CN210946313U - Dynamic vibration absorber for corrugation steel rail - Google Patents
Dynamic vibration absorber for corrugation steel rail Download PDFInfo
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- CN210946313U CN210946313U CN201921782620.XU CN201921782620U CN210946313U CN 210946313 U CN210946313 U CN 210946313U CN 201921782620 U CN201921782620 U CN 201921782620U CN 210946313 U CN210946313 U CN 210946313U
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Abstract
The utility model discloses a dynamic vibration absorber for ripples grinds rail, including the first quality part of two relative settings and the second quality part of two relative settings, be used for setting up the rail between two second quality parts, set up a first quality part between every second quality part and the rail, every first quality part is connected in rail web of rail through first damping part and first elastomeric element, and every second quality part passes through second damping part and second elastomeric element and connects in the first quality part that corresponds. The application the utility model discloses a dynamic vibration absorber for ripples mill rail shakes to the specific vibration frequency that rail ripples mill arouses and shakes to shake and fall and make an uproar, avoids the resonance phenomenon between single dynamic vibration absorber and the rail, improves the damping rate of the specific frequency vibration that the rail arouses to the ripples mill, can effectively reduce the average energy level of rail vibration, reduces rail vibration amplitude and acceleration.
Description
Technical Field
The utility model relates to a track traffic engineering technical field, in particular to a dynamic vibration absorber for ripples mill rail.
Background
With the leap-type development of high-speed railways and urban rail transit construction in China, the running environment of trains becomes complex and diversified, so that the damage problem of each part of the trains and the rails becomes more and more serious, and the contact damage of wheel rails, particularly the wavy abrasion of steel rails, is a very obvious problem.
The corrugation phenomenon of the steel rail can occur on a high-speed rail and also commonly exists in medium and low-speed rail traffic such as a subway and the like. When a train passes through a wave-ground section of a steel rail, the force of a wheel rail is increased sharply, and severe vibration and noise of a rail and a rolling stock are also increased, so that the running quality of the train is seriously affected, and the derailment risk is increased. Therefore, it is necessary to further study the vibration damping performance of the rail corrugation section by using new technology.
Chinese patent CN1807756A discloses a dynamic absorption multilayer constrained damping steel rail muffler, which is structurally characterized in that multilayer constrained damping is pasted on the rail web and the rail wing of a steel rail, and the muffler is a high-elasticity energy consumption material layer from inside to outside: the damping device comprises a first mass layer, a first damping layer, a first constraint layer, a second damping layer, a second constraint layer, a third damping layer, a third constraint layer and a protective layer. This technique has some disadvantages: the steel rail vibration reduction device only belongs to a damping vibration absorption structure in principle through a multi-layer damping constraint structure, can absorb a part of energy of steel rail vibration, but cannot achieve the effect of reducing vibration in a frequency range needing to control the vibration level according to the vibration spectrum characteristic of practical problems.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the current multilayer damping rail noise eliminator that exists among the prior art, belong to the damping in principle and inhale the shake, although it can absorb the energy of a part rail vibration, nevertheless can not realize reducing the above-mentioned not enough of vibration according to the vibration spectral characteristic of practical problem in the frequency range that needs control vibration level, provide a dynamic vibration absorber for ripples mill rail.
In order to realize the purpose of the utility model, the utility model provides a following technical scheme:
a dynamic vibration absorber for corrugation of a steel rail comprises two oppositely arranged first mass parts and two oppositely arranged second mass parts, the steel rail is arranged between the two second mass parts, one first mass part is arranged between each second mass part and the steel rail, each first mass part is connected to the rail web of the steel rail through a first damping part and a first elastic part, and each second mass part is connected to the corresponding first mass part through a second damping part and a second elastic part;
the first mass member and the second mass member are adjustable in mass value, structural form, size, and material, and the first damping member, the first elastic member, the second damping member, and the second elastic member are adjustable in dynamic parameters.
The first mass component and the second mass component are provided with different mass values, different structural forms, different material attributes and sizes according to actual installation space and vibration reduction requirements, and the damping values of the first damping component and the second damping component and the rigidity values of the first elastic component and the second elastic component are calculated and set according to the frequency caused by rail corrugation.
Because the rail corrugation is irregular periodically, the wavelength at a specific position is single, and the frequency of the vibration excited when a rail vehicle passes through at a certain speed is single, the dynamic vibration absorber for corrugation the steel rail is adopted, based on the principle of the dynamic vibration absorber, the vibration from the steel rail is absorbed by arranging the mass parts connected with the spring damping parts at the two sides of the rail web of the steel rail, the first mass part and the first damping part connected with the first mass part and the first elastic part are mainly used for absorbing vibration, the second mass part and the second damping part connected with the second mass part are mainly used for reducing the feedback vibration of the first mass part to the steel rail, so as to avoid the first mass part and the steel rail from resonating, by reasonably selecting the mass size and the structural form of the mass component, and the dynamic parameters of the spring and the damper, the vibration phase of the mass component is opposite to that of the steel rail on the rail corrugation frequency band, so that the harmful vibration of the steel rail in the frequency band is effectively eliminated, and the purpose of reducing the vibration component of the steel rail main body is realized.
Preferably, the first mass member and the second mass member are located on the same axis.
Preferably, the first damping member and the second damping member are located on the same axis.
Preferably, the first elastic member and the second elastic member are located on the same axis.
Preferably, the first mass member and the second mass member are both mass blocks.
Preferably, the mass block is provided with a slot or a hole for adjusting the mass size.
Preferably, the first damping member and the second damping member are both dampers.
Preferably, the first elastic member and the second elastic member are both springs.
Preferably, the first damping part and the first elastic part are replaced with an elastic element having damping, and the second damping part and the second elastic part are replaced with the elastic element having damping.
Preferably, the elastic element with damping is a rubber structural member.
Preferably, the rubber structural member is a rubber block or a rubber pad.
To sum up, owing to adopted above-mentioned technical scheme, the beneficial effects of the utility model are that:
1. the dynamic vibration absorber for the corrugation steel rail is applied, the vibration absorption and the noise reduction are carried out aiming at the specific vibration frequency caused by the corrugation of the steel rail, the resonance phenomenon between the single dynamic vibration absorber and the steel rail is avoided, the attenuation rate of the steel rail to the vibration of the specific frequency caused by the corrugation is improved, the average energy level of the vibration of the steel rail can be effectively reduced, and the vibration amplitude and the acceleration of the steel rail are reduced;
2. the dynamic vibration absorber for the corrugation steel rail effectively realizes vibration reduction and noise reduction of specific frequency of a corrugation section of the steel rail, can greatly reduce friction self-excited vibration intensity of a wheel rail system and fluctuation range of normal contact force between wheel rails, inhibits formation trend of corrugation, can reduce formation and development of corrugation to a certain extent, reduces grinding times of the steel rail, reduces grinding cost of the steel rail, and prolongs service life of the steel rail;
3. application a dynamic vibration absorber for ripples mill rail, simple structure is practical, the installation is quick simple and convenient, low cost.
Drawings
Fig. 1 is a schematic perspective view of a dynamic vibration absorber for corrugation rail according to the present invention;
FIG. 2 is an enlarged partial schematic view of FIG. 1;
FIG. 3 is a top view of FIG. 1;
fig. 4 is a side view of fig. 1.
The labels in the figure are: 1-a rail, 2-a first mass part, 3-a second mass part, 4-a first damping part, 5-a first elastic part, 6-a second damping part, 7-a second elastic part.
Detailed Description
The present invention will be described in further detail with reference to test examples and specific embodiments. However, it should not be understood that the scope of the above-mentioned subject matter is limited to the following embodiments, and all the technologies realized based on the present invention are within the scope of the present invention.
Example 1
As shown in fig. 1-4, the dynamic vibration absorber for corrugation of steel rails according to the present invention includes two first mass parts 2 disposed opposite to each other and two second mass parts 3 disposed opposite to each other.
A rail 1 is disposed between two second mass members 3, one first mass member 2 is disposed between each second mass member 3 and the rail 1, each first mass member 2 is connected to a rail web of the rail 1 through a first damping member 4 and a first elastic member 5, each second mass member 3 is connected to the corresponding first mass member 2 through a second damping member 6 and a second elastic member 7, the first mass member 2 and the second mass member 3 are located on the same axis, the first damping member 4 and the second damping member 6 are located on the same axis, and the first elastic member 5 and the second elastic member 7 are located on the same axis.
Specifically, the first mass member 2 is a first mass block, the second mass member 3 is a second mass block, the first damping member 4 is a first damper, the first elastic member 5 is a first spring, the second damping member 6 is a second damper, and the second elastic member 7 is a second spring.
The mass values, structural forms, dimensions and materials of the first mass member 2 and the second mass member 3 can be adjusted, the dynamic parameters of the first damping member 4, the first elastic member 5, the second damping member 6 and the second elastic member 7 can be adjusted, the first mass member 2, the first damping member 4 connected with the first mass member 2 and the first elastic member 5 connected with the first mass member are mainly used for vibration absorption and vibration reduction of the steel rail 1, and the second mass member 3, the second damping member 6 connected with the second mass member 3 and the second elastic member 7 connected with the second mass member are mainly used for reducing feedback vibration of the first mass member 2 to the steel rail 1, so that the first mass member 2 and the steel rail 1 are prevented from resonating.
Selecting a reasonable mass ratio according to the actual installation space and the vibration reduction requirement for the mass values of the first mass component 2 and the second mass component 3, further determining the mass value of the first mass component 2, and then calculating and determining the mass value of the second mass component 3 according to the specific mass ratio.
The damping values of the first damping part 4 and the second damping part 6 and the rigidity values of the first elastic part 5 and the second elastic part 7 are set according to the frequency calculation caused by the corrugation of the steel rail 1; because the corrugation of the steel rail 1 is periodic wavy irregularity with a certain rule, the wavelength at a specific position is single, the wavelength can be assumed to be lambda, and the vibration frequency of the steel rail 1 excited by the rail vehicle passing through at the speed V can be calculated by the following formula:
f＝V/λ
the connection stiffness value k of the first damping part 4 and the damping value c of the first elastic part 5 between the steel rail 1 and the first mass part 2 are determined according to the conventional small mass ratio (generally less than 0.1) dynamic vibration absorber classical design formula as follows:
K＝M(2πf)2
μ＝m/M
wherein M is the mass of the first mass part 2, M is the equivalent modal mass of the steel rail 1 between two longitudinal adjacent vibration absorbers, K is the equivalent modal stiffness of the steel rail 1 between two longitudinal adjacent vibration absorbers, f is the corrugation frequency of the steel rail 1 to be reduced, and μ is the mass ratio.
Similarly, the stiffness value of the second damping member 6 and the damping value of the second elastic member 7 can be calculated according to the above formula.
The first mass part 2, the first damping part 4 and the first elastic part 5 form a set of dynamic vibration absorber system relative to the steel rail 1, the second mass part 3, the second damping part 6 and the second elastic part 7 form another set of dynamic vibration absorber system relative to the first mass part 2, the specific dynamic parameter characteristics of the dynamic vibration absorber system can be reasonably matched and designed according to the specific vibration frequency caused by the corrugation of the steel rail 1, the damping dynamic vibration absorber systems with specific dynamic parameters are arranged on the two transverse sides of the steel rail 1 where the corrugation zone appears, and a series of homotype damping dynamic vibration absorbers are arranged at equal intervals in the longitudinal direction, so that the vibration and noise caused by the corrugation of the steel rail 1 can be effectively reduced, the vibration amplitude and the acceleration of the steel rail 1 are reduced, and the running safety and the running stability of a vehicle are improved.
As a preferable solution of this embodiment, the first mass block and the second mass block are provided with a slot or a hole for adjusting the mass size.
The dynamic vibration absorber for the corrugation steel rail, which is disclosed by the utility model, can absorb vibration and reduce noise aiming at the specific vibration frequency caused by the corrugation of the steel rail 1, avoid the resonance phenomenon between the single dynamic vibration absorber and the steel rail 1, improve the attenuation rate of the vibration of the steel rail 1 to the specific frequency caused by the corrugation, effectively reduce the average energy level of the vibration of the steel rail 1, reduce the vibration amplitude and the acceleration of the steel rail 1, effectively realize the vibration and noise reduction of the specific frequency of the section of the corrugation steel rail 1, greatly reduce the friction self-excited vibration intensity of a wheel-rail system and the fluctuation range of the normal contact force between the wheel rails, inhibit the formation trend of the corrugation, reduce the formation and the development of the corrugation to a certain extent, reduce the grinding times of the steel rail 1, reduce the grinding cost of the steel rail 1, improve the service life of the steel rail 1, and the dynamic vibration absorber for the corrugation steel rail, simple structure is practical, and the installation is quick simple and convenient, low cost.
Example 2
A dynamic vibration absorber for ripples mill rail, with embodiment 1's difference lie in, in this embodiment, will first damping part 4 with first elastomeric element that has damping is replaced to first elastomeric element, will second damping part 6 with second elastomeric element 7 is replaced to the second has damped elastomeric element, first elastomeric element that has damping and second have damped elastomeric element are rubber structure, specifically, rubber structure is block rubber or rubber pad.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A dynamic vibration absorber for corrugation of a steel rail, characterized by comprising two oppositely arranged first mass parts (2) and two oppositely arranged second mass parts (3), a steel rail (1) is arranged between the two second mass parts (3), one first mass part (2) is arranged between each second mass part (3) and the steel rail (1), each first mass part (2) is connected to the rail web of the steel rail (1) through a first damping part (4) and a first elastic part (5), and each second mass part (3) is connected to the corresponding first mass part (2) through a second damping part (6) and a second elastic part (7);
wherein the mass values, structural forms, dimensions and materials of the first mass member (2) and the second mass member (3) can be adjusted, and the dynamic parameters of the first damping member (4), the first elastic member (5), the second damping member (6) and the second elastic member (7) can be adjusted.
2. A dynamic vibration absorber for corrugation rails according to claim 1, wherein the first mass part (2) and the second mass part (3) are located on the same axis.
3. A dynamic vibration absorber for corrugation rails according to claim 1, wherein the first damping part (4) and the second damping part (6) are located on the same axis.
4. The dynamic vibration absorber for corrugation rails of claim 1, wherein the first elastic member (5) and the second elastic member (7) are located on the same axis.
5. The dynamic vibration absorber for corrugation rails of claim 1, wherein the first mass part (2) and the second mass part (3) are both mass blocks.
6. The dynamic vibration absorber for corrugation rails of claim 5 wherein the mass is provided with slots or holes.
7. A dynamic vibration absorber for corrugation rails as claimed in claim 1, characterized in that the first damping part (4) and the second damping part (6) are both dampers.
8. The dynamic vibration absorber for corrugation rails of claim 1, wherein the first elastic member (5) and the second elastic member (7) are both springs.
9. The dynamic vibration absorber for corrugation of steel rails according to any of claims 1 to 8, wherein the first damping part (4) and the first elastic part (5) are replaced by an elastic element with damping, and the second damping part (6) and the second elastic part (7) are replaced by an elastic element with damping.
10. The dynamic vibration absorber for corrugation rails of claim 9 wherein the resilient element with damping is a rubber structural member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921782620.XU CN210946313U (en) | 2019-10-22 | 2019-10-22 | Dynamic vibration absorber for corrugation steel rail |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921782620.XU CN210946313U (en) | 2019-10-22 | 2019-10-22 | Dynamic vibration absorber for corrugation steel rail |
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| Publication Number | Publication Date |
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| CN210946313U true CN210946313U (en) | 2020-07-07 |
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| CN201921782620.XU Active CN210946313U (en) | 2019-10-22 | 2019-10-22 | Dynamic vibration absorber for corrugation steel rail |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110593025A (en) * | 2019-10-22 | 2019-12-20 | 中铁二院工程集团有限责任公司 | Dynamic vibration absorber for corrugation steel rail |
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2019
- 2019-10-22 CN CN201921782620.XU patent/CN210946313U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110593025A (en) * | 2019-10-22 | 2019-12-20 | 中铁二院工程集团有限责任公司 | Dynamic vibration absorber for corrugation steel rail |
| CN110593025B (en) * | 2019-10-22 | 2024-03-26 | 中铁二院工程集团有限责任公司 | Dynamic vibration absorber for wave-grinding steel rail |
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