JPS62237134A - Magnetic fluid damper - Google Patents
Magnetic fluid damperInfo
- Publication number
- JPS62237134A JPS62237134A JP8171886A JP8171886A JPS62237134A JP S62237134 A JPS62237134 A JP S62237134A JP 8171886 A JP8171886 A JP 8171886A JP 8171886 A JP8171886 A JP 8171886A JP S62237134 A JPS62237134 A JP S62237134A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic fluid
- drum
- magnetic
- cylinder
- magnets
- 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 37
- 230000000694 effects Effects 0.000 abstract description 8
- 238000013016 damping Methods 0.000 abstract 1
- 239000012530 fluid Substances 0.000 description 3
- BGPVFRJUHWVFKM-UHFFFAOYSA-N N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] Chemical compound N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] BGPVFRJUHWVFKM-UHFFFAOYSA-N 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 230000002238 attenuated effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000005339 levitation Methods 0.000 description 1
- 238000003754 machining Methods 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
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/53—Means for adjusting damping characteristics by varying fluid viscosity, e.g. electromagnetically
- F16F9/535—Magnetorheological [MR] fluid dampers
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Mechanical Engineering (AREA)
- Vibration Prevention Devices (AREA)
- Fluid-Damping Devices (AREA)
Abstract
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は、振動除去に使用されるダンパーに関する。[Detailed description of the invention] (Industrial application field) The present invention relates to a damper used for vibration removal.
（従来の技術）
近年、微細加工技術の発展に伴って、加工作業時に生じ
る振動が問題となり除振装置が数多く使用されている。(Prior Art) In recent years, with the development of microfabrication technology, vibrations generated during machining operations have become a problem, and many vibration isolators have been used.
従来、除振装置として使用されるダンパーには、流体の
粘性抵抗により振動を減衰させるオイルダンパーや、防
振ゴム等が使用されている。しかし、オイルダンパーは
、オリフィス等の付加装置が必要であり、防振ゴムでは
、低周波（１０Ｈｚ以下）の振動に対しては効果が期待
できないという欠点があった。Conventionally, as a damper used as a vibration isolator, an oil damper that damps vibrations by the viscous resistance of a fluid, a vibration isolating rubber, or the like has been used. However, the oil damper requires an additional device such as an orifice, and the anti-vibration rubber has the disadvantage that it cannot be expected to be effective against low-frequency (10 Hz or less) vibrations.
近年、磁性流体中の永久磁石のセルフセンタリング効果
を利用して、ダッシュポットを構成したダンパーが開発
されている。第４図にその構成を示す。即ち、非磁性シ
リンダー１９内に保持した磁性流体中１７に、永久磁石
を設けたピストン１８を自己浮揚させ、磁石のセルフセ
ンタリング効果によりピストンを安定位置に保持し受振
台１６に加わる振動を、磁性流体の粘性抵抗により減衰
させるものである。In recent years, a damper configured as a dashpot has been developed by utilizing the self-centering effect of a permanent magnet in a magnetic fluid. Figure 4 shows its configuration. That is, a piston 18 equipped with a permanent magnet is self-levitating in a magnetic fluid 17 held in a non-magnetic cylinder 19, and the piston is held in a stable position by the self-centering effect of the magnet. Attenuation is caused by the viscous resistance of the fluid.
（発明が解決しようとする問題点）
以上述べた磁性流体ダンパーにおいては、流体が低周波
の振動を伝達しにくいという性質と、セルフセンタリグ
効果により、ピストンを平衡位置に保持できるため、電
気的フィードパ、ンク回路が不要であるなど改善されて
いるものの、磁性流体中の体積力により浮揚できる物体
は、比重が磁性流体自身の４倍程度までであり、また回
転方向のねじれ振動に対してはほとんど効果を持たない
という欠点があった。(Problems to be Solved by the Invention) In the above-mentioned magnetic fluid damper, the piston can be maintained at an equilibrium position due to the property that the fluid is difficult to transmit low-frequency vibrations and the self-centering effect. Although improvements have been made, such as eliminating the need for feed pumps and link circuits, objects that can be levitated by the body force in a magnetic fluid have a specific gravity of up to four times that of the magnetic fluid itself, and are resistant to torsional vibration in the direction of rotation. The drawback was that it had almost no effect.
本発明の目的は、このような欠点を除去し、自己浮揚さ
せるピストンを大型化しても安定に動作し、さらに回転
方向にも制動力の大きいダンパーを提供することにある
。An object of the present invention is to eliminate such drawbacks, to provide a damper that operates stably even when the self-levitating piston is enlarged, and that also has a large braking force in the rotational direction.
（問題点を解決するための手段）
本発明の磁性流体ダンパーは、非磁性シリンダー内に封
入した磁性流体中に円筒ドラムを設は該シリンダーと円
筒ドラムに設けた永久磁石または電磁石間に働く磁気的
反発力により、該ドラムを磁性流体Ｌ：１月二安定に浮
揚せしめ、該ドラムに接続したシャフトにより、受振部
をささえるようにしたことを特徴としている。(Means for Solving the Problems) The magnetic fluid damper of the present invention includes a cylindrical drum in a magnetic fluid sealed in a non-magnetic cylinder, and a magnetic field that acts between the cylinder and a permanent magnet or electromagnet provided on the cylindrical drum. The drum is made to float stably in the magnetic fluid L by the magnetic repulsion force, and the vibration receiver is supported by a shaft connected to the drum.
（作用）
本発明においては、シリンダーとピストンの両方に設け
た磁石により、磁性流体中の体積力に加えて、両磁石間
の磁気的反発力を利用して、ドラムを磁性流体中に浮揚
させている。また、磁石をドラムと、シリンダに等角度
間隔で設けることにより回転方向の振動に対しても磁気
的反発力が働き、かつ、磁性流体の粘性により、すみや
かに振動を減衰させることができる。(Function) In the present invention, the magnets provided in both the cylinder and the piston make use of the body force in the magnetic fluid as well as the magnetic repulsion between the two magnets to levitate the drum in the magnetic fluid. ing. Further, by providing magnets on the drum and the cylinder at equal angular intervals, a magnetic repulsion force acts against vibrations in the rotational direction, and the vibrations can be quickly damped by the viscosity of the magnetic fluid.
（実施例） 次に図面を参照して本発明の実施例について説明する。(Example) Next, embodiments of the present invention will be described with reference to the drawings.
第１図は、一実施例を示す断面図でシリンダー１に取付
けた磁石２と、ドラム５に取り付けた磁石４により、磁
性流体３中にドラム５は、安定に自己浮揚している。ド
ラム５に回転トルクが加わると、ドラムの磁石４とシリ
ンダーの磁石２の同極間に働く磁気的反発力によりドラ
ムは振動するが磁性流体の粘性抵抗により、振動はすみ
やかに減衰する。また、ドラムとシリンダーは非接触で
あり、磁性流体は低周波の振動を伝えにくいため、低周
波の振動に対しても効果を有する。さらに、磁石間に働
く磁気的反発力は、磁性流体の自己浮揚力よりも非常に
大きくできるため、大きな荷重をかけた場合でも充分な
制動力が得られる。FIG. 1 is a sectional view showing one embodiment, and the drum 5 is stably self-levitating in the magnetic fluid 3 by the magnet 2 attached to the cylinder 1 and the magnet 4 attached to the drum 5. When rotational torque is applied to the drum 5, the drum vibrates due to the magnetic repulsion force acting between the same poles of the drum magnet 4 and the cylinder magnet 2, but the vibration is quickly attenuated due to the viscous resistance of the magnetic fluid. Furthermore, since the drum and cylinder are not in contact with each other and the magnetic fluid is difficult to transmit low frequency vibrations, it is also effective against low frequency vibrations. Furthermore, since the magnetic repulsion force acting between the magnets can be much larger than the self-levitation force of the magnetic fluid, sufficient braking force can be obtained even when a large load is applied.
第２図は、本実施例のダンパーの断面と、受振部６を上
から見た図である。図で６は受振部、７はシャフト、８
はシール軸受、９はシリンダー、１０は磁石、１１は磁
性流体、１２は回転ドラムである。受振部６に加わる振
動を先に述べたように、ドラム１２に加わる磁性流体１
１の粘性抵抗により、減衰させる。ここでは、磁性流体
をシリンダー内に保持するために磁性流体シール８を用
いている。第３図は、本実施例の磁性流体ダンパーを横
から見た図である。図で１３は受振部、１４は磁性流体
ダンパー、１５はシャフトである。受振部１３は、磁石
の反発力を用いて保持しているため、磁性流体の体積力
のみの場合よりかなり型部の大きいものでも支持可能で
ある。FIG. 2 is a cross-sectional view of the damper of this embodiment and a view of the vibration receiver 6 viewed from above. In the figure, 6 is the vibration receiver, 7 is the shaft, and 8
9 is a sealed bearing, 9 is a cylinder, 10 is a magnet, 11 is a magnetic fluid, and 12 is a rotating drum. As mentioned above, the vibration applied to the vibration receiver 6 is caused by the magnetic fluid 1 applied to the drum 12.
It is damped by the viscous resistance of 1. Here, a magnetic fluid seal 8 is used to retain the magnetic fluid within the cylinder. FIG. 3 is a side view of the magnetic fluid damper of this embodiment. In the figure, 13 is a vibration receiver, 14 is a magnetic fluid damper, and 15 is a shaft. Since the vibration receiving part 13 is held using the repulsive force of the magnet, it is possible to support even a part having a considerably larger mold part than in the case of using only the body force of the magnetic fluid.
本実施例では、第１図に示すように磁石を９０°間かく
で配置したが、これは等間かくであればよい、またシリ
ンダーの磁石を電磁石にして、磁場の反発力を制御すれ
ば任意の荷重に対するダンパーを作ることができる。ま
た本実施例では、上下方向の振動に対して、用いたがね
じれダンパーとして用いても充分な効果を得ることがで
きる。In this example, the magnets were placed at 90° intervals as shown in Figure 1, but it is sufficient if they are evenly spaced.Also, if the cylinder magnets are electromagnets and the repulsive force of the magnetic field is controlled. You can create a damper for any load. Further, in this embodiment, the damper is used for vibration in the vertical direction, but sufficient effects can be obtained even if the damper is used as a torsional damper.
（発明の効果）
本発明はこのように、磁性流体の体積力と、磁石間の磁
気的反発力を利用することにより、大荷重に対して有効
でねじれに対しても有効なダンパーを得ることができる
という効果を有する。(Effects of the Invention) As described above, the present invention utilizes the body force of the magnetic fluid and the magnetic repulsion between the magnets to obtain a damper that is effective against large loads and is also effective against torsion. It has the effect of being able to.
第１図ないし、第３図は本発明の一実施例を示す図、第
４図は、従来の磁性流体ダンパーのＩｆｉ−面図である
。
図において
１・・・・シリンダー、２・・・・磁石、３・・・・磁
性流体、４・・・・磁石、５・・・・ドラム、６・・・
・受振部、７・・・・シャフト、８・・・・シール、９
・・・・シリンダー、１０・・・・磁石、１１・・・・
磁性流体、１２・・・・ドラム、１３・・・・受振部、
１４・・・・磁性流体ダンパー、１５・・・・シャフト
、１６・・・・受振部、１７・・・・磁性流５ ろ４
：石舷石
３：訪姓琥林
第 Ｚ 図
２： づヒル艮音ｒ ７；シリンダパ−７：シャ
フト Ａ：る収面
８ニジ−）ｌ、、 ＩＩ：訪ノ雌流林第 ３ 図
対：シャフト
５・１・１
第４ 図
ん
／７：虐硯〕林
Ａデ： ビＸト、ン
／２： シリンダニ1 to 3 are views showing one embodiment of the present invention, and FIG. 4 is an Ifi-plane view of a conventional magnetic fluid damper. In the figure, 1... cylinder, 2... magnet, 3... magnetic fluid, 4... magnet, 5... drum, 6...
・Receiver section, 7...Shaft, 8...Seal, 9
...Cylinder, 10...Magnet, 11...
Magnetic fluid, 12... drum, 13... vibration receiver,
14... Magnetic fluid damper, 15... Shaft, 16... Vibration receiver, 17... Magnetic flow 5 Filter 4
:Stone stone 3: Visitor's home 3rd figure :Shaft 5・1・1 4th Zukan/7: Apocalypse] Hayashi Ade: BiXto, N/2: Cylindani
Claims (1)
ムを設け、該ドラムの表面及び該シリンダーの内壁に複
数個の磁石をシリンダーの磁石と、ドラムの磁石の同極
が向い合うように設置し、該シリンダー内を磁性流体で
満たし、両開口部に設けたシール軸受を通して円筒ドラ
ムに接続されたシャフトにより受振部を保持するように
したことを特徴とする磁性流体ダンパー。A cylindrical drum is provided in a non-magnetic cylinder with openings at both ends, and a plurality of magnets are installed on the surface of the drum and the inner wall of the cylinder so that the same poles of the cylinder's magnet and the drum's magnet face each other. A magnetic fluid damper characterized in that the inside of the cylinder is filled with magnetic fluid, and the vibration receiving part is held by a shaft connected to the cylindrical drum through sealed bearings provided at both openings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8171886A JPS62237134A (en) | 1986-04-08 | 1986-04-08 | Magnetic fluid damper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8171886A JPS62237134A (en) | 1986-04-08 | 1986-04-08 | Magnetic fluid damper |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62237134A true JPS62237134A (en) | 1987-10-17 |
Family
ID=13754188
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8171886A Pending JPS62237134A (en) | 1986-04-08 | 1986-04-08 | Magnetic fluid damper |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62237134A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2564416A (en) * | 2017-07-07 | 2019-01-16 | Edwards Ltd | Damper |
| CN110159863A (en) * | 2019-06-04 | 2019-08-23 | 北京石油化工学院 | A kind of pipeline MR damper based on active control |
| CN113074209A (en) * | 2021-03-16 | 2021-07-06 | 广西科技大学 | Miniature magneto-rheological vibration damper |
-
1986
- 1986-04-08 JP JP8171886A patent/JPS62237134A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2564416A (en) * | 2017-07-07 | 2019-01-16 | Edwards Ltd | Damper |
| CN110159863A (en) * | 2019-06-04 | 2019-08-23 | 北京石油化工学院 | A kind of pipeline MR damper based on active control |
| CN110159863B (en) * | 2019-06-04 | 2020-12-01 | 北京石油化工学院 | Pipeline magnetorheological damper based on active control |
| CN113074209A (en) * | 2021-03-16 | 2021-07-06 | 广西科技大学 | Miniature magneto-rheological vibration damper |
| CN113074209B (en) * | 2021-03-16 | 2022-08-26 | 广西科技大学 | Miniature magneto-rheological vibration damper |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP2648415B2 (en) | Washing machine vibration and noise suppression device | |
| US4667942A (en) | Pretensionable and hydraulically damped mounting element | |
| US3856200A (en) | Damping device for rapidly spinning rotary body | |
| KR20010095319A (en) | Bearing of a engine-gear unit | |
| US5918862A (en) | High damping pneumatic isolator | |
| JPS62237134A (en) | Magnetic fluid damper | |
| JP2000199541A (en) | Vibration suspension device | |
| JPS599312A (en) | Magnetic bearing applied with magnetic fluid | |
| JPS6334113B2 (en) | ||
| JP3680905B2 (en) | Torsional damper | |
| GB802579A (en) | Improvements relating to antivibration mountings | |
| US2208064A (en) | Spring device | |
| JPH0884454A (en) | Damping apparatus for rotary machine | |
| KR20140038327A (en) | Mount using magnet force | |
| JP2676124B2 (en) | Cylindrical vibration isolator | |
| JPH028528A (en) | Vibration damper device | |
| JPS60256638A (en) | Vibration damping device | |
| JP2015052351A (en) | Fluid filled type vibration control device | |
| JPS61116141A (en) | Vibration damping equipment | |
| JPS6231720A (en) | Damper device of magnetic bearing | |
| JPH11325175A (en) | Suspending and sliding combined type base isolation/ vibration control structure | |
| RU2084718C1 (en) | Magnetic bearing unit | |
| JPH0433481Y2 (en) | ||
| JPS6119220Y2 (en) | ||
| SU1173089A1 (en) | Vibroinsulator |