CN205723070U - A kind of indoor transformer ventilation denoising device - Google Patents
A kind of indoor transformer ventilation denoising device Download PDFInfo
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- CN205723070U CN205723070U CN201620156495.1U CN201620156495U CN205723070U CN 205723070 U CN205723070 U CN 205723070U CN 201620156495 U CN201620156495 U CN 201620156495U CN 205723070 U CN205723070 U CN 205723070U
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- 238000009423 ventilation Methods 0.000 title claims abstract description 61
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- 238000009434 installation Methods 0.000 claims description 6
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- 230000003287 optical effect Effects 0.000 claims description 4
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- 230000000875 corresponding effect Effects 0.000 description 18
- 230000001276 controlling effect Effects 0.000 description 6
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- 238000010586 diagram Methods 0.000 description 5
- 230000004888 barrier function Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000003044 adaptive effect Effects 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 241000208340 Araliaceae Species 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
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- 230000002596 correlated effect Effects 0.000 description 1
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- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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- 230000003584 silencer Effects 0.000 description 1
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Abstract
A kind of indoor transformer ventilation denoising device, comprising: ventilation shutter and propeller fan, is used for ventilation and heat, it is ensured that the safe and stable operation of indoor transformer；It for the multichannel active control system of ventilation shutter, is installed on outside ventilation shutter；It for single channel or the multichannel active control system of propeller fan, is installed on outside propeller fan.Ventilation shutter and propeller fan ensure that the ventilation and heat of indoor transformer, and active guidance system inhibits indoor transformer from ventilation and heat passage to extraradial noise.
Description
Technical field
The utility model belongs to indoor transformer technical field, belongs to environmental engineering speciality noise abatement skill
Art field, particularly to a kind of indoor transformer ventilation denoising device.
Background technology
With social development, power load is continuously increased, and newly-increased many transformer stations, have build residential block in
Near；On the other hand, urban sprawl, newly-built many residential quarters around the backland transformer station in original place.Cause
This, transformer station is increasingly nearer with residential block distance, and resident is by transformer station's influence of noise pollution.
Outdoor transformer is frequently used the tradition sound insulation such as sound barrier, half acoustic hood, sound absorption technique carries out noise and controls
Reason, in residential block apart from close in the case of, for reaching correlated noise limitation standard, difficulty very greatly and is brought
Other problems.For example, build very high sound barrier, daylighting and the ventilation of neighbouring residential building may be affected,
Needed for the steel construction of barrier, cost is very high, etc..
For noise is greatly lowered, transformer station also usually builds house, is placed on transformer in closing space,
Namely it is placed on indoor.But this can affect the ventilation and heat of transformer, transformer exists fragile and then makes
Become the risk of electric power system fault.Based on this, it is necessary to provide a kind of ventilation noise reduction for indoor transformer
Device.
Utility model content
The purpose of this utility model provides a kind of indoor transformer ventilation denoising device, it is to avoid in prior art
The ventilation and heat affecting transformer, transformer there is the fragile risk in turn resulting in electric power system fault
Defect.
In order to overcome deficiency of the prior art, the utility model provides a kind of indoor transformer ventilation noise reduction
The solution of device, specific as follows:
A kind of indoor transformer ventilation denoising device, the ventilation shutter being positioned in body of wall perforate, axial flow ventilate
Machine, is used for ventilation and heat, it is ensured that the safe and stable operation of indoor transformer；
It is positioned at the first active guidance system outside ventilation shutter, be used for reducing indoor transformer from ventilation hundred
Leaf window is to extraradial noise；
It is positioned at the second active guidance system outside propeller fan, be used for reducing indoor transformer and lead to from axial flow
Blower ventilation mouth is to extraradial noise, and propeller fan itself is to extraradial noise.
Described first active guidance system and the second active guidance system all each include active controller, signal
Conditioner, power amplifier, optional reference microphone, error microphone and control sound source；
Described with reference to microphone pick noise generation reference signal, reference signal amplifies filtering through signal conditioner
After be transferred to active controller；
Described error microphone acquisition noise produces error signal, and error signal amplifies filtering through signal conditioner
After be transferred to active controller；
Described active controller produces control signal based on reference signal and error signal, and control signal is through power
Amplifier is transferred to control sound source after amplifying, control sound source sends counteracting noise according to the control signal after amplification
Sound；
The principle that described active controller produces control signal is to make sound pressure amplitude square at error microphone
Little.
Described first active guidance system is multichannel active control system, and the control sound source that it comprises is being ventilated
Being uniformly distributed installation on window blind hatch face, the adjacent spacing between control sound source is dcc1, dcc1Less than desire
The half of the highest frequency corresponding wavelength of the noise frequency range effectively controlling with this active guidance system；
Described first active guidance system, the error microphone number that it comprises is identical with control sound source number,
And position one_to_one corresponding, it is arranged on outside control sound source, each error microphone and corresponding control sound source sound
The line at center is perpendicular to ventilation shutter facade, each error microphone and the corresponding control sound source acoustic centre of source
Distance dce1Equal；
Described first active guidance system, it optionally comprises a reference microphone, is arranged on control sound source
Inner side, near ventilation shutter, it is possible to be arranged in ventilation shutter；
Described first active guidance system, in the case of not comprising with reference to microphone, inside active controller
Generate 100Hz and harmonic signal thereof the reference signal as transformer noise.
Described second active guidance system is single channel or multichannel active control system；
If described second active guidance system single channel active guidance system, the control sound source that it comprises is at axle
The centre of flow blow place metope hole opening surface or edge are installed；
If described second active guidance system multichannel active control system, the control sound source that it comprises is at axle
Being uniformly distributed installation on the metope hole opening surface of flow blow place, the adjacent spacing between control sound source is
dcc2, dcc2Less than the highest frequency corresponding wavelength being intended to the noise frequency range effectively controlling with this active guidance system
Half；
Described second active guidance system, the error microphone number that it comprises is identical with control sound source number,
Position one_to_one corresponding, is arranged on outside control sound source, and each error microphone controls in sound source sound with corresponding
The line of the heart is perpendicular to propeller fan place body of wall facade, each error microphone and corresponding control sound source
Distance d of the acoustic centre of sourcece2Equal；
Described second active guidance system, it optionally comprises a reference microphone, is arranged on control sound source
Inner side, near propeller fan；
Described second active guidance system, in the case of not comprising with reference to microphone, inside active controller
Generate 100Hz and harmonic signal thereof the reference signal as transformer noise；
Described second active guidance system, do not comprise with reference to microphone in the case of, use optical sensor or
Speed probe gathers the ginseng as noise of axial flow fan for the propeller fan tach signal as reference sensor
Examine signal.
The beneficial effects of the utility model are: (1) ventilation shutter provides for indoor transformer with axial flow blower
Good ventilation and heat function；(2) active noise reduction system effectively reduces indoor transformer from ventilation shutter
With propeller fan ventilating opening to extraradial noise, and propeller fan itself is made an uproar to extraradial low frequency
Sound, compared with traditional passive noise reduction technology such as silencer, noise elimination blinds, system bulk is little, to transformer
Low-frequency noise excellent noise reduction effect；(3) ventilation denoising device is not arranged on the door in room, transformer place
Hole or near, do not affect staff's inspection and the maintenance of transformer；(4) each device of active guidance system is equal
Being positioned over inside body of wall perforate, being affected by outdoor environment little, security of system, robustness are high.
Brief description
Fig. 1 is the schematic diagram of indoor transformer ventilation denoising device of the present utility model.
The structural representation of the first active guidance system that Fig. 2 provides for the utility model.
The structural representation of the second active guidance system that Fig. 3 provides for the utility model.
Fig. 4 (makes for the control flow schematic diagram of the first and second active guidance systems that the utility model provides
With with reference to microphone pick reference signal).
Fig. 5 (uses active for the control flow schematic diagram of the first active guidance system that the utility model provides
Controller is internally generated 100Hz and harmonic signal thereof the reference signal as transformer noise).
Fig. 6 (uses active for the control flow schematic diagram of the second active guidance system that the utility model provides
Controller is internally generated 100Hz and harmonic signal thereof the reference signal as transformer noise, and makes to use up
Sensor or speed probe gather propeller fan tach signal as axial flow blower as reference sensor
The reference signal of noise).
Detailed description of the invention
With embodiment, utility model content is described further below in conjunction with the accompanying drawings, it is clear that described reality
Executing example is only a part of embodiment of the utility model, rather than whole embodiments.Based on the utility model
In embodiment, it is all that those of ordinary skill in the art are obtained under the premise of not making creative work
Other embodiments, broadly fall into the utility model protection scope:
With reference to shown in Fig. 1-Fig. 6, indoor transformer ventilation denoising device includes:
The ventilation shutter being positioned in body of wall perforate the 2nd, propeller fan 3, are used for ventilation and heat, it is ensured that indoor
The safe and stable operation of transformer 1；
It is positioned at the first active guidance system 4 outside ventilation shutter, be used for reducing indoor transformer from ventilation hundred
Leaf window is to extraradial noise；
It is positioned at the second active guidance system 5 outside propeller fan, be used for reducing indoor transformer from ventilation blower
Ventilating opening is to extraradial noise, and propeller fan itself is to extraradial noise.
For room, transformer place, ventilation shutter is air intake passage, and propeller fan ventilating opening is air-out
Passage, gate is closed at ordinary times, only uses when maintenance, inspection transformer.Owing to gate is closed, at ordinary times just
When often using, transformer noise is mainly radiate by ventilation shutter and propeller fan ventilating opening, can use
First active guidance system and the second active guidance system are controlled.
First active guidance system is as in figure 2 it is shown, include active controller the 401st, signal conditioner the 402nd, work(
Rate amplifier the 403rd, optional reference microphone the 404th, error microphone 406 and control sound source 405.Control
Sound source 405 is uniformly distributed installation on ventilation shutter opening surface, and the adjacent spacing between control sound source is
dcc1, dcc1Less than the highest frequency corresponding wavelength being intended to the noise frequency range effectively controlling with this active guidance system
Half.Error microphone 406 number is identical with control sound source 405 number, and position one_to_one corresponding is installed
Outside control sound source 405, each error microphone 406 and the corresponding company controlling sound source 405 acoustic centre of source
Line is perpendicular to ventilation shutter facade, each error microphone 406 and corresponding control sound source 405 acoustic centre of source
Distance dce1Equal；Optional being arranged on reference to microphone 404 controls inside sound source 405, near ventilation
Shutter, it is possible to be arranged in ventilation shutter；In the case of not using with reference to microphone 404, active
Controller 401 is internally generated 100Hz and harmonic signal thereof the reference signal as transformer noise.
In the present embodiment, a width of 1.50m of ventilation shutter, a height of 1.80m, it is intended to this Active control system
The highest frequency of the noise frequency range that system effectively controls is set to fmax=300Hz, uses 3 row 4 row totally 12
Control sound source 405 be evenly distributed on ventilation shutter opening surface, between adjacent control sound source 405 between
Away from being set to dcc1=0.5m, less than the half-wavelength of 300Hz.Error microphone 406 and corresponding control sound
Distance d of source 405 acoustic centre of sourcece1=0.10m, distance will not be too little, it is ensured that control sound source output will not be too little
Affecting noise reduction, distance is also less big, it is ensured that the stability of control system.Use one with reference to microphone
It is positioned in ventilation shutter, gather transformer noise as reference signal.As an alternative, it is possible to no
Use reference microphone, the 100Hz that use active controller 401 is internally generated and harmonic signal conduct thereof
The reference signal of transformer noise.
Second active guidance system is as it is shown on figure 3, include active controller the 501st, signal conditioner the 502nd, work(
Rate amplifier the 503rd, optional reference microphone the 504th, error microphone 506 and control sound source 505.Second
Active guidance system is single channel or multichannel active control system, if single channel active guidance system, its
The control sound source 505 comprising is installed in the centre of propeller fan place metope hole opening surface or edge；If
For multichannel active control system, control sound source 505 is equal on the metope hole opening surface of propeller fan place
Even distributing installation, the adjacent spacing between control sound source is dcc2, dcc2It is less than and be intended to use this active guidance system
The half of the highest frequency corresponding wavelength of the noise frequency range effectively controlling.Error microphone 506 number and control
Sound source 505 number processed is identical, position one_to_one corresponding, is arranged on outside control sound source 505, and each error passes
It is vertical that sound device 506 and the line of corresponding control sound source 505 acoustic centre of source are perpendicular to propeller fan place body of wall
Face, each error microphone 506 and corresponding distance d controlling sound source 505 acoustic centre of sourcece2Equal；Optional
Reference microphone 504 be arranged on inside control sound source 505, near propeller fan；Do not using reference
In the case of microphone 504, active controller 501 is internally generated 100Hz and harmonic signal thereof as change
The reference signal of depressor noise, and use optical sensor or speed probe to gather axial flow as reference sensor
Ventilation blower tach signal is as the reference signal of noise of axial flow fan.
In the present embodiment, a diameter of 0.90m of propeller fan place metope hole opening surface, it is intended to have with this
The highest frequency of the noise frequency range that source control system effectively controls is fmax=300Hz, 4 controls of use
Sound source 505 is uniformly distributed, adjacent spacing d between control sound source 505cc2=0.5m, error microphone
506 with corresponding control sound source 505 acoustic centre of source distance dce2=0.10m, uses one with reference to microphone 504
Place and the opening surface center of circle, close proximity to the fan of axial flow blower, pick up reference signal.As an alternative,
Also reference microphone, the 100Hz that use active controller 401 is internally generated and harmonic wave letter thereof can not be used
Number as the reference signal of transformer noise, a speed probe is used to gather rotation speed of the fan, according to fan
The number of blade is converted into fan noise fundamental frequency and harmonic frequency thereof, can generate the reference signal of fan noise.This reality
Execute in the described first kind and second active guidance system of mode, described with reference to the generation of microphone pick noise
Reference signal, reference signal is transferred to active controller after signal conditioner amplification filtering；Described error passes
Sound device acquisition noise produces error signal, and error signal is transferred to active control after signal conditioner amplification filtering
Device processed；Described active controller produces control signal based on reference signal and error signal, and control signal is through work(
Rate amplifier is transferred to control sound source after amplifying, control sound source sends counteracting according to the control signal after amplification and makes an uproar
The sound of sound；The principle that described active controller produces control signal is the sound pressure amplitude making at error microphone
Square minimum, Active control algorithm can use feedforward multichannel/single channel adaptive control algorithm, this enforcement
Example uses has, on current textbook, the feedforward multichannel/single channel adaptive control algorithm being discussed in detail.
When selecting with reference to microphone pickup reference signal, the first and second active controls of this ventilation denoising device
The control flow schematic diagram of system processed sees Fig. 4:
Step 100, by with reference to microphone pick reference signal；
Step 200, by each error microphone Acquisition Error signal；
Step 300, the reference signal collecting and error signal are filtered amplifying by signal conditioner；
Step 400, active controller is put down according to the sound pressure amplitude making at error microphone according to the signal after conditioning
Side's minimum principle generates control signal；
Step 500, control signal is amplified by power amplifier；
Step 600, controls the control signal after sound source sends amplification, is controlled sound field.
It is positioned at the first active guidance system outside ventilation shutter in the case of not using with reference to microphone,
Active controller can be used to be internally generated 100Hz and harmonic signal thereof the reference letter as transformer noise
Number, control flow sees Fig. 5.
It is positioned at the second active guidance system outside propeller fan, in the case of not using with reference to microphone,
Active controller can be used to be internally generated 100Hz and harmonic signal thereof the reference letter as transformer noise
Number, and use optical sensor or speed probe to gather propeller fan tach signal work as reference sensor
For the reference signal of noise of axial flow fan, control flow sees Fig. 6.
The above, be only preferred embodiment of the present utility model, not makees the utility model any
Pro forma restriction, although the utility model is disclosed above with preferred embodiment, but is not limited to
The utility model, any those skilled in the art, without departing from technical solutions of the utility model scope
In, when the technology contents of available the disclosure above makes a little equivalence enforcement changing or be modified to equivalent variations
Example, as long as being without departing from technical solutions of the utility model content, according to technical spirit of the present utility model,
Within spirit of the present utility model and principle, any simple modification that above example is made, equivalent replace
Change and improvement etc., all still fall within the protection domain of technical solutions of the utility model.
Claims (4)
1. an indoor transformer ventilation denoising device, it is characterised in that include:
The ventilation shutter that is positioned in body of wall perforate, propeller fan, be used for ventilation and heat, it is ensured that indoor change
The safe and stable operation of depressor；
It is positioned at the first active guidance system outside ventilation shutter, be used for reducing indoor transformer from ventilation shutter to extraradial noise；
It is positioned at the second active guidance system outside propeller fan, be used for reducing indoor transformer from propeller fan ventilating opening to extraradial noise, and propeller fan itself is to extraradial noise.
2. ventilation denoising device according to claim 1, it is characterised in that:
Described first active guidance system and the second active guidance system all each include active controller, signal conditioner, power amplifier, reference microphone, error microphone and control sound source；
Described with reference to microphone pick noise generation reference signal, reference signal is transferred to active controller after signal conditioner amplification filtering；
Described error microphone acquisition noise produces error signal, and error signal is transferred to active controller after signal conditioner amplification filtering；
Described active controller produces control signal based on reference signal and error signal, and control signal is transferred to control sound source after power amplifier amplification, and control sound source sends the sound offsetting noise according to the control signal after amplification；
The principle that described active controller produces control signal is the sound pressure amplitude square minimum making at error microphone.
3. ventilation denoising device according to claim 2, it is characterised in that:
Described first active guidance system is multichannel active control system, and the control sound source that it comprises is uniformly distributed installation on ventilation shutter opening surface, and the adjacent spacing between control sound source is dcc1, dcc1Half less than the highest frequency corresponding wavelength being intended to the noise frequency range effectively controlling with this active guidance system；
Described first active guidance system, the error microphone number that it comprises is identical with control sound source number, position one_to_one corresponding, it is arranged on outside control sound source, each error microphone is perpendicular to ventilation shutter facade, each error microphone and corresponding distance d controlling the sound source acoustic centre of source with the line of the corresponding control sound source acoustic centre of sourcece1Equal；
Described first active guidance system, it comprises a reference microphone, is arranged on inside control sound source, near ventilation shutter, is also mounted in ventilation shutter；
Described first active guidance system, in the case of not comprising with reference to microphone, active controller is internally generated 100Hz and harmonic signal thereof the reference signal as transformer noise.
4. ventilation denoising device according to claim 2, it is characterised in that:
Described second active guidance system is single channel or multichannel active control system；
If described second active guidance system single channel active guidance system, the control sound source that it comprises is installed in the centre of propeller fan place metope hole opening surface or edge；
If described second active guidance system multichannel active control system, the control sound source that it comprises is uniformly distributed installation on the metope hole opening surface of propeller fan place, and the adjacent spacing between control sound source is dcc2, dcc2Half less than the highest frequency corresponding wavelength being intended to the noise frequency range effectively controlling with this active guidance system；
Described second active guidance system, the error microphone number that it comprises is identical with control sound source number, position one_to_one corresponding, it is arranged on outside control sound source, each error microphone is perpendicular to propeller fan place body of wall facade, each error microphone and corresponding distance d controlling the sound source acoustic centre of source with the line of the corresponding control sound source acoustic centre of sourcece2Equal；
Described second active guidance system, it comprises a reference microphone, is arranged on inside control sound source, near propeller fan；
Described second active guidance system, in the case of not comprising with reference to microphone, active controller is internally generated 100Hz and harmonic signal thereof the reference signal as transformer noise；
Described second active guidance system, in the case of not comprising with reference to microphone, uses optical sensor or speed probe to gather the reference signal as noise of axial flow fan for the propeller fan tach signal as reference sensor.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620156495.1U CN205723070U (en) | 2016-03-01 | 2016-03-01 | A kind of indoor transformer ventilation denoising device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620156495.1U CN205723070U (en) | 2016-03-01 | 2016-03-01 | A kind of indoor transformer ventilation denoising device |
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| CN205723070U true CN205723070U (en) | 2016-11-23 |
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| CN201620156495.1U Active CN205723070U (en) | 2016-03-01 | 2016-03-01 | A kind of indoor transformer ventilation denoising device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105551767A (en) * | 2016-03-01 | 2016-05-04 | 江苏方天电力技术有限公司 | Ventilating and noise-reducing apparatus for indoor transformer |
| CN107767855A (en) * | 2017-09-15 | 2018-03-06 | 南京大学 | A kind of active broadband sound arrester for wall ventilation |
-
2016
- 2016-03-01 CN CN201620156495.1U patent/CN205723070U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105551767A (en) * | 2016-03-01 | 2016-05-04 | 江苏方天电力技术有限公司 | Ventilating and noise-reducing apparatus for indoor transformer |
| CN107767855A (en) * | 2017-09-15 | 2018-03-06 | 南京大学 | A kind of active broadband sound arrester for wall ventilation |
| CN107767855B (en) * | 2017-09-15 | 2021-12-17 | 南京大学 | Active broadband sound insulation device for wall ventilation |
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