Mounting bracket for additionally arranging grounding carbon brush on wind driven generator

Abstract

The utility model belongs to the technical field of wind driven generators, and particularly relates to a wind driven generator mounting bracket additionally provided with a grounding carbon brush, which comprises two right-angle brackets, a fixed cross beam is arranged at one ends of the two right-angle brackets, a brush holder fixing seat is arranged on one side of the fixed cross beam, the grounding carbon brush is arranged at one end of the brush holder fixing seat, and the grounding carbon brush is arranged at the other end of the brush holder fixing seat. And a mounting hole is formed in the end part of the right-angle bracket. A bolt penetrates through a through hole in one end of a right-angle support to fix the right-angle support on a bolt hole of a generator end cover, a fixing bolt penetrates through oval holes in the two ends of a fixing cross beam to enable a fixing nail to be connected with screw holes in one ends of the two right-angle supports, and one end of a brush holder fixing seat is connected with a threaded hole in the middle of the fixing cross beam. The grounding stainless steel ring is installed on the generator front-end rotating shaft, the whole position is adjusted to enable the brush holder fixing seat to be parallel to the central axis of the generator front-end rotating shaft, the whole set of support installation is completed, and therefore the problem that the auxiliary grounding carbon brush cannot be reliably installed on an original generator is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of wind generators, and in particular relates to a mounting bracket for adding a grounding carbon brush to a wind generator. Background Art

[0002] Doubly-fed wind turbines have shaft currents due to magnetic field asymmetry, unbalanced magnetic resistance, excitation current harmonics, etc. The control of shaft current is related to the healthy operation of the generator. The mainstream control method is to guide the shaft current. The common practice is to assemble a grounding loop at the generator slip ring and ground the shaft current through a grounding carbon brush.

[0003] At present, after long-term use, the shaft current problem of existing wind turbines will become more and more prominent as the operating years increase. The original grounding slip ring may be worn, and the ability to conduct shaft current will gradually weaken. Replacing the entire slip ring is not economical, and auxiliary grounding is the best choice. However, the generator is not designed specifically when it leaves the factory, and the carbon brush for auxiliary grounding cannot be installed, so the carbon brush installation cannot be achieved. Utility Model Content

[0004] The utility model aims to provide a mounting bracket for adding grounding carbon brushes to a wind turbine, aiming to solve the problem in the prior art that after a long period of use, as the operating years of the existing wind turbine increase, the generator shaft current problem becomes more and more prominent, and the original grounding slip ring may be worn, and the ability to conduct the shaft current gradually weakens. Replacing the entire slip ring is not economical, and auxiliary grounding is the best choice. However, the generator is not designed specifically when it leaves the factory, and the auxiliary grounding carbon brush cannot be installed, thereby failing to realize the problem of carbon brush installation.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a mounting bracket for adding a grounding carbon brush to a wind turbine, comprising two right-angle brackets, one end of the two right-angle brackets is provided with a fixed crossbeam, one side of the fixed crossbeam is provided with a brush holder fixing seat, one end of the brush holder fixing seat is provided with a grounding carbon brush, and the end of the right-angle bracket is provided with a mounting hole;

[0006] An elliptical hole is respectively provided at both ends of the fixed beam, a fixing bolt is provided inside the elliptical hole, a threaded hole is provided on the surface of the fixed beam, a grounding stainless steel ring is provided at the bottom of the grounding carbon brush, a generator end cover is provided on one side of the fixed beam, and a generator front end shaft is provided at one end of the generator end cover.

[0007] As a preferred mounting bracket for adding a grounding carbon brush to a wind turbine according to the utility model, an outer wall at one end of the brush holder fixing seat is provided with an external thread, and the external thread at one end of the brush holder fixing seat is matched with the threaded hole.

[0008] As a preferred mounting bracket for adding a grounding carbon brush to a wind turbine according to the utility model, the outer layer of the brush holder fixing seat is a glass fiber reinforced plastic insulation layer.

[0009] As a preferred mounting bracket for adding a grounding carbon brush to a wind turbine of the utility model, a screw hole is provided at one end of the right-angle bracket, and the fixed crossbeam can form a threaded connection structure with the right-angle bracket through an elliptical hole, a fixing bolt and a screw hole.

[0010] As a preferred mounting bracket for adding grounding carbon brushes to a wind turbine according to the utility model, the grounding stainless steel ring is a split half ring.

[0011] As a preferred mounting bracket for adding a grounding carbon brush to a wind turbine according to the utility model, the grounding stainless steel ring is sleeve-mounted on the outer wall of the rotating shaft at the front end of the turbine.

[0012] As a preferred mounting bracket for adding a grounding carbon brush to a wind turbine according to the utility model, one end of the right-angle bracket is in contact with the outer wall of the generator end cover.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1. Fix the right-angle bracket to the bolt hole of the generator end cover by passing the bolt through the through hole at one end of the right-angle bracket, and use the fixing bolt to pass through the elliptical holes at both ends of the fixed beam to fix it to the screw holes at one end of the two right-angle brackets, connect one end of the brush holder fixing seat with the threaded hole in the middle of the fixed beam, install the grounding stainless steel ring on the front shaft of the generator, adjust the overall position so that the brush holder fixing seat is parallel to the central axis of the front shaft of the generator to complete the installation of the whole set of brackets, and finally install the grounding carbon brush on the bracket, thus solving the difficulty that the original generator cannot reliably install the auxiliary grounding carbon brush;

[0015] 2. The grounding carbon brush can be installed in the above way, which can easily realize the function without affecting the inherent structure of the generator, with low implementation difficulty, simple installation and stable and reliable fixing method;

[0016] 3. Installing the grounding carbon brush in the above way can improve the operating reliability and safety of the generator, so that the enterprise can obtain direct positive benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0018] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the main disassembly structure of the utility model;

[0020] Figure 3 It is a schematic diagram of the explosion structure of the utility model.

[0021] In the figure: 1. Right-angle bracket; 2. Fixed beam; 3. Brush holder fixing seat; 4. Grounding carbon brush; 5. Mounting hole; 6. Elliptical hole; 7. Fixing bolt; 8. Threaded hole; 9. Grounding stainless steel ring; 10. Generator end cover; 11. Generator front end shaft. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figure 1-Figure 3 The utility model provides the following technical solutions: a mounting bracket for adding a grounding carbon brush to a wind turbine, comprising two right-angle brackets 1, one end of the two right-angle brackets 1 is provided with a fixed crossbeam 2, one side of the fixed crossbeam 2 is provided with a brush holder fixing seat 3, one end of the brush holder fixing seat 3 is provided with a grounding carbon brush 4, and the end of the right-angle bracket 1 is provided with a mounting hole 5;

[0024] An elliptical hole 6 is respectively provided at both ends of the fixed crossbeam 2, a fixing bolt 7 is provided inside the elliptical hole 6, a threaded hole 8 is provided on the surface of the fixed crossbeam 2, a grounding stainless steel ring 9 is provided at the bottom of the grounding carbon brush 4, a generator end cover 10 is provided on one side of the fixed crossbeam 2, and a generator front end shaft 11 is provided at one end of the generator end cover 10;

[0025] It should be noted that a through hole is provided at one end of the right-angle bracket 1 and a threaded screw hole is provided at the other end. The grounding carbon brush 4 is a prior art and therefore will not be described in detail.

[0026] Preferably: an outer wall at one end of the brush holder fixing seat 3 is provided with an external thread, and the external thread at one end of the brush holder fixing seat 3 is adapted to the threaded hole 8, the outer layer of the brush holder fixing seat 3 is a glass fiber reinforced plastic insulation layer, a screw hole is provided at one end of the right angle bracket 1, and the fixed crossbeam 2 can form a threaded connection structure with the right angle bracket 1 through the elliptical hole 6, the fixing bolt 7 and the screw hole, the grounding stainless steel ring 9 is a split half ring, the grounding stainless steel ring 9 is sleeved and installed on the outer wall of the front end shaft 11 of the generator, and one end of the right angle bracket 1 is in contact with the outer wall of the generator end cover 10;

[0027] It should be noted that the bolts for threaded connection between the right-angle bracket 1 and the generator end cover 10 are M12*50 bolts, and the fixing bolts 7 are M12*40 bolts.

[0028] During specific use, bolts are passed through the through holes at one end of the right-angle bracket 1 to fix it on the bolt holes of the generator end cover 10 to complete the installation of a total of two right-angle brackets 1, and fixing bolts 7 are used to pass through the elliptical holes 6 at both ends of the fixed beam 2 to fix them to the screw holes at one end of the two right-angle brackets 1, and one end of the brush holder fixing seat 3 is connected to the middle threaded hole 8 of the fixed beam 2, and the grounding stainless steel ring 9 is installed on the front end shaft 11 of the generator. The overall position is adjusted so that the brush holder fixing seat 3 is parallel to the central axis of the front end shaft 11 of the generator to complete the installation of the entire set of brackets, and finally the grounding carbon brush 4 is installed on the bracket.

[0029] Working principle: When using the wind turbine to add a mounting bracket for grounding carbon brushes, bolts are passed through the through hole at one end of the right-angle bracket 1 to fix it to the bolt hole of the generator end cover 10 to complete the installation of a total of 2 right-angle brackets 1. Use fixing bolts 7 to pass through the elliptical holes 6 at both ends of the fixed beam 2 to fix it to connect the screw holes at one end of the two right-angle brackets 1, connect one end of the brush holder fixing seat 3 to the middle threaded hole 8 of the fixed beam 2, install the grounding stainless steel ring 9 on the front end shaft 11 of the generator, and adjust the overall position so that the brush holder fixing seat 3 is in the middle of the front end shaft 11 of the generator. When the axis lines are parallel, the installation of the entire bracket is completed, and finally the grounding carbon brush 4 can be installed on the bracket. This solves the difficulty that the original generator cannot reliably install the auxiliary grounding carbon brush 4. The grounding carbon brush 4 is installed in the above manner, and the function can be easily realized without affecting the inherent structure of the generator. The implementation difficulty is small, the installation is simple, and the fixing method is stable and reliable. In addition, the installation of the grounding carbon brush 4 in the above manner can improve the operating reliability and safety of the generator, so that the enterprise can obtain direct positive benefits.

[0030] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions described in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A mounting bracket for adding a grounding carbon brush to a wind turbine, comprising two right-angle brackets (1), characterized in that: A fixed crossbeam (2) is provided at one end of the two right-angle brackets (1), a brush holder fixing seat (3) is provided on one side of the fixed crossbeam (2), a grounding carbon brush (4) is provided at one end of the brush holder fixing seat (3), and a mounting hole (5) is provided at the end of the right-angle bracket (1); An elliptical hole (6) is respectively provided at both ends of the fixed crossbeam (2), a fixing bolt (7) is provided inside the elliptical hole (6), a threaded hole (8) is provided on the surface of the fixed crossbeam (2), a grounding stainless steel ring (9) is provided at the bottom of the grounding carbon brush (4), a generator end cover (10) is provided on one side of the fixed crossbeam (2), and a generator front end shaft (11) is provided at one end of the generator end cover (10).

2. The mounting bracket for adding a grounding carbon brush to a wind turbine according to claim 1, characterized in that: An outer wall at one end of the brush holder fixing seat (3) is provided with an external thread, and the external thread at one end of the brush holder fixing seat (3) is adapted to the threaded hole (8).

3. The mounting bracket for adding a grounding carbon brush to a wind turbine according to claim 1, characterized in that: The outer layer of the brush holder fixing seat (3) is a glass fiber reinforced plastic insulation layer.

4. The mounting bracket for adding a grounding carbon brush to a wind turbine according to claim 1, characterized in that: A screw hole is provided at one end of the right-angle bracket (1), and the fixed crossbeam (2) can form a threaded connection structure with the right-angle bracket (1) through the elliptical hole (6), the fixing bolt (7) and the screw hole.

5. The mounting bracket for adding a grounding carbon brush to a wind turbine according to claim 1, characterized in that: The grounding stainless steel ring (9) is a split half ring.

6. The mounting bracket for adding a grounding carbon brush to a wind turbine according to claim 1, characterized in that: The grounding stainless steel ring (9) is sleeve-mounted on the outer wall of the front end rotating shaft (11) of the generator.

7. The mounting bracket for adding a grounding carbon brush to a wind turbine according to claim 1, characterized in that: One end of the right-angle bracket (1) fits against the outer wall of the generator end cover (10).

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