Collecting ring of wind driven generator

Abstract

The invention relates to the technical field of collecting rings, and discloses a wind driven generator collecting ring which comprises a collecting ring body, a connecting pipe is fixedly connected to the bottom of the collecting ring body, a driving wheel is fixedly connected to the outer wall of the connecting pipe, a dust collecting bin is installed on one side of the collecting ring body, and a rotating shaft is rotationally connected to the bottom of the dust collecting bin. The bottom end of the rotating shaft is fixedly connected with a driven wheel, the driving wheel and the driven wheel are in transmission connection through a transmission belt, the top of the rotating shaft is fixedly connected with a fan, the top of the dust collecting bin is provided with an exhaust pipe, the other end of the exhaust pipe is fixedly connected with a connecting rod, and an air guide cavity is formed in the connecting rod. And one side, close to the collecting ring main body, of the connecting rod is fixedly connected with a plurality of suction nozzles which are vertically arranged at equal intervals. According to the collecting ring of the wind driven generator, through mechanical transmission coupling design, the fan is driven to operate by utilizing equipment rotation energy, and real-time adsorption of carbon powder can be realized without an extra power source.

Description

Technical Field

[0001] The invention relates to the technical field of slip rings, in particular to a slip ring for a wind turbine generator. Background Art

[0002] A slip ring is a key component in a wind turbine, used to transmit power and signals between the rotating part (such as the rotor) and the stationary part (such as the stator or control cabinet). It solves the problem of electrical connection between the rotating and stationary parts, ensuring that the wind turbine can stably and efficiently convert wind energy into electricity and transmit it to the power grid.

[0003] A slip ring typically consists of a conductive ring and brushes. The conductive ring is made of a highly conductive metal material and is used to transmit power and signals. The brushes, which are in contact with the conductive ring, transfer power and signals from the stationary part to the rotating part. The brushes are typically made of carbon or a metal-graphite composite material, offering excellent conductivity and wear resistance. When the wind turbine rotates, the rotor drives the slip ring's conductive ring along with it. The brushes remain stationary and in contact with the conductive ring. This sliding contact between the brushes and the conductive ring allows power and signals to be transferred between the rotating and stationary parts.

[0004] For example, in the prior art, patent authorization publication number CN112583193B discloses a yaw collector ring for a wind turbine generator, comprising a rotor assembly, a stator assembly, a protective housing, a cooling system, and a heating system. Pedals and a stator junction box are provided on the left and right sides of the protective housing, respectively. The stator assembly and rotor assembly are housed within the protective housing. The rotor assembly is connected to the generator via a first conductive bar, and the stator assembly is connected to the transmission cable via a second conductive bar. The rotor assembly is synchronized with the nacelle via a rocker arm, and the stator assembly is fixed to the tower platform. This device utilizes particle wear prevention technology, redundant stator assembly technology, and external circulation or internal temperature control to adjust power consumption under different environments. This achieves 360-degree, uninterrupted power transmission from the wind turbine generator, eliminating the need for downtime and cable unwinding. This improves power generation per unit time and prevents cable oxidation, cracking, and sprains.

[0005] However, the above-mentioned slip ring still has certain defects when used:

[0006] During the use of the above-mentioned collector ring, friction will occur between the carbon brush and the collector ring, causing the carbon brush to wear and produce fine carbon powder. Since the carbon powder cannot be processed and collected in time, the carbon powder remaining on the collector ring and the lubricating grease will form sticky dirt after long-term mixing, resulting in increased roughness of the friction surface and unbalanced distribution of the carbon brush contact pressure, which will in turn trigger arc discharge. The local high temperature generated by the arc will burn the surface plating of the collector ring, forming electro-corrosion pits and aggravating abnormal wear of the carbon brush, eventually forming a vicious cycle of wear-discharge-plating damage. This process not only accelerates the consumption of carbon brushes, but also causes the surface quality of the collector ring to continue to deteriorate, significantly shortening the service life of the equipment and seriously threatening the stability of system operation. Summary of the Invention

[0007] In view of the deficiencies of the prior art, the present invention provides a wind turbine collector ring capable of collecting carbon powder generated during operation.

[0008] The top end of the driving member is connected to the driving member by a chain which has a bottom end connected to the gear train of claim 1, wherein the driving member is connected to the gear train by a chain which has a bottom end connected to the gear train.

[0009] Furthermore, a placement box is installed on the top of the dust collecting bin, a filter block is placed in the placement box, and a plurality of air guide holes are opened on the bottom surface of the placement box.

[0010] Furthermore, a fixing ring is fixedly connected to the middle of the dust collecting bin, a support frame is fixedly connected to the bottom of the fixing ring, a filter cloth is connected to the surface of the support frame, a positioning ring is fixedly connected to the outer edge of the filter cloth, the positioning ring is fitted with the surface of the fixing ring, a magnetic ring is installed in the positioning ring, and the filter cloth is located between the magnetic ring and the fixing ring.

[0011] Furthermore, a plurality of support rods are fixedly connected to the surface of the support frame, two support rings are installed in the fixed ring, the bottom surface of the support ring is fixedly connected to the top of the support rod, two pressure rings are installed in the positioning ring, the positioning ring and the pressure ring are fixedly connected through a connecting frame, the pressure ring and the support ring are positioned correspondingly, and the filter cloth is located between the pressure ring and the support ring.

[0012] Furthermore, a fixed block is fixedly connected to the bottom of the dust collecting bin, and the fixed block is located above the fan. A sliding groove corresponding to the position of the fixed block is opened on the side wall of the dust collecting bin, and a connecting block is slidably connected in the sliding groove. A side of the connecting block close to the fixed block is fixedly connected to multiple metal plates, and a side of the connecting block located outside the dust collecting bin is fixedly connected to a connecting plate. The bottom surface of the mounting frame is fixedly connected to an electrostatic generator, and the electrostatic generator is electrically connected to the metal plate.

[0013] Furthermore, a positioning plate is fixedly connected to a side of the metal plate away from the connecting block, and a positioning block is fixedly connected to a side of the positioning plate close to the fixing block. A positioning groove corresponding to the position of the positioning block is opened on one side of the fixing block.

[0014] Furthermore, an air guide cover is installed on the top of the dust collecting bin, the top of the air guide cover is fixedly connected to the air exhaust pipe, the bottom outer wall of the air guide cover is fixedly connected to a limiting ring, the top outer wall of the dust collecting bin is fixedly connected to an external threaded ring, the outer wall of the air guide cover is slidably connected to a connecting ring, and the connecting ring is threadedly connected to the external threaded ring.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] This type of wind turbine collector ring, through a mechanical transmission coupling design, uses the energy of the equipment's rotation to drive the fan, and can achieve real-time adsorption of carbon powder without an additional power source, preventing carbon powder from remaining on the collector ring and forming sticky oil stains after long-term mixing with lubricating grease, thereby avoiding the risk of electrolytic corrosion caused by carbon powder accumulation, helping to reduce abnormal accumulation of carbon powder between friction pairs, maintaining the smoothness of the contact surface between the carbon brush and the collector ring, inhibiting arc generation, reducing carbon brush wear, and increasing the service life of the collector ring coating. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention;

[0018] Figure 2 It is a schematic diagram of the three-dimensional split structure of the present invention as a whole;

[0019] Figure 3 Schematic diagram of the three-dimensional structure of the connecting rod, nozzle and fixing frame of the present invention;

[0020] Figure 4 Schematic diagram of the three-dimensional structure of the nozzle of the present invention;

[0021] Figure 5 It is a schematic diagram of the three-dimensional cross-sectional structure of the dust collecting bin, filter block, driven wheel and air guide cover of the present invention;

[0022] Figure 6This is a schematic diagram of the three-dimensional disassembled structure of the filter block, placement box, filter cloth and fan of the present invention;

[0023] Figure 7 This is a schematic diagram of the three-dimensional split structure of the pressure ring, support ring, fixing ring and magnetic ring of the present invention;

[0024] Figure 8 This is a schematic diagram of the three-dimensional split structure of the connecting block, metal plate and fixing block of the present invention;

[0025] Figure 9 This is a schematic diagram of the three-dimensional disassembled structure of the air guide cover, dust collection bin and exhaust pipe of the present invention;

[0026] Figure 10 It is a schematic diagram of the three-dimensional structure of the mounting bracket and the electrostatic generator of the present invention.

[0027] In the figure: 1. collector ring body; 2. connecting pipe; 3. driving wheel; 4. dust collecting bin; 5. rotating shaft; 6. driven wheel; 7. transmission belt; 8. fan; 9. exhaust pipe; 10. connecting rod; 11. air guide cavity; 12. suction nozzle; 13. fixing bracket; 14. mounting bracket; 15. exhaust pipe; 16. placement box; 17. filter block; 18. air guide hole; 19. fixing ring; 20. supporting bracket; 21. filter cloth; 22. positioning ring; 23. magnetic ring; 24. supporting rod; 25. supporting ring; 26. pressure ring; 27. connecting bracket; 28. fixing block; 29. ​​slide groove; 30. connecting block; 31. metal plate; 32. connecting plate; 33. electrostatic generator; 34. positioning plate; 35. positioning block; 36. positioning groove; 37. air guide cover; 38. limiting ring; 39. external thread ring; 40. connecting ring. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0029] See also Figures 1 to 10The bottom end of the dust collecting bin 4 is fixedly connected to the dust collecting bin 4, and the bottom end of the dust collecting bin 4 is rotatably connected to the rotating shaft 5. The bottom end of the rotating shaft 5 is fixedly connected to the driven wheel 6. The driving wheel 3 and the driven wheel 6 are connected through a transmission belt 7. The top of the rotating shaft 5 is fixedly connected to the fan 8. The top of the dust collecting bin 4 is installed with an exhaust pipe 9. The other end of the exhaust pipe 9 is fixedly connected to a connecting rod 10. An air guide cavity 11 is opened in the connecting rod 10. A plurality of vertically equidistantly arranged suction nozzles 12 are fixedly connected to the side of the connecting rod 10 near the collector ring body 1. The suction nozzle 12 is connected to the air guide cavity 11. An exhaust pipe 15 is fixedly connected to one side of the bottom of the dust collecting bin 4. A fixing bracket 13 is fixedly connected between the connecting rod 10 and the dust collecting bin 4. The bottom surface of the dust collecting bin 4 is fixedly connected to a mounting bracket 14. A mounting hole is opened on the mounting bracket 14.

[0030] In the wind turbine slip ring of the present invention, when the wind turbine is operating, the slip ring body 1 rotates synchronously with the rotor, driving the driving pulley 3 through the connecting pipe 2, which in turn drives the driven pulley 6 and the rotating shaft 5 via the transmission belt 7, causing the fan 8 fixed to the top of the rotating shaft 5 to rotate at high speed. Fan 8 creates a negative pressure environment within the dust collection bin 4, and through the exhaust pipe 9 and air guide cavity 11, each suction nozzle 12 generates continuous suction. Carbon powder generated during operation is immediately sucked into the suction nozzle 12 and enters the dust collection bin 4 through the air guide cavity 11 and the exhaust pipe 9.

[0031] Through a mechanical transmission coupling design, the fan 8 is driven by the device's rotational energy, achieving real-time carbon powder adsorption without the need for an additional power source. This prevents carbon powder from remaining on the collector ring and mixing with lubricating grease over a long period of time to form sticky oil stains, thereby avoiding the risk of electrolytic corrosion caused by carbon powder accumulation. This helps reduce abnormal accumulation of carbon powder between friction pairs, maintains the smoothness of the contact surface between the carbon brush and the collector ring, inhibits arcing, reduces carbon brush wear, and increases the service life of the collector ring coating. Continuous dust removal can also prevent the degradation of insulation performance and poor heat dissipation caused by dust, reducing equipment failure rates. At the same time, the airflow caused by the fan 8 also helps dissipate heat from the collector ring body 1.

[0032] As a preferred technical solution of the present invention, a placement box 16 is installed on the top of the dust collecting bin 4 , a filter block 17 is placed in the placement box 16 , and a plurality of air guide holes 18 are opened on the bottom surface of the placement box 16 .

[0033] Specifically, the carbon powder-containing air flows into the air guide cavity 11 through the suction nozzle 12 and is transported to the dust collecting bin 4 through the exhaust pipe 9. The porous medium structure of the filter block 17 achieves primary separation of large-particle carbon powder through inertial collision and direct interception effect.

[0034] As a preferred technical solution of the present invention, a fixing ring 19 is fixedly connected to the middle of the dust collecting bin 4, a support frame 20 is fixedly connected to the bottom of the fixing ring 19, a filter cloth 21 is connected to the surface of the support frame 20, a positioning ring 22 is fixedly connected to the outer edge of the filter cloth 21, the positioning ring 22 is in contact with the surface of the fixing ring 19, a magnetic ring 23 is installed in the positioning ring 22, and the filter cloth 21 is located between the magnetic ring 23 and the fixing ring 19.

[0035] Specifically, when the airflow that has undergone preliminary filtration passes through the filter cloth 21, the microporous structure of the filter cloth 21 will deeply filter the fine carbon powder remaining in the airflow to prevent the carbon powder from being discharged to the outside or damaging the fan 8; the magnetic ring 23 can provide preliminary pre-fixation for the positioning ring 22 and the fixing ring 19, thereby bringing convenience to the staff to subsequently use fasteners such as bolts to fix the positioning ring 22, and can facilitate the regular disassembly, cleaning or replacement of the filter cloth.

[0036] As a preferred technical solution of the present invention, a plurality of support rods 24 are fixedly connected to the surface of the support frame 20, two support rings 25 are installed in the fixed ring 19, the bottom surface of the support ring 25 is fixedly connected to the top of the support rod 24, and two pressure rings 26 are installed in the positioning ring 22. The positioning ring 22 and the pressure ring 26 are fixedly connected through the connecting frame 27. The pressure ring 26 corresponds to the position of the support ring 25, and the filter cloth 21 is located between the pressure ring 26 and the support ring 25.

[0037] Specifically, the support ring 25 and the support rod 24 can be used to transform the filter cloth 21 into a wave-shaped stacked layer, thereby increasing the contact area of ​​the filter cloth 21 and improving the filtering efficiency and filtering effect of the filter cloth 21 .

[0038] As a preferred technical solution of the present invention, a fixed block 28 is fixedly connected to the bottom of the dust collecting bin 4, and the fixed block 28 is located above the fan 8. A slide groove 29 corresponding to the position of the fixed block 28 is opened on the side wall of the dust collecting bin 4. A connecting block 30 is slidably connected in the slide groove 29. A side of the connecting block 30 close to the fixed block 28 is fixedly connected to multiple metal plates 31. The side of the connecting block 30 located outside the dust collecting bin 4 is fixedly connected to a connecting plate 32. The bottom surface of the mounting frame 14 is fixedly connected to an electrostatic generator 33, and the electrostatic generator 33 is electrically connected to the metal plate 31.

[0039] Specifically, high-voltage static electricity is applied to the metal plate 31 through the electrostatic generator 33, so that a strong electric field is formed on the surface of the metal plate 31, so that the fine carbon powder in the airflow is polarized and adsorbed under the action of the electric field force. Through this method, the airflow passing through the filter cloth 21 can be further processed with carbon powder, thereby reducing the carbon powder residue in the airflow as much as possible; at the same time, the triple adsorption effect on carbon powder can also be used to disperse the carbon powder everywhere, avoiding the low separation efficiency caused by carbon powder accumulation.

[0040] It is worth noting that the electrostatic generator 33 is a mature product in the prior art and can apply high-voltage static electricity to the metal plate 31 .

[0041] As a preferred technical solution of the present invention, a positioning plate 34 is fixedly connected to the side of the metal plate 31 away from the connecting block 30, and a positioning block 35 is fixedly connected to the side of the positioning plate 34 close to the fixed block 28. A positioning groove 36 corresponding to the position of the positioning block 35 is opened on one side of the fixed block 28.

[0042] Specifically, the positioning block 35 and the positioning groove 36 can position the metal plate 31 to ensure stable operation of the metal plate 31 .

[0043] As a preferred technical solution of the present invention, an air guide cover 37 is installed on the top of the dust collecting bin 4, the top of the air guide cover 37 is fixedly connected to the exhaust pipe 9, the bottom outer wall of the air guide cover 37 is fixedly connected to the limiting ring 38, the top outer wall of the dust collecting bin 4 is fixedly connected to the external threaded ring 39, the outer wall of the air guide cover 37 is slidably connected to the connecting ring 40, and the connecting ring 40 is threadedly connected to the external threaded ring 39.

[0044] Specifically, by unscrewing the connecting ring 40 , the dust collecting bin 4 can be opened, and the filter block 17 and the filter cloth 21 can be regularly disassembled, cleaned or replaced.

[0045] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A wind turbine collector ring, comprising a collector ring body (1), characterized in that: The bottom of the collector ring body (1) is fixedly connected to a connecting pipe (2), the outer wall of the connecting pipe (2) is fixedly connected to a driving wheel (3), a dust collecting bin (4) is installed on one side of the collector ring body (1), the bottom of the dust collecting bin (4) is rotatably connected to a rotating shaft (5), the bottom end of the rotating shaft (5) is fixedly connected to a driven wheel (6), the driving wheel (3) and the driven wheel (6) are connected by a transmission belt (7), the top of the rotating shaft (5) is fixedly connected to a fan (8), the top of the dust collecting bin (4) is installed with an exhaust pipe (9), the other end of the exhaust pipe (9) is fixedly connected to the driven wheel (6), and the driving wheel (3) and the driven wheel (6) are connected by a transmission belt (7). A connecting rod (10) is fixedly connected, an air guide cavity (11) is provided in the connecting rod (10), a side of the connecting rod (10) close to the collector ring body (1) is fixedly connected with a plurality of suction nozzles (12) arranged vertically and equidistantly, the suction nozzles (12) are communicated with the air guide cavity (11), an exhaust pipe (15) is fixedly connected to one side of the bottom of the dust collecting bin (4), a fixing frame (13) is fixedly connected between the connecting rod (10) and the dust collecting bin (4), a mounting frame (14) is fixedly connected to the bottom surface of the dust collecting bin (4), and a mounting hole is provided on the mounting frame (14).

2. A wind turbine collector ring according to claim 1, characterized in that: A placement box (16) is installed on the top of the dust collecting bin (4), a filter block (17) is placed in the placement box (16), and a plurality of air guide holes (18) are opened on the bottom surface of the placement box (16).

3. A wind turbine collector ring according to claim 2, characterized in that: A fixing ring (19) is fixedly connected to the middle of the dust collecting bin (4), a support frame (20) is fixedly connected to the bottom surface of the fixing ring (19), a filter cloth (21) is connected to the surface of the support frame (20), a positioning ring (22) is fixedly connected to the outer edge of the filter cloth (21), the positioning ring (22) is in contact with the surface of the fixing ring (19), a magnetic ring (23) is installed in the positioning ring (22), and the filter cloth (21) is located between the magnetic ring (23) and the fixing ring (19).

4. A wind turbine collector ring according to claim 3, characterized in that: A plurality of support rods (24) are fixedly connected to the surface of the support frame (20); two support rings (25) are installed in the fixed ring (19); the bottom surface of the support ring (25) is fixedly connected to the top of the support rod (24); two pressure rings (26) are installed in the positioning ring (22); the positioning ring (22) and the pressure ring (26) are fixedly connected via a connecting frame (27); the pressure ring (26) and the support ring (25) are positioned correspondingly; and the filter cloth (21) is located between the pressure ring (26) and the support ring (25).

5. A wind turbine collector ring according to claim 4, characterized in that: The bottom of the dust collecting bin (4) is fixedly connected with a fixed block (28), and the fixed block (28) is located above the fan (8). The side wall of the dust collecting bin (4) is provided with a slide groove (29) corresponding to the position of the fixed block (28). A connecting block (30) is slidably connected in the slide groove (29). A side of the connecting block (30) close to the fixed block (28) is fixedly connected with a plurality of metal plates (31). A side of the connecting block (30) located outside the dust collecting bin (4) is fixedly connected with a connecting plate (32). The bottom surface of the mounting frame (14) is fixedly connected with an electrostatic generator (33), and the electrostatic generator (33) is electrically connected to the metal plate (31).

6. A wind turbine collector ring according to claim 5, characterized in that: A positioning plate (34) is fixedly connected to the side of the metal plate (31) away from the connecting block (30), and a positioning block (35) is fixedly connected to the side of the positioning plate (34) close to the fixing block (28). A positioning groove (36) corresponding to the position of the positioning block (35) is provided on one side of the fixing block (28).

7. A wind turbine collector ring according to claim 6, characterized in that: An air guide cover (37) is installed on the top of the dust collecting bin (4), the top of the air guide cover (37) is fixedly connected to the air extraction pipe (9), the bottom outer wall of the air guide cover (37) is fixedly connected to a limiting ring (38), the top outer wall of the dust collecting bin (4) is fixedly connected to an external threaded ring (39), the outer wall of the air guide cover (37) is slidably connected to a connecting ring (40), and the connecting ring (40) is threadedly connected to the external threaded ring (39).

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