JPH034781B2 - - Google Patents
Info
- Publication number
- JPH034781B2 JPH034781B2 JP2836785A JP2836785A JPH034781B2 JP H034781 B2 JPH034781 B2 JP H034781B2 JP 2836785 A JP2836785 A JP 2836785A JP 2836785 A JP2836785 A JP 2836785A JP H034781 B2 JPH034781 B2 JP H034781B2
- Authority
- JP
- Japan
- Prior art keywords
- weight
- dynamic vibration
- vibration absorber
- air
- cylinder
- 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
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
- F16F7/104—Vibration-dampers; Shock-absorbers using inertia effect the inertia member being resiliently mounted
-
- 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
- F16F9/42—Cooling arrangements
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bridges Or Land Bridges (AREA)
- Vibration Prevention Devices (AREA)
- Fluid-Damping Devices (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は橋梁等の構造物の共振を抑制するため
の動吸振器の改良に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an improvement in a dynamic vibration absorber for suppressing resonance of structures such as bridges.
動吸振器は、共振を抑制しようとする構造物の
共振振動数と等しい共振振動数を有する１自由度
振動系であつて、これを構造物に設置することに
より、構造物の共振振幅を減少させることができ
るものである。
A dynamic vibration absorber is a one-degree-of-freedom vibration system that has a resonance frequency equal to the resonance frequency of the structure whose resonance is to be suppressed, and by installing it on the structure, it reduces the resonance amplitude of the structure. It is something that can be done.
第３図は従来の動吸振器の一部断面図で、１は
重錘、２は基板、３はオイル５を充満したシリン
ダ４と、ピストン６とよりなるオイルダンパ、７
はコイルスプリングである。重錘１はコイルスプ
リング７などのばね要素によつて支えられてお
り、オイルダンパ３などの減衰要素によつて適当
な減衰が与えられているのである。 FIG. 3 is a partial cross-sectional view of a conventional dynamic vibration absorber, in which 1 is a weight, 2 is a substrate, 3 is an oil damper consisting of a cylinder 4 filled with oil 5 and a piston 6, and 7
is a coil spring. The weight 1 is supported by a spring element such as a coil spring 7, and is appropriately damped by a damping element such as an oil damper 3.
ところで、この減衰要素であるオイルダンパ３
は、構造物の振動エネルギーを吸収するので発熱
し、オイル５の温度が上昇してくる。一般に減衰
要素の特性は温度に依存するところ大きく、過度
の温度上昇により、動吸振器の性能が変化する可
能性がある。従つて過度の温度上昇を避けるた
め、オイルダンパ３の容積を大きくして熱容量を
大きくしたり、放熱板を設けて冷却効果を図るな
どの方法をとつているが、そのために装置が大形
化するのが問題であつた。
By the way, the oil damper 3 which is this damping element
absorbs the vibration energy of the structure and generates heat, causing the temperature of the oil 5 to rise. In general, the characteristics of damping elements are highly dependent on temperature, and an excessive rise in temperature may change the performance of the dynamic vibration reducer. Therefore, in order to avoid excessive temperature rise, methods such as increasing the volume of the oil damper 3 to increase its heat capacity and providing a heat sink to achieve a cooling effect are taken, but this increases the size of the device. The problem was to do so.
本発明は以上述べたような従来の動吸振器の欠
点を解消した効果的な動吸振器を提供しようとす
るものである。 The present invention aims to provide an effective dynamic vibration absorber that eliminates the drawbacks of conventional dynamic vibration absorbers as described above.
動吸振器において、円形の基板の中央にオイル
シリンダを装着し、該オイルシリンダを囲つて、
円筒状に形成した重錘を上記オイルシリンダと同
心円状に配設し、上記重錘と基板との間に複数個
のばねを介在せしめるとともに、上記重錘の上端
面に固着した天板の中心部に装着されたピストン
を、前記オイルシリンダ中に挿嵌する。又上記重
錘の外周面の下端部と基板とをゴムベローズで接
続して、上記重錘と天板と基板とゴムベローズと
で閉空間を構成し、天板には弁を備えた空気流出
口を、基板には弁を備えた空気流入口をそれぞれ
１個又は複数個設ける。
In a dynamic vibration absorber, an oil cylinder is mounted in the center of a circular base plate, and the oil cylinder is surrounded.
A cylindrical weight is disposed concentrically with the oil cylinder, a plurality of springs are interposed between the weight and the base plate, and the center of a top plate is fixed to the upper end surface of the weight. The piston attached to the section is inserted into the oil cylinder. The lower end of the outer circumferential surface of the weight and the board are connected with a rubber bellows, and the weight, the top plate, the board, and the rubber bellows constitute a closed space, and the top plate is equipped with a valve for air flow. The substrate is provided with one or more air inlets each having an outlet and a valve.
上記動吸振器が作動して重錘が上下振動する
と、重錘の上昇時は、基板の空気流入口より外気
が動吸振器内部に流入し、重錘が下降するとき
は、動吸振器内の空気は天板の空気流出口より外
部へ流出するので、前記重錘の上下振動により絶
えず外気が動吸振器内に出入することとなる。こ
のためオイルシリンダの外面を絶えず空気が流れ
ることになり、発熱したオイルダンパは空気によ
り冷却されるのである。特に重錘の作動振幅が大
きく発熱量も大きい場合は、空気の流入出量も多
くなつて冷却効果が大きくなり、逆の場合は小さ
くなる。この冷却効果により動吸振器の特性は安
定し、熱容量を増加させるためにシリンダを大き
くする必要もなく、小形高性能の動吸振器を実現
しうることとなる。
When the above-mentioned dynamic vibration absorber operates and the weight vibrates up and down, when the weight is rising, outside air flows into the dynamic vibration absorber from the air inlet of the board, and when the weight is descending, the air is inside the dynamic vibration absorber. Since the air flows out from the air outlet of the top plate, the vertical vibration of the weight causes outside air to constantly flow in and out of the dynamic vibration absorber. Therefore, air constantly flows over the outer surface of the oil cylinder, and the oil damper, which generates heat, is cooled by the air. In particular, if the operating amplitude of the weight is large and the amount of heat generated is large, the amount of air flowing in and out will also be large and the cooling effect will be large, whereas in the opposite case it will be small. This cooling effect stabilizes the characteristics of the dynamic vibration absorber, and there is no need to increase the size of the cylinder to increase heat capacity, making it possible to realize a small, high-performance dynamic vibration absorber.
第１図は本発明の一実施例を示す動吸振器の断
面図及び平面図である。図中２〜７は従来装置の
相当部品である。１１は円筒状に形成された重
錘、１２はその上端面に固着された天板、１３は
ゴムベローズ、１４は空気流入口、１５は空気流
出口、１６はその弁である。
FIG. 1 is a sectional view and a plan view of a dynamic vibration absorber showing an embodiment of the present invention. In the figure, numerals 2 to 7 are equivalent parts of the conventional device. 11 is a cylindrical weight, 12 is a top plate fixed to its upper end surface, 13 is a rubber bellows, 14 is an air inlet, 15 is an air outlet, and 16 is a valve thereof.
第１図に示すように、基板２の中央にオイル５
を充満したオイルシリンダ４を装着し、このオイ
ルシリンダ４を囲つて円筒状重錘１１を基板２と
の間に複数個のコイルスプリング７を介して配設
する。該円筒状重錘１１の上端には天板１２が固
着され、天板１２の中央部に固着されたピストン
６がオイルシリンダ４内に挿嵌されている。又上
記円筒状重錘１１の外周面の下端と基板２とをゴ
ムベローズ１３で接続し、円筒状重錘１１と天板
１２と基板２とゴムベローズ１３とで閉空間を構
成している。さらに基板２および天板１２に弁１
６を備えた１個又は複数個の空気流入口１４及び
空気流出口１５を設ける。 As shown in FIG.
An oil cylinder 4 filled with water is mounted, and a cylindrical weight 11 is disposed surrounding the oil cylinder 4 with a plurality of coil springs 7 interposed between it and the base plate 2. A top plate 12 is fixed to the upper end of the cylindrical weight 11, and a piston 6 fixed to the center of the top plate 12 is inserted into the oil cylinder 4. Further, the lower end of the outer peripheral surface of the cylindrical weight 11 and the base plate 2 are connected by a rubber bellows 13, and the cylindrical weight 11, the top plate 12, the base plate 2, and the rubber bellows 13 constitute a closed space. Furthermore, the valve 1 is attached to the base plate 2 and the top plate 12.
One or more air inlets 14 and air outlets 15 with 6 are provided.
円筒状重錘１１が構造物の振動に共振して上下
振動を行なうたびに、前記空気流入口および空気
流出口より外気が動吸振器内に流入及び流出し
て、オイルシリンダ４は外気により絶えず冷却さ
れることとなり、動吸振器の特性は安定する。 Every time the cylindrical weight 11 resonates with the vibration of the structure and vibrates up and down, outside air flows into and out of the dynamic vibration absorber through the air inlet and air outlet, and the oil cylinder 4 is constantly affected by the outside air. As a result, the characteristics of the dynamic vibration absorber become stable.
なお上記実施例では、空気の流入口１４および
流出口１５は、基板２及び天板１２に設けられて
いるが、この位置は基板、天板に限らない。特に
空気流入口１４はパイプなどを利用して外部に延
長し、例えば構造物の日陰の部分の低温の空気、
あるいは比較的温度変化の少ない地下の空気を流
入せしめるようにしてもよい。 In the above embodiment, the air inlet 14 and air outlet 15 are provided on the substrate 2 and the top plate 12, but their positions are not limited to the substrate and the top plate. In particular, the air inlet 14 is extended to the outside using a pipe or the like, so that, for example, low-temperature air in a shaded part of the structure,
Alternatively, underground air with relatively little temperature change may be allowed to flow in.
またオイルシリンダ４の表面形状等を工夫し
て、冷却効果を上げることもできる。 Furthermore, the cooling effect can be improved by modifying the surface shape of the oil cylinder 4, etc.
さらに第２図に示す形状のゴムベローズ１７を
使用して、重錘が上下動するたびに一点鎖線に示
すように変化させ、空気の流入出量を増加させる
こともできるし、ゴムベローズ以外の蛇腹状のも
の、あるいはその他の伸縮可能なものを用いても
よい。 Furthermore, by using a rubber bellows 17 having the shape shown in Fig. 2, it is possible to increase the amount of air inflow and outflow by changing it as shown by the dashed line every time the weight moves up and down. A bellows-like material or other expandable material may also be used.
また、本発明はオイルダンパ、コイルスプリン
グ以外の形式の減衰要素やばね要素にも応用でき
る。 Furthermore, the present invention can be applied to damping elements and spring elements of types other than oil dampers and coil springs.
本発明は動吸振器を前述のように構成し、重錘
の上下振動の度に外部の空気を動吸振器内に流入
出させ、オイルシリンダを冷却せしめたので、動
吸振器の特性を安定させ、その形状を小型化せし
めるという優れた効果を上げることができた。
The present invention has a dynamic vibration reducer configured as described above, and each time the weight vibrates up and down, external air flows into and out of the dynamic vibration absorber to cool the oil cylinder, thereby stabilizing the characteristics of the dynamic vibration absorber. We were able to achieve the excellent effect of making the shape more compact.
第１図は本発明の一実施例を示す動吸振器の断
面図と平面図、第２図は本発明の他の実施例を示
す一部断面図、第３図は従来の動吸振器の断面図
である。
図中２は基板、４はオイルシリンダ、５はオイ
ル、６はピストン、７はコイルスプリング、１１
は円筒状重錘、１２は天板、１３はゴムベロー
ズ、１４は空気流入口、１５は空気流出口、１６
はその弁である。
Fig. 1 is a sectional view and a plan view of a dynamic vibration absorber showing one embodiment of the present invention, Fig. 2 is a partial sectional view showing another embodiment of the invention, and Fig. 3 is a diagram of a conventional dynamic vibration absorber. FIG. In the figure, 2 is a board, 4 is an oil cylinder, 5 is oil, 6 is a piston, 7 is a coil spring, 11
12 is a cylindrical weight, 12 is a top plate, 13 is a rubber bellows, 14 is an air inlet, 15 is an air outlet, 16
is the valve.
Claims (1)
１個又は複数個の空気流入口を備えた基板と、該
基板の中心部に装着されたオイルシリンダーと、
該シリンダを囲り、上記基板との間に複数個のば
ねを介して、該シリンダと同心円状に配設された
円筒状の重錘と、該重錘の上端面に固着され、そ
の中心部に上記シリンダに挿嵌するピストンを装
着するとともに、弁を有する１個又は複数個の空
気流出口を備えた天板と、前記重錘の外周面の下
端部と前記基板との間を接続するゴムベローズと
より構成されており、上記重錘の上下動により生
ずるゴムベローズと重錘とで囲まれた空間の体積
変化により内部の空気が流入、流出を繰り返すこ
とを特徴とする動吸振器。1. In a dynamic vibration absorber, the dynamic vibration absorber includes a base plate having one or more air inlets each having a valve, and an oil cylinder attached to the center of the base plate.
A cylindrical weight that surrounds the cylinder and is arranged concentrically with the cylinder through a plurality of springs between the cylinder and the base plate, and a cylindrical weight that is fixed to the upper end surface of the weight and that has a center portion. A piston to be inserted into the cylinder is installed, and a top plate having one or more air outlets having a valve is connected between the lower end of the outer peripheral surface of the weight and the base plate. A dynamic vibration absorber comprising a rubber bellows, and characterized in that internal air repeatedly flows in and out due to a change in volume of a space surrounded by the rubber bellows and the weight caused by the vertical movement of the weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2836785A JPS61189337A (en) | 1985-02-18 | 1985-02-18 | Dynamic vibration reducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2836785A JPS61189337A (en) | 1985-02-18 | 1985-02-18 | Dynamic vibration reducer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61189337A JPS61189337A (en) | 1986-08-23 |
| JPH034781B2 true JPH034781B2 (en) | 1991-01-23 |
Family
ID=12246652
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2836785A Granted JPS61189337A (en) | 1985-02-18 | 1985-02-18 | Dynamic vibration reducer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61189337A (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03292430A (en) * | 1990-04-09 | 1991-12-24 | Jdc Corp | Viscous damper and earthquake-proof system which has viscous damper |
| KR100927954B1 (en) | 2009-09-15 | 2009-11-24 | 유노빅스이엔씨(주) | Seismic Spring Damper Mount |
| CN101839066B (en) * | 2010-06-11 | 2011-09-28 | 三一重工股份有限公司 | Tail end hose device, concrete pump vehicle and pipeline transporter |
| JP2012032004A (en) * | 2011-10-20 | 2012-02-16 | Jeol Ltd | Vibration isolation mechanism |
| CN113356034A (en) * | 2021-07-06 | 2021-09-07 | 哈尔滨工业大学 | Damper vibration reduction system for inhibiting bridge vibration and implementation method |
-
1985
- 1985-02-18 JP JP2836785A patent/JPS61189337A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61189337A (en) | 1986-08-23 |
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