Protective structure of gearbox for wind power generation

Abstract

The utility model discloses a protection structure of a gearbox for wind power generation, which relates to the technical field of wind power generation protection appliances and comprises a main body, a limiting groove is arranged in the front end of the main body, an input shaft is rotatably mounted at the center of the front end of the main body, a second mounting box is mounted at the rear end of the main body, and a heat dissipation mechanism is arranged in the second mounting box. A first mounting box is mounted in the middle of the top of the body; under the action of the lightning protection mechanism, thunder and lightning can be conveniently led to the conducting ring through the spline block when being struck by lightning and then led to the ground wire, so that the gear set is prevented from being damaged by the lightning; through cooperation of the fan and the output shaft, rotation of the fan is facilitated, then hot air in the gearbox is pumped out, and the purpose of cooling is achieved; through cooperation of the air cylinder and the valve, the valve can be conveniently opened through the air cylinder, then the oil groove is communicated with the gear box, and remote maintenance of the gear box is achieved; finally, the problems of easy lightning stroke, easy high-temperature fault in summer and inconvenient maintenance are solved.

Description

Technical Field

[0001] This utility model relates to the technical field of wind power generation protective equipment, and in particular to a protective structure for a wind power generation gearbox. Background Technology

[0002] The gearbox in a wind turbine generator set is a crucial mechanical component. Its main function is to transmit the power generated by the wind turbine under wind force to the generator and enable it to achieve the required rotational speed. Typically, the wind turbine's rotational speed is very low, far below the speed required for generator operation. This speed is achieved through the speed-increasing action of the gearbox's gear pairs, hence the name "speed-increasing gearbox." However, because wind turbines are mounted high up and lack lightning rods, they are susceptible to lightning strikes. Furthermore, their location makes maintenance extremely inconvenient for personnel. In addition, the gearbox rotates continuously, and the wind turbine lacks a cooling system, leading to high-temperature failures in summer. Therefore, solutions to these problems are necessary. Utility Model Content

[0003] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a protective structure for a wind power generation gearbox.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a protective structure for a gearbox of a wind power generation system, comprising a main body, a limiting groove formed inside the front end of the main body, an input shaft rotatably mounted at the center of the front end of the main body, a second mounting box mounted at the rear end of the main body, a heat dissipation mechanism provided inside the second mounting box, a first mounting box mounted at the center of the top end of the main body, a maintenance mechanism installed inside the first mounting box, and a transmission system installed inside the main body, an output shaft connected to the rear end of the transmission system, an input shaft connected to the front end of the transmission system, the front end of the input shaft penetrating the main body, and a lightning protection mechanism sleeved on the front end of the input shaft.

[0005] Preferably, the lightning protection mechanism includes a spline block mounted on an input shaft. A spline sleeve is fitted over the front end of the spline block. A spline sleeve is fitted over the front end of the input shaft. Four first mounting slots are provided on the circumferential side of the front end face of the spline sleeve. Limiting plates are inserted into each of the four first mounting slots. The limiting plates are fixed to the front end face of the spline block. A limiting ring is fitted over the spline sleeve. A limiting groove that mates with the limiting ring is provided at the front end of the main body. The limiting ring is rotatably connected to the main body. A conductive ring fitted over the front end of the limiting ring is fitted onto the spline sleeve. The conductive ring is fitted onto the outside of the spline sleeve. A ground wire is installed at the bottom end of the conductive ring.

[0006] Preferably, the limiting plate has a second mounting groove at the adjacent ends, a baffle is provided in the middle of the second mounting groove, springs are installed on both sides of the baffle, a limiting rod is installed on the other end of the spring, the other end of the limiting rod has a beveled surface, and the four first mounting grooves have positioning grooves that cooperate with the limiting rod at the adjacent ends, and the limiting rod is placed in the positioning groove.

[0007] Preferably, the heat dissipation mechanism includes a first bevel gear sleeved on the output shaft, with second bevel gears meshing on both sides of the first bevel gear, a first rotating shaft mounted on the middle of the far side of the second bevel gear, the first rotating shaft being rotatably connected to the second mounting box (14), and a first transmission wheel sleeved on the first rotating shaft, a belt sleeved on the first transmission wheel, a second transmission wheel sleeved on the other end of the belt, a second rotating shaft sleeved inside the second transmission wheel, and a fan fixedly connected to the proximal end of the second rotating shaft.

[0008] Preferably, the other ends of both the first and second rotating shafts are rotatably mounted on the inner wall of the wind turbine.

[0009] Preferably, the maintenance mechanism includes a cylinder installed on the top surface of the first mounting box, a pressure plate is fixedly connected to the telescopic end of the cylinder, a connecting rod is fixedly connected to the bottom surface of the pressure plate, and a valve is fixedly connected to the bottom end of the connecting rod, the valve being conical.

[0010] Preferably, the bottom of the first mounting box is provided with an inverted cone-shaped drainage groove, and an oil outlet is provided through the middle of the drainage groove.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model, through the action of the lightning protection mechanism, facilitates the conduction of lightning to the conductive ring via the spline block when struck by lightning, and then to the ground wire, preventing damage to the gear set; furthermore, through the cooperation of the fan and the output shaft, the fan can rotate, thereby extracting hot air from inside the gearbox and achieving cooling; furthermore, through the cooperation of the cylinder and the valve, the valve can be opened by the cylinder, thereby connecting the oil tank to the gearbox, enabling remote maintenance of the gearbox; ultimately, it solves the problems of susceptibility to lightning strikes, high-temperature failures in summer, and inconvenient maintenance. Attached Figure Description

[0012] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0013] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the device proposed in this utility model;

[0014] Figure 2 This is a schematic cross-sectional view of the device proposed in this utility model;

[0015] Figure 3 This is an exploded view of the lightning protection mechanism proposed in this utility model;

[0016] Figure 4 This is a schematic diagram of the cross-sectional structure of the limiting plate proposed in this utility model;

[0017] Figure 5 This is a schematic diagram of the heat dissipation mechanism proposed in this utility model;

[0018] Figure 6 This is a schematic diagram of the maintenance mechanism proposed in this utility model.

[0019] The components in the diagram are numbered as follows: 1. Main body; 2. First mounting box; 3. Input shaft; 4. Second mounting box; 5. Spline block; 6. Spline sleeve; 7. Limiting ring; 8. Conductive ring; 9. Ground wire; 10. Limiting plate; 11. Spring; 12. Limiting rod; 13. First bevel gear; 14. Second bevel gear; 15. First rotating shaft; 16. First transmission wheel; 17. Belt; 18. Second transmission wheel; 19. Fan; 20. Cylinder; 21. Pressure plate; 22. Drainage groove; 23. Connecting rod; 24. Valve; 25. Oil outlet; 26. Output shaft; 27. Transmission system. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0021] Example: See Figure 1-6This utility model discloses a protective structure for a wind power generation gearbox, comprising a main body 1. A limiting groove is formed inside the front end of the main body 1, facilitating the installation of a limiting ring 7. An input shaft 3 is rotatably mounted at the center of the front end of the main body 1, facilitating the installation of a lightning protection mechanism. The front end of the input shaft 3 penetrates the main body 1. A second mounting box 4 is installed at the rear end of the main body 1, and a heat dissipation mechanism is provided inside the second mounting box 4 to prevent high-temperature malfunctions. A first mounting box 2 is installed at the middle of the top end of the main body 1, and a maintenance mechanism is installed inside the first mounting box 2 to facilitate maintenance by personnel. The device is maintained; and the main body 1 is equipped with a transmission system 27, which facilitates the conversion of the low speed of the input shaft 3 to the high speed of the output shaft 26; the rear end of the transmission system 27 is connected to the output shaft 26, which facilitates the installation of a heat dissipation mechanism; the front end of the transmission system 27 is connected to the rear end of the input shaft 3, and the front end of the input shaft 3 is fitted with a lightning protection mechanism to prevent damage to the device from lightning strikes; the lightning protection mechanism includes a spline block 5 installed on the input shaft 3, which facilitates the installation of a spline sleeve 6; the front end of the spline block 5 is fitted with a spline sleeve 6, which facilitates the installation of a spline sleeve 6. To provide lightning protection in conjunction with the spline block 5; four first mounting slots are provided on the periphery of the front face of the spline sleeve 6, and a limit plate 10 is inserted into each of the four first mounting slots to prevent the spline sleeve 6 from separating from the spline block 5; the limit plate 10 is fixed to the front face of the spline block 5, and a limit ring 7 is fitted over the spline sleeve 6 to allow the spline sleeve 6 to rotate within the device; a limit groove is provided at the front end of the interior of the main body 1 to cooperate with the limit ring 7, and the limit ring 7 is rotatably connected to the main body 1. A conductive ring 8 is provided at the front end of the limit ring 7 to fit onto the spline sleeve 6, and the conductive ring 8 facilitates the conduction of lightning strikes. The ground wire 9 is connected to the grounding wire 9; the conductive ring 8 is sleeved on the outside of the spline sleeve 6, and the ground wire 9 is installed at the bottom of the conductive ring 8, which facilitates the guidance and dispersion of lightning to the ground; the limiting plate 10 has a second mounting groove at the near end, and a baffle is provided in the middle of the second mounting groove. Springs 11 are installed on both sides of the baffle, which facilitates the cooperation of the limiting rod 12; the limiting rod 12 is installed at the other end of the spring 11, which facilitates the locking of the limiting plate 10; the limiting rod 12 has a beveled surface at the other end, and the four first mounting grooves have positioning grooves at the near ends that cooperate with the limiting rod 12, and the limiting rod 12 is placed in the positioning groove.

[0022] In this invention, the heat dissipation mechanism includes a first bevel gear 13 sleeved on the output shaft 26, which facilitates the engagement of a second bevel gear 14. The first bevel gear 13 has two meshing second bevel gears 14 on both sides, which facilitates the rotation of the first rotating shaft 15. The first rotating shaft 15 is mounted on the middle of the distal surface of the second bevel gear 14, which facilitates the engagement of a belt 17 with a first transmission wheel 16. The first rotating shaft 15 is rotatably connected to the second bevel gear 14, and the first transmission wheel 16 is sleeved on the first rotating shaft 15. A belt 17 is sleeved on the first transmission wheel 16, and a second transmission wheel 18 is sleeved on the other end of the belt 17. The second transmission wheel 18 facilitates the simultaneous rotation of the first rotating shaft 15 and the second rotating shaft with the belt 17. A second rotating shaft is sleeved inside the second transmission wheel 18, and the second rotating shaft is connected to the first… Two bevel gears 14 are rotatably connected, and fans 19 are fixedly connected to the near ends of the two second rotating shafts, which facilitates the extraction of high-temperature gas from the gearbox. The other ends of the first rotating shaft 15 and the second rotating shaft are rotatably mounted on the inner wall of the wind turbine. The maintenance mechanism includes a cylinder 20 installed on the top surface of the first mounting box 2, which facilitates the descent of the pressure plate 21. The extension end of the cylinder 20 is fixedly connected to the pressure plate 21, which drives the valve 24 to open. A connecting rod 23 is fixedly connected to the bottom surface of the pressure plate 21, and a valve 24 is fixedly connected to the bottom end of the connecting rod 23, which facilitates oil discharge. The valve 24 is conical, and an inverted conical drainage groove 22 is provided at the bottom end of the first mounting box 2, which facilitates the movement of oil to the oil outlet 25. An oil outlet 25 is provided through the middle of the drainage groove 22, which facilitates the addition of lubricating oil to the gears.

[0023] Working principle: In the use of this utility model, the lightning protection mechanism is first installed on the input shaft 3 through the spline block 5 and spline sleeve 6. After the spline block 5 is inserted into the spline sleeve 6 to the designated position, it is limited by the limiting plate 10. The limiting ring 7 will rotate freely in the limiting groove of the main body 1, reducing the friction between the input shaft 3 and the main body 1 and extending its service life. The speed of the input shaft 3 is too low to reach the power generation standard. Therefore, the speed of the input shaft 3 is adjusted by the transmission system 27. After reaching the standard, the output shaft 26 rotates to generate electricity. The first bevel gear 13 is sleeved on the output shaft 26. Through the meshing transmission of the first bevel gear 13 and the second bevel gear 14, the first rotating shaft 15 is driven to rotate, and then through the first rotating shaft... 15. The cooperation of the first transmission wheel 16 and the second transmission wheel 18 causes the first rotating shaft 15 and the second rotating shaft to rotate simultaneously, thereby driving the fan 19 to extract the hot air from the gearbox to achieve the purpose of cooling. When the device is struck by lightning, the spline sleeve 6 will conduct the lightning to the conductive ring 8, and then guide the lightning to the ground wire 9 for lightning protection. When the gearbox needs maintenance, simply operate the cylinder 20 remotely. The cylinder 20 drives the pressure plate 21 downward, which pressurizes the inside of the first mounting box 2 on the one hand, and opens the valve 24 with the connecting rod 23 on the other hand, so that the lubricating oil drips onto the gears to maintain the gears. After maintenance, operate the cylinder 20 to drive the pressure plate 21 upward to close the valve 24.

[0024] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A protective structure for a gearbox in a wind power generation system, comprising a main body (1), characterized in that: The main body (1) is equipped with a second mounting box (4) at its rear end. The second mounting box (4) is equipped with a heat dissipation mechanism. The main body (1) is equipped with a first mounting box (2) at its top center. The first mounting box (2) is equipped with a maintenance mechanism. The main body (1) is equipped with a transmission system (27). The transmission system (27) is connected to an output shaft (26) at its rear end. The transmission system (27) is connected to an input shaft (3) at its front end. The input shaft (3) passes through the main body (1) at its front end. The input shaft (3) is fitted with a lightning protection mechanism at its front end.

2. The protective structure for a wind power generation gearbox according to claim 1, characterized in that: The lightning protection mechanism includes a spline block (5) mounted on an input shaft (3). A spline sleeve (6) is fitted over the front end of the input shaft (3). Four first mounting slots are provided on the periphery of the front end face of the spline sleeve (6). Limiting plates (10) are inserted into each of the four first mounting slots. The limiting plates (10) are fixed to the front end face of the spline block (5). A limiting ring (7) is fitted over the spline sleeve (6). A limiting groove that cooperates with the limiting ring (7) is provided at the front end of the main body (1). The limiting ring (7) is rotatably connected to the main body (1). A conductive ring (8) is provided at the front end of the limiting ring (7). The conductive ring (8) is fitted over the outside of the spline sleeve (6). A ground wire (9) is installed at the bottom end of the conductive ring (8).

3. The protective structure for a wind power generation gearbox according to claim 2, characterized in that: The four limiting plates (10) have a second mounting groove at their close ends. A baffle is provided in the middle of the second mounting groove. A spring (11) is installed on both sides of the baffle. A limiting rod (12) is installed at the other end of the spring (11). A chamfer is provided at the other end of the limiting rod (12). A positioning groove for the limiting rod (12) is provided at the close ends of the four first mounting grooves. The limiting rod (12) is placed in the positioning groove.

4. The protective structure for a wind power generation gearbox according to claim 1, characterized in that: The heat dissipation mechanism includes a first bevel gear (13) sleeved on the output shaft (26), and two second bevel gears (14) meshing and driving on both sides of the first bevel gear (13). A first rotating shaft (15) is installed at the middle of the far side of the two second bevel gears (14). The first rotating shaft (15) is rotatably connected to the second bevel gears (14), and a first transmission wheel (16) is sleeved on the first rotating shaft (15). A belt (17) is sleeved on the first transmission wheel (16), and a second transmission wheel (18) is sleeved on the other end of the belt (17). A second rotating shaft is sleeved inside the second transmission wheel (18), and the second rotating shaft is rotatably connected to the second bevel gears (14). A fan (19) is fixedly connected to the near end of the two second rotating shafts.

5. The protective structure for a wind power generation gearbox according to claim 1, characterized in that: The maintenance mechanism includes a cylinder (20) installed on the top surface of the first mounting box (2). A pressure plate (21) is fixedly connected to the telescopic end of the cylinder (20). A connecting rod (23) is fixedly connected to the bottom surface of the pressure plate (21). A valve (24) is fixedly connected to the bottom end of the connecting rod (23). The valve (24) is conical.

6. The protective structure for a wind power generation gearbox according to claim 1, characterized in that: The bottom of the first mounting box (2) is provided with an inverted cone-shaped drainage groove (22), and an oil outlet (25) is provided through the middle of the drainage groove (22).

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