CN111140546A - Noise reduction equipment of transformer fan - Google Patents
Noise reduction equipment of transformer fan Download PDFInfo
- Publication number
- CN111140546A CN111140546A CN201911368756.0A CN201911368756A CN111140546A CN 111140546 A CN111140546 A CN 111140546A CN 201911368756 A CN201911368756 A CN 201911368756A CN 111140546 A CN111140546 A CN 111140546A
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- Prior art keywords
- noise reduction
- reduction device
- noise
- fan
- transformer fan
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
- F04D25/08—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/002—Details, component parts, or accessories especially adapted for elastic fluid pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/60—Mounting; Assembling; Disassembling
- F04D29/601—Mounting; Assembling; Disassembling specially adapted for elastic fluid pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/663—Sound attenuation
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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
- H01F27/08—Cooling; Ventilating
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Abstract
The application discloses equipment of making an uproar falls in transformer fan. Wherein, this equipment includes: the noise reduction device is used for reducing the noise generated by the transformer fan; the sliding rail is used for bearing the noise reduction device; and the controller is arranged on the noise reduction device and used for controlling the noise reduction device to move on the slide rail according to a preset path. This application has been solved because the noise eliminator of current transformer fan fixes at transformer fan front end, can not remove, need demolish installation noise eliminator when causing the fan to overhaul, leads to the great technical problem of fan maintenance work load.
Description
Technical Field
The application relates to the field of noise reduction of transformer fans, in particular to noise reduction equipment of a transformer fan.
Background
Due to the heat dissipation requirement, a 220kV power transformer fan is generally arranged outdoors, and the fan has a high noise level and often causes great influence on the living environment of surrounding residents. The fan noise of the 220kV power transformer is mainly controlled by a traditional fixed noise eliminator, the main principle is that sound waves are absorbed and energy is dissipated through traditional noise reduction materials in the noise eliminator, and the fan noise is reduced from spreading outwards by converting sound energy into heat energy.
The existing 220kV power transformer fan noise eliminator is designed to be a ventilation noise eliminator which is integrally fixed and cannot move at the front end of a fan. However, the ventilation noise eliminator used at present has the problem of difficulty in fan maintenance, and because the current ventilation noise eliminator is fixed at the front end of the fan of the power transformer and cannot move, the noise eliminator needs to be detached and installed every time the fan is maintained, and the workload is increased.
In view of the above problems, no effective solution has been proposed.
Disclosure of Invention
The embodiment of the application provides a transformer fan's equipment of making an uproar that falls to at least, solve because the silencing device of current transformer fan fixes at transformer fan front end, can not remove, need demolish installation silencing device when causing the fan to overhaul, lead to the great technical problem of fan maintenance work load.
According to an aspect of an embodiment of the present application, there is provided a noise reduction apparatus for a transformer blower, including: the noise reduction device is used for reducing the noise generated by the transformer fan; the sliding rail is used for bearing the noise reduction device; and the controller is arranged on the noise reduction device and used for controlling the noise reduction device to move on the slide rail according to a preset path.
Optionally, the noise reduction apparatus further comprises: and the balance supporting device is arranged between the slide rail and the noise reduction device and used for controlling the noise reduction device to keep balance in the moving process.
Optionally, the balancing support means comprises at least one of: gyroscopes, truss structures.
Optionally, the noise reduction apparatus further comprises: the mobile sensing device is arranged on the noise reduction device and used for identifying the moving distance between the initial position and the target position of the noise reduction device, wherein the initial position is the position where the noise reduction device is used for reducing the noise of the transformer fan, and the target position is the position where the noise reduction device is located when the transformer fan is maintained; the controller is also used for controlling the noise reduction device to move from the target position to the initial position according to the moving distance after the maintenance of the transformer fan is completed.
Optionally, the noise reducer is a sound absorbing material of micro-porous composite polyester fiber.
Optionally, the noise reducing means is a flap-type sheet structure.
Optionally, the noise reducing device is a sealing structure.
Optionally, the noise reduction apparatus further comprises: the fire damper is arranged at the front end of the air outlet of the noise reduction device and used for being closed when the fact that sparks are generated due to the fact that the transformer fan is in failure is detected; and the shutter shielding device is arranged at the front end of the air outlet of the noise reduction device and used for adjusting the opening and closing angle of the shutter on the shutter shielding device according to the running state of the transformer fan.
Optionally, the louver blocking device is configured to control an opening angle of the louver to be zero when the pressure fan stops operating; and under the condition that the air output of the pressure fan is smaller than a first preset threshold, controlling the opening angle of the shutter to be reduced to a second preset threshold.
According to another aspect of the embodiments of the present application, there is also provided a noise reduction device for a transformer blower, including: the noise reduction device is used for reducing the noise generated by the transformer fan; the sliding rail is used for bearing the noise reduction equipment; the controller is arranged on the noise reduction device and used for controlling the noise reduction device to move on the slide rail according to a preset path; the mobile sensing device is arranged on the noise reduction device and used for identifying the moving distance between the initial position and the target position of the noise reduction device, wherein the initial position is the position where the noise reduction device is used for reducing the noise of the transformer fan, and the target position is the position where the noise reduction device is located when the transformer fan is maintained; the controller is also used for controlling the noise reduction device to move from the target position to the initial position according to the moving distance after the maintenance of the transformer fan is completed.
In an embodiment of the present application, a noise reduction device for a transformer fan is provided, including: the noise reduction device is used for reducing the noise generated by the transformer fan; the sliding rail is used for bearing the noise reduction device; the controller, the setting is on the device of making an uproar falls, a device that is used for controlling to fall moves on the slide rail according to predetermineeing the route, through increasing the slide rail, the purpose of further extension noise eliminator's mobility performance has been reached, thereby transformer fan maintenance step has been simplified in the realization, the technical effect of transformer fan maintenance work load is reduced, and then solved because the noise eliminator of current transformer fan fixes at transformer fan front end, can not remove, need demolish installation noise eliminator when causing the fan to overhaul, lead to the great technical problem of fan maintenance work load.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
fig. 1 is a structural diagram of a noise reduction apparatus of a transformer fan according to an embodiment of the present application;
FIG. 2 is a block diagram of another noise reduction device for a transformer fan according to an embodiment of the present application;
FIG. 3 is a block diagram of another noise reduction device for a transformer fan according to an embodiment of the present application;
FIG. 4 is a block diagram of another noise reduction device for a transformer fan in accordance with an embodiment of the present application;
FIG. 5a is a side view of a noise reducing device according to an embodiment of the present application;
FIG. 5b is a top view of a noise reducing device according to an embodiment of the present application;
fig. 6 is a block diagram of another noise reduction apparatus for a transformer fan according to an embodiment of the present application.
Detailed Description
In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, apparatus, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
According to an embodiment of the present application, there is provided an embodiment of a noise reduction apparatus for a transformer fan, where it is noted that the steps illustrated in the flowchart of the drawings may be performed in a computer device such as a set of computer executable instructions, and that while a logical order is illustrated in the flowchart, in some cases the steps illustrated or described may be performed in an order different than here.
Fig. 1 is a structural diagram of a noise reduction device of a transformer blower according to an embodiment of the present application, and as shown in fig. 1, the device includes:
and the noise reduction device 10 is used for reducing the noise generated by the transformer fan.
A slide rail 12 for carrying the noise reducer 10.
And the controller 14 is arranged on the noise reducer 10 and used for controlling the noise reducer 10 to move on the slide rail according to a preset path.
According to an alternative embodiment of the application, in consideration of the fact that the noise reduction device (also referred to as a noise eliminator) 10 has a large volume and a large weight, a high-bearing electric slide rail system and an intelligent control system are added at the position where the noise eliminator 10 is in contact with the ground, tracks are laid, effective movement and electric control of the noise eliminator are guaranteed, the sliding speed of the electric slide rail system is not less than 2m/s, and intelligent sliding and sliding path adjustment can be performed according to actual operation needs on site.
Through the equipment, the purpose of further expanding the mobility of the noise eliminator is achieved by adding the slide rail, so that the maintenance steps of the transformer fan are simplified, and the technical effect of the maintenance workload of the transformer fan is reduced.
Fig. 2 is a structural diagram of another noise reduction device for a transformer blower according to an embodiment of the present application, and as shown in fig. 2, the device further includes: and the balance supporting device 16 is arranged between the slide rail 12 and the noise reduction device 10 and is used for controlling the noise reduction device to keep balance during the moving process.
According to an alternative embodiment of the present application, the balancing support means 16 comprises at least one of: gyroscopes, truss structures.
Considering the volume and weight of the noise reduction device 10, a noise elimination device supporting structure is designed and an intelligent balance system is additionally arranged between the noise reduction device 10 and the slide rail 12, and the noise elimination device is ensured not to overturn, swing and deform in the moving process by utilizing balance devices such as a gyroscope and the like and a truss structure.
Fig. 3 is a structural diagram of another noise reduction device for a transformer blower according to an embodiment of the present application, and as shown in fig. 3, the device further includes: the mobile sensing device 18 is arranged on the noise reducer 10 and is used for identifying the moving distance between the initial position and the target position of the noise reducer 10, wherein the initial position is the position where the noise reducer 10 is used for reducing the noise of the transformer fan, and the target position is the position where the noise reducer 10 is located when the transformer fan is maintained; the controller 16 is further configured to control the noise reducer 10 to move from the target position to the initial position according to the moving distance after the maintenance of the transformer fan is completed.
According to an optional embodiment of the application, the photoelectric sensing sensor and the program memory control system are utilized to limit and automatically recognize the moving range of the noise reduction device 10, so that the noise reduction device 10 can be moved to a proper position when the fan is maintained, and after the fan is maintained, the noise reduction device 10 can be automatically moved to an external designated position of an original fan, so that the noise and the air flow of the noise reduction device 10 are prevented from being leaked due to position deviation.
In some alternative embodiments of the present application, the noise reducer 10 employs a microcellular composite polyester fiber sound absorbing material.
Preferably, the noise reduction device 10 is made of a microporous composite polyester fiber sound absorption material with high noise reduction capacity, the sound absorption coefficient of the material in the low-frequency range of 100-500Hz can reach more than 0.9, the material has high temperature resistance and durability, the retention rate of the sound absorption performance after a high-temperature test can reach more than 90%, and the retention rate of the sound absorption performance after an accelerated aging test can reach more than 85%. The material of the kind has higher noise reduction durability, and compared with the traditional noise reduction material adopted in the past, the sound absorption performance is improved by more than 20%, and the high-temperature durability is improved by more than 30%.
In an alternative embodiment of the present application, the noise reducer 10 is a flap-type sheet structure.
According to an alternative embodiment of the present application, the noise reduction device 10 employs a folded plate type sheet-shaped noise elimination structure, which provides an absorption space for absorbing low-frequency sound waves to the maximum extent, so that the low-frequency sound absorption material with high noise reduction amount can exert the maximum sound absorption effect in the noise elimination structure. After the noise elimination structure is combined with the low-frequency sound absorption material for use, the noise elimination and reduction amount of the noise reduction device 10 in the low-frequency range of 100 Hz and 500Hz can reach more than 30dB, and is increased by more than 50% compared with the noise elimination amount of the traditional noise reduction material and the noise elimination structure, so that the noise elimination and reduction effect of the noise reduction device 10 is greatly improved.
According to an alternative embodiment of the present application, the noise reducer 10 is a sealed structure.
The noise reduction device 10 adopts a noise elimination sealing structure, effective acoustic sealing can be performed after the slide rail returns to the position of the front end of the fan, meanwhile, a necessary gap is provided for the sliding of the noise reduction device 10, and the abrasion and the damage of the sliding friction of the noise reduction device 10 to the front end of the fan are prevented. The noise elimination sealing structure can prevent sound wave leakage, so that the sound insulation quantity of the side wall of the noise reduction device 10 reaches more than 30 dB.
Fig. 4 is a structural diagram of another noise reduction device of a transformer blower according to an embodiment of the present application, and as shown in fig. 4, the noise reduction device further includes: the fire damper 110 is arranged at the front end of an air outlet of the noise reduction device 10 and is used for closing when the spark generated by the transformer fan due to failure is detected; and the shutter shielding device 112 is arranged at the front end of the air outlet of the noise reduction device 10 and is used for adjusting the opening and closing angle of the shutter on the shutter shielding device according to the running state of the transformer fan.
Optionally, a louver blocking device 112, configured to control an opening angle of the louvers to be zero in a case where the blower stops operating; and under the condition that the air output of the pressure fan is smaller than a first preset threshold, controlling the opening angle of the shutter to be reduced to a second preset threshold.
According to an optional embodiment of the present application, an intelligent control shielding front-end louver and a fire damper are disposed at the front end of the air outlet of the noise reduction device 10, and the shape of the front-end louver and the opening and closing of the fire damper can be automatically adjusted according to the use condition of the fan. When the fan generates fault smoke or sparks, the fire-proof valve is automatically closed to prevent oxygen from entering the noise reduction device, so that the fire disaster is prevented from further expanding; when the fan is closed, the shielding shutter at the front end of the noise reduction device is automatically closed, so that rainwater and dust are prevented from entering a channel of the noise reduction device to pollute a noise elimination structure and a sound absorption material; after the air quantity of the fan is reduced, the front end of the noise reduction device is used for shielding the opening angle of the shutter to be reduced, and the entering probability of dust and rainwater is reduced.
The transformer fan noise reduction equipment provided by the embodiment of the application is based on the existing 220kV power transformer fan external noise reduction device, through structural design and material improvement, the movability of the noise reduction device is further expanded, the noise elimination and noise reduction performance of the noise reduction device is improved, so that the flexible movement and the high-efficiency noise elimination characteristic of the noise reduction device are realized, and the technical support is better provided for fan maintenance and noise reduction.
The noise reduction equipment can be used for any 220kV power transformer fan, can improve the noise elimination and reduction capability and the overhaul convenience of the 220kV power transformer fan, can control and treat the noise of the 220kV power transformer fan in an all-around manner according to the pertinence, the effectiveness and the accuracy, and saves the treatment cost.
Fig. 5a is a side view and fig. 5b is a top view of a noise reducing apparatus according to an embodiment of the present application. As shown in fig. 5a or fig. 5b, the silencer in the figure is the above-mentioned noise reduction device 10, and the movable slide rail is the above-mentioned slide rail 12, and it can be seen from fig. 5a that the silencer is arranged at the outlet of the transformer fan through the movable slide rail, and the movable performance of the silencer can be expanded through moving the slide rail. The rain-proof shutter shown in the figures is the shutter device 112 mentioned above.
Fig. 6 is a block diagram of another noise reduction apparatus for a transformer blower according to an embodiment of the present application, and as shown in fig. 6, the apparatus includes:
and the noise reduction device 60 is used for reducing the noise generated by the transformer fan.
And the sliding rail 62 is used for bearing noise reduction equipment.
And the controller 64 is arranged on the noise reduction device 60 and used for controlling the noise reduction device to move on the slide rail according to a preset path.
The mobile sensing device 66 is arranged on the noise reduction device and is used for identifying the moving distance between the initial position and the target position of the noise reduction device, wherein the initial position is the position where the noise reduction device is used for reducing the noise of the transformer fan, and the target position is the position where the noise reduction device is located when the transformer fan is maintained; the controller is also used for controlling the noise reduction device to move from the target position to the initial position according to the moving distance after the maintenance of the transformer fan is completed.
It should be noted that, reference may be made to the description related to the embodiments shown in fig. 1 to 4 for a preferred implementation of the embodiment shown in fig. 6, and details are not repeated here.
The above-mentioned serial numbers of the embodiments of the present application are merely for description and do not represent the merits of the embodiments.
In the above embodiments of the present application, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
In the embodiments provided in the present application, it should be understood that the disclosed technology can be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units may be a logical division, and in actual implementation, there may be another division, for example, multiple units or components may be combined or integrated into another device, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, units or modules, and may be in an electrical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application may be substantially implemented or contributed to by the prior art, or all or part of the technical solution may be embodied in a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic or optical disk, and other various media capable of storing program codes.
The foregoing is only a preferred embodiment of the present application and it should be noted that those skilled in the art can make several improvements and modifications without departing from the principle of the present application, and these improvements and modifications should also be considered as the protection scope of the present application.
Claims (10)
1. The utility model provides a transformer fan's equipment of making an uproar falls which characterized in that includes:
the noise reduction device is used for reducing the noise generated by the transformer fan;
the sliding rail is used for bearing the noise reduction device;
and the controller is arranged on the noise reduction device and used for controlling the noise reduction device to move on the slide rail according to a preset path.
2. The apparatus of claim 1, wherein the noise reduction apparatus further comprises:
and the balance supporting device is arranged between the slide rail and the noise reduction device and is used for controlling the noise reduction device to keep balance in the moving process.
3. The apparatus of claim 2, wherein the balancing support means comprises at least one of:
gyroscopes, truss structures.
4. The apparatus of claim 1, wherein the noise reduction apparatus further comprises:
the mobile sensing device is arranged on the noise reduction device and used for identifying the moving distance between the initial position and the target position of the noise reduction device, wherein the initial position is the position where the noise reduction device is used for reducing the noise of the transformer fan, and the target position is the position where the noise reduction device is located when the transformer fan is maintained;
the controller is further used for controlling the noise reduction device to move from the target position to the initial position according to the moving distance after the maintenance of the transformer fan is completed.
5. The apparatus of claim 1, wherein the noise reducing device is a sound absorbing material of micro-porous composite polyester fiber.
6. The apparatus according to any one of claims 1 to 5, wherein the noise reducing means is a flap-type sheet structure.
7. The apparatus of any one of claims 1 to 5, wherein the noise reducing means is a sealing structure.
8. The apparatus of claim 1, wherein the noise reduction apparatus further comprises:
the fire damper is arranged at the front end of an air outlet of the noise reduction device and used for being closed when the fact that sparks are generated due to the fact that the transformer fan is in failure is detected;
and the shutter shielding device is arranged at the front end of the air outlet of the noise reduction device and used for adjusting the opening and closing angle of the shutter on the shutter shielding device according to the running state of the transformer fan.
9. The apparatus of claim 8,
the shutter shielding device is used for controlling the opening angle of the shutter to be zero under the condition that the pressure fan stops running; and under the condition that the air output of the pressure fan is smaller than a first preset threshold value, controlling the opening angle of the louver to be reduced to a second preset threshold value.
10. The utility model provides a transformer fan's equipment of making an uproar falls which characterized in that includes:
the noise reduction device is used for reducing the noise generated by the transformer fan;
the sliding rail is used for bearing the noise reduction equipment;
the controller is arranged on the noise reduction device and used for controlling the noise reduction device to move on the slide rail according to a preset path;
the mobile sensing device is arranged on the noise reduction device and used for identifying the moving distance between the initial position and the target position of the noise reduction device, wherein the initial position is the position where the noise reduction device is used for reducing the noise of the transformer fan, and the target position is the position where the noise reduction device is located when the transformer fan is maintained;
the controller is further used for controlling the noise reduction device to move from the target position to the initial position according to the moving distance after the maintenance of the transformer fan is completed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911368756.0A CN111140546A (en) | 2019-12-26 | 2019-12-26 | Noise reduction equipment of transformer fan |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911368756.0A CN111140546A (en) | 2019-12-26 | 2019-12-26 | Noise reduction equipment of transformer fan |
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| CN111140546A true CN111140546A (en) | 2020-05-12 |
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|---|---|---|---|
| CN201911368756.0A Pending CN111140546A (en) | 2019-12-26 | 2019-12-26 | Noise reduction equipment of transformer fan |
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| CN111696768A (en) * | 2020-05-13 | 2020-09-22 | 云南电网有限责任公司 | Outdoor transformer noise reduction method |
| CN113654978A (en) * | 2021-08-25 | 2021-11-16 | 全球能源互联网研究院有限公司 | Oil-immersed sound vibration suppression damping rubber sound insulation performance evaluation method and application thereof |
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| CN111696768A (en) * | 2020-05-13 | 2020-09-22 | 云南电网有限责任公司 | Outdoor transformer noise reduction method |
| CN113654978A (en) * | 2021-08-25 | 2021-11-16 | 全球能源互联网研究院有限公司 | Oil-immersed sound vibration suppression damping rubber sound insulation performance evaluation method and application thereof |
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