Gear speed change device of wind turbine generator

Abstract

The utility model provides a wind turbine generator gear speed change device, which relates to the technical field of wind power generation and comprises a gearbox body and a box cover detachably mounted at the top end of the gearbox body, a rotatable power input shaft is mounted on one side of the gearbox body, and a rotatable power output shaft is mounted on the other side of the gearbox body. One end of the power input shaft and one end of the power output shaft extend into the gearbox body; the gearbox body is further provided with a heat dissipation mechanism, and the heat dissipation mechanism comprises a shell fixed to one side of the gearbox body and a plurality of air inlet holes evenly formed in the box cover. Through the arrangement of the heat dissipation mechanism, heat exchange in the gearbox body can be achieved, so that efficient heat dissipation of components in the gearbox body is facilitated, the problem that the performance and the service life of the gear speed change device are affected due to the fact that the interior of the gearbox body is too hot is solved, normal use of the gear speed change device is facilitated, and wind power generation is facilitated.

Description

Technical Field

[0001] This utility model relates to the field of wind power generation technology, and in particular to a gear transmission device for wind turbine units. Background Technology

[0002] In the process of wind power generation, wind turbines are generally needed to drive the turbine blades to rotate using wind power. The blades convert wind energy into kinetic energy and transmit it to the turbine. Since the wind force varies, a speed control device is often needed to adjust the rotation speed of the blades to avoid transmitting excessively fast speeds to the turbine, prevent accelerated wear of the turbine gears, and thus extend the life of the turbine.

[0003] Existing Chinese patents, such as CN 210829610 U, disclose a speed-changing device for wind turbines. This device, by employing a first transmission gear and a second transmission gear with different diameters, changes the rotational speed of the power output shaft. This allows for timely adjustment of the wind turbine's speed based on wind conditions, thereby improving the turbine's efficiency and extending its lifespan. However, in practical use, the gear components inside this speed-changing device often generate significant heat during rotational friction. The lack of a proper heat dissipation structure makes the device prone to overheating, leading to malfunctions and affecting its performance and lifespan, ultimately hindering wind power generation. Utility Model Content

[0004] To address the shortcomings of the existing technology, this utility model proposes a gear transmission device for wind turbine units.

[0005] The technical solution of this utility model is implemented as follows:

[0006] A gear transmission device for a wind turbine includes a gearbox body and a detachable cover mounted on the top of the gearbox body. A rotatable power input shaft is mounted on one side of the gearbox body, and a rotatable power output shaft is mounted on the other side. One end of both the power input shaft and the power output shaft extends into the interior of the gearbox body. The interior of the gearbox body is also provided with a transmission component that connects the power input shaft and the power output shaft.

[0007] The gearbox body is also provided with a heat dissipation mechanism, which includes a housing fixed to one side of the gearbox body and a plurality of air inlets evenly opened on the cover. A cooling fan is installed inside the housing, and an exhaust port is opened on one side of the housing. The gearbox body is also provided with a ventilation hole that connects the interior of the housing with the interior of the gearbox body.

[0008] Preferably, the box cover is further provided with a groove communicating with the air inlet, and a dustproof net is provided in the groove. A first magnetic block is installed at the bottom of the dustproof net. The box cover is provided with a slot for inserting the first magnetic block, and a second magnetic block magnetically connected to the first magnetic block is provided in the slot.

[0009] Preferably, the gearbox body and the cover are provided with corresponding screw holes on both sides, and the gearbox body is screwed with locking bolts through the screw holes on both sides, with one end of the locking bolts screwed into the screw holes on both sides of the cover.

[0010] Preferably, positioning pins are installed on both sides of the bottom of the cover, and positioning grooves are provided on the gearbox body for the positioning pins to be inserted.

[0011] In a further preferred embodiment, an elastic sheet is provided in the positioning groove, and two limiting posts are fixed in the positioning groove. Notches matching the limiting posts are provided on both sides of the elastic sheet.

[0012] More preferably, a limiting block is installed at the top of the elastic sheet, and a limiting groove is provided at the bottom of the positioning pin for the limiting block to be inserted.

[0013] Most preferably, the transmission component includes a first transmission shaft rotatably mounted on one side of the inner wall of the gearbox body, and a fixed seat fixed on the inner wall of the gearbox body. One end of the first transmission shaft is connected to a first coupling sleeve between it and the power input shaft, and a first transmission gear is mounted on the first transmission shaft. A second transmission shaft is rotatably mounted on one side of the fixed seat, and one end of the second transmission shaft is connected to a second coupling sleeve between it and the power output shaft. A second transmission gear that meshes with the first transmission gear is mounted on the second transmission shaft.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. When in use, this utility model can realize heat exchange inside the gearbox body through the setting of the heat dissipation mechanism, thereby facilitating efficient heat dissipation of the internal components of the gearbox body, avoiding overheating inside the gearbox body, which would affect the performance and life of the gear transmission device, and thus benefiting the normal use of the gear transmission device and facilitating wind power generation.

[0016] Furthermore, the dustproof net can block dust and other impurities mixed in with the outside air, preventing them from entering the gearbox body and preventing dust accumulation inside the gearbox body, thereby ensuring the normal operation of the internal components of the gearbox body.

[0017] Furthermore, through the cooperation of the first and second magnetic blocks, the dustproof net can be magnetically fixed to prevent it from falling off, thereby ensuring effective filtration of external air.

[0018] 2. When in use, the elastic sheet of this utility model can automatically spring away from the gearbox cover when disassembling the gearbox body, which facilitates the quick disassembly and assembly of the cover and is beneficial for the maintenance and repair of the transmission components inside the gearbox body. It can further improve the maintenance or repair efficiency of the gear transmission device and ensure the normal use of the gear transmission device.

[0019] Furthermore, by utilizing the limiting block and limiting groove, the positioning pin and the elastic plate can be stably limited, which can prevent the bottom of the positioning pin from loosening with the top of the elastic plate, thereby ensuring that the positioning pin will stably press down and deform the elastic plate, and making it easy for the elastic plate to stably lift the positioning pin. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of this utility model;

[0022] Figure 2 for Figure 1 A sectional view;

[0023] Figure 3 for Figure 2 Enlarged view of point A in the image;

[0024] Figure 4 for Figure 2 Enlarged view of point B in the image;

[0025] Figure 5 This is a schematic diagram of the elastic sheet structure;

[0026] Figure 6 for Figure 3 Enlarged view of point C in the image.

[0027] In the diagram: 1. Gearbox housing; 2. Power input shaft; 3. Power output shaft; 4. Housing; 5. Locking bolt; 6. First drive shaft; 7. First drive gear; 8. Second drive shaft; 9. Second drive gear; 10. Second coupling sleeve; 11. First coupling sleeve; 12. Fixing seat; 13. Air inlet; 14. Dustproof net; 15. Positioning pin; 16. Cooling fan; 17. Ventilation hole; 18. Cover; 19. Elastic sheet; 20. Limiting block; 21. First magnetic block; 22. Second magnetic block; 23. Notch; 24. Limiting post. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] This utility model provides, for example Figures 1-6 The wind turbine gear transmission device shown includes a gearbox body 1 and a detachable cover 18 mounted on the top of the gearbox body 1. A rotatable power input shaft 2 is mounted on one side of the gearbox body 1, and a rotatable power output shaft 3 is mounted on the other side. One end of both the power input shaft 2 and the power output shaft 3 extends into the interior of the gearbox body 1. The interior of the gearbox body 1 is also provided with a transmission component that connects the power input shaft 2 and the power output shaft 3. The transmission component includes a first transmission shaft 6 rotatably mounted on one side of the inner wall of the gearbox body 1 and a fixed seat 12 fixed on the inner wall of the gearbox body 1. One end of the first transmission shaft 6 is connected to the power input shaft 2 by a first coupling sleeve 11, and a first transmission gear 7 is mounted on the first transmission shaft 6. A second transmission shaft 8 is rotatably mounted on one side of the fixed seat 12, and one end of the second transmission shaft 8 is connected to the power output shaft 3 by a second coupling sleeve 10. A second transmission gear 9 that meshes with the first transmission gear 7 is mounted on the second transmission shaft 8.

[0030] The gearbox body 1 is also provided with a heat dissipation mechanism, which includes a housing 4 fixed to one side of the gearbox body 1 and a plurality of air inlets 13 evenly opened on the cover 18. A cooling fan 16 is installed inside the housing 4, and an exhaust port is opened on one side of the housing 4. The gearbox body 1 is also provided with a ventilation hole 17 that connects the interior of the housing 4 with the interior of the gearbox body 1.

[0031] As described above, during use, the gear transmission device is installed as a whole in the nacelle of the wind turbine through the gearbox body 1, and the power input shaft 2 is connected to the hub with blades, and the power output shaft 3 is connected to the wind turbine. When the hub with blades rotates under the action of wind, it will drive the power input shaft 2 to rotate. At this time, the power input shaft 2 drives the first transmission shaft 6 to rotate synchronously through the first coupling sleeve 11. Then, the first transmission shaft 6 drives the second transmission shaft 8 to rotate through the meshing first transmission gear 7 and second transmission gear 9. Then, the second transmission shaft 8 drives the power output shaft 3 to rotate synchronously through the second coupling sleeve 10. Then, the power output shaft 3 drives the wind turbine to operate, so as to realize wind power generation.

[0032] Furthermore, during the operation of the gear transmission device, the air inside the gearbox body 1 can be drawn out through the ventilation hole 17 by the operation of the cooling fan 16 and discharged through the exhaust hole on one side of the outer casing 4. At this time, the inside of the gearbox body 1 is in a negative pressure state, so that external air is drawn into its interior through the air inlet 13. This process is repeated to achieve heat exchange inside the gearbox body 1, thereby facilitating efficient heat dissipation of the internal components of the gearbox body 1 and avoiding overheating inside the gearbox body 1, which would affect the performance and lifespan of the gear transmission device. This is beneficial to the normal use of the gear transmission device and facilitates wind power generation.

[0033] Furthermore, in this embodiment, such as Figure 2 and Figure 4 As shown, the box cover 18 is also provided with a groove that communicates with the air inlet 13, and a dustproof net 14 is provided in the groove. A first magnetic block 21 is installed at the bottom of the dustproof net 14. The box cover 18 is provided with a hole for the first magnetic block 21 to be inserted, and a second magnetic block 22 that is magnetically connected to the first magnetic block 21 is provided in the hole.

[0034] During the process of the heat dissipation mechanism cooling the interior of the gearbox body 1, when external air enters the interior of the gearbox body 1 through the air inlet 13, the external air first passes through the dust filter 14. At this time, the dust filter 14 filters the external air to block dust and other impurities mixed in the external air. The external air then enters the gearbox body 1 through the air inlet 13 after passing through the dust filter 14, so as to facilitate the internal cooling of the gearbox body 1 and prevent dust and other impurities in the air from entering the gearbox body 1, thereby ensuring the normal operation of the internal components of the gearbox body 1.

[0035] Furthermore, through the cooperation of the first magnetic block 21 and the second magnetic block 22, the dustproof net 14 can be magnetically fixed to prevent it from falling off, thereby ensuring effective filtration of external air.

[0036] Meanwhile, in this embodiment, regarding how the aforementioned box cover 18 is disassembled and assembled, as follows: Figures 1-3 As shown, the gearbox body 1 and the cover 18 are provided with corresponding screw holes on both sides, and the gearbox body 1 is screwed with locking bolts 5 through the screw holes on both sides. One end of the locking bolts 5 is screwed into the screw holes on both sides of the cover 18.

[0037] When assembling the cover 18 with the gearbox body 1, first place the cover 18 on top of the gearbox body 1, and then screw the locking bolt 5 into the corresponding screw hole on the cover 18 through the screw hole on the gearbox body 1 to fix the cover 18 and the gearbox body 1. When the cover 18 needs to be disassembled, simply unscrew the locking bolt 5 from the screw hole, and then remove the cover 18 from the gearbox body 1 to achieve quick disassembly of the cover 18, which facilitates the maintenance and repair of the internal components of the gearbox body 1.

[0038] Furthermore, such as Figure 2 and Figure 3 As shown, positioning pins 15 are installed on both sides of the bottom of the cover 18, and positioning grooves are provided on the gearbox body 1 for the positioning pins 15 to be inserted. When the cover 18 is installed on the top of the gearbox body 1, the positioning pins 15 can be inserted into the positioning grooves to quickly position the cover 18 and the gearbox body 1, thereby facilitating the quick installation and removal of the cover 18.

[0039] In addition, in this embodiment, such as Figure 2 , Figure 3 , Figure 5 and Figure 6 As shown, an elastic sheet 19 is also provided in the positioning groove, and two limiting posts 24 are fixed in the positioning groove. Notches 23 matching the limiting posts 24 are opened on both sides of the elastic sheet 19.

[0040] During the disassembly of the cover 18, when the locking bolt 5 is unscrewed from the screw hole, the elastic plate 19, under its own elasticity, pushes the positioning pin 15 upward, causing the positioning pin 15 to rise from the positioning groove and drive the cover 18 to rise from the inside of the gearbox body 1. Then the cover 18 can be removed. This achieves automatic spring-off separation between the cover 18 and the gearbox body 1 during disassembly, which facilitates the quick disassembly and assembly of the cover 18. It is beneficial for the maintenance and repair of the transmission components inside the gearbox body 1, and can further improve the maintenance or repair efficiency of the gear transmission device, ensuring the normal use of the gear transmission device.

[0041] Furthermore, such as Figure 3 and Figure 5 As shown, a limiting block 20 is installed at the top of the elastic sheet 19, and a limiting groove is provided at the bottom of the positioning pin 15 for the limiting block 20 to be inserted. Based on this, when the positioning pin 15 is inserted into the positioning groove, the bottom of the positioning pin 15 abuts against the elastic sheet 19. At this time, the limiting block 20 is inserted into the limiting groove to stably limit the positioning pin 15 and the elastic sheet 19, which can prevent the bottom of the positioning pin 15 from loosening with the top of the elastic sheet 19, thereby ensuring that the positioning pin 15 stably presses down and deforms the elastic sheet 19.

[0042] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A gear transmission device for wind turbine generators, characterized in that: The gearbox includes a gearbox body (1) and a detachable cover (18) mounted on the top of the gearbox body (1). A rotatable power input shaft (2) is mounted on one side of the gearbox body (1) and a rotatable power output shaft (3) is mounted on the other side. One end of the power input shaft (2) and the power output shaft (3) both extend into the interior of the gearbox body (1). The interior of the gearbox body (1) is also provided with a transmission component that connects the power input shaft (2) and the power output shaft (3). The gearbox body (1) is also provided with a heat dissipation mechanism, which includes a housing (4) fixed on one side of the gearbox body (1) and a plurality of air inlets (13) evenly opened on the cover (18). A cooling fan (16) is installed inside the housing (4), and an exhaust hole is opened on one side of the housing (4). The gearbox body (1) is also provided with a ventilation hole (17) that connects the interior of the housing (4) with the interior of the gearbox body (1).

2. The wind turbine gear transmission device according to claim 1, characterized in that: The box cover (18) is also provided with a groove communicating with the air inlet (13), and a dustproof net (14) is provided in the groove. A first magnetic block (21) is installed at the bottom of the dustproof net (14). The box cover (18) is provided with a hole for the first magnetic block (21) to be inserted, and a second magnetic block (22) magnetically connected to the first magnetic block (21) is provided in the hole.

3. The wind turbine gear transmission device according to claim 1, characterized in that: Both sides of the gearbox body (1) and the cover (18) are provided with corresponding screw holes, and the gearbox body (1) is screwed with locking bolts (5) through the screw holes on both sides. One end of the locking bolts (5) is screwed into the screw holes on both sides of the cover (18).

4. The wind turbine gear transmission device according to claim 3, characterized in that: Positioning pins (15) are installed on both sides of the bottom of the cover (18), and positioning grooves for the positioning pins (15) to be inserted are provided on the gearbox body (1).

5. The wind turbine gear transmission device according to claim 4, characterized in that: An elastic sheet (19) is also provided in the positioning groove, and two limiting posts (24) are fixed in the positioning groove. Notches (23) matching the limiting posts (24) are opened on both sides of the elastic sheet (19).

6. The wind turbine gear transmission device according to claim 5, characterized in that: The top of the elastic sheet (19) is fitted with a limiting block (20), and the bottom of the positioning pin (15) is provided with a limiting groove for the limiting block (20) to be inserted.

7. The wind turbine gear transmission device according to claim 1, characterized in that: The transmission component includes a first transmission shaft (6) rotatably mounted on one side of the inner wall of the gearbox body (1) and a fixed seat (12) fixed on the inner wall of the gearbox body (1). One end of the first transmission shaft (6) is connected to the power input shaft (2) by a first coupling sleeve (11), and a first transmission gear (7) is mounted on the first transmission shaft (6). A second transmission shaft (8) is rotatably mounted on one side of the fixed seat (12), and one end of the second transmission shaft (8) is connected to the power output shaft (3) by a second coupling sleeve (10). A second transmission gear (9) that meshes with the first transmission gear (7) is mounted on the second transmission shaft (8).

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