' can also be constructed from a collection of thin wires.In particular, the brush body 11'
As shown in Figures 5 and 6, by making it into a shape that is not straight in the radial direction, the gap with the outer peripheral surface of the rotating shaft (see S in Figure 3) becomes smaller when subjected to the action of magnetic lines of force. displacement in the direction.
以上のように、磁極片４と５の内径面に設けた
複数個のブラシ形シール部１１は回転軸外周面
（第２図ではスリーブ２の外周面）と接触して
も、ブラシ体１１′の容易な変形によつて互いに
損傷することなく、シール性能を損うことがな
い。したがつて、ブラシ体１１′が容易に変形す
るため、製作時のブラシ体１１′の内径寸法は厳
しく製限する必要がない。このように、回転軸１
の半径方向への変形があつても、また軸振動が大
きい場合でも、シール性能を損うことがなく、さ
らに大口径のシール装置として適用する場合で
も、加工精度による制限を受けることがない。 As described above, even if the plurality of brush-shaped seals 11 provided on the inner diameter surfaces of the magnetic pole pieces 4 and 5 come into contact with the outer circumferential surface of the rotating shaft (the outer circumferential surface of the sleeve 2 in FIG. 2), the brush body 11' They do not damage each other due to easy deformation, and sealing performance is not impaired. Therefore, since the brush body 11' is easily deformed, there is no need to strictly limit the inner diameter dimension of the brush body 11' during manufacture. In this way, the rotation axis 1
Even if there is deformation in the radial direction of the seal, or even if the shaft vibration is large, the sealing performance will not be impaired, and even when applied as a large-diameter sealing device, there will be no limitations due to processing accuracy.
第７図は本発明の第２実施例を示したものであ
る。すなわち、第２図では、回転軸１に取付けら
れた回転体としてのスリーブ２の円筒面シールの
場合を示したが、第７図のように、回転軸１に取
付けられた回転体としての回転円板１３の端面シ
ールの場合も、同様なことが成立する。 FIG. 7 shows a second embodiment of the present invention. That is, although FIG. 2 shows the case of a cylindrical face seal of the sleeve 2 as a rotating body attached to the rotating shaft 1, as shown in FIG. The same holds true for the end seal of the disk 13.
上述のように、本発明の磁性流体による軸封装
置は、回転軸のシールすべき部分の回転体側と磁
極片側のいずれか一方にブラシ状のシール部を備
えているから、前記回転体側と磁極片側の間の隙
間を極めて小さくすることができ、したがつて、
軸の振動等によつてブラシ体が相手方に接触して
も、損傷を受けることがなく、シール性が低下し
ない。また大口径軸に対しても、加工精度の制限
を受けないため、大きさによる使用上の問題が生
じないうえ、冷却効果が大きいので、高速に適
し、かつ、寿命が長く、耐久性に富むなど、本発
明の奏する効果は極めて大である。 As described above, the magnetic fluid shaft sealing device of the present invention is provided with a brush-shaped sealing portion on either the rotating body side or one side of the magnetic pole of the part of the rotating shaft to be sealed. The gap between the sides can be made extremely small, thus
Even if the brush body comes into contact with the other party due to vibration of the shaft, it will not be damaged and the sealing performance will not deteriorate. In addition, since there are no limitations on machining accuracy for large-diameter shafts, there are no problems in use due to size, and the cooling effect is large, making it suitable for high speeds, long life, and excellent durability. The effects of the present invention are extremely large.
第１図は従来の磁性流体軸封装置の上半分を示
した断面側面図、第２図は本発明の第１実施例の
上半分を示した断面側面図、第３図は第２図のブ
ラシ形シール部を拡大して示した側面図、第４図
は第３図のブラシ体の一つの態様を示した部分正
面図、第５図は同じくもう一つの態様を示した部
分正面図、第６図は同じく更にもう一つの態様を
示した部分正面図、第７図は本発明の第２実施例
の上半分を示した断面側面図である。
１……回転軸、２……スリーブ、４，５……磁
極片、６……磁石、１１……ブラシ形シール部、
１１′……ブラシ、１２……磁性流体、１３……
回転円板。
Fig. 1 is a sectional side view showing the upper half of a conventional magnetic fluid shaft sealing device, Fig. 2 is a sectional side view showing the upper half of the first embodiment of the present invention, and Fig. 3 is a sectional side view showing the upper half of the conventional magnetic fluid shaft sealing device. FIG. 4 is a partial front view showing one embodiment of the brush body of FIG. 3; FIG. 5 is a partial front view showing another embodiment of the brush body; FIG. 6 is a partial front view showing yet another embodiment, and FIG. 7 is a sectional side view showing the upper half of the second embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Rotating shaft, 2... Sleeve, 4, 5... Magnetic pole piece, 6... Magnet, 11... Brush type seal part,
11'...Brush, 12...Magnetic fluid, 13...
rotating disk.
Claims (1)
片側のいずれか一方にブラシ状のシール部を備え
ていることを特徴とする、磁性流体による軸封装
置。1. A shaft sealing device using a magnetic fluid, characterized in that a brush-shaped sealing portion is provided on either the rotating body side of the portion of the rotating shaft to be sealed or one side of the magnetic pole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57154613A JPS5947566A (en) | 1982-09-07 | 1982-09-07 | Shaft seal device employing magnetic fluid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57154613A JPS5947566A (en) | 1982-09-07 | 1982-09-07 | Shaft seal device employing magnetic fluid |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5947566A JPS5947566A (en) | 1984-03-17 |
| JPS6216353B2 true JPS6216353B2 (en) | 1987-04-11 |
Family
ID=15588009
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57154613A Granted JPS5947566A (en) | 1982-09-07 | 1982-09-07 | Shaft seal device employing magnetic fluid |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5947566A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2198195B (en) * | 1986-12-06 | 1990-05-16 | Rolls Royce Plc | Brush seal |
| JPH04101868U (en) * | 1991-02-12 | 1992-09-02 | エヌオーケー株式会社 | Magnetic fluid seal device |
| KR100906072B1 (en) | 2008-06-11 | 2009-07-03 | 박광준 | Magnetic fluid sealing member and vacuum sealing device including the same |
| CN103925372B (en) * | 2014-05-04 | 2015-07-22 | 北京交通大学 | Brush type magnetic liquid sealing device |
-
1982
- 1982-09-07 JP JP57154613A patent/JPS5947566A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5947566A (en) | 1984-03-17 |
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