CN114561836A - Nonlinear steel rail damper and steel rail damping system - Google Patents
Nonlinear steel rail damper and steel rail damping system Download PDFInfo
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- CN114561836A CN114561836A CN202210268299.3A CN202210268299A CN114561836A CN 114561836 A CN114561836 A CN 114561836A CN 202210268299 A CN202210268299 A CN 202210268299A CN 114561836 A CN114561836 A CN 114561836A
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- damper
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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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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B2201/00—Fastening or restraining methods
- E01B2201/10—Fastening or restraining methods in alternative ways, e.g. glueing, welding, form-fits
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T30/00—Transportation of goods or passengers via railways, e.g. energy recovery or reducing air resistance
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Abstract
The invention relates to the field of railway transportation, in particular to a nonlinear steel rail damper and a steel rail damping system, which comprise an Euler beam, a vibration absorption mass block, a bracket, a rubber damper and a mounting plate; the two ends of the Euler beam are supported by the bracket, the middle part of the Euler beam is fixed on the vibration absorption mass block, and the vibration absorption mass block is fixed on the rubber damper; the support with the rubber damper is all fixed in on the mounting panel. Compared with the prior art, the nonlinear steel rail damper and the steel rail damping system have the advantages that the Euler beam is adopted as a nonlinear stiffness output element, the access length and the vibration absorption quality of the beam are adjusted, different vibration suppression frequencies can be adjusted, compared with a common steel rail damper, the nonlinear steel rail damper has a wider vibration suppression frequency band, and the medium-high frequency vibration phenomenon of a steel rail is effectively improved.
Description
Technical Field
The invention relates to the field of railway transportation, in particular to a nonlinear steel rail damper and a steel rail damping system.
Background
While the urban rail transit is rapidly developed in China, the problems of environmental vibration and noise pollution are caused in the operation process, the working and life quality of residents along the line is directly influenced, and the vibration noise problem and the environmental sound caused by the operation of the urban rail transit are increasingly concerned by society. Noise sources of trains include wheel-rail noise caused by the excitation of wheel-rail surfaces to each other, vibration noise of external structures caused by the transmission of rail vibrations through the track structure, and train traction noise, aerodynamic noise, etc. The wheel-track noise is a main noise source in the operating speed interval of the urban rail train.
To making an uproar falling of wheel rail noise, have the track and the wheel that adopt novel damping structure, use elastic fastener, multiple modes such as rail of polishing, wherein the widest mode of adaptability is installation rail attenuator. However, the existing market products mainly aim at fixed frequency bands, and the products are already produced, namely, the dynamic characteristics are determined. However, in actual working conditions, different track line conditions and different vehicle speed states can change the vibration condition of the track, and the products with fixed frequency bands can not meet the requirements under different working conditions in universality.
In view of the above, the present invention is particularly proposed.
Disclosure of Invention
The invention aims to provide a nonlinear steel rail damper and a steel rail damping system, which aim to solve the problems of environmental vibration and noise pollution caused by urban rail transit in the operation process in the background technology.
In order to achieve one of the above purposes, the invention provides the following technical scheme:
a nonlinear steel rail damper comprises an Euler beam, a vibration absorption mass block, a bracket, a rubber damper and a mounting plate;
the two ends of the Euler beam are supported by the bracket, the middle part of the Euler beam is fixed on the vibration absorption mass block, and the vibration absorption mass block is fixed on the rubber damper;
the support with the rubber damper is all fixed in on the mounting panel.
Preferably, the vibration absorbing mass block is a circular stainless steel block, a groove is formed in the middle of the circular stainless steel block, and the Euler beam is placed in the groove and clamped by the circular stainless steel block.
Preferably, the vibration absorbing mass is formed by stacking a plurality of round stainless steel blocks.
Preferably, the vibration absorber further comprises a shell, and the Euler beam, the vibration absorbing mass, the bracket, the rubber damper and the mounting plate are arranged in the shell.
Preferably, the both sides of mounting panel are provided with the recess corresponding position on the shell also is equipped with the recess slide, the mounting panel with the shell is connected through recess and recess slide.
Preferably, a dovetail groove is formed in the mounting plate, and the bracket is fixed in the dovetail groove.
Preferably, a plurality of positioning holes are formed in the dovetail groove, and the bracket can be fixed in different positioning holes.
Preferably, the upper end of the support is provided with a pressing mechanism, the two ends of the euler beam are pressed and fixed by the pressing mechanism, the pressing mechanism comprises a pressing block and a pressing plate, the pressing plate is located at the upper end of the support, and the pressing block is rotationally fixed on the pressing plate.
Preferably, the portable electronic device further comprises a cover, wherein the cover is mounted on one side of the housing, and the cover and the housing together form a closed space.
Still include the base, the base set up in the mounting panel lower extreme.
In order to achieve the second purpose, the invention provides the following technical scheme:
a rail damping system comprising a non-linear rail damper as hereinbefore described, the non-linear rail damper comprising an Euler beam, a seismic mass, a mount, a rubber damper, a mounting plate;
the two ends of the Euler beam are supported by the bracket, the middle part of the Euler beam is fixed on the vibration absorption mass block, and the vibration absorption mass block is fixed on the rubber damper;
the support with the rubber damper is all fixed in on the mounting panel.
Compared with the prior art, the nonlinear steel rail damper and the steel rail damping system provided by the invention have the beneficial effects that:
1. in the nonlinear steel rail damper and the steel rail damping system, the Euler beam is used as a nonlinear rigidity output element, the access length and the vibration absorption quality of the beam are adjusted, different vibration suppression frequencies can be adjusted, and compared with a common steel rail damper, the nonlinear steel rail damper has a wider vibration suppression frequency band, and the medium-high frequency vibration phenomenon of the steel rail is effectively improved.
2. In the nonlinear steel rail damper and the steel rail damping system, the sliding groove type design is adopted, the main body part of the damper can slide out integrally along with the mounting plate, the structure is simple, the replacement is easy, the working reliability is high, and the maintenance and the working state adjustment of the damper are convenient.
3. The nonlinear steel rail damper and the steel rail damping system provided by the invention can effectively suppress the ping-ping resonance peak value and effectively reduce the wave-grinding phenomenon of the steel rail.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a cross-sectional elevation view of a nonlinear rail damper.
FIG. 2 is a cross-sectional view of a right side view of the nonlinear rail damper.
FIG. 3 is a top view of a nonlinear rail damper.
Figure 4 is an isometric view of the interior of the nonlinear rail damper.
FIG. 5 is a schematic view of the connection of the absorber mass to the beam
FIG. 6 is a schematic view of the mounting plate being connected to the housing.
The schematic in the figure is as follows:
1-sealing cover, 2-bracket, 3-Euler beam, 4-vibration absorbing mass block, 5-shell, 6-pressing plate, 7-mounting plate, 8-rubber damper and 9-base.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
While the urban rail transit is rapidly developed in China, the problems of environmental vibration and noise pollution are caused in the operation process, the working and life quality of residents along the line is directly influenced, and the vibration noise problem and the environmental sound caused by the operation of the urban rail transit are increasingly concerned by society. Noise sources of trains include wheel-rail noise caused by the excitation of wheel-rail surfaces to each other, vibration noise of external structures caused by the transmission of rail vibrations through the track structure, and train traction noise, aerodynamic noise, etc. The wheel-track noise is a main noise source in the operating speed interval of the urban rail train.
To falling of wheel rail noise, have the track and the wheel that adopt novel damping structure, use elastic fastener, multiple modes such as rail of polishing, wherein the most extensive mode of adaptability is installation rail attenuator. However, the existing market products mainly aim at fixed frequency bands, and the products are already produced, namely, the dynamic characteristics are determined. However, in actual working conditions, under different track line conditions and different vehicle speed states, the vibration conditions of the track can be changed, and the products with fixed frequency bands can not meet the requirements under different working conditions in universality.
In order to solve the problems, the application provides a nonlinear steel rail damper and a steel rail damping system, which are used for solving the problems that the urban rail transit mainly causes environmental vibration and noise pollution in the operation process.
Hereinafter, the technical means disclosed in the present application will be described in further detail with reference to specific examples.
As shown in fig. 1 to 6, embodiments of the present specification provide a nonlinear steel rail damper, including: the vibration absorber comprises a sealing cover 1, a bracket 2, an Euler beam 3, a vibration absorbing mass block 4, a shell 5, a pressing plate 6, a mounting plate 7, a rubber damper 8 and a base 9.
Wherein, both ends of the Euler beam 3 are supported by the bracket 2, the middle part of the Euler beam 3 is fixed on the vibration absorption mass block 4, and the vibration absorption mass block 4 is fixed on the rubber damper 8; the bracket 2 and the rubber damper 8 are both fixed on the mounting plate 7. The vibration absorption mass block 4 is a circular stainless steel block, a groove is formed in the middle of the circular stainless steel block, and the Euler beam 3 is placed in the groove and clamped tightly by the circular stainless steel block. The vibration absorbing mass block 4 is formed by stacking a plurality of round stainless steel blocks. The Euler beam 3, the vibration absorption mass block 4, the support 2, the rubber damper 8 and the mounting plate 7 are all arranged in the shell 5. The both sides of mounting panel 7 are provided with the recess corresponding position also is equipped with the recess slide on the shell 7, mounting panel 7 with shell 5 is connected through recess and recess slide. The mounting plate 7 is provided with a dovetail groove, and the bracket 2 is fixed in the dovetail groove. A plurality of positioning holes are formed in the dovetail groove, and the support 2 can be fixed in different positioning holes. The upper end of the support 2 is provided with a pressing mechanism, the two ends of the Euler beam 3 are pressed and fixed through the pressing mechanism, the pressing mechanism comprises a pressing block and a pressing plate 6, the pressing plate 6 is located at the upper end of the support, and the pressing block is rotationally fixed on the pressing plate 6. The cover 1 is installed on one side of the housing 5, and the cover 1 and the housing 5 together form a closed space. The base 9 is arranged at the lower end of the mounting plate.
The Euler beam 3 is a metal sheet beam, is connected with the vibration absorption mass block 4, and two ends of the Euler beam are supported by the bracket 2; the Euler beam 3 can provide nonlinear rigidity, so that the system generates nonlinear characteristics, the defects of a linear damper are overcome, and the vibration suppression effect is improved.
In the embodiment of the invention, the Euler beam 3 is used as a nonlinear stiffness output element, the access length and the vibration absorption quality of the Euler beam 3 are adjusted, different vibration suppression frequencies can be adjusted, compared with a common steel rail damper, the Euler beam damper has a wider vibration suppression frequency band, and the medium-high frequency vibration phenomenon of the steel rail is effectively improved. In the actual working process, the actual size and material of the euler beam 3 can be specifically designed and selected according to the requirements.
In the embodiment of the invention, the vibration absorbing mass block 4 is composed of a plurality of circular stainless steel blocks, and a groove is arranged in the middle of each steel block, so that the euler beams 4 can be placed in the groove and clamped tightly. The number of the vibration absorber masses 4 can be adjusted according to the actual situation.
Furthermore, in the above embodiment, the absorber mass 4 is fixed to the central position of the euler beam 3 by clamping the two steel blocks, and the absorber mass 4 is fixed to the rubber damper 8 by screwing. Of course, as a person skilled in the art will appreciate, the way of fixing the vibration absorbing mass 4 to the rubber damper 8 is not limited to screw connection, and ways like bolt connection, snap connection, etc. are all alternative forms and are within the scope of protection of the present disclosure.
As shown in fig. 4, a pressing mechanism is arranged at the upper end of the bracket 2, the two ends of the euler beam 3 are pressed and fixed by the pressing mechanism, the pressing mechanism comprises a pressing block and a pressing plate 6, the pressing plate 6 is arranged at the upper end of the bracket 2, and the pressing block is rotatably fixed on the pressing plate 6. The Euler beam 3 penetrates through the groove on the support 2 and is pressed by the pressing block, so that the mounting condition that the two ends of the Euler beam are fixed can be realized. In addition, the shape and size of the pressing mechanism can be adjusted, and the connection mode with the bracket 2 can be various, such as a screw bolt connection, a rivet connection or a connection through a shaft and a bearing.
In the present embodiment, the rubber damper 8 is composed of rubber and metal frame, and is installed between the vibration absorbing mass and the installation plate, the rubber damper 8 helps to enhance the structural load-bearing rigidity, and the system damping can be increased by the rubber to dissipate the vibration energy.
In the embodiment, the bracket 2 is connected with the mounting plate 7 through screws, and the mounting position of the bracket 2 can be changed by a plurality of hole sites on the mounting plate 7, so that different access lengths of the Euler beam 3 can be realized, and various working conditions can be adapted; the upper end of the rubber damper 8 is connected below the vibration absorption mass 4, and the lower part is connected with the mounting plate 7 through screws, so that the effects of damping and linear rigidity support are provided;
in this embodiment, the groove on the side surface of the mounting plate 7 is connected with the housing 5 through a sliding groove, so that the mounting and dismounting are convenient, and the mounting condition can be designed according to different heights. The support 2 is connected with the mounting plate 7 through a dovetail groove, left-right translation can be achieved, and the height of the support 2 can be designed independently according to actual conditions. The width and depth of the opening of the bracket 2 can also be adjusted.
When the mounting plate 7 is vibrated, the euler beams 3 with both sides completely fixed provide a nonlinear rigidity, the vibration absorbing mass 4 moves, and the damping in the rubber damper 8 connected with the vibration absorbing mass dissipates vibration energy to realize the dynamic vibration absorption of the rail.
In addition, the material, the cross-sectional shape and the size of the housing 5 in the present embodiment can be adjusted according to actual conditions. The material, the cross-sectional shape and the size of the mounting plate 7 can be adjusted according to actual conditions. The access length of the euler beam 3 is necessarily symmetrical with respect to the centre of the mass, i.e. the length of the euler beam 3 between the two supports 2.
In the invention, under the working state of the nonlinear steel rail damper, the vibration of the steel rail is transmitted to the vibration absorption mass block 4 through the base 9 and the mounting plate 7, the nonlinear rigidity is used for realizing the self-adaptive broadband resonance, and the vibration energy is consumed through the damping element.
In addition, in other embodiments of the present invention, a rail damping system is provided, the rail damping system including a non-linear rail damper; wherein nonlinear rail attenuator includes: the vibration absorber comprises a sealing cover 1, a bracket 2, an Euler beam 3, a vibration absorbing mass block 4, a shell 5, a pressing plate 6, a mounting plate 7, a rubber damper 8 and a base 9.
Wherein, both ends of the Euler beam 3 are supported by the bracket 2, the middle part of the Euler beam 3 is fixed on the vibration absorption mass block 4, and the vibration absorption mass block 4 is fixed on the rubber damper 8; the support 2 and the rubber damper 8 are fixed on the mounting plate 7. The vibration absorption mass block 4 is a circular stainless steel block, a groove is formed in the middle of the circular stainless steel block, and the Euler beam 3 is placed in the groove and clamped by the circular stainless steel block. The vibration absorbing mass block 4 is formed by stacking a plurality of round stainless steel blocks. The Euler beam 3, the vibration absorbing mass block 4, the bracket 2, the rubber damper 8 and the mounting plate 7 are all arranged in the shell 5. The both sides of mounting panel 7 are provided with the recess corresponding position also is equipped with the recess slide on the shell 7, mounting panel 7 with shell 5 is connected through recess and recess slide. The mounting plate 7 is provided with a dovetail groove, and the bracket 2 is fixed in the dovetail groove. A plurality of positioning holes are formed in the dovetail groove, and the support 2 can be fixed in different positioning holes. The upper end of the support 2 is provided with a pressing mechanism, the two ends of the Euler beam 3 are pressed and fixed through the pressing mechanism, the pressing mechanism comprises a pressing block and a pressing plate 6, the pressing plate 6 is located at the upper end of the support, and the pressing block is rotationally fixed on the pressing plate 6. The cover 1 is installed on one side of the housing 5, and the cover 1 and the housing 5 together form a closed space. The base 9 is arranged at the lower end of the mounting plate.
The Euler beam 3 is a metal sheet beam, is connected with the vibration absorption mass block 4, and two ends of the Euler beam are supported by the bracket 2; the Euler beam 3 can provide nonlinear rigidity, so that the system generates nonlinear characteristics, the defects of a linear damper are overcome, and the vibration suppression effect is improved.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or the orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
Claims (10)
1. A nonlinear steel rail damper is characterized by comprising an Euler beam, a vibration absorption mass block, a bracket, a rubber damper and a mounting plate;
the two ends of the Euler beam are supported by the bracket, the middle part of the Euler beam is fixed on the vibration absorption mass block, and the vibration absorption mass block is fixed on the rubber damper;
the support with the rubber damper is all fixed in on the mounting panel.
2. The nonlinear rail damper in accordance with claim 1, wherein the absorber mass is a circular stainless steel block having a groove in the middle, and the euler beam is placed in the groove and clamped by the circular stainless steel block.
3. The nonlinear steel rail damper as in claim 2, wherein the vibration absorbing mass is a stack of a plurality of round stainless steel blocks.
4. A nonlinear rail damper in accordance with claim 3 further comprising a housing, wherein the euler beam, the absorber mass, the bracket, the rubber damper, and the mounting plate are disposed within the housing.
5. The damper according to claim 4, wherein the mounting plate has grooves on both sides thereof, and grooves are provided at corresponding positions on the housing, and the mounting plate is connected to the housing through the grooves and grooves.
6. A damper according to claim 5 in which a dovetail slot is provided in the mounting plate and the mount is secured in the dovetail slot.
7. A damper according to claim 6 in which a plurality of locating holes are provided in the dovetail slot and the brackets can be secured in different locating holes.
8. The damper according to claim 7, wherein a pressing mechanism is provided at an upper end of the support, both ends of the euler beam are pressed and fixed by the pressing mechanism, the pressing mechanism includes a pressing block and a pressing plate, the pressing plate is provided at the upper end of the support, and the pressing block is rotatably fixed to the pressing plate.
9. The damper according to claim 8, further comprising a cover and a base, wherein the cover is mounted on one side of the housing, and the cover and the housing together form a closed space;
the base is arranged at the lower end of the mounting plate.
10. A rail damping system comprising a non-linear rail damper as claimed in any one of claims 1 to 9.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111291604 | 2021-11-03 | ||
| CN2021112916042 | 2021-11-03 |
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| CN114561836A true CN114561836A (en) | 2022-05-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210268299.3A Pending CN114561836A (en) | 2021-11-03 | 2022-03-18 | Nonlinear steel rail damper and steel rail damping system |
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