Wind turbine generator unit variable pitch slip ring
By introducing a cleaning scraper and vibration mechanism into the pitch slip ring of a wind turbine generator, the problem of impurities adhering to the cleaning strip is solved, achieving a more efficient cleaning effect and slip ring protection.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- DATANG HUNYUAN MIMAZONGLIANG NEW ENERGY CO LTD
- Filing Date
- 2025-02-25
- Publication Date
- 2026-07-10
AI Technical Summary
In the prior art, the cleaning strip easily adheres to impurities when cleaning the slip ring surface, which leads to wear on the slip ring surface insulation layer and affects the cleaning effect.
A variable pitch slip ring for wind turbine generators was designed. By setting up a cleaning scraper and a vibration mechanism, the different elastic coefficients of the springs are used to make the cleaning scraper vibrate up and down, which avoids the adhesion of impurities and improves the cleaning effect.
It effectively prevents impurities from adhering, reduces wear on the slip ring surface, improves cleaning efficiency, prevents corrosion, and ensures the normal operation of the slip ring.
Smart Images
Figure CN224479005U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of slip ring technology, and in particular to a pitch slip ring for wind turbine generator sets. Background Technology
[0002] A pitch slip ring is a rotating contact that connects the rotor and stator of a rotating electric motor, primarily used in wind turbine systems. It is responsible for transmitting the power generated by the rotation of the blades with the wind to the rotor, where it is converted into electrical energy by the generator.
[0003] In the prior art, such as Chinese Patent Publication No. CN220985082U, a wind turbine generator pitch slip ring is disclosed, including a slip ring body. A protective seat is provided at the bottom end of the slip ring body, and a groove is provided between the protective seat and the slip ring body. The groove is annular and surrounds the outer ring of the slip ring body. The outer ring of the slip ring body has multiple sliding grooves. In this patent, the electric push rod can drive the cleaning ring to slide on the outer ring of the slip ring body. At this time, the slider plays a guiding and stabilizing role. When the cleaning ring slides, the cleaning strip of the inner ring of the cleaning ring can scrape off the dust and salt crystals on the outer ring of the slip ring body, preventing salt spray corrosion and sand corrosion of the slip ring body. In addition, the battery powers the heating wire, which heats the outer ring of the slip ring body, so that the dust and salt crystals are heated and better cleaned. It can also prevent the outer ring of the slip ring body from freezing in winter, which would affect the internal working environment.
[0004] In the above technical solution, the cleaning ring and the cleaning strip inside the cleaning ring are driven to move up and down to remove dust and salt crystals from the surface of the slip ring by an electric push rod. However, during the cleaning process, impurities may adhere to the surface of the cleaning strip as it moves vertically in a cycle. This causes the impurities to rub against the surface of the slip ring when it is cleaned repeatedly, affecting the cleaning effect and potentially damaging the insulation layer on the surface of the slip ring.
[0005] Based on this, a pitch slip ring for wind turbine generators is proposed. Utility Model Content
[0006] To address the aforementioned technical problems, this utility model proposes a wind turbine generator pitch slip ring. By using a cleaning scraper ring in conjunction with a vibration mechanism, impurities can be prevented from adhering to the slip ring surface during cleaning, and the vibration mechanism can reduce the adhesion rate of impurities.
[0007] The technical solution to achieve the purpose of this utility model is as follows: a wind turbine generator pitch slip ring, including a slip ring body, a protective seat at the bottom end of the slip ring body, an electric push rod on the upper surface of the protective seat, a cleaning ring at the output end of the electric push rod, a fixed cylinder fixedly connected to the lower surface of the cleaning ring, a spring fixedly connected to the inner top wall of the fixed cylinder, the bottom end of the spring fixedly connected to the output end of the electric push rod, the output end of the electric push rod slidably connected to the inner wall of the fixed cylinder, a fixed rod fixedly connected to the upper surface of the protective seat, a plurality of compression balls fixedly connected to the surface of the fixed rod, a through hole on the upper surface of the cleaning ring, a fixed ring fixedly connected to the inner wall of the through hole, an installation groove on the inner wall of the fixed ring, a fixed plate fixedly connected to the inner wall of the installation groove, a sliding hole on one side of the fixed plate, a sliding rod slidably connected to the inner wall of the sliding hole, a hemisphere and a sliding plate fixedly connected to both ends of the sliding rod respectively, and a spring two sleeved on the surface of the sliding rod.
[0008] In some embodiments, a cleaning scraper ring is fixedly connected to the inner wall of the cleaning ring, the inner wall of the cleaning scraper ring is in contact with the surface of the slip ring body, and a cover plate is fixedly connected to the upper surface of the cleaning ring.
[0009] In some embodiments, a groove is provided between the protective seat and the slip ring body, the groove being annular and surrounding the outer ring of the slip ring body.
[0010] In some embodiments, the surface of the protective base is provided with a groove, the inner wall of the groove is adapted to be slidably connected to a lifting ring, the surface of the lifting ring is fixedly connected to a blocking block, and the surface of the blocking block is slidably connected to the inner wall of the groove.
[0011] In some embodiments, a sliding handle is fixedly connected to one side of the blocking block, a connecting block is fixedly connected to the surface of the protective seat, a spring is fixedly connected to the upper surface of the connecting block, and the top end of the spring is fixedly connected to the lower surface of the sliding handle.
[0012] Compared with existing technologies, the significant advantages of this invention are:
[0013] In this invention, when the electric push rod retracts, the fixing ring is fitted onto the surface of the fixing rod. During the descent of the fixing ring, the hemisphere contacts the extrusion ball. At this time, because the elastic coefficient of spring two is greater than that of spring one, spring one will be stretched first. When it reaches its limit, it continues to descend, and spring two will deform. Through the slide rod, it drives the hemisphere to slide towards the inner wall of the mounting groove, thus allowing the hemisphere to slide past the extrusion ball. After sliding, both spring one and spring two return to their original positions. During the return process, spring one causes the cleaning ring to vibrate up and down, which can prevent impurities from adhering to the cleaning scraper ring, avoid wear on the sliding ring body, and improve the cleaning effect. By setting multiple extrusion balls, the cleaning scraper ring can reciprocate during descent and scraping, further improving the cleaning effect.
[0014] This solves the problem that existing cleaning strips easily adhere to impurities, causing wear on the slip ring surface. Attached Figure Description
[0015] The present invention will be further explained below with reference to the accompanying drawings and embodiments:
[0016] Figure 1 This is a three-dimensional structural schematic diagram provided in one embodiment of the present invention;
[0017] Figure 2 This is a schematic diagram of the vibration mechanism structure provided in one embodiment of the present invention;
[0018] Figure 3 This is a schematic diagram of the cleaning ring section structure provided in one embodiment of the present invention;
[0019] Figure 4 This utility model provides in one embodiment Figure 3 Enlarged structural diagram at point A in the middle;
[0020] Figure 5 This is a schematic diagram of the material discharge mechanism provided in one embodiment of the present invention.
[0021] Explanation of reference numerals in the attached figures:
[0022] 1. Slip ring body; 2. Protective seat; 3. Groove; 4. Electric push rod; 5. Fixed cylinder; 6. Cleaning ring; 7. Cover plate; 8. Cleaning scraper ring; 9. Extrusion ball; 10. Spring 1; 11. Slide groove; 12. Fixed ring; 13. Fixed rod; 14. Mounting groove; 15. Fixed plate; 16. Slide rod; 17. Spring 2; 18. Slide plate; 19. Hemisphere; 20. Lifting ring; 21. Blocking block; 22. Sliding handle; 23. Connecting block; 24. Spring 3. Detailed Implementation
[0023] The present invention will now be described in detail, and the technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present invention.
[0024] This utility model provides an improved pitch slip ring for wind turbine generator sets. The technical solution of this utility model is as follows:
[0025] like Figures 1-4 As shown, a wind turbine generator pitch slip ring includes a slip ring body 1. A protective seat 2 is provided at the bottom end of the slip ring body 1. An electric push rod 4 is provided on the upper surface of the protective seat 2. A cleaning ring 6 is provided at the output end of the electric push rod 4. A fixed cylinder 5 is fixedly connected to the lower surface of the cleaning ring 6. A spring 10 is fixedly connected to the inner top wall of the fixed cylinder 5. Through the fixed cylinder 5 and the spring 10, an elastic connection is achieved between the cleaning ring 6 and the electric push rod 4 without affecting the lifting and lowering of the cleaning ring 6, facilitating the vibration effect on the cleaning ring 6. The bottom end of the spring 10 is fixedly connected to the output end of the electric push rod 4, and the output end of the electric push rod 4 is fixedly connected to the fixed cylinder 5. The inner wall of the protective seat 2 is slidably connected. A fixed rod 13 is fixedly connected to the upper surface of the protective seat 2. Multiple extrusion balls 9 are fixedly connected to the surface of the fixed rod 13. A through hole is opened on the upper surface of the cleaning ring 6. A fixed ring 12 is fixedly connected to the inner wall of the through hole. An installation groove 14 is opened on the inner wall of the fixed ring 12. When the cleaning ring 6 drives the fixed rod 13 to descend, the fixed rod 13 passes through the interior of the fixed ring 12. A fixed plate 15 is fixedly connected to the inner wall of the installation groove 14. A sliding hole is opened on one side of the fixed plate 15. A sliding rod 16 is slidably connected to the inner wall of the sliding hole. A hemisphere 19 and a sliding plate 18 are fixedly connected to both ends of the sliding rod 16 respectively. A spring 17 is sleeved on the surface of the sliding rod 16.
[0026] It should be noted that the slip ring body 1, protective seat 2, cleaning ring 6, and electric push rod 4 in this application are all the same in structure and principle as those in Chinese Patent Publication No. CN220985082U.
[0027] like Figure 2 As shown, in one embodiment, a cleaning scraper ring 8 is fixedly connected to the inner wall of the cleaning ring 6. The cleaning scraper ring 8 can achieve close cleaning with the slip ring body 1, reducing the possibility of impurities adhering to its surface. The inner wall of the cleaning scraper ring 8 is in close contact with the surface of the slip ring body 1, and a cover plate 7 is fixedly connected to the upper surface of the cleaning ring 6.
[0028] like Figure 2 and Figure 4As shown, in one embodiment, a groove 3 is provided between the protective seat 2 and the slip ring body 1. The groove 3 is annular and surrounds the outer ring of the slip ring body 1. The groove 3 can be used as a space to collect scraped impurities.
[0029] The surface of the protective base 2 is provided with a sliding groove 11, and the inner wall of the groove 3 is adapted to slide and connect a lifting ring 20. The surface of the lifting ring 20 is fixedly connected with a blocking block 21, and the surface of the blocking block 21 is slidably connected to the inner wall of the sliding groove 11.
[0030] A sliding handle 22 is fixedly connected to one side of the blocking block 21, a connecting block 23 is fixedly connected to the surface of the protective seat 2, a spring 3 24 is fixedly connected to the upper surface of the connecting block 23, and the top of the spring 3 24 is fixedly connected to the lower surface of the sliding handle 22.
[0031] The specific working method is as follows: The electric push rod 4 activates the cleaning ring 6, which slides on the outer ring of the slip ring body 1. As the cleaning ring 6 slides, the cleaning scraper ring 8 on the inner ring of the cleaning ring 6 scrapes away dust and salt crystals from the outer ring of the slip ring body 1, preventing salt spray corrosion and sand corrosion of the slip ring body 1. When the electric push rod 4 retracts, the fixing ring 12 is fitted onto the surface of the fixing rod 13. During the descent of the fixing ring 12, the hemisphere 19 contacts the compression ball 9. At this time, because the elastic coefficient of spring 17 is greater than that of spring 10, spring 10 will be stretched first. As it continues to descend, spring 17 deforms, causing the hemisphere to move via the slide rod 16. The body 19 slides towards the inner wall of the mounting groove 14, thereby allowing the hemisphere 19 to slide past the extrusion ball 9. After sliding, both spring 10 and spring 2 17 are reset. During the reset process, spring 10 will cause the cleaning ring 6 to drive the cleaning scraper ring 8 to vibrate up and down, which can prevent impurities from adhering to the cleaning scraper ring 8, avoid wear on the slip ring body 1, and improve the cleaning effect. Through the multiple extrusion balls 9, the cleaning scraper ring 8 can be made to vibrate back and forth when it descends to scrape, further improving the cleaning effect. The sliding handle 22 is slidably set on the outer ring of the protective seat 2, and the blocking block 21 is set on the side of the slide groove 11 near the slip ring body 1. The function of the blocking plate is to prevent dust and salt crystals from overflowing from the slide groove 11.
[0032] The technical means disclosed in this utility model are not limited to those described above, but also include technical solutions composed of equivalent substitutions of the above technical features. Matters not covered in this utility model are common knowledge to those skilled in the art.
Claims
1. A pitch slip ring for a wind turbine generator set, comprising a slip ring body (1), characterized in that: The slip ring body (1) has a protective seat (2) at its bottom end. An electric push rod (4) is mounted on the upper surface of the protective seat (2). A cleaning ring (6) is mounted on the output end of the electric push rod (4). A fixed cylinder (5) is fixedly connected to the lower surface of the cleaning ring (6). A spring (10) is fixedly connected to the inner top wall of the fixed cylinder (5). The bottom end of the spring (10) is fixedly connected to the output end of the electric push rod (4). The output end of the electric push rod (4) is slidably connected to the inner wall of the fixed cylinder (5). A fixed rod (13) is fixedly connected to the upper surface of the protective seat (2). Multiple extrusion balls (9) are fixedly connected to the surface of the fixed rod (13). A through hole is opened on the upper surface of the cleaning ring (6). A fixed ring (12) is fixedly connected to the inner wall of the through hole. An installation groove (14) is opened on the inner wall of the fixed ring (12). A fixed plate (15) is fixedly connected to the inner wall of the installation groove (14). A sliding hole is opened on one side of the fixed plate (15). A sliding rod (16) is slidably connected to the inner wall of the sliding hole. A hemisphere (19) and a sliding plate (18) are fixedly connected to the two ends of the sliding rod (16). A spring (17) is sleeved on the surface of the sliding rod (16).
2. The wind turbine generator pitch slip ring according to claim 1, characterized in that: The inner wall of the cleaning ring (6) is fixedly connected to a cleaning scraper ring (8), the inner wall of the cleaning scraper ring (8) is in contact with the surface of the slip ring body (1), and the upper surface of the cleaning ring (6) is fixedly connected to a cover plate (7).
3. The wind turbine generator pitch slip ring according to claim 1, characterized in that: A groove (3) is provided between the protective seat (2) and the slip ring body (1). The groove (3) is annular and surrounds the outer ring of the slip ring body (1).
4. The wind turbine generator pitch slip ring according to claim 3, characterized in that: The surface of the protective seat (2) is provided with a sliding groove (11), and the inner wall of the groove (3) is adapted to slide and connect a lifting ring (20). The surface of the lifting ring (20) is fixedly connected with a blocking block (21), and the surface of the blocking block (21) is slidably connected to the inner wall of the sliding groove (11).
5. A wind turbine generator pitch slip ring according to claim 4, characterized in that: A sliding handle (22) is fixedly connected to one side of the blocking block (21), a connecting block (23) is fixedly connected to the surface of the protective seat (2), a spring three (24) is fixedly connected to the upper surface of the connecting block (23), and the top end of the spring three (24) is fixedly connected to the lower surface of the sliding handle (22).