CN216709289U

CN216709289U - Distributed noise-reducing and vibration-absorbing structure of rail train

Info

Publication number: CN216709289U
Application number: CN202122962583.4U
Authority: CN
Inventors: 朱胜; 闫鹏; 徐福生
Original assignee: Beijing Keying Jingyi Technology Co ltd
Current assignee: Beijing Keying Jingyi Technology Co ltd
Priority date: 2021-11-29
Filing date: 2021-11-29
Publication date: 2022-06-10
Anticipated expiration: 2031-11-29

Abstract

The utility model relates to a distributed noise-reducing and vibration-absorbing structure of a rail train, belonging to a noise-reducing and vibration-absorbing structure of a rail train body. The vibration absorber comprises an 80-180 Hz vibration absorber, a 140-180 Hz vibration absorber and a 180-220 Hz vibration absorber which are bonded on a bottom plate according to the number ratio of 3:4: 4. The advantage is novel structure, and the bump leveller absorbed energy is through bubble cotton and quality piece structure in the casing, and the consumption can, eliminates the inside vibration that produces of automobile body, and the carbon fiber casing has high conductibility, can absorb the vibration of outside conduction, and the noise energy that the in time transmission automobile body took place eliminates, does not hinder the installation of other position products of automobile body, does not have any performance influence to other products.

Description

Distributed noise-reducing and vibration-absorbing structure of rail train

Technical Field

The utility model belongs to a noise-reducing and vibration-absorbing structure of a rail train body, in particular to a distributed noise-reducing and vibration-absorbing structure of a rail train, which is arranged at a noise-reducing part of the train body.

Background

Along with the development of science and technology, rail trains are also continuously upgraded, comfort level becomes the key requirement of people besides the safety structure of a train body, noise also becomes the key point of improvement, two main sources of the noise are provided at present, one is generated by the train body, the other is conducted from the outside, the noise of the train body mainly occurs in a low-frequency section of 80-220 Hz, and the main noise conduction is conducted through the vibration of the train body.

Disclosure of Invention

The utility model provides a distributed noise-reducing and vibration-absorbing structure of a rail train, which aims to solve the problem of the existing train body noise mainly occurring in a low-frequency range of 80-220 Hz.

The technical scheme adopted by the utility model is as follows: the vibration absorber comprises an 80-180 Hz vibration absorber, a 140-180 Hz vibration absorber and a 180-220 Hz vibration absorber which are bonded on a bottom plate according to the number ratio of 3:4: 4.

The 80-120 Hz vibration absorber comprises a first steel block, a first vibration absorption foam, a first carbon fiber box and a first vibration space, wherein the first vibration absorption foam is bonded to the top of the inner box of the first square carbon fiber box, the first steel block is bonded to the lower side of the first vibration absorption foam, the first steel block and the first vibration absorption foam are square and equal in side length, and the periphery of the first steel block and the periphery of the first vibration absorption foam and the inner part of the first carbon fiber box are provided with the first vibration space.

The 140-180 Hz vibration absorber comprises a second steel block, a second vibration absorption foam, a second carbon fiber box and a second vibration space, wherein the second vibration absorption foam is bonded to the top of the inner box of the second square carbon fiber box, the second steel block is bonded to the lower portion of the second vibration absorption foam, the second steel block and the second vibration absorption foam are square, the side length of the second steel block is larger than that of the second vibration absorption foam, and the periphery of the second steel block and the periphery of the second vibration absorption foam and the inner portion of the second carbon fiber box are provided with the second vibration space.

The 180-220 Hz vibration absorber comprises a third steel block, a third vibration absorption foam, a third carbon fiber box and a third vibration space, wherein the three square vibration absorption foam are respectively bonded to the top of the box inside the third square carbon fiber box, the third steel block is bonded below the three vibration absorption foams, and the three steel blocks, the periphery of the third vibration absorption foam and the three carbon fiber box are provided with the third vibration space.

The carbon fiber shell has high conductivity, can absorb the vibration conducted from the outside, can transmit the noise energy generated by the vehicle body in time, can eliminate in time, does not block the installation of products at other positions of the vehicle body, and has no performance influence on other products.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural diagram of the 80-120 Hz vibration absorber of the present invention, in which the front and left box plates of the first carbon fiber box are removed;

FIG. 3 is a cross-sectional view of the 80-120 Hz vibration absorber of the present invention;

FIG. 4 is a cross-sectional view A-A of FIG. 3;

FIG. 5 is a schematic structural diagram of the 140-180 Hz vibration absorber of the present invention, in which the front and left box plates of the carbon fiber box II are removed;

FIG. 6 is a cross-sectional view of the 140 Hz to 180Hz vibration absorber of the present invention;

FIG. 7 is a cross-sectional view B-B of FIG. 6;

FIG. 8 is a schematic structural diagram of the 180-220 Hz vibration absorber of the present invention, in which the front and left box plates of the carbon fiber box III are removed;

FIG. 9 is a cross-sectional view of a 180-220 Hz vibration absorber of the present invention;

FIG. 10 is a cross-sectional view C-C of FIG. 9;

FIG. 11 is a graph of noise reduction test data for the 80-120 Hz vibration absorber of the present invention;

FIG. 12 is a data graph of noise reduction test data for a 140 Hz to 180Hz vibration absorber of the present invention;

FIG. 13 is a data chart of the noise reduction test of the 180-220 Hz vibration absorber of the present invention.

Detailed Description

Referring to fig. 1, the vibration absorber comprises an 80-180 Hz vibration absorber 1, a 140-180 Hz vibration absorber 2 and a 180-220 Hz vibration absorber 3 which are bonded on a bottom plate 4 according to the number ratio of 3:4: 4; the arrangement of the 80-180 Hz vibration absorbers 1, 140-180 Hz vibration absorbers 2, and 180-220 Hz vibration absorbers 3 listed in fig. 1 does not limit the protection range of the utility model, and any arrangement conforming to the number ratio of 3:4:4 is within the protection range.

The 80-120 Hz vibration absorber 1 comprises a first steel block 101, a first vibration absorption foam 102, a first carbon fiber box 103 and a first vibration space 104, wherein the first vibration absorption foam 102 is bonded to the top of an inner box of the first square carbon fiber box 103, the first steel block 101 is bonded below the first vibration absorption foam 102, the first steel block 101 and the first vibration absorption foam 102 are square and have equal side length, and the first vibration space 104 is formed between the peripheries of the first steel block 101 and the first vibration absorption foam 102 and the inner part of the first carbon fiber box 103;

the 140-180 Hz vibration absorber 2 comprises a second steel block 201, a second vibration absorption foam 202, a second carbon fiber box 203 and a second vibration space 204, wherein the second vibration absorption foam 202 is bonded to the top of the inner box of the second square carbon fiber box 203, the second steel block 201 is bonded below the second vibration absorption foam 202, the second steel block 201 and the second vibration absorption foam 202 are square, the side length of the second steel block 201 is larger than that of the second vibration absorption foam 202, and the periphery of the second steel block 201 and the periphery of the second vibration absorption foam 202 and the inner part of the second carbon fiber box 203 are provided with the second vibration space 204;

the 180-220 Hz vibration absorber 3 comprises a steel block III 301, a vibration absorption foam III 302, a carbon fiber box III 303 and a vibration space III 304, wherein the four square vibration absorption foam III 302 are respectively bonded to the top of the inner box of the square carbon fiber box III 303, the steel block III 301 is bonded below each vibration absorption foam III 302, and the peripheries of the steel block III 301 and the vibration absorption foam III 302 and the inner part of the carbon fiber box III 303 are provided with the vibration space III 304.

Principle of operation

The quality of the metal plate and the thickness of the foam are determined by the elastic modulus, pressure, density and thickness of the product. The 80-180 Hz vibration absorbers 1, the 140-180 Hz vibration absorbers 2 and the 180-220 Hz vibration absorbers 3 are arranged in a distributed mode according to the number ratio of 3:4:4, when a vehicle body vibrates, the energy absorbed by the vibration absorbers is consumed in the shell through a foam and mass block structure, and the carbon fiber shell has high conductivity and can transmit the noise energy generated by the vehicle body in time and eliminate the noise energy in time.

As can be seen from the graphs of FIGS. 11, 12 and 13, the utility model can reduce the noise of the car body by 3-4 dB by testing the 80-180 Hz vibration absorber 1, the 140-180 Hz vibration absorber 2 and the 180-220 Hz vibration absorber 3.

Claims

1. The utility model provides a rail train distributing type falls vibration-absorbing structure of making an uproar which characterized in that: the vibration absorber comprises an 80-180 Hz vibration absorber, a 140-180 Hz vibration absorber and a 180-220 Hz vibration absorber which are bonded on a bottom plate according to the number ratio of 3:4: 4.

2. The distributed noise and vibration reducing and absorbing structure for the rail train as claimed in claim 1, wherein: the 80-120 Hz vibration absorber comprises a first steel block, a first vibration absorption foam, a first carbon fiber box and a first vibration space, wherein the first vibration absorption foam is bonded to the top of the box inside the first square carbon fiber box, the first steel block is bonded to the lower portion of the first vibration absorption foam, the first steel block and the first vibration absorption foam are square and equal in side length, and the periphery of the first steel block and the periphery of the first vibration absorption foam and the inner portion of the first carbon fiber box are provided with the first vibration space.

3. The distributed noise and vibration reducing and absorbing structure for the rail train as claimed in claim 1, wherein: the 140-180 Hz vibration absorber comprises a second steel block, a second vibration absorption foam, a second carbon fiber box and a second vibration space, wherein the second vibration absorption foam is bonded to the top of the inner box of the second square carbon fiber box, the second steel block is bonded to the lower portion of the second vibration absorption foam, the second steel block and the second vibration absorption foam are square, the side length of the second steel block is larger than that of the second vibration absorption foam, and the periphery of the second steel block and the periphery of the second vibration absorption foam and the inner portion of the second carbon fiber box are provided with the second vibration space.

4. The distributed noise and vibration reducing and absorbing structure for the rail train as claimed in claim 1, wherein: the 180-220 Hz vibration absorber comprises a third steel block, a third vibration absorption foam, a third carbon fiber box and a third vibration space, wherein the three square vibration absorption foam are respectively bonded to the top of the box inside the third square carbon fiber box, the third steel block is bonded below the three vibration absorption foams, and the three steel blocks, the periphery of the third vibration absorption foam and the three carbon fiber box are provided with the third vibration space.