JP2708444B2 - Supporting method of auxiliary vibration system of dynamic vibration absorber - Google Patents
Supporting method of auxiliary vibration system of dynamic vibration absorberInfo
- Publication number
- JP2708444B2 JP2708444B2 JP63006778A JP677888A JP2708444B2 JP 2708444 B2 JP2708444 B2 JP 2708444B2 JP 63006778 A JP63006778 A JP 63006778A JP 677888 A JP677888 A JP 677888A JP 2708444 B2 JP2708444 B2 JP 2708444B2
- Authority
- JP
- Japan
- Prior art keywords
- weight
- vibration
- machine
- support
- spring
- 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 - Lifetime
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
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bridges Or Land Bridges (AREA)
- Vibration Prevention Devices (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 本発明は、産業機械などの防振装置として、あるい
は、橋梁などの構造物の制振装置として使用される動吸
振器の副振動系の支持方法に関するものである。Description: BACKGROUND OF THE INVENTION The present invention relates to a method of supporting a sub-vibration system of a dynamic vibration absorber used as a vibration damping device for an industrial machine or a vibration damping device for a structure such as a bridge. It is about.
従来の技術 例えば、産業機械などを防振支持するための動吸振器
の典型的な配置例としては、添付図面の第２図に示すよ
うに、重量W1を有する産業機械など１を、支持物Ｇの上
にばね定数K1を有する支持ばね２により弾性支持し、そ
の振動を一層制限するために副振動系として、機械など
１の上に、重量W2の重錘３を、ばね定数K2を有する支持
ばね４を介して直列的に配置し、これらの重錘３及び支
持ばね４とにより副振動系を形成している。Description of the Related Art For example, a typical arrangement example of the dynamic vibration reducer for vibration-damping support of industrial machinery, as shown in Figure 2 of the accompanying drawings, one industrial machines having a weight W 1, the support elastically supported by a supporting spring 2 having a spring constant K 1 on the object G, as secondary vibration system in order to further limit the vibrations on the machine, such as 1, the weight 3 weight W 2, the spring constant They are arranged in series via a support spring 4 having K 2 , and the weight 3 and the support spring 4 form a sub-vibration system.
この場合、副振動系の支持ばね４は、同図に示すよう
に、圧縮型として使用される時は、重錘３の重量W2によ
り、たわんで取り付けられる。In this case, the support spring 4 of the secondary vibration system, as shown in the figure, when used as a compression type, the weight W 2 of the weight 3 is attached bends.
また、この形式の副振動系においては、その支持ばね
４は、産業機械など１の加振振動数と共振させるよう
に、そのばね定数K2を決定しなければならない。そこ
で、このために必要とされる支持ばね４のたわみδを計
算すると、副振動系の固有振動数をｆ、重力加速度をｇ
として、次の式、すなわち δ＝g/（２πｆ）２ で現される。In the auxiliary vibration system of this type, the support spring 4, as to resonate with vibration frequency of industrial machinery such as 1, must be determined that the spring constant K 2. Therefore, when the deflection δ of the support spring 4 required for this is calculated, the natural frequency of the sub-vibration system is f, and the gravitational acceleration is g.
Is expressed by the following equation: δ = g / (2πf) 2 .
これを、数値例により示すと、ｆを300回転/min（5.0
Hz）とすると δ＝9800/（２×3.14×５）２＝9.94mm となる。If this is shown by a numerical example, f is set to 300 rotations / min (5.0
Hz), δ = 9800 / (2 x 3.14 x 5) 2 = 9.94 mm.
このように、従来の動吸振器の副振動系においては、
防振すべき機械など１（重力W1）の加振力によって発生
する重錘３（重量W2）の動変位を、上式により与えられ
る値δよりも小さくなるように、重錘３の重量W2を決定
する必要があった。Thus, in the sub vibration system of the conventional dynamic vibration absorber,
In order to make the dynamic displacement of the weight 3 (weight W 2 ) generated by the excitation force of 1 (gravity W 1 ) such as the machine to be anti-vibration smaller than the value δ given by the above equation, it was necessary to determine the weight W 2.
なお、上記の従来例においては、副振動系の支持ばね
４を圧縮ばねとして使用するものとしてあるが、この支
持ばね４を、その支持手段の変更により、引っ張りばね
として使用することも、無論、可能なところである。In the above-described conventional example, the supporting spring 4 of the auxiliary vibration system is used as a compression spring. However, it is needless to say that the supporting spring 4 can be used as a tension spring by changing the supporting means. Where possible.
いずれにしても、このように、従来の動吸振器におい
ては、防振すべき機械などに、その振動数に共振するよ
うに取り付けられている副振動系において、その副振動
系を形成している支持ばね４のたわみが、加振振動数と
共振させるために上記の数値例に示すような一定値とな
り、重量W2を有する重錘３の動変位をこの値よりも小さ
くするように、重錘３の重量W2を決定しなければならな
いという問題点があった。In any case, as described above, in the conventional dynamic vibration absorber, a sub-vibration system is formed in a sub-vibration system attached to a machine to be subjected to vibration isolation so as to resonate at the frequency. The deflection of the supporting spring 4 becomes a constant value as shown in the above numerical example in order to resonate with the excitation frequency, and the dynamic displacement of the weight 3 having the weight W 2 is made smaller than this value. there is a problem that must determine the weight W 2 of the weight 3.
発明が解決しようとする課題 そこで、本発明は、このような動吸振器の副振動系に
おいて、その支持ばねのたわみの値を、動吸振器の性能
を損なうこと無く、任意に選択することができる副振動
系の新規な支持方法を得ることを、その目的とするもの
である。Therefore, in the present invention, in such a sub-vibration system of a dynamic vibration absorber, the value of the deflection of the support spring can be arbitrarily selected without impairing the performance of the dynamic vibration absorber. It is an object of the present invention to obtain a new method of supporting a sub-vibration system that can be used.
課題を解決するための手段 本発明においては、この目的を達成し、従来のものに
おける問題点を解決するために、防振すべき機械が、支
持体の上に第１支持ばねにより弾性的に防振支持されて
おり、この機械及び前記第１支持ばねにより動吸振器を
形成しており、この動吸振器の振動を制限するために、
前記機械に第２支持ばねを介して重錘を取り付け、この
第２支持ばねと前記重錘とにより副振動系が形成されて
いる動吸振器の副振動系において、前記副振動系の前記
重錘を前記第２支持ばねのほかに、追加の第３支持ばね
によって前記機械の内側に支持し、一定のばね定数で用
いるこれらの第２、第３支持ばねを、いずれも、各々複
数とすると共に、あらかじめたわませた状態において前
記機械と前記重錘との間でかつ前記重錘の両側に配置し
て吸振を行い、前記第２、第３支持ばねは前記機械及び
重錘に直接接続して用いることを特徴とする動吸振器の
副振動系の支持方法である。Means for Solving the Problems In the present invention, in order to achieve this object and solve the problems in the prior art, a machine to be damped is elastically mounted on a support by a first support spring. A vibration damper is supported by this machine and the first support spring, and in order to limit the vibration of the dynamic damper,
A weight is attached to the machine via a second support spring, and in the sub-vibration system of the dynamic vibration absorber in which a sub-vibration system is formed by the second support spring and the weight, the weight of the sub-vibration system is The weight is supported inside the machine by an additional third support spring in addition to the second support spring, and each of the second and third support springs used at a constant spring constant is plural. At the same time, in a state where the weight is bent beforehand, the vibration absorber is arranged between the machine and the weight and on both sides of the weight to perform vibration absorption, and the second and third support springs are directly connected to the machine and the weight. This is a method for supporting a sub-vibration system of a dynamic vibration absorber, wherein the method is used.
実施例 以下、本発明をその実施の要領を示す添付図面の第１
図に基づいて、詳細に説明をする。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described with reference to the first embodiment of the accompanying drawings, which show the gist of the embodiment.
This will be described in detail with reference to the drawings.
本発明の要旨は、第１図に略図により示す系統図から
分かるように、支持体Ｇの上に、防振すべき機械など
（重量すなわち機械W1）10を、ばね定数K1を有する第１
支持ばね11により弾性支持し、この機械など10及び第１
支持ばね11から形成されている防振器に、その防振性能
を向上させるために、重量W2を有している重錘12（すな
わち重錘W2）と、それぞれ、ばね定数Ｋ′１及びＫ′２
を有している第２、第３支持ばね13及び14とから形成さ
れた副振動系を、その第２、第３支持ばね13及び14を介
して機械など10と、重錘12とを連結することにより配置
するが、この場合、各第２、第３支持ばね13及び14を、
それぞれ、あらかじめ、たわまされた状態で、かつ、固
定した一定のばね定数にあるようにするものである。The gist of the present invention is that, as can be seen from the schematic diagram shown in FIG. 1, a machine or the like (weight, ie, machine W 1 ) 10 to be subjected to vibration isolation is provided on a support body G with a spring constant K 1 . 1
Elastically supported by a support spring 11, this machine 10 and the first
The vibration isolators formed from the support spring 11, in order to improve the vibration damping ability, the weight 12 has a weight W 2 (i.e. weight W 2), respectively, the spring constant K '1 And K ′ 2
The sub-vibration system formed by the second and third support springs 13 and 14 is connected to the machine 10 and the weight 12 via the second and third support springs 13 and 14. In this case, the second and third support springs 13 and 14 are
Each of them is to be in a state of being deflected in advance and to have a fixed constant spring constant.
このように、本発明においては、第２図に示された従
来の動吸振器の副振動系に比べ、その重錘３及び支持ば
ね４に、それぞれ、相当する重錘12及び第２支持ばね13
のほかに、他の第３支持ばね14を追加し、これらの第
２、第３支持ばね13及び14を、それぞれ、あらかじめ、
たわみ状態にあるようにしたことが、特徴となっている
ものである。また、重錘W2は機械W1の内側に位置し、第
２、第３支持ばね13,14は機械W1及び重錘W2に直接接続
され、かつ、重錘W2の両側に設けられている。As described above, in the present invention, the weight 3 and the support spring 4 correspond to the weight 12 and the second support spring, respectively, as compared with the auxiliary vibration system of the conventional dynamic vibration absorber shown in FIG. 13
In addition to the above, another third support spring 14 is added, and these second and third support springs 13 and 14 are respectively
The feature is that it is in a deflected state. The weight W 2 is located inside the machine W 1 , and the second and third support springs 13 and 14 are directly connected to the machine W 1 and the weight W 2 , and are provided on both sides of the weight W 2. Have been.
そこで、本発明による動吸振器のこの副振動系におい
て、第２、第３支持ばね13及び14を、相互に、圧縮状
態、又は、引張り状態において中立状態にあるものと考
えると、これらの合成ばね定数K2は K2＝Ｋ′１＋Ｋ′２ となる。Therefore, in this sub-vibration system of the dynamic vibration absorber according to the present invention, if the second and third support springs 13 and 14 are considered to be in a neutral state in a compressed state or a tensioned state, it is possible to combine them. the spring constant K 2 is the K 2 = K '1 + K ' 2.
従って、中立時の各第２、第３支持ばね13及び14のた
わみを、それぞれ、δ′１及びδ′２とすると、 Ｋ′１・δ′１−Ｋ′２・δ′２−W2＝０ の関係が生ずる。Therefore, assuming that the deflections of the second and third support springs 13 and 14 at the time of neutral are δ ′ 1 and δ ′ 2 , respectively, K ′ 1 · δ ′ 1 −K ′ 2 · δ ′ 2 −W 2 = 0.
このように、本発明によると、従来の動吸振器の副振
動系における支持ばね４に相当する、ばね定数Ｋ′１を
有する第２支持ばね13の他に、追加して、ばね定数Ｋ′
２を有して第３支持ばね14を、機械など10と、重錘12と
の間に配置することにより、各第２、第３支持ばね13及
び14のたわみδ′１及びδ′２を、任意に選択すること
が可能となることとなる。Thus, according to the present invention, corresponding to the support spring 4 in the secondary vibration system of the conventional dynamic vibration absorber, the spring constant K 'in addition to the second supporting spring 13 having one, in addition, the spring constant K'
By disposing the third support spring 14 having the second between the machine 10 and the weight 12, the deflection δ ′ 1 and δ ′ 2 of each of the second and third support springs 13 and 14 can be reduced. , Can be arbitrarily selected.
今、ここで、本発明による支持方法の数値例を挙げる
と、次のようになる。Now, numerical examples of the supporting method according to the present invention are as follows.
数 値 例 防振されるべき機械など10が、産業機械であるものと
し、その回転数が480/min（ｆ＝8.0Hz）であるものとし
た場合、従来の支持方法による場合は、上式により計算
して δ＝3.3mm となることが分かるが、これから見て、従来の副振動系
においては、その動変位が、これ以下となるように、重
錘３の重量W2を大きくしなければならない（生産機械な
どの発生加振力は、一定として）。Numerical value Example If the machine 10 to be anti-vibration is an industrial machine and its rotation speed is 480 / min (f = 8.0 Hz), the above formula From the above, it can be seen that δ = 3.3 mm. From this, it can be seen that in the conventional auxiliary vibration system, the weight W 2 of the weight 3 must be increased so that the dynamic displacement is less than this. (The generated excitation force of production machines, etc. must be constant).
これに対し、本発明によると、追加の第３支持ばね14
を取り付けることにより、重錘12の重量W2を小さくし、
動変位が3.3mm以上となっても、第２、第３支持ばね13
及び14により、たわみδ′１及びδ′２を自由に取るこ
とが可能となり、従って、動吸振器の性能を低下させる
こと無く、経済的な動吸振器の実現が可能となる。On the other hand, according to the present invention, an additional third support spring 14 is provided.
By attaching, the weight W 2 of the weight 12 is reduced,
Even if the dynamic displacement is 3.3 mm or more, the second and third support springs 13
And 14, the flexures δ ′ 1 and δ ′ 2 can be taken freely, and therefore, an economical dynamic vibration absorber can be realized without deteriorating the performance of the dynamic vibration absorber.
発明の効果 本発明は、上記のような構成及び作用を有しているの
で、動吸振器の副振動系を改善することにより、従来公
知のものにおける問題点を解決し、その所期の性能を低
下すること無しに重錘12の重量W2を小さくすることが可
能となり、経済的な動吸振器を提供することができるも
のである。Advantageous Effects of Invention Since the present invention has the above-described configuration and operation, by improving the sub-vibration system of the dynamic vibration absorber, it is possible to solve the problems of the conventionally known dynamic vibration absorber, and to achieve the expected performance. it is possible to reduce the weight W 2 of Jutsumu 12 without lowering the one in which it is possible to provide an economical dynamic vibration reducer.
第１図は、本発明による動吸振器の副振動系を示す略
図、第２図は、従来公知の動吸振器の副振動系の典型的
な例を示す略図である。 10……産業機械など、11……支持ばね、12……重錘、13
……重錘の第２支持ばね、14……重錘の追加の第３支持
ばね。FIG. 1 is a schematic diagram showing a sub-vibration system of a dynamic vibration absorber according to the present invention, and FIG. 2 is a schematic diagram showing a typical example of a sub-vibration system of a conventionally known dynamic vibration absorber. 10 …… Industrial machinery, etc… 11… Support spring, 12… Plumb weight, 13
... Second support spring of weight, 14... Additional third support spring of weight.
Claims (1)
上に第１支持ばね（11）により弾性的に防振支持されて
おり、この機械（W1）及び前記第１支持ばね（11）によ
り動吸振器を形成しており、この動吸振器の振動を制限
するために、前記機械（W1）に第２支持ばね（13）を介
して重錘（W2）を取り付け、この第２支持ばね（13）と
前記重錘（W2）とにより副振動系が形成されている動吸
振器の副振動系において、前記副振動系の前記重錘
（W2）を前記第２支持ばね（13）のほかに、追加の第３
支持ばね（14）によって前記機械（W1）の内側に支持
し、一定のばね定数で用いるこれらの第２、第３支持ば
ね（13,14）を、いずれも、各々複数とすると共に、あ
らかじめたわませた状態において前記機械（W1）と前記
重錘（W2）との間でかつ前記重錘（W2）の両側に配置し
て吸振を行い、前記第２、第３支持ばね（13,14）は前
記機械（W1）及び重錘（W2）に直接接続して用いること
を特徴とする動吸振器の副振動系の支持方法。A machine (W 1 ) to be damped is elastically supported by a first support spring (11) on a support (G), and the machine (W 1 ) and said machine (W 1 ) The first support spring (11) forms a dynamic vibration absorber. In order to limit the vibration of the dynamic vibration absorber, the weight (W) is connected to the machine (W 1 ) via the second support spring (13). 2 ), and in the auxiliary vibration system of the dynamic vibration absorber in which the auxiliary vibration system is formed by the second support spring (13) and the weight (W 2 ), the weight (W 2 ) In addition to the second support spring (13), an additional third
Each of the second and third support springs (13, 14) supported by the support spring (14) inside the machine (W 1 ) and used with a constant spring constant is provided with a plurality of each, and In the deflected state, the vibration is absorbed between the machine (W 1 ) and the weight (W 2 ) and on both sides of the weight (W 2 ), and the second and third support springs are moved. (13, 14) is a method for supporting a sub-vibration system of a dynamic vibration absorber, which is directly connected to the machine (W 1 ) and the weight (W 2 ).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63006778A JP2708444B2 (en) | 1988-01-18 | 1988-01-18 | Supporting method of auxiliary vibration system of dynamic vibration absorber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63006778A JP2708444B2 (en) | 1988-01-18 | 1988-01-18 | Supporting method of auxiliary vibration system of dynamic vibration absorber |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01182647A JPH01182647A (en) | 1989-07-20 |
| JP2708444B2 true JP2708444B2 (en) | 1998-02-04 |
Family
ID=11647635
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63006778A Expired - Lifetime JP2708444B2 (en) | 1988-01-18 | 1988-01-18 | Supporting method of auxiliary vibration system of dynamic vibration absorber |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2708444B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4922775B2 (en) | 2007-01-29 | 2012-04-25 | 株式会社フジキン | Fluid controller |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5424236U (en) * | 1977-07-20 | 1979-02-17 |
-
1988
- 1988-01-18 JP JP63006778A patent/JP2708444B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01182647A (en) | 1989-07-20 |
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