CN201594039U - Aircraft engine test bed exhaust silencing device - Google Patents
Aircraft engine test bed exhaust silencing device Download PDFInfo
- Publication number
- CN201594039U CN201594039U CN2009202761815U CN200920276181U CN201594039U CN 201594039 U CN201594039 U CN 201594039U CN 2009202761815 U CN2009202761815 U CN 2009202761815U CN 200920276181 U CN200920276181 U CN 200920276181U CN 201594039 U CN201594039 U CN 201594039U
- Authority
- CN
- China
- Prior art keywords
- exhaust
- aircraft engine
- engine test
- silencing device
- exhaust silencing
- 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.)
- Expired - Fee Related
Links
Images
Abstract
The utility model relates to an aircraft engine test bed exhaust silencing device, wherein rows of silencers are vertically layered and staggered in the device which is mounted on a fixed base. The exhaust silencing device is characterized in that a circular-arc ferrule is arranged on the windward side of each silencer, a conical guide ferrule is arranged at the tail of the silencer, each silencer sequentially comprises a perforated plate, a wire mesh and waterproof glass cloth from outside to inside and sound absorbing materials filled inside, and a distance between an upper row of silencers and a lower row of silencers ranges from 50mm to 100mm. Compared with the prior art, the aircraft engine test bed exhaust silencing device has the advantages that 1, the conventional aircraft engine test bed silencing mode is changed by aid of the exhaust silencing device which achieves better silencing effect and has better noise-reducing function on low-frequency primary noise particularly, and 2, the exhaust silencing device has the advantages of simple structure, convenient installation, long service life and the like.
Description
Technical field
The utility model is a kind of aircraft engine test stand exhaust muffling device, belongs to the technical field of structures of product.Mainly apply to the exhaust system noise-abatement equipment of the aircraft engine test stand of big flow, high flow rate.
Background technology:
When aeromotor is carried out ground check, factory test in special-purpose test bay, can produce the very noisy of noise figure up to 130 ~ 160 decibels, in order not influence this zone resident's operate as normal life, test bay need possess good noise elimination noise reduction function, sound frequency is wide during at aeroengine test run, characteristics such as big flow, high flow rate, existing engine testsand has adopted various informative noise-abatement equipment, the present modal methods such as baffle formula, resistance expansion cavate, shell and tube noise reduction that have.
The principle of baffle formula silene system is the passage that constructs labyrinth-like in civil engineering structure, sound is sponged by the acoustic board on the wall by passage the time, and its shortcoming is that exhaust tower is too high, the construction costs height, acoustic board is installed inconvenience, and for the intrinsic shortcoming of medium and low frequency noise also existence itself; And the flow resistance of resistance expansion cavate silene system big (20% percent of pass is only arranged) for guaranteeing flow resistance, just needs aisle spare is increased, increased input.And the material of expansion chamber structure also needs the test of engineering practice under mal-conditions such as exhaust stream vibration, high temperature, high speed, and this in addition structure also is not easy to maintenance, also has the shell and tube noise reduction method in addition, also has shortcomings such as low frequency noise elimination effect is bad.
Summary of the invention
The utility model designs at above-mentioned problems of the prior art just a kind of aircraft engine test stand exhaust muffling device is provided, its objective is provides a kind of sound-attenuating system under big flow, the strong noise environment that is used for, the noise that can more effectively eliminate aeroengine test run and produced.
The objective of the invention is to realize by following technical measures:
This kind aircraft engine test stand exhaust muffling device, in this device, layering from top to bottom, be staggeredly equipped with exhaust box in a row, exhaust box is installed on the holder, it is characterized in that: the windward side of exhaust box is circular arc packet header, afterbody is taper water conservancy diversion packet header, and exhaust box structure from outside to inside is followed successively by perforated plate, woven wire, waterproof glass cloth and inner acoustic absorbant of filling, and the distance between the two rows exhaust box is 50～100mm.
Evenly arrange the board-like sound suppressor of this kind on the exhaust passage of engine testsand, this sound suppressor can be designed to different-thickness according to different noise spectrum values.Exhaust box can be arranged into several layers according to the sounding body noise figure, and the dislocation arrangement, makes air-flow become the S shape to flow in passage.
The external form of exhaust box adopts shuttle template formula structure, can play guide effect to high velocity air; Skin at sound absorber is enclosed with waterproof glass cloth, prevents the rainwater intrusion; Welding layer of steel wire net in the perforated plate, this device can effectively prevent engine exhaust high velocity air washing away packing material in the exhaust box; And preventing that packing material from exposing obstruction sound absorption hole, circular arc type and wedgelike water conservancy diversion packet header make exhaust box form shuttle shape structure, and high velocity air is had guide effect, can reduce the exhaust resistance of engine exhaust system.
For different engine noise characteristics, the sound suppressor thickness of engine testsand exhaust passage is decided to be between 400 ~ 600mm, and the distance between the exhaust box also fixes between 400 ~ 600mm.The length of exhaust box determines that by the size of exhaust passage length range is between 12 ~ 16m.After testing, this sound-attenuating system has best acoustically effective in 250 ~ 2000Hz frequency band, and the frequency values of noise attentuation maximum is 1000Hz.
Description of drawings
Fig. 1 is the structural representation of the utility model device
Embodiment
Below with reference to drawings and Examples the utility model is further described:
Shown in accompanying drawing 1, a kind of aircraft engine test stand exhaust muffling device, in this device, layering from top to bottom, be staggeredly equipped with exhaust box in a row 1, both sides are exhaust passage 3, and during installation, exhaust box 1 is installed on the mount pad 2 that is preset in the exhaust passage, the mount pad 2 of both sides is welded on the pre-embedded steel slab, limits it and swings.It is characterized in that: the windward side of exhaust box 1 is circular arc packet header 8, afterbody is taper water conservancy diversion packet header 9, exhaust box 1 structure from outside to inside is followed successively by perforated plate 4, woven wire 6, waterproof glass cloth 7 and inner acoustic absorbant 5 of filling, and the distance between the two rows exhaust box 1 is 50～100mm.The thickness of this exhaust box 1 is 400～600mm, and length is determined by the size of exhaust passage, is generally 12～16m.
Its outside and air-flow contact position are perforated plate 4, and its inner welded has the woven wire 6 of detailed catalogue, and the filling material in the sound suppressor is a block of glass wool 5, as can being that unit weight is 32kg/m
3The centrifugally glass-wool plate, in order to prevent rainwater, the outside of filling material is with waterproof glass cloth 7 parcels, in addition in order to reduce flow resistance, adopts circular arc type packet header 8 and taper water conservancy diversion packet header 9 at the windward side and the afterbody of exhaust box.
After testing, this utility model device has best acoustically effective in 250 ~ 2000Hz frequency band, and the frequency values of noise attentuation maximum is 1000Hz.
Compared with prior art, the utility model device has the following advantages:
1. the utility model has changed aircraft engine test stand noise reduction mode, and soundproof effect is better, particularly noise of low frequency is had good Noise Reduction;
2. this device has the characteristics such as simple in structure, easy for installation, long service life.
Claims (2)
1. aircraft engine test stand exhaust muffling device, in this device, layering from top to bottom, be staggeredly equipped with exhaust box in a row (1), exhaust box (1) is installed on the holder (2), it is characterized in that: the windward side of exhaust box (1) is circular arc packet header (8), afterbody is taper water conservancy diversion packet header (9), exhaust box (1) structure from outside to inside is followed successively by perforated plate (4), woven wire (6), waterproof glass cloth (7) and inner acoustic absorbant (5) of filling, and the distance between the two rows exhaust box (1) is 50～100mm.
2. aircraft engine test stand exhaust muffling device according to claim 1 is characterized in that: the thickness of this exhaust box (1) is 400～600mm, and length is 12～16m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202761815U CN201594039U (en) | 2009-12-10 | 2009-12-10 | Aircraft engine test bed exhaust silencing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202761815U CN201594039U (en) | 2009-12-10 | 2009-12-10 | Aircraft engine test bed exhaust silencing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201594039U true CN201594039U (en) | 2010-09-29 |
Family
ID=42776107
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202761815U Expired - Fee Related CN201594039U (en) | 2009-12-10 | 2009-12-10 | Aircraft engine test bed exhaust silencing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201594039U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102155282A (en) * | 2011-03-31 | 2011-08-17 | 重庆长安汽车股份有限公司 | Sound-proofing heat-insulation exhaust pipe for engine pedestal |
| CN102401737A (en) * | 2011-08-26 | 2012-04-04 | 沈阳黎明航空发动机(集团)有限责任公司 | Spiral heat collection exhausting device for aircraft engine test bed |
| CN102829650A (en) * | 2012-07-20 | 2012-12-19 | 浙江东发环保工程有限公司 | Sound eliminating and noise lowering device of large-sized natural ventilation cooling tower in thermal power plant |
| CN103482079A (en) * | 2013-09-28 | 2014-01-01 | 李竟儒 | Facility for reducing taking-off and landing-on noise and tail gas pollution of flight |
| CN114459724A (en) * | 2022-04-14 | 2022-05-10 | 中国空气动力研究与发展中心高速空气动力研究所 | High-speed free jet wind tunnel noise control device |
-
2009
- 2009-12-10 CN CN2009202761815U patent/CN201594039U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102155282A (en) * | 2011-03-31 | 2011-08-17 | 重庆长安汽车股份有限公司 | Sound-proofing heat-insulation exhaust pipe for engine pedestal |
| CN102401737A (en) * | 2011-08-26 | 2012-04-04 | 沈阳黎明航空发动机(集团)有限责任公司 | Spiral heat collection exhausting device for aircraft engine test bed |
| CN102829650A (en) * | 2012-07-20 | 2012-12-19 | 浙江东发环保工程有限公司 | Sound eliminating and noise lowering device of large-sized natural ventilation cooling tower in thermal power plant |
| CN103482079A (en) * | 2013-09-28 | 2014-01-01 | 李竟儒 | Facility for reducing taking-off and landing-on noise and tail gas pollution of flight |
| CN114459724A (en) * | 2022-04-14 | 2022-05-10 | 中国空气动力研究与发展中心高速空气动力研究所 | High-speed free jet wind tunnel noise control device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201594039U (en) | Aircraft engine test bed exhaust silencing device | |
| CN202707182U (en) | Pressure reduction variable-frequency silencer | |
| CN106014545B (en) | A kind of engine muffler | |
| CN201218127Y (en) | Silencer | |
| CN101460713B (en) | Silencer for adsorption-based gas separation systems | |
| CN110242816B (en) | Silencer device for eliminating discrete high-frequency squeaking | |
| CN201536010U (en) | Sound absorption unit component and sound absorption unit comprising same | |
| CN109945680A (en) | Cooling tower with silencer | |
| CN213510798U (en) | Tail gas muffler convenient to installation | |
| CN202866936U (en) | Micropore muffler | |
| CN202261765U (en) | Low-frequency noise silencing box | |
| CN203394890U (en) | Composite chimney muffler | |
| CN209264278U (en) | A kind of closed noise reduction testing stand of brake valve | |
| CN106677860B (en) | A kind of silencing means for automobile exhaust pipe | |
| CN204572122U (en) | A kind of anti-spray formula baffler | |
| CN205639098U (en) | Wide band silencer | |
| CN201984808U (en) | Muffler matched with oxygen concentrator | |
| CN110410610A (en) | A kind of steam pipe muffler | |
| CN210516212U (en) | Multi-stage throttling and voltage-reducing impedance composite silencer device | |
| CN201981810U (en) | Wall surface sound-absorption structure of test room of high-speed centrifugal fan | |
| CN204490623U (en) | A kind of submersible aerator admission passage denoising device | |
| CN204783177U (en) | Diesel generating set silencer of discharging fume | |
| CN216487283U (en) | Impedance composite noise suppression structure for large-flow high-speed air duct | |
| CN2725362Y (en) | Noise reducing ventilution device of oceaneering well drilling platform | |
| CN204385639U (en) | A kind of foamed aluminium sound-absorbing muffler being arranged on sound barrier top and using |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: ZHONGHANG ENGINEERING AND EQUIPMENT INTEGRATION CO Effective date: 20120514 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20120514 Address after: 100011 Beijing Dewai Street No. 12 Co-patentee after: AVIC engineering Integrated Device Co., Ltd. Patentee after: China Aviation Planning and Construction Development Co., Ltd. Address before: 100011 Beijing Dewai Street No. 12 Patentee before: China Aviation Planning and Construction Development Co., Ltd. |
|
| C56 | Change in the name or address of the patentee | ||
| CP03 | Change of name, title or address |
Address after: 100011 Beijing Xicheng District Dewai Street No. 12 Patentee after: CHINA AVIATION PLANNING AND DESIGN INSTITUTE (GROUP) CO., LTD. Patentee after: AVIC engineering Integrated Device Co., Ltd. Address before: 100011 Beijing Dewai Street No. 12 Patentee before: China Aviation Planning and Construction Development Co., Ltd. Patentee before: AVIC engineering Integrated Device Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100929 Termination date: 20181210 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |