CN106289706B - The flow tunnel testing device of power transmission line wind noise - Google Patents
The flow tunnel testing device of power transmission line wind noise Download PDFInfo
- Publication number
- CN106289706B CN106289706B CN201610669497.5A CN201610669497A CN106289706B CN 106289706 B CN106289706 B CN 106289706B CN 201610669497 A CN201610669497 A CN 201610669497A CN 106289706 B CN106289706 B CN 106289706B
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- transmission line
- power transmission
- wind noise
- braced frame
- test specimen
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M9/00—Aerodynamic testing; Arrangements in or on wind tunnels
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H11/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties
- G01H11/06—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties by electric means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M9/00—Aerodynamic testing; Arrangements in or on wind tunnels
- G01M9/06—Measuring arrangements specially adapted for aerodynamic testing
Abstract
The invention discloses a kind of flow tunnel testing devices of power transmission line wind noise.Braced frame is disposed between the tunnel inlet and ducting outlet of anechoic room, before braced frame, two sides are disposed with two-dimensional flow end plate afterwards, two-dimensional flow end plate is fixed on a left side by locking device, on right support frame, before two-dimensional flow end plate, two sides are symmetrically provided with round test specimen fixation hole afterwards, power transmission line test specimen is installed and fixed in round test specimen fixation hole, arrange acoustic sensor to acquire power transmission line wind noise above or below power transmission line test specimen, acoustic sensor is installed in braced frame by sensor fixed link, the power transmission line wind noise of acoustic sensor acquisition passes through real-time dynamic data acquisition system acquisition and storage.The present invention can test the distinguished and admirable wind noise generated through power transmission line, realize that the power transmission line wind noise under artificial environment occurs and acquires, obtain the acoustic feature of power transmission line wind noise.
Description
Technical field
The present invention relates to the experimental rigs of noise, more particularly, to a kind of flow tunnel testing device of power transmission line wind noise.
Background technique
With the high speed development of electric system, overhead transmission line because have easy construction, for ease of maintenaince, adapt to a variety ofly
The advantage of shape and be widely applied.Along with the development of raising and the urbanization of voltage class, route can inevitably across
More populated area has been had become complained pair by environmental problem such as wind noise and corona noise that transmission line of electricity generates
As.China's specification has carried out series of studies just for corona noise at present, for power transmission line wind noise almost without research.
Power transmission line wind noise is mainly to be generated by wind around the de- sound source of the dipole formed in power transmission line surface whirlpool, with power transmission line
Material and vibration characteristics are unrelated, and related with the external surface shape of power transmission line, diameter and wind speed and direction etc..Wind tunnel test can be with people
Industry control arrives stream wind speed can be convenient the system test research for carrying out different model power transmission line wind noise, domestic at present not have needle
Wind- tunnel investigation was carried out to power transmission line wind noise.Therefore it is highly desirable the wind tunnel test dress of exploitation power transmission line wind noise
It sets.
Summary of the invention
The purpose of the present invention is to provide a kind of flow tunnel testing devices of power transmission line wind noise, can carry out different wind speed transmissions of electricity
The two-dimentional wind noise wind tunnel test of line needs to obtain the wind noise data of designated position in anechoic room according to experiment.It can be according to examination
Test the sound characteristic and wind friction velocity when result extracts the generation of power transmission line wind noise.
The technical solution adopted by the present invention to solve the technical problems is:
The present invention is disposed with braced frame between the tunnel inlet and ducting outlet of anechoic room, forward and backward in braced frame
Two sides are disposed with two-dimensional flow end plate, and two-dimensional flow end plate is fixed in left and right braced frame by locking device, in two-dimensional flow end plate
Front and rear sides be symmetrically provided with round test specimen fixation hole, power transmission line test specimen is installed and fixed in round test specimen fixation hole, defeated
Acoustic sensor is arranged above or below electric wire test specimen to acquire power transmission line wind noise, acoustic sensor is fixed by sensor
Bar is installed in braced frame, acoustic sensor acquisition power transmission line wind noise by real-time dynamic data acquisition system acquisition and
Storage.
There is locking device in the braced frame, select in braced frame left and right side or the upper and lower side of braced frame
Fixed two-dimensional flow end plate.
One acoustic sensor of the noise elimination indoor location installs multiple acoustic sensors formation sensor arrays simultaneously,
Multiple acoustic sensors are fixed on around power transmission line test specimen by adjusting sensor fixed link.
The two-dimensional flow end plate medial surface is pasted with sound absorption sponge.
The invention has the advantages that:
The present invention can test the distinguished and admirable wind noise generated through power transmission line, realize the power transmission line wind noise hair under artificial environment
Raw and acquisition, obtains the acoustic feature of power transmission line wind noise.
Detailed description of the invention
Fig. 1 is acoustic wind tunnel experimental rig schematic diagram of the invention.
In figure: 1, anechoic room, 2, tunnel inlet, 3, ducting outlet, 4, braced frame, 5, two-dimensional flow end plate, 6, locking dress
It sets, 7, round test specimen fixation hole, 8, power transmission line test specimen, 9, acoustic sensor, 10, power transmission line wind noise, 11, sensor fixes
Bar, 12, real-time dynamic data acquisition system.
Specific embodiment
Present invention will be further explained below with reference to the attached drawings and examples.
As shown in Figure 1, braced frame 4 is disposed between the tunnel inlet 2 and ducting outlet 3 of anechoic room 1, in support frame
4 front and rear sides of frame is disposed with two-dimensional flow end plate 5, and two-dimensional flow end plate 5 is fixed in left and right braced frame 4 by locking device 6,
It is symmetrically provided with round test specimen fixation hole 7 in the front and rear sides of two-dimensional flow end plate 5, is installed and fixed in round test specimen fixation hole 7
Power transmission line test specimen 8 arranges acoustic sensor 9 to acquire power transmission line wind noise 10, acoustics above or below power transmission line test specimen 8
Sensor 9 is installed in braced frame 4 by sensor fixed link 11, and the power transmission line wind noise 10 that acoustic sensor 9 acquires is logical
Cross 12 acquisition and storage of real-time dynamic data acquisition system.
There is locking device 6, selection is upper and lower in 4 left and right side of braced frame or braced frame 4 in the braced frame 4
Two-dimensional flow end plate 5 is fixed in side.
One acoustic sensor 9 is installed in the anechoic room 1 or multiple acoustic sensors 9 are installed simultaneously and forms sensor arrays
Multiple acoustic sensors 9, are fixed on around power transmission line test specimen 8 by column by adjusting sensor fixed link 11.
5 medial surface of two-dimensional flow end plate is pasted with sound absorption sponge.
There are many real-time dynamic data acquisition system 12, and careless dynamic data collection system is all available, such as use A/D
Data acquisition board, PC machine and self-editing signal acquisition and data processing software composition.
Embodiment:
Now illustrate the application method of the present apparatus by taking certain flow tunnel testing device and test process as an example.
As shown in Figure 1, test process is as follows:
1) it is placed between the tunnel inlet 2 and ducting outlet 3 in Zhejiang University ZD-2 acoustic wind tunnel test section anechoic room 1
Braced frame 4, in braced frame 4 left and right sides arrange two-dimensional flow end plate 5, inside be pasted with sound absorption sponge, two-dimensional flow
End plate 5 is close to tunnel inlet 2 to form two-dimentional air-flow, is fixed two-dimensional flow end plate 5 by 4 locking devices 6；
2) center of the opened round test specimen fixation hole 7 on two-dimensional flow end plate 5, round test specimen fixation hole 7 is located at tunnel inlet 2
Vertically on the intersection point of 5 horizontal direction perpendicular bisector of perpendicular bisector and two-dimensional flow end plate, and power transmission line test specimen 8 is fixed, is adopted in the present embodiment
With LGJ300/25 conducting wire；
3) position shown in Fig. 1 of acoustic sensor 9 is arranged by sensor fixed link 11, acoustic sensor 9 uses sound
Pressure sensor, inductive head are located at LGJ300/25 conducting wire right above the center of 5 inner part of two-dimensional flow end plate at 83.5cm；
4) measurement of 12 Control experiment wind speed of real-time dynamic data acquisition system and acoustic pressure, the test wind are 5m/s ~ 30m/
S, mono- grade of every 5m/s, acoustic sensor 9 acquires the acoustic pressure time-histories of 20s and is stored under each wind speed after wind speed is stablized, and passes through
Frequency-domain analysis obtains the phases such as the noise sound of LGJ300/25 conducting wire under each wind speed, excellent frequency, third-octave sound pressure level
Close acoustic feature.By the above process, power transmission line two-dimentional wind noise characteristic acoustic wind tunnel test at different wind speeds is realized.
Above-mentioned specific embodiment is used to illustrate the present invention, rather than limits the invention, in spirit of the invention
In claims, to any modifications and changes that the present invention makes, protection scope of the present invention is both fallen within.
Claims (3)
1. a kind of flow tunnel testing device of power transmission line wind noise, it is characterised in that: tunnel inlet (2) and wind in anechoic room (1)
Braced frame (4) are disposed between road outlet (3), front and rear sides is disposed with two-dimensional flow end plate (5) in braced frame (4), two dimension
Stream end plate (5) is fixed on left and right braced frame (4) by locking device (6), the front and rear sides pair in two-dimensional flow end plate (5)
Title is provided with round test specimen fixation hole (7), power transmission line test specimen (8) is installed and fixed in round test specimen fixation hole (7), in power transmission line
Acoustic sensor (9) are arranged above or below test specimen (8) to acquire power transmission line wind noise (10), acoustic sensor (9) passes through
Sensor fixed link (11) is installed on braced frame (4), and the power transmission line wind noise (10) of acoustic sensor (9) acquisition passes through reality
When dynamic data collection system (12) acquisition and storage；
There are locking device (6) on the braced frame (4), select in braced frame (4) left and right side or braced frame (4)
Upper and lower side is fixed two-dimensional flow end plate (5).
2. a kind of flow tunnel testing device of power transmission line wind noise according to claim 1, it is characterised in that: the anechoic room
(1) acoustic sensor (9) is installed in or multiple acoustic sensors (9) are installed simultaneously and forms sensor array, by adjusting
Multiple acoustic sensors (9) are fixed on around power transmission line test specimen (8) by sensor fixed link (11).
3. a kind of flow tunnel testing device of power transmission line wind noise according to claim 1, it is characterised in that: the two-dimensional flow
End plate (5) medial surface is pasted with sound absorption sponge.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610669497.5A CN106289706B (en) | 2016-08-15 | 2016-08-15 | The flow tunnel testing device of power transmission line wind noise |
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| CN201610669497.5A CN106289706B (en) | 2016-08-15 | 2016-08-15 | The flow tunnel testing device of power transmission line wind noise |
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| CN106289706A CN106289706A (en) | 2017-01-04 |
| CN106289706B true CN106289706B (en) | 2018-12-04 |
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| CN107063446A (en) * | 2017-05-19 | 2017-08-18 | 国网辽宁省电力有限公司电力科学研究院 | Transmission circuit insulator string wind noise attribute testing test device and method |
| CN107894319A (en) * | 2017-12-29 | 2018-04-10 | 中国能源建设集团浙江省电力设计院有限公司 | A kind of test device of round steel pipe bar Shape Coefficient |
| CN110320000A (en) * | 2018-03-29 | 2019-10-11 | 中国人民解放军海军工程大学 | Installation device of sensor is used in a kind of test of acoustic wind tunnel |
| GB201901066D0 (en) * | 2019-01-25 | 2019-03-13 | Nicoventures Trading Ltd | Aerosol generating apparatus, aerosol generating article and method of determining data associated with an aerosol generating article |
| CN111640412B (en) * | 2020-05-29 | 2023-07-18 | 扬州大学 | Noise reduction processing method for air suction type direct-current low-speed wind tunnel |
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| JP2000275137A (en) * | 1999-03-25 | 2000-10-06 | Sumitomo Heavy Ind Ltd | Attenuation addition apparatus for wind tunnel test |
| JP4748680B2 (en) * | 2006-07-13 | 2011-08-17 | 公益財団法人鉄道総合技術研究所 | Sound source exploration device and wind tunnel testing device |
| WO2010063660A2 (en) * | 2008-12-05 | 2010-06-10 | Audioasics A/S | Wind noise detection method and system |
| CN103278306B (en) * | 2013-04-16 | 2016-02-10 | 新疆电力公司 | Anti-wind capability detection method, device and composite insulator method for making |
| CN204044353U (en) * | 2014-09-20 | 2014-12-24 | 中国航空工业空气动力研究院 | Closed Tunnel acoustic experiment noise source oriented array |
| CN104596727A (en) * | 2014-12-08 | 2015-05-06 | 华北电力大学 | High-voltage transmission conductor aerodynamic characteristic experiment device with artificial rivulet |
| CN105676182A (en) * | 2016-02-26 | 2016-06-15 | 南方电网科学研究院有限责任公司 | Positioning method and system for wind noise source |
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