CN107240490B - Sound absorption and noise reduction treatment device and method for oil immersed panel - Google Patents
Sound absorption and noise reduction treatment device and method for oil immersed panel Download PDFInfo
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- CN107240490B CN107240490B CN201710488651.3A CN201710488651A CN107240490B CN 107240490 B CN107240490 B CN 107240490B CN 201710488651 A CN201710488651 A CN 201710488651A CN 107240490 B CN107240490 B CN 107240490B
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- 238000010521 absorption reaction Methods 0.000 title claims abstract description 73
- 230000009467 reduction Effects 0.000 title claims abstract description 65
- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000013016 damping Methods 0.000 claims abstract description 14
- 230000008878 coupling Effects 0.000 claims abstract description 5
- 238000010168 coupling process Methods 0.000 claims abstract description 5
- 238000005859 coupling reaction Methods 0.000 claims abstract description 5
- 229910052751 metal Inorganic materials 0.000 claims description 14
- 239000002184 metal Substances 0.000 claims description 14
- 238000009434 installation Methods 0.000 claims description 9
- 239000000123 paper Substances 0.000 claims description 8
- 239000007788 liquid Substances 0.000 claims description 7
- 229910045601 alloy Inorganic materials 0.000 claims description 6
- 239000000956 alloy Substances 0.000 claims description 6
- 239000011087 paperboard Substances 0.000 claims description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 239000000919 ceramic Substances 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- 239000006096 absorbing agent Substances 0.000 abstract description 9
- 238000012423 maintenance Methods 0.000 abstract description 4
- 239000000463 material Substances 0.000 abstract description 2
- 238000001514 detection method Methods 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 61
- 239000010410 layer Substances 0.000 description 13
- 229910052782 aluminium Inorganic materials 0.000 description 9
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical group [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 9
- 230000005540 biological transmission Effects 0.000 description 7
- 239000002356 single layer Substances 0.000 description 6
- 229910000976 Electrical steel Inorganic materials 0.000 description 5
- 230000009466 transformation Effects 0.000 description 5
- 239000002131 composite material Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011111 cardboard Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/161—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general in systems with fluid flow
-
- 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
Abstract
The invention discloses an oil immersed panel sound absorption and noise reduction treatment device and method, wherein the device consists of a plurality of panel sound absorption modules, each panel sound absorption unit consists of a plate unit, a plurality of damping units and a plurality of supporting units, and the plate unit is a sound absorption panel and is used for coupling sound waves in oil; the vibration reduction unit is composed of a vibration absorber array, is vertically arranged with the plate unit and the inner side wall of the oil tank, and is used for reducing the panel plane forced vibration of the plate unit; the supporting unit is used for supporting the plate unit to be stably fixed; the method comprises the steps of detecting oil tank noise by using a sound level meter, and fixing a panel sound absorption module on the inner side wall of a corresponding oil tank according to a detection result, so that the panel sound absorption module absorbs power equipment noise; the device has low cost and safe material structure, and can be used in a transformer oil tank for a long time without maintenance.
Description
Technical Field
The invention relates to the field of power transmission and transformation environment protection, in particular to an oil immersed panel sound absorption and noise reduction treatment device and method.
Background
The noise of the power transmission and transformation is a main problem of pollution to the power transmission and transformation environment, and a large number of practical research tests related to power transmission and transformation noise engineering show that the body noise of the oil-immersed power equipment is a main source of the noise problem of the power transmission and transformation engineering, and the noise reduction control of the oil-immersed power equipment body is widely accepted as the most direct and fundamental means for effectively improving the noise environment of the transformer substation. At present, related industry personnel of the domestic and foreign electric power equipment explore the noise reduction technical measures of the oil-immersed electric power equipment body in multiple ways, but the technical measures have the defects of overhigh cost, poor heat dissipation, difficult maintenance and the like, so that the cost-effectiveness ratio is overhigh when the noise reduction measures are implemented, and the popularization and the application are limited.
Disclosure of Invention
In order to solve the problems of overhigh cost, difficult maintenance and the like of the prior noise reduction technology in the background technology, the invention provides a noise reduction processing device and a noise reduction processing method adopting an oil immersed panel sound absorption structure aiming at a liquid sound path of noise transmission of oil immersed power equipment;
an oil immersed panel sound absorption and noise reduction treatment device is arranged on the inner side wall of an oil tank of electric equipment and comprises one or more panel sound absorption modules, wherein each panel sound absorption module comprises at least one plate unit, one or more vibration reduction units and a supporting unit;
the plate unit is used for coupling with sound waves in the oil liquid;
the vibration reduction unit is vertically connected with the plate unit on one installation end surface and is used for reducing forced vibration outside the plane of the panel of the plate unit;
the supporting unit is used for supporting the plate unit to be stably fixed and keeping a fixed distance from the inner side wall of the oil tank;
further, the panel sound absorption modules are arranged on the inner side wall of the oil tank in a combined mode, and plate units of the panel sound absorption modules are parallel to the inner side wall of the oil tank, so that oil can be completely immersed into a cavity between the inner side wall of the oil tank and the plate units; the other installation end face of the vibration reduction unit of the panel sound absorption module is vertically connected with the inner side wall of the oil tank, the supporting unit is fixed between the plate unit and the inner side wall of the oil tank, and the distance between the plate unit of each panel sound absorption module and the inner side wall of the oil tank is equal;
further, the combination arrangement mode of the panel sound absorption modules is that any two or more of the panel sound absorption modules are overlapped, so that oil can be completely immersed into the cavity between the inner side wall of the box body and the plate units and between the plate units; the other installation end face of the vibration reduction unit of the overlapped lowest panel sound absorption module is vertically connected with the inner side wall of the oil tank, and the supporting unit is fixed between the plate unit and the inner side wall of the oil tank; the other end mounting end surface of the vibration reduction unit of the panel sound absorption module of the non-lowest layer is vertically connected with the plate unit of the panel sound absorption module of the lower layer, and the support module is fixed between the plate unit and the lower plate unit;
further, the plate unit is a metal plate, an alloy plate, an insulating paperboard or a ceramic plate;
further, the maximum dimension of the plate unit in the non-thickness direction is not less than 1/20 of the wavelength of sound waves to be subjected to noise reduction treatment in the oil liquid;
further, when the plate unit is a metal plate or an alloy plate, the plate unit is grounded, and the grounding end of the plate unit is connected with the grounding end of the inner side wall of the oil tank;
further, the vibration reduction units are uniformly arranged on the plate unit;
further, the vibration reduction unit is a metal wire rope vibration reduction device, a metal wire vibration reduction device, an oil damping vibration reduction device or a rubber damping vibration reduction device;
further, the total rigidity of the vibration reduction unit in the direction perpendicular to the plate unit is less than or equal to 1kN/mm per square meter;
further, the supporting module comprises an insulating paper cushion block and angle steel; the support module comprises an insulating paper cushion block and a fastener.
A method of noise reduction using the oil-immersed panel sound absorption and noise reduction treatment device according to any one of claims 1 to 10, the method comprising:
pre-fixing a panel sound absorption module on the inner side wall of the oil tank at a position with noise higher than a preset threshold value, wherein the panel sound absorption module is parallel to the inner side wall of the oil tank;
when noise emitted by the power equipment is transmitted to the panel sound absorption module, the panel sound absorption module absorbs all or part of the noise;
further, before the panel sound absorbing module is fixed on the inner side wall of the oil tank at the position where the noise is higher than the preset threshold value, the panel sound absorbing module further comprises:
and detecting noises at a plurality of positions in the oil tank when the electric power equipment in the oil tank is operated, and determining the position, in which the noises are higher than a preset threshold value, of the plurality of positions.
Further, a plurality of panel sound absorption modules are overlapped and arranged at the position with higher noise, and a single panel sound absorption module is arranged at the position with lower noise; the plurality of panel sound absorption modules are arranged horizontally with respect to each other.
The beneficial effects of the invention are as follows: according to the technical scheme, the device and the method for the sound absorption and noise reduction treatment of the oil-immersed panel, which are designed for the liquid sound path of the noise transmission of the oil-immersed power equipment, are low in cost, small in occupied internal space, safe in materials and structure, capable of being used in the transformer oil tank for a long time, free of maintenance and particularly suitable for inhibiting low-frequency line spectrum noise of the oil-immersed power equipment such as an oil-immersed transformer and a reactor. In addition, because the noise frequency of the power equipment basically consists of a plurality of specific line spectrum noises related to the power frequency, the box body structure of the power equipment is similar, the acoustic characteristics of the oil used for the power equipment in the industry are basically the same, and the device provided by the invention is particularly easy to realize standardized and modularized manufacturing and installation.
Drawings
Exemplary embodiments of the present invention may be more completely understood in consideration of the following drawings:
FIG. 1 is a block diagram of a multi-layer oil immersed panel sound absorption and noise reduction treatment device for 50Hz power frequency power equipment according to an embodiment of the invention;
FIG. 2 is a block diagram of a single-layer oil immersed panel sound absorption and noise reduction treatment device for 50Hz power frequency power equipment according to an embodiment of the invention; and
fig. 3 is a flowchart of a method for performing sound absorption and noise reduction on an oil immersed panel according to an embodiment of the present invention.
Detailed Description
The exemplary embodiments of the present invention will now be described with reference to the accompanying drawings, however, the present invention may be embodied in many different forms and is not limited to the examples described herein, which are provided to fully and completely disclose the present invention and fully convey the scope of the invention to those skilled in the art. The terminology used in the exemplary embodiments illustrated in the accompanying drawings is not intended to be limiting of the invention. In the drawings, like elements/components are referred to by like reference numerals.
Unless otherwise indicated, terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art. In addition, it will be understood that terms defined in commonly used dictionaries should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense.
Fig. 1 is a block diagram of a multi-layer oil-immersed panel sound absorption and noise reduction treatment device for 50Hz power frequency power equipment, wherein the multi-layer oil-immersed panel sound absorption and noise reduction treatment device is arranged on the inner side wall of a power equipment oil tank and consists of 20 groups of three-layer panel sound absorption modules, the device is paved on the inner side wall of the oil tank, the paving area of the device accounts for about 15% of the inner side wall of the oil tank, and the device is mainly distributed on the low-pressure side;
the panel sound absorption module includes:
the plate unit 101, the plate unit 101 is three layers, the first layer is an aluminum plate with the thickness of 2.5mm, the vertical distance between the 2.5mm aluminum plate and the inner side wall 104 of the oil tank is 10mm, the second layer is an aluminum plate with the thickness of 1.8mm, the distance between the 1.8mm aluminum plate and the 2.5mm aluminum plate is 15mm, the third layer is an insulating paperboard with the thickness of 3mm, the distance between the insulating paperboard and the front of the 1.8mm aluminum plate is 10mm, and the plane dimensions of the three layers of plates are 1800mm long and 400mm wide; the plate unit 101 is used for coupling with sound waves in oil;
the vibration reduction unit 102 is composed of 20 metal wire rope vibration absorbers, wherein 4 metal wire rope vibration absorbers are uniformly distributed between the inner side wall 104 of the oil tank and the 2.5mm aluminum plate of the plate unit 101, 6 metal wire rope vibration absorbers are uniformly distributed between the two layers of aluminum plates of the plate unit 101, 10 metal wire rope vibration absorbers are uniformly distributed between the 1.8mm aluminum plate of the plate unit 101 and the insulating paperboard, and two installation end surfaces of the vibration absorbers are vertically connected with the plates on the two sides and are used for reducing forced vibration outside the plane of the plate unit;
the supporting unit 103 is an insulating paper cushion block and angle steel, and is used for supporting and stably fixing the plate unit and keeping a fixed distance with the inner side wall 104 of the oil tank;
the multilayer panel sound absorption and noise reduction treatment device for the 50Hz power frequency power equipment mainly aims at the noise frequencies of 100Hz, 200Hz, 300Hz and 400Hz;
further, the grounding ends of the vibration reduction unit 102 and the plate unit 101 are connected with the grounding end of the inner side wall of the oil tank, and the grounding wire 105 is a copper wire;
further, the plate unit 101 may be a metal plate, an alloy plate, or a ceramic plate;
further, the maximum dimension of the plate unit 101 in the non-thickness direction is not less than 1/20 of the wavelength of the sound wave to be subjected to noise reduction treatment in the oil;
further, the vibration reduction unit 102 is a wire rope vibration reduction device, a wire vibration reduction device, an oil damping vibration reduction device or a rubber damping vibration reduction device;
further, the total rigidity of the vibration damping unit 102 in the direction perpendicular to the plate unit 101 is 1kN/mm or less per square meter;
further, the supporting module 103 is composed of an insulating paper cushion block and a fastener.
Fig. 2 is a block diagram of a single-layer oil-immersed panel sound absorption and noise reduction treatment device for 50Hz power frequency power equipment, wherein the single-layer oil-immersed panel sound absorption and noise reduction treatment device is arranged on the inner side wall of a power equipment oil tank and consists of 8 single-layer panel sound absorption modules, the device is paved on the inner side wall of the oil tank, the paving area of the device accounts for about 10% of the inner side wall of the oil tank, and the device is mainly distributed on a low-pressure side;
the panel sound absorption module includes:
the plate unit 201 is a single-layer composite silicon steel plate, the composite silicon steel plate is formed by stacking 6 layers of silicon steel plates with the thickness of 0.35mm, the plane dimension of the plate is 2000mm long and 600mm wide, the vertical distance between the composite silicon steel plate and the inner side wall 204 of the oil tank is 32mm, and the plate unit 201 is used for coupling with sound waves in oil liquid;
the vibration reduction unit 202 is composed of 6 oil damping vibration absorbers, the 6 oil damping vibration absorbers are uniformly distributed on the composite silicon steel plate and the inner side wall 204 of the oil tank, and two installation end faces of the vibration absorbers are vertically connected with the plates on two sides and are used for reducing forced vibration outside the plane of the plate unit 201;
the supporting unit 203 is an insulating paper cushion block and a fastener, and is used for supporting the plate unit 201 to be stably fixed and keeping a fixed distance from the inner side wall 204 of the oil tank; the method comprises the steps of carrying out a first treatment on the surface of the
The single-layer panel sound absorption and noise reduction treatment device for 50Hz power frequency power equipment in the specific embodiment mainly aims at the noise frequencies of 100Hz and 200Hz;
further, the grounding ends of the vibration reduction unit 202 and the plate unit are connected with the grounding end of the inner side wall of the oil tank, and the grounding wire 205 is a copper wire;
further, the plate unit 201 may be a metal plate, an alloy plate, an insulating cardboard or a ceramic plate;
further, the maximum dimension of the plate unit 201 in the non-thickness direction is not less than 1/20 of the wavelength of the sound wave to be noise-reduced in the oil;
further, the vibration damping unit 202 is a wire rope vibration damper, a wire vibration damper, an oil damping vibration damper or a rubber damping vibration damper;
further, the total rigidity of the vibration damping unit 202 in the direction perpendicular to the plate unit 201 is 1kN/mm or less per square meter;
further, the supporting module 203 is composed of an insulating paper pad and angle steel.
Fig. 3 is a flowchart of a method for performing sound absorption and noise reduction on an oil immersed panel according to an embodiment of the present invention.
An oil immersed panel sound absorption and noise reduction treatment method, the method comprising:
step 301, starting power equipment in an oil tank, detecting noise at a plurality of positions in the oil tank by using a sound level meter, and determining a position, in which the noise is higher than a preset threshold, in the plurality of positions;
step 302, closing electric equipment in the oil tank, and fixing a panel sound absorption module on the inner side wall of the oil tank at a position where noise is higher than a preset threshold value, wherein the panel sound absorption module is parallel to the inner side wall of the oil tank;
step 303, starting the power equipment in the oil tank, and when noise generated by the power equipment propagates to the panel sound absorption module, absorbing all or part of the noise by the panel sound absorption module;
further, a plurality of panel sound absorption modules are overlapped and arranged at the position with higher noise, and a single panel sound absorption module is arranged at the position with lower noise; the plurality of panel sound absorption modules are arranged horizontally with respect to each other.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (5)
1. An oil immersed panel sound absorption and noise reduction treatment device is arranged on the inner side wall of an oil tank of electric equipment and comprises one or more panel sound absorption modules, wherein each panel sound absorption module comprises at least one plate unit, one or more vibration reduction units and a supporting unit; the panel sound absorption modules are arranged on the inner side wall of the oil tank in a combined arrangement mode, and the plate units of the panel sound absorption modules are parallel to the inner side wall of the oil tank; the other installation end face of the vibration reduction unit of the panel sound absorption module is vertically connected with the inner side wall of the oil tank, the supporting unit is fixed between the plate unit and the inner side wall of the oil tank, and the distance between the plate unit of each panel sound absorption module and the inner side wall of the oil tank is equal;
the plate unit is used for coupling with sound waves in the oil liquid; the plate unit is a metal plate, an alloy plate, an insulating paperboard or a ceramic plate; the maximum dimension of the plate unit in the non-thickness direction is not less than 1/20 of the wavelength of sound waves to be subjected to noise reduction treatment in the oil liquid; when the plate unit is a metal plate or an alloy plate, the plate unit is grounded, and the grounding end of the plate unit is connected with the grounding end of the inner side wall of the oil tank;
the vibration reduction unit is vertically connected with the plate unit on one installation end surface and is used for reducing forced vibration outside the plane of the panel of the plate unit; the vibration reduction units are uniformly arranged on the plate units; the vibration reduction unit is a metal wire rope vibration reduction device, a metal wire vibration reduction device, an oil damping vibration reduction device or a rubber damping vibration reduction device; the total rigidity of the vibration reduction unit in the direction perpendicular to the plate unit is less than or equal to 1kN/mm per square meter;
the supporting unit is used for supporting the plate unit to be stably fixed and keeping a fixed distance from the inner side wall of the oil tank, so that oil can completely infiltrate into a cavity between the inner side wall of the tank and the plate unit; the supporting unit comprises an insulating paper cushion block and angle steel, or comprises an insulating paper cushion block and a fastener.
2. The apparatus according to claim 1, wherein: the combination arrangement mode of the panel sound absorption modules is that any two or more of the panel sound absorption modules are overlapped, so that oil can be completely immersed into the cavities between the inner side wall of the box body and the plate units and between the plate units; the other installation end face of the vibration reduction unit of the overlapped lowest panel sound absorption module is vertically connected with the inner side wall of the oil tank, and the supporting unit is fixed between the plate unit and the inner side wall of the oil tank; the other end mounting end face of the vibration reduction unit of the panel sound absorption module of the non-lowest layer is vertically connected with the plate unit of the panel sound absorption module of the lower layer, and the supporting module is fixed between the plate unit and the lower plate unit.
3. A method of noise reduction using the oil-immersed panel sound absorption and noise reduction treatment apparatus according to any one of claims 1 to 2, the method comprising:
pre-fixing a panel sound absorption module on the inner side wall of the oil tank at a position with noise higher than a preset threshold value, wherein the panel sound absorption module is parallel to the inner side wall of the oil tank;
when noise emitted from the power equipment propagates to the panel sound absorption module, the panel sound absorption module absorbs all or part of the noise.
4. A method according to claim 3, characterized in that: before fixing the panel sound absorbing module on the inner side wall of the oil tank at the position where the noise is higher than the preset threshold value, the panel sound absorbing module further comprises:
and detecting noises at a plurality of positions in the oil tank when the electric power equipment in the oil tank is operated, and determining the position, in which the noises are higher than a preset threshold value, of the plurality of positions.
5. A method according to claim 3, characterized in that: a plurality of panel sound absorption modules are overlapped and arranged at the position with higher noise, and a single panel sound absorption module is arranged at the position with lower noise; the plurality of panel sound absorption modules are arranged horizontally with respect to each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710488651.3A CN107240490B (en) | 2017-06-23 | 2017-06-23 | Sound absorption and noise reduction treatment device and method for oil immersed panel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710488651.3A CN107240490B (en) | 2017-06-23 | 2017-06-23 | Sound absorption and noise reduction treatment device and method for oil immersed panel |
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| Publication Number | Publication Date |
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| CN107240490A CN107240490A (en) | 2017-10-10 |
| CN107240490B true CN107240490B (en) | 2024-03-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710488651.3A Active CN107240490B (en) | 2017-06-23 | 2017-06-23 | Sound absorption and noise reduction treatment device and method for oil immersed panel |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1154016A (en) * | 1965-08-24 | 1969-06-04 | Licentia Gmbh | A Transformer Tank having a Sound-Absorbing and Sound-Damping Wall |
| CN204885870U (en) * | 2015-08-10 | 2015-12-16 | 国网山西省电力公司大同供电公司 | Device of making an uproar falls in power equipment damping |
| CN105609264A (en) * | 2016-01-19 | 2016-05-25 | 江西理工大学 | Amorphous alloy oil-immersed transformer employing micro-perforated panels |
| CN206877812U (en) * | 2017-06-23 | 2018-01-12 | 中国电力科学研究院 | A kind of oil immersed type panel sqouynd absorption lowering noise processing unit |
-
2017
- 2017-06-23 CN CN201710488651.3A patent/CN107240490B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1154016A (en) * | 1965-08-24 | 1969-06-04 | Licentia Gmbh | A Transformer Tank having a Sound-Absorbing and Sound-Damping Wall |
| CN204885870U (en) * | 2015-08-10 | 2015-12-16 | 国网山西省电力公司大同供电公司 | Device of making an uproar falls in power equipment damping |
| CN105609264A (en) * | 2016-01-19 | 2016-05-25 | 江西理工大学 | Amorphous alloy oil-immersed transformer employing micro-perforated panels |
| CN206877812U (en) * | 2017-06-23 | 2018-01-12 | 中国电力科学研究院 | A kind of oil immersed type panel sqouynd absorption lowering noise processing unit |
Non-Patent Citations (1)
| Title |
|---|
| 油浸式电力变压器的噪声源及降噪对策;王瑜;赵建网;;电力环境保护(第03期);全文 * |
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