CN104314189B - A kind of rotor noise tests whole elimination room - Google Patents
A kind of rotor noise tests whole elimination room Download PDFInfo
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- CN104314189B CN104314189B CN201410424690.3A CN201410424690A CN104314189B CN 104314189 B CN104314189 B CN 104314189B CN 201410424690 A CN201410424690 A CN 201410424690A CN 104314189 B CN104314189 B CN 104314189B
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- road junction
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Abstract
A kind of rotor noise tests whole elimination room, belongs to lifting airscrew experimental technique field, it is characterised in that anechoic room top is provided with air inlet road junction, and bottom is provided with exhaust road junction, and Rotor Test stand is fixed on exhaust duct center, stretches into anechoic room.The air inlet road junction and exhaust road junction are annular.Air intake duct and exhaust duct inwall installation the sound absorption lining.The air inlet road junction and exhaust road junction are evenly equipped with circular cylindrical array type silencer.The rotor centers are located at the center of anechoic room height.The anechoic room air inlet road junction and exhaust road junction silencer and air intake duct, exhaust duct sound absorption lining use metal surface.Unlike conventional whole elimination room, there is provided the gas channel for allowing large flow-rate gas stream to pass through, and effectively noise elimination, sound insulation means are taken gas channel, make formation sound free field in anechoic room, the noise that leaks meets environmental requirement.Inside set high-power rotor model.test system, it is allowed to run large-size rotor, noise testing scope is wider, and effect is good.
Description
Technical field
The invention belongs to lifting airscrew experimental technique field, and in particular to a kind of rotor noise tests whole elimination room.
Background technology
Anechoic room is a kind of special audio acoustic fundamental test room for being specifically designed manufacture.In order to accurately measure sound source
Characteristic, sound source should be placed on an ideal space not interfered with, such space is referred to as " free found field ", and people build indoors
Approximate free found field is found, here it is " anechoic room ".
Noise elimination chamber shape is mostly square or rectangle.Anechoic room generally use full-closed structure, by set soundproof door with
Disengaging.
It is in the prior art 200910046035.8 in number of patent application, patent name：Ultra-low background noise whole elimination room,
The applying date：2009.2.10 it is on the books in document.
Rotor noise experiment anechoic room is the test facilities for carrying out rotor noise experimental test.Rotor noise experiment is tested
Main body is helicopter model rotor system, and rotor system need to be arranged on Rotor Test stand and be tested.Common totally disappeared sound
Room all sets sound-absorbing material due to internal, it is impossible to heavy high-power test stand is supported, in addition, carrying out Rotor Test
When, the air-flow of big flow, if anechoic room is closure designs, can produce the reflux of air-flow by rotor disk in anechoic room
With pressure fluctuation phenomenon, so as to influence the test effect of Rotor Test.For these reasons, rotor noise laboratory anechoic room
Configuration must simultaneously meet Airflow Environment requirement and the noise testing demand of Rotor Test.
The content of the invention
The purpose of the present invention：
Design a kind of whole elimination room for being available for lifting airscrew noise testing.It can both meet rotor by configuration design
The acoustic enviroment requirement of noise testing, while meet that rotor operates the requirement to air circulation.
Technical scheme：
The object of the present invention is achieved like this：
A kind of rotor noise tests whole elimination room, it is characterised in that anechoic room top is provided with air inlet road junction, and bottom is provided with row
Gas port, Rotor Test stand are fixed on exhaust duct center, stretch into anechoic room.
The air inlet road junction and exhaust road junction are annular.
Air intake duct and exhaust duct inwall installation the sound absorption lining.
The air inlet road junction and exhaust road junction are evenly equipped with circular cylindrical array type silencer.
The rotor centers are located at the center of anechoic room height.
The anechoic room air inlet road junction and exhaust road junction silencer and air intake duct, exhaust duct sound absorption lining use metal watch
Face.
Anechoic room periphery is closed by Sound insulation for building structure, to reach sound insulation purpose.Anechoic room is supported by vibration isolation elastic construction
In in out-building, vibration isolation elastic construction is used to completely cut off extraneous vibration interference seat.Anechoic room top is provided with circular air inlet road junction, disappears
Sound chamber bottom is provided with circular row gas port, inlet and outlet road inwall installation sound absorption lining, reduces noise reflection in passage.Inlet and outlet
Road junction is evenly equipped with circular cylindrical array type silencer, in ensureing that air-flow completely cuts off outside noise interference and prevented on the premise of
Portion's noise leaks.The air total flow that runner passes through is more than rotor lift flow, will not produce and backflow and pressure fluctuation phenomenon.Examination
In testing when the throughput that gas channel passes through reaches 200m3/s, the pressure loss of silencer is not more than 3pa.High-power rotor
Test-bed is fixed on exhaust duct center by reinforced concrete upright column support, and rotor centers are located at the centre bit of anechoic room height
Put, be advantageous to arrange microphone everywhere around it, to meet different testing requirements.Anechoic room wedge, inlet and outlet road junction disappear
The silencing equipment such as sound device and inlet and outlet road sound absorption lining uses metal surface, in the environment of Rotor Test, there is best resist
Gas shock ability.
The key point of the present invention：
Key point 1：A kind of rotor noise tests whole elimination room, and noise elimination cell structure is different from conventional hermetic whole elimination room,
Anechoic room is provided with air intake duct and exhaust duct, is the incomplete envelope with air flow passage specially designed for rotor noise test
The whole elimination room closed.
Key point 2：A kind of rotor noise tests whole elimination room, and inlet and outlet road junction is furnished with circular cylindrical array type silencer,
Allow air-flow by while effectively completely cut off outside noise disturb and prevent internal noise from leaking.
Key point 3：A kind of rotor noise tests whole elimination room, fixes high-power rotor model.test system in anechoic room, can carry out 4
Rice diameter Rotor Test.
Key point 4：A kind of rotor noise tests whole elimination room, and silencing equipment surface is metal material, with common textile
The silencing equipments such as material surface wedge are compared, and in the environment of Rotor Test, there is best gas shock resistance, and with U.S.
The advantages that seeing, be environmentally friendly, preventing fires and be easy to clean.
Beneficial effects of the present invention：
A kind of whole elimination room of suitable rotor noise experiment, unlike conventional whole elimination room, there is provided allow big stream
The gas channel that amount air-flow passes through, and effectively noise elimination, sound insulation means are taken gas channel, make formation sound in anechoic room free
, the noise that leaks meets environmental requirement.Inside set high-power rotor model.test system, it is allowed to run large-size rotor, noise testing model
Enclose more extensively, effect is good.
Brief description of the drawings
Fig. 1 is the structural representation of the invention
1- intake muffler 2- air intake duct 3- Sound insulation for building structure 4- anechoic room 5- rotor model.test system 6- vibration isolation elasticity
Structure 7- exhaust duct 8- reinforced concrete upright column 9- exhaust silencers
Embodiment
Refering to accompanying drawing 1, the present invention forms outer layer sound insulation building by Sound insulation for building structure 3, make extraneous sound source air-borne sound and
Solid-borne sound transmission is effectively isolated, and forms the indoor environment compared with low noise.Anechoic room 4 is supported in building by vibration isolation elastic construction 6
Inside sound insulating structure 3, noise elimination interior side wall wall arranges wedge absorber.The top of anechoic room 4 is provided with circular air inlet road junction 2, eliminates the noise
Room bottom is provided with circular row gas port 7, inlet and outlet road inwall installation sound absorption lining, reduces noise reflection in passage.Air inlet road junction
Top is furnished with circular cylindrical array type silencer 1, and exhaust is furnished with circular cylindrical array type silencer 9 below road junction, is ensureing gas
Stream completely cuts off outside noise interference and prevents internal noise from leaking on the premise of passing through.The air total flow that runner passes through is more than rotor
Lift flow, it will not produce and backflow and pressure fluctuation phenomenon.
High-power rotor model.test system 5 is fixed on exhaust duct center by the support of reinforced concrete upright column 8, and rotor centers, which are located at, to disappear
The center of sound chamber's height.
Claims (5)
1. a kind of rotor noise tests whole elimination room, it is characterised in that anechoic room top is provided with air inlet road junction, and bottom is provided with exhaust
Road junction, Rotor Test stand are fixed on exhaust duct center, stretch into anechoic room, and rotor centers are located in anechoic room height
Heart position.
2. rotor noise according to claim 1 tests whole elimination room, the air inlet road junction and exhaust road junction are annular.
3. rotor noise according to claim 1 tests whole elimination room, air intake duct and exhaust duct inwall the installation sound absorption
Lining.
4. rotor noise according to claim 1 tests whole elimination room, the air inlet road junction and exhaust road junction are evenly equipped with ring
Shape columnar arrays formula silencer.
5. rotor noise according to claim 1 tests whole elimination room, the anechoic room air inlet road junction and exhaust road junction disappear
Sound device and air intake duct, exhaust duct sound absorption lining use metal surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410424690.3A CN104314189B (en) | 2014-08-26 | 2014-08-26 | A kind of rotor noise tests whole elimination room |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410424690.3A CN104314189B (en) | 2014-08-26 | 2014-08-26 | A kind of rotor noise tests whole elimination room |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104314189A CN104314189A (en) | 2015-01-28 |
| CN104314189B true CN104314189B (en) | 2017-12-29 |
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ID=52369490
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410424690.3A Active CN104314189B (en) | 2014-08-26 | 2014-08-26 | A kind of rotor noise tests whole elimination room |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105092204A (en) * | 2015-07-24 | 2015-11-25 | 南京航空航天大学 | Apparatus used for helicopter rotor blade-vortex interference noise experiment |
| CN106996204B (en) * | 2017-05-04 | 2019-09-06 | 中国航发沈阳发动机研究所 | A kind of anechoic room for fan forced grade aerodynamic noise test |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1666251A (en) * | 2002-04-26 | 2005-09-07 | 出光兴产株式会社 | Sound absorbing body, sound absorbing structure, and method for manufacturing sound absorbing structure |
| RU2275476C1 (en) * | 2005-03-24 | 2006-04-27 | Государственное Унитарное Предприятие "Водоканал Санкт-Петербурга" | Noise-protective structure |
| CN201162278Y (en) * | 2008-03-07 | 2008-12-10 | 蓝军 | Audiometric laboratory |
| CN201202185Y (en) * | 2008-05-14 | 2009-03-04 | 鹤壁市绿色环保生产有限公司 | Efficient sound control room |
| CN101644476A (en) * | 2008-08-05 | 2010-02-10 | 株式会社海广 | Exhaust system of dust free room and construction method thereof |
-
2014
- 2014-08-26 CN CN201410424690.3A patent/CN104314189B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1666251A (en) * | 2002-04-26 | 2005-09-07 | 出光兴产株式会社 | Sound absorbing body, sound absorbing structure, and method for manufacturing sound absorbing structure |
| RU2275476C1 (en) * | 2005-03-24 | 2006-04-27 | Государственное Унитарное Предприятие "Водоканал Санкт-Петербурга" | Noise-protective structure |
| CN201162278Y (en) * | 2008-03-07 | 2008-12-10 | 蓝军 | Audiometric laboratory |
| CN201202185Y (en) * | 2008-05-14 | 2009-03-04 | 鹤壁市绿色环保生产有限公司 | Efficient sound control room |
| CN101644476A (en) * | 2008-08-05 | 2010-02-10 | 株式会社海广 | Exhaust system of dust free room and construction method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104314189A (en) | 2015-01-28 |
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