CN111576098A - Novel damping cushion layer applied to CRTS III plate type ballastless track - Google Patents

Abstract

The invention discloses a novel damping cushion layer applied to a CRTS III plate type ballastless track, which comprises an ethylene propylene diene monomer continuous material on the outer surface and a metal rubber damping block which is embedded in the damping cushion layer and consists of a plurality of small triangular structures made of single-phase austenite structure stainless steel wires with curled spiral cross sections. Compared with the conventional common rubber material cushion layer which is only applied, the novel damping cushion layer applied to the CRTS III plate-type ballastless track has the advantages of being excellent in damping effect, long in service life and the like, and meanwhile, the designed novel damping cushion layer is simple in structure, easy to process and produce, strong in tensile resistance, firm, durable, low in cost and wide in application prospect.

Description

Novel damping cushion layer applied to CRTS III plate type ballastless track

Technical Field

The invention belongs to the field of vibration reduction of high-speed railways, and particularly relates to a structure of a novel vibration reduction cushion layer.

Background

With the rapid development of high-speed railways in China, vibration problems caused by the development of railways draw attention in all aspects, and if the vibration problems caused by the development of railways are not controlled, the vibration problems are likely to become factors for restricting the development of railways in China. In the construction of high-speed railways in China, ballastless track structures are adopted mostly, so that the active development of research on the vibration damping performance of the ballastless tracks has important practical significance. On the basis of digesting and absorbing foreign ballastless track technologies, China develops a CRTS III slab ballastless track with independent intellectual property rights through independent innovation, and meanwhile, in order to better popularize the CRTS III slab ballastless track with the independent intellectual property rights, China track designers successfully develop a novel damping CRTS III slab ballastless track through continuous efforts, common rubber materials such as polyurethane, chloroprene rubber and the like are generally used for a damping cushion layer in the existing damping CRTS III slab ballastless track structure, but the rubber materials have the nonlinear characteristics of the materials when generating fatigue effect under the influence of long-term external environment such as temperature change and the influence of amplitude and frequency of train load on the upper part, so that the common rubber materials have the problems of easy aging, short service life and the like under the influence of the effects, in order to solve the problems of the rubber material for the CRTS III plate-type ballastless track structure, the novel damping cushion layer applied to the CRTS III plate-type ballastless track is provided, and compared with a common rubber material, the metal rubber material is well improved and optimized in the aspects of the problems, such as the service life and the aging problem, and the nonlinear characteristics of the temperature change, amplitude change and frequency change effects.

Disclosure of Invention

The invention aims to provide a novel vibration damping cushion layer applied to a CRTS III type plate ballastless track, which has the advantages of ageing resistance, long service life and good vibration damping effect, can effectively convert vibration energy transmitted from an upper track structure into mechanical energy and heat energy and quickly diffuse the mechanical energy and the heat energy out, and further reduces the high-frequency noise radiated by a wheel track and the vibration energy transmitted from a track plate structure to a lower track structure.

The technical scheme of the invention is as follows: the invention provides a novel damping cushion layer applied to a CRTS III plate type ballastless track, which comprises an ethylene propylene diene monomer continuous material on the outer surface and a metal rubber damping block embedded in the ethylene propylene diene monomer continuous material; the ethylene propylene diene monomer continuous material on the outer surface of the novel damping cushion layer wraps the outer surface of the metal rubber damping block, so that the metal rubber damping block is well isolated from the outside and is prevented from being influenced by external environment and damaged by corrosion.

The novel damping bed course between self-compaction concrete and bed plate, and this novel damping bed course has two rectangular holes to make in the boss embedding bed plate's of self-compaction concrete shrinkage pool in the length of a track board, the protruding block rubber of design and adjacent superstructure interlock each other for overall structure is more stable.

The continuous material of the outer surface of the novel damping cushion layer is made of ethylene propylene diene monomer rubber materials with good sealing performance, and ethylene propylene diene monomer rubber material protective layers are arranged around the upper part, the lower part, the left part and the right part of the inner metal rubber damping block, so that the overall stability and the corrosion resistance of the inner metal rubber damping block are protected. The inner metal rubber damper block is composed of a plurality of small triangular structures made of single-phase austenitic structure stainless steel wires with coiled spiral cross sections. The structural stability that the little triangle-shaped itself that utilizes to design can further the holistic stability of additional strengthening structure, and novel damping bed course passes through the friction each other between the wire with the vibration energy that upper portion track structure transmitted, converts the form of vibration energy conversion mechanical energy and heat energy and spreads away rapidly, and simultaneously, the cross-section that designs has certain elasticity performance for curling spiral helicine single-phase austenite structure stainless steel wire structure itself, can make the damping effect further strengthen.

The invention has the advantages that: the novel damping cushion layer comprises an ethylene propylene diene monomer continuous material on the outer surface and a metal rubber damping block embedded in the ethylene propylene diene monomer continuous material, and the same rubber material protective layers are arranged around the upper part, the lower part, the left part and the right part of the metal rubber damping block, so that the metal rubber damping block is well isolated from the outside, and the metal rubber damping block has better stability and corrosion resistance.

The damping characteristic that the designed elastic structure performance of the spiral winding of the section of the metal wire and the mutual friction among the metal wires are utilized to consume the vibration energy is utilized, and the damping rubber has longer service life and durability and more excellent damping performance compared with the common rubber material.

The novel metal rubber vibration damping block in the vibration damping cushion layer is formed by a plurality of small triangles which are made of single-phase austenitic structure stainless steel metal wires with coiled spiral cross sections, the structure is relatively stable, and the structure is simple and easy to process.

The designed bump type rubber block structure can be mutually meshed with the upper structure of the bump type rubber block structure, the vibration energy transmitted from a train can be quickly dissipated by utilizing the high damping ratio characteristic of the bump type rubber block structure while the overall stability of the structure is further enhanced, and then the high-frequency noise radiated by a wheel rail and the vibration energy transmitted from a track slab structure to a track structure under the slab are reduced, so that the effects of vibration reduction and noise reduction are achieved.

Drawings

Fig. 1 shows a CRTS iii slab ballastless track structure using the novel damping cushion layer according to the present invention.

Figure 2 shows a top view of the novel damping shim of the present invention.

Fig. 3 is a cross-sectional view showing the track direction of the novel damping pad layer of the present invention.

Fig. 4 is a top view of the metal rubber damping block inside the novel damping cushion of the present invention.

FIG. 5 is a structural diagram of a single phase austenitic stainless steel wire having a coiled helical cross-section for use in the novel damping shim of the present invention.

(1) -steel rail, (2) -prefabricated rail plate with rail bearing platform, (3) -self-compacting concrete, (4) -novel damping cushion, (4 a) -metal rubber damping block, (4 b) -single-phase austenitic structure stainless steel wire structure with coiled spiral section, (5) -ethylene propylene diene monomer continuous material, (6) -base plate.

Detailed Description

The following further describes embodiments of the present invention with reference to the drawings.

With reference to fig. 1 and 2, the CRTS iii slab ballastless track using the novel damping cushion (4) is composed of a steel rail (1), a prefabricated track slab (2) with a rail bearing platform, self-compacting concrete (3), a novel damping cushion (4) and a base plate (6), the novel damping cushion (4) is arranged between the self-compacting concrete (3) and the base plate (6), and the novel damping cushion (4) has two rectangular holes in the length of a track slab to enable the boss of the self-compacting concrete (3) to be embedded into the concave hole of the base plate (6).

The novel damping cushion layer (4) comprises an ethylene propylene diene monomer rubber continuous material (5) on the outer surface and a metal rubber damping block (4 a) embedded in the ethylene propylene diene monomer rubber continuous material, and the ethylene propylene diene monomer rubber continuous material (5) on the outer surface is wrapped on the outer surface of the metal rubber damping block (4 a), so that the metal rubber damping block (4 a) is well isolated from the outside and is prevented from being corroded and damaged due to the influence of the external environment. The metal rubber vibration damping block (4 a) inside the metal rubber vibration damping cushion layer (4) is composed of a plurality of small triangle structures made of single-phase austenite structure stainless steel wires (4 b) with the cross sections in a curling spiral shape, the stability of the whole structure can be further enhanced by utilizing the structural stability of the designed small triangles, the vibration energy transmitted by the upper track structure is converted into mechanical energy and heat energy through the mutual friction between the single-phase austenite structure stainless steel wires (4 b) with the curling spiral cross sections by the novel vibration damping cushion layer (4), meanwhile, the single-phase austenite structure stainless steel wires (4 b) with the designed cross sections in the curling spiral shape have certain elastic performance, and the vibration damping effect can be further enhanced. The dissipation of the vibration energy transmitted by the upper structure of the track is mainly realized by the mutual friction between single-phase austenitic structure stainless steel metal wires (4 b) with the coiled and spiral cross sections in the metal rubber vibration damping block (4 a) to convert the vibration energy into the forms of mechanical energy and heat energy and quickly diffuse the mechanical energy and the heat energy.

Compared with the traditional rubber vibration damping material, the novel vibration damping cushion layer (4) applied to the CRTS III type plate ballastless track can effectively deal with the problem of service life and aging, the influence of external environment such as temperature change or a series of negative influences on a wheel rail system, such as nonlinear characteristics generated under the influence of amplitude and frequency of upper train load. The ethylene propylene diene monomer continuous material (5) on the outer surface enables the metal rubber vibration damping block (4 a) to have good stability and corrosion resistance.

Claims (4)

1. The utility model provides a be applied to III plate-type ballastless track's of CRTS novel damping bed course which characterized in that: the novel damping cushion layer (4) comprises an ethylene propylene diene monomer rubber continuous material (5) on the outer surface and a metal rubber damping block (4 a) embedded in the ethylene propylene diene monomer rubber continuous material, wherein the metal rubber damping block (4 a) in the inner part is composed of a plurality of small triangular structures made of single-phase austenitic structure stainless steel metal wires (4 b) with coiled spiral cross sections; the novel damping cushion layer (4) is arranged between the self-compacting concrete (3) and the base plate (6); and the novel damping cushion layer (4) is provided with two rectangular holes in the length of a track plate to enable the boss of the self-compacting concrete (3) to be embedded into the concave hole of the base plate (6).

2. The novel damping cushion layer applied to the CRTS III slab ballastless track is characterized in that: the outer surface of the novel damping cushion layer (4) is made of ethylene propylene diene monomer continuous materials (5) with good sealing performance, and the inner metal rubber damping block (4 a) is made of a plurality of small triangular structures made of single-phase austenite stainless steel wires (4 b) with coiled spiral cross sections.

3. The novel damping cushion layer applied to the CRTS III slab ballastless track is characterized in that: the ethylene propylene diene monomer continuous material (5) on the outer surface of the novel damping cushion layer (4) wraps the metal rubber damping block (4 a), and edge protection layers of the same ethylene propylene diene monomer continuous material (5) are arranged on the upper, lower, left and right sides of the metal rubber damping block (4 a).

4. The novel damping cushion layer applied to the CRTS III slab ballastless track is characterized in that: the ethylene propylene diene monomer continuous material (5) wrapped on the outer surface of the novel damping cushion layer (4) is provided with rubber protruding blocks of the same ethylene propylene diene monomer continuous material (5), and the arranged rubber protruding block structures and the upper structure form a mutually meshed structural form.

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