JP2750457B2 - Metal bellows tube - Google Patents
Metal bellows tubeInfo
- Publication number
- JP2750457B2 JP2750457B2 JP1251240A JP25124089A JP2750457B2 JP 2750457 B2 JP2750457 B2 JP 2750457B2 JP 1251240 A JP1251240 A JP 1251240A JP 25124089 A JP25124089 A JP 25124089A JP 2750457 B2 JP2750457 B2 JP 2750457B2
- Authority
- JP
- Japan
- Prior art keywords
- bellows tube
- bellows
- fitted
- coil spring
- tube
- 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
Landscapes
- Rigid Pipes And Flexible Pipes (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は、金属製蛇腹管に関するものである。Description: TECHNICAL FIELD The present invention relates to a metal bellows tube.
（従来の技術） 金属製蛇腹管は、過酷な温度、圧力、腐食環境下で使
用されると共に、可撓性に富んでいて、外部からの衝撃
を吸収し、同時に振動吸収の機能をも有するために、自
動車の排気装置の配管、船舶のエンジン廻りの配管、空
調関係のポンプ、コンプレッサの配管などに広く使用さ
れている。(Conventional technology) A metal bellows tube is used under severe temperature, pressure, and corrosive environment, and is highly flexible, absorbs external shocks, and has a function of absorbing vibration at the same time. Therefore, it is widely used for piping of exhaust systems of automobiles, piping around engines of ships, pumps for air conditioning, and piping of compressors.
第３図は、従来の蛇腹管の断面部分を含む正面図であ
り、蛇腹管の周面には山部２と谷部３を有する蛇腹が等
間隔に形成されている。FIG. 3 is a front view including a cross section of a conventional bellows tube, and bellows having peaks 2 and valleys 3 are formed at equal intervals on the peripheral surface of the bellows tube.
（発明が解決しようとする課題） 前述の従来の蛇腹管に曲げ変位が加えられると、第３
図の蛇腹管１の固定部４の近傍の蛇腹端末部５にかかる
曲げモーメントが大きくなるので、この部分に応力が集
中して発生し、蛇腹端末部５で折損事故が発生しがちで
あった。(Problems to be Solved by the Invention) When bending displacement is applied to the above-mentioned conventional bellows tube,
Since the bending moment applied to the bellows end portion 5 near the fixing portion 4 of the bellows tube 1 shown in the figure increases, stress concentrates on this portion, and a breakage accident tends to occur at the bellows end portion 5. .
また、従来の蛇腹管では、全体に壁厚が一定で、且つ
等間隔に蛇腹が形成されているために、蛇腹管が全長に
わたって同一の共振周波数を有し、この共振周波数にお
いて蛇腹管全体が共振して、破損事故を発生することも
あった。Moreover, in the conventional bellows tube, since the bellows are formed at equal intervals and the bellows are formed at equal intervals, the bellows tube has the same resonance frequency over the entire length. It sometimes resonated and caused a breakage accident.
本発明は、上述したような金属性蛇腹管の現状に鑑み
てなされたものであり、その目的は曲げ変位が与えられ
ても、特に固定部近傍などの応力集中箇所の剛性を上
げ、曲げモーメントによる折損事故を防止し、また金属
製蛇腹管全体の同一の周波数での共振を避けて耐振強度
を向上し、さらに音の減衰効果を高めた金属製蛇腹管を
提供するにある。The present invention has been made in view of the current state of the above-described metallic bellows tube, and has an object to increase the rigidity of a stress-concentrated portion such as in the vicinity of a fixed portion even when a bending displacement is given, and to increase a bending moment. Another object of the present invention is to provide a metal bellows tube which prevents breakage accidents caused by the bellows tube, avoids resonance of the entire metal bellows tube at the same frequency, improves the vibration resistance, and further enhances the sound attenuation effect.
（課題を解決するための手段） 前記した目的を達成するために本発明の第１の実施態
様は、蛇腹部分の谷部に、コイルスプリングが嵌合され
ている金属製蛇腹管を特徴とするものであり、またに本
発明の第２の実施態様は、前記蛇腹部分の複数の谷部
に、ばね定数の異なるコイルスプリングが嵌合されてい
る金属製蛇腹管を特徴とするものである。(Means for Solving the Problems) In order to achieve the above object, a first embodiment of the present invention is characterized by a metal bellows tube in which a coil spring is fitted in a valley of a bellows portion. A second embodiment of the present invention is characterized by a metal bellows tube in which coil springs having different spring constants are fitted in a plurality of valleys of the bellows portion.
（作 用） 本発明の第１の実施態様では、金属製蛇腹管の周面の
蛇腹部分の谷部に、リング状のコイルスプリングが嵌合
されているので、このコイルスプリングのばね定数に対
応して該コイルスプリングが嵌合された蛇腹部分の剛性
が増大する。(Operation) In the first embodiment of the present invention, since a ring-shaped coil spring is fitted in a valley portion of the bellows portion of the peripheral surface of the metal bellows tube, the spring constant of the coil spring is adjusted. As a result, the rigidity of the bellows portion where the coil spring is fitted increases.
従って、曲げモーメントにより応力が集中する例えば
固定部近傍の蛇腹部分の谷部にコイルスプリングを嵌合
して、応力の集中による折損事故を防止でき、且つ軸方
向に剛性の変化を持たせることにより金属製蛇腹管全体
が、同一の周波数で共振することが避けられ、さらに音
の減衰効果を高めることが出来る。Therefore, for example, by fitting a coil spring in a valley of a bellows portion near the fixed portion where stress is concentrated by the bending moment, it is possible to prevent a breakage accident due to concentration of stress and to have a change in rigidity in the axial direction. The entire metal bellows tube is prevented from resonating at the same frequency, and the sound attenuation effect can be further enhanced.
さらに蛇腹部分の複数の谷部に、ばね定数の異なるコ
イルスプリングを嵌合することにより、金属製蛇腹管
（以下単に蛇腹管という）の剛性分布を定量的に制御す
ることも出来るものである。Further, by fitting coil springs having different spring constants into a plurality of valleys of the bellows portion, the rigidity distribution of a metal bellows tube (hereinafter simply referred to as a bellows tube) can be quantitatively controlled.
（実施例） 以下、本発明の実施例を第１図及び第２図を参照して
説明する。(Example) Hereinafter, an example of the present invention will be described with reference to FIG. 1 and FIG.
ここで、第１図は第１の実施例の縦断面図、第２図は
第２の実施例の縦断面図である。Here, FIG. 1 is a longitudinal sectional view of the first embodiment, and FIG. 2 is a longitudinal sectional view of the second embodiment.
第１の実施例では、第１図に示すように、蛇腹管１の
応力集中箇所、例えば両端部近傍の谷部３に、リング状
のコイルスプリング６が嵌合されている。従って、コイ
ルスプリング６のばね定数に対応して蛇腹管１の両端側
の蛇腹部分の剛性が増大するので、剛性が増大した蛇腹
部分の近傍を固定部により固定して使用すると、曲げモ
ーメントによる応力集中に対する疲労強度特性を向上さ
せて、折損事故を防止することが出来る。In the first embodiment, as shown in FIG. 1, a ring-shaped coil spring 6 is fitted to a stress concentration portion of the bellows tube 1, for example, a valley 3 near both ends. Therefore, the rigidity of the bellows portions at both ends of the bellows tube 1 increases in accordance with the spring constant of the coil spring 6, and when the vicinity of the bellows portion having increased rigidity is used by being fixed by the fixing portion, the stress due to the bending moment is increased. By improving the fatigue strength characteristics against concentration, breakage accidents can be prevented.
また、蛇腹管１の両端側の剛性を他部分と異っている
ために、蛇腹管１全体が同一の共振周波数に共振して破
損事故を生ずることが防止されると共に、蛇腹管１の音
の減衰効果を高めることも出来る。Further, since the rigidity of both ends of the bellows tube 1 is different from that of the other parts, it is possible to prevent the whole bellows tube 1 from resonating at the same resonance frequency and to cause a breakage accident, and to prevent the bellows tube 1 from being damaged. Can also enhance the damping effect.
第２の実施例では、第２図に示すように、蛇腹管１の
応力集中箇所、例えば蛇腹管の中央の谷部３にリング状
のコイルスプリング6aが嵌合され、このコイルフプリン
グ6aを挟んで隣接する谷部３に、それぞれリング状のコ
イルスプリング6bが嵌合されている。第２の実施例に使
用されるコイルスプリング6aとコイルスプリング6bと
は、互いに異なるばね定数を持っている。In the second embodiment, as shown in FIG. 2, a ring-shaped coil spring 6a is fitted to a stress concentration portion of the bellows tube 1, for example, a valley 3 at the center of the bellows tube. Ring-shaped coil springs 6b are fitted in the valleys 3 adjacent to each other with the sandwiched therebetween. The coil spring 6a and the coil spring 6b used in the second embodiment have different spring constants.
このようにばね定数の異なるコイルスプリング6a、6b
を谷部３に嵌合させることにより、第２の実施例では蛇
腹管１の中央部分の剛性を他部分に対して徐徐に高める
ことが出来る。The coil springs 6a, 6b having different spring constants
In the second embodiment, the rigidity of the central portion of the bellows tube 1 can be gradually increased with respect to the other portions.
第２の実施例では、蛇腹管１の中央部を固定部により
固定して使用すると、曲げモーメントによる応力集中に
対する疲労強度特性を向上させて、折損事故を防止する
ことが出来る。In the second embodiment, when the central portion of the bellows tube 1 is used by being fixed by the fixing portion, the fatigue strength characteristics against the stress concentration due to the bending moment can be improved, and the breakage accident can be prevented.
また、異なるばね定数のコイルスプリング6a、6bが嵌
合されているため、蛇腹管１の軸方向の共振周波数が部
分的に変化し、蛇腹管１全体が同一の共振周波数に共振
して破損事故を生ずることが防止され、蛇腹管１の音の
減衰効果を高めることも出来る。In addition, since the coil springs 6a and 6b having different spring constants are fitted, the axial resonance frequency of the bellows tube 1 is partially changed, and the entire bellows tube 1 resonates at the same resonance frequency and is damaged. Can be prevented, and the sound attenuating effect of the bellows tube 1 can be enhanced.
特に第２の実施例では、複数の谷部を選択しそれぞれ
にばね定数の異なるコイルスプリング6a、6bを嵌合する
ことにより、蛇腹管１の軸方向における剛性分布を定量
的に制御して疲労強度、耐振強度及び音の減衰効果をき
め細かに増加調整することが出来る。In particular, in the second embodiment, by selecting a plurality of valleys and fitting coil springs 6a and 6b having different spring constants to each of them, the rigidity distribution in the axial direction of the bellows tube 1 is quantitatively controlled to reduce fatigue. The strength, vibration resistance and sound damping effect can be finely increased and adjusted.
なお、実施例では、単層の蛇腹管にコイルスプリング
を嵌合した場合について説明したが、本発明は実施例に
限定されるものでなく、多層蛇腹管にコイルスプリング
を嵌合した構成とすることも出来る。In the embodiment, the case where the coil spring is fitted to the single-layer bellows tube is described, but the present invention is not limited to the embodiment, and the coil spring is fitted to the multilayer bellows tube. You can do it.
（発明の効果） 以上述べた通り本発明によれば、蛇腹管の谷部にリン
グ状のコイルスプリングを嵌合させて蛇腹管の応力集中
箇所の剛性を向上させて曲げモーメントによる折損事故
を防止し、蛇腹管全体の同一周波数での共振を避けて耐
振強度を向上させ、さらに音の減衰効果を高めることが
出来る。(Effects of the Invention) As described above, according to the present invention, a ring-shaped coil spring is fitted into a valley of a bellows tube to improve the rigidity of a stress concentration portion of the bellows tube, thereby preventing a breakage accident due to a bending moment. In addition, it is possible to improve the vibration proof strength by avoiding resonance of the entire bellows tube at the same frequency, and to further enhance the sound attenuation effect.
またそれぞればね定数の異なるコイルスプリングを使
用すれば、蛇腹管の軸方向の剛性分布を定量的に制御し
て、疲労強度、耐振強度、音の減衰効果をきめ細かく増
加調整することも出来る。If coil springs having different spring constants are used, the axial rigidity distribution of the bellows tube can be quantitatively controlled, and the fatigue strength, vibration resistance, and sound damping effect can be finely increased and adjusted.
第１図は、本発明の第１の実施例の縦断面図、第２図
は、本発明の第２の実施例の縦断面図、第３図は、従来
の蛇腹管の断面部分を含む正面図である。 １……蛇腹管、２……山部、３……谷部、４……固定
部、６、6a、6b……コイルスプリング。FIG. 1 is a longitudinal sectional view of a first embodiment of the present invention, FIG. 2 is a longitudinal sectional view of a second embodiment of the present invention, and FIG. 3 includes a sectional portion of a conventional bellows tube. It is a front view. 1 ... bellows tube, 2 ... crest, 3 ... trough, 4 ... fixed part, 6, 6a, 6b ... coil spring.
Claims (2)
合されていることを特徴とする金属製蛇腹管。1. A metal bellows tube, wherein a coil spring is fitted in a valley of the bellows portion.
るコイルスプリングが嵌合されていることを特徴とする
金属製蛇腹管。2. A metal bellows tube wherein coil springs having different spring constants are fitted in a plurality of valleys of the bellows portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1251240A JP2750457B2 (en) | 1989-09-27 | 1989-09-27 | Metal bellows tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1251240A JP2750457B2 (en) | 1989-09-27 | 1989-09-27 | Metal bellows tube |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03113188A JPH03113188A (en) | 1991-05-14 |
| JP2750457B2 true JP2750457B2 (en) | 1998-05-13 |
Family
ID=17219812
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1251240A Expired - Fee Related JP2750457B2 (en) | 1989-09-27 | 1989-09-27 | Metal bellows tube |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2750457B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102088524B1 (en) * | 2019-10-11 | 2020-03-12 | (주)동우에프지엠 | Uni-flex tube |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6689503B2 (en) * | 2001-02-15 | 2004-02-10 | Asia Pacific Fuel Cell Technologies, Ltd. | Fuel cell with uniform compression device |
| TW488111B (en) | 2001-04-16 | 2002-05-21 | Asia Pacific Fuel Cell Tech | Anode stream recirculation system for a fuel cell |
| TW533620B (en) | 2001-07-24 | 2003-05-21 | Asia Pacific Fuel Cell Tech | Metal hydride hydrogen storage canister design and its manufacture |
| TW511316B (en) | 2001-08-15 | 2002-11-21 | Asia Pacific Fuel Cell Tech | Diaphragm pump and anode stream recirculation system using such pump for a fuel cell |
| DE102016212686A1 (en) * | 2016-07-12 | 2018-01-18 | Thyssenkrupp Ag | Bellows assembly and bellows for vehicles |
-
1989
- 1989-09-27 JP JP1251240A patent/JP2750457B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102088524B1 (en) * | 2019-10-11 | 2020-03-12 | (주)동우에프지엠 | Uni-flex tube |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03113188A (en) | 1991-05-14 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| LAPS | Cancellation because of no payment of annual fees |