CN202117195U - Vibration absorber with multiple natural frequencies - Google Patents
Vibration absorber with multiple natural frequencies Download PDFInfo
- Publication number
- CN202117195U CN202117195U CN2011201976893U CN201120197689U CN202117195U CN 202117195 U CN202117195 U CN 202117195U CN 2011201976893 U CN2011201976893 U CN 2011201976893U CN 201120197689 U CN201120197689 U CN 201120197689U CN 202117195 U CN202117195 U CN 202117195U
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- flat spring
- mass
- vibration
- bump leveller
- leaf spring
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Abstract
The utility model discloses a vibration absorber with multiple natural frequencies. Different leaf spring mass systems respectively act corresponding to changes of natural frequency of a structure, so that excellent vibration and noise reduction effect is realized within a larger frequency range. The vibration absorber comprises a base and a plurality of leaf springs, one end of each leaf spring is fixedly connected with the base, a mass block is mounted at the other end of each leaf spring, lengths of portions, which extend out of the base, of the leaf springs are unequal, and weights of the mass blocks mounted on the leaf springs are different. An adjusting screw is mounted on each mass block, an adjusting nut is connected onto each adjusting screw in a threaded manner, a damping material which contacts with the corresponding leaf spring is mounted on each adjusting nut, and the adjusting nuts drive the damping materials to move on the leaf springs. The vibration absorber corresponds to the changes of the natural frequency of the structure, different leaf spring mass systems respectively act, fine vibration and noise reduction effect can be realized within the larger frequency range, and requirements of vibration reduction under the condition of larger changes of frequency of exciting force can be met.
Description
Technical field
The utility model relates to a kind of bump leveller with many intrinsic frequencies.
Background technology
Along with the development of urban construction and communication, a large amount of viaduct has appearred in the city, and this bridge adopts steel or steel concrete mostly, and is internally-damped less because of it, and the vibration and the noise that produce also become a serious social concern thereupon.For example, vehicle will produce noise during through bridge, and the size of noise is directly proportional with the speed that vehicle passes through.Sometimes, be the restriction noise level, will restricted speed.
When vehicle designs,, all adopt vibration absorber or measure such as abatvoix is installed in car for reducing the influence of motor and road vibration to quiet effect in the car.But in order to practice thrift fuel oil and material, often alleviate the weight of car body now, the noise that vehicle is produced is more serious.
The vibration that truck causes during through bridge is delivered to the noise that the residential block takes place through ground progressively becomes social concern.For alleviating noise bump leveller is installed on bridge.Present bump leveller all is based on the parameter of the intrinsic frequency design bump leveller of structure; The vibration damping object of vibration frequency has the better damping effect for having fixedly; But when the intrinsic frequency of structure changes a little; When for example passing through the truck weight change of bridge, the intrinsic frequency of bridge will change, and vibration-absorbing denoising effect at this moment reduces.In addition, the residing environment temperature Yin Dongxia of bridge and bigger difference is arranged round the clock, all influential to effectiveness in vibration suppression.Cause the effective absorbing bandwidth of bump leveller narrower, can not satisfy the vibration damping demand under the big situation of exciting force change of frequency.
The utility model content
The utility model is in order to overcome weak point of the prior art; A kind of bump leveller with many intrinsic frequencies is provided; Intrinsic frequency corresponding to structure changes, and different flat spring quality systems work respectively, so that in bigger frequency range, play the excellent vibration damping noise reduction.
The utility model is realized through following technical proposals:
A kind of bump leveller with many intrinsic frequencies; It is characterized in that; Comprise base, a plurality of flat spring, each flat spring one end is fixedly connected with said base, and the other end of each flat spring is equipped with mass; Being uneven in length of each flat spring protuberate basic unit, the varying in weight of the mass of installing on each flat spring.
Each mass upper edge flat spring length direction is equipped with adjusting screw(rod), and the adjusting nut that has been threaded on each adjusting screw(rod) is equipped with on each adjusting nut and the contacted damping material of flat spring, and adjusting nut drives damping material and on flat spring, moves.
Each mass is made up of improve quality piece and following mass, and an end of each flat spring installation quality piece is provided with slotted hole, and bolt passes said slotted hole and connects also will improve quality piece and following mass and flat spring of improve quality piece and following mass and fix.
Said damping material is an elastomeric material, and the damped coefficient of each damping material is different.
The stiffness factor of each flat spring is different.
The utlity model has following technique effect:
1, the flat spring of a plurality of different lengths and stiffness factor is installed on the bump leveller base of the utility model; Intrinsic frequency corresponding to structure changes; Different flat spring quality systems work respectively; Can in bigger frequency range, play the excellent vibration damping noise reduction, can satisfy the vibration damping demand under the big situation of exciting force change of frequency.
2, the damping material on the utility model bump leveller can move at the flat spring length direction, has suppressed the influence of frequency varied somewhat, has further improved effect of vibration and noise reduction.
3, the bump leveller of the utility model is easy to adjust, can real time altering bump leveller parameter, and in light weight, cheap, less energy consumption, good stability.
Description of drawings
Fig. 1 is the sectional view that the utlity model has the bump leveller of many intrinsic frequencies;
Fig. 2 is the distribution schematic diagram of four flat springs;
Fig. 3 is shock attenuation result figure.
The specific embodiment
Below in conjunction with accompanying drawing and specific embodiment the utility model is elaborated.
The sketch map of bump leveller that the utlity model has many intrinsic frequencies is as shown in Figure 1, comprises base 1, a plurality of flat spring 3, and each flat spring 3 one end is fixedly connected with base 1, and the other end of each flat spring is equipped with mass 5.Being uneven in length of each flat spring protuberate basic unit, the varying in weight of the mass of installing on each flat spring.The stiffness factor of each flat spring is different.
In order to carry out fine adjustment; Each mass 5 upper edge flat spring length direction is equipped with adjusting screw(rod) 6; The adjusting nut 7 that has been threaded on each adjusting screw(rod) 6 is equipped with on each adjusting nut 7 and the contacted damping material 8 of flat spring, and adjusting nut drives damping material and on flat spring, moves.Wherein, damping material 10 can adopt elastomeric material, and the damped coefficient of each damping material is different.
For the ease of regulating; Each mass is made up of with following mass the piece of improving quality; One end of each flat spring installation quality piece is provided with slotted hole, and bolt 4 passes said slotted hole and connects the piece of improving quality and fix with following mass and will improve quality piece and following mass and flat spring.When needing the position of quality of regulation piece, bolt to be unscrewed, adjusted piece, following regulating block and bolt move to suitable position along slotted hole together, bolt are tightened to get final product again.
In use, the base 1 with bump leveller is fixed on by on the vibration amplitude maximum point of vibration damping thing through set bolt 2.According to by the intrinsic frequency scope of vibration damping thing, regulate the position of mass on flat spring of bump leveller, the best absorbing frequency of bump leveller can be covered by the intrinsic frequency scope of vibration damping thing to well.The damping that the adjusting nut of adjustment bump leveller produces damping material suitably changes, and suppresses the Oscillation Amplitude of bump leveller mass, when by the intrinsic frequency varied somewhat of vibration damping thing, also can play shock attenuation result preferably.
With the bump leveller with four flat springs is that embodiment makes an experiment.
Fig. 2 is the distribution schematic diagram of four flat springs; The length of four flat spring 3-1,3-2,3-3 and 3-4 is respectively 300mm, 320mm, 350mm, 380mm; The quality of mass is respectively 30kg, 35kg, 40kg, 45kg, and the sectional dimension of flat spring is 30 * 5mm.When different trucks enterings, with acceleration transducer test that bump leveller is not installed is as shown in Figure 3 with the acceleration responsive amplitude of the beam mid point that bump leveller is installed.Do not adding under the situation of bump leveller, three higher formants appear in response curve, and formant all is suppressed behind the installation bump leveller; From effectiveness in vibration suppression to recently seeing; The effectiveness in vibration suppression that bump leveller is acutely located in vibration of beam is good more, and at the intrinsic frequency place of beam, effectiveness in vibration suppression can reach 4 times.
Claims (5)
1. bump leveller with many intrinsic frequencies; It is characterized in that; Comprise base, a plurality of flat spring, each flat spring one end is fixedly connected with said base, and the other end of each flat spring is equipped with mass; Being uneven in length of each flat spring protuberate basic unit, the varying in weight of the mass of installing on each flat spring.
2. the bump leveller with many intrinsic frequencies according to claim 1; It is characterized in that; Each mass upper edge flat spring length direction is equipped with adjusting screw(rod); The adjusting nut that has been threaded on each adjusting screw(rod) is equipped with on each adjusting nut and the contacted damping material of flat spring, and adjusting nut drives damping material and on flat spring, moves.
3. the bump leveller with many intrinsic frequencies according to claim 1 and 2; It is characterized in that; Each mass is made up of with following mass the piece of improving quality; One end of each flat spring installation quality piece is provided with slotted hole, and bolt passes said slotted hole and connects the piece of improving quality and fix with following mass and will improve quality piece and following mass and flat spring.
4. the bump leveller with many intrinsic frequencies according to claim 3 is characterized in that, said damping material is an elastomeric material, and the damped coefficient of each damping material is different.
5. the bump leveller with many intrinsic frequencies according to claim 4 is characterized in that, the stiffness factor of each flat spring is different.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201976893U CN202117195U (en) | 2011-06-13 | 2011-06-13 | Vibration absorber with multiple natural frequencies |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201976893U CN202117195U (en) | 2011-06-13 | 2011-06-13 | Vibration absorber with multiple natural frequencies |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202117195U true CN202117195U (en) | 2012-01-18 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201976893U Expired - Fee Related CN202117195U (en) | 2011-06-13 | 2011-06-13 | Vibration absorber with multiple natural frequencies |
Country Status (1)
| Country | Link |
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| CN (1) | CN202117195U (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105221623A (en) * | 2014-06-13 | 2016-01-06 | 陕西飞机工业（集团）有限公司 | A kind of propeller driven airplane noise reduction multiple resonance points dynamic vibration absorber |
| CN105526293A (en) * | 2016-01-25 | 2016-04-27 | 广东工业大学 | Frequency-adjustable composite shock absorber based on mobile support |
| CN106151341A (en) * | 2015-04-02 | 2016-11-23 | 陕西飞机工业（集团）有限公司 | A kind of multiple degrees of freedom dynamic vibration absorber |
| CN109268418A (en) * | 2018-10-26 | 2019-01-25 | 西南交通大学 | A kind of weather-proof durability all-metal multiple spot frequency-selecting vibration suppression structure |
| CN111365399A (en) * | 2020-04-15 | 2020-07-03 | 国网(西安)环保技术中心有限公司 | Adjustable portable dynamic vibration absorber and operation method thereof |
| CN111550514A (en) * | 2020-04-07 | 2020-08-18 | 株洲时代新材料科技股份有限公司 | Multi-frequency dynamic vibration absorption method and multi-frequency dynamic vibration absorber |
| CN112389642A (en) * | 2020-10-30 | 2021-02-23 | 哈尔滨飞机工业集团有限责任公司 | Dynamic vibration absorber structure for helicopter vibration reduction |
| CN113431866A (en) * | 2021-06-01 | 2021-09-24 | 北京工业大学 | Bidirectional vibration suppression shock absorber and design method thereof |
| CN113464603A (en) * | 2021-06-15 | 2021-10-01 | 上海工程技术大学 | Tuning dynamic damper with adjustable it is multidirectional |
| CN113883222A (en) * | 2021-09-16 | 2022-01-04 | 苏州东菱智能减振降噪技术有限公司 | Multi-line spectrum frequency vibration reduction device with adjustable parameters |
| CN114251413A (en) * | 2020-09-25 | 2022-03-29 | 上海微电子装备（集团）股份有限公司 | Vibration damping device |
| CN114623198A (en) * | 2022-03-21 | 2022-06-14 | 苏州东菱智能减振降噪技术有限公司 | Vibration-damping and impact-resisting device |
-
2011
- 2011-06-13 CN CN2011201976893U patent/CN202117195U/en not_active Expired - Fee Related
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105221623A (en) * | 2014-06-13 | 2016-01-06 | 陕西飞机工业（集团）有限公司 | A kind of propeller driven airplane noise reduction multiple resonance points dynamic vibration absorber |
| CN106151341A (en) * | 2015-04-02 | 2016-11-23 | 陕西飞机工业（集团）有限公司 | A kind of multiple degrees of freedom dynamic vibration absorber |
| CN105526293A (en) * | 2016-01-25 | 2016-04-27 | 广东工业大学 | Frequency-adjustable composite shock absorber based on mobile support |
| CN105526293B (en) * | 2016-01-25 | 2018-09-25 | 广东工业大学 | The adjustable compound vibration-damper of frequency based on mobile support |
| CN109268418A (en) * | 2018-10-26 | 2019-01-25 | 西南交通大学 | A kind of weather-proof durability all-metal multiple spot frequency-selecting vibration suppression structure |
| CN109268418B (en) * | 2018-10-26 | 2024-05-10 | 西南交通大学 | Weather-proof durable all-metal multipoint frequency-selecting vibration-inhibiting structure |
| CN111550514A (en) * | 2020-04-07 | 2020-08-18 | 株洲时代新材料科技股份有限公司 | Multi-frequency dynamic vibration absorption method and multi-frequency dynamic vibration absorber |
| CN111550514B (en) * | 2020-04-07 | 2022-03-15 | 株洲时代新材料科技股份有限公司 | Multi-frequency dynamic vibration absorption method and multi-frequency dynamic vibration absorber |
| CN111365399A (en) * | 2020-04-15 | 2020-07-03 | 国网(西安)环保技术中心有限公司 | Adjustable portable dynamic vibration absorber and operation method thereof |
| CN114251413A (en) * | 2020-09-25 | 2022-03-29 | 上海微电子装备（集团）股份有限公司 | Vibration damping device |
| CN112389642A (en) * | 2020-10-30 | 2021-02-23 | 哈尔滨飞机工业集团有限责任公司 | Dynamic vibration absorber structure for helicopter vibration reduction |
| CN113431866A (en) * | 2021-06-01 | 2021-09-24 | 北京工业大学 | Bidirectional vibration suppression shock absorber and design method thereof |
| CN113464603A (en) * | 2021-06-15 | 2021-10-01 | 上海工程技术大学 | Tuning dynamic damper with adjustable it is multidirectional |
| CN113883222A (en) * | 2021-09-16 | 2022-01-04 | 苏州东菱智能减振降噪技术有限公司 | Multi-line spectrum frequency vibration reduction device with adjustable parameters |
| CN114623198A (en) * | 2022-03-21 | 2022-06-14 | 苏州东菱智能减振降噪技术有限公司 | Vibration-damping and impact-resisting device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120118 Termination date: 20130613 |