CN117655002B - Generator excitation brush holder cleaning device - Google Patents
Generator excitation brush holder cleaning deviceInfo
- Publication number
- CN117655002B CN117655002B CN202311579733.0A CN202311579733A CN117655002B CN 117655002 B CN117655002 B CN 117655002B CN 202311579733 A CN202311579733 A CN 202311579733A CN 117655002 B CN117655002 B CN 117655002B
- Authority
- CN
- China
- Prior art keywords
- cleaning
- brush holder
- brush
- negative pressure
- generator excitation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B5/00—Cleaning by methods involving the use of air flow or gas flow
- B08B5/04—Cleaning by suction, with or without auxiliary action
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B13/00—Accessories or details of general applicability for machines or apparatus for cleaning
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
Landscapes
- Cleaning In General (AREA)
Abstract
本发明公开了一种发电机励磁刷握清洁装置，属于发电机技术领域。本发明的发电机励磁刷握清洁装置，在将刷握从箱口插入清洁腔的同时，可使柱体插入碳刷盒内，进而利用背面清洁刷对刷握的背面进行清扫，利用两个侧面清洁刷对刷握的两个侧面进行清扫，并利用内壁清洁刷清扫碳刷盒的内壁；同时，通过负压机构使负压腔形成负压，不仅能对清洁腔内的空气进行抽吸，还能将柱体周围的空气通过吸尘孔及内腔吸入清洁腔，并利用位于清洁腔与负压腔之间的过滤件吸附浮尘，不仅提高了刷握清扫效率，而且减少了扬尘，节省了刷握的清扫时间成本，实现了刷握的高效清洁。
This invention discloses a generator excitation brush holder cleaning device, belonging to the field of generator technology. The generator excitation brush holder cleaning device of this invention allows the brush holder to be inserted into the cleaning chamber from the box opening, while simultaneously inserting the column into the carbon brush box. A back cleaning brush cleans the back of the brush holder, two side cleaning brushes clean the two sides of the brush holder, and an inner wall cleaning brush cleans the inner wall of the carbon brush box. Simultaneously, a negative pressure mechanism creates a negative pressure chamber, which not only draws air from the cleaning chamber but also draws air from around the column into the cleaning chamber through the dust suction hole and the inner cavity. A filter located between the cleaning chamber and the negative pressure chamber adsorbs floating dust, improving brush holder cleaning efficiency, reducing dust generation, saving cleaning time and costs, and achieving highly efficient brush holder cleaning.
Description
Technical Field
The invention relates to the technical field of generators, in particular to a generator excitation brush holder cleaning device.
Background
The process of supplying dc current to the generator rotor windings is known as excitation, and there are two main modes of excitation, namely rotary commutated excitation (brushless excitation) and static commutated excitation (brush excitation). The current excitation mode of the large-scale turbogenerator or the hydraulic generator is static excitation, namely, the rectified direct current is transmitted to a generator rotor winding through a carbon brush and a collecting ring device.
During normal operation of the generator, the excitation carbon brush is always in a dynamic abrasion state, carbon powder under abrasion is sucked into the carbon powder collecting device under the action of the collecting ring centrifugal fan, in the process, environmental dust is inevitably sucked and stained on the excitation brush holder, dust is accumulated in the brush holder to cause carbon brush jamming, the carbon brush contact resistance is increased, and current distribution is affected to cause a series of adverse results such as ignition.
The carbon brush, the collecting ring, the brush holder and dust on the surface of the brush holder are dirty, so that clearance fit and heat dissipation of the carbon brush and the brush holder are affected, and in order to avoid a series of losses caused by unbalanced current of the excitation carbon brush due to dirt, the excitation device needs to be cleaned regularly. At present, the conventional method aims at cleaning the exciting brush holder by manually cleaning the exciting brush holder by using a brush, and the problems of more dust, low cleaning efficiency, long time consumption and incomplete cleaning exist in the cleaning process.
Disclosure of Invention
The invention aims to provide the generator excitation brush holder cleaning device which improves the brush holder cleaning efficiency, reduces dust emission, saves the cleaning time cost of the brush holder and realizes the efficient cleaning of the brush holder.
In order to achieve the above object, the following technical scheme is provided:
Generator excitation brush holder cleaning device includes:
the box body is provided with a box opening for the brush holder to enter and exit, a filter piece is arranged in the box body, and the filter piece divides the interior of the box body into a cleaning cavity and a negative pressure cavity positioned below the cleaning cavity;
a negative pressure mechanism capable of making the negative pressure chamber negative pressure;
the panel cleaning structure is arranged in the cleaning cavity and comprises a back cleaning brush and two side cleaning brushes, the back cleaning brush is used for cleaning the back of the brush holder, and the two side cleaning brushes are respectively used for cleaning the two side surfaces of the brush holder;
The carbon brush box cleaning structure comprises a column body and an inner wall cleaning brush, wherein the column body can extend into the carbon brush box corresponding to the column body, the inner wall cleaning brush is arranged on the column body, the inner wall cleaning brush is used for cleaning the inner wall of the carbon brush box, an inner cavity communicated with the cleaning cavity is formed in the column body, and dust collection holes communicated with the inner cavity are formed in the column body.
As the alternative scheme of generator excitation brush holder cleaning device, the panel cleaning structure still includes with the back backup pad that the back of brush holder corresponds the setting, the back backup pad set firmly in clean chamber, the back cleaning brush set firmly in the back backup pad.
As the alternative scheme of generator excitation brush holder cleaning device, the panel cleaning structure still includes two with two side backup pads that the side one-to-one set up of brush holder, two the side backup pad all set firmly in clean chamber, two the side cleaning brush sets firmly respectively in two the side backup pad.
As an alternative to the generator excitation brush holder cleaning device, both of the side support plates are provided with a plurality of the side cleaning brushes.
As an alternative to the generator excitation brush holder cleaning device, the back support plate is provided with a back plate through hole, and/or,
The side support plates are provided with side plate through holes.
As an alternative scheme of the generator excitation brush holder cleaning device, the inner wall cleaning brush is of an annular structure wound on the outer side of the cylinder.
As an alternative scheme of the generator excitation brush holder cleaning device, the negative pressure mechanism comprises a vacuum pump, and the vacuum pump is connected with the negative pressure cavity.
As an alternative scheme of the generator excitation brush holder cleaning device, the negative pressure mechanism further comprises a negative pressure pipeline connected with the vacuumizing pump, the negative pressure pipeline is arranged in the negative pressure cavity, and the negative pressure pipeline is provided with a plurality of negative pressure through holes communicated with the negative pressure cavity.
As an alternative to the generator excitation brush holder cleaning device, the generator excitation brush holder cleaning device further includes a battery electrically connected to the vacuum pump.
As an alternative to the generator excitation brush holder cleaning device, the filter member is detachably provided in the case.
Compared with the prior art, the invention has the beneficial effects that:
According to the generator excitation brush holder cleaning device, when the brush holder is inserted into the cleaning cavity from the box opening, the cylinder can be inserted into the carbon brush box, the back surface of the brush holder is cleaned by the back surface cleaning brush, the two side surfaces of the brush holder are cleaned by the two side surface cleaning brushes, the inner wall of the carbon brush box is cleaned by the inner wall cleaning brush, meanwhile, the negative pressure cavity is formed into negative pressure by the negative pressure mechanism, not only can air in the cleaning cavity be sucked, but also air around the cylinder can be sucked into the cleaning cavity through the dust suction hole and the inner cavity, floating dust is adsorbed by the filter element arranged between the cleaning cavity and the negative pressure cavity, so that the brush holder cleaning efficiency is improved, dust emission is reduced, the cleaning time cost of the brush holder is saved, and the high-efficiency cleaning of the brush holder is realized.
Drawings
FIG. 1 is a schematic diagram showing a relationship between a brush holder and a carbon brush in the prior art;
FIG. 2 is a second schematic diagram of a brush holder and carbon brush according to the prior art;
FIG. 3 is a schematic diagram of a generator excitation brush holder cleaning apparatus according to an embodiment of the present invention;
Fig. 4 is a schematic diagram of a second structure of the generator excitation brush holder cleaning device according to the embodiment of the invention.
Reference numerals:
100. brush holder 101, handle 102, back surface 103, side surface 104, carbon brush box 200, carbon brush;
1. The vacuum cleaner comprises a box body, 11, a box opening, 12, a cleaning cavity, 13, a negative pressure cavity, 2, a negative pressure mechanism, 21, a vacuum pump, 22, a negative pressure pipeline, 221, a negative pressure through hole, 3, a panel cleaning structure, 31, a back cleaning brush, 32, a side cleaning brush, 33, a back supporting plate, 331, a back plate through hole, 34, a side supporting plate, 341, a side plate through hole, 35, a shell, 4, a carbon brush box cleaning structure, 41, a cylinder, 42, an inner wall cleaning brush, 43, an inner cavity, 44, a dust suction hole, 5, a filter, 6, a switch, 7 and a battery.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that like reference numerals and letters refer to like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the present invention, it should be noted that, directions or positional relationships indicated by terms such as "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships conventionally put in use of the inventive product, are merely for convenience of describing the present invention and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific direction, be configured and operated in a specific direction, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance. In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present invention, it should also be noted that, unless explicitly stated and limited otherwise, the terms "disposed" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, integrally connected, mechanically connected, or electrically connected. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
In the present invention, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.
As shown in fig. 1-2, the carbon brush 200 is inserted into the carbon brush box 104 of the brush holder 100, and conventionally, the back surface 102, the side surface 103, and the carbon brush box 104 of the brush holder 100 are manually cleaned by using a brush, so that dust is more, cleaning efficiency is low, time is long, and cleaning is not thorough.
In order to solve the above-described problems, as shown in fig. 3 to 4, the present embodiment provides a generator exciting brush holder cleaning device including a case 1, a negative pressure mechanism 2, a panel cleaning structure 3, and a plurality of brush box cleaning structures 4.
The box 1 is provided with a box opening 11 for the brush holder 100 to enter and exit, a filter element 5 is arranged in the box 1, and the filter element 5 divides the interior of the box 1 into a cleaning cavity 12 and a negative pressure cavity 13 positioned below the cleaning cavity 12.
The negative pressure mechanism 2 can make the negative pressure chamber 13 form a negative pressure.
The panel cleaning structure 3 is provided in the cleaning chamber 12, and the panel cleaning structure 3 includes a back cleaning brush 31 and two side cleaning brushes 32, the back cleaning brush 31 being used for cleaning the back surface 102 of the brush holder 100, the two side cleaning brushes 32 being respectively used for cleaning the two side surfaces 103 of the brush holder 100.
The carbon brush box cleaning structures 4 are arranged on the outer side of the box body 1, the carbon brush box cleaning structures 4 are arranged in one-to-one correspondence with the carbon brush boxes 104 of the brush holder 100, the carbon brush box cleaning structures 4 comprise a column 41 and an inner wall cleaning brush 42, the column 41 can extend into the carbon brush box 104 corresponding to the carbon brush box cleaning structures, the inner wall cleaning brush 42 is arranged on the column 41, the inner wall cleaning brush 42 is used for cleaning the inner wall of the carbon brush box 104, an inner cavity 43 communicated with the cleaning cavity 12 is arranged in the column 41, and dust collection holes 44 communicated with the inner cavity 43 are formed in the column 41.
The brush holder 100 is inserted into the cleaning cavity 12 from the box opening 11, the cylinder 41 can be inserted into the carbon brush box 104, the back surface 102 of the brush holder 100 is cleaned by the back surface cleaning brush 31, the two side surfaces 103 of the brush holder 100 are cleaned by the two side surface cleaning brushes 32, the inner wall of the carbon brush box 104 is cleaned by the inner wall cleaning brush 42, meanwhile, the negative pressure cavity 13 is formed into negative pressure by the negative pressure mechanism 2, not only can the air in the cleaning cavity 12 be sucked, but also the air around the cylinder 41 can be sucked into the cleaning cavity 12 through the dust suction hole 44 and the inner cavity 43, floating dust is adsorbed by the filter element 5 positioned between the cleaning cavity 12 and the negative pressure cavity 13, so that the cleaning efficiency of the brush holder 100 is improved, dust emission is reduced, the cleaning time cost of the brush holder 100 is saved, and the high-efficiency cleaning of the brush holder 100 is realized.
In this embodiment, the filter element 5 has a plate-like structure, and the filter element 5 is illustratively a dust filter screen in the prior art, however, the filter element 5 may also be a composite filter element in the prior art, which is not limited herein.
Optionally, the back cleaning brush 31 is elongated to facilitate cleaning of the entire back 102 of the brush holder 100.
Optionally, the side cleaning brush 32 is elongated to facilitate a thorough cleaning of the sides 103 of the brush holder 100.
Optionally, the panel cleaning structure 3 further includes a back support plate 33 disposed corresponding to the back 102 of the brush holder 100, the back support plate 33 is fixedly disposed in the cleaning cavity 12, and the back cleaning brush 31 is fixedly disposed in the back support plate 33. The back support plate 33 can be used to support the back 102 of the brush holder 100 when the brush holder 100 is inserted into the cleaning chamber 12, thereby reducing the labor intensity of operators.
Optionally, the panel cleaning structure 3 further includes two side support plates 34 disposed in one-to-one correspondence with the two sides 103 of the brush holder 100, the two side support plates 34 are both fixedly disposed in the cleaning cavity 12, and the two side cleaning brushes 32 are respectively fixedly disposed in the two side support plates 34. When the brush holder 100 is inserted into the cleaning chamber 12, the two side support plates 34 can be used to support the two sides 103 of the brush holder 100, respectively, so as to reduce the labor intensity of operators. It should be noted that, the two side surfaces 103 of the brush holder 100 are both disposed obliquely, and further, the two side support plates 34 are also disposed obliquely, so that the side support plates 34 can closely fit the corresponding side surfaces 103 of the brush holder 100, so as to provide stable support for the two side surfaces 103 of the brush holder 100.
Alternatively, the back support plate 33 is provided with a back plate through hole 331. When the air in the cleaning chamber 12 is sucked by the negative pressure formed in the negative pressure chamber 13, an air flow can be formed in the cleaning chamber 12 and can circulate through the back plate through hole 331, so that the back support plate 33 is prevented from blocking the air flow and affecting the dust collection effect.
Optionally, the number of the through holes 331 is increased, so as to facilitate airflow and achieve better dust removal effect.
Alternatively, the side support plates 34 are provided with side plate through holes 341. When the air in the cleaning cavity 12 is sucked through the negative pressure formed in the negative pressure cavity 13, air flow can be formed in the cleaning cavity 12 and can circulate through the side plate through holes 341, so that the side support plates 34 are prevented from blocking the air flow, and the dust collection effect is prevented from being influenced.
Optionally, curb plate through-hole 341 is equipped with a plurality ofly, through increasing the quantity of curb plate through-hole 341, helps promoting the air current circulation, and the dust removal effect is better.
Optionally, the panel cleaning structure 3 further includes a connecting plate, where the connecting plate, the back support plate 33, and the two side support plates 34 are connected to form a housing 35 with one open end, and the opening of the housing 35 is disposed corresponding to the case opening 11, and supports the brush holder 100 through the housing 35, so that stability is higher.
Alternatively, both side support plates 34 are provided with a plurality of side cleaning brushes 32, and the side 103 of the brush holder 100 is cleaned simultaneously by the plurality of side cleaning brushes 32, thereby achieving better effect and higher efficiency.
Alternatively, the inner wall cleaning brush 42 is a ring-shaped structure wound around the outside of the cylinder 41. Therefore, the inner wall of the carbon brush box 104 can be comprehensively cleaned only by arranging one inner wall cleaning brush 42, and the carbon brush box is simple in structure and good in effect.
Alternatively, the negative pressure mechanism 2 includes a vacuum pump 21, and the vacuum pump 21 is connected to the negative pressure chamber 13 so that a negative pressure is formed in the negative pressure chamber 13 by the vacuum pump 21.
Optionally, the generator excitation brush holder cleaning device further comprises a switch 6, the switch 6 is arranged on the outer side of the box body 1, the switch 6 is electrically connected with the vacuumizing pump 21, the vacuumizing pump 21 is controlled to start or stop through the switch 6, and the operation is convenient.
Optionally, the negative pressure mechanism 2 further includes a negative pressure pipeline 22 connected to the vacuum pump 21, the negative pressure pipeline 22 is disposed in the negative pressure cavity 13, and the negative pressure pipeline 22 is provided with a plurality of negative pressure through holes 221 communicating with the negative pressure cavity 13. Therefore, uniform negative pressure can be formed in the negative pressure cavity 13, the dust removal efficiency is high, and the dust removal effect is better.
Optionally, the generator excitation brush holder cleaning device further includes a battery 7, and the battery 7 is electrically connected to the vacuum pump 21. The battery 7 is used for supplying power to the vacuumizing pump 21, an external power supply is not needed, the generator excitation brush holder cleaning device is convenient to move, and portable cleaning can be achieved. The battery 7 is an accumulator 7, for example.
Optionally, the filter element 5 is detachably arranged in the box 1, so that the filter element 5 can be quickly disassembled and assembled, and the filter element 5 can be replaced periodically.
Illustratively, the case 1 is provided with a chute, and the filter 5 is provided with a connecting portion that can slide in or out of the chute in the horizontal direction, thereby achieving quick assembly and disassembly of the filter 5.
Illustratively, the working principle of the generator excitation brush holder cleaning device of the present embodiment is:
1) Removing the carbon brush 200 from the carbon brush box 104;
2) The switch 6 is turned on, the vacuumizing pump 21 is controlled to start, and the negative pressure cavity 13 is vacuumized;
3) The brush holder 100 is inserted into the cleaning chamber 12 from the case mouth 11 by manually grasping the handle 101 of the brush holder 100, while the column 41 is inserted into the carbon brush box 104, and then the brush holder 100 is pulled up;
4) Repeating the step 3) until no obvious dust is generated on the surface of the brush holder 100;
5) The switch 6 is closed, the brush holder 100 is cleaned, and the filter element 5 is only required to be replaced periodically.
Note that the above is only a preferred embodiment of the present invention and the technical principle applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, while the invention has been described in connection with the above embodiments, the invention is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the invention, which is set forth in the following claims.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311579733.0A CN117655002B (en) | 2023-11-24 | 2023-11-24 | Generator excitation brush holder cleaning device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311579733.0A CN117655002B (en) | 2023-11-24 | 2023-11-24 | Generator excitation brush holder cleaning device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN117655002A CN117655002A (en) | 2024-03-08 |
| CN117655002B true CN117655002B (en) | 2025-11-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202311579733.0A Active CN117655002B (en) | 2023-11-24 | 2023-11-24 | Generator excitation brush holder cleaning device |
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| CN (1) | CN117655002B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN119098413B (en) * | 2024-11-08 | 2025-04-11 | 苏州仕科泰新材料科技有限公司 | A stainless steel plate surface cleaning device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117411256A (en) * | 2023-11-27 | 2024-01-16 | 国核示范电站有限责任公司 | Generator excitation carbon brush replacement device |
| CN117728262A (en) * | 2024-01-31 | 2024-03-19 | 国核示范电站有限责任公司 | Cleaning device for excitation brush holder |
| CN221387967U (en) * | 2023-11-24 | 2024-07-23 | 国核示范电站有限责任公司 | Generator excitation brush holder cleaning device |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR200182541Y1 (en) * | 1997-12-30 | 2000-06-01 | 김형국 | Generator collector ring polishing device |
| CN208890580U (en) * | 2018-11-29 | 2019-05-21 | 张宏伟 | Collector ring of generator and dust gathering arrester automatic cleaning device |
| CN216699754U (en) * | 2021-12-08 | 2022-06-07 | 南水北调东线江苏水源有限责任公司 | Automatic cleaning device for carbon brush carbon powder of horizontal synchronous motor of large pump station |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN221387967U (en) * | 2023-11-24 | 2024-07-23 | 国核示范电站有限责任公司 | Generator excitation brush holder cleaning device |
| CN117411256A (en) * | 2023-11-27 | 2024-01-16 | 国核示范电站有限责任公司 | Generator excitation carbon brush replacement device |
| CN117728262A (en) * | 2024-01-31 | 2024-03-19 | 国核示范电站有限责任公司 | Cleaning device for excitation brush holder |
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