CN208036287U - Bogie assembly and Rail Transit System with it - Google Patents
Bogie assembly and Rail Transit System with it Download PDFInfo
- Publication number
- CN208036287U CN208036287U CN201721422056.1U CN201721422056U CN208036287U CN 208036287 U CN208036287 U CN 208036287U CN 201721422056 U CN201721422056 U CN 201721422056U CN 208036287 U CN208036287 U CN 208036287U
- Authority
- CN
- China
- Prior art keywords
- sound
- plate body
- bogie assembly
- assembly according
- bogie
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Abstract
The utility model discloses a kind of bogie assembly and with its Rail Transit System, bogie assembly includes：Power assembly；Sound panel, sound panel is respectively provided at the left and right sides of power assembly, and on the vertical plane perpendicular to left and right directions, the orthographic projection of power assembly is completely covered in the frontal plane of projection of sound panel.Bogie assembly according to the present utility model has good noise reduction, when bogie assembly is applied to Rail Transit System, significantly reduces the noise that power assembly is propagated to track girder left and right directions, improves the sound quality of rail vehicle external environment.
Description
Technical field
The utility model is related to technical field of rail traffic, more particularly, to a kind of bogie assembly and with its track
Traffic system.
Background technology
In the related technology, due to the noise of the power assembly (including bogie motor and brake disc etc.) below rail vehicle
It is larger, the fiberglass of 3mm or so is only set to carry out simple Acoustic treatment in the outside of rail vehicle.However, this processing
The noise reduction of method is limited, has much room for improvement.
Utility model content
The utility model aims to solve at least one of the technical problems existing in the prior art.For this purpose, the utility model carries
Go out a kind of bogie assembly, the bogie assembly has good noise reduction.
The utility model also proposes a kind of Rail Transit System with above-mentioned bogie assembly.
According to the bogie assembly of the utility model first aspect embodiment, including：Power assembly；Sound panel, it is described every
Soundboard is respectively provided at the left and right sides of the power assembly, and on the vertical plane perpendicular to left and right directions, the sound panel is just
The orthographic projection of the power assembly is completely covered in perspective plane.
According to the bogie assembly of the utility model embodiment, by the way that sound panel is arranged in the left and right sides of power assembly,
Sound panel is allow to reduce the noise that power assembly is propagated in the lateral direction, to be applied to rail traffic when bogie assembly
When system, it is obviously improved the sound quality of rail vehicle external environment.
Some embodiments according to the present utility model, the sound panel include：First plate body, first plate body are solid
Plate, first plate body are located at the side far from the power assembly of the sound panel；Second plate body, second plate body with
First plate body interval is arranged and limits sound absorption cavity between first plate body, and interval is formed on second plate body
The multiple sound-absorption holes being arranged.Sound absorption cavity may be constructed porous resonance sound-absorbing structure as a result, and playing, which reduces power assembly, radiates
Noise effect.
Some embodiments according to the present utility model, first plate body and second plate body are aluminium sheet, convenient for the
The molding of one plate body and the second plate body.
The punching rate of some embodiments according to the present utility model, second plate body is a, wherein a meets：0.1
≤a≤0.3.Thus, it is possible to meet the requirement of sound-absorbing frequency range by the way that the punching rate of the second plate body is arranged, it is dynamic to effectively reduce
The noise that power assembly radiates.
Some embodiments according to the present utility model, each sound-absorption hole are a diameter of d of circular hole and circular hole, wherein institute
State d satisfactions：0.5mm≤d≤4mm.Sound-absorption hole is simple in structure, easy to process, and can by be arranged sound-absorption hole size come
The requirement for meeting sound-absorbing frequency range, to reduce the noise that power assembly radiates.
Some embodiments according to the present utility model, the spacing between the two neighboring sound-absorption hole is b, wherein the b
Meet：1.5mm≤b≤8mm, under the premise of meeting the punching rate of the second plate body, ensure that the intensity of the second plate body.
Some embodiments according to the present utility model, the multiple sound-absorption hole are uniformly distributed, in order to process.
Some embodiments according to the present utility model, the sound absorption cavity is interior to be equipped with sound absorber materials and parts, to further decrease
Noise has widened sound-absorbing frequency range, improves the applicability of bogie assembly.
Some embodiments according to the present utility model, first plate body are equipped with clothes-hook, and the clothes-hook is by described first
Plate body, the sound absorber materials and parts and second plate body are fixedly linked, simple in structure, be easy to implement, while ensure that the first plate
It is connected between body, sound absorber materials and parts and the second plate body reliable.
According to the Rail Transit System of the utility model second aspect embodiment, including：Rail vehicle；Track girder, it is described
Rail vehicle is located at the top of the track girder and is travelled along the track girder；Implemented according to the above-mentioned first aspect of the utility model
The bogie assembly of example, the bogie assembly coordinate with the track girder and are connected with the rail vehicle.
According to the Rail Transit System of the utility model embodiment, by using above-mentioned bogie assembly, sound panel can
To reduce the noise that power assembly is propagated to track girder left and right directions, to improve the sound quality of rail vehicle external environment.
Some embodiments according to the present utility model, the lower part of the rail vehicle is equipped with the skirtboard being vertically arranged, described
Sound panel is covered on the skirtboard, to facilitate installation, the limit of sound panel.
The additional aspect and advantage of the utility model will be set forth in part in the description, partly will be from following description
In become apparent, or recognized by the practice of the utility model.
Description of the drawings
The above-mentioned and/or additional aspect and advantage of the utility model will in the description from combination following accompanying drawings to embodiment
Become apparent and is readily appreciated that, wherein：
Fig. 1 is the partial schematic diagram according to the bogie assembly of the utility model embodiment；
Fig. 2 is the partial sectional view of sound panel shown in Fig. 1；
Fig. 3 is the comparison diagram of the sound absorbing performance of three kinds of plate bodys；
Fig. 4 is the comparison diagram of the sound absorbing performance of three kinds of sound panels；
Fig. 5 is the comparison diagram of the sound insulation value of three kinds of sound panels.
Reference numeral：
Power assembly 1, sound panel 2, sub- sound panel 20,
First plate body 21, the second plate body 22, sound-absorption hole 22a, sound absorber materials and parts 23.
Specific implementation mode
The embodiments of the present invention are described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning
Same or similar element or element with the same or similar functions are indicated to same or similar label eventually.Below by ginseng
The embodiment for examining attached drawing description is exemplary, and is only used for explaining the utility model, and should not be understood as to the utility model
Limitation.
In the description of the present invention, it should be understood that term "upper", "lower", "left", "right", "vertical", " water
It is flat ", the orientation or positional relationships of the instructions such as "inner" be to be based on the orientation or positional relationship shown in the drawings, be merely for convenience of describing
The utility model and simplified description, do not indicate or imply the indicated device or element must have a particular orientation, with spy
Fixed azimuth configuration and operation, therefore should not be understood as limiting the present invention.In addition, defining " first ", " second "
Feature can explicitly or implicitly include one or more this feature.It is in the description of the present invention, unless another
It is described, the meaning of " plurality " is two or more.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " is pacified
Dress ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally
Connection；It can be mechanical connection, can also be electrical connection；Can be directly connected, can also indirectly connected through an intermediary,
It can be the connection inside two elements.For the ordinary skill in the art, it can understand above-mentioned art with concrete condition
The concrete meaning of language in the present invention.
Below with reference to Fig. 1-Fig. 5 descriptions according to the bogie assembly of the utility model first aspect embodiment.
As shown in Figure 1, according to the bogie assembly of the utility model embodiment, including power assembly 1 and sound panel 2.
Sound panel 2 is respectively provided at the left and right sides of power assembly 1, on the vertical plane perpendicular to left and right directions, sound panel 2
Frontal plane of projection the orthographic projection of power assembly 1 is completely covered.That is, on the vertical plane on left and right directions, position
The orthographic projection of power assembly 1 is completely covered in the frontal plane of projection of the sound panel 2 in 1 left side of power assembly, is located at 1 right side of power assembly
The frontal plane of projection of sound panel 2 orthographic projection of power assembly 1 is completely covered.
As a result, by being respectively provided with sound panel 2 in the left and right sides of power assembly 1, the noise that power assembly 1 generates is to track
When beam left and right directions propagates across sound panel 2, sound panel 2 can reduce noise, to be handed over applied to track when bogie assembly
When way system, bogie assembly and track girder coordinate, and bogie is connected with rail vehicle to drive rail vehicle to travel, due to
Track girder is elevated-beam, and sound panel 2 can reduce the noise that power assembly 1 is propagated to track girder left and right directions, avoid this
The external environment of noise effect rail vehicle, the sound quality to improve rail vehicle external environment include vehicle below track girder
The sound quality of environment.Here, it should be noted that " left and right directions " is vertical with upper and lower directions and drives a vehicle with rail vehicle
Direction is vertical.Wherein, rail vehicle can be single-track vehicle.
According to the bogie assembly of the utility model embodiment, by the way that sound panel is arranged in the left and right sides of power assembly 1
2 so that sound panel 2 can reduce the noise that power assembly 1 is propagated in the lateral direction, to be applied to track when bogie assembly
When traffic system, it is obviously improved the sound quality of rail vehicle external environment.
It is understood that sound panel 2 can be overall structure or sound panel 2 for multiple sub- sound panels 20 splice and
At preferably to meet practical application.
In the further embodiment of the utility model, sound panel 2 includes the first plate body 21 and the second plate body 22, the first plate
Body 21 is solid slab, and the first plate body 21 is located at the side of the separate power assembly 1 of sound panel 2, the second plate body 22 and the first plate body
21, between left and right every being arranged and limiting sound absorption cavity between the first plate body 21, are formed with spaced multiple on the second plate body 22
Sound-absorption hole 22a, each sound-absorption hole 22a can run through the second plate body 22 along the thickness direction of the second plate body 22, to which sound absorption cavity can
To constitute porous resonance sound-absorbing structure, play the role of reducing the noise that power assembly 1 radiates, and due to sound absorption cavity
It is simple in structure, facilitate the processing of sound panel 2.Wherein, the first plate body 21 and the second plate body 22 can be selected as aluminium sheet, be convenient for first
The molding of plate body 21 and the second plate body 22, to further facilitate the processing of sound panel 2.
It is total to the object for hanging with certain mass thereon for a spring specifically, porous resonance sound-absorbing structure can compare
With the simple vibrational system of composition, using the air column in sound-absorption hole 22a pore-throats as incompressible friction free fluid, and
It is compared as the quality (acoustically be known as acoustic mass) of vibrational system, will there is the sound absorption cavity of air to be compared to spring, it can resist
The pressure for refusing external sound wave is equivalent to neck degree, referred to as acoustic compliance.When external sound wave passes to sound absorption cavity, the sky in sound-absorption hole 22a pore-throats
Air column under the action of sound wave get up as piston by movement, to which partial air molecule makes sound with the holes sound-absorption hole 22a wall friction
Thermal energy can be changed into and consume and (be acoustically known as acoustic resistance), this is equivalent to the frictional damping of mechanical oscillation.In general, the ruler of sound absorption cavity
The very little wavelength for being significantly less than external sound wave, air column in sound-absorption hole 22a pore-throats do under the action of sound wave as piston past
Multiple movement, will resonate when the intrinsic frequency of sound absorption cavity is consistent with the frequency of external sound wave, at this time in sound-absorption hole 22a pore-throats
The amplitude of air column reaches maximum value, and acoustic resistance is maximum, and the acoustic energy of consumption is most, to reach effective noise reduction.
Here, it should be noted that due to will occur altogether when the intrinsic frequency of sound absorption cavity is consistent with the frequency of external sound wave
It shakes, the acoustic energy of sound absorption cavity consumption at this time is most, so (or being sound-absorbing frequency range) of sound absorption cavity to frequency range near resonant frequency
External sound wave has a preferable absorption, and the distance between the first plate body 21 and the second plate body 22, the second plate body 22 punching rate and
The parameters such as the size of sound-absorption hole 22a can influence sound-absorbing frequency range, so as to according to sound-absorbing frequency range come be arranged the first plate body 21 with
The size etc. of the distance between second plate body 22, the punching rate of the second plate body 22 and sound-absorption hole 22a, and sound-absorbing frequency range can basis
The frequency for the noise that power assembly 1 generates is set.
In some embodiments, the second plate body 22 punching rate (i.e. on the second plate body 22 area of all sound-absorption hole 22a it
With the ratio for the surface area for accounting for the second plate body 22) it is a, wherein a meets：0.1≤a≤0.3.Thus, it is possible to pass through setting the
The punching rates of two plate bodys 22 meets the requirement of sound-absorbing frequency range, to effectively reduce the noise that power assembly 1 radiates.
In some alternative embodiments of the utility model, each sound-absorption hole 22a is a diameter of d of circular hole and circular hole,
Middle d meets：0.5mm≤d≤4mm.Sound-absorption hole 22a is simple in structure, easy to process, and can be by being arranged sound-absorption hole 22a's
Size meets the requirement of sound-absorbing frequency range, to reduce the noise that power assembly 1 radiates.It is understood that sound-absorption hole 22a
Can also be other shapes, such as slotted eye, tri-angle-holed or elongate holes etc..Certainly, the size of multiple sound-absorption hole 22a
Can be not exactly the same, while can be uniformly distributed between multiple sound-absorption hole 22a, such as multiple rows of multiple row is uniformly distributed or in a ring
It is uniformly distributed, it can be with non-uniform Distribution between multiple sound-absorption hole 22a.
In some embodiments, the spacing between two neighboring sound-absorption hole 22a is b, and wherein b meets：1.5mm≤b≤
8mm.Avoid as a result, causes the intensity of the second plate body 22 insufficient because the spacing between two neighboring sound-absorption hole 22a is too small, together
When avoid causing the punching rate of the second plate body 22 to cannot be satisfied demand because the spacing between two neighboring sound-absorption hole 22a is excessive,
To under the premise of meeting the punching rate of the second plate body 22, ensure that the intensity of the second plate body 22.For example, working as each sound-absorption hole
When 22a is circular hole and the diameter d=0.5mm of circular hole, the spacing b=1mm between two neighboring sound-absorption hole 22a；Or each suction
When sound hole 22a is circular hole and the diameter d=2mm of circular hole, the spacing b=4mm between two neighboring sound-absorption hole 22a.
In the further embodiment of the utility model, sound absorber materials and parts 23 are equipped in sound absorption cavity.Sound absorber materials and parts 23
The rambling channel that inside is made of numerous micro-pore, external sound wave enters these channels, and continues in channel
It propagates, since there are friction and damping in the channel in sound absorber materials and parts 23 to sound wave, to which sound absorber materials and parts 23 can incite somebody to action
Acoustic energy is converted into thermal energy and consumes, and reduces the acoustic energy of noise, further reduced noise as a result, and by sound absorption cavity
Interior setting sound absorber materials and parts 23 can suitably increase punching rate, can increase the friction of sound-absorption hole 22a pore-throat neck portions in this way
Resistance to widen sound-absorbing frequency range, and then improves the applicability of bogie assembly.Wherein, sound absorber materials and parts 23 preferably fill
Full entire sound absorption cavity, may be implemented more balancedly noise reduction.Sound absorber materials and parts 23 are chosen as fire-retardant 23 (example of sound absorber materials and parts
Such as high fire-retardance sound-absorbing material), it has a safety feature, but not limited to this, such as sound absorber materials and parts 23 can also be acoustical cotton.
In specific embodiment of the utility model, the first plate body 21 is equipped with clothes-hook, and clothes-hook is by the first plate body 21, sound-absorbing
Material pieces 23 and the second plate body 22 are fixedly linked.Specifically, sound absorber materials and parts 23 and the second plate body 22 have been respectively formed on through-hole,
Clothes-hook passes through the through-hole on sound absorber materials and parts 23 and the second plate body 22 with by the first plate body 21, sound absorber materials and parts 23 and the second plate body
22 are fixedly linked, simple in structure, be easy to implement, at the same ensure that the first plate body 21, sound absorber materials and parts 23 and the second plate body 22 it
Between connect it is reliable.Certainly, the number of clothes-hook and arrangement can be arranged according to actual demand, actually be answered with preferably meeting
With.
It is understood that connection type between the first plate body 21, sound absorber materials and parts 23 and the second plate body 22 can be with
Be set as other modes according to actual demand, such as be threadedly coupled, rivet etc..
Inventor has chosen three plate bodys and carries out analog simulation to it respectively, obtains the sound absorbing performance of each plate body, knot
Fruit is as shown in Figure 3.Wherein, the thickness of plate body one, plate body two and plate body three is 2mm, and plate body one is non-porous solid plate body, plate body
With the diameter d=1mm, two neighboring sound-absorption hole 22a that multiple sound-absorption hole 22a, each sound-absorption hole 22a are circular hole and circular hole on two
Between spacing b=5mm, also with the diameter d that multiple sound-absorption hole 22a, each sound-absorption hole 22a are circular hole and circular hole on plate body three
Spacing b=3mm between=1mm, the two sound-absorption hole 22a that are connected under the same conditions, has sound-absorption hole as seen from Figure 3
The sound-absorption coefficient of the plate body of 22a is larger, sound-absorbing effect is preferable, and sound-absorption hole 22a is more intensive to a certain extent can be notable
Promoted plate body sound-absorbing effect, that is to say, that the second plate body 22 during design, under the premise of ensureing its intensity, its
On sound-absorption hole 22a can be arranged to it is more intensive, wherein the second plate body 22 be chosen as moist-proof board, fire-proof plate, common weedtree plate,
Environmental protection board, three-layer composite board etc..
In addition, to verify the sound absorbing performance and soundproof effect of the sound panel 2 according to the utility model embodiment, person is invented
Taken three kinds of sound panels and it tested respectively with standing wave tube transfer function method, measure each sound panel sound absorbing performance and
Sound transmission loss, as shown in Figure 4 and Figure 5.Wherein, sound panel one is pasted by solid aluminium sheet and acoustical cotton and is formed, and sound panel two is by perforating
Aluminium sheet and acoustical cotton paste composition, and sound panel three is a specific embodiment of the sound panel 2 according to the utility model and sound insulation
Plate three is made of solid aluminium sheet, acoustical cotton and Pierced Aluminum Plank, is all had on the Pierced Aluminum Plank of sound panel two and sound panel three multiple
Sound-absorption hole 22a, acoustical cotton thickness be 40mm, the thickness of Pierced Aluminum Plank and solid aluminium sheet is 2mm.It can be with by Fig. 4 and Fig. 5
Find out, the average sound transmission loss of sound panel three is 23dB, average sound-absorption coefficient is more than or equal to 0.63, i.e. sound panel three has good
Sound absorbing performance and sound insulation value, especially noise frequency range is between 500Hz~2000Hz.
According to the Rail Transit System of the utility model second aspect embodiment, including rail vehicle, track girder and steering
Frame assembly.
Rail vehicle is located at the top of track girder and rail vehicle is travelled along track girder, and bogie assembly coordinates with track girder
And bogie assembly is connected with rail vehicle to drive rail vehicle to travel, sound panel 2 can reduce power assembly 1 to track girder
The noise that left and right directions is propagated, avoids the external environment of the noise effect rail vehicle, to promote track outside vehicle environment
Sound quality includes the sound quality of vehicle driving environment below track girder.
According to the Rail Transit System of the utility model embodiment, by using above-mentioned bogie assembly, sound panel 2 can
To reduce the noise that power assembly 1 is propagated to track girder left and right directions, to improve the sound quality of rail vehicle external environment.
In the alternative embodiment of the utility model, the lower part of rail vehicle is equipped with the skirtboard being vertically arranged, and sound panel 2 covers
It covers on skirtboard, to facilitate installation, the limit of sound panel 2.It is understood that sound panel 2 can be covered in skirtboard
Inside, sound panel 2 can also be covered in the outside of skirtboard.Here, it should be noted that direction "inner" refers to close to power assembly
The direction of 1 vertical central axis, opposite direction are defined as "outside".
Other compositions according to the Rail Transit System of the utility model embodiment etc. and operation are common for this field
All it is known for technical staff, is not detailed herein.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " illustrative examples ",
The description of " example ", " specific example " or " some examples " etc. means specific features described in conjunction with this embodiment or example, knot
Structure, material or feature are contained at least one embodiment or example of the utility model.In the present specification, to above-mentioned art
The schematic representation of language may not refer to the same embodiment or example.Moreover, description specific features, structure, material or
Person's feature can be combined in any suitable manner in any one or more of the embodiments or examples.
While there has been shown and described that the embodiments of the present invention, it will be understood by those skilled in the art that：
Can these embodiments be carried out with a variety of variations in the case where not departing from the principles of the present invention and objective, modification, replaced
And modification, the scope of the utility model are limited by claim and its equivalent.
Claims (11)
1. a kind of bogie assembly, which is characterized in that including：
Power assembly；
Sound panel, the sound panel are respectively provided at the left and right sides of the power assembly, in the vertical plane perpendicular to left and right directions
On, the orthographic projection of the power assembly is completely covered in the frontal plane of projection of the sound panel.
2. bogie assembly according to claim 1, which is characterized in that the sound panel includes：
First plate body, first plate body are solid slab, and first plate body is located at the total far from the power of the sound panel
At side；
Second plate body, second plate body and first plate body interval are arranged and limit sound-absorbing between first plate body
Chamber is formed with spaced multiple sound-absorption holes on second plate body.
3. bogie assembly according to claim 2, which is characterized in that first plate body and second plate body are
Aluminium sheet.
4. bogie assembly according to claim 2, which is characterized in that the punching rate of second plate body is a, wherein institute
State a satisfactions：0.1≤a≤0.3.
5. bogie assembly according to claim 2, which is characterized in that each sound-absorption hole is the straight of circular hole and circular hole
Diameter is d, wherein the d meets：0.5mm≤d≤4mm.
6. bogie assembly according to claim 2, which is characterized in that the spacing between the two neighboring sound-absorption hole is
B, wherein the b meets：1.5mm≤b≤8mm.
7. bogie assembly according to claim 2, which is characterized in that the multiple sound-absorption hole is uniformly distributed.
8. bogie assembly according to claim 2, which is characterized in that be equipped with sound absorber materials and parts in the sound absorption cavity.
9. bogie assembly according to claim 8, which is characterized in that first plate body is equipped with clothes-hook, the extension
First plate body, the sound absorber materials and parts and second plate body are fixedly linked by nail.
10. a kind of Rail Transit System, which is characterized in that including：
Rail vehicle；
Track girder, the rail vehicle are located at the top of the track girder and are travelled along the track girder；
Bogie assembly according to any one of claim 1-9, the bogie assembly and the track girder coordinate and
It is connected with the rail vehicle.
11. Rail Transit System according to claim 10, which is characterized in that the lower part of the rail vehicle is equipped with vertical
The skirtboard of setting, the sound panel are covered on the skirtboard.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721422056.1U CN208036287U (en) | 2017-10-30 | 2017-10-30 | Bogie assembly and Rail Transit System with it |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721422056.1U CN208036287U (en) | 2017-10-30 | 2017-10-30 | Bogie assembly and Rail Transit System with it |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208036287U true CN208036287U (en) | 2018-11-02 |
Family
ID=63958449
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721422056.1U Active CN208036287U (en) | 2017-10-30 | 2017-10-30 | Bogie assembly and Rail Transit System with it |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208036287U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112810640A (en) * | 2019-11-18 | 2021-05-18 | 中车长春轨道客车股份有限公司 | High-performance sound absorption skirtboard applied to railway vehicle |
-
2017
- 2017-10-30 CN CN201721422056.1U patent/CN208036287U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112810640A (en) * | 2019-11-18 | 2021-05-18 | 中车长春轨道客车股份有限公司 | High-performance sound absorption skirtboard applied to railway vehicle |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR100399734B1 (en) | Sound absorption structure | |
| CN203773937U (en) | Sound insulating and absorbing honeycomb panel | |
| CN205692567U (en) | A kind of low frequency composite sound absorbing device | |
| KR101549045B1 (en) | Sound insulation wall equipped with sound-absorbing body | |
| CN208938645U (en) | Full range spreads silencing apparatus and vent passages sound-attenuating system | |
| CN208036287U (en) | Bogie assembly and Rail Transit System with it | |
| CN111048059A (en) | Micro-perforated plate spider web honeycomb sandwich sound absorption bearing composite structure | |
| CN205576772U (en) | Pin -connected panel high -speed railway sound barrier acoustic baffle | |
| CN107401225A (en) | The sound absorption and insulation structure that a kind of flexible particle is piled up | |
| CN208036286U (en) | Bogie assembly and Rail Transit System with it | |
| CN106703234A (en) | Resistance-double resonance composite sound absorbing profile | |
| CN202913368U (en) | Sound barrier top noise reduction device | |
| CN102261045B (en) | Nose-shaped metal sound barrier unit plate for high-speed railway | |
| CN207607501U (en) | Bogie assembly and Rail Transit System with it | |
| CN101725119A (en) | Sound barrier for high-speed railway | |
| CN203977620U (en) | The light steel wall of sound insulation | |
| CN209581494U (en) | Sound absorber for rail vehicle sleeping berth parlor | |
| CN207241953U (en) | Loading board in a kind of sound absorption of convenient dismounting | |
| CN201713768U (en) | Connecting structure for sound barrier of high-speed railway | |
| CN205530436U (en) | Low noise driver's cabin structure and contain engineering machine tool of this driver's cabin | |
| CN112227237B (en) | Sound barrier containing air resonant cavity | |
| KR200480057Y1 (en) | Using micro-perforated plate and the soundproofing | |
| CN209249069U (en) | Sound absorber | |
| CN201315153Y (en) | Sound insulation device made of composite materials in engine compartment | |
| CN201770948U (en) | Bottom edge decoupling structure of sound barrier |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |