CN211791151U - Novel generator extension end grounding device - Google Patents
Novel generator extension end grounding device Download PDFInfo
- Publication number
- CN211791151U CN211791151U CN202020380841.0U CN202020380841U CN211791151U CN 211791151 U CN211791151 U CN 211791151U CN 202020380841 U CN202020380841 U CN 202020380841U CN 211791151 U CN211791151 U CN 211791151U
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- carbon brush
- carbon
- generator
- grounding
- fixedly connected
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Abstract
The utility model provides a novel generator stretches end ground connection device relates to electrical engineering technical field. The device comprises a plurality of carbon brushes and an external grounding wire; a plurality of carbon brush boxes, wherein a hollow cavity for accommodating the carbon brush is arranged inside the carbon brush boxes; the grounding ring is in contact with one end of the carbon brush; the support frame is fixedly connected with the carbon brush box through a connecting part; the proximity switches are fixedly connected with one side of the carbon brush box; the U-shaped protective cover is fixedly connected with the generator shell, covers the generator high-speed shaft, the grounding ring, the carbon brushes, the support frame and other parts, reduces the electric quantity flowing through each carbon brush under the opposite shaft current by adding a plurality of groups of carbon brushes, and effectively prolongs the service life of the carbon brushes; can avoid the carbon dust of ground connection carbon brush to float and cause bodily injury to maintainer in the air through installation U type protection casing, the generator high-speed shaft is the rotation position in addition, and personnel's contact can be avoided in the installation protection casing, improves the operation security.
Description
Technical Field
The utility model relates to an electrical engineering technical field especially relates to a novel generator stretches end ground device.
Background
Wind power generation refers to converting kinetic energy of wind into electric energy. Wind is an energy source without public nuisance, the wind power generation is very environment-friendly, and the generated electric energy is very huge, so that more and more countries pay more attention to the wind power generation. China is rich in wind energy resources, and the wind energy storage capacity capable of being developed and utilized is about 10 hundred million kW, wherein the wind energy storage capacity on the land of a Chinese wind farm is about 2.53 hundred million kW, and the wind energy storage capacity capable of being developed and utilized on the sea is about 7.5 hundred million kW, which is 10 hundred million kW in total.
At present, the damage of a double-fed generator bearing in operation of a wind power plant is caused by the bearing self-caused problem except for a small part, and the shaft current generated by a frequency converter is mostly used for damaging the bearing. High frequency bearing currents can be effectively eliminated by a suitable grounding system. At present, shaft extension end grounding systems are additionally arranged on double-fed wind driven generators, and by adopting the structure, current can be prevented from flowing through a bearing, so that the effects of changing a current loop of the bearing and releasing shaft current are achieved.
Through detection, the Chinese utility model with the application number of 201720500680.2 discloses a grounding device for a wind driven generator, which comprises two carbon brushes, an external grounding wire and a grounding wire, wherein the grounding wire is used for connecting the shaft current of a main shaft of the generator to the ground through the grounding wire; the two brush boxes are internally provided with hollow cavities for containing carbon brushes, and the carbon brushes are clamped with the hollow cavities of the brush boxes through pressure springs; the grounding ring is in contact with one end of the carbon brush; the support frame is fixedly connected with the brush box through a bolt and used for fixing the brush box and adjusting the effective contact area of the carbon brush and the grounding ring; the proximity switch is fixedly connected with one side of the brush box through a bolt, and an insulating plate is arranged between the proximity switch and the brush box. Two carbon brushes in this patent are installed on a support frame, lack the equipment protection casing and cause the potential safety hazard, and this patent is two sets of ground connection carbon brushes in addition, and carbon brush life is shorter, so time and the convenience of operation scene installation ground connection carbon brush seem especially important.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the problem that exists among the above-mentioned prior art, provide a novel generator and stretch end grounding device for solve potential safety hazard and cost of labor scheduling problem.
In order to achieve the above object, the utility model provides a following technical scheme:
a novel generator extension end grounding device comprises:
the carbon brushes are externally connected with a grounding wire, and are used for connecting the shaft current of the main shaft of the generator to the ground through the grounding wire;
the carbon brush box comprises at least more than 4 carbon brush boxes, wherein a hollow cavity for accommodating a carbon brush is arranged in each carbon brush box, and the carbon brush is clamped with the hollow cavity of each carbon brush box through a pressure spring;
the grounding ring is in contact with one end of the carbon brush;
the support frame is fixedly connected with the carbon brush box through a connecting component;
at least more than 4 proximity switches are fixedly connected with one side of each carbon brush box, and an insulating plate is arranged between each proximity switch and each carbon brush box;
the U-shaped protective cover is fixedly connected with the generator shell and covers the generator high-speed shaft, the grounding ring, the carbon brush box, the connecting component, the supporting frame and the proximity switch.
Furthermore, the grounding ring is formed by connecting two semicircular carbon steel rings with the same structure through bolts.
The utility model has the advantages that:
compared with the prior art, the invention reduces the electric quantity flowing through each carbon brush under the opposite shaft current by adding the plurality of groups of carbon brushes, effectively prolongs the service life of the carbon brushes, prolongs the replacement period of the carbon brushes, improves the utilization hours of the wind driven generator and reduces the maintenance times of workers; the U-shaped protective cover can prevent carbon powder of the grounding carbon brush from floating in the air to cause personal injury to maintenance personnel, and in addition, the high-speed shaft of the generator is a rotating part, the protective cover can prevent personnel from contacting, so that the operation safety is improved; the number of the grounding assemblies can be freely selected according to the rotating shaft requirement of the generator, and because only one carbon brush is arranged in each grounding assembly, the mounting positions of the plurality of grounding assemblies are flexible.
Drawings
Fig. 1 is a schematic structural view of a novel generator extension grounding device provided by the present invention;
fig. 2 is a schematic side view of the novel generator grounding device according to the present invention;
in the figure, the position of the upper end of the main shaft,
1. a U-shaped protective cover; 2. a generator housing; 3. a carbon brush; 4. a carbon brush box; 5. a connecting member; 6. A support frame; 7. a proximity switch; 8. a ground ring; 9. the generator high speed shaft.
Detailed Description
In order to make the technical solution of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying drawings.
Referring to fig. 1-2, the utility model provides a novel generator stretches end ground connection device, the concrete content is as follows:
a novel generator extension end grounding device comprises:
at least more than 4 carbon brushes 3 which are externally connected with a grounding wire and used for connecting the shaft current of the main shaft of the generator to the ground through the grounding wire;
the carbon brush box comprises at least more than 4 carbon brush boxes 4, wherein a hollow cavity for accommodating the carbon brush 3 is arranged in each carbon brush box 4, and the carbon brush 3 is clamped with the hollow cavity of each carbon brush box 4 through a pressure spring;
at least more than 4 proximity switches 7 are fixedly connected with one side of each carbon brush box 4, and an insulating plate is arranged between each proximity switch 7 and each carbon brush box 4;
the grounding ring 8 is in contact with one end of the carbon brush 3, and the grounding ring 8 is formed by connecting two semicircular carbon steel rings with the same structure through bolts.
The support frame 6 is fixedly connected with the carbon brush box 4 through a connecting part 5; the connecting part 5 can be parts such as a screw, a round pin, a gasket and the like;
the U-shaped protective cover 1 is fixedly connected with the generator shell 2, and the U-shaped protective cover 1 covers a generator high-speed shaft 9, a grounding ring 8, a carbon brush 3, a carbon brush box 4, a connecting component 5, a support frame 6 and a proximity switch 7.
In the working process, an installation shaft extension end grounding system is used for connecting a carbon control alarm line with a system, a U-shaped protective cover is installed on the generator shaft extension end grounding system, a grounding device is installed at the high-speed end of a generator and is close to the side of the generator, a grounding carbon brush forms a smooth oxidation film in the friction process, a grounding ring is protected from being corroded by shaft current, and the shaft current is effectively led into the ground. When the carbon brush is worn to a threshold value, the proximity switch is disconnected by electric shock and transmits a signal to the controller communication module through the signal wire, the controller communication module sends the signal to the server, and the server sends out carbon brush alarm.
In addition, the carbon brush 3 and the carbon brush box 4 can be added according to actual requirements, and only corresponding parts such as screws, round pins and gaskets need to be connected with the support frame 6.
Claims (2)
1. A novel generator extension end grounding device is characterized by comprising:
at least more than 4 carbon brushes (3) are externally connected with a grounding wire and used for connecting the shaft current of the main shaft of the generator to the ground through the grounding wire;
the carbon brush box comprises at least more than 4 carbon brush boxes (4), wherein a hollow cavity for accommodating the carbon brush (3) is arranged in each carbon brush box (4), and the carbon brush (3) is clamped with the hollow cavity of each carbon brush box (4) through a pressure spring;
the grounding ring (8) is in contact with one end of the carbon brush (3);
the support frame (6) is fixedly connected with the carbon brush box (4) through a connecting part (5);
at least more than 4 proximity switches (7) are fixedly connected with one side of each carbon brush box (4), and an insulating plate is arranged between each proximity switch (7) and each carbon brush box (4);
the U-shaped protective cover (1) is fixedly connected with the generator shell (2), and the U-shaped protective cover (1) covers the generator high-speed shaft (9), the grounding ring (8), the carbon brush (3), the carbon brush box (4), the connecting component (5), the supporting frame (6) and the proximity switch (7).
2. A novel generator extension end grounding device according to claim 1, characterized in that the grounding ring (8) is formed by two semicircular carbon steel rings with the same structure which are connected with each other through bolts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020380841.0U CN211791151U (en) | 2020-03-24 | 2020-03-24 | Novel generator extension end grounding device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020380841.0U CN211791151U (en) | 2020-03-24 | 2020-03-24 | Novel generator extension end grounding device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211791151U true CN211791151U (en) | 2020-10-27 |
Family
ID=72931488
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020380841.0U Expired - Fee Related CN211791151U (en) | 2020-03-24 | 2020-03-24 | Novel generator extension end grounding device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211791151U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112737226A (en) * | 2020-12-22 | 2021-04-30 | 国家电投集团江西电力工程有限公司南昌分公司 | Generator main shaft earthing device |
-
2020
- 2020-03-24 CN CN202020380841.0U patent/CN211791151U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112737226A (en) * | 2020-12-22 | 2021-04-30 | 国家电投集团江西电力工程有限公司南昌分公司 | Generator main shaft earthing device |
| CN112737226B (en) * | 2020-12-22 | 2022-10-18 | 国家电投集团江西电力工程有限公司南昌分公司 | Grounding device for large shaft of generator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20201027 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |