CN201973166U - Damping structure with small mass ratio - Google Patents
Damping structure with small mass ratio Download PDFInfo
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- CN201973166U CN201973166U CN2011200617732U CN201120061773U CN201973166U CN 201973166 U CN201973166 U CN 201973166U CN 2011200617732 U CN2011200617732 U CN 2011200617732U CN 201120061773 U CN201120061773 U CN 201120061773U CN 201973166 U CN201973166 U CN 201973166U
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- vibration
- absorber
- isolator
- vibration isolator
- bump leveller
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Abstract
The utility model provides a damping structure with small mass ratio. A parent vibration isolation comprises a mass and a vibration isolator which is connected with a foundation, further comprising a vibration absorber which is composed of a spring and a vibration absorber mass, wherein the vibration absorber is installed on the position closely to the vibration isolator. In a positive vibration isolation or a negative vibration isolation, a power vibration absorber is installed closely to the vibration isolator, which forms resonance with the vibration which passes through the vibration isolator at a fixed frequency, wherein the energy of the frequency is transferred to the power vibration absorber for further reducing the transferred vibration energy in the vibration isolator. The method which installs the power vibration absorber on the vibration transfer path effectively distributes the vibration energy passing through the vibration isolator. The damping structure with small mass ratio has the outstanding advantages that a good damping effect can be obtained since the ratio of the mass of the power vibration absorber to which of the parent is small, the weight, the volume and the cost of the damper absorber are reduced.
Description
Technical field
The utility model relates to a kind of mounting structure of dynamic vibration absorber.
Background technique
Vibration isolation in the vibration engineering is divided into passive insulation and active vibration isolation usually, is to prevent that foundation vibration from passing to equipment at passive insulation, and active vibration isolation is to prevent that vibration equipment from passing to ground.No matter in the passive insulation system or in the active vibration isolation system, vibration damper (being vibration isolator) and equipment (being parent) have constituted the mass-spring system of parent, only could be isolated greater than the vibration of 2 times of parent system frequency radical signs.In order to control the parent vibration, installing dynamic vibration absorber on parent additional is the way of using always.
Traditional dynamic vibration absorber mounting type vibrates as target with the control parent, so just need bigger mass ratio, generally will get mass ratio about 0.1～0.3 on the engineering, just the quality of dynamic vibration absorber will reach 10%～30% of the own quality of oscillating body.For the bigger parent of quality, reach certain control effect and will make the bump leveller quality too big, this installation to dynamic vibration absorber, maintenance are made troubles.
In the actual engineering, equipment has generally all been installed a plurality of vibration isolators and has been vibrated isolation, and the equipment that has has also adopted double-layer vibration isolating and even buoyant raft vibrating isolation system.In these complicated vibrating isolation systems, dynamic vibration absorber has still obtained being extensive use of, and the optimization of bump leveller mounting point research comes into one's own day by day.People such as Zhang Kun and Sheng Meiping has proposed the mounting point of bump leveller based on power circuit, all be mounted in the vibration displacement larger part or buoyant raft of elastic plate, mass ratio all＞0.1 (document [1] Zhang Kun, Sun Hongling, Chen Haibo, Zhang Peiqiang. the power circuit transmission characteristics that has the buoyant raft vibrating isolation system of dynamic vibration absorber is analyzed [J]. China Science ﹠ Technology University's journal, 2007,37:13-19; Document [2] Wang Minqing,, Sun Jincai. broadband power bump leveller power circuit characteristic research [J]. acoustic journal, 2002,27 (2): 121-123).
Can obtain following rule from above document, no matter to rigid model or elastomer model, bump leveller all should be installed in the vibration displacement biggest place.It can also be seen that simultaneously above document all is that bump leveller is installed on parent, intermediate mass or the raft body, these installation methods all need big mass ratio could realize the favorable damping effect.
Summary of the invention
The purpose of this utility model is that the little quality that provides a kind of little quality, high efficiency to reduce vibration transfer compares vibration damping structure.
The purpose of this utility model is achieved in that
Little quality of the present utility model than vibration damping structure is: quality and vibration isolator are formed the parent vibrating isolation system, and vibration isolator is connected with the basis, also comprises the bump leveller of being made up of spring and bump leveller quality, and described bump leveller is installed in the position near vibration isolator.
Little quality is than comprising in the vibration damping structure:
1, to be installed in the position near vibration isolator be that bump leveller is installed in the vibration damper front end to described bump leveller.
2, to be installed in the position near vibration isolator be that bump leveller is installed in the vibration damper rear end to described bump leveller.
3, comprise more than one vibration isolator in the same parent vibrating isolation system, bump leveller all is installed near the position of each vibration isolator.
4, comprise more than one vibration isolator in the same parent vibrating isolation system, only the position near the vibration isolator that is positioned at ragged edge or edge is equipped with bump leveller.
Described dynamic vibration absorber is installed near vibration damper is that bump leveller is installed near the vibration damper rear end, and vibration will be higher than the parent system through vibration damper
The energy of overtones band is subdued, and dynamic vibration absorber can further reduce the vibrational energy that vibration damper spreads out of.
Passive insulation and active vibration isolation all are to reach the vibration damping purpose by separating vibration, though traditional bump leveller mounting type has reached the vibration damping purpose by reducing the parent vibration, have consumed big dynamic vibration absorber quality.What the utility model proposes is installed in bump leveller on the vibration transfer approach, only needs very little quality just can reach the favorable damping effect.
In active vibration isolation system or passive insulation system, dynamic vibration absorber is installed near vibration isolator, dynamic vibration absorber resonates the vibrational energy that the energy of this frequency will be transferred to dynamic vibration absorber and then reduce to transmit in the vibration isolator with the vibration formation by the characteristic frequency in the vibration isolator.This dynamic vibration absorber is installed in method on the vibration transfer approach, the vibrational energy by vibration isolator has been carried out effective shunting.
Be installed in the parent upper type with traditional dynamic vibration absorber and compare, outstanding advantage of the present utility model is: the quality of dynamic vibration absorber and parent mass ratio are very little just can to obtain excellent vibration damping effect, has reduced weight, volume and the cost of bump leveller.
Description of drawings
Fig. 1 is a schematic diagram of the present utility model;
Fig. 2 is a case history scheme of installation of the present utility model;
Fig. 3 is that little quality of the present utility model is than vibration damping structure schematic representation.
Embodiment
Below in conjunction with accompanying drawing and illustrate embodiment of the present utility model:
In conjunction with Fig. 1 and Fig. 3.In the active vibration isolation system as shown in Figure 1, quality m1 and vibration isolator k1 have formed the parent vibration system, and the natural frequency of this system is
Vibration isolator k1 is connected with basic G, and the power of disturbing is F outward, and the frequency of disturbing power outward is ω, vibration isolator k1 effectively isolation frequency greater than
The outer power of disturbing of times ω 1.In order to absorb the vibration of characteristic frequency, traditional bump leveller is made up of spring k2 and quality m2, and traditional installation method is mounted on the parent quality m1, as the installation of spring k2 and quality m2.This mounting type can be controlled the vibration of parent m1 effectively, and then controls the vibration force that passes to basic G, if obtain good control effect, fitness for purpose m2/m1 in the engineering＞0.1 could be effectively.The utility model be bump leveller is installed in that vibration transfer approach k1 goes up rather than parent m1 on, installation as spring k3 and quality m3, though this installation method to the control poor effect of quality m1, can be delivered to the vibration force of basic G with very little mass ratio (m3/m1) control.
Fig. 2 is that certain generator set m1 weighs 27 tons, and 10 vibration isolator k1 are housed, if be in unit, to install 1 ton of dynamic vibration absorber m2 system (k2 and m2) additional by the conventional mounting method, and 10 vibration isolators vibration acceleration control effect＜1.5 up and down decibel then; 30 kilograms bump leveller m3 (k3 and m3 composition only respectively are installed at the vibration isolator of four end points according to the utility model, heavy altogether 120 kg), experiment test show 10 vibration isolators vibration acceleration control effect up and down all＞3.5 decibels, average effect reaches 4.2 decibels.
Claims (5)
1. a little quality is than vibration damping structure, and quality and vibration isolator are formed the parent vibrating isolation system, and vibration isolator is connected with the basis, it is characterized in that: also comprise the bump leveller of being made up of spring and bump leveller quality, described bump leveller is installed in the position near vibration isolator.
2. little quality according to claim 1 is characterized in that than vibration damping structure: the position that described bump leveller is installed near vibration isolator is that bump leveller is installed in the vibration damper front end.
3. little quality according to claim 1 is characterized in that than vibration damping structure: the position that described bump leveller is installed near vibration isolator is that bump leveller is installed in the vibration damper rear end.
According to claim 1,2 or 3 described little quality than vibration damping structure, it is characterized in that: comprise more than one vibration isolator in the same parent vibrating isolation system, bump leveller all is installed near the position of each vibration isolator.
According to claim 1,2 or 3 described little quality than vibration damping structure, it is characterized in that: comprise more than one vibration isolator in the same parent vibrating isolation system, only the position near the vibration isolator that is positioned at ragged edge or edge is equipped with bump leveller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200617732U CN201973166U (en) | 2011-03-10 | 2011-03-10 | Damping structure with small mass ratio |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200617732U CN201973166U (en) | 2011-03-10 | 2011-03-10 | Damping structure with small mass ratio |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201973166U true CN201973166U (en) | 2011-09-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200617732U Expired - Lifetime CN201973166U (en) | 2011-03-10 | 2011-03-10 | Damping structure with small mass ratio |
Country Status (1)
| Country | Link |
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| CN (1) | CN201973166U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102116358A (en) * | 2011-03-10 | 2011-07-06 | 哈尔滨工程大学 | Small-mass ratio damping structure and realization method |
| CN103171762A (en) * | 2011-12-21 | 2013-06-26 | 尤洛考普特德国有限公司 | Landing gear vibration absorber for a helicopter and method of operating said landing gear vibration absorber |
| CN103629297A (en) * | 2013-12-16 | 2014-03-12 | 洛阳双瑞橡塑科技有限公司 | Wide-frequency dynamic damping vibration attenuation device of equipment installation base |
-
2011
- 2011-03-10 CN CN2011200617732U patent/CN201973166U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102116358A (en) * | 2011-03-10 | 2011-07-06 | 哈尔滨工程大学 | Small-mass ratio damping structure and realization method |
| CN102116358B (en) * | 2011-03-10 | 2013-02-27 | 哈尔滨工程大学 | Small-mass ratio damping structure and realization method |
| CN103171762A (en) * | 2011-12-21 | 2013-06-26 | 尤洛考普特德国有限公司 | Landing gear vibration absorber for a helicopter and method of operating said landing gear vibration absorber |
| US8967536B2 (en) | 2011-12-21 | 2015-03-03 | Airbus Helicopters Deutschland GmbH | Landing gear vibration absorber and method of operating said landing gear vibration absorber |
| CN103171762B (en) * | 2011-12-21 | 2015-06-03 | 空客直升机德国有限公司 | Landing gear vibration absorber for a helicopter and method of operating said landing gear vibration absorber |
| CN103629297A (en) * | 2013-12-16 | 2014-03-12 | 洛阳双瑞橡塑科技有限公司 | Wide-frequency dynamic damping vibration attenuation device of equipment installation base |
| CN103629297B (en) * | 2013-12-16 | 2015-08-12 | 洛阳双瑞橡塑科技有限公司 | Equipment mounting base wideband dynamic damping vibration damping equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20110914 Effective date of abandoning: 20130227 |
|
| RGAV | Abandon patent right to avoid regrant |