A slip ring brush holder for a wind turbine

Abstract

The present invention relates to the technical field of wind turbines, and specifically relates to a slip ring brush holder for a wind turbine, which includes a slip ring shaft cylinder, and further includes: a main slip ring disposed on the outer wall of the slip ring shaft cylinder, where there are multiple main slip rings, and an insulator is disposed between two adjacent main slip rings; a plurality of carbon brushes, the plurality of carbon brushes are disposed on the outer wall of the main slip ring, and two brush heads are adhesively disposed on one side of each of the plurality of carbon brushes close to the slip ring shaft cylinder, a dust extraction head is disposed between the two brush heads, a connecting pipe is sleeved on the top of the dust extraction head, and one end of the connecting pipe is connected to a gas extraction device. Compared with the existing structure, the present invention can generate a revolution with the slip ring shaft cylinder, and the brush heads can produce an active sweeping effect on the main slip ring. At the same time, when the main slip ring is swept by the carbon brushes, the gas extraction device is started to collect dust, avoiding secondary adhesion of dust at the slip ring shaft cylinder, and improving the dust removal effect.

Description

Technical Field

[0001] The present invention relates to the technical field of wind turbines, and specifically to a slip ring brush holder for a wind turbine. Background Art

[0002] Friction between the slip ring and carbon brush of a wind turbine generates dust, and when the dust drops, it adheres to the insulator of the slip ring. Since this dust contains carbon and copper, it can conduct electricity; over time, a layer of conductive dust will form on the insulator, and when the dust accumulates to a certain extent, it will conduct between adjacent phases of the motor, causing accidents.

[0003] In view of the above problems, Chinese Patent with publication number CN201928151U proposes a slip ring brush holder for a wind turbine, which includes a slip ring, a carbon brush, and a brush holder device. The slip ring is composed of an insulator and a main slip ring alternately installed on the slip ring main shaft. The brush holder device is installed on the slip ring chamber of the wind turbine, and the carbon brush is installed in the hole of the brush holder device and contacts the main slip ring; its feature is that the insulator is composed of a wind guiding surface and a balance disk; the wind guiding surface is composed of rings protruding from the outer ring walls on both sides of the balance disk; the wind guiding surface and the balance disk are integrally provided, and an installation hole is provided in the middle of their combination for installation on the slip ring main shaft. The air around the insulator in this utility model will form an air flow, which continuously moves around with the rotation of the insulator, thus preventing the dust generated by the slip ring and carbon brush from approaching the insulator. It only needs to inspect the insulator once every six months and clean the surface of the insulator with a brush, thereby avoiding the problem of phase-to-phase creepage of the motor.

[0004] Based on the above patent and combined with the existing technology, it is found that there are still the following problems:

[0005] Currently, when the brush holder cleans the main slip ring, it can only satisfy the detachment of dust from the main slip ring. However, during the subsequent operation of the generator, the dust will still adhere to the outer wall of the main slip ring again, and the dust cannot be collected and exported centrally, and the dust removal effect needs to be improved. Summary of the Invention

[0006] The purpose of the present invention is to provide a slip ring brush holder for a wind turbine to solve the problems raised in the above background art.

[0007] The technical solution of the present invention is: a slip ring brush holder for a wind turbine, including a slip ring shaft cylinder, and further including:

[0008] A main slip ring provided on the outer wall of the slip ring shaft cylinder, there are multiple main slip rings, and an insulator is provided between two adjacent main slip rings;

[0009] Multiple carbon brushes, multiple of the carbon brushes are arranged on the outer wall of the main slip ring, two brush heads are adhesively arranged on one side of each of the multiple carbon brushes close to the slip ring shaft cylinder, a dust suction head is arranged between the two brush heads, a connecting pipe is sleeved on the top of the dust suction head, and one end of the connecting pipe is connected with a suction device;

[0010] Two support rods and multiple fixing rings, fixing boxes are fixedly installed on the outer walls of one sides of the multiple carbon brushes, torsion springs are fixedly installed on the outer walls of both sides of each fixing box, the other ends of the torsion springs are fixedly connected with the outer walls of one sides of the fixing rings, and the multiple fixing rings are all fixedly installed on the outer walls of the support rods.

[0011] Preferably, one end of the suction device is connected with a dust suction pipe, one end of the dust suction pipe is connected with a first arc-shaped frame, one side outer wall of the first arc-shaped frame and one ends of the two support rods are all sleeved and connected, the support rods and the fixing boxes are both of hollow structures, a through hole is arranged in the middle of the fixing box, the size of the through hole is adapted to that of the support rod, multiple sliders are arranged on the inner wall of the through hole, the fixing box and the support rod are rotationally connected through the sliders, the inner walls of the fixing box and the support rod are communicated through a communication hole opened, and one end of the connecting pipe is communicated with the fixing box.

[0012] Preferably, a second arc-shaped frame is fixedly installed at the other ends of the two support rods.

[0013] Preferably, toothed rings are fixedly installed on the outer walls of the first arc-shaped frame and the second arc-shaped frame, the slip ring brush holder of the wind turbine further includes a driving motor, a gear is fixedly installed at the top end of the output shaft of the driving motor, and the gear meshes with the outer wall of the toothed ring.

[0014] Preferably, the dust suction head is of a concave structure, the bottom surface of the dust suction head is of an open design, and three surfaces of the dust suction head respectively face the insulator and the main slip ring.

[0015] Preferably, a feeding motor is fixedly installed on one side outer wall of the second arc-shaped frame, a feeding rod is fixedly installed at the top end of the output shaft of the feeding motor, the feeding rod is arranged inside the support rod, the first arc-shaped frame is of a hollow structure, and one end of the support rod is communicated with the first arc-shaped frame.

[0016] Preferably, the feeding rod is in a spiral rod shape, bristles are uniformly distributed on the outer wall of the feeding rod, and the bristles are in contact with the inner wall of the support rod.

[0017] Preferably, multiple connecting rods are fixedly installed at one end of the slip ring shaft cylinder, an insulating end cover is fixedly installed at one ends of the multiple connecting rods, and multiple copper terminal posts are fixedly installed on one side outer wall of the insulating end cover.

[0018] The present invention provides a slip ring brush holder for a wind turbine through improvement. Compared with the prior art, the following improvements and advantages are achieved:

[0019] First: Compared with the existing structure, the present invention can generate a revolution with the slip ring shaft cylinder, and the brush head can produce an active sweeping effect on the main slip ring. At the same time, when the main slip ring is swept by the carbon brush, an air extraction device is started to collect dust, avoiding secondary adhesion of dust at the slip ring shaft cylinder, and improving the dust removal effect;

[0020] Second: By starting the drive motor, the drive motor drives the gear to rotate, and then drives the toothed ring to rotate through the meshing of the gear and the toothed ring. The drive motor is a forward and reverse rotation motor. After starting the drive motor, the effect of driving the toothed ring to rotate forward and backward reciprocally is achieved. When rotating forward and backward, the support rod is driven to shake, causing a revolution between the slip ring shaft cylinder and the carbon brush. And when the drive motor continuously adjusts the rotation direction, under the action of the torsion spring and the fixed ring, the carbon brush can generate a certain amplitude of vibration. When the vibration is transmitted to the brush head, the brush head produces an active sweeping effect on the main slip ring, which improves the dust treatment effect at the main slip ring;

[0021] Third: By starting the feeding motor, the feeding motor drives the feeding rod at the top of the output shaft to rotate, realizing the pushing of the dust on the inner wall of the support rod, avoiding the accumulation of dust in the support rod and causing blockage. At the same time, bristles are arranged on the outer wall of the feeding rod to contact the inner wall of the support rod, thereby realizing the scraping of the dust on the inner wall of the support rod, avoiding the situation of dust adhering to the inner wall of the support rod during long-term use;

[0022] Fourth: By starting an external air extraction device, a negative pressure is generated inside the first arc-shaped frame and the support rod. First, the brush head located at the bottom of the carbon brush brushes off the dust attached to the outer wall of the main slip ring. At this time, under the action of the air extraction device, the dust is sucked into the fixed box through the dust extraction head through the connecting pipe, then enters the support rod through the fixed box, and finally the dust gathers in the first arc-shaped frame and is discharged or centrally collected through the dust extraction pipe, realizing the rapid collection of dust at the slip ring shaft cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention will be further explained below with reference to the drawings and embodiments:

[0024] Figure 1 is a three-dimensional view of the present invention;

[0025] Figure 2 is a three-dimensional view of another perspective of the present invention;

[0026] Figure 3 is Figure 2 a partial enlarged view of part A in

[0027] Figure 4It is a structural schematic diagram of the feeding rod part of the present invention;

[0028] Figure 5 It is a three-dimensional diagram of the carbon brush part of the present invention;

[0029] Figure 6 It is another perspective stereogram of the carbon brush part in the present invention.

[0030] Description of reference numerals:

[0031] 1. Slip ring shaft; 2. Main slip ring; 3. Carbon brush; 4. Insulating end cover; 5. Copper terminal; 6. Arc frame 1; 7. Arc frame 2; 8. Support rod; 9. Feeding motor; 10. Gear ring; 11. Feeding rod; 12. Dust extraction pipe; 13. Fixed box; 14. Torsion spring; 15. Brush head; 16. Dust extraction head; 17. Connecting pipe; 18. Slider; 19. Fixed ring. DETAILED DESCRIPTION

[0032] The present invention is described in detail below, and the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] The present invention provides a wind turbine slip ring brush holder through improvement. The technical solution of the present invention is:

[0034] like Figures 1-6 As shown, a wind turbine slip ring brush holder includes a slip ring shaft cylinder 1, which also includes:

[0035] A main slip ring 2 is arranged on the outer wall of the slip ring shaft cylinder 1, and the main slip ring 2 is arranged at multiple locations, and an insulator is arranged between two adjacent main slip rings 2;

[0036] A plurality of carbon brushes 3 are arranged on the outer wall of the main slip ring 2, two brush heads 15 are attached to the side of the plurality of carbon brushes 3 close to the slip ring shaft tube 1, a dust extraction head 16 is arranged between the two brush heads 15, a connecting pipe 17 is sleeved on the top of the dust extraction head 16, and one end of the connecting pipe 17 is connected to an exhaust device;

[0037] Two support rods 8 and multiple fixing rings 19, one side outer wall of multiple carbon brushes 3 is fixedly installed with a fixing box 13, both side outer walls of the fixing box 13 are fixedly installed with a torsion spring 14, the other end of the torsion spring 14 is fixedly connected to one side outer wall of the fixing ring 19, multiple fixing rings 19 are fixedly installed on the outer wall of the support rod 8, and the coordinated setting of the torsion spring 14 and the fixing ring 19 assists the carbon brush 3 to produce the effect of actively shifting the slip ring shaft cylinder 1.

[0038] Further, one end of the air extraction device is connected to a dust extraction pipe 12. One end of the dust extraction pipe 12 is connected to an arc-shaped frame one 6. One side outer wall of the arc-shaped frame one 6 and one ends of two support rods 8 are all sleeved and connected. Both the support rod 8 and the fixed box 13 are hollow structures. A perforation is provided in the middle of the fixed box 13. The size of the perforation is adapted to that of the support rod 8. A plurality of sliders 18 are provided on the inner wall of the perforation. The rotation connection between the fixed box 13 and the support rod 8 is realized through the sliders 18. The inner walls of the fixed box 13 and the support rod 8 are communicated through the opening of communication holes. One end of a connecting pipe 17 is communicated with the fixed box 13. By starting an external air extraction device, negative pressure is generated inside the arc-shaped frame one 6 and the support rod 8. First, the brush head 15 located at the bottom of the carbon brush 3 is set to brush off the dust adhering to the outer wall of the main slip ring 2. At this time, under the action of the air extraction device, the dust enters the fixed box 13 through the dust extraction head 16 and the connecting pipe 17, and then enters the support rod 8 through the fixed box 13. Finally, the dust gathers in the arc-shaped frame one 6 and is discharged or centrally collected through the dust extraction pipe 12, realizing the rapid collection of the dust at the slip ring shaft tube 1.

[0039] Further, the other ends of the two support rods 8 are fixedly installed with an arc-shaped frame two 7. The arc-shaped frame two 7 can be a non-hollow structure.

[0040] Further, tooth rings 10 are fixedly installed on the outer walls of the arc-shaped frame one 6 and the arc-shaped frame two 7. The slip ring brush holder of the wind turbine further includes a driving motor. The top end of the output shaft of the driving motor is fixedly installed with a gear. The gear meshes with the outer wall of the tooth ring 10. The driving motor is started. The gear is driven to rotate by the driving motor, and then the tooth ring 10 is driven to rotate through the meshing of the gear and the tooth ring 10. The driving motor is a forward and reverse rotation motor. After starting the driving motor, the effect of driving the tooth ring 10 to rotate forward and backward reciprocally is realized. When rotating forward and backward, the support rod 8 is driven to shake, causing a revolution between the slip ring shaft tube 1 and the carbon brush 3. And when the driving motor continuously adjusts the rotation direction, under the action of the torsion spring 14 and the fixed ring 19, the carbon brush 3 can generate a certain amplitude of vibration. When the vibration is transmitted to the brush head 15, the brush head 15 generates an active sweeping effect on the main slip ring 2. This setting improves the dust treatment effect at the main slip ring 2.

[0041] Further, the dust extraction head 16 has a concave structure. The bottom surface of the dust extraction head 16 is an open design. The three surfaces of the dust extraction head 16 are respectively aligned with the insulator and the main slip ring 2. Through this structural design, the dust treatment range is improved, avoiding dust and the like from falling to the insulator or other structural positions during dust treatment.

[0042] Further, a feeding motor 9 is fixedly installed on one side outer wall of the arc-shaped frame two 7. The top end of the output shaft of the feeding motor 9 is fixedly installed with a feeding rod 11. The feeding rod 11 is arranged inside the support rod 8. The arc-shaped frame one 6 is a hollow structure. One end of the support rod 8 is communicated with the arc-shaped frame one 6.

[0043] Furthermore, the feeding rod 11 is in the shape of a spiral rod, and the outer wall of the feeding rod 11 is provided with uniformly distributed bristles. The bristles contact the inner wall of the support rod 8. By contacting the inner wall of the support rod 8 with the bristles, the dust on the inner wall of the support rod 8 can be scraped off, avoiding the situation that dust adheres to the inner wall of the support rod 8 during long-term use.

[0044] Furthermore, one end of the slip ring shaft cylinder 1 is fixedly installed with a plurality of connecting rods. One ends of the plurality of connecting rods are fixedly installed with an insulating end cover 4. One side outer wall of the insulating end cover 4 is fixedly installed with a plurality of copper terminal posts 5, and each copper terminal post 5 is provided with a wiring gasket.

[0045] During use, by starting an external air extraction device, a negative pressure is generated inside the arc-shaped frame one 6 and the support rod 8. First, the brush head 15 located at the bottom of the carbon brush 3 brushes off the dust adhering to the outer wall of the main slip ring 2. At this time, under the action of the air extraction device, the dust enters the fixed box 13 through the dust extraction head 16 and the connecting pipe 17, then enters the support rod 8 through the fixed box 13, and finally the dust gathers in the arc-shaped frame one 6 and is discharged or centrally collected through the dust extraction pipe 12, realizing the rapid collection of dust at the slip ring shaft cylinder 1;

[0046] At the same time of dust extraction, the feeding motor 9 can also be started. The feeding rod 11 at the top of the output shaft is driven by the feeding motor 9 to rotate, realizing the pushing of the dust on the inner wall of the support rod 8, avoiding the situation that dust accumulates in the support rod 8 and causes blockage. At the same time, bristles are provided on the outer wall of the feeding rod 11 to contact the inner wall of the support rod 8, thereby realizing the scraping of the dust on the inner wall of the support rod 8 and avoiding the situation that dust adheres to the inner wall of the support rod 8 during long-term use;

[0047] At the same time, the driving motor can also be started. The driving motor drives the gear to rotate, and then drives the gear ring 10 to rotate through the meshing of the gear and the gear ring 10. The driving motor is a forward and reverse rotation motor. After starting the driving motor, the effect of driving the gear ring 10 to rotate forward and backward reciprocally is realized. When rotating forward and backward, the support rod 8 is driven to shake, causing a revolution between the slip ring shaft cylinder 1 and the carbon brush 3. And when the driving motor continuously adjusts the rotation direction, under the action of the torsion spring 14 and the fixed ring 19, the carbon brush 3 can generate a certain amplitude of vibration. When the vibration is transmitted to the brush head 15, the brush head 15 generates an active sweeping effect on the main slip ring 2. This setting improves the dust treatment effect at the main slip ring 2;

[0048] In summary, compared with the existing structure, this device can generate a revolution with the slip ring shaft cylinder 1, and the brush head 15 can generate an active sweeping effect on the main slip ring 2. At the same time, when the main slip ring 2 is swept by the carbon brush 3, the air extraction device is started to collect the dust, avoiding secondary adhesion of the dust at the slip ring shaft cylinder 1, and improving the dust removal effect.

[0049] The foregoing description enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A slip ring brush holder for a wind turbine, comprising a slip ring shaft cylinder (1), characterized in that: It further includes: A main slip ring (2) disposed on the outer wall of the slip ring shaft cylinder (1), with multiple main slip rings (2) provided, and an insulator is provided between two adjacent main slip rings (2); Multiple carbon brushes (3), with multiple carbon brushes (3) disposed on the outer wall of the main slip ring (2). On one side of multiple carbon brushes (3) close to the slip ring shaft cylinder (1), two brush heads (15) are adhesively provided. A dust suction head (16) is provided between the two brush heads (15). A connecting pipe (17) is sleeved on the top of the dust suction head (16), and one end of the connecting pipe (17) is connected to a suction device; Two support rods (8) and multiple fixing rings (19), with fixing boxes (13) fixedly installed on the outer wall of one side of multiple carbon brushes (3). Torsion springs (14) are fixedly installed on the outer walls of both sides of the fixing box (13), and the other ends of the torsion springs (14) are fixedly connected to the outer wall of the fixing ring (19). Multiple fixing rings (19) are all fixedly installed on the outer wall of the support rod (8); One end of the suction device is connected to a dust suction pipe (12), one end of the dust suction pipe (12) is connected to an arc-shaped frame one (6), and one side outer wall of the arc-shaped frame one (6) and one end of the two support rods (8) are all sleeved and connected. The support rod (8) and the fixing box (13) are both of hollow structure. A through hole is provided in the middle of the fixing box (13), and the size of the through hole is adapted to that of the support rod (8). Multiple sliders (18) are provided on the inner wall of the through hole, and the fixing box (13) is rotationally connected to the support rod (8) through the sliders (18). The inner walls of the fixing box (13) and the support rod (8) are communicated by opening communication holes, and one end of the connecting pipe (17) is communicated with the fixing box (13); The other ends of the two support rods (8) are fixedly installed with an arc-shaped frame two (7); Tooth rings (10) are fixedly installed on the outer walls of the arc-shaped frame one (6) and the arc-shaped frame two (7). The slip ring brush holder of the wind turbine further includes a driving motor, and a gear is fixedly installed at the top of the output shaft of the driving motor, and the gear meshes with the outer wall of the tooth ring (10).

2. The slip ring brush holder of a wind turbine according to claim 1, characterized in that: The dust suction head (16) is of concave structure, the bottom surface of the dust suction head (16) is of open design, and three surfaces of the dust suction head (16) respectively face the insulator and the main slip ring (2).

3. The slip ring brush holder of a wind turbine according to claim 1, characterized in that: A feeding motor (9) is fixedly installed on one side outer wall of the arc-shaped frame two (7), a feeding rod (11) is fixedly installed at the top of the output shaft of the feeding motor (9), the feeding rod (11) is disposed inside the support rod (8), the arc-shaped frame one (6) is of hollow structure, and one end of the support rod (8) is communicated with the arc-shaped frame one (6).

4. A slip ring brush holder of a wind turbine according to claim 3, characterized in that: The feeding rod (11) is in the shape of a spiral rod, and uniformly distributed bristles are provided on the outer wall of the feeding rod (11), and the bristles are in contact with the inner wall of the support rod (8).

5. A slip ring brush holder of a wind turbine according to claim 1, characterized in that: One end of the slip ring shaft cylinder (1) is fixedly installed with multiple connecting rods, one ends of the multiple connecting rods are fixedly installed with an insulating end cover (4), and multiple copper terminal posts (5) are fixedly installed on one side outer wall of the insulating end cover (4).

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