CN110761131A - Track circuit vibration attenuation fastener based on particle damping - Google Patents
Track circuit vibration attenuation fastener based on particle damping Download PDFInfo
- Publication number
- CN110761131A CN110761131A CN201911037305.9A CN201911037305A CN110761131A CN 110761131 A CN110761131 A CN 110761131A CN 201911037305 A CN201911037305 A CN 201911037305A CN 110761131 A CN110761131 A CN 110761131A
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- damping
- damper
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- particles
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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
- E01B9/00—Fastening rails on sleepers, or the like
- E01B9/60—Rail fastenings making use of clamps or braces supporting the side of the rail
-
- 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
-
- 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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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Vibration Prevention Devices (AREA)
Abstract
The invention provides a rail line vibration damping fastener based on particle damping, which relates to the technical field of rail vibration damping and comprises the following components: the first damper is attached to the waist of a steel rail, the compressing assembly is detachably connected to a sleeper and abuts against the first damper, wherein the first damper comprises a first damping shell consisting of a single cavity or multiple cavities, damping particles arranged in the first damping shell and an elastic vibration isolation layer attached to the outer surface of the first damping shell. The invention is convenient for disassembly and assembly, and has excellent vibration isolation effect and structural stability.
Description
Technical Field
The invention relates to the technical field of rail vibration reduction, in particular to a rail line vibration reduction fastener based on particle damping.
Background
At present, rail transit becomes the main force army of public transport and logistics transportation and is the life line of the country, but the train has a larger vibration problem in the advancing process, the service life of the rail is reduced while noise is generated, the vibration is larger when the train is faster, and therefore the vibration also restricts the speed of the train to be increased.
The vibration isolation scheme of the lower track line mainly comprises changing the track line or a sleeper structure, using a fastener for vibration reduction and using a rubber pad for vibration reduction, and the vibration of the track line can be reduced to a certain degree, wherein the vibration reduction effect of the fastener is particularly outstanding. However, in order to improve the vibration isolation effect, fasteners, rubber vibration damping pads and the like develop towards low static stiffness, so that the integral natural frequency of the track is reduced, and the vibration isolation effect in a low frequency range (particularly near the natural frequency) is not ideal.
Disclosure of Invention
The invention provides a track circuit vibration damping fastener based on particle damping, and aims to solve the problem that the vibration damping effect of the conventional vibration damping fastener is not ideal.
The invention is realized by the following steps:
the embodiment of the invention provides a track circuit vibration attenuation fastener based on particle damping, which comprises: the first damper is attached to the waist of a steel rail, the compressing assembly is detachably connected to a sleeper and abuts against the first damper, wherein the first damper comprises a first damping shell consisting of a single cavity or multiple cavities, damping particles arranged in the first damping shell and an elastic vibration isolation layer attached to the outer surface of the first damping shell.
Further, in a preferred embodiment of the present invention, the elastic vibration isolation layer is made of rubber, and the hardness of the rubber is 60HBR-70 HBR.
Further, in a preferred embodiment of the present invention, the compressing assembly includes a second damper and a third damper, the second damper and the third damper include a second damping housing and damping particles embedded in the second damping housing, the second damper is configured as a trapezoidal member, two waists of the trapezoidal member respectively abut against the first damper and the sleeper, one end of the third damper abuts against the trapezoidal member, and the other end of the third damper is connected to the sleeper through a connecting member.
Further, in a preferred embodiment of the present invention, a flexible pad is disposed between the third damper and the sleeper, a hole is formed in a middle portion of the flexible pad, and the connecting member penetrates through the hole and is fixed to the sleeper in a matching manner.
Further, in the preferred embodiment of the present invention, the flexible pad is a cuboid with a side length of 10-30mm, a hardness of 50HBR-60HBR, and a diameter of the opening of 15-20 mm.
Further, in a preferred embodiment of the present invention, the first damping housing and the second damping housing have a wall thickness of 0.01-30mm, and are made of a binary or multi-element alloy selected from one or more of magnesium alloy, aluminum alloy, titanium alloy, iron alloy, copper alloy, nickel alloy, lead alloy, manganese alloy, cobalt alloy, and tungsten alloy.
Further, in a preferred embodiment of the present invention, the damping particles are made of metal, nonmetal or polymer composite, and the damping particles are one or more of spheres with a diameter of 0.001-30mm, ellipsoids with a length of 0.001-30mm in major and minor axes, and regular or irregular polyhedrons with a side length of 0.001-30 mm.
Further, in a preferred embodiment of the present invention, the filling rate of the damping particles is 10% to 100%, and the surface configuration thereof is: surface friction factor of 0.01-0.99, surface recovery coefficient of 0.01-1, and density of the particles of 0.1-30g/cm3。
Further, in the preferred embodiment of the present invention, the wall thickness of the first damping housing is 5-7mm of metal material, and metal damping particles with the diameter of 1-7mm are filled in the first damping housing;
the wall thickness of the second damping shell is 1-5mm, and nonmetal damping particles with the diameter of 3-5mm are filled in the second damping shell.
The invention has the beneficial effects that:
(1) when the particle damping-based track line vibration damping fastener is used, the first damper is arranged at the waist of the steel rail, and when the steel rail is forced to vibrate, damping particles in the first damper and the damping particles and the first damping shell collide with each other and rub to consume vibration energy, so that the vibration isolation effect is enhanced. Meanwhile, the elastic vibration isolation layer on the outer surface of the first damping shell plays a role in composite vibration isolation, and the vibration isolation rate is improved.
(2) The compression assembly is detachably connected with the sleeper, so that the disassembly, the assembly and the replacement are convenient; through compress tightly the subassembly butt in first attenuator can dismantle with the sleeper and be connected, the "worker" type structure of cooperation rail waist will first attenuator lock has promoted the structural stability of damping fastener in the rail waist.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required 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 schematic view of a structure of a particle damping-based track line vibration damping fastener and a steel rail provided by an embodiment of the invention;
FIG. 2 is a schematic diagram of a track circuit without a particle damping based damping fastener provided by an embodiment of the present invention;
fig. 3 is a schematic sectional view of the first damper according to the embodiment of the present invention.
Icon: 1-a first damper; 11-a first damping housing; 12-damping particles; 13-an elastic vibration isolation layer; 2-a compression assembly; 21-a second damper; 22-a third damper; 23-a connector; 24-a flexible mat; 3-the waist of the steel rail; 4-a sleeper; 5-upper elastic backing plate; 6-a metal backing plate; 7-lower elastic backing plate.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, 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 obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the equipment or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
Example 1
Referring to fig. 1 to 3, an embodiment of the present invention provides a particle damping-based track line vibration damping fastener, including: the damping device comprises a first damper 1 and a compressing assembly 2, wherein the first damper 1 is attached to the waist portion 3 of a steel rail, the compressing assembly 2 is detachably connected to a sleeper 4 and abuts against the first damper 1, the first damper 1 comprises a first damping shell 11 formed by a single chamber or multiple chambers, damping particles 12 arranged in the first damping shell 11 and an elastic vibration isolation layer 13 attached to the outer surface of the first damping shell 11.
Referring to fig. 2, when the vibration-damping fastener provided by the present invention is not installed on a track circuit, vibration-isolating structures such as an upper elastic pad 5, a metal pad 6, and a lower elastic pad 7 are installed on a steel rail, so that the vibration of the circuit is primarily reduced. On the basis of the vibration isolation arrangement, when the track line vibration damping fastener provided by the invention is used, the first damper 1 is arranged on the waist part 3 of the steel rail, and when the steel rail is forced to vibrate, the damping particles 12 in the first damper 1 and the damping particles 12 and the first damping shell 11 collide with each other and consume vibration energy through friction, so that the vibration isolation effect is enhanced. Meanwhile, the elastic vibration isolation layer 13 on the outer surface of the first damping shell 11 plays a role in compound vibration isolation, and the vibration isolation rate is improved. The detachable connection of the compressing assembly 2 and the sleeper 4 facilitates the disassembly, assembly and replacement; through compress tightly 2 butt in first attenuator 1 can dismantle with sleeper 4 and be connected, the "worker" type structure of cooperation rail waist 3 will first attenuator 1 lock in rail waist 3 makes it difficult pine take off and fracture, has promoted the structural stability of damping fastener.
Furthermore, the elastic vibration isolation layer 13 is made of rubber, can be directly attached to the surface of the vibration reduction and isolation damper in a vulcanization mode, and has the hardness of 60HBR-70 HBR. It is understood that the elastic vibration isolation layer 13 may also be selected from non-metallic materials with lower rigidity, such as felt, fiberglass, polyurethane, etc., and the present invention is not particularly limited.
Further, referring to fig. 2, the pressing assembly 2 has a split structure, and is more convenient to disassemble, assemble and replace, and includes a second damper 21 and a third damper 22, which are abutted against each other, and the second damper 21 and the third damper 22 include a second damping housing and damping particles 12 embedded in the second damping housing. The pressing component 2 is set as a damper, so that the pressing force is provided, meanwhile, the auxiliary vibration isolation effect is achieved, and the vibration isolation efficiency is higher. The second damper 21 is a trapezoidal member, two waists of the trapezoidal member abut against the first damper 1 and the sleeper 4 respectively, one end of the third damper 22 abuts against the trapezoidal member, and the other end of the third damper is connected with the sleeper 4 through a connecting member 23. Preferably, the bottom angle of the trapezoid is 30 to 60 degrees, the third damper 22 abuts against the lower bottom surface of the trapezoid, and the shape and size of the third damper 22 can be adaptively set according to the installation environment.
Further, a flexible pad 24 is arranged between the third damper 22 and the sleeper 4, a hole is formed in the middle of the flexible pad 24, and the connecting piece 23 penetrates through the hole to be matched and fixed with the sleeper 4. Preferably, the flexible pad 24 is a cuboid with a side length of 10-30mm, the hardness of the cuboid is 50HBR-60HBR, which is slightly lower than that of the elastic vibration isolation layer 13, and the diameter of the opening is 15-20 mm. The flexible pad 24 performs composite vibration damping by adding energy dissipation elements and changing the overall rigidity of the fastener on the basis of the conventional fastener vibration damping technology, and further improves the vibration damping effect of the system without changing the existing vibration damping system. Preferably, the connecting member 23 is detachably fastened by a screw coupling, a key coupling, a pin coupling, a rivet coupling, or the like.
Further, the wall thickness of the first damping housing 11 and the second damping housing is 0.01-30mm, and the material is selected from binary or multi-element alloy formed by combining one or more of magnesium alloy, aluminum alloy, titanium alloy, iron alloy, copper alloy, nickel alloy, lead alloy, manganese alloy, cobalt alloy or tungsten alloy. Preferably, the material is square steel, the square steel has good integral rigidity, good material plasticity and toughness, can have large deformation, can well bear dynamic load and has strong deformation resistance, can be used for building large-span, ultrahigh and ultra-heavy buildings, has good homogeneity and isotropy, and best meets the basic assumption of general engineering mechanics.
Further, the damping particles 12 are made of metal, nonmetal or polymer composite materials, and the damping particles 12 are one or more of spheres with the diameter of 0.001-30mm, ellipsoids with the length of the major axis and the minor axis of 0.001-30mm, and regular or irregular polyhedrons with the side length of 0.001-30 mm. Preferably, the damping particles 12 are metal, and more preferably, the damping particles 12 are alloy materials, such as copper-zinc-aluminum, iron-chromium-molybdenum, and manganese-copper alloys, having wide temperature and frequency application ranges. Preferably, the damping particles 12 are spheres having a diameter of 1-10 mm. The sphere structure has larger freedom of movement, the collision probability among the damping particles 12 is high, and therefore damping is increased, and the vibration resistance is better.
Further, the filling rate of the damping particles 12 is 10% -100%, and the surface configuration thereof is as follows: surface friction factor of 0.01-0.99, surface recovery coefficient of 0.01-1, and density of the particles of 0.1-30g/cm3. Preferably, the filling rate is 50-100%, and more preferably, the damping effect is the best when the filling rate is 70-98%. At this time, the damping particles 12 have a large density and a large collision impact force, and a certain movement space ensures the space between the damping particles 12, and between the damping particles 12 andsufficient collision and friction between the first damping enclosures 11 to convert the system kinetic energy into heat energy for dissipation. Preferably, the surface friction factor is 0.5-0.99, the surface recovery coefficient is 0.5-1, and the density of the damping particles 12 is 10-30g/cm3。
Furthermore, the wall thickness of the first damping shell 11 is 5-7mm, and metal damping particles 12 with the diameter of 1-7mm are filled in the first damping shell; the wall thickness of the second damping shell is 1-5mm, and nonmetal damping particles 12 with the diameter of 3-5mm are filled in the second damping shell. Different vibration corresponding frequencies are arranged at different positions on the track line away from the center of the steel rail, metal damping particles are filled in the first damper 11 at the waist part 3 of the steel rail, and nonmetal damping particles are filled in the dampers at other positions so as to match different damping requirements, so that the vibration damping device is adaptive to the vibration response frequencies of different bearing points of the track, and the vibration damping efficiency is higher.
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.
Claims (9)
1. A track circuit damping fastener based on particle damping is characterized by comprising: first attenuator (1) and compress tightly subassembly (2), first attenuator (1) is laminated in rail waist (3), compress tightly subassembly (2) can dismantle and connect in sleeper (4), and the butt in first attenuator (1), wherein, first attenuator (1) include by single chamber or the first damping shell (11) that the multicavity chamber constitutes, place in damping particle (12) of first damping shell (11) and laminate in elastic vibration isolation layer (13) of first damping shell (11) surface.
2. The particle damping based track line vibration damping fastener according to claim 1, wherein the elastic vibration isolation layer (13) is rubber with a hardness of 60-70 HBR.
3. The particle damping based track line vibration damping fastener according to claim 1, wherein the compression assembly (2) comprises a second damper (21) and a third damper (22), the second damper (21) and the third damper (22) comprise a second damping shell and damping particles arranged in the second damping shell, the second damper (21) is arranged into a trapezoid, two waist parts of the trapezoid abut against the first damper (1) and a sleeper (4) respectively, one end of the third damper (22) abuts against the trapezoid, and the other end of the third damper is connected with the sleeper (4) through a connecting piece (23).
4. The rail line vibration damping fastener based on particle damping as claimed in claim 3, wherein a flexible pad (24) is arranged between the third damper (22) and the sleeper (4), a hole is formed in the middle of the flexible pad (24), and the connecting piece (23) penetrates through the hole and is matched and fixed with the sleeper (4).
5. The particle damping based track line vibration damping fastener according to claim 4, wherein the flexible pad (24) is a cuboid with 10-30mm side length, hardness of 50HBR-60HBR, and diameter of the opening is 15-20 mm.
6. The particle damping-based track line vibration damping fastener according to claim 3, wherein the wall thickness of the first damping housing (11) and the second damping housing is 0.01-30mm, and the material is selected from binary or multi-element alloy formed by combining one or more of magnesium alloy, aluminum alloy, titanium alloy, iron alloy, copper alloy, nickel alloy, lead alloy, manganese alloy, cobalt alloy or tungsten alloy.
7. The orbital line vibration damping fastener based on particle damping as set forth in claim 1, wherein the damping particles (12) are metal, nonmetal or polymer composite, and the damping particles (12) are one or more of spheres with a diameter of 0.001-30mm, ellipsoids with a length of major and minor axes of 0.001-30mm, regular or irregular polyhedrons with a side length of 0.001-30 mm.
8. The particle damping based track line vibration damping fastener according to claim 1, wherein the filling rate of the damping particles (12) is 10% -100%, and the surface thereof is configured as: surface friction factor of 0.01-0.99, surface recovery coefficient of 0.01-1, and density of the particles of 0.1-30g/cm3。
9. The particle damping based track line vibration damping fastener according to claim 3, wherein the wall thickness of the first damping housing (11) is 5-7mm of metal material, and metal damping particles with the diameter of 1-7mm are filled in the metal material;
the wall thickness of the second damping shell is 1-5mm, and nonmetal damping particles with the diameter of 3-5mm are filled in the second damping shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911037305.9A CN110761131A (en) | 2019-10-29 | 2019-10-29 | Track circuit vibration attenuation fastener based on particle damping |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911037305.9A CN110761131A (en) | 2019-10-29 | 2019-10-29 | Track circuit vibration attenuation fastener based on particle damping |
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| Publication Number | Publication Date |
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| CN110761131A true CN110761131A (en) | 2020-02-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911037305.9A Pending CN110761131A (en) | 2019-10-29 | 2019-10-29 | Track circuit vibration attenuation fastener based on particle damping |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111749056A (en) * | 2020-06-18 | 2020-10-09 | 中铁工程设计咨询集团有限公司 | Comprehensive damping vibration-damping noise-reducing device for mass-distributed steel rail |
-
2019
- 2019-10-29 CN CN201911037305.9A patent/CN110761131A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111749056A (en) * | 2020-06-18 | 2020-10-09 | 中铁工程设计咨询集团有限公司 | Comprehensive damping vibration-damping noise-reducing device for mass-distributed steel rail |
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