Particle damping type fastener elastic strip

Abstract

The utility model discloses a particle damping type fastener elastic strip which comprises an elastic strip body, a plurality of cavities are formed in the elastic strip body, a plurality of first particles and second particles are filled in the cavities, and the particle size of the first particles is larger than that of the second particles. In any cavity, the total filling rate of the first particles and the second particles is 60%-80%. The utility model aims to provide the particle damping type fastener elastic strip, so as to solve the problems of damage and safety caused by resonance of the elastic strip in the prior art, and achieve the purposes of improving the self-damping of the elastic strip, reducing the damage of the elastic strip caused by resonance and improving the running safety of a high-speed train.

Description

Technical Field

[0001] This utility model relates to the field of rail transit technology, specifically to a particle damping type fastener spring bar. Background Technology

[0002] Railway fastening systems are commonly used structures for fixing rails. The elastic clip, a key component of the fastener, provides sufficient clamping force to ensure a reliable connection between the rail and the rail foundation over a long period, thus guaranteeing the safe operation of trains. Existing research shows that as train operating mileage increases, polygonal wear appears in the circumferential direction of the wheels, and wavy wear also appears on the rail surface in some sections. Polygonal wheel wear and rail corrugation are special types of wheel-rail damage, which intensify the interaction between the vehicle and the track system, leading to increased vertical forces between the wheel and rail. This generates high-frequency vibration disturbances between the wheel and rail. When the vibration frequency approaches the natural frequency of the elastic clip, it can cause resonance, severely damaging the clip, shortening its service life, and posing a threat to the safety of high-speed trains. Utility Model Content

[0003] The purpose of this utility model is to provide a particle-damped fastener spring bar to solve the damage and safety problems caused by spring bar resonance in the prior art, and to achieve the purpose of improving the damping of the spring bar itself, reducing the damage to the spring bar caused by resonance, and improving the driving safety of high-speed trains.

[0004] This utility model is achieved through the following technical solution:

[0005] A particle-damped fastener spring bar includes a spring bar body and a plurality of cavities disposed within the spring bar body. The cavities are filled with a plurality of first particles and second particles, wherein the particle size of the first particles is larger than that of the second particles; and the total filling rate of the first particles and the second particles in any of the cavities is 60% to 80%.

[0006] In response to the problem in existing technologies where elastic clips suffer severe damage due to resonance, resulting in shortened service life and posing a safety hazard to high-speed trains, the inventors of this application discovered during their research that one of the important reasons for elastic clip resonance damage is that the clip, being a metal component, has very low damping, making it susceptible to resonance caused by high-frequency vibrations between the wheel and rail. To overcome this problem, this application incorporates several cavities within the elastic clip body, and fills each cavity with several first and second particles, such that the particle size of the first particles is larger than that of the second particles, with a total filling rate of 60% to 80%. Those skilled in the art should understand that the total filling rate described in this application refers to the sum of the filling rates of the first and second particles in any cavity; this total filling rate can also be equivalent to the total volume of the first and second particles, representing the volume ratio within the corresponding cavity.

[0007] This solution fills the cavity of the spring clip body with first and second particles of different sizes. After the first particles are filled, gaps exist between the particles, and the second particles enter these gaps, thereby significantly increasing the mutual friction between the particles and improving the damping of the spring clip itself. In addition, the inventors of this application also discovered during the research process that, in addition to the mutual friction between particles, the mutual collision between particles also has a very strong energy dissipation effect. Therefore, this application explicitly limits the total filling rate of the first and second particles to 60% to 80%, ensuring that when the spring clip is subjected to high-frequency vibration disturbance, the internal particles can collide with each other, thereby more significantly dissipating the energy transferred to the spring clip by resonance, significantly reducing the damage to the spring clip caused by resonance, and thus improving the driving safety of high-speed trains.

[0008] Furthermore, the particle size of the first particle is 0.8–1.2 mm.

[0009] During their research, the inventors discovered that, given a fixed filling rate: if the particle size is too small, although the number of particles is relatively large, the collision intensity between particles is weak, resulting in relatively low energy dissipation performance; conversely, if the particle size is too large, although the collision intensity between particles is relatively strong, the number of particles is small, resulting in less frictional energy dissipation, and therefore, relatively low energy dissipation performance. Therefore, this design limits the particle size of the first particle to 0.8–1.2 mm. Within this range, both the number of particles and the degree of collision can reach a relatively moderate state, which is beneficial for improving energy dissipation performance.

[0010] Furthermore, the particle size of the second particle is less than or equal to 0.4 mm. In this scheme, the first particle serves as the main energy-consuming unit, and the second particle serves as a supplementary energy-consuming unit. The second particle mainly consumes energy through friction with the first particle. Therefore, limiting its particle size to less than or equal to 0.4 mm is more conducive to increasing the friction area and thus optimizing the energy consumption effect.

[0011] Furthermore, the density of the first particle and / or the second particle is greater than 10 g / cm³. 3 During their research, the inventors discovered that the higher the particle density filling the cavity, the greater the frictional energy loss. Therefore, this solution uses high-density first and / or second particles to accelerate energy dissipation and further improve damping performance. Of course, this solution does not specifically limit the material of the first and / or second particles; existing technologies generally require a density greater than 10 g / cm³. 3 All mature materials are applicable.

[0012] Furthermore, the first particle and / or the second particle are lead particles; this solution takes into account both density and economy, and preferably uses metallic lead as the material for the first particle and / or the second particle.

[0013] Preferably, in any of the cavities, the total filling rate of the first and second particles is 70%; this filling rate provides the best damping performance when using the same material and particle size.

[0014] Furthermore, the cavity is strip-shaped and extends along the direction of the spring clip body. Existing technologies all have multiple spring clips with different structures, and the cavity in this application can be positioned at any location on the spring clip body. Therefore, this solution limits the cavity to a strip shape, and the extension direction of the strip-shaped cavity must be consistent with the direction of the region on the spring clip body, thereby ensuring the adaptability of the cavity to the spring clip body and simultaneously increasing the cavity volume.

[0015] Furthermore, the cavity has a circular cross-section and an aspect ratio of 10 to 15. A cavity with a circular cross-section and an overall strip shape can be considered equivalent to a cylindrical structure. This design limits its aspect ratio to 10 to 15, which helps to meet the strength requirements of the elastic bar itself while ensuring damping performance.

[0016] Furthermore, the inner wall of at least one side of the cavity is wavy, which also helps to improve the damping performance of the elastic bar.

[0017] The cartridge body in this application can be an existing cartridge configuration such as a W-type cartridge, an E-type cartridge, or a rapid-fire cartridge.

[0018] Compared with the prior art, this utility model has the following advantages and beneficial effects:

[0019] 1. The present invention relates to a particle-damped fastener spring bar, wherein the cavity of the spring bar body is filled with a first particle and a second particle with different particle sizes. After the first particle is filled, there are gaps between the particles, and the second particle enters the aforementioned gaps, thereby significantly increasing the mutual friction between the particles, improving the damping of the spring bar itself, and reducing the resonance response amplitude.

[0020] 2. This utility model provides a particle-damped fastener spring bar. When the spring bar is subjected to high-frequency vibration disturbance, the internal particles can collide with each other, thereby dissipating the energy transmitted to the spring bar by resonance, significantly reducing the damage to the spring bar caused by resonance, and helping to improve the driving safety of high-speed trains. Attached Figure Description

[0021] The accompanying drawings, which are included to provide a further understanding of the embodiments of the present invention and form part of this application, do not constitute a limitation thereof. In the drawings:

[0022] Figure 1 This is a schematic diagram of a specific embodiment of the present invention where the spring bar body is a W-shaped spring bar;

[0023] Figure 2This is a schematic diagram of a specific embodiment of the present invention where the spring bar body is an E-type spring bar;

[0024] Figure 3 This is a cross-sectional view of a cavity in a specific embodiment of the present utility model;

[0025] Figure 4 This is a cross-sectional view of another cavity in a specific embodiment of this utility model.

[0026] The attached diagram shows the markings and corresponding component names:

[0027] 1-The main body of the spring bar, 2-The cavity. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings. The illustrative embodiments and descriptions of this utility model are only used to explain this utility model and are not intended to limit this utility model.

[0029] Example 1:

[0030] A particle-damped fastener spring bar includes a spring bar body 1 and several cavities 2 formed within the spring bar body. The cavities are filled with several first particles and second particles. In this embodiment, both the first and second particles are spherical, and the particle size of the first particle is larger than that of the second particle.

[0031] In any of the cavities, the total filling rate of the first and second particles is 60% to 80%, preferably 70%.

[0032] In this embodiment, the particle size of the first particle is 0.8 to 1.2 mm; the particle size of the second particle is less than or equal to 0.4 mm.

[0033] In this embodiment, the first particle and the second particle are made of the same material, and both have a density greater than 10 g / cm³. 3 Lead particles are preferred.

[0034] This embodiment can be used for configurations such as W-type spring clips, E-type spring clips, or rapid-fire spring clips. When the spring clip body 1 is a W-type spring clip, the arrangement of the cavity 2 can be referred to... Figure 1 That is, cavities 2 are provided in the side and middle limbs of the W-shaped projectile; when the projectile body 1 is an E-shaped projectile, the arrangement of cavities 2 can be referred to Figure 2 That is, a cavity 2 is set in the two arc segments of the E-type elastic bar.

[0035] Example 2:

[0036] A particle-damped fastener spring bar, based on Embodiment 1, extends along the direction of the spring bar body at any given cavity.

[0037] In addition, the cavity can be shaped like... Figure 3 The strip shape shown can also be presented as... Figure 4 The cavity is wavy, as shown. Regardless of its structure, the aspect ratio of the cavity is maintained within the range of 10:1 to 15:1 in this embodiment.

[0038] Example 3:

[0039] A granular damping fastener spring bar, based on embodiment 1 or 2, wherein the masses of the second particle and the first particle satisfy the following relationship within either of the cavities:

[0040]

[0041] In the formula: M1 is the total mass of the first particle in the cavity; M2 is the total mass of the second particle in the cavity; ρ is the density of the first particle and the second particle; R1 is the average particle size of the first particle in the cavity; R2 is the average particle size of the second particle in the cavity.

[0042] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0043] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above description is only a specific embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A granular damping fastener tab, comprising a tab body, a plurality of cavities disposed within the tab body, wherein, The cavities are filled with a plurality of first particles and second particles, the first particles having a particle size greater than the particle size of the second particles; and the total filling rate of the first particles and the second particles in any of the cavities is 60% to 80%.

2. A granular-damping fastener tab according to claim 1, wherein The particle size of the first particles is 0.8 to 1.2 mm.

3. The granular-damping fastener tab of claim 1, wherein, The particle size of the second particles is less than or equal to 0.4 mm.

4. The granular-damping fastener tab of claim 1, wherein the density of the first particles and / or the second particles is greater than 10 g / cm3 3 .

5. The granular-damping fastener tab of claim 1, wherein The first particles and / or the second particles are lead particles.

6. The granular-damping fastener tab of claim 1, wherein, The total filling rate of the first particles and the second particles in any of the cavities is 70%.

7. The granular-damping fastener tab of claim 1, wherein The cavities are in the shape of strips, and the cavities extend along the direction of the elastic strip body.

8. A granular damped fastener tab according to claim 7, wherein, The cross section of the cavities is circular, and the length-diameter ratio of the cavities is 10 to 15.

9. The granular-damping fastener tab of claim 7, wherein, The inner wall of the cavities is wavy.

10. The granular damping fastener tab according to any one of claims 1 to 9, wherein The elastic strip body is a W-shaped elastic strip, an E-shaped elastic strip or a quick elastic strip.

Images