CN114411456A - Adjustable type rail bump leveller of quality - Google Patents
Adjustable type rail bump leveller of quality Download PDFInfo
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- CN114411456A CN114411456A CN202210197612.9A CN202210197612A CN114411456A CN 114411456 A CN114411456 A CN 114411456A CN 202210197612 A CN202210197612 A CN 202210197612A CN 114411456 A CN114411456 A CN 114411456A
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- mass
- vibration absorber
- steel rail
- rail
- rail vibration
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B19/00—Protection of permanent way against development of dust or against the effect of wind, sun, frost, or corrosion; Means to reduce development of noise
- E01B19/003—Means for reducing the development or propagation of noise
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- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Vibration Prevention Devices (AREA)
- Railway Tracks (AREA)
Abstract
The invention provides a mass-adjustable steel rail vibration absorber, which is at least connected with the rail bottom of a rail, and comprises an elastic body and an adjusting piece, wherein the adjusting piece is detachably connected with the elastic body; according to the mass-adjustable steel rail vibration absorber, when the damper parameters are adjusted on a construction site, the whole steel rail vibration absorber does not need to be largely disassembled and largely changed, only the adjusting piece with specific mass needs to be replaced, the operation is simple and convenient, the steel rail vibration absorber can be assembled and used immediately, the working efficiency of secondary frequency modulation is greatly improved, the operation is simple and convenient, and the accuracy of frequency modulation of the steel rail vibration absorber is favorably ensured.
Description
Technical Field
The invention relates to the technical field of track noise reduction equipment, in particular to a mass-adjustable steel rail vibration absorber.
Background
With the continuous development of rail vehicles such as urban subways, light rails and the like, the problems of urban traffic jam, environmental pollution and the like are greatly relieved, and meanwhile, the problem of railway vibration noise is gradually highlighted. In order to reduce the rail vibration during the operation of the train, people adopt various treatment measures, such as steel rail grinding, under-rail vibration damping fasteners, rail surface lubrication and the like. A large number of practices and researches show that after various novel damping tracks are used, serious defects such as corrugation and the like easily occur on the steel rail, the surface of the steel rail can be lubricated to improve the surface corrugation state of the steel rail, and certain hidden dangers exist on the driving safety. The steel rail damper can reduce wheel rail vibration from the source, and the current dynamic vibration absorber for reducing vibration and noise of the steel rail is widely applied to the field of rails.
In the prior art, patent publications CN201722566U and CN103343496B have a dynamic vibration absorber mounted on a rail, and the mass or rigidity of the vibration absorber is designed in advance to generate a resonance frequency corresponding to the vibration frequency of the rail, so as to transfer and dissipate the vibration energy of the wheel rail main vibration system. However, in the running process of the train, the excitation of the wheel axle to the steel rail is approximately the broadband excitation which changes continuously and is not fixed, and the excitation frequency of the wheel rail is changed if the steel rail is ground or the track is reformed. At present, the vibration absorbers are formed by one-time packaging, and need to be integrally removed after failure, and repeated accurate frequency modulation after the excitation frequency is changed cannot be realized, so that secondary frequency modulation cannot be realized after the existing steel rail tuned vibration absorbers are installed, the problems of complex field replacement operation and limited steel rail noise reduction effect exist, and a great improvement space is still left.
In order to realize secondary frequency modulation after the steel rail tuned vibration absorber is installed; prior patent CN113417174A discloses a rail vibration damping device, which can detach the damping block of the vibration damping assembly when the natural frequency of the rail vibration changes, and then adjust the damping material in the vibration absorbing cavity (increase or decrease the mass of particles), so that the natural frequency of the rail damper is adjusted to be consistent with the specific vibration frequency of the rail. However, in the secondary frequency modulation process, the whole damping block needs to be removed from the track system, and then the natural frequency of the vibration damping device can be adjusted, which undoubtedly increases the complex operation degree of the steel rail vibration absorber in the secondary frequency modulation process, and is not beneficial to improving the working efficiency of the secondary frequency modulation.
Disclosure of Invention
In view of this, the present invention aims to provide a mass-adjustable steel rail vibration absorber to solve the problem of low working efficiency caused by complicated operation of the steel rail vibration absorber in the secondary frequency modulation process in the prior art.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
the rail vibration absorber comprises an elastic body and an adjusting piece, wherein the adjusting piece is detachably connected with the elastic body, and the resonance frequency of the rail vibration absorber is changed by adjusting and replacing the adjusting piece with specific mass and utilizing the specific mass of the adjusting piece.
Further, at least one prefabricated hole is arranged in the elastic body, and the adjusting piece is detachably connected with the prefabricated hole.
Further, the adjusting piece comprises an adjusting bolt, and the adjusting bolt is connected with the prefabricated hole channel in a threaded connection mode.
Further, the adjusting bolt comprises a solid bolt and/or a hollow bolt.
Further, a cavity is arranged in the hollow bolt, and a mass block and/or damping particles are arranged in the cavity.
Further, the hole depth of the prefabricated hole channel is larger than or equal to the length of the adjusting bolt.
Further, the adjusting member comprises a mass and/or damping particles, and the mass and/or damping particles are arranged inside the prefabricated hole.
Furthermore, the damping loss factor range of the elastic body is 0.03-0.5.
Further, the prefabricated hole channels at least comprise a first hole channel and a second hole channel, and the first hole channel and the second hole channel are independently arranged or communicated with each other.
Further, the elastic body is attached to at least part of the structure of the rail bottom.
Compared with the prior art, the mass-adjustable steel rail vibration absorber has the following advantages:
according to the mass-adjustable steel rail vibration absorber, the specific mass of the adjusting piece is adjusted and replaced, the specific mass of the adjusting piece is used for changing the resonance frequency of the steel rail vibration absorber, secondary frequency modulation of the steel rail vibration absorber is achieved, and accordingly wheel rail vibration and radiation noise are effectively reduced. Simultaneously, when the damper parameter is adjusted at the job site, need not to tear open greatly to whole rail bump leveller and change greatly, only need replace the regulating part of specific quality can, easy operation is convenient, the dress is used promptly, has greatly improved secondary frequency modulation's work efficiency, and not only easy operation is convenient, is favorable to guaranteeing rail bump leveller frequency modulation's accurate degree moreover.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is an isometric view of a mass adjustable steel rail vibration absorber in a rail system according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a mass-tunable steel rail vibration absorber according to an embodiment of the present invention at another view angle in a track system;
fig. 3 is a schematic cross-sectional view of an elastic body in a mass-adjustable steel rail vibration absorber according to an embodiment of the present invention.
Description of reference numerals:
1. a track; 11. rail bottom; 12. a rail web; 2. an elastomer; 21. prefabricating a pore channel; 211. a first duct; 212. a second duct; 22. an adjustment member; 23. adjusting the bolt; 24. a hollow bolt; 241. a cavity; 25. a mass block; 26. damping the particles.
Detailed Description
The inventive concepts of the present disclosure will be described hereinafter using terms commonly employed by those skilled in the art to convey the substance of their work to others skilled in the art. These inventive concepts may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
In the prior art, after the tuned vibration absorber for the steel rail is installed, secondary frequency modulation cannot be achieved, the problems that field replacement operation is complex and complicated, and the noise reduction effect of the steel rail is limited exist, and a great improvement space is still provided. Meanwhile, for the conventional steel rail vibration absorber capable of performing secondary frequency modulation, the problem of complex operation often exists in the secondary frequency modulation process, and the secondary frequency modulation work efficiency is not improved
In order to solve the problem that the operation of the steel rail vibration absorber in the secondary frequency modulation process is complicated and the work efficiency is low in the prior art, the embodiment provides a quality-adjustable steel rail vibration absorber, as shown in fig. 1-3, in the conventional track system, the steel rail vibration absorber is arranged between any two adjacent sleepers, and the steel rail vibration absorber is at least connected with the rail bottom 11 of the track 1. The steel rail vibration absorber comprises an elastic body 2 and an adjusting piece 22, wherein the adjusting piece 22 is detachably connected with the elastic body 2, the resonant frequency of the steel rail vibration absorber is changed by adjusting and replacing the adjusting piece 22 with specific mass, and the secondary frequency modulation of the steel rail vibration absorber is realized by using the specific mass of the adjusting piece 22, so that the wheel rail vibration and the radiation noise are effectively reduced. Simultaneously, when the damper parameter is adjusted at the job site, need not to tear open greatly to whole rail bump leveller and change greatly, only need replace specific quality's regulating part 22 can, easy operation is convenient, the dress is used promptly, has greatly improved secondary frequency modulation's work efficiency, and not only easy operation is convenient, is favorable to guaranteeing rail bump leveller frequency modulation's accurate degree moreover.
For the steel rail vibration absorber, a spring mass system is formed between the elastic body 2 and each adjusting piece 22, the spring mass system comprises multiple orders of resonance frequency, and for any order of resonance frequency omega, the relationship between the equivalent modal stiffness k and the equivalent modal mass m of the elastic body 2 is as follows:
the elastic body 2 can be installed and used by adopting the installation mode of the existing steel rail vibration absorber in a track system. In the present application, the elastic body 2 is closely attached to at least a part of the structure of the rail base 11, and specifically, the rail 1 is fixed between rail fasteners (not shown), the elastic body 2 is adhered to the rail base 11 between two adjacent fasteners, or the elastic body 2 is fixed to the rail base 11 by using an elastic clip. Of course, in combination with a conventional steel rail structure, the elastic body 2 in the present application may be directly attached to the rail web 12 of the rail 1, or an antifriction and vibration reduction structure may be provided between the elastic body 2 and the rail web 12. Correspondingly, two elastic bodies 2 are respectively arranged on two sides of the same position of the track 1, and the two opposite elastic bodies 2 are completely the same in structure or mirror images of each other.
With regard to the specific structure of the elastic body 2, as shown in fig. 3, at least one prefabricated hole 21 is provided in the elastic body 2, and the adjusting piece 22 is detachably connected with the prefabricated hole 21. Preferably, the adjusting part 22 includes an adjusting bolt 23, and the adjusting bolt 23 is connected with the prefabricated pore canal 21 in a threaded connection manner, so that when the secondary frequency modulation is performed on the steel rail vibration absorber, the elastic body 2 does not need to be integrally disassembled, and only on the basis of ensuring the threaded relation, the adjusting bolt 23 is screwed out of the prefabricated pore canal 21 and disassembled, and the adjusting bolt 23 with a specific mass is adjusted, so that the operation is simple and convenient, the mounting and the use are performed immediately, and the accuracy of the frequency modulation of the steel rail vibration absorber is ensured.
In the elastic body 2, the number of the prefabricated hole channels 21 and the extending direction of the prefabricated hole channels 21 can be adjusted according to actual conditions, for example, as shown in fig. 3, the number of the prefabricated hole channels 21 is plural, any two of the prefabricated hole channels 21 can be communicated or separated, a through hole channel or an individual hole channel structure is correspondingly formed, any one of the prefabricated hole channels 21 can extend horizontally or vertically, and the prefabricated hole channel 21 can be set to extend along an inclined direction, which is not described in detail. Of course, if only one tunnel structure is provided in the elastomer body 2, the preformed tunnel 21 may be individually indicated as this one individual tunnel structure. The prefabricated porthole 21 can also be regarded as a collective term for a plurality of porthole structures, if this is the case in a plurality of porthole structure embodiments. In the present application, the prefabricated duct 21 at least includes a first duct 211 and a second duct 212, and the first duct 211 and the second duct 212 are independently disposed, or the first duct 211 and the second duct 212 are communicated; correspondingly, the preformed porthole 21 may also comprise a separate porthole structure.
The adjusting bolt 23 can be a conventional solid bolt or a hollow bolt 24, that is, the adjusting bolt 23 includes the solid bolt and/or the hollow bolt 24, a cavity 241 is provided in the hollow bolt 24, and a mass 25 and/or damping particles 26 are provided in the cavity 241, so that the hollow bolt 24 not only can retain a simple and convenient dismounting manner, but also can form a mass-tuned vibration absorber and/or a particle damper, which is beneficial to improving the damping performance of the rail vibration absorber.
For any prefabricated tunnel 21 structure, on the basis of fixed aperture, the depth of the prefabricated tunnel 21 is greater than or equal to the length of the adjusting bolt 23. If the hole depth of the prefabricated hole channel 21 is equal to the length of the adjusting bolt 23, directly assembling; if the hole depth of the prefabricated hole channel 21 is greater than the length of the adjusting bolt 23, the mass block 25 and/or the damping particles 26 can be arranged in the spatial structure left in the prefabricated hole channel 21, so that a mass tuning vibration absorber and/or a particle damper can be formed after the adjusting bolt 23 is installed, and the damping vibration attenuation performance of the steel rail vibration absorber can be improved. The hole depth of the prefabricated hole channel 21 and the length of the corresponding adjusting bolt 23 can be determined by calculation according to design requirements.
On the basis, the adjusting member 22 further comprises a mass 25 and/or damping particles 26, and the mass 25 and/or damping particles 26 are disposed inside the prefabricated tunnel 21. Specifically, the mass tuned vibration absorber and/or the particle damper is formed by arranging the mass block 25 and/or the damping particles 26 with specific mass in the cavity 241 of the hollow bolt 24 or the space structure left in the prefabricated hole 21, so as to change the resonance frequency of the steel rail vibration absorber and realize the secondary frequency modulation of the steel rail vibration absorber. This not only is favorable to improving the damping vibration attenuation performance of rail bump leveller, can confirm to form quality tuning bump leveller and/or granule attenuator to actual track system's demand moreover for the rail bump leveller in this application can satisfy the application requirement of different application scenes, is favorable to improving the application general-purpose property of rail bump leveller.
In addition, the mass block 25 may be a solid body, and of course, a cavity may be disposed inside the mass block 25, and damping particles 26 are disposed in the cavity, so that the mass block 25 may also be used as a particle damper.
For the mass blocks 25 with different masses, materials with different densities can be selected according to actual requirements, for example, conventional metal materials with different densities and/or conventional non-metal materials, and the like, specifically, conventional materials such as iron, lead, steel, rubber, plastic, stone, concrete, and the like, and even conventional metal materials and conventional non-metal materials are mixed.
The elastic body 2 is made of a high-damping viscoelastic material, and the damping loss factor range is 0.03-0.5, so that the damping vibration attenuation performance of the steel rail vibration absorber is improved. Preferably, the elastic body 2 is made of a high damping viscoelastic material such as rubber or polyurethane, while ensuring a damping loss factor.
Taking fig. 3 as an example, in the actual use process of the steel rail vibration absorber, according to the design scheme of vibration and noise reduction of the steel rail, if the wheel-rail excitation is broadband random excitation, the steel rail vibration absorber of the present application is made into a particle damper, damping particles 26 are filled in the second pore passage 212, all pore passages are sealed by bolts after filling is finished, when the mass in the particle damper needs to be changed, the bolts at the sealing positions of the first pore passages 211 are opened, a specific amount of damping particles 26 are discharged, and then the first pore passages 211 are sealed by bolts. If the wheel-rail excitation is mainly single or multiple frequency band excitation, the steel rail vibration absorber is made into a mass tuned vibration absorber, a mass block 25 is additionally arranged in a prefabricated pore channel 21, all pore channels are sealed by using bolts after the mass block is arranged, when the mass of the tuned vibration absorber needs to be changed, the bolts at the sealing positions of the prefabricated pore channel 21 are opened, the mass blocks 25 with different masses are replaced, and all pore channels are sealed by using the bolts.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. The rail vibration absorber with the adjustable mass is characterized in that the rail vibration absorber is at least connected with a rail bottom (11) of a rail (1), the rail vibration absorber comprises an elastic body (2) and an adjusting piece (22), the adjusting piece (22) is detachably connected with the elastic body (2), and the resonance frequency of the rail vibration absorber is changed by adjusting and replacing the adjusting piece (22) with specific mass and utilizing the specific mass of the adjusting piece (22).
2. A mass-adjustable steel rail vibration absorber according to claim 1, wherein at least one prefabricated tunnel (21) is provided in the elastic body (2), and the adjusting member (22) is detachably connected to the prefabricated tunnel (21).
3. The mass-adjustable steel rail vibration absorber as claimed in claim 2, wherein the adjusting member (22) comprises an adjusting bolt (23), and the adjusting bolt (23) is connected with the prefabricated tunnel (21) in a threaded manner.
4. A mass-adjustable steel rail vibration absorber according to claim 3, wherein the adjusting bolt (23) comprises a solid bolt and/or a hollow bolt (24).
5. A mass-adjustable steel rail vibration absorber according to claim 4, wherein a cavity (241) is arranged in the hollow bolt (24), and a mass (25) and/or damping particles (26) are arranged in the cavity (241).
6. The mass-adjustable steel rail vibration absorber as claimed in claim 2, wherein the depth of the prefabricated hole (21) is greater than or equal to the length of the adjusting bolt (23).
7. A mass-adjustable rail vibration absorber according to claim 2, wherein the adjusting member (22) comprises a mass (25) and/or damping particles (26), and the mass (25) and/or damping particles (26) are arranged inside the prefabricated tunnel (21).
8. The mass-adjustable steel rail vibration absorber as recited in claim 2, wherein the prefabricated hole (21) comprises at least a first hole (211) and a second hole (212), the first hole (211) and the second hole (212) are independent from each other, or the first hole (211) is communicated with the second hole (212).
9. The mass-adjustable steel rail vibration absorber as claimed in claim 1, wherein the damping loss factor of the elastic body (2) is in the range of 0.03 to 0.5.
10. A mass-tuned rail absorber according to claim 1 wherein the elastomer (2) is bonded to at least part of the structure of the rail foot (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210197612.9A CN114411456A (en) | 2022-03-02 | 2022-03-02 | Adjustable type rail bump leveller of quality |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210197612.9A CN114411456A (en) | 2022-03-02 | 2022-03-02 | Adjustable type rail bump leveller of quality |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114411456A true CN114411456A (en) | 2022-04-29 |
Family
ID=81261836
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210197612.9A Pending CN114411456A (en) | 2022-03-02 | 2022-03-02 | Adjustable type rail bump leveller of quality |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114411456A (en) |
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2022
- 2022-03-02 CN CN202210197612.9A patent/CN114411456A/en active Pending
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