JPS5891968A - Vacuum seal device for high-speed revolution shaft - Google Patents
Vacuum seal device for high-speed revolution shaftInfo
- Publication number
- JPS5891968A JPS5891968A JP56189576A JP18957681A JPS5891968A JP S5891968 A JPS5891968 A JP S5891968A JP 56189576 A JP56189576 A JP 56189576A JP 18957681 A JP18957681 A JP 18957681A JP S5891968 A JPS5891968 A JP S5891968A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic fluid
- air
- shaft
- fluid seal
- pressure chamber
- 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
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は、高速回転軸用真空シール装置に関するもので
ある。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a vacuum sealing device for a high-speed rotating shaft.
例えばフライホイール式蓄エネルギ装置等のように、高
速回転軸の導入部をもつ大型の真空槽は、その槽内の真
空度を維持するために上記回転軸の導入部に特□別の真
空シール手段を用いる必要がある。このような真空シー
ル手段として、非接触型密封シールを形成する磁性流体
シールを利用するのが有効であると考えられるが、この
磁性流体シー・ルでは、軸の周速が大きくなると、磁性
流体のし、簡単な構造ですぐれたシール能力を維持でき
るようにしたもので、真空槽の槽壁・における回転軸の
導入部に、その回転軸との間を磁気の作用によって保持
された磁性流体でシールする磁性流体シールを設け、上
記回転軸に、その回転に伴うポンピング作用により磁性
流体シールの大気側に区画形成した低圧室内の空気を排
出してそれを低圧化するーボンピング手段を設けたこと
を特徴とするものである。For example, in a large vacuum chamber with an introduction part for a high-speed rotating shaft, such as a flywheel type energy storage device, a special vacuum seal is installed at the introduction part of the rotating shaft in order to maintain the degree of vacuum inside the tank. It is necessary to use means. As such a vacuum sealing means, it is thought to be effective to use a magnetic fluid seal that forms a non-contact hermetic seal, but with this magnetic fluid seal, as the peripheral speed of the shaft increases, the magnetic fluid It has a simple structure and maintains excellent sealing ability, and the magnetic fluid that is held between the rotating shaft and the rotating shaft by the action of magnetism is placed at the introduction part of the rotating shaft in the wall of the vacuum chamber. A magnetic fluid seal is provided, and a pumping means is provided on the rotating shaft, which discharges air in a low pressure chamber defined on the atmospheric side of the magnetic fluid seal and lowers the pressure by a pumping action accompanying the rotation of the rotating shaft. It is characterized by:
以上、本発明の実施例を図面に基づい一詳述する。The embodiments of the present invention will now be described in detail based on the drawings.
第１図及び第２図に示すそれぞれの実施例にお７を保持
し、この磁性流体７によって槽壁ｌと回転軸２の間をシ
ールするものである。7 is held in each of the embodiments shown in FIGS. 1 and 2, and the space between the tank wall l and the rotating shaft 2 is sealed by this magnetic fluid 7.
上記磁性流体シール３の大気側に区画形成した低圧室８
内の空気を排出してその室内を低圧化するため、上記回
転軸２には、その回転に伴うボンピング作用により低圧
室８からの排気を行うボンピング手段９を設けている。A low pressure chamber 8 is defined on the atmosphere side of the magnetic fluid seal 3.
In order to reduce the pressure in the chamber by discharging the air inside the chamber, the rotary shaft 2 is provided with a pumping means 9 that exhausts air from the low pressure chamber 8 by a pumping action accompanying the rotation of the rotary shaft 2.
このボンピング手段９としては、第１図に示したように
、槽壁ｌの筒状部１０の内面との間に狭い間隙を保って
回転するねじ状部材を設け、あるいは第２図に示すよう
に翼状部材を設けることもできる。As shown in FIG. 1, this pumping means 9 may be provided with a threaded member that rotates while maintaining a narrow gap between it and the inner surface of the cylindrical portion 10 of the tank wall l, or as shown in FIG. It is also possible to provide wing-like members.
上記構成を有する真空シール装置は、回転軸１流量が少
なく、さらにその漏れ気流により磁性流体が吹き飛ばさ
れることもなくなるので、すぐれたシール能力を発揮す
ることになる。The vacuum seal device having the above configuration exhibits excellent sealing ability because the flow rate of the rotary shaft 1 is small and the magnetic fluid is not blown away by the leakage air flow.
このように、本発明の真空シール装置によれば、高速回
転する回転軸を利用してそれに設けたボンピング手段に
よシ磁性流体シールの大気側に形成した低圧室の排気を
行うようにしているため、極めて簡単な手段により磁性
流体シールの両側の圧力差を小さくシ、磁性流体のシー
ル膜を安定化することができる。しかも、上記ボンピン
グ手段は回転軸の回転が高速化するほど低圧室の圧力を
低下させることになるため、回転軸の高速化に伴つなも
のである。As described above, according to the vacuum seal device of the present invention, the low pressure chamber formed on the atmospheric side of the magnetic fluid seal is evacuated by the pumping means provided on the rotating shaft that rotates at high speed. Therefore, it is possible to reduce the pressure difference on both sides of the magnetic fluid seal and stabilize the magnetic fluid seal film by extremely simple means. Moreover, the above-mentioned pumping means reduces the pressure in the low pressure chamber as the rotation speed of the rotary shaft increases, and therefore, the pumping means is used as the speed of the rotary shaft increases.
第１図及び第２図は本発明の真空シール装置の異なる実
施例を示す断面図である。
Ａ・・・大気側、 Ｂ−曝・真空側、１・・・真空
槽の槽壁、２・・・高速回転軸、 □３・・・磁性
流体シール、７・・・磁性流体、８゛・・・低圧室、
９・・・ボンピング手段。
指定代理人
第１１Ｑ
第２図1 and 2 are sectional views showing different embodiments of the vacuum sealing device of the present invention. A...Atmospheric side, B-Exposed/vacuum side, 1...Vacuum chamber wall, 2...High speed rotating shaft, □3...Magnetic fluid seal, 7...Magnetic fluid, 8゛...low pressure chamber,
9... Bumping means. Designated Agent 11Q Figure 2
Claims (1)
ール装置。1. An empty sealing device is installed at the introduction part of the rotating shaft on the wall of the vacuum chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56189576A JPS5891968A (en) | 1981-11-26 | 1981-11-26 | Vacuum seal device for high-speed revolution shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56189576A JPS5891968A (en) | 1981-11-26 | 1981-11-26 | Vacuum seal device for high-speed revolution shaft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5891968A true JPS5891968A (en) | 1983-06-01 |
Family
ID=16243635
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56189576A Pending JPS5891968A (en) | 1981-11-26 | 1981-11-26 | Vacuum seal device for high-speed revolution shaft |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5891968A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003087636A1 (en) * | 2002-04-12 | 2003-10-23 | Advanced Fluid Systems Limited | Magnetic seal and bearing arrangement |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5419483U (en) * | 1977-07-12 | 1979-02-07 |
-
1981
- 1981-11-26 JP JP56189576A patent/JPS5891968A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5419483U (en) * | 1977-07-12 | 1979-02-07 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003087636A1 (en) * | 2002-04-12 | 2003-10-23 | Advanced Fluid Systems Limited | Magnetic seal and bearing arrangement |
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