JPS63111317A - Magnetic fluid shaft seal member - Google Patents
Magnetic fluid shaft seal memberInfo
- Publication number
- JPS63111317A JPS63111317A JP25799286A JP25799286A JPS63111317A JP S63111317 A JPS63111317 A JP S63111317A JP 25799286 A JP25799286 A JP 25799286A JP 25799286 A JP25799286 A JP 25799286A JP S63111317 A JPS63111317 A JP S63111317A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic
- magnetic fluid
- shaft
- annular
- ball blocks
- 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 abstract description 30
- 230000005291 magnetic effect Effects 0.000 claims abstract description 29
- 238000007789 sealing Methods 0.000 claims description 23
- 230000017525 heat dissipation Effects 0.000 claims description 12
- 230000004075 alteration Effects 0.000 abstract description 3
- 239000000696 magnetic material Substances 0.000 abstract description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 abstract description 2
- 229910000737 Duralumin Inorganic materials 0.000 abstract description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 abstract description 2
- 229910052782 aluminium Inorganic materials 0.000 abstract description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract description 2
- 229910052802 copper Inorganic materials 0.000 abstract description 2
- 239000010949 copper Substances 0.000 abstract description 2
- 229910052709 silver Inorganic materials 0.000 abstract description 2
- 239000004332 silver Substances 0.000 abstract description 2
- 230000005855 radiation Effects 0.000 abstract 4
- 230000008016 vaporization Effects 0.000 abstract 2
- 238000009834 vaporization Methods 0.000 abstract 2
- 230000006866 deterioration Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 230000007423 decrease Effects 0.000 description 3
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910000859 α-Fe Inorganic materials 0.000 description 2
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- 229910001289 Manganese-zinc ferrite Inorganic materials 0.000 description 1
- 239000005662 Paraffin oil Substances 0.000 description 1
- JIYIUPFAJUGHNL-UHFFFAOYSA-N [O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[Mn++].[Mn++].[Mn++].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Zn++].[Zn++] Chemical compound [O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[Mn++].[Mn++].[Mn++].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Zn++].[Zn++] JIYIUPFAJUGHNL-UHFFFAOYSA-N 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000010696 ester oil Substances 0.000 description 1
- 230000005294 ferromagnetic effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002923 metal particle Substances 0.000 description 1
- 239000002480 mineral oil Substances 0.000 description 1
- 235000010446 mineral oil Nutrition 0.000 description 1
- NQNBVCBUOCNRFZ-UHFFFAOYSA-N nickel ferrite Chemical compound [Ni]=O.O=[Fe]O[Fe]=O NQNBVCBUOCNRFZ-UHFFFAOYSA-N 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 229920002545 silicone oil Polymers 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
Abstract
Description
【発明の詳細な説明】 産業上の利用分野 本発明は磁性流体軸シール部材に関する。[Detailed description of the invention] Industrial applications The present invention relates to a magnetic fluid shaft seal member.
従来の技術
磁性流体軸シール部材は、例えば防塵シール、Ｘ線発生
装置、半導体結晶引上炉、低温冷却装置、真空回転フィ
ードスルー、フライホイール等において使用されている
封止装置である。Conventional magnetic fluid shaft seal members are sealing devices used in, for example, dustproof seals, X-ray generators, semiconductor crystal pulling furnaces, low temperature cooling devices, vacuum rotary feedthroughs, flywheels, and the like.
従来の磁性流体軸シール部材は例えば第８図の模式的断
面図に示すように、円筒状磁石（２）を挟持した磁性環
状ボールブロック（１）と磁性軸（４）との間隙に磁性
流体（３）を付着させた構成または第９図の模式的断面
図に示すように、円筒状磁石（２）および磁性環状ボー
ルブロック（１）を多段に配設した構成を有する。第１
０図では、軸（４）かで
非磁性の場合、磁性体グできた円筒を軸（４）に嵌め込
むことにより、第８図と同じ磁気回路を作り出すもので
、この円筒（６）を磁性軸カバーと名付けろ。A conventional magnetic fluid shaft sealing member, for example, as shown in the schematic cross-sectional view of FIG. (3) or, as shown in the schematic cross-sectional view of FIG. 9, has a structure in which cylindrical magnets (2) and magnetic annular ball blocks (1) are arranged in multiple stages. 1st
In Figure 0, if the shaft (4) is non-magnetic, the same magnetic circuit as in Figure 8 is created by fitting a cylinder made of magnetic material into the shaft (4). Name it magnetic shaft cover.
発明が解決しようとする問題点
磁性流体軸シール部材においては、ボールブロックおよ
び回転軸が磁性体である必要がある。加えて耐蝕性が要
求されるため通常は磁性ステンレス、例えばＳＵＳ＃４
３０、＃４０３、＃４１６等が使用されるが、磁性ステ
ンレスは伝熱性か悪く、軸を高速回転すると磁性流体の
粘性抵抗による発熱によってシール部の温度上昇をもた
らし、磁性流体の蒸発や変質による劣化および磁石の性
能低下等によってシール部材の封止能が経時的に低下す
る。Problems to be Solved by the Invention In the magnetic fluid shaft sealing member, the ball block and the rotating shaft must be made of magnetic material. In addition, corrosion resistance is required, so magnetic stainless steel, such as SUS#4, is usually used.
30, #403, #416, etc. are used, but magnetic stainless steel has poor heat conductivity, and when the shaft rotates at high speed, heat generation due to the viscous resistance of the magnetic fluid causes the temperature of the seal to rise, resulting in evaporation and deterioration of the magnetic fluid. The sealing ability of the sealing member decreases over time due to deterioration, decreased performance of the magnet, and the like.
本発明は従来の磁性流体軸シール部材のこのような問題
点を解決するためになされたものである。The present invention has been made to solve these problems of conventional magnetic fluid shaft seal members.
問題点を解決するための手段
即ち、本発明は少なくとも２個の磁性環状ボールブロッ
ク、該ボールブロック間に挟持された環状磁石、該ボー
ルブロックの環内に間隙を設けて貫設された磁性軸、お
よび該ボールブロックに装着した放熱部材を具備し、該
間隙内に磁性流体を磁気的に保持した磁性流体軸シール
部材に関する。Means for solving the problem, that is, the present invention comprises at least two magnetic annular ball blocks, an annular magnet sandwiched between the ball blocks, and a magnetic shaft passing through the ring of the ball blocks with a gap therebetween. The present invention relates to a magnetic fluid shaft sealing member comprising a heat dissipating member attached to the ball block and magnetically holding a magnetic fluid within the gap.
第１図は本発明による磁性流体軸シール部材の一＠様を
示す模式的断面図である。FIG. 1 is a schematic sectional view showing one aspect of the magnetic fluid shaft sealing member according to the present invention.
少なくとも２個の磁性環状ボールブロック（１）および
該ボールブロック間に挟持された環状磁石（２）は従来
の磁性流体軸シール部材に使用されているボールブロッ
クや磁石を使用すればよい。大きな磁力、従って高い封
止能を得たい場合や装置が大型の場合にはより厚い円筒
状磁石を使用するのが一般的である。As the at least two magnetic annular ball blocks (1) and the annular magnet (2) sandwiched between the ball blocks, ball blocks and magnets used in conventional magnetic fluid shaft sealing members may be used. Thicker cylindrical magnets are generally used when a large magnetic force and therefore a high sealing ability are desired or when the device is large.
本発明による磁性流体軸シール部材においては、磁性環
状ボールブロック（１）によって形成される環状空間内
に貫設された磁性軸（４）の高速回転に伴って発生する
熱を放熱部材（５）を通して系外へ放出さ仕る。In the magnetic fluid shaft sealing member according to the present invention, the heat radiating member (5) dissipates the heat generated as a result of high-speed rotation of the magnetic shaft (4) inserted through the annular space formed by the magnetic annular ball block (1). It is released to the outside of the system through
放熱部材（５）の材質は銅、銀、アルミニウム、ジュラ
ルミン等の非磁性のものである。磁性の放熱部材を使用
するとシール部材の磁気抵抗が増大し、磁気回路中の磁
束密度の減少によりシール効果が低下するので好ましく
ない。The material of the heat dissipation member (5) is non-magnetic such as copper, silver, aluminum, duralumin, etc. Use of a magnetic heat dissipating member is undesirable because the magnetic resistance of the sealing member increases and the sealing effect decreases due to a decrease in magnetic flux density in the magnetic circuit.
放熱部材は厚さ０．５〜Ｉｍｍが適当であり、厚くても
構わないが、これより薄すぎると放熱効果が低下する。The appropriate thickness of the heat dissipation member is 0.5 to Imm, and it may be thicker, but if it is too thin, the heat dissipation effect will be reduced.
本発明に使用する磁性流体（３）は特に限定的ではなく
、従来からこの種の装置に用いられているもの、例えば
、マグネタイト、マンガンフェライト、ニッケルフェラ
イト、コバルトフェライト、マンガン亜鉛フェライト、
金属超微粒子等の強磁性粒子表面を各種の界面活性剤に
より被覆し、パラフィン油、鉱物油、合成油、エステル
油、シリコン浦、フッ素油等、その他の溶媒に分散させ
た磁性流体を適宜使用すればよい。The magnetic fluid (3) used in the present invention is not particularly limited, and includes those conventionally used in this type of device, such as magnetite, manganese ferrite, nickel ferrite, cobalt ferrite, manganese zinc ferrite,
The surface of ferromagnetic particles such as ultrafine metal particles is coated with various surfactants, and magnetic fluids dispersed in other solvents such as paraffin oil, mineral oil, synthetic oil, ester oil, silicone oil, fluorine oil, etc. are used as appropriate. do it.
第１図に示す態様の場合、環状の放熱部材（５）がボー
ルブロックに装着されているので、磁性軸（４）の高速
回転に伴って発生する熱は放熱部材（５）を経て、磁性
流体軸シール部材を収納するケーシング（図示されてい
ない）に伝導されて外部へ放出される。他の実施例を第
２図および第３図、第４図、第５図、第６図、第７図に
示す。第２図、第３図はボールブロックの内周側に鋭角
的な溝を設けたものである
第６図は本発明による磁性流体軸シール部材の別態様を
示す模式的断面図である。In the case of the embodiment shown in Fig. 1, the annular heat dissipation member (5) is attached to the ball block, so that the heat generated due to the high speed rotation of the magnetic shaft (4) passes through the heat dissipation member (5) and It is conducted to a casing (not shown) that houses the fluid shaft seal member and is discharged to the outside. Other embodiments are shown in FIGS. 2, 3, 4, 5, 6, and 7. 2 and 3 are ball blocks in which acute-angled grooves are provided on the inner peripheral side. FIG. 6 is a schematic sectional view showing another embodiment of the magnetic fluid shaft sealing member according to the present invention.
第６図に示すシール部材は基本的には第１図に示すシー
ル部材を多段的に配設した態様で、これによってシール
耐圧やシール効率を高めることができる。ボールブロッ
クの装着は第６図に示すごとく磁気回路を形成する一組
のボールブロック−磁石−ボールブロックとそれに隣接
する一組のボールブロック−磁石−ボールブロック間に
挿入して行なう。ボールブロックと磁石間に挿入したり
、他の組のボールブロックが直接接触するように（即ち
放熱部材を部分的に挿入させないで）設置すると、磁気
回路が乱れたり、磁気抵抗の増大によりシール効果が低
下するので好ましくない。The sealing member shown in FIG. 6 is basically a configuration in which the sealing members shown in FIG. 1 are arranged in multiple stages, thereby increasing sealing pressure resistance and sealing efficiency. As shown in FIG. 6, the ball blocks are inserted between a pair of ball blocks-magnet-ball blocks forming a magnetic circuit and an adjacent pair of ball blocks-magnet-ball blocks. If a ball block is inserted between a magnet and another set of ball blocks are placed in direct contact (i.e., without partially inserting the heat dissipation member), the magnetic circuit may be disrupted or the sealing effect may be affected due to increased magnetic resistance. This is not preferable because it reduces the
第７図では、磁性軸カバー（６）と軸（４）の間に放熱
円筒（７）が設けられ、この放熱円筒（７）を通して熱
を速やかに外部へ放出する。In FIG. 7, a heat dissipation cylinder (7) is provided between the magnetic shaft cover (6) and the shaft (4), and heat is rapidly released to the outside through this heat dissipation cylinder (7).
発明の効果
本発明による磁性流体軸シール部材においては、軸の回
転時に磁性流体の粘性抵抗によって発生する熱は放熱部
材によって効果的に系外へ放出されるので、シール部分
の温度上昇に起因する磁性流体の蒸発や変質による劣化
および磁石の性能低下等によるシール効率の経時的低下
は有効に防止される。Effects of the Invention In the magnetic fluid shaft sealing member according to the present invention, the heat generated by the viscous resistance of the magnetic fluid when the shaft rotates is effectively released to the outside of the system by the heat dissipation member, resulting in a temperature increase in the sealing portion. Deterioration of the sealing efficiency over time due to deterioration due to evaporation or alteration of the magnetic fluid, deterioration of magnet performance, etc. is effectively prevented.
第１図および第２図、第３図、第４図、第５図、第６図
、第７図は本発明による磁性流体軸シール部材の模式的
断面図と実施例である。
第８図および第９図、第１Ｏ図は従来の磁性流体軸シー
ル部材の模式的断面図である。
（１）は磁性環状ボールブロック、（２）は円筒状磁石
、（３）は磁性流体、（４）は磁性軸、（５）は放熱部
材、（６）は磁性軸カバー、（７）は放熱円筒を示す。
第８区
第９ＷＪ1, 2, 3, 4, 5, 6, and 7 are schematic cross-sectional views and examples of the magnetic fluid shaft seal member according to the present invention. FIGS. 8, 9, and 10 are schematic cross-sectional views of conventional magnetic fluid shaft seal members. (1) is a magnetic annular ball block, (2) is a cylindrical magnet, (3) is a magnetic fluid, (4) is a magnetic shaft, (5) is a heat dissipation member, (6) is a magnetic shaft cover, and (7) is A heat dissipation cylinder is shown. 8th Ward 9th WJ
Claims (1)
ルブロック間に挟持された環状磁石、該ボールブロック
の環内に間隙を設けて貫設された磁性軸、および該ボー
ルブロックに装着した放熱部材を具備し、該間隙内に磁
性流体を磁気的に保持した磁性流体軸シール部材。1. At least two magnetic annular ball blocks, an annular magnet sandwiched between the ball blocks, a magnetic shaft passing through the ring of the ball blocks with a gap, and a heat dissipation member attached to the ball blocks. A magnetic fluid shaft sealing member, comprising: a magnetic fluid shaft sealing member magnetically retaining magnetic fluid within the gap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25799286A JPS63111317A (en) | 1986-10-29 | 1986-10-29 | Magnetic fluid shaft seal member |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25799286A JPS63111317A (en) | 1986-10-29 | 1986-10-29 | Magnetic fluid shaft seal member |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63111317A true JPS63111317A (en) | 1988-05-16 |
Family
ID=17314034
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25799286A Pending JPS63111317A (en) | 1986-10-29 | 1986-10-29 | Magnetic fluid shaft seal member |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63111317A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016183776A (en) * | 2015-03-25 | 2016-10-20 | イーグル工業株式会社 | High peripheral speed magnetic fluid seal structure |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5481454A (en) * | 1977-12-08 | 1979-06-28 | Mitsubishi Electric Corp | Magnetic fluid seal |
| JPS58225273A (en) * | 1982-06-24 | 1983-12-27 | フエロフルイデイクス・コ−ポレイシヨン | Rotary sealing device using magnetic fluid |
-
1986
- 1986-10-29 JP JP25799286A patent/JPS63111317A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5481454A (en) * | 1977-12-08 | 1979-06-28 | Mitsubishi Electric Corp | Magnetic fluid seal |
| JPS58225273A (en) * | 1982-06-24 | 1983-12-27 | フエロフルイデイクス・コ−ポレイシヨン | Rotary sealing device using magnetic fluid |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016183776A (en) * | 2015-03-25 | 2016-10-20 | イーグル工業株式会社 | High peripheral speed magnetic fluid seal structure |
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