CN214219231U

CN214219231U - Steel rail energy dissipation device

Info

Publication number: CN214219231U
Application number: CN202022387371.3U
Authority: CN
Inventors: 李超; 丁德云; 孙方遒; 邵斌; 程奕龙
Original assignee: Beijing Jiuzhou First Rail Environmental Technology Co ltd
Current assignee: Beijing Jiuzhou First Rail Environmental Technology Co ltd
Priority date: 2020-10-23
Filing date: 2020-10-23
Publication date: 2021-09-17
Anticipated expiration: 2030-10-23

Abstract

The disclosure relates to the technical field of rail transit vibration isolation and discloses a steel rail energy consumption device. The damping unit comprises an elastic material body connected with the steel rail and at least one mass body embedded in the elastic material body, wherein one part of the outer contour of the elastic material body is consistent with one part of the side contour of the steel rail, so that the elastic material body is abutted against the steel rail. The steel rail energy dissipation device provided by the disclosure can dissipate more vibration energy of the steel rail.

Description

Steel rail energy dissipation device

Technical Field

The disclosure relates to the technical field of rail transit vibration isolation, in particular to a steel rail energy dissipation device.

Background

With the rapid development of rail transit in China, the selection of travel transportation modes of people is more diversified, and the living standard is remarkably improved. But the requirement of people on the environment is higher and higher, although the rail transit facilitates the outgoing of people, the vibration and noise pollution of the rail transit bring negative influence to the normal life of residents along the line. Vibration and noise of rail transit not only influence normal life of residents along the line, but also can cause fatigue damage of related rail equipment, and the service life of the rail transit is directly shortened.

At present, the vibration reduction and noise reduction measures for rail transit in China are various, most measures only play a role in isolating vibration noise, vibration noise energy is not eliminated from the source, and the most vibration reduction and noise reduction measures have the conditions of complex construction process, difficulty in later maintenance and repair, low equipment working efficiency and the like.

SUMMERY OF THE UTILITY MODEL

An object of the present disclosure is to solve at least one aspect of the above problems and disadvantages in the related art.

According to an embodiment of the present disclosure, there is provided a rail energy dissipation device including a damping unit installed between two adjacent fastening pieces of a rail, the damping unit including an elastic material body connected to the rail and at least one mass body embedded in the elastic material body, a portion of an outer contour of the elastic material body corresponding to a portion of a side contour of the rail such that the elastic material body abuts against the rail.

In some embodiments, the body of resilient material comprises a first portion lying below and a second portion lying above, the first portion resting against a top surface of the foot of the rail and a portion of a side surface of the web of the rail, and the second portion resting against a bottom surface of the head of the rail and another portion of a side surface of the web of the rail.

In some embodiments, the mass is embedded in the first portion and/or the second portion of the body of resilient material.

In some embodiments, the mass is a cylindrical metal structure, the axis of which is parallel to the direction of extension of the rail.

In some embodiments, the body of elastomeric material is affixed to the rail by an acoustic couplant.

In some embodiments, the number of the damping units is two, and the two damping units are respectively arranged on two opposite sides of the steel rail.

In some embodiments, the damping unit further comprises a clamp for clamping the damping unit to the rail, the clamp comprising a clamp body and an insulating layer disposed on an outer surface of the clamp body.

In some embodiments, the clip body comprises two clamping portions located on opposite sides of the rail, one clamping portion being clamped to the top surface of the foot of the rail and the other clamping portion being clamped to the body of elastomeric material, and a connecting portion for connecting the two clamping portions, the connecting portion being located below the rail.

In some embodiments, the free end of the clamping portion clamped to the body of resilient material abuts against the body of resilient material and is inclined towards the rail.

In some embodiments, a stress ring is disposed between the clamp portion and the attachment portion of the chuck body.

According to the steel rail energy consumption device provided by the disclosure, the vibration reduction unit is arranged on the steel rail, the elastic material body of the vibration reduction unit not only has a very high loss factor to effectively transmit and dissipate energy and ensure the energy consumption efficiency, but also has the properties of good elastic performance and the like to restrain the movement of the mass body when the mass body generates resonance, so that the mass body is prevented from damaging the elastic material body, and the service life and the use safety of the energy consumption device are effectively improved. In addition, a plurality of mass bodies are embedded in the elastic material body, so that the overall configuration is high, and the vibration energy of the steel rail can be dissipated more.

Drawings

Fig. 1 is a schematic structural diagram of a preferred embodiment of a steel rail energy dissipation device according to the present disclosure.

Fig. 2 is a schematic structural diagram of another preferred embodiment of a steel rail energy dissipation device according to the present disclosure.

Detailed Description

While the present disclosure will be fully described with reference to the accompanying drawings, which contain preferred embodiments of the disclosure, it should be understood before this description that one of ordinary skill in the art can modify the disclosure described herein while obtaining the technical effects of the present disclosure. Therefore, it should be understood that the foregoing description is a broad disclosure directed to persons of ordinary skill in the art, and that there is no intent to limit the exemplary embodiments described in this disclosure.

Furthermore, in the following detailed description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the embodiments of the disclosure. It may be evident, however, that one or more embodiments may be practiced without these specific details. In other instances, well-known structures and devices are shown in schematic form in order to simplify the drawing.

According to the general inventive concept of the present disclosure, there is provided a rail energy dissipation device, including a damping unit installed between two adjacent fastening pieces of a rail, the damping unit including an elastic material body connected to the rail and at least one mass body embedded in the elastic material body, a portion of an outer profile of the elastic material body corresponding to a portion of a side profile of the rail such that the elastic material body abuts against the rail.

Fig. 1 is a schematic structural diagram of a preferred embodiment of a steel rail energy dissipation device according to the present disclosure. Fig. 2 is a schematic structural diagram of another preferred embodiment of a steel rail energy dissipation device according to the present disclosure. As shown in fig. 1 and 2, the rail energy dissipation device comprises a damping unit mounted between two adjacent fastening elements of the rail, the damping unit comprising a body of elastomeric material connected to the rail and a plurality of masses 3 embedded in the body of elastomeric material, a portion of the outer profile of the body of elastomeric material corresponding to a portion of the side profile of the rail, so that the body of elastomeric material can rest against the rail. According to the steel rail energy consumption device provided by the disclosure, the vibration reduction unit is arranged on the steel rail, the elastic material body of the vibration reduction unit not only has a very high loss factor to effectively transmit and dissipate energy and ensure the energy consumption efficiency, but also has the properties of good elastic performance and the like to restrain the movement of the mass body 3 when the mass body 3 generates resonance, so that the mass body 3 is prevented from damaging the elastic material body, and the service life and the use safety of the energy consumption device are effectively improved. In addition, a plurality of mass bodies 3 are embedded in the elastic material body, so that the overall configuration is high, and the vibration energy of the steel rail can be dissipated more.

In an exemplary embodiment, as shown in fig. 1 and 2, the body of elastomeric material comprises a first portion 21 located below and a second portion 22 located above, the first portion 21 resting on the top surface of the foot 11 of the rail and on one part of the side surface of the web 12 of the rail, the second portion 22 extending upwards from the first portion 21 and resting on the bottom surface of the head 13 of the rail and on the other part of the side surface of the web 12 of the rail. The steel rail energy dissipation device fully utilizes the space on the side surface of the steel rail by extending the elastic material body to the bottom of the rail head 13 of the steel rail, and the contact area of the elastic material body and the steel rail is larger, so that the steel rail energy dissipation device can absorb more steel rail vibration energy and convert the vibration energy into heat or other energy for dissipation.

In an exemplary embodiment, as shown in fig. 1 and 2, the mass body 3 is a cylindrical metal structure, the axis of which is parallel to the extension direction of the steel rail. However, it will be appreciated by those skilled in the art that other shapes of the mass may be used in other embodiments of the present disclosure, such as a mass having a polygonal cross-section.

In an exemplary embodiment, as shown in fig. 1 and 2, a plurality of masses 3 are spaced within the elastomeric body, which corresponds to the addition of multiple stages of dynamic vibration absorbing subsystems on the rails. Therefore, the steel rail vibration energy conversion mode is more, the energy consumption efficiency is higher, and the vibration reduction and noise reduction performance is better. Specifically, the number of the mass bodies 3, the ratio of the upper layer mass body to the lower layer mass body, the position of the mass bodies and the like can be determined by establishing a finite element model and performing finite element calculation analysis, so that the vibration reduction frequency band of the mass bodies 3 is wider, the vibration of the steel rail is more effectively reduced, and the trackside noise is reduced. It should be noted that, in some other embodiments of the present disclosure, the number of the mass bodies 3 may also be one.

In an exemplary embodiment, as shown in fig. 1, the mass body 3 is embedded only in the first portion 21 of the elastic material body, which increases the cross-sectional area ratio of the elastic material body, and the noise reduction effect can be greatly improved, which is equivalent to adding a small-sized constraint damping vibration absorber system on the upper portion of the steel rail energy dissipation device. However, in another exemplary embodiment of the present disclosure, as shown in fig. 2, the mass body 3 may also be embedded within the first and

second portions

21, 22 of the body of elastomeric material. The structure is equivalent to that a primary dynamic vibration absorption subsystem is additionally arranged at the upper part of the steel rail energy consumption device, so that the vibration absorption frequency band can be widened, and the vibration absorption and noise reduction effects can be improved. It should be noted that in other embodiments of the present disclosure, the mass 3 may be embedded only in the second portion 22 of the body of elastomeric material.

In one exemplary embodiment, as shown in fig. 1 and 2, the body of elastomeric material is affixed to the rail by an acoustic couplant. The acoustic coupling agent can fill a gap between an elastic material body of the vibration damping unit and the surface roughness of the steel rail, and has a certain bonding effect, so that the vibration damping unit is more tightly attached to the steel rail, and the vibration transmission is more effective.

In an exemplary embodiment, as shown in fig. 1 and 2, the elastic material body is provided with a groove 5 for installation and transportation of the device, so that the construction efficiency and operability of the device can be greatly improved.

In an exemplary embodiment, as shown in fig. 1 and 2, the rail energy dissipation device further comprises a clamp 4 for clamping the damping unit on the rail to further ensure a reliable connection between the damping unit and the rail. Preferably, the number of the fixtures 4 is plural, and the plurality of fixtures 4 are arranged at intervals along the extending direction of the steel rail.

In an exemplary embodiment, as shown in fig. 1 and 2, the number of the damping units is two, and the two damping units are respectively disposed at opposite sides of the rail. It should be noted that, in some other embodiments of the present disclosure, one damping unit may be adopted, which may be disposed on the outer side of the rail or disposed on the inner side of the rail.

In an exemplary embodiment, as shown in fig. 1 and 2, the chuck 4 includes a chuck body, which may be made of a metallic material, for example, and an insulating layer disposed on the entire outer surface of the chuck. The insulating layer may be formed, for example, by spray-coating the surface of the fixture body so that the fixture 4 can safely act on the rail.

In an exemplary embodiment, as shown in fig. 1 and 2, the clip 4 is of a U-shaped configuration comprising two clamping portions located on opposite sides of the rail, one of which is clamped to the top surface of the rail foot 11 of the rail, and the other of which is clamped to the body of resilient material, and a connecting portion for connecting the two clamping portions, the connecting portion being located below the rail.

In an exemplary embodiment, as shown in fig. 1 and 2, the free end of the clamping portion clamped on the body of elastomeric material abuts against the body of elastomeric material and is inclined towards the rail.

In an exemplary embodiment, as shown in fig. 1 and 2, a stress ring is provided between the clamping portion and the connecting portion of the fixture body, and the stress ring can increase the fastening force of the fixture 4, so that the damping unit can be more stably mounted on both sides of the rail and can be deformed to facilitate the mounting and dismounting of the fixture 4.

According to the steel rail energy consumption device disclosed by the invention, a finite element model can be established for simulation according to the vibration noise characteristics and the corrugation current situation of a specific track system, and the result is analyzed to adjust the number, size or position of the mass bodies 3, so that the structure of the mass bodies 3 can play a greater role for the track system and cover the corrugation dominant frequency, thereby effectively preventing and treating corrugation and prolonging the service life of the steel rail.

In conclusion, the steel rail energy dissipation device provided by the disclosure absorbs and attenuates vibration noise of the wheel rail through the elastic material body and the mass body 3 embedded in the elastic material body by the vibration attenuation unit between two adjacent fasteners of the rail, wherein the vibration attenuation unit comprises the elastic material body connected with the steel rail and the mass body 3 embedded in the elastic material body, so that the purpose of reducing vibration of the steel rail is achieved, the noise radiated outside by the steel rail is reduced, the vibration and noise influence on the surrounding environment caused by the passing of rail traffic vehicles is reduced, the vibration of the surrounding environment is improved, and green and harmonious urban living, working and experimental conditions are constructed. The energy dissipation device for the steel rail is not limited by the space at the lower part of the steel rail, and is suitable for laying new lines and reconstructing old lines. The effect of reducing the vibration frequency of the steel rail is achieved under the process conditions of not replacing fasteners, ballast beds and the like. The steel rail energy dissipation device can be used for newly-built lines, can also be conveniently installed on old lines which are already running, and can effectively reduce vibration and noise, prevent and control corrugation and prolong the service life of the steel rail.

The present disclosure is to be considered as limited only by the preferred embodiments and not limited to the specific embodiments described herein, and all changes, equivalents, and modifications that come within the spirit and scope of the disclosure are desired to be protected.

Claims

1. A rail energy dissipation device, comprising a damping unit mounted between two adjacent fastening elements of a rail, the damping unit comprising a body of elastomeric material connected to the rail and at least one mass embedded within the body of elastomeric material, a portion of the outer profile of the body of elastomeric material conforming to a portion of the side profile of the rail such that the body of elastomeric material abuts the rail.

2. A rail energy dissipation device as defined in claim 1, wherein said body of elastomeric material comprises a first portion lying below and a second portion lying above, said first portion resting against a top surface of the foot of said rail and a portion of a side surface of the web of said rail, said second portion resting against a bottom surface of the head of said rail and another portion of a side surface of the web of said rail.

3. A rail energy dissipation device as claimed in claim 2, wherein said mass is embedded in said first portion and/or said second portion of said body of elastomeric material.

4. A rail energy dissipation device as defined in claim 1, wherein the mass is a cylindrical metal structure having an axis parallel to the direction of extension of the rail.

5. A rail energy dissipation device as defined in claim 1, wherein said body of elastomeric material is adhered to said rail by an acoustic couplant.

6. The steel rail energy consumption device according to claim 1, wherein the number of the damping units is two, and the two damping units are respectively arranged on two opposite sides of the steel rail.

7. A rail energy dissipation device as defined in any one of claims 1 to 6, further comprising a clamp for clamping the damping unit to the rail, the clamp comprising a clamp body and an insulating layer disposed on an outer surface of the clamp body.

8. A rail energy dissipation device according to claim 7, wherein said clip body comprises two clamping portions and a connecting portion for connecting said two clamping portions, said two clamping portions being located on opposite sides of said rail, one of said clamping portions being clamped to a top surface of a foot of said rail and the other of said clamping portions being clamped to said body of resilient material, said connecting portion being located below said rail.

9. A rail energy dissipation device as claimed in claim 8, wherein the free end of said clip portion which clips onto said body of resilient material abuts against said body of resilient material and is inclined towards said rail.

10. A rail energy dissipation device as claimed in claim 8, wherein a stress ring is provided between the clamping portion and the connection portion of the clamp body.