CN105632734B - Low-noise dry type air reactor - Google Patents
Low-noise dry type air reactor Download PDFInfo
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- CN105632734B CN105632734B CN201610163014.4A CN201610163014A CN105632734B CN 105632734 B CN105632734 B CN 105632734B CN 201610163014 A CN201610163014 A CN 201610163014A CN 105632734 B CN105632734 B CN 105632734B
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- reactor
- noise
- aluminum conductor
- type air
- low
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F37/00—Fixed inductances not covered by group H01F17/00
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/2823—Wires
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/30—Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support
- H01F27/306—Fastening or mounting coils or windings on core, casing or other support
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/33—Arrangements for noise damping
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Regulation Of General Use Transformers (AREA)
Abstract
The present invention relates to tranformer protection equipment technical field, in particular to a kind of low-noise dry type air reactor; taking from inside to outside reduces the measure of noise; including reactor main body, the main body is provided with reactor winding, and injecting glue wire is wound with outside reactor winding（1）, injecting glue wire（1）Inside for sub-thread justify aluminum conductor（21）, so as to realize that the inside of reactor reduces noise；The top of reactor main body is provided with rainhat（12）, rainhat（12）Inside and the bottom of reactor main body be equipped with environmental protection sound absorption cotton, so as to realize that the outside of reactor reduces noise.
Description
Technical field
The present invention relates to tranformer protection equipment technical field, in particular to a kind of hollow reactance of low-noise dry type
Device.
Background technology
Dry-type air-core reactor transmits electricity to obtain because its inductance linearity is good, cost is low, the advantage such as non-maintaining in AC and DC
Substantial amounts of application.Dry-type air-core reactor is operated under exchange or direct current environment containing harmonic current, the coil of reactor winding
Vibration is occurred so as to produce noise by the effect of electromagnetic force, external environment is made a very bad impression.
Such as the Chinese utility model patent that Authorization Notice No. is the U of CN 204066935, it discloses a kind of low noise to do
Formula hollow filter reactor, include the reactor housing of hollow cylindrical form, reactor winding is installed in reactor housing, electricity
The inwall of anti-device housing is provided with columnar sound insulation cover body, and the air-flow that ventilation is formed between sound insulation cover body and reactor winding leads to
Road, one layer of acoustical panel is equipped with the both ends of reactor winding, acoustical panel is located in acoustic hood body, acoustical panel and gas channel pair
It should locate to be provided with diameter and gas channel width identical air vent, the top for the cover body that insulates against sound is provided with opening, the bottom of reactor housing
Symmetrically arranged two Fans in portion, the air outlet of each blower fan are connected to the gas channel of respective side；The bottom of reactor housing
Both ends are provided with support insulator.It is of the present utility model can effective noise reduction, moreover, being provided with gas channel, do not influence reactor
The radiating of winding, and blower ventilation is used, easily realize, extend its service life, have a good application prospect.Due to electricity
The bottom of anti-device housing sets blower fan, although being advantageous to the radiating of reactor winding, caused noise is larger, and overall knot
Structure is complex.
In another example Authorization Notice No. is the U of CN 202093925 Chinese utility model patent, can it discloses a kind of resistance
Adjust neutral point grounding dry type hollow reactor, including frames and be fixed on above frames, by frames support
Dry-type air-core reactor, dry-type air-core reactor include an inductive coil, the multiple noninductive lines being centered around on the outside of inductive coil
Circle and multiple resistor taps, multiple noninductive coils be connected in series after, be connected in series with inductive coil, the output of each noninductive coil
End is connected with a resistor tap, and the output end of dry reactor is connected with any one in the multiple resistor tap.Should
The neutral point grounding dry type hollow reactor with adjustable resistance of utility model, by setting multiple noninductive coils being connected in series, and
Resistor tap is set in the output end of each noninductive coil so that the neutral resistor value of the reactor is adjustable.Spirit can be passed through
Regulation neutral resistor value living, each transformer station's ground potential distribution is balanced, electric current is reduced and pours in down a chimney, transformer work is recovered again just
Often, noise level is reduced.But the reactor lacks the device for reducing noise, its noise is larger.
The content of the invention
It is an object of the invention to provide a kind of low-noise dry type air reactor, is arranged by being taken in terms of inside and outside two
Apply to solve the problems, such as reactor noise.
In order to realize above-mentioned purpose of design, the scheme that the present invention uses is as follows：
A kind of low-noise dry type air reactor, including reactor main body, the main body are provided with reactor winding；The main body
Top be provided with rainhat, injecting glue wire is wound with outside the reactor winding, the inside of injecting glue wire is provided with multiple sub-threads
Circle aluminum conductor；The inside of rainhat is provided with environmental protection sound absorption cotton.The dry-type air-core reactor of the present invention is taken in terms of inside and outside two
Measure reduces reactor noise.Internal aspect：Injecting glue wire is wound with outside reactor winding, in root caused by reactor noise
Upper reduction noise；Outside aspect：Increase resistance pseudobed in reactor circumferencial direction outermost layer, reduce the noise for passing to outside；Together
When, the inside of the rainhat at the top of reactor is provided with environmental protection sound absorption cotton and absorbs top noise and further reach reduction reactor
The purpose of noise.
Preferably, the bottom of the reactor main body is provided with acoustic hood, is passed longitudinally outward so as to reduce reactor noise
Broadcast the purpose for reaching reactor entirety low noise.
In any of the above-described scheme preferably, the inside of the acoustic hood is provided with bottom environmental protection sound absorption cotton 15, further
Reduce reactor noise to propagate longitudinally outward, reach the purpose of reactor entirety low noise.
In any of the above-described scheme preferably, fully dip in glue in the injecting glue wire winding process and cause adjacent wire
Contact solidification is integral, strengthens the rigidity of reactor winding, reduces coil vibration and sends noise.
In any of the above-described scheme preferably, resistance pseudobed is provided with outside the circumferencial direction of the reactor main body, from
And noise is avoided laterally outward to propagate.
Resistance pseudobed is the winding layer of epoxy yarn parcel environmental protection sound absorption cotton, plays protection coil and soaking reactor noise
Effect.
In any of the above-described scheme preferably, the injecting glue wire justifies aluminum conductor by more sub-threads and passes through wire external insulation
Layer parcel forms, and plays a part of and other wire insulations.
In any of the above-described scheme preferably, it is filled between multiple sub-threads circle aluminum conductor of the inside of the injecting glue wire
Epoxy insulation glue.
Using gap between epoxy insulation glue filling adjacent wires, instead of original the air gap, make internal each sub-thread circle aluminium
Wire solidification is integrated, and effectively reduces conductor vibration, reaches the purpose for reducing noise；Epoxy insulation glue has excellent electric insulation
Performance and mechanical performance, this can not only strengthen reactor electrical strength, and can improve the overall mechanical strength of wire, be advantageous to
The lifting of reactor performance.
In any of the above-described scheme preferably, the sub-thread circle aluminum conductor is more capsule structures.
In any of the above-described scheme preferably, the outside of the sub-thread circle aluminum conductor is by justifying aluminum conductor insulating barrier parcel.
In any of the above-described scheme preferably, the centre of the sub-thread circle aluminum conductor is aluminum steel.
In any of the above-described scheme preferably, the round aluminum conductor insulating barrier is by nonwoven fabric, aluminum conductor coating and compound
Cloth forms.
In any of the above-described scheme preferably, the aluminum conductor coating is bonded with aluminum steel, plays External Insulation.
In any of the above-described scheme preferably, the nonwoven fabric is between aluminum conductor coating and Compound Fabric.To reduce
Vibration between the coating and coating of sub-thread circle aluminum conductor, increases by one layer of nonwoven fabric between coating, plays the work of vibration damping
With effectively reducing the noise because of caused by vibration.
Nonwoven fabric is a kind of fabric that need not be spinned cotton and woven cloth and be formed, and is simply determined textile staple or long filament
To or random alignment, formed fibre net structure, then using it is mechanical, hot sticky or chemical the methods of reinforce form.It is directly using high
Polymers section, chopped fiber or long filament have soft, ventilative and plane by what various web forming methods and concretion technology were formed
The tencel product of structure.Therefore the present invention selects nonwoven fabric, plays a part of vibration damping, effectively reduce because of vibration and
Caused noise.
In any of the above-described scheme preferably, the Compound Fabric is combined by polyester and nonwoven fabric.
In any of the above-described scheme preferably, the Compound Fabric is combined by imines and nonwoven fabric.
In any of the above-described scheme preferably, the inside of the resistance pseudobed is provided with the thick environmental protection sound absorption cottons of 70mm, can be with
The noise that effective soaking reactor is sent, the noise propagated out are effectively suppressed, and reach the purpose of reactor low noise.
Brief description of the drawings
Fig. 1 is the structural representation according to the low-noise dry type air reactor of the present invention.
Fig. 2 is the disconnected of injecting glue wire in Fig. 1 according to the preferred embodiment of the low-noise dry type air reactor of the present invention
Face figure.
Fig. 3 is that sub-thread justifies aluminum conductor in Fig. 2 according to the preferred embodiment of the low-noise dry type air reactor of the present invention
Sectional drawing.
Fig. 4 is resistance pseudobed structure in Fig. 1 according to the preferred embodiment of the low-noise dry type air reactor of the present invention
Schematic diagram.
Label declaration in figure：
Injecting glue wire 1, rainhat 12, environmental protection sound absorption cotton 13, resistance pseudobed 14, the thick environmental protection sound absorption cottons 141 of 70mm, bottom part ring
Protect sound absorption cotton 15, acoustic hood 16, sub-thread circle aluminum conductor 21, circle aluminum conductor insulating barrier 22, epoxy insulation glue 23, wire external insulation layer
24, aluminum steel 31, nonwoven fabric 32, aluminum conductor coating 33, Compound Fabric 34.
Embodiment
In order to more fully understand the low-noise dry type air reactor according to the present invention, describe below in conjunction with the accompanying drawings according to this
The specific embodiment of the low-noise dry type air reactor of invention.
With reference to figure 1, according to the overall structure diagram of the low-noise dry type air reactor of the present invention.A kind of low noise is done
Formula air reactor, including reactor main body, the main body are provided with reactor winding；The top of the main body is provided with rainhat 12,
Injecting glue wire 1 is wound with outside the reactor winding, the inside of injecting glue wire 1 is to justify aluminum conductor 21 provided with multiple sub-threads；Rain-proof
The inside of cap 12 is provided with environmental protection sound absorption cotton 13.The dry-type air-core reactor of the present invention takes measures to reduce in terms of inside and outside two
Reactor noise.Internal aspect：Injecting glue wire 1 is wound with outside reactor winding, is being reduced caused by reactor noise in root
Noise；Outside aspect：Increase resistance pseudobed in reactor circumferencial direction outermost layer, reduce the noise for passing to outside；Meanwhile in electricity
The inside of rainhat 12 at the top of anti-device is provided with environmental protection sound absorption cotton 13 and absorbs top noise and further reach reduction reactor and make an uproar
The purpose of sound.
In the present embodiment, the bottom of the reactor main body is provided with acoustic hood 16, so as to reduce reactor noise longitudinal direction
Outwards propagate the purpose for reaching reactor entirety low noise.
In the present embodiment, the inside of the acoustic hood 16 is provided with bottom environmental protection sound absorption cotton 15, further reduces reactor
Noise is propagated longitudinally outward, reaches the purpose of reactor entirety low noise.
In the present embodiment, fully glue is dipped in so that adjacent conductive contact is solidified into the winding process of injecting glue wire 1
It is overall, strengthen the rigidity of reactor winding, reduce coil vibration and send noise.
In the present embodiment, resistance pseudobed 14 is provided with outside the circumferencial direction of the reactor main body, so as to avoid noise
Laterally outward propagate.
Referring next to shown in Fig. 2, in Fig. 1 according to the preferred embodiment of the low-noise dry type air reactor of the present invention
The sectional drawing of injecting glue wire.
In the present embodiment, the injecting glue wire 1 is justified aluminum conductor 21 by more sub-threads and wrapped up by wire external insulation layer 24
Form, play a part of and other wire insulations.
In the present embodiment, it is filled with epoxy insulation between multiple sub-threads circle aluminum conductor 21 of the inside of the injecting glue wire 1
Glue 23.
Using gap between the filling adjacent wires of epoxy insulation glue 23, instead of original the air gap, make internal each sub-thread circle
The solidification of aluminum conductor 21 is integrated, and effectively reduces conductor vibration, reaches the purpose for reducing noise；Epoxy insulation glue 23 has excellent
Electrical insulation capability and mechanical performance, this can not only strengthen reactor electrical strength, and can improve the overall mechanical strength of wire,
Be advantageous to the lifting of reactor performance.
The main performance of insulating cement is as shown in table 1：
In the present embodiment, the sub-thread circle aluminum conductor 21 is more capsule structures.
In the present embodiment, the outside of the sub-thread circle aluminum conductor 21 is wrapped up by justifying aluminum conductor insulating barrier 22.
In the present embodiment, the centre of the sub-thread circle aluminum conductor 21 is aluminum steel 31.
As shown in figure 3, justify aluminium according to sub-thread in Fig. 2 of the preferred embodiment of the low-noise dry type air reactor of the present invention
The sectional drawing of wire.
In the present embodiment, the round aluminum conductor insulating barrier 22 is by 34 groups of nonwoven fabric 32, aluminum conductor coating 33 and Compound Fabric
Into.
In the present embodiment, the aluminum conductor coating 33 is bonded with aluminum steel 31, plays External Insulation.
In the present embodiment, the nonwoven fabric 32 is between aluminum conductor coating 33 and Compound Fabric 34.To reduce sub-thread circle
Vibration between the coating and coating of aluminum conductor 21, increase by one layer of nonwoven fabric 32 between coating, play a part of vibration damping,
Effectively reduce the noise because of caused by vibration.
In the present embodiment, the Compound Fabric 34 is combined by polyester and nonwoven fabric.
In the present embodiment, the Compound Fabric 34 is combined by imines and nonwoven fabric.
Finally as shown in fig.4, Fig. 1 moderate resistances of the preferred embodiment according to the low-noise dry type air reactor of the present invention
Property pseudobed structural representation.
In the present embodiment, the inside of the resistance pseudobed 14 is provided with the thick environmental protection sound absorption cottons 141 of 70mm, can effectively inhale
The noise that reactor is sent is received, the noise propagated out is effectively suppressed, and reaches the purpose of reactor low noise.
It will be apparent to those skilled in the art that the low-noise dry type air reactor of the present invention includes each portion in this specification
Any combination divided.As space is limited and in order that the simplicity of specification, does not herein introduce these combinations in detail one by one, but
After having seen this specification, the scope of the present invention that any combination for each several part being made up of this specification is formed has not been sayed certainly
It is bright, therefore be not added with repeating.
Claims (6)
1. a kind of low-noise dry type air reactor, including reactor main body, the main body is provided with reactor winding；The main body
Top is provided with rainhat（12）, it is characterised in that：Injecting glue wire is wound with outside reactor winding（1）, injecting glue wire（1）By outer exhausted
Edge layer（24）Wrap up more sub-thread circle aluminum conductors（21）Form；More sub-threads circle aluminum conductor in external insulation layer（21）Between be filled with
Epoxy insulation glue；Sub-thread justifies aluminum conductor（21）Outside by justifying aluminum conductor insulating barrier（22）Parcel；Circle aluminum conductor insulating barrier（22）
By nonwoven fabric（32）, aluminum conductor coating（33）And Compound Fabric（34）Composition；Aluminum conductor coating（33）It is bonded with circle aluminum conductor, it is non-to knit
Cloth（32）Positioned at aluminum conductor coating（33）With Compound Fabric（34）Between；Compound Fabric（34）Be combined by polyester and nonwoven fabric or by
Imines and nonwoven fabric are combined；Nonwoven fabric is a kind of fabric that need not be spinned cotton and woven cloth and be formed, and it is by textile staple
Or long filament is oriented or random alignment, fibre net structure is formed, is then reinforced and formed using mechanical, hot sticky or chemical method,
It is directly formed using high polymer section, chopped fiber or long filament by various web forming methods and concretion technology；Rainhat
（12）Inside be provided with environmental protection sound absorption cotton（13）.
2. low-noise dry type air reactor as claimed in claim 1, it is characterised in that：The bottom of the reactor main body is set
There is acoustic hood（16）.
3. low-noise dry type air reactor as claimed in claim 2, it is characterised in that：Acoustic hood（16）Inside be provided with bottom
Portion's environmental protection sound absorption cotton（15）.
4. low-noise dry type air reactor as claimed in claim 1, it is characterised in that：Injecting glue wire（1）In winding process
Fully dip in glue and make it that adjacent injecting glue conductive contact solidification is integral.
5. low-noise dry type air reactor as claimed in claim 1 or 2, it is characterised in that：The circle of the reactor main body
Resistance pseudobed is provided with outside circumferential direction（14）.
6. low-noise dry type air reactor as claimed in claim 5, it is characterised in that：Resistance pseudobed（14）Inside be provided with
The thick environmental protection sound absorption cottons of 70mm（141）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610163014.4A CN105632734B (en) | 2016-03-22 | 2016-03-22 | Low-noise dry type air reactor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610163014.4A CN105632734B (en) | 2016-03-22 | 2016-03-22 | Low-noise dry type air reactor |
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| Publication Number | Publication Date |
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| CN105632734A CN105632734A (en) | 2016-06-01 |
| CN105632734B true CN105632734B (en) | 2018-01-16 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107221422A (en) * | 2017-06-02 | 2017-09-29 | 北京电力设备总厂有限公司 | Dry-type hollow filter reactor denoising device |
| CN110504091A (en) * | 2019-08-16 | 2019-11-26 | 西安合容电力设备有限公司 | A kind of dry-type hollow filter reactor |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201478084U (en) * | 2009-08-17 | 2010-05-19 | 北京电力设备总厂 | Noise reduction device for a dry air-core type reactor |
| CN201804671U (en) * | 2010-01-18 | 2011-04-20 | 杨保和 | Low-noise reactor |
| CN102709031A (en) * | 2012-02-03 | 2012-10-03 | 苏州天擎电子通讯有限公司 | Novel electric reactor |
| CN204087975U (en) * | 2014-09-19 | 2015-01-07 | 北京电力设备总厂 | For the bottom acoustic hood of dry reactor |
| CN204087973U (en) * | 2014-09-19 | 2015-01-07 | 北京电力设备总厂 | For the rainproof acoustic hood of dry reactor |
| CN204257241U (en) * | 2014-09-18 | 2015-04-08 | 北京电力设备总厂有限公司 | For the low noise transposition aluminum conductor of dry reactor |
| CN105225730A (en) * | 2014-05-26 | 2016-01-06 | 上海顺潮工业有限公司 | For the waterproof low noise film bag rectangular aluminum twisted wire of reactor |
-
2016
- 2016-03-22 CN CN201610163014.4A patent/CN105632734B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201478084U (en) * | 2009-08-17 | 2010-05-19 | 北京电力设备总厂 | Noise reduction device for a dry air-core type reactor |
| CN201804671U (en) * | 2010-01-18 | 2011-04-20 | 杨保和 | Low-noise reactor |
| CN102709031A (en) * | 2012-02-03 | 2012-10-03 | 苏州天擎电子通讯有限公司 | Novel electric reactor |
| CN105225730A (en) * | 2014-05-26 | 2016-01-06 | 上海顺潮工业有限公司 | For the waterproof low noise film bag rectangular aluminum twisted wire of reactor |
| CN204257241U (en) * | 2014-09-18 | 2015-04-08 | 北京电力设备总厂有限公司 | For the low noise transposition aluminum conductor of dry reactor |
| CN204087975U (en) * | 2014-09-19 | 2015-01-07 | 北京电力设备总厂 | For the bottom acoustic hood of dry reactor |
| CN204087973U (en) * | 2014-09-19 | 2015-01-07 | 北京电力设备总厂 | For the rainproof acoustic hood of dry reactor |
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| CN105632734A (en) | 2016-06-01 |
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Effective date of registration: 20170824 Address after: 102401 Beijing City, Fangshan District Liangxiang Haotian Street No. 12 Applicant after: Co., Ltd of Beijing Electrical Equipment Factory Applicant after: State Grid Zhejiang Electric Power Company Address before: 102401 Beijing City, Fangshan District Liangxiang Haotian Street No. 12 Applicant before: Co., Ltd of Beijing Electrical Equipment Factory |
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