Grounding device of generator main shaft

Abstract

The utility model belongs to the technical field of electric power systems, and particularly relates to a grounding device of a generator main shaft, which comprises a mounting assembly, a grounding assembly, a grounding assembly, a grounding assembly and a grounding assembly, and is characterized in that the mounting assembly comprises a mounting plate, a mounting rack and mounting screw holes; the adjusting assembly comprises a supporting plate arranged on one side of the mounting plate, a threaded sleeve arranged at the top of the supporting plate, a threaded rod arranged in an inner cavity of the threaded sleeve and a hand wheel arranged at the top of the threaded rod; an electric brush assembly, comprising a fixing plate arranged at the bottom of a threaded rod, expansion plates arranged on the two sides of the fixing plate, a carbon brush body arranged at the bottom of the fixing plate, expansion carbon brushes arranged at the bottoms of the expansion plates, copper braids arranged at the tops of the carbon brush body and the expansion carbon brushes, a curved frame arranged on one side of the fixing plate and a grounding copper brush arranged at the bottom of the curved frame. The structure is reasonable, the contact area and the conductivity are increased in the using process, and the sparking phenomenon can be prevented in the using process.

Description

Technical Field

[0001] The utility model relates to the technical field of electric power systems, in particular to a grounding device for a main shaft of a generator. Background Art

[0002] The generator generates heat due to internal losses when working. The cooling medium cools its windings and core to maintain the temperature of each part within the allowable limit, extending the life of the generator and improving working efficiency.

[0003] At present, most power plant generators use water-hydrogen-hydrogen cooling, so open flames are strictly prohibited around the generator, and a large shaft grounding carbon brush is set at the steam end of the generator. The generator large shaft grounding carbon brush is used to eliminate the static voltage of the large shaft to the ground. Two sets of large shaft grounding carbon brushes are set, one set is used for rotor single-point grounding protection measurement, and the other set is used for the measurement of rotor shaft current and shaft voltage parameters.

[0004] The existing grounding device for the main shaft of the generator has some shortcomings during use, such as easy sparking during use and low safety. Based on the above problems, we propose a new grounding device for the main shaft of the generator. Utility Model Content

[0005] The purpose of this section is to summarize some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract of the specification and the name of the utility model of this application to avoid blurring the purpose of this section, the abstract of the specification and the name of the utility model, and such simplifications or omissions cannot be used to limit the scope of the utility model.

[0006] In view of the problems existing in the prior art, the present utility model is proposed.

[0007] Therefore, the purpose of the utility model is to provide a grounding device for a main shaft of a generator, which increases the contact area and conductivity during use and can prevent sparking during use.

[0008] In order to solve the above technical problems, according to one aspect of the present invention, the present invention provides the following technical solutions:

[0009] A grounding device for a main shaft of a generator, comprising:

[0010] The mounting assembly includes a mounting plate, a mounting frame arranged on one side of the mounting plate, and mounting screw holes arranged on the mounting frame;

[0011] The adjusting assembly comprises a support plate arranged on one side of the mounting plate, a threaded sleeve arranged on the top of the support plate, a threaded rod arranged in the inner cavity of the threaded sleeve, and a hand wheel arranged on the top of the threaded rod;

[0012] The brush assembly includes a fixed plate arranged at the bottom of the threaded rod, expansion plates arranged at both sides of the fixed plate, a carbon brush body arranged at the bottom of the fixed plate, an expansion carbon brush arranged at the bottom of the expansion plate, a copper braid arranged at the top of the carbon brush body and the expansion carbon brush, a curved frame arranged at one side of the fixed plate, and a grounding copper brush arranged at the bottom of the curved frame.

[0013] As a preferred solution of the grounding device for the main shaft of a generator described in the utility model, wherein: the mounting plate is made of insulating material.

[0014] As a preferred solution of the grounding device for the main shaft of a generator described in the utility model, wherein: a mounting bolt is arranged on the mounting screw hole.

[0015] As a preferred solution of the grounding device for the main shaft of a generator described in the utility model, wherein: a rotating handle is provided on the surface of the hand wheel, and an insulating sleeve is provided on the surface of the rotating handle.

[0016] As a preferred solution of the grounding device for the main shaft of a generator described in the utility model, the top of the fixed plate is connected to the threaded rod through a rotating sleeve.

[0017] As a preferred solution of the grounding device for the main shaft of a generator described in the utility model, wherein: the expansion plate is arranged obliquely.

[0018] As a preferred solution of the grounding device for the main shaft of a generator described in the utility model, the bottom of the carbon brush body and the extended carbon brush are arranged in a curved surface.

[0019] Compared with the prior art, the beneficial effects of the utility model are as follows: by arranging expansion plates on both sides of the fixed plate and arranging expansion carbon brushes at the bottom of the expansion plates, the contact area is increased; by arranging copper braids on the expansion carbon brush and the top of the carbon brush body, the conductivity is increased, which can prevent sparks from occurring during use; in addition, the brush assembly can be conveniently driven up and down by adjusting the assembly, which is convenient for adjusting the height and has high flexibility. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solution of the implementation of the utility model, the utility model will be described in detail below in combination with the drawings and detailed implementation. Obviously, the drawings described below are only some implementations of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0021] Figure 1 It is a schematic diagram of the structure of the utility model;

[0022] Figure 2 This is a side view of the structure of the utility model;

[0023] Figure 3 This is a schematic diagram of the structure of the brush assembly of the utility model.

[0024] In the figure; 100 mounting assembly, 110 mounting plate, 120 mounting frame, 130 mounting screw hole, 200 adjustment assembly, 210 support plate, 220 threaded sleeve, 230 threaded rod, 240 handwheel, 300 brush assembly, 310 fixing plate, 320 extension plate, 330 carbon brush body, 340 extension carbon brush, 350 copper braid, 360 curved frame, 370 grounding copper brush. DETAILED DESCRIPTION

[0025] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below with reference to the accompanying drawings.

[0026] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific implementation methods disclosed below.

[0027] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the implementation of the present invention, for the sake of convenience, the cross-sectional diagram showing the device structure will not be partially enlarged according to the general proportion, and the schematic diagram is only an example, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0028] In order to make the purpose, technical solution and advantages of the present invention more clear, the implementation mode of the present invention will be further described in detail below with reference to the accompanying drawings.

[0029] The utility model provides the following technical solutions: a grounding device for a main shaft of a generator, which increases the contact area and conductivity during use, and can prevent sparking during use;

[0030] Figures 1 to 3 The figure shows a schematic structural diagram of an embodiment of a grounding device for a main shaft of a generator according to the utility model, the main body of which includes a mounting assembly 100 and an adjusting assembly 200;

[0031] The mounting assembly 100 includes a mounting plate 110, a mounting frame 120 mounted on one side of the mounting plate 110, and a mounting screw hole 130 mounted on the mounting frame 120. The mounting plate 110 is made of insulating material, and mounting bolts are installed on the mounting screw hole 130. Further, the mounting plate 110 is used to carry the support plate 210, and the mounting frame 120 and the mounting screw hole 130 are used to fix the mounting plate 110.

[0032] The adjustment assembly 200 includes a support plate 210 installed on one side of the mounting plate 110, a threaded sleeve 220 installed on the top of the support plate 210, a threaded rod 230 installed in the inner cavity of the threaded sleeve 220, and a handwheel 240 installed on the top of the threaded rod 230. A rotating handle is installed on the surface of the handwheel 240, and an insulating sleeve is installed on the surface of the rotating handle. Further, the support plate 210 is used to carry the threaded sleeve 220, the threaded sleeve 220 is used to carry the threaded rod 230, the threaded rod 230 is used to drive the fixing plate 310 to move up and down, and the handwheel 240 is used to facilitate the rotation of the threaded rod 230;

[0033] The brush assembly 300 includes a fixed plate 310 installed at the bottom of the threaded rod 230, an expansion plate 320 installed on both sides of the fixed plate 310, a carbon brush body 330 installed at the bottom of the fixed plate 310, an expansion carbon brush 340 installed at the bottom of the expansion plate 320, a copper braid 350 installed at the top of the carbon brush body 330 and the expansion carbon brush 340, a curved frame 360 ​​installed on one side of the fixed plate 310, and a grounding copper brush 370 installed at the bottom of the curved frame 360. The top of the fixed plate 310 is connected to the threaded rod 230 through a rotating sleeve, the expansion plate 320 is inclined, and the bottom of the carbon brush body 330 and the expansion carbon brush 340 are curved. Furthermore, the fixed plate 310 is used to support the expansion plate 320, the expansion plate 320 is used to support the expansion carbon brush 340, the expansion carbon brush 340 is used to increase the contact area, and the copper braid 350 is used to increase conductivity.

[0034] Combination Figure 1-Figure 3 The grounding device of a main shaft of a generator in this embodiment has the following specific principles: by arranging expansion plates 320 on both sides of a fixed plate 310 and arranging expansion carbon brushes 340 at the bottom of the expansion plates 320, the contact area is increased; by arranging copper braids 350 on the top of the expansion carbon brush 340 and the carbon brush body 330, the conductivity is increased, and sparking can be prevented during use; in addition, the brush assembly 300 can be conveniently driven to move up and down by adjusting the assembly 200, which is convenient for adjusting the height and has high flexibility.

[0035] Although the present invention has been described above with reference to the embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the various features in the embodiments disclosed in the present invention may be used in combination with each other in any manner, and the fact that these combinations are not exhaustively described in this specification is only for the sake of omitting space and saving resources. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A grounding device for a main shaft of a generator, characterized in that: include: A mounting assembly (100) comprises a mounting plate (110), a mounting frame (120) arranged on one side of the mounting plate (110), and mounting screw holes (130) arranged on the mounting frame (120); An adjustment assembly (200) comprises a support plate (210) arranged on one side of a mounting plate (110), a threaded sleeve (220) arranged on the top of the support plate (210), a threaded rod (230) arranged in an inner cavity of the threaded sleeve (220), and a hand wheel (240) arranged on the top of the threaded rod (230); The brush assembly (300) comprises a fixed plate (310) arranged at the bottom of a threaded rod (230), an expansion plate (320) arranged at both sides of the fixed plate (310), a carbon brush body (330) arranged at the bottom of the fixed plate (310), an expansion carbon brush (340) arranged at the bottom of the expansion plate (320), a copper braid (350) arranged at the top of the carbon brush body (330) and the expansion carbon brush (340), a curved frame (360) arranged at one side of the fixed plate (310), and a grounding copper brush (370) arranged at the bottom of the curved frame (360).

2. A grounding device for a main shaft of a generator according to claim 1, characterized in that: The mounting plate (110) is made of insulating material.

3. A grounding device for a main shaft of a generator according to claim 1, characterized in that: The mounting screw hole (130) is provided with a mounting bolt.

4. A grounding device for a main shaft of a generator according to claim 1, characterized in that: The surface of the hand wheel (240) is provided with a rotating handle, and the surface of the rotating handle is provided with an insulating sleeve.

5. The grounding device for a main shaft of a generator according to claim 1, characterized in that: The top of the fixing plate (310) is connected to the threaded rod (230) via a rotating sleeve.

6. A grounding device for a main shaft of a generator according to claim 1, characterized in that: The expansion plate (320) is arranged in an inclined manner.

7. A grounding device for a main shaft of a generator according to claim 1, characterized in that: The bottoms of the carbon brush body (330) and the extended carbon brush (340) are arranged in a curved surface.

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