JPH0586496B2 - - Google Patents
Info
- Publication number
- JPH0586496B2 JPH0586496B2 JP14178185A JP14178185A JPH0586496B2 JP H0586496 B2 JPH0586496 B2 JP H0586496B2 JP 14178185 A JP14178185 A JP 14178185A JP 14178185 A JP14178185 A JP 14178185A JP H0586496 B2 JPH0586496 B2 JP H0586496B2
- Authority
- JP
- Japan
- Prior art keywords
- hysteresis
- relative
- hysteresis material
- permanent magnets
- rotating body
- 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 - Fee Related
Links
- 238000006073 displacement reaction Methods 0.000 claims description 15
- 230000003139 buffering effect Effects 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 238000013016 damping Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 7
- 230000005389 magnetism Effects 0.000 description 3
- 230000002730 additional effect Effects 0.000 description 1
- 230000005415 magnetization Effects 0.000 description 1
- 239000000126 substance Substances 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
- F16F7/00—Vibration-dampers; Shock-absorbers
- F16F7/10—Vibration-dampers; Shock-absorbers using inertia effect
- F16F7/1022—Vibration-dampers; Shock-absorbers using inertia effect the linear oscillation movement being converted into a rotational movement of the inertia member, e.g. using a pivoted mass
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Vibration Prevention Devices (AREA)
- Vibration Dampers (AREA)
Description
【発明の詳細な説明】
（産業上の利用分野）
この発明は、例えば、発電所や化学プラント等
において、配管系等の被支持体を、地震等による
振動から保護するために、構築物等の支持体に防
振的に支持するための制振方法、あるいはそのた
めの制振器等として利用されるダンパの改良に関
するものである。Detailed Description of the Invention (Industrial Application Field) The present invention is used to protect supported bodies such as piping systems from vibrations caused by earthquakes, etc. in power plants, chemical plants, etc. The present invention relates to a vibration damping method for supporting a support body in a vibration-isolating manner, or to an improvement of a damper used as a vibration damper for that purpose.
（従来の技術）
従来、この種のダンパとして、例えば、被支持
体と支持体との間の、振動に伴う直線的相対運動
を、ボールねじ、ナツト等により回転体の回転運
動に変換し、この回転体の回転で発電機を回し、
その起電力を再び発電機に戻し、この発電機を逆
転するモータとして作用させ、これで制振作用を
行わせる形式のものが知られている。(Prior Art) Conventionally, this type of damper converts linear relative motion caused by vibration between a supported body and a support body into rotational motion of a rotating body using a ball screw, nut, etc. The rotation of this rotating body turns the generator,
A type of motor is known in which the electromotive force is returned to the generator, and the generator acts as a motor that reverses the rotation, thereby performing a vibration damping action.
（発明が解決しようとする問題点）
上記従来のダンパにあつては、発電機の回転速
度に振動エネルギ損失が比例するため、低サイク
ルの振動時におけるエネルギ損失が小さい。この
ため、比較的低サイクルの振動に対する十分な制
振効果が得られない、という問題点がある。(Problems to be Solved by the Invention) In the conventional damper described above, since the vibration energy loss is proportional to the rotational speed of the generator, the energy loss during low cycle vibration is small. Therefore, there is a problem in that a sufficient damping effect against relatively low cycle vibrations cannot be obtained.
この発明は、上記従来の問題点を解決し、比較
的低サイクルの振動に対しても十分な制振効果が
得られる緩衝方法と、そのためのダンパを提供し
ようとするものである。 The present invention aims to solve the above-mentioned conventional problems and provide a damping method that can obtain a sufficient damping effect even for relatively low-cycle vibrations, and a damper for the same.
（問題点を解決するための手段）
この発明においては、上記従来の問題点を解決
するため被支持体と支持体との間の相対変位をヒ
ステリシス材６と、このヒステリシス材６に対向
して設けられ、ヒステリシス材６に面した位置に
極性を相対変位方向へ交互に異ならしめて配列し
た永久磁石７との間の相対回転運動に変換し、両
者の相対移動に伴うヒステリシス損により、運動
エネルギを消費して緩衝作用を行うようにした。(Means for Solving the Problems) In order to solve the above-mentioned conventional problems, in the present invention, the relative displacement between the supported body and the support body is controlled by a hysteresis material 6 and a hysteresis material 6 facing the hysteresis material 6. The permanent magnets 7 arranged facing the hysteresis material 6 with alternating polarities in the direction of relative displacement convert the kinetic energy into relative rotational motion between the permanent magnets 7 and the hysteresis loss caused by the relative movement of the two. It is now consumed to provide a buffering effect.
また、上記緩衝方法を具体化するため、いずれ
か一方が配管系の如き被支持体へ、他方が構築物
の如き支持体へ夫々連結され、被支持体と支持体
との間の振動による相対変位に応動して軸線方向
に相対移動自在の二つの支持部材１，２と、二つ
の支持部材１，２間の相対変位をねじ軸４の如き
回転体の回転運動に変換するボールねじ、ナツト
３の如き変換装置とを備えたダンパにおいて、ね
じ軸４の如き回転体、又はこれと間隔を置いたそ
の近傍のいずれか一方にヒステリシス材６、他方
に複数の永久磁石７を夫々固着し、ヒステリシス
材６と永久磁石７とは相対回動しうるように相対
向させ、かつ永久磁石７はヒステリシス材６に面
した磁極の極性を相対回転方向へ交互に異ならし
めて配列してダンパを構成した。 In addition, in order to embody the above-mentioned buffering method, either one is connected to a supported body such as a piping system, and the other is connected to a supporting body such as a structure, so that relative displacement due to vibration between the supported body and the supporting body is two supporting members 1 and 2 that can be relatively moved in the axial direction in response to In a damper equipped with a converting device such as the one shown in FIG. The material 6 and the permanent magnets 7 are opposed to each other so as to be able to rotate relative to each other, and the permanent magnets 7 are arranged so that the polarities of the magnetic poles facing the hysteresis material 6 are alternately different in the direction of relative rotation to form a damper.
（作用）
支持体と被支持体との間に、熱変位による緩慢
な相対移動（１〜2μ／sec程度）が生じた場合、
変換装置を介して回転体が極めてゆつくりと回動
する。この場合、回転体の回動はほとんど制限さ
れることなく、従つて、支持体と被支持体との間
の相対変位は無理なく許容される。(Function) When a slow relative movement (approximately 1 to 2 μ/sec) occurs between the support and the supported body due to thermal displacement,
The rotating body rotates very slowly via the converter. In this case, the rotation of the rotating body is hardly restricted, and therefore, relative displacement between the support body and the supported body is allowed without difficulty.
これに対して、支持体と被支持体との間に、地
震等による急激な振動が生じた場合、ねじ軸４の
如き回転体は高速で回転を始め、ヒステリシス材
６と永久磁石７との間に相対回転が生じる。ヒス
テリシス材６は、これと対向する永久磁石７によ
つて磁化されている。ところが、両者間の相対回
転により、ヒステリシス材６は、永久磁石７の極
性が交互に反転するので、磁界の変化の影響を受
け、極性を移動させようとする。ヒステリシス材
６のある一部に注目すると、その磁気極性の変化
は、ヒステリシスループを描き、このループに囲
まれた面積に相当するエネルギを熱として消費す
る。即ち、このヒステリシス損により、振動の運
動エネルギを消費し、また残留磁気による磁気抵
抗で回転体にトルクを与え、回転体の制動効果を
得るものである。 On the other hand, when a sudden vibration occurs between the support and the supported body due to an earthquake or the like, the rotating body such as the screw shaft 4 starts rotating at high speed, causing the hysteresis material 6 and the permanent magnet 7 to A relative rotation occurs between them. The hysteresis material 6 is magnetized by a permanent magnet 7 facing it. However, due to the relative rotation between the two, the polarity of the permanent magnet 7 in the hysteresis material 6 is alternately reversed, so that the hysteresis material 6 tends to shift its polarity under the influence of changes in the magnetic field. Focusing on a certain part of the hysteresis material 6, changes in its magnetic polarity draw a hysteresis loop, and energy corresponding to the area surrounded by this loop is consumed as heat. That is, the hysteresis loss consumes the kinetic energy of vibration, and the magnetic resistance caused by residual magnetism imparts torque to the rotating body, thereby obtaining a braking effect on the rotating body.
（実施例）
一方の支持体である主筒１は、大径部１ａと、
小径部１ｂとを有する。大径部外方端には、引手
１ｃを有する。小径部１ｂ端は開放している。(Example) The main cylinder 1, which is one of the supports, has a large diameter portion 1a,
It has a small diameter portion 1b. The outer end of the large diameter portion has a handle 1c. The end of the small diameter portion 1b is open.
他方の支持部材たる副筒２は、外方端に引手２
ａを有し、内方端に主筒小径部１ｂ内へ軸線方向
出入り自在に挿入されている。副筒２の内方端に
は、ボールナツト３を有する。 The other supporting member, the sub-tube 2, has a handle 2 at its outer end.
a, and is inserted into the main cylinder small diameter portion 1b at its inner end so as to be freely axially movable in and out. The sub cylinder 2 has a ball nut 3 at its inner end.
回転体たるねじ軸４は、主筒１内の中間部に回
転自在に軸承され、主筒小径部１ｂ内において、
副筒２のボールナツト３に螺合している。このボ
ールナツト３とねじ軸４とで直線運動を回転運動
に変換する変換装置を構成している。 The screw shaft 4, which is a rotating body, is rotatably supported in the middle part of the main cylinder 1, and inside the main cylinder small diameter part 1b,
It is screwed into the ball nut 3 of the sub cylinder 2. This ball nut 3 and screw shaft 4 constitute a conversion device that converts linear motion into rotational motion.
また、ねじ軸４には、主筒大径部１ａ内におい
てヨーク材５が固着され、さらにその外筒に、ヒ
ステリシス材６が固着されている。ヒステリシス
材６は、比較的ヒステリシス損の大きい材料から
成る。 Further, a yoke material 5 is fixed to the screw shaft 4 within the main cylinder large diameter portion 1a, and a hysteresis material 6 is further fixed to the outer cylinder. The hysteresis material 6 is made of a material with relatively large hysteresis loss.
主筒大径部１ａの内側には、複数の永久磁石７
が固着されている。各永久磁石７は、夫々内側の
磁極が、交互に異なるように配置されている。 A plurality of permanent magnets 7 are provided inside the main cylinder large diameter portion 1a.
is fixed. The permanent magnets 7 are arranged such that their inner magnetic poles are alternately different.
次に、この実施例の作用を説明する。 Next, the operation of this embodiment will be explained.
このダンパは、主筒１又は副筒２のいずれか一
方を、被支持体に、他方を支持体に、夫々引手１
ｃ，２ａを介して接続して用いる。 This damper has one of the main cylinder 1 and the sub cylinder 2 as a supported body, and the other as a support body, and a handle 1, respectively.
It is used by connecting via c and 2a.
熱変位等による支持体と被支持体との間の緩慢
な変位で、ヒステリシス材６がゆつくり回動する
場合、それの磁気極性の変化は、ゆつくりとした
ものであるから、残留磁気による磁気抵抗はほと
んど生じず、従つて、被支持体の緩慢な相対変位
は無理なく許容される。 When the hysteresis material 6 rotates slowly due to slow displacement between the support and the supported material due to thermal displacement, etc., the change in magnetic polarity is gradual, so it is due to residual magnetism. Almost no magnetic resistance occurs, so slow relative displacement of the supported body is reasonably tolerated.
これに対して、地震時等のように、支持体と被
支持体との間の相対変位が急激である場合には、
ヒステリシス材６が、比較的高速で回転する。こ
のとき、永久磁石７によるヒステリシス材６の磁
化極性は、残留磁気により、対向永久磁石７の変
化に追従して変化することができず、ここに磁気
抵抗が生じるとともに、ヒステリシス損による運
動エネルギの消費が行われる。このため、ねじ軸
４に対する回転抵抗が生じ、これが制振力とな
る。 On the other hand, when the relative displacement between the supporting body and the supported body is sudden, such as during an earthquake,
Hysteresis material 6 rotates at a relatively high speed. At this time, the magnetization polarity of the hysteresis material 6 caused by the permanent magnet 7 cannot change to follow the change in the opposing permanent magnet 7 due to residual magnetism, and magnetic resistance occurs here, as well as kinetic energy loss due to hysteresis loss. Consumption takes place. Therefore, rotational resistance to the screw shaft 4 occurs, which becomes a damping force.
第３乃至５図の他の実施例では、主筒大径部１
ａ内において、ねじ軸４に、ヒステリシス材６の
ほか、円盤状ヨーク材１０が固着され、また、主
筒大径部１ａの内側には、軸線方向両端に磁極を
配置した環状永久磁石１１が固着されている。そ
して、この永久磁石１１を挟むように固着され
た、対向一対の環状ヨーク材１２の対向突部１２
ａが、円盤状ヨーク材１０の両側を、わずかに間
隔を置いて挟んでいる。その他の構成は、先の実
施例のものと実質的に同じであり、各図を通じ、
同一構成部には同一符号を付した。 In other embodiments shown in FIGS. 3 to 5, the main cylinder large diameter portion 1
In addition to the hysteresis material 6, a disk-shaped yoke material 10 is fixed to the screw shaft 4 in the inside of the main cylinder large-diameter portion 1a, and an annular permanent magnet 11 with magnetic poles arranged at both ends in the axial direction is mounted inside the main cylinder large-diameter portion 1a. It is fixed. Opposing protrusions 12 of a pair of opposing annular yoke members 12 are fixed so as to sandwich the permanent magnet 11 therebetween.
a are sandwiching both sides of the disc-shaped yoke material 10 with a slight interval therebetween. The other configurations are substantially the same as those of the previous embodiment, and throughout each figure,
Identical components are given the same reference numerals.
この実施例の場合、先の実施例と同様の作用の
他、ねじ軸４の回転により、円盤状ヨーク材１０
に渦電流が生じ、この渦電流損によつても同時に
振動エネルギの減衰を図ることができる、という
付加的作用を行う。 In this embodiment, in addition to the same effect as in the previous embodiment, the rotation of the screw shaft 4 causes the disk-shaped yoke material 10 to
An eddy current is generated in the eddy current, and this eddy current loss has the additional effect of attenuating the vibration energy at the same time.
なお、本発明は図示の実施例に限定されるもの
ではなく、例えば、ヒステリシス材６と永久磁石
７の配置を転換しても良いし、ヒステリシス材６
と永久磁石７とを、軸線方向に相対向して配置し
ても良い。また、主筒１、副筒２のような、各支
持部材の形状は問わないし、支持部材間の直線運
動を回転体の回転運動に変換する手段は、同等の
ものが他にも種々利用できる。 Note that the present invention is not limited to the illustrated embodiment; for example, the arrangement of the hysteresis material 6 and the permanent magnet 7 may be changed, or the hysteresis material 6 may be
and the permanent magnet 7 may be arranged to face each other in the axial direction. Further, the shape of each support member such as the main cylinder 1 and the sub-cylinder 2 does not matter, and various other equivalent means can be used for converting the linear motion between the support members into the rotational motion of the rotating body. .
（発明の効果）
以上説明してきたように、本発明においては被
支持体と支持体との間の相対変位をヒステリシス
材と、このヒステリシス材に対向して設けられ、
ヒステリシス材に面した位置に極性を交互に異な
らしめて相対変位方向へ配列した永久磁石との間
の相対回転運動に変換し、両者の相対移動に伴う
ヒステリシス損により、運動エネルギを消費して
緩衝作用を行うようにした。そして、ねじ軸４の
如き回転体、又はこれと間隔を置いたその近傍の
いずれか一方にヒステリシス材６、他方に複数の
永久磁石７を夫々固着し、ヒステリシス材６と永
久磁石７とは相対回動しうるように相対向させ、
かつ永久磁石７はヒステリシス材５に面した磁極
の極性を相対回転方向へ交互に異ならしめて配列
し、ダンパを構成した。この結果、振動エネルギ
の損失が、振動の速度に影響されず、比較的低サ
イクルの振動時ににおける振動エネルギ損失を大
きくすることができ、従つて、比較的低サイクル
の振動に対する十分な制振効果を、非接触で安定
的に発揮する緩衝方法とこれを実施するダンパが
得られる、という効果を有する。(Effects of the Invention) As explained above, in the present invention, the relative displacement between the supported body and the supporting body is controlled by a hysteresis material, provided opposite to this hysteresis material,
It converts into relative rotational motion between permanent magnets arranged in the direction of relative displacement with alternating polarities facing the hysteresis material, and kinetic energy is consumed due to hysteresis loss due to relative movement between the two, resulting in a buffering effect. I decided to do this. Then, a hysteresis material 6 is fixed to either one of a rotating body such as the screw shaft 4 or a spaced apart from the rotating body, and a plurality of permanent magnets 7 are fixed to the other side, and the hysteresis material 6 and the permanent magnets 7 are fixed to each other. facing each other so that it can rotate,
The permanent magnets 7 are arranged so that the polarity of the magnetic pole facing the hysteresis material 5 is alternately changed in the direction of relative rotation, thereby forming a damper. As a result, the vibration energy loss is not affected by the vibration speed, and the vibration energy loss during relatively low-cycle vibrations can be increased. Therefore, a sufficient vibration damping effect can be obtained for relatively low-cycle vibrations. This has the effect of providing a buffering method that stably exhibits the following without contact, and a damper that implements this method.
第１図は縦断正面図、第２図は第１図−線
断面図、第３図は他の実施例の縦断正面図、第４
図は第３図−線断面図、第５図は第３図−
線断面図である。
１……主筒（支持部材）、２……副筒（支持部
材）、３……ボールナツト（変換装置）、４……ね
じ軸（回転体）、６……ヒステリシス材、７……
永久磁石。
Fig. 1 is a longitudinal sectional front view, Fig. 2 is a sectional view taken along the line of Fig. 1, Fig. 3 is a longitudinal sectional front view of another embodiment, and Fig. 4
The figure is Fig. 3 - Line sectional view, Fig. 5 is Fig. 3 -
FIG. DESCRIPTION OF SYMBOLS 1... Main cylinder (supporting member), 2... Sub-cylinder (supporting member), 3... Ball nut (conversion device), 4... Screw shaft (rotating body), 6... Hysteresis material, 7...
permanent magnet.
Claims (1)
ヒステリシス材と、このヒステリシス材に対向し
て設けられ、ヒステリシス材に面した位置に極性
を相対変位方向へ交互に異ならしめて配列した永
久磁石との間の相対回転運動に変換し、両者の相
対移動に伴うヒステリシス損により、運動エネル
ギを消費して緩衝作用を行うようにしたことを特
徴とするヒステリシスを利用した緩衝方法。 ２ いずれか一方が被支持体へ、他方が支持体へ
夫々連結され、被支持体と支持体との間の相対変
位に応動して軸線方向に相対移動自在の二つの支
持部材と、前記二つの支持部材間の相対変位を回
転体の回転運動に変換する変換装置とを備えたダ
ンパにおいて、前記回転体、又はこれと間隔を置
いたその近傍のいずれか一方にヒステリシス材、
他方に複数の永久磁石を夫々固着し、ヒステリシ
ス材と永久磁石とは相対回転し得るように相対向
させ、かつ永久磁石はヒステリシス材に面した磁
極の極性を相対回転方向へ交互に異ならしめて配
列したことを特徴とするダンパ。[Claims] 1. Relative linear displacement between the supported body and the supporting body,
Converts the relative rotational motion between the hysteresis material and the permanent magnets arranged facing the hysteresis material with alternating polarities in the direction of relative displacement. A buffering method using hysteresis, characterized in that kinetic energy is consumed to provide a buffering effect due to hysteresis loss associated with hysteresis. 2. Two supporting members, one of which is connected to the supported body and the other to the supporting body, and which are movable relative to each other in the axial direction in response to relative displacement between the supported body and the supporting body; A damper equipped with a conversion device that converts relative displacement between two supporting members into rotational motion of a rotating body, a hysteresis material on either the rotating body or in the vicinity of the rotating body with a space therebetween;
A plurality of permanent magnets are respectively fixed to the other side, and the hysteresis material and the permanent magnets are opposed to each other so that they can rotate relative to each other, and the permanent magnets are arranged so that the polarity of the magnetic pole facing the hysteresis material is alternately changed in the direction of relative rotation. A damper characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14178185A JPS624937A (en) | 1985-06-28 | 1985-06-28 | Buffering method employing hysteresis and damper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14178185A JPS624937A (en) | 1985-06-28 | 1985-06-28 | Buffering method employing hysteresis and damper |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS624937A JPS624937A (en) | 1987-01-10 |
| JPH0586496B2 true JPH0586496B2 (en) | 1993-12-13 |
Family
ID=15300015
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14178185A Granted JPS624937A (en) | 1985-06-28 | 1985-06-28 | Buffering method employing hysteresis and damper |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS624937A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2020056448A (en) * | 2018-10-01 | 2020-04-09 | 株式会社免制震ディバイス | Eddy current type damper |
| CN111033078A (en) * | 2017-08-29 | 2020-04-17 | 日本制铁株式会社 | Vortex type vibration damper |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2575778B2 (en) * | 1988-02-24 | 1997-01-29 | 三和テッキ株式会社 | Magnetic adjustment damping device |
| JP2552111Y2 (en) * | 1989-12-28 | 1997-10-27 | 三和テッキ株式会社 | Generator braking type vibration suppression device |
| KR20020041261A (en) * | 2000-11-27 | 2002-06-01 | 강성덕 | Smart hybrid damper |
| ES2345711T3 (en) * | 2002-06-06 | 2010-09-30 | Kayaba Industry Co., Ltd. | ELECTROMAGNETIC SHOCK ABSORBER. |
| JP2004011750A (en) * | 2002-06-06 | 2004-01-15 | Kayaba Ind Co Ltd | Electromagnetic shock absorber |
| WO2016041116A1 (en) * | 2014-09-15 | 2016-03-24 | 陈政清 | Outer cup rotary axial eddy current damper |
| US10088006B2 (en) * | 2016-05-19 | 2018-10-02 | The Boeing Company | Rotational inerter and method for damping an actuator |
| JP6897525B2 (en) * | 2017-11-30 | 2021-06-30 | 日本製鉄株式会社 | Eddy current damper |
| JP7094756B2 (en) * | 2018-04-05 | 2022-07-04 | 株式会社免制震ディバイス | Mass damper |
| JP7101556B2 (en) * | 2018-07-27 | 2022-07-15 | 日本製鉄株式会社 | Eddy current damper |
| JP7050619B2 (en) * | 2018-08-03 | 2022-04-08 | 日本製鉄株式会社 | Eddy current damper |
| JP7040350B2 (en) * | 2018-08-03 | 2022-03-23 | 日本製鉄株式会社 | Eddy current damper |
| JP7040357B2 (en) * | 2018-08-17 | 2022-03-23 | 日本製鉄株式会社 | Eddy current damper |
-
1985
- 1985-06-28 JP JP14178185A patent/JPS624937A/en active Granted
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111033078A (en) * | 2017-08-29 | 2020-04-17 | 日本制铁株式会社 | Vortex type vibration damper |
| US11255407B2 (en) | 2017-08-29 | 2022-02-22 | Nippon Steel Corporation | Eddy current damper |
| JP2020056448A (en) * | 2018-10-01 | 2020-04-09 | 株式会社免制震ディバイス | Eddy current type damper |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS624937A (en) | 1987-01-10 |
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