CN207458570U - Foamed aluminium sound-absorbing piece and chip muffler assembly - Google Patents
Foamed aluminium sound-absorbing piece and chip muffler assembly Download PDFInfo
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- CN207458570U CN207458570U CN201721425412.5U CN201721425412U CN207458570U CN 207458570 U CN207458570 U CN 207458570U CN 201721425412 U CN201721425412 U CN 201721425412U CN 207458570 U CN207458570 U CN 207458570U
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- foamed aluminium
- sound
- absorbing
- absorbing piece
- muffler assembly
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- Soundproofing, Sound Blocking, And Sound Damping (AREA)
- Exhaust Silencers (AREA)
Abstract
The utility model discloses a kind of foamed aluminium sound-absorbing piece and chip muffler assemblies, foamed aluminium sound-absorbing piece includes perforated plate shell, the inside support within perforated plate shell, the foamed aluminium board being arranged within internal support, the stage casing of perforated plate shell is rectangular configuration, windward side is arc structure, afterbody is triangle wimble structure, the shape of inside support is identical with the shape in perforated plate shell stage casing, multi-disc foamed aluminium board is set within the support of inside, internal sound-absorbing cavity is formed between multi-disc foamed aluminium board.Foamed aluminium chip muffler assembly is that foamed aluminium sound-absorbing piece is inserted within the slot, and external sound-absorbing cavity is formed between foamed aluminium sound-absorbing piece.Pneumatic noise, into fine-crystal spume aluminium alloy material, generates violent resonant interaction and acoustic energy has been lost, so as to achieve the effect that sqouynd absorption lowering noise to the full extent after perforation shell steel plate is by a degree of weakening between air and inner space.
Description
Technical field
The utility model is related to muffler technical field, more particularly to the foamed aluminium sound-absorbing in a kind of subway ventilating system
Piece and chip muffler assembly.
Background technology
Silencer be allow air-flow by but can prevent or reduce a kind of device of sound transmission, silencer can stop
The propagation of sound wave allows air-flow by being the important measures for eliminating air power noise and the effective tool for controlling noise.Disappear
There are many sound device species, but study carefully its noise elimination mechanism, and it can be divided into six kinds of main types, i.e. dissipative muffler, resistance disappears
Sound device, impedance composite muffler, microperforated panel silencer, micropole diffusor and active silencer.Chip muffler is finger-type
Shape is the muffler of sheet.
With the rapid development of national communication cause, subway construction has become the important tool of urban transportation, and subway gives people
Also surrounding enviroment have been produced with influence while the people bring convenience, is quick.The noise generated during subway circulation and above and below ground
The open air exhaust of wind turbine generates the larger puzzlement that noise is brought to the work and life of neighbouring resident, in order to reduce the shadow of these noises
It rings, silencing means to be installed in subway ventilating system.
The inside noise reduction chip architecture for most mufflers that subway ventilating system or other occasions use at present is mostly perforation
Filling glass cotton in metallic plate, mineral wool in the construction process can damage the health of construction personnel.In mineral wool
Glass fibre to skin generate stimulation, glass fibre, which adheres to skin, can make skin itch and be difficult to clean；Glass fibre simultaneously
Also easily enter the respiratory system of people, suck a large amount of glass fibres for a long time, glass fibre can be deposited in lung, and the lung of people is produced
It is raw to seriously endanger.
Utility model content
The technical problem to be solved by the present invention is to provide a kind of hardness is high, acoustical absorptivity is strong, energy-absorbing damping, and
Preparation process is simple, the foamed aluminium sound-absorbing piece without environmental hazard and chip muffler assembly.
The utility model foamed aluminium sound-absorbing piece the technical solution adopted is that：A kind of foamed aluminium sound-absorbing piece, including perforated plate outside
Shell, the inside support within the perforated plate shell, the foamed aluminium board being arranged within the internal support, the perforation
The stage casing of plate shell is rectangular configuration, windward side is arc structure, afterbody is triangle wimble structure, the shape of the internal support with
The shape in the perforated plate shell stage casing is identical, sets multi-disc foamed aluminium board within the internal support, is steeped in the multi-disc
Internal sound-absorbing cavity is formed between foam aluminium sheet.
Further, the foamed aluminium board is through-hole foam aluminium sheet, the through-hole rate of the foamed aluminium board is 55%~65%,
Average pore size≤0.7mm, sound-absorption coefficient NRC >=0.75；The foamed aluminium board is 4, thickness 10mm, 4 foamed aluminiums
Interval between plate is followed successively by 30mm, 50mm, 30mm.
The utility model foamed aluminium chip muffler assembly the technical solution adopted is that：A kind of foamed aluminium chip muffler group
Part, including rectangular outer frame, sets sound-absorbing piece slot within the rectangular outer frame, and foamed aluminium sound-absorbing piece is inserted into institute
It states within slot, external sound-absorbing cavity is formed between the foamed aluminium sound-absorbing piece.
Further, the slot spacing is 100mm；The muffler assembly is made of 5 foamed aluminium sound-absorbing pieces, described
Foamed aluminium sound-absorbing piece is fixedly mounted with the external frame, alternatively, the muffler assembly is made of 5 foamed aluminium sound-absorbing pieces,
Wherein 1 foamed aluminium sound-absorbing piece is installed with the external frame activity, and 4 foamed aluminium sound-absorbing pieces are fixed with the external frame pacifies
Dress；Hinge is set between the foamed aluminium sound-absorbing piece and adjacent foamed aluminium sound-absorbing piece of the activity installation.
The beneficial effects of the utility model are：When noise is by external sound-absorbing cavity, foamed aluminium is brought by air-flow first and is inhaled
The perforated plate shell of tablet, the porous sound absorption characteristic of shell generate a degree of attenuation weakening effect to noise.Pneumatic noise
Have largely into fine-crystal spume aluminium alloy material, fine-crystal spume aluminium alloy material internal after perforation shell steel plate is by a degree of weakening
The hole of small connection, sound wave can go deep into material internal along these holes, and rubbing action, which occurs, with material turns acoustic energy
Turn to thermal energy.During sound wave incident, by sound-absorbing cavity, last of the twelve Earthly Branches nurse hertz resonant cavity is formed, on resonant frequency, air and inside are empty
Between between generate violent resonant interaction acoustic energy be lost, so as to achieve the effect that sqouynd absorption lowering noise to the full extent.
Description of the drawings
Fig. 1 is foamed aluminium sound-absorbing piece schematic diagram；
Fig. 2 is foamed aluminium chip muffler assembly front view；
Fig. 3 is foamed aluminium chip muffler assembly along Fig. 2A-A directions view；
Fig. 4 is foamed aluminium chip muffler group perspective diagram.
Wherein, 1. foamed aluminium sound-absorbing piece；2. foamed aluminium chip muffler assembly；11. perforated plate shell；12. outside perforated plate
Shell stage casing；13. shell windward side；14. shell afterbody；15. inside support；16. foamed aluminium board；17. inside sound-absorbing cavity；18.
Pulling rivet；21. external frame；22. movable sound-absorbing piece；23 idler wheel connectors；24. hinge；25. half range sound-absorbing piece；26. outside is inhaled
Sound cavity；211. transverse frame；212. vertical frames
Specific embodiment
Specific embodiment of the present utility model is described in further detail below in conjunction with the accompanying drawings.
As shown in Figure 1, foamed aluminium bloop 1 include perforated plate shell 11, within the perforated plate shell 11 in
Portion's support 15, the foamed aluminium board 16 being arranged within the internal support 15, by multiple pulling rivets 18 by perforated plate shell 11
It is fixed with inside support 15.Foamed aluminium board 16 is through-hole foam aluminium sheet, through-hole rate is 55%~65%, average pore size≤0.7mm,
Sound-absorption coefficient NRC >=0.75.Perforated plate shell stage casing 12 is that rectangular configuration, perforated plate shell windward side 13 are arc structure, wear
Orifice casing afterbody 14 is triangle wimble structure.The shape and the shape phase in the perforated plate shell stage casing 12 of the internal support 15
Together, multi-disc foamed aluminium board 16 is set within the internal support 15, internal sound-absorbing is formed between the multi-disc foamed aluminium board
Cavity 17.Foamed aluminium board 16 is generally 4, thickness 10mm, the interval between 4 foamed aluminium boards be followed successively by 30mm,
50mm、30mm。
Rectangular enclosure is generally made using 2mm Pierced Aluminum Planks, shell both ends are open-type.The respective shapes that will be completed
Inside support be placed within Pierced Aluminum Plank rectangular enclosure, with pulling rivet 18 by enclosure support fix.Then in inside
According to the interval setting fixed slot of 30mm, 50mm, 30mm within support, after being sequentially inserted into 51 0mm through-hole foam aluminium sheets,
Spot welding can be used to fix.Shell stage casing with fixed baffle is sealed, arc-shaped windward side and triangular pyramidal afterbody are added respectively
It is attached to housing both sides.
As shown in Figure 2 to 4, foamed aluminium bloop is assembled to form foamed aluminium chip muffler assembly 2, foamed aluminium chip
Muffler assembly 2 includes rectangular outer frame 21, and rectangular outer frame 21 includes transverse frame 211 and vertical frame 212.Institute
Setting bloop slot within rectangular outer frame 21 is stated, the slot spacing is 100mm.It will be described in the insertion of foamed aluminium bloop
Within slot, external sound-absorbing cavity 26 is formed between the foamed aluminium bloop.The muffler assembly is by 5 chip noise reductions
Device forms, and the chip muffler is fixedly mounted with the external frame, alternatively, the muffler assembly is disappeared by 5 foamed aluminiums
Tablet forms, wherein 1 foamed aluminium bloop is installed with the external frame activity, becomes movable bloop 22, movable
The lower part of bloop 22 is relatively-movable among the slot of shape external frame 21 by idler wheel connector 23.Other 4
Part foamed aluminium bloop is fixedly mounted with the external frame, is set between movable bloop 22 and adjacent foamed aluminium bloop
Hinge 24 is put, this structure can facilitate the installation and maintaining of foamed aluminium bloop.To reduce foamed aluminium chip muffler
The volume of component and the width for ensureing external sound-absorbing cavity 26 use half range sound-absorbing in the both sides of foamed aluminium chip muffler assembly
Piece 25, the width of half range sound-absorbing piece 25 are the half of bloop 1.
External frame generally is made using channel steel, angle steel, the welding of zinc-plated plate material and riveting, in the laterally every of external frame
Every 100mm spacing, the angle steel of weld length 100mm forms bloop slot, foamed aluminium bloop is sequentially inserted into housing and is welded
Connect fixation.Both sides bloop thickness halves to ensure the area of external sound-absorbing cavity and bloop than 1:1.It is general to use mobile hinge
Chain and idler wheel set a movable bloop, easy maintenance and replacement.
Claims (10)
1. a kind of foamed aluminium sound-absorbing piece, the inside including perforated plate shell, within the perforated plate shell supports, is arranged on
Foamed aluminium board within the internal support, which is characterized in that the stage casing of the perforated plate shell is rectangular configuration, windward side is
Arc structure, afterbody are triangle wimble structure, and the shape of the internal support is identical with the shape in the perforated plate shell stage casing,
Multi-disc foamed aluminium board is set within the internal support, internal sound-absorbing cavity is formed between the multi-disc foamed aluminium board.
2. sound-absorbing piece according to claim 1, which is characterized in that the foamed aluminium board is through-hole foam aluminium sheet.
3. sound-absorbing piece according to claim 2, which is characterized in that the through-hole rate of the foamed aluminium board for 55%~65%,
Average pore size≤0.7mm, sound-absorption coefficient NRC >=0.75.
4. sound-absorbing piece according to claim 1, which is characterized in that the foamed aluminium board is 4, thickness 10mm.
5. sound-absorbing piece according to claim 4, which is characterized in that the interval between 4 foamed aluminium boards is followed successively by
30mm、50mm、30mm。
6. a kind of foamed aluminium chip muffler assembly, including rectangular outer frame, which is characterized in that in the rectangular outer frame
Within sound-absorbing piece slot is set, foamed aluminium sound-absorbing piece is inserted within the slot, is formed between the foamed aluminium sound-absorbing piece
External sound-absorbing cavity.
7. muffler assembly according to claim 6, which is characterized in that the slot spacing is 100mm.
8. muffler assembly according to claim 6, which is characterized in that the muffler assembly is by 5 foamed aluminium sound-absorbings
Piece forms, and the foamed aluminium sound-absorbing piece is fixedly mounted with the external frame.
9. muffler assembly according to claim 6, which is characterized in that the muffler assembly is by 5 foamed aluminium sound-absorbings
Piece forms, wherein 1 foamed aluminium sound-absorbing piece is installed with the external frame activity, 4 foamed aluminium sound-absorbing pieces and the external frame
Frame is fixedly mounted.
10. muffler assembly according to claim 9, which is characterized in that it is described activity installation foamed aluminium sound-absorbing piece with
Hinge is set between adjacent foamed aluminium sound-absorbing piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721425412.5U CN207458570U (en) | 2017-10-31 | 2017-10-31 | Foamed aluminium sound-absorbing piece and chip muffler assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721425412.5U CN207458570U (en) | 2017-10-31 | 2017-10-31 | Foamed aluminium sound-absorbing piece and chip muffler assembly |
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| Publication Number | Publication Date |
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| CN207458570U true CN207458570U (en) | 2018-06-05 |
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| CN201721425412.5U Active CN207458570U (en) | 2017-10-31 | 2017-10-31 | Foamed aluminium sound-absorbing piece and chip muffler assembly |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107785008A (en) * | 2017-10-31 | 2018-03-09 | 辽宁融达新材料科技有限公司 | Foamed aluminium sound-absorbing piece and chip muffler assembly |
-
2017
- 2017-10-31 CN CN201721425412.5U patent/CN207458570U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107785008A (en) * | 2017-10-31 | 2018-03-09 | 辽宁融达新材料科技有限公司 | Foamed aluminium sound-absorbing piece and chip muffler assembly |
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