CN207828707U - A kind of rail resonance sound-absorbing device - Google Patents
A kind of rail resonance sound-absorbing device Download PDFInfo
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- CN207828707U CN207828707U CN201721579428.1U CN201721579428U CN207828707U CN 207828707 U CN207828707 U CN 207828707U CN 201721579428 U CN201721579428 U CN 201721579428U CN 207828707 U CN207828707 U CN 207828707U
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- absorbing device
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- resonance sound
- resonant cavity
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Abstract
A kind of rail resonance sound-absorbing device plays good inhibiting effect to realize that multiband noise absorbent and absorption frequency are controllable to the rail noise under the conditions of train operation.It includes：Shell surrounds between the rail both sides web of the rail and the flange of rail, with Rail Surface and forms closed cavity；Resonant absorber is fixedly installed on the inner wall of shell, several resonant cavity units are inside distributed with, and each resonant cavity unit is communicated by its air duct with closed cavity.
Description
Technical field
The utility model is related to rail traffic, more particularly to a kind of rail resonance sound-absorbing device.
Background technology
The noise that rail traffic vehicles induce in the overhead and highdensity operational process in tunnel causes serious noise
Pollution, affects the production and living of track subjective reflection, while also affecting rail traffic passenger's in noise transmission to compartment
Ride comfort sexual experience.Existing rail noise reduction technology is broadly divided into active noise reduction techniques and passive noise reduction technology.Active noise reduction
Technology mainly by reducing noise source, vibrate to reduce noise, such as damping-constraining steel rail and rail dynamic absorber by control sound source
Device etc., existing rail damper can only often decay noise caused by high-frequency vibration, can not handle low-frequency noise, and steel
Rail dynamic vibration absorber is only capable of inhibiting the vibration at rail intrinsic frequency, and active noise reduction techniques difficulty is big, with high costs；Passive drop
Technology of making an uproar is mainly the propagation path by cutting off noise, and obstruction makes an uproar sonic propagation to reduce noise, such as sound barrier, technology by
In mostly using porous sound absorption principle, it is difficult to realize the absorption of specific frequency noise, noise reduction is restricted, and in tunnel
Installation space is restricted.
Utility model content
The technical problem to be solved by the utility model is to provide a kind of rail resonance sound-absorbing devices, to realize that multiband is made an uproar
Sound absorption and absorption frequency are controllable, and good inhibiting effect is played to the rail noise under the conditions of train operation
Technical solution is as follows used by the utility model solves its technical problem：
A kind of rail resonance sound-absorbing device of the utility model, it is characterized in that it includes：Shell surrounds the rail both sides web of the rail
Closed cavity is formed between the flange of rail, with Rail Surface；Resonant absorber is fixedly installed on the inner wall of shell, interior distribution
There are several resonant cavity units, each resonant cavity unit to be communicated with closed cavity by its air duct.
The utility model has the beneficial effects that simple in structure, compact in design, can realize rail multiband noise absorbent,
Sound absorption effect is excellent, has good application prospect.
Description of the drawings
This specification includes following seven width attached drawing：
Fig. 1 is a kind of cross-section diagram of rail resonance sound-absorbing device of the utility model；
Fig. 2 is the enlarged drawing of the parts A in Fig. 1；
Fig. 3 is the expanded view of resonator in a kind of rail resonance sound-absorbing device of the utility model；
Fig. 4 is the cross-section diagram of resonator in a kind of rail resonance sound-absorbing device of the utility model；
Fig. 5 is a kind of cross-section diagram of rail resonance sound-absorbing device of the utility model；
Fig. 6 is the enlarged drawing of the parts B in Fig. 5；
Fig. 7 is the mounting means schematic diagram of shell in a kind of rail resonance sound-absorbing device of the utility model；
Component and corresponding label are shown in figure：Rail 10, shell 20, closed cavity 21, adhesive linkage 22, elastic insert
23, air duct 31, resonant cavity unit 32, shell structure 33, circular pipe type boss 34, pedestal 35, cover board 36.
Specific implementation mode
The utility model is further illustrated with reference to the accompanying drawings and examples.
Referring to Figures 1 and 2, a kind of rail resonance sound-absorbing device of the utility model includes：Shell 20 surrounds 10 liang of rail
Closed cavity 21 is formed between siding track waist and the flange of rail, with 10 surface of rail；Resonant absorber is fixedly installed on the inner wall of shell 20
On, several resonant cavity units 32 are inside distributed with, each resonant cavity unit 32 passes through its air duct 31 and 21 phase of closed cavity
It is logical.When rail 10 is generated vibration and radiated noise by dynamic excitation, the air column in air duct 31 is encouraged by sound wave
Vibration is generated, when the design frequency of the frequency of sound wave and resonator is close, air column generates resonance in air duct 31, passes through
Friction between air column and hole wall converts vibrational energy into thermal energy consumption and dissipates, to reach sound absorption effect.
With reference to Fig. 4, the volume of resonant cavity unit 32 is V, and a diameter of S of air duct 31, depth L enter when there is sound wave
When penetrating, when the depth in hole and much smaller aperture ratio wave length of sound, the flexible deformation very little of air column in aperture can be examined not
Consider, thus can be handled using air column as mass block, the air in resonant cavity unit 32 is due to compressibility, playing sky
The effect of gas spring forms a vibrational system for being similar to spring oscillator, between air column resonance frequency and resonator dimensions
Shown in relationship following formula, wherein A is 31 area of air duct：
When being vibrated under excitation of the air column in air duct 31 in external sound wave, due to rubbing between air column and hole wall
Wiping act on, at this moment the case where be equivalent to an air spring system for having damping.Due to the effect of damping, make the vibration of air column
Energy is gradually converted to thermal energy and loses, i.e., absorbs acoustic energy because of friction loss.If the frequency of incident acoustic wave and this
The intrinsic frequency of system is identical, and the air column of air duct 31 produces high vibration due to resonating, the acoustic energy being at this moment lost
Reach maximum.It is believed that the sound wave injected in air duct 31 is absorbed by resonant cavity, to reach maximum sound absorption effect
Fruit.
It follows that the resonant absorber outside the 10 both sides web of the rail of rail and the flange of rail is arranged by setting altogether in the utility model
It shakes 31 size of chamber unit 32 and air duct, you can different rail radiated noise frequencies is matched, to realize multiband rail
Noise abatement, high frequency noise can only be cut down, to the limit value of low frequency noise low effort by breaching previous steel rail vibration damping structure, right
Rail noise under the conditions of train operation plays good inhibiting effect.
Referring to Figure 1 and Figure 3, generally implement by three entities in 20 internal resonance sound absorber of shell, in the 10 both sides web of the rail of rail
Outer each setting one, in face of the web of the rail surface of rail 10 and flange of rail surface, another is arranged in 10 rail of rail air duct 31
Bottom is hereinafter, its air duct 31 faces flange of rail bottom surface.With reference to Fig. 7, the upper end of the shell 20 and the 10 both sides web of the rail of rail can be with
It is fixedly connected by adhesive linkage 22, elastic insert 23 is set on the inside of adhesive portion.
Referring to Figures 1 and 2, the ontology of the resonant absorber be shell structure 33, in be separated into out by parting bead it is several
Resonant cavity unit 32 corresponds to each resonant cavity unit 32 setting circular pipe type boss 34, circular pipe type boss on 33 outer wall of shell structure
34 endoporus forms air duct 31.With reference to Fig. 5 and Fig. 6, the ontology of the resonant absorber by pedestal 35 and can be also fixed on
The cover board 36 of its front end is constituted, several resonant cavity units 32 of distribution in pedestal 35, is offered and each resonant cavity unit on cover board 36
32 through-holes communicated form air duct 31.
The above is a kind of some principles of rail resonance sound-absorbing device of the utility model that explain through diagrams, and is not
The utility model is confined in shown and described concrete structure and the scope of application, therefore every phase for being possible to be utilized
It should change and equivalent, belong to the apllied the scope of the claims of the utility model.
Claims (4)
1. a kind of rail resonance sound-absorbing device, it is characterized in that it includes：Shell (20) surrounds rail (10) the both sides web of the rail and rail
Closed cavity (21) is formed between bottom, with rail (10) surface；Resonant absorber is fixedly installed on the inner wall of shell (20),
Several resonant cavity units (32) are distributed in it, each resonant cavity unit (32) passes through its air duct (31) and closed cavity
(21) it communicates.
2. a kind of rail resonance sound-absorbing device as described in claim 1, it is characterized in that：The ontology of the resonant absorber is shell
Body structure (33), it is interior that several resonant cavity units (32) are separated into out by parting bead, correspond on shell structure (33) outer wall each total
Circular pipe type boss (34) is arranged in the chamber unit (32) that shakes, and the endoporus of circular pipe type boss (34) forms air duct (31).
3. a kind of rail resonance sound-absorbing device as described in claim 1, it is characterized in that：The ontology of the resonant absorber is the bottom of by
Seat (35) and the cover board (36) for being fixed on its front end are constituted, several resonant cavity units (32) of distribution, cover board (36) in pedestal (35)
On offer the through-hole that is communicated with each resonant cavity unit (32) and form air duct (31).
4. a kind of rail resonance sound-absorbing device as described in claim 1, it is characterized in that：The upper end of the shell (20) and rail
(10) the both sides web of the rail is fixedly connected by adhesive linkage (22), setting elastic insert (23) on the inside of adhesive portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721579428.1U CN207828707U (en) | 2017-11-23 | 2017-11-23 | A kind of rail resonance sound-absorbing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721579428.1U CN207828707U (en) | 2017-11-23 | 2017-11-23 | A kind of rail resonance sound-absorbing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207828707U true CN207828707U (en) | 2018-09-07 |
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ID=63386600
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721579428.1U Active CN207828707U (en) | 2017-11-23 | 2017-11-23 | A kind of rail resonance sound-absorbing device |
Country Status (1)
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| CN (1) | CN207828707U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109518547A (en) * | 2018-12-03 | 2019-03-26 | 株洲时代新材料科技股份有限公司 | A kind of rail noise reduction damper and its fabrication and installation method, vibration and noise reducing method |
| CN111312202A (en) * | 2018-12-11 | 2020-06-19 | 上海汽车集团股份有限公司 | Silencing equipment |
-
2017
- 2017-11-23 CN CN201721579428.1U patent/CN207828707U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109518547A (en) * | 2018-12-03 | 2019-03-26 | 株洲时代新材料科技股份有限公司 | A kind of rail noise reduction damper and its fabrication and installation method, vibration and noise reducing method |
| CN109518547B (en) * | 2018-12-03 | 2020-11-10 | 株洲时代新材料科技股份有限公司 | Steel rail noise reduction damper, manufacturing and mounting method thereof and vibration and noise reduction method |
| CN111312202A (en) * | 2018-12-11 | 2020-06-19 | 上海汽车集团股份有限公司 | Silencing equipment |
| CN111312202B (en) * | 2018-12-11 | 2024-03-08 | 上海汽车集团股份有限公司 | Sound-deadening equipment |
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