A wind turbine operation and maintenance transmission

Abstract

The application discloses a wind power generator operation and maintenance transmission device, which comprises an input shaft, a main wheel system, a conversion mechanism and a generator, the input shaft is connected to the main wheel system, the main wheel system has two outputs which are respectively connected to the generator, the main wheel system comprises a main inner gear ring, a main planet carrier, a planet wheel and a main sun wheel, input power is transmitted to the planet wheel through the input shaft and the main planet carrier, the planet wheel drives the main sun wheel and the main inner gear ring to rotate and output power, forming a differential structure, the conversion mechanism is arranged outside the main inner gear ring, the conversion mechanism can fix the main inner gear ring, so that the main wheel system is converted from the differential structure into a planetary structure, the input shaft is respectively output to two generators through the differential structure of the main wheel system, when the load of one generator increases, the load of the other generator correspondingly decreases, and the wind power generator has the capability of automatically compensating power; when the wind power decreases, the input power can be concentrated to one generator by converting the differential structure into the planetary structure, so that the efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of wind power transmission, specifically to a transmission device for the operation and maintenance of a wind turbine generator. Background Technology

[0002] In engineering and industrial design, once the size of mechanical equipment exceeds a certain limit, costs no longer decrease according to economies of scale. Instead, costs rise rapidly due to the excessive size of raw materials and the scarcity of large-scale processing and transportation equipment. In existing wind turbine transmission devices, multiple generators are typically connected after the output shaft of the speed-increasing mechanism, or multiple secondary speed-increasing mechanisms are connected after the output shaft of the primary speed-increasing mechanism, and then connected to generators. Due to factors such as manufacturing errors of the generators, it is difficult to evenly distribute the load among multiple generators connected to the same output shaft. As operating time increases, noise and vibration increase, which can easily lead to breakage of transmission gear teeth. Furthermore, due to uneven wear of the generators, replacing one of them will further exacerbate this uneven load distribution. Moreover, when the wind speed is low, the rotational speed of each generator decreases, and efficiency drops. When the output power is less than 25% of the rated power, efficiency is severely reduced. Summary of the Invention

[0003] The purpose of this invention is to provide a transmission device for the operation and maintenance of a wind turbine generator, so as to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a wind turbine operation and maintenance transmission device, comprising an input shaft, a main gear train, a conversion mechanism, an A generator and a B generator, wherein the input shaft is connected to the main gear train, the main gear train has two outputs, which are respectively connected to the A gear train and the B gear train, and the A gear train and the B gear train are respectively connected to the A generator and the B generator;

[0005] The main gear train includes a main internal gear ring, a main planet carrier, planet gears, and a main sun gear. The main planet carrier is fixedly connected to the input shaft. Planet gears are rotatably mounted on the main planet carrier. The planet gears mesh with the main internal gear ring and the main sun gear. The planet gears revolve around the main sun gear while rotating on their own axis. The main sun gear is rotatably mounted on the input shaft. The main internal gear ring is rotatably mounted inside the housing. The input power is transmitted to the planet gears through the input shaft and the main planet carrier. The planet gears drive the main sun gear and the main internal gear ring to rotate and output power, forming a differential structure.

[0006] The main sun gear is connected to gear train A, and the main internal gear ring is connected to gear train B. A conversion mechanism is provided outside the main internal gear ring. The conversion mechanism can fix the main internal gear ring and can convert the main gear train from a differential structure to a planetary structure. The input power is transmitted to the main sun gear output through the input shaft, the main planet carrier, and the planet gears.

[0007] Preferably, the A gear train includes an A internal gear ring, an A planetary carrier, A planetary gears, and an A sun gear. The A planetary carrier is fixedly connected to the main sun gear. A planetary gears are rotatably mounted on the A planetary carrier. The A planetary gears mesh with the A internal gear ring and the A sun gear. The A planetary gears revolve around the A sun gear while rotating on their own axis. The A internal gear ring is rotatably mounted inside the main internal gear ring and is fixedly connected to the main planetary carrier. The input shaft drives the A internal gear ring to rotate through the main planetary carrier, and drives the A planetary carrier to rotate through the main sun gear. The A internal gear ring and the A planetary carrier jointly drive the A planetary gears, which in turn drive the A sun gear to output power. The A sun gear is connected to the A generator.

[0008] Preferably, the B gear train includes a B internal gear ring, a B planetary carrier, planetary gears, and a B sun gear. The B planetary carrier is fixedly connected to the main internal gear ring. The B planetary gears are rotatably mounted on the B planetary carrier. The B planetary gears mesh with the B internal gear ring and the B sun gear. The B planetary gears revolve around the B sun gear while rotating on their own axis. The B sun gear is rotatably mounted inside the housing. The A sun gear passes through the B sun gear. The B internal gear ring is fixed inside the housing. The main internal gear ring drives the B sun gear through the B planetary carrier and the B planetary gears. The B sun gear is connected to the B generator. The housing is fixed inside the engine compartment.

[0009] Preferably, the conversion mechanism includes a toothed disc, an end cap, and a conversion gear. Multiple toothed discs are distributed on the outer cylindrical surface of the main internal gear ring. The toothed discs are rotatably disposed inside the housing. One end face of the end cap is fixed to the outer side of the housing. The conversion gear is sleeved on the end cap. The conversion gear is a double-layer gear with different radii. Its large gear is connected to the motor, and its small gear is connected to the toothed disc.

[0010] The crankset includes a friction disc, a rotating shaft, and a crankset gear. The crankset gear meshes with the pinion of the shift gear. The contact surface between the friction disc and the main internal gear ring is arc-shaped. The friction disc and the crankset gear are fixed at both ends of the rotating shaft. The motor is electrically connected to the controller. The rotation of the motor drives the crankset gear to rotate through the shift gear, and the crankset gear drives the friction disc to rotate. The rotation of the friction disc can clamp the main internal gear ring.

[0011] Preferably, the controller is electrically connected to the wind speed sensor, which is fixed outside the nacelle.

[0012] Compared with the prior art, the beneficial effects of the present invention are: the input shaft outputs to two generators respectively through the differential structure of the main gear train. When the load of one generator increases, the load of the other generator will decrease accordingly, which has the ability to automatically compensate for power. When the wind force decreases, it can switch from the differential structure to the planetary structure to concentrate the input power to one generator and improve efficiency. Attached Figure Description

[0013] Figure 1 This is a cross-sectional view of the housing of the present invention;

[0014] Figure 2 This is an isometric view of the conversion mechanism of the present invention;

[0015] Figure 3 This is an isometric view of the present invention;

[0016] Figure 4 This is another isometric view of the present invention.

[0017] In the diagram: 1. Input shaft, 2. Main gear train, 3. Transformation mechanism, 4. Gear train A, 5. Gear train B, 6. Main internal gear ring, 7. Main planetary carrier, 8. Planetary gears, 9. Main sun gear, 10. Housing, 11. Internal gear ring A, 12. Planetary carrier A, 13. Sun gear A, 14. Internal gear ring B, 15. Planetary carrier B, 16. Sun gear B, 17. Sprocket, 18. End cap, 19. Transformer gear, 20. Friction disc, 21. Shaft, 22. Sprocket gear, 23. Generator A, 24. Electric motor, 25. Generator B, 26. Planetary gear A, 27. Planetary gear B. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. 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 scope of protection of the present invention.

[0019] Please see Figure 1-4 This invention provides a technical solution: a wind turbine generator operation and maintenance transmission device, comprising an input shaft 1, a main gear train 2, a conversion mechanism 3, an A generator 23, and a B generator 25, as shown below. Figure 1 , 4 As shown, input shaft 1 is connected to main gear train 2, which has two outputs, connected to gear train A 4 and gear train B 5 respectively. Gear train A 4 and gear train B 5 are connected to generator A 23 and generator B 25 respectively.

[0020] The main gear train 2 includes a main internal gear ring 6, a main planetary carrier 7, a B planetary gear 27, and a main sun gear 9. The main planetary carrier 7 is fixedly connected to the input shaft 1. Planetary gears 8 are rotatably mounted on the main planetary carrier 7. The planetary gears 8 mesh with the main internal gear ring 6 and the main sun gear 9. The planetary gears 8 revolve around the main sun gear 9 while rotating on their own axis. The main sun gear 9 is rotatably mounted on the input shaft 1. The main internal gear ring 6 is rotatably mounted inside the housing 10. The input power is transmitted to the planetary gears 8 through the input shaft 1 and the main planetary carrier 7. The planetary gears 8 drive the main sun gear 9 and the main internal gear ring 6 to rotate and output power, forming a differential structure.

[0021] The main sun gear 9 is connected to gear train A 4, and the main internal gear ring 6 is connected to gear train B 5. A conversion mechanism 3 is provided outside the main internal gear ring 6. The conversion mechanism 3 can fix the main internal gear ring 6 and can convert the main gear train 2 from a differential structure to a planetary structure. The input power is transmitted to the main sun gear 9 through the input shaft 1, the main planet carrier 7, and the planet gears 8. The input shaft 1 outputs power to two generators 23 through the differential structure of the main gear train 2. When the load on one generator 23 increases, the load on the other will decrease accordingly, which has the ability to automatically compensate for power. When the wind force decreases, it can switch from a differential structure to a planetary structure to concentrate the input power to one generator 23 and improve efficiency.

[0022] To further increase the rotational speed, such as Figure 1 As shown, the A gear train 4 includes an A internal gear ring 11, an A planetary carrier 12, A planetary gears 26, and an A sun gear 13. The A planetary carrier 12 is fixedly connected to the main sun gear 9. The A planetary gears 26 are rotatably mounted on the A planetary carrier 12. The A planetary gears 26 mesh with the A internal gear ring 11 and the A sun gear 13. The A planetary gears 26 revolve around the A sun gear 13 while rotating on their own axis. The A internal gear ring 11 is rotatably mounted inside the main internal gear ring 6. The A internal gear ring 11 is fixedly connected to the main planetary carrier 7. The input shaft 1 drives the A internal gear ring 11 to rotate through the main planetary carrier 7, and drives the A planetary carrier 12 to rotate through the main sun gear 9. The A internal gear ring 11 and the A planetary carrier 12 jointly drive the A planetary gears 26, which in turn drive the A sun gear 13 to output power. The A sun gear 13 is connected to the A generator 24.

[0023] To further increase the rotational speed, such as Figure 1 As shown, the B gear train 5 includes a B internal gear ring 14, a B planetary carrier 15, B planetary gears 27, and a B sun gear 16. The B planetary carrier 15 is fixedly connected to the main internal gear ring 6. The B planetary gears 27 are rotatably mounted on the B planetary carrier 15. The B planetary gears 27 mesh with the B internal gear ring 14 and the B sun gear 16. The B planetary gears 27 revolve around the B sun gear 16 while rotating on their own axis. The B sun gear 16 is rotatably mounted inside the housing 10. The A sun gear 13 passes through the B sun gear 16. The B internal gear ring 14 is fixed inside the housing 10. The main internal gear ring 6 drives the B sun gear 16 through the B planetary carrier 15 and the B planetary gears 27. The B sun gear 16 is connected to the B generator 25. The housing 10 is fixed inside the engine compartment.

[0024] To achieve the conversion between differential structure and planetary structure, such as Figure 1 , Figure 2 The conversion mechanism 3 includes a gear 17, an end cap 18, and a conversion gear 19. Multiple gear 17s are distributed on the outer cylindrical surface of the main internal gear ring 6. The gear 17s are rotatably mounted inside the housing 10. One end face of the end cap 18 is fixed to the outer side of the housing 10. The conversion gear 19 is sleeved on the end cap 18 and is a double-layered gear with different radii, such as... Figure 3As shown, its large gear is connected to the motor 24, and its small gear is connected to the gear 17;

[0025] The chainring 17 includes a friction disc 20, a rotating shaft 21, and a chainring gear 22. The chainring gear 22 meshes with the pinion of the conversion gear 19. The contact surface between the friction disc 20 and the main internal gear ring 6 is arc-shaped. The friction disc 20 and the chainring gear 22 are respectively fixed at both ends of the rotating shaft 21. The motor 24 is electrically connected to the controller. The rotation of the motor 24 drives the chainring gear 22 to rotate through the conversion gear 19. The chainring gear 22 drives the friction disc 20 to rotate. The rotation of the friction disc 20 can clamp the main internal gear ring 6.

[0026] The controller is electrically connected to the wind speed sensor, which is fixed outside the nacelle. When the wind speed is set at a low speed, the controller controls the motor 24 to rotate, which drives the friction disc 20 to clamp the internal gear ring 6, so that the main gear train 2 changes from a differential structure to a planetary structure. The input power is transmitted to the main sun gear 9 through the input shaft 1, the main planet carrier 7, and the planet gears 8, thereby increasing the speed and output power of the generator 23 and improving efficiency.

[0027] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A transmission device for the operation and maintenance of a wind turbine generator, characterized in that: Includes an input shaft (1), a main gear train (2), a conversion mechanism (3), an A generator (24), and a B generator (25). The input shaft (1) is connected to the main gear train (2), which has two outputs connected to the A gear train (4) and the B gear train (5), respectively. The A gear train (4) and the B gear train (5) are connected to the A generator (23) and the B generator (25), respectively. The main gear train (2) includes a main internal gear ring (6), a main planet carrier (7), planet gears (8), and a main sun gear (9). The main planet carrier (7) is fixedly connected to the input shaft (1). Planet gears (8) are rotatably mounted on the main planet carrier (7). The planet gears (8) mesh with the main internal gear ring (6) and the main sun gear (9). The planet gears (8) revolve around the main sun gear (9) while rotating on their own axis. The main sun gear (9) is rotatably mounted on the input shaft (1). The main internal gear ring (6) is rotatably mounted inside the housing (10). The input power is transmitted to the planet gears (8) through the input shaft (1) and the main planet carrier (7). The planet gears (8) drive the main sun gear (9) and the main internal gear ring (6) to rotate and output power, forming a differential structure. The main sun gear (9) is connected to the A gear train (4), the main internal gear ring (6) is connected to the B gear train (5), and a conversion mechanism (3) is provided outside the main internal gear ring (6). The conversion mechanism (3) can fix the main internal gear ring (6). The conversion mechanism (3) can convert the main gear train (2) from a differential structure to a planetary structure. The input power is transmitted to the main sun gear (9) through the input shaft (1), the main planet carrier (7), and the planet gears (8). The conversion mechanism (3) includes a toothed disc (17), an end cap (18), and a conversion gear (19). Multiple toothed discs (17) are distributed on the outer cylindrical surface of the main internal gear ring (6). The toothed discs (17) are rotatably disposed inside the housing (10). One end face of the end cap (18) is fixed to the outer side of the housing (10). The conversion gear (19) is sleeved on the end cap (18). The conversion gear (19) is a double-layer gear with different radii. Its large gear is connected to the motor (24), and its small gear is connected to the toothed disc (17). The crank (17) includes a friction disc (20), a rotating shaft (21), and a crank gear (22). The crank gear (22) meshes with the pinion of the conversion gear (19). The contact surface between the friction disc (20) and the main internal gear ring (6) is arc-shaped. The friction disc (20) and the crank gear (22) are respectively fixed at both ends of the rotating shaft (21). The motor (24) is electrically connected to the controller. The rotation of the motor (24) drives the crank gear (22) to rotate through the conversion gear (19). The crank gear (22) drives the friction disc (20) to rotate. The rotation of the friction disc (20) can clamp the main internal gear ring (6).

2. The wind turbine generator operation and maintenance transmission device according to claim 1, characterized in that: The A gear train (4) includes an A internal gear ring (11), an A planet carrier (12), A planet gears (26), and an A sun gear (13). The A planet carrier (12) is fixedly connected to the main sun gear (9). The A planet gears (26) are rotatably mounted on the A planet carrier (12). The A planet gears (26) mesh with the A internal gear ring (11) and the A sun gear (13). The A planet gears (26) revolve around the A sun gear (13) while rotating on their own axis. The ring (11) is rotated inside the main internal gear ring (6). The internal gear ring (11) is fixedly connected to the main planetary carrier (7). The input shaft (1) drives the internal gear ring (11) to rotate through the main planetary carrier (7), and drives the planetary carrier (12) to rotate through the main sun gear (9). The internal gear ring (11) and the planetary carrier (12) jointly drive the planetary gear (26), which drives the sun gear (13) to output power. The sun gear (13) is connected to the generator (23).

3. The wind turbine generator operation and maintenance transmission device according to claim 2, characterized in that: The B gear train (5) includes a B internal gear ring (14), a B planetary carrier (15), B planetary gears (27), and a B sun gear (16). The B planetary carrier (15) is fixedly connected to the main internal gear ring (6). The B planetary gear (27) is rotatably mounted on the B planetary carrier (15). The B planetary gear (27) meshes with the B internal gear ring (14) and the B sun gear (16). The B planetary gear (27) revolves around the B sun gear (16) while rotating on its own axis. The B sun gear (16) is rotatably mounted inside the housing (10). The A sun gear (13) passes through the B sun gear (16). The B internal gear ring (14) is fixed inside the housing (10). The main internal gear ring (6) drives the B sun gear (16) through the B planetary carrier (15) and the B planetary gears (27). The B sun gear (16) is connected to the B generator (25). The housing (10) is fixed inside the engine room.

4. The wind turbine generator operation and maintenance transmission device according to claim 1, characterized in that: The controller is electrically connected to the wind speed sensor, which is fixed outside the nacelle.

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