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Rigidly-connected broadband composite steel rail dynamic vibration absorption device

A rigid connection and dynamic vibration absorption technology, applied in the field of rail transit, can solve the problems of environmental aging of elastomers, insufficient clamping force, falling off, etc., to avoid elastic connection attenuation and vibration absorber falling off, reduce vibration noise, and increase consumption. Effect

Pending Publication Date: 2020-10-16
SHANGHAI UNIV OF ENG SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in engineering applications, it is found that the quality block of this kind of product is covered with elastic body, and the elastic body is exposed to the damp environment of the tunnel or the elevated exposure environment, and the elastic body is seriously affected by environmental aging; at the same time, the installation method of the rail shock absorber is passed The buckle is directly in contact with the upper surface of the elastic body. With the periodic wheel-rail impact, the contact surface of the elastic body in contact with the buckle will appear environmental corrosion and contact wear. Cracks will be severe and will fall off, and the metal buckle will also experience periodic fatigue. Shortcomings such as insufficient clamping force directly affect the effect of vibration and noise reduction

Method used

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  • Rigidly-connected broadband composite steel rail dynamic vibration absorption device
  • Rigidly-connected broadband composite steel rail dynamic vibration absorption device
  • Rigidly-connected broadband composite steel rail dynamic vibration absorption device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] like Figure 1-2 , a rigidly connected broadband composite rail dynamic vibration absorbing device, comprising a rail 1, a vibration absorber body 2 and a rigid fixing frame 3, the end clamping block 203 of the vibration absorber body 2 is in contact with the rail waist of the rail 1, and through rigid The fixing frame 3 symmetrically arranges the vibration absorber body 2 on both sides of the rail waist. The shock absorber device body 2 consists of a central long axis 201, an end nut 202 passing through the central long axis, a first end clamping block 203, an intermediate elastic unit 204 and an intermediate mass block 205 arranged in a staggered interval, The second end clamping block 206 and other components; the end clamping block of the vibration absorber body is in contact with the rail waist, while the intermediate mass block 205 and the intermediate elastic unit 204 are not in contact with the rail; the vibration absorber body 2 The central long axis 201 of th...

Embodiment 2

[0040] Embodiment 2 basically has the same structure and requirements as Embodiment 1, except that Embodiment 2 raises the center height of the central long axis 201, and simultaneously improves the center of gravity of the vibration-absorbing equipment body. The main purpose of designing the rail vibration absorbing device is to reduce the vibration of the rail itself. Since the rail transit line has straight sections and curved sections, the implementation case 1 works well in the straight section, and the embodiment 2 mainly considers the lateral vibration of the rail when the train passes through the curved section. is greater than the vertical direction, and the vibration of the rail head is also significantly greater than the vibration of the rail angle. In order to achieve a better vibration absorption effect, the inventive device must fit on the rail head as much as possible to reduce the vibration of the rail head. Therefore, embodiment 2 In the design, the center of g...

Embodiment 3

[0042] Embodiment 3 basically has the same structure and requirements as Embodiments 1 and 2. The difference is that Embodiment 3 changes the supporting structure of the rigid fixing frame 3. The rigid fixing frame 3 is divided into the upper structure 302 of the body pressure plate to lift the position of the shock absorber body. And fix it as close as possible to the position of the merging head, the lower structure of the body pressure plate 302 of the rigid fixing frame 3 is fixed at the corner of the rail. The main purpose of the design is still to reduce the vibration of the rail head by increasing the position of the vibration-absorbing device when the train passes through the curved section.

[0043] Compared with the existing damping body, the above-mentioned structure of the present invention has the following advantages:

[0044] 1. The elastic body of the existing shock absorber is completely exposed to the humid or insolation environment, and the elastic body is s...

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Abstract

The invention relates to a rigidly-connected broadband composite steel rail dynamic vibration absorption device which comprises a steel rail (1), a vibration absorber body (2) and a rigid fixing frame(3), the vibration absorber body (2) comprises a central long shaft (201), end clamping blocks located at the two ends of the central long shaft, a plurality of middle elastic units (204) located inthe middle of the central long shaft and arranged in a staggered mode at intervals, and a middle mass block (205). Wherein a first end part clamping block (203) and a second end part clamping block (206) are in fit contact with the rail web of the steel rail and are fixed on the steel rail through the rigid fixing frame (3). Compared with the prior art, the rigid connection broadband composite adjustable frequency setting not only improves the attenuation rate of steel rail vibration propagation, but also effectively controls the wheel rail abrasion and reduces the rail traffic vibration noisepollution.

Description

technical field [0001] The invention relates to the technical field of rail transportation, in particular to a rigidly connected wide-band composite rail dynamic vibration absorbing device, which is especially used for vibration absorption control of vibration and noise generated by forced rails during the operation of rail vehicles. Background technique [0002] At present, while the rapid development of urban rail transit provides people with fast and safe travel methods, the noise and vibration problems generated by it also seriously affect the quality of life of surrounding residents, endanger the safety of buildings around the line, and make the track itself Stability, security and longevity are also affected. Studies have shown that when the train speed is lower than 100km / h on rail transit lines, the rolling noise formed between the wheel and rail is the main component of rail transit noise and vibration. contribution is particularly evident. The most effective way ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01B19/00
CPCE01B19/003
Inventor 高晓刚王安斌徐忠辉鞠龙华刘浪李炜
Owner SHANGHAI UNIV OF ENG SCI