阅读说明：本技术 一种基于粒子阻尼的轨道线路减振扣件 (Track circuit vibration attenuation fastener based on particle damping ) 是由 肖望强 �林昌明 胡敬一 吉利 于 2019-10-29 设计创作，主要内容包括：本发明提供了一种基于粒子阻尼的轨道线路减振扣件,涉及轨道减振技术领域,包括：第一阻尼器和压紧组件,所述第一阻尼器贴合于钢轨腰部,所述压紧组件可拆卸连接于轨枕,并抵接于所述第一阻尼器,其中,所述第一阻尼器包括由单腔室或多腔室组成的第一阻尼外壳、内置于所述第一阻尼外壳的阻尼粒子以及贴合于所述第一阻尼外壳外表面的弹性隔振层。本发明便于拆装,具有优异的隔振效果和结构稳定性。(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.)

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.

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.