CN113066649A - Low-noise oil-immersed transformer - Google Patents
Low-noise oil-immersed transformer Download PDFInfo
- Publication number
- CN113066649A CN113066649A CN202110348641.6A CN202110348641A CN113066649A CN 113066649 A CN113066649 A CN 113066649A CN 202110348641 A CN202110348641 A CN 202110348641A CN 113066649 A CN113066649 A CN 113066649A
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- Prior art keywords
- sound insulation
- low noise
- layer
- filled transformer
- damping
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Links
- 238000009413 insulation Methods 0.000 claims abstract description 64
- 238000013016 damping Methods 0.000 claims abstract description 38
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 12
- 229910052782 aluminium Inorganic materials 0.000 claims description 12
- 238000007493 shaping process Methods 0.000 claims description 9
- 238000013461 design Methods 0.000 claims description 3
- 239000010410 layer Substances 0.000 description 28
- 239000003921 oil Substances 0.000 description 15
- 239000004411 aluminium Substances 0.000 description 9
- 230000006872 improvement Effects 0.000 description 9
- 238000003475 lamination Methods 0.000 description 9
- 230000009467 reduction Effects 0.000 description 9
- 230000000694 effects Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 229910000976 Electrical steel Inorganic materials 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000005520 electrodynamics Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000012625 in-situ measurement Methods 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000005236 sound signal Effects 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Images
Classifications
-
- 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
-
- 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
- H01F27/08—Cooling; Ventilating
- H01F27/10—Liquid cooling
- H01F27/12—Oil cooling
- H01F27/14—Expansion chambers; Oil conservators; Gas cushions; Arrangements for purifying, drying, or filling
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Regulation Of General Use Transformers (AREA)
Abstract
The invention discloses a low-noise oil-immersed transformer which comprises an oil tank shell, wherein the oil tank shell comprises a top surface, a bottom surface and a plurality of side surfaces connected between the top surface and the bottom surface, and a damping sound insulation plate is arranged on at least one side surface. The invention has the advantages of compact structure, low cost, contribution to reducing the noise of the transformer body and the like.
Description
Technical Field
The invention relates to the technical field of power equipment, in particular to a low-noise oil-immersed transformer.
Background
The power transformer is an important link of a power transmission and distribution network of a power system, and is mainly used for converting the voltage of a power grid so as to realize electric energy transmission. With the continuous increase of the scale of the power grid and the shortage of urban land resources, more and more transformer stations go deep into the urban center. Due to a series of reasons of uneven manufacturing process, ageing of equipment, long-term operation, close distance with a sensitive point and the like, the problem of noise pollution of the power transformer is increasingly prominent, and the research on the transformer noise control technology has important significance for power grid development.
The transformer noise originates from the transformer body and the cooling system, wherein the body noise originates from (1) vibrations caused by iron core magnetostriction and winding electrodynamic force; (2) the electromagnetic attraction force generated by magnetic leakage exists between the joints of the silicon steel sheets and the laminated sheets to cause the vibration of the iron core; (3) when a load current passes through the winding, leakage flux generated by the load current causes vibration of the coil and the oil tank wall. The body noise is transmitted to the tank and the accessories through the core foot and the transformer oil. The noise of the cooling system is mainly derived from the vibration of the fan and the oil pump.
Research shows that the noise of the transformer body is composed of noise with two times of power supply frequency as base frequency and low-frequency noise with frequency as integral multiple of fundamental frequency, and the frequency spectrum of the noise is mainly concentrated on 50Hz and frequency multiplication components thereof within 700Hz range. The noise control of the transformer is mainly divided into two modes of noise source control and propagation path control. The former adopts modes of improving the material and structure of the transformer body and the like, can directly reduce the noise level of the transformer from the source, has the most obvious noise reduction effect, but has higher technical difficulty and cost. The latter reduces the transformer noise by applying a sound insulating/absorbing (vibrating) material to absorb the energy of the vibrating sound signal during the noise (vibration) transmission process, has a certain noise reduction effect and is relatively low in cost, but the noise reduction effect on the low-frequency signal still needs to be improved.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides the oil-immersed transformer which is compact in structure, low in cost and beneficial to reducing the noise of a transformer body.
In order to solve the technical problems, the invention adopts the following technical scheme:
the utility model provides a low noise oil-immersed transformer, includes the oil tank casing, the oil tank casing includes top surface, bottom surface and connects a plurality of sides between top surface and bottom surface, at least one be equipped with the damping sound-proof board on the side.
As a further improvement of the above technical solution: hanging parts are arranged at the upper end and the lower end of the side face, and hanging holes are arranged at the upper end and the lower end of the damping sound insulation plate and hung on the corresponding hanging parts. The damping sound insulation board has simple installation structure, good stability after installation and convenient maintenance and replacement.
As a further improvement of the above technical solution: the damping sound insulation board comprises a flexible sound insulation layer and shaping layers clamped on two sides of the flexible sound insulation layer. The flexible sound insulation layer is used for sound insulation, the shaping layer is mainly used for fixing the flexible sound insulation layer, and meanwhile, the three-interlayer structure is beneficial to improving the sound insulation quantity of the damping sound insulation plate.
As a further improvement of the above technical solution: the flexible sound insulation layer is a modified rubber layer, and the sound insulation quantity is not lower than 20 dB. The flexible sound insulation layer adopts the modified rubber layer, so that the sound insulation quantity is high, the weight is light, and the overall weight of the transformer is not increased too much.
As a further improvement of the above technical solution: the shaping layer is an aluminum layer. The shaping layer adopts the aluminium lamination, can fix flexible sound insulation layer effectively, and self quality is light, avoids increasing the whole weight of transformer excessively.
As a further improvement of the above technical solution: two adjacent damping sound insulation boards on the same side are in lap joint, and the joint of the flexible sound insulation layer and the joint of the shaping layer are staggered. The lap joint mode can greatly reduce the sound leakage between two adjacent damping sound insulation boards and basically realize seamless connection.
As a further improvement of the above technical solution: the thickness on flexible sound insulation layer is 10mm, the thickness on design layer is 2 mm.
As a further improvement of the above technical solution: the top surface and the bottom surface are of rectangular structures, the side surfaces corresponding to the long edges of the top surface and the bottom surface are provided with the damping sound insulation plate, and the side surfaces corresponding to the short edges of the top surface and the bottom surface are provided with the flexible sound insulation layer for blocking sound leakage points.
As a further improvement of the above technical solution: the thickness of the damping sound insulation plate is 10 mm-30 mm, the height of the damping sound insulation plate is 50 mm-200 mm larger than that of the oil tank shell, and the width of the damping sound insulation plate is less than or equal to 1.5 m. The thickness of the damping sound insulation plate is 10 mm-30 mm, the height of the damping sound insulation plate is 50 mm-200 mm larger than that of the oil tank shell, the sound insulation effect of the damping sound insulation plate is guaranteed, and meanwhile the area of the single damping sound insulation plate is beneficial to avoiding the resonance frequency of the oil tank shell.
As a further improvement of the above technical solution: the height of the damping sound insulation board is 3.1 m.
Compared with the prior art, the invention has the advantages that: the invention discloses a low-noise oil-immersed transformer, wherein damping sound insulation plates are directly arranged on each side surface of an oil tank shell for noise reduction, compared with the traditional transformer body noise reduction technology, the invention does not relate to the change of the internal structure of the transformer, does not influence the safe operation, does not increase the design cost and the manufacturing cost of the transformer, and compared with the traditional noise reduction technology of arranging sound barriers and other ways of cutting off propagation, the low-noise oil-immersed transformer does not need to occupy additional equipment fields, has compact structure and lower cost, is close to a sound source body, can more effectively reduce noise, and does not influence the heat dissipation of the transformer (a radiating fin is usually connected with the transformer body part through an oil pipe). The invention relates to a noise reduction technology which is suitable for the combination of two modes of body noise reduction and propagation path noise reduction of an oil-immersed transformer, and the result shows that the noise of the transformer body can be effectively reduced through tests under no-load working conditions and full-load working conditions.
Drawings
Fig. 1 is a schematic perspective view of a low-noise oil-immersed transformer according to the present invention.
Fig. 2 is a partially enlarged view of fig. 1.
Fig. 3 is a schematic structural diagram of the overlapping position of the damping and sound insulation plate in the invention.
FIG. 4 is a schematic diagram of the distribution of noise measurement points according to the present invention.
The reference numerals in the figures denote: 1. a tank housing; 11. a top surface; 12. a bottom surface; 13. a side surface; 14. a hanging part; 2. a damping sound insulation plate; 21. hanging holes; 22. a flexible sound insulating layer; 23. and (6) a shaping layer.
Detailed Description
The invention is described in further detail below with reference to the figures and specific examples of the specification.
Fig. 1 to 4 show an embodiment of a low-noise oil-immersed transformer according to the present invention, in this embodiment, a plurality of hanging parts 14 (for example, hooks, hanging rods, and the like) are preset on each side surface 13 of an oil tank housing 1 of the oil-immersed transformer, and are arranged in an up-down manner, and two hanging holes 21 are respectively configured at the upper end and the lower end of each damping and sound insulation plate 2, and are detachably mounted on the side surface 13 through the hanging holes 21; the damping sound insulation board 2 is arranged between the oil tank shell 1 and a radiating fin (not shown in the figure, the radiating fin is usually connected with the oil tank shell 1 by an oil pipe) after being installed; damping sound-proof board 2 includes two-layer aluminium lamination and presss from both sides the flexible sound insulation layer 22 of locating between two-layer aluminium lamination, and the aluminium lamination is mainly as stereotype layer 23, and fixed flexible sound insulation layer 22 is sandwich structure, and two damping sound-proof boards 2 that face mutually that are located same side 13 are through the staggered mode overlap joint of inside and outside aluminium lamination (the aluminium lamination that is close to oil tank casing 1 is inboard aluminium lamination, and another aluminium lamination of corresponding is outside aluminium lamination), and final connection is a whole.
In the embodiment, the thickness of the damping sound insulation plate 2 is 14mm, wherein the thickness of the aluminum layer is 2mm, and the thickness of the flexible sound insulation layer 22 is 10 mm; the height of the damping sound insulation plate 2 is 3.1m, the maximum width is 1.2m, the whole shell is provided with 23 damping sound insulation plates 2, and the short-side part area of the transformer is further blocked by flexible sound insulation materials.
The noise characteristics of the transformer before and after the damping sound insulation plate 2 is additionally arranged in a factory are tested, and the test standard is that part 2 of the sound insulation performance of an acoustic sound insulation cover is determined according to GB/T18699.2-2002: in-situ measurement (for acceptance and verification), two transformer working conditions, namely a no-load working condition and a 100% load working condition, are tested, noise measuring points are arranged around the transformer, and the measuring points are arranged as shown in fig. 4, wherein the total number of the measuring points is 40. The test results are shown in the following tables (one) and (two). It can be seen that, after the damping sound insulation plate 2 is additionally arranged on the oil-immersed transformer, under the no-load working condition, the weighting sound insulation quantity A is 3dB (A); under the 100% load working condition, the weighted sound insulation quantity A is 4dB (A).
(A)
(II)
Although the present invention has been described with reference to the preferred embodiments, it is not intended to be limited thereto. Those skilled in the art can make numerous possible variations and modifications to the present invention, or modify equivalent embodiments to equivalent variations, without departing from the scope of the invention, using the teachings disclosed above. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention should fall within the protection scope of the technical scheme of the present invention, unless the technical spirit of the present invention departs from the content of the technical scheme of the present invention.
Claims (10)
1. The utility model provides a low noise oil-immersed transformer, includes oil tank casing (1), its characterized in that: the oil tank shell (1) comprises a top surface (11), a bottom surface (12) and a plurality of side surfaces (13) connected between the top surface (11) and the bottom surface (12), and at least one damping sound insulation plate (2) is arranged on each side surface (13).
2. The low noise oil filled transformer of claim 1, wherein: hanging parts (14) are arranged at the upper end and the lower end of the side surface (13), and hanging holes (21) are arranged at the upper end and the lower end of the damping sound insulation plate (2) and hung on the corresponding hanging parts (14).
3. The low noise oil filled transformer of claim 1, wherein: the damping sound insulation board (2) comprises a flexible sound insulation layer (22) and shaping layers (23) clamped on two sides of the flexible sound insulation layer (22).
4. The low noise oil filled transformer of claim 3, wherein: the flexible sound insulation layer (22) is a modified rubber layer, and the sound insulation quantity is not lower than 20 dB.
5. The low noise oil filled transformer of claim 4, wherein: the shaping layer (23) is an aluminum layer.
6. The low noise oil filled transformer of claim 3, wherein: two adjacent damping sound insulation plates (2) positioned on the same side (13) are overlapped, and the seam of the flexible sound insulation layer (22) and the seam of the shaping layer (23) are staggered.
7. The low noise oil filled transformer according to any of claims 3-6, wherein: the thickness of flexible sound insulation layer (22) is 10mm, the thickness of design layer (23) is 2 mm.
8. The low noise oil filled transformer according to any of claims 3-6, wherein: the top surface (11) and the bottom surface (12) are of rectangular structures, the long sides of the top surface (11) and the bottom surface (12) correspond to the side surfaces (13) of the damping sound insulation plate (2), the short sides of the top surface (11) and the bottom surface (12) correspond to the side surfaces (13) of the flexible sound insulation layer (22) to seal sound leakage points.
9. The low noise oil filled transformer according to any of claims 1-6, wherein: the thickness of the damping sound insulation plate (2) is 10-30 mm, the height of the damping sound insulation plate (2) is 50-200 mm larger than that of the oil tank shell (1), and the width of the damping sound insulation plate is less than or equal to 1.5 m.
10. The low noise oil filled transformer of claim 9, wherein: the height of the damping sound insulation board (2) is 3.1 m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110348641.6A CN113066649A (en) | 2021-03-31 | 2021-03-31 | Low-noise oil-immersed transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110348641.6A CN113066649A (en) | 2021-03-31 | 2021-03-31 | Low-noise oil-immersed transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113066649A true CN113066649A (en) | 2021-07-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110348641.6A Pending CN113066649A (en) | 2021-03-31 | 2021-03-31 | Low-noise oil-immersed transformer |
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Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101577170A (en) * | 2008-05-06 | 2009-11-11 | 上海置信电气非晶有限公司 | Oil tank for oil immersion type transformer |
| CN201732653U (en) * | 2010-07-16 | 2011-02-02 | 江苏上能变压器有限公司 | Sound-proof oil tank structure of transformer |
| CN201933632U (en) * | 2011-01-19 | 2011-08-17 | 韩晶晶 | Soundproof wall |
| CN203466021U (en) * | 2013-08-31 | 2014-03-05 | 申大变压器有限公司 | Sound isolator for transformer oil tank |
| CN204753865U (en) * | 2015-06-25 | 2015-11-11 | 辽宁省石油化工规划设计院有限公司 | Coincide formula foamed ceramic sound insulation slat |
| CN105810419A (en) * | 2016-03-30 | 2016-07-27 | 中国电力科学研究院 | Noise reduction apparatus for transformer, transformer oil tank and transformer |
| CN205645450U (en) * | 2016-04-25 | 2016-10-12 | 国网天津市电力公司 | Type of making an uproar power transformer oil tank structure is fallen |
| TWI563522B (en) * | 2015-07-24 | 2016-12-21 | Fortune Electric Co Ltd | |
| CN206774361U (en) * | 2017-06-09 | 2017-12-19 | 国网新疆电力公司木垒县供电公司 | A kind of denoising device of power transformer |
| CN208368312U (en) * | 2018-05-14 | 2019-01-11 | 山东迪米特电气有限公司 | Reduce the Oiltank structure of transformer noise |
| CN210628056U (en) * | 2019-09-30 | 2020-05-26 | 北特变压器有限公司 | Oil-immersed transformer that possesses vibration/noise reduction function |
| CN210668062U (en) * | 2019-10-24 | 2020-06-02 | 绍兴建元电力集团有限公司大兴电力承装分公司 | Constraint damping composite noise reduction structure applied to inner wall of transformer oil tank |
| CN211319916U (en) * | 2019-11-29 | 2020-08-21 | 北京恒静禾声环保有限公司 | Sound absorption and insulation plate for low-frequency noise of transformer |
| CN211427994U (en) * | 2020-02-27 | 2020-09-04 | 广东汇力电气有限公司 | Oil-immersed transformer |
-
2021
- 2021-03-31 CN CN202110348641.6A patent/CN113066649A/en active Pending
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101577170A (en) * | 2008-05-06 | 2009-11-11 | 上海置信电气非晶有限公司 | Oil tank for oil immersion type transformer |
| CN201732653U (en) * | 2010-07-16 | 2011-02-02 | 江苏上能变压器有限公司 | Sound-proof oil tank structure of transformer |
| CN201933632U (en) * | 2011-01-19 | 2011-08-17 | 韩晶晶 | Soundproof wall |
| CN203466021U (en) * | 2013-08-31 | 2014-03-05 | 申大变压器有限公司 | Sound isolator for transformer oil tank |
| CN204753865U (en) * | 2015-06-25 | 2015-11-11 | 辽宁省石油化工规划设计院有限公司 | Coincide formula foamed ceramic sound insulation slat |
| TWI563522B (en) * | 2015-07-24 | 2016-12-21 | Fortune Electric Co Ltd | |
| CN105810419A (en) * | 2016-03-30 | 2016-07-27 | 中国电力科学研究院 | Noise reduction apparatus for transformer, transformer oil tank and transformer |
| CN205645450U (en) * | 2016-04-25 | 2016-10-12 | 国网天津市电力公司 | Type of making an uproar power transformer oil tank structure is fallen |
| CN206774361U (en) * | 2017-06-09 | 2017-12-19 | 国网新疆电力公司木垒县供电公司 | A kind of denoising device of power transformer |
| CN208368312U (en) * | 2018-05-14 | 2019-01-11 | 山东迪米特电气有限公司 | Reduce the Oiltank structure of transformer noise |
| CN210628056U (en) * | 2019-09-30 | 2020-05-26 | 北特变压器有限公司 | Oil-immersed transformer that possesses vibration/noise reduction function |
| CN210668062U (en) * | 2019-10-24 | 2020-06-02 | 绍兴建元电力集团有限公司大兴电力承装分公司 | Constraint damping composite noise reduction structure applied to inner wall of transformer oil tank |
| CN211319916U (en) * | 2019-11-29 | 2020-08-21 | 北京恒静禾声环保有限公司 | Sound absorption and insulation plate for low-frequency noise of transformer |
| CN211427994U (en) * | 2020-02-27 | 2020-09-04 | 广东汇力电气有限公司 | Oil-immersed transformer |
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Application publication date: 20210702 |