Integrated vertical axis fan transmission chain structure and wind generating set

Abstract

The integrated vertical shaft fan transmission chain structure comprises a speed increaser component, the power input end of the speed increaser component is detachably connected with a wind wheel, the speed increaser component and the wind wheel are coaxially arranged, the power output end of the speed increaser component is connected with a power input shaft of a generator component, and the power output end of the generator component is connected with a power output shaft of the generator component. The speed increaser component is fixedly installed on the tower drum and located outside the tower drum, and the generator component is located in the tower drum. The speed increaser component comprises a planetary gear train assembly and an output shaft assembly, and the planetary gear train assembly and the output shaft assembly are detachably connected. The device can improve the compactness, reliability and stability of the transmission chain of the wind generating set, and reduce the operation and maintenance and production and manufacturing cost.

Description

An integrated vertical axis wind turbine drive chain structure and wind turbine generator set Technical Field

[0001] This invention relates to the field of wind power generation technology, and in particular to an integrated vertical axis wind turbine drive chain structure and a wind turbine generator set. Background Technology

[0002] Wind energy, as a clean and renewable energy source, is a key force driving the global green energy transition. Utilizing wind turbines to convert wind energy into electricity has become one of the core technological means for this global energy transition. Wind turbines are mainly divided into horizontal axis wind turbines and vertical axis wind turbines. Compared to horizontal axis wind turbines, vertical axis wind turbines have advantages such as lower noise and smaller footprint, making them particularly advantageous in specific application scenarios such as urban areas.

[0003] In existing technologies, the transmission system structures for vertical axis wind turbines mainly include: direct-drive generator direct connection and semi-direct-drive bearing housing + speed increaser + generator. For the direct-drive structure, as the size of the vertical axis wind turbine increases, the generator manufacturing cost is high, resulting in poor economic efficiency. For the bearing housing + speed increaser + generator structure, the generator cost can be reduced, but the bearing housing and speed increaser components are added, resulting in low integration of the transmission chain. The speed increaser is installed inside the tower, which leads to difficulties in installation and maintenance, as well as low transmission efficiency. Summary of the Invention

[0004] The purpose of this invention is to solve the problems existing in the prior art and provide an integrated vertical axis wind turbine drive chain structure and wind turbine generator set. This device can improve the compactness, reliability and stability of the wind turbine generator set drive chain, and reduce operation and maintenance and manufacturing costs.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: an integrated vertical axis wind turbine transmission chain structure, including a speed increaser component, wherein the speed increaser component is lubricated by an oil bath, the power input end of the speed increaser component is detachably connected to the wind turbine, the speed increaser component is coaxially arranged with the wind turbine, the power output end of the speed increaser component is connected to the power input shaft of a generator component, the speed increaser component is fixedly installed on the tower and located outside the tower, and the generator component is located inside the tower; the speed increaser component includes a planetary gear train assembly and an output shaft assembly, the planetary gear train assembly and the output shaft assembly being detachably connected.

[0006] As a preferred embodiment, the planetary gear train assembly includes an upper housing and planetary gear components disposed within the upper housing; the output shaft assembly includes a lower housing and a central output shaft disposed within the lower housing; the upper housing and the lower housing are detachably connected; the planetary gear components include a planet carrier and a sun gear; the power input end of the planet carrier is detachably connected to the wind turbine; and the first end of the sun gear is mounted in the planet carrier via a self-aligning roller bearing.

[0007] As a preferred embodiment, the second end of the sun gear is detachably connected to one end of the central output shaft of the output shaft assembly, the second end of the central output shaft is detachably connected to the power input end of the generator component, and the lower housing is detachably mounted and fixed on the tower.

[0008] As a preferred embodiment, a bearing A is mounted on the outer side of the planetary carrier near the first end, and a bearing B is mounted on the outer side of the planetary carrier near the second end; the inner ring of bearing A is fixedly connected to the planetary carrier, the outer ring of bearing A is fixedly connected to the upper housing, the inner ring of bearing B is fixedly connected to the planetary carrier, and the outer ring of bearing B is fixedly connected to the upper housing.

[0009] As a preferred embodiment, the system also includes a bearing C, which is a thrust roller bearing. The bearing C is located near the bearing B and between the bearing A and the bearing B. The bearing C's race abuts against the shoulder of the planetary carrier, and the bearing C's seat race abuts against the shoulder of the upper housing.

[0010] As a preferred embodiment, the upper housing includes a front cover and a connecting plate, which are respectively fixed to both ends of the internal gear ring. Planetary gear bearings are installed inside the planetary gears, and the planetary gear bearings are installed on the planetary gear shafts. The planetary gear shafts are fixed in the planet carrier, and the planetary gear shafts are equidistantly distributed around the central axis of the planet carrier. The planetary gears mesh with the internal gear ring and the sun gear teeth respectively.

[0011] As a preferred embodiment, the second end of the sun gear is provided with an external spline around its shaft diameter, the first end of the central output shaft is provided with an internal spline that matches the external spline, and the second end of the central output shaft is connected to the power input shaft of the generator component by a key block.

[0012] As a preferred option, the external spline adopts a modified design.

[0013] As a preferred embodiment, the lower housing includes a rear cover and a transition flange. The rear cover has an axially formed cavity for mounting a central output shaft. The central output shaft is rotatably mounted in the rear cover via a bearing D. The rear cover is fixedly connected to the transition flange, and the transition flange is detachably connected to the tower.

[0014] As a preferred embodiment, two bearings D are provided, and the two bearings D are coaxially arranged. The outer circular surface of the central output shaft has a shoulder protrusion. The bearings D are respectively arranged on both sides of the shoulder protrusion. The rear cover is provided with a second shoulder. The outer ring of one bearing D abuts against the second shoulder, and the outer ring of the other bearing D is abutted and fixed by a through cover. The through cover has a hole through which the central output shaft passes, and the through cover is detachably connected to the rear cover.

[0015] The second objective of this invention is to provide a wind turbine generator set that adopts an integrated vertical axis wind turbine drive chain structure as described in any of the above-mentioned claims.

[0016] Beneficial Effects: This invention, through structural optimization, mounts the speed increaser component externally to the tower and uses oil bath lubrication. Compared to traditional structures where the bearing housing uses grease lubrication and the speed increaser is located inside the tower, this solution ensures the cleanliness of the lubrication system, reduces the difficulty of oil replacement, and effectively reduces maintenance costs. The integrated vertical axis wind turbine transmission chain structure proposed in this invention has a high degree of integration and a compact structure. It shortens the size and weight of the transmission chain, reduces the number of components (reducing frictional losses between components), effectively reduces power loss, and improves the overall transmission efficiency of the vertical axis wind turbine from wind energy capture to electrical energy output (in existing technologies, the wind turbine is often mounted on a bearing housing, which bears the wind load and gravity of the wind turbine; however, this structure increases structural complexity and maintenance difficulty). This solution, by fixing the wind turbine to the top connecting flange of the speed increaser component and using a single-stage planetary transmission, effectively bears the gravity and wind load from the wind turbine through a reasonable planetary carrier support bearing arrangement, ensuring reliable and stable operation of the wind turbine. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the invention 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 the invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 is a schematic diagram of the integrated vertical axis wind turbine transmission chain structure according to an embodiment of the present invention; Figure 2 is a schematic diagram of the planetary gear train assembly structure in the speed increaser component according to an embodiment of the present invention; Figure 3 is a schematic diagram of the output shaft assembly structure in the speed increaser component according to an embodiment of the present invention; Figure 4 is a schematic diagram of the generator component structure according to an embodiment of the present invention; Figure 5 is a schematic diagram of the wind turbine generator set structure according to the present invention; In the figures, the markings are: 1. Wind turbine; 2. Speed ​​increaser component; 21. First connecting piece; 22. Second connecting piece; 23. Third connecting piece; 24. Fourth connecting piece; 25. Planetary gear train assembly; 251. Upper housing; 2501. Flange coupling; 2502. End cover; 2503. Round nut; 2504. Bearing A; 2505. Front cover; 2506. Planetary carrier; 2507. Internal gear ring; 2508. Connecting disc; 2509. 1. Self-aligning roller bearing, 2510. Planetary gear shaft, 2511. Planetary gear, 2512. Sun gear, 2512-1. External spline, 2513. Bearing C, 2513-1. Shaft ring, 2513-2. Cage, 2513-3. Seat ring, 2514. Bearing B, 2515. Retaining ring, 2516. Planetary gear bearing, 26. Output shaft assembly, 261. Lower housing, 2601. Rear cover, 2602. Bearing D, 2603. Transition flange, 2604. Center output shaft, 2604-1. Internal spline, 2604-2. Keyway, 2604-3. Shaft hole, 2606. Through cover, 2607. Sealing device; 3. Generator components, 31. Fifth connecting piece, 32. Flat key, 33. Generator shaft, 34. Generator body, 35. Brake; 4. Tower. Detailed Implementation

[0019] The present invention will now be described in detail through exemplary embodiments. However, it should be understood that, without further description, elements, structures, and features in one embodiment may be advantageously incorporated into other embodiments.

[0020] It should be noted that, unless otherwise defined, the technical or scientific terms used herein should have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "a," "an," or "the," and similar words used in the specification and claims of this patent application do not express a limitation of quantity, but rather indicate the presence of at least one. Terms such as "comprising" or "including" indicate that the elements or objects preceding "comprising" encompass the elements or objects listed following "comprising" or "including" and their equivalents, but do not exclude other elements or objects having the same function.

[0021] As shown in the figure, this embodiment provides an integrated vertical axis wind turbine transmission chain structure, including a speed increaser component 2 and a generator component 3. The upper end of the speed increaser component 2 is the power input end, and the lower end is the power output end. The upper end of the speed increaser component 2 is connected to the wind turbine 1, and the lower end of the speed increaser component 2 is connected to the power input shaft of the generator component 3. The tower 4 forms an upward-opening cavity. The generator component 3 is fixedly installed inside the tower 4, and the speed increaser component 2 is fixedly installed on the tower 4 and placed outside the cavity of the tower 4. The purpose of this design is not only to withstand the weight and wind load of the wind turbine 1, but also to facilitate maintenance. At the same time, the rotation of the wind turbine 1 drives the speed increaser component 2 to rotate, thereby increasing the speed of the wind turbine 1 to the speed required by the generator component 3, and thus driving the stable operation of the generator component 3. This effectively shortens the transmission chain length of the vertical axis wind turbine, reduces the weight of the equipment, and improves the power generation efficiency of the wind turbine. In this solution, the speed increaser component 2 adopts oil bath lubrication. The speed increaser component 2 is installed on the outside of the tower 4 and uses oil bath lubrication. Compared to the traditional structure where the wind turbine 1 is installed on the bearing housing and uses grease lubrication (and the speed increaser component is located inside the tower 4 in the existing technology), this solution can ensure the cleanliness of the lubrication system, reduce the difficulty of oil replacement, effectively reduce maintenance costs, and allow maintenance and oil replacement operations to be completed without entering the tower 4. In this solution, the central axis of the wind turbine 1 is vertically oriented and coaxial with the central axis of the speed increaser component 2.

[0022] In this embodiment, the speed increaser component 2 includes a planetary gear train assembly 25 and an output shaft assembly 26. The planetary gear train assembly 25 and the output shaft assembly 26 are independent components that can be detachably connected. The planetary gear train assembly 25 is located on top of the output shaft assembly 26. The planetary gear train assembly 25 and the output shaft assembly 26 adopt an independent modular design. The detachable connection makes it easier to inspect, maintain and replace parts. The modular design allows the planetary gear train assembly 25 and the output shaft assembly 26 to be disassembled independently. When a single component fails, there is no need to disassemble the entire transmission chain, thus reducing the cost of spare parts replacement. The planetary gear train assembly 25 includes an upper housing 251 and planetary gear components, wherein the planetary gear components are located inside the upper housing 251. The upper housing 251 includes a front cover 2505, an internal gear ring 2507, and a connecting plate 2508. The internal gear ring 2507 is located between the front cover 2505 and the connecting plate 2508, and the three are fixedly connected by screws to form the upper housing 251. A cavity for mounting the planetary gear components is formed inside the upper housing 251. The planetary gear components include a planet carrier 2506 and a sun gear 2512, wherein the planet carrier 2506... The power input end of the wind turbine 1 is detachably connected. Specifically, the head end of the planetary carrier 2506 is provided with a flange coupling 2501. The flange coupling 2501 is fixedly connected to the wind turbine 1 through a first connecting member 21. Specifically, the first connecting member 21 is a bolt (it should be noted that in this solution, the connecting member preferably uses bolts but is not limited to bolt connection). With this design, the wind turbine 1 is directly fixedly connected to the speed increaser component 2, and through the improvement of the internal structure of the speed increaser component 2, it can effectively withstand the wind load and gravity from the wind turbine 1.

[0023] In a typical embodiment of the present invention, a mounting cavity is provided at the tail end of the planetary carrier 2506. The head end of the central shaft of the sun gear 2512 extends into the mounting cavity of the planetary carrier 2506, and the two are coaxially arranged. The first end of the central shaft of the sun gear 2512 is rotatably connected to the planetary carrier 2506 through a self-aligning roller bearing 2509 to adapt to coaxiality deviations and complex load conditions, ensuring transmission stability and durability. The tail end of the central shaft of the sun gear 2512 extends out of the planetary carrier 2506, and an external spline 2512-1 is provided at the end of its central shaft. The function of the external spline 2512-1 is to achieve meshing transmission with the output shaft assembly 26. The external spline 2512-1 adopts a modified design to realize the floating of the sun gear 2512 and ensure the load distribution of the planetary gear train.

[0024] The planetary gear assembly also includes planetary gears 2511 and planetary gear shafts 2510. The planetary gears 2511 are rotatably mounted on the planetary gear shafts 2510 of the planetary carrier 2506 via planetary gear bearings 2516. The planetary gear shafts 2510 are fixed within the planetary carrier 2506 and are evenly distributed around the central axis of the planetary carrier 2506. The planetary gears 2511 mesh with the external teeth of the sun gear 2512 and the internal teeth of the internal gear ring 2507, respectively. The planetary gear system assembly 25 of this invention employs a single-stage planetary transmission. Through a reasonable arrangement of the supporting bearings on the planetary carrier 2506, it effectively withstands the gravity and wind load from the wind turbine 1, ensuring the reliable and stable operation of the wind turbine 1.

[0025] In this design, the planetary carrier 2506 has an upper shoulder on its outer circumferential surface near the head end. A bearing A2504 is installed on the upper shoulder. The inner ring of the bearing A2504 is fixedly connected to the planetary carrier 2506. Specifically, the inner ring of the bearing A2504 and the shaft diameter of the planetary carrier 2506 are interference-fitted. The outer ring of the bearing A2504 is fixedly connected to the front cover 2505. One end of the bearing A2504 abuts against the upper shoulder of the planetary carrier 2506, and the other end abuts against and is fixed to the round nut 2503. Specifically, the internal thread of the round nut 2503 is screwed to the external thread of the outer edge of the shaft of the planetary carrier 2506. The outer ring of the bearing A2504 is abutted and fixed through the stop of the end cover 2502. Specifically, the end cover 2502 is fixedly connected to the front cover 2505 by bolts. The planetary carrier 2506 has a lower shoulder on its outer circumferential surface near the tail end. A bearing B2514 is installed on this lower shoulder. The inner ring of bearing B2514 is interference-fitted with the shaft diameter of the planetary carrier 2506. The outer ring of bearing B2514 is fixedly connected to the connecting disc 2508. One end of the inner ring of bearing B2514 abuts against the lower shoulder of the planetary carrier 2506, and the other end is fixed by a retaining ring 2515, which is installed in a groove at the tail end of the planetary carrier 2506. In this embodiment, both bearings A2504 and B2514 are cylindrical roller bearings, mainly used to bear the radial load of the wind turbine 1.

[0026] In this design, a bearing C2513 is also installed between the planetary carrier 2506 and the connecting plate 2508. Bearing C2513 is located between bearing A2504 and bearing B2514. More specifically, bearing C2513 is positioned close to and above bearing B2514 without contacting it. This structure can withstand the gravity and wind load from the impeller 1, ensuring the normal operation of the speed increaser component 2. The aforementioned bearings A, B, and C work together to adapt to the complex stress conditions of the vertical axis fan, reducing transmission interference caused by shaft misalignment and further reducing power loss.

[0027] In this design, bearing C2513 is a thrust roller bearing. Bearing C2513 includes a shaft ring 2513-1, a housing ring 2513-3, and a cage 2513-2. The inner hole of the shaft ring 2513-1 is mounted on the shaft diameter of the planetary carrier 2506 with a clearance fit. The outer circle of the housing ring 2513-3 is mounted on the connecting plate 2508 with a clearance fit. The planetary carrier 2506 has a shoulder for abutting against the outer side of the shaft ring 2513-1. The connecting plate 2508 has a first shoulder for supporting the housing ring 2513-3. Both the shaft shoulder and the first shoulder must have certain dimensions to withstand the force along the central axis of the planetary carrier 2506, thereby bearing the axial force.

[0028] In this embodiment, the output shaft assembly 26 includes a lower housing 261 and a central output shaft 2604 located within the lower housing 261. The lower housing 261 includes a rear cover 2601 and a transition flange 2603. The rear cover 2601 is detachably connected to the connecting plate 2508 via a second connector 22. The rear cover 2601 and the transition flange 2603 are detachably connected via a third connector 23. The transition flange 2603 and the tower 4 are detachably connected via a fourth connector 24. In this design, the second connector 22, the third connector 23, and the fourth connector 24 can all be bolts. The rear cover 2601 has an axially formed cavity for mounting the central output shaft 2604. The central output shaft 2604 is rotatably mounted within the rear cover 2601 via a bearing D2602. The rear cover 2601 is fixedly connected to the transition flange 2603. The bearing D2602 is a deep groove ball bearing. Two bearings D2602 are arranged along the central axis. The two bearings D2602 are deep groove ball bearing I and deep groove ball bearing II, respectively. Deep groove ball bearing I is located above deep groove ball bearing II. The outer surface of the central output shaft 2604 has a shoulder protrusion. The bearings D2602 are respectively located at both ends of the shoulder protrusion. Specifically, the inner rings of the two bearings D2602 abut against the shoulder protrusion. The rear cover 2601 is provided with a second shoulder. The outer ring of the upper bearing D2602 abuts against the second shoulder of the rear cover 2601, and the outer ring of the lower bearing D2602 is abutted and fixed by a through cover 2606. The through cover 2606 has a hole through which the central output shaft 2604 passes. The through cover 2606 is detachably connected to the rear cover 2601. The power input end face of the central output shaft 2604 has an internal spline 2604-1, which meshes with the external spline 2512-1 of the sun gear 2512 shaft end for transmission. The power output end face of the central output shaft 2604 has a shaft cavity 2604-3, and the keyway 2604-2 is formed on the inner wall of the shaft cavity 2604-3. The central output shaft 2604 is fixedly connected to the generator shaft 33 of the generator component 3 by a flat key 32. More specifically, deep groove ball bearing I and deep groove ball bearing II are installed on the outer diameter of the central output shaft 2604. The outer rings of the two bearings are installed on the rear cover 2601. The lower deep groove ball bearing II is axially positioned by a through cover 2606. A sealing device 2607 is provided on the through cover 2606 to effectively prevent the leakage of lubricating oil during the operation of the speed increaser component.

[0029] In this design, generator component 3 includes generator body 34 and brake 35. Generator body 34 is placed inside the cylinder cavity of tower 4. Generator shaft 33 of generator body 34 passes through the hole of transition flange 2603 from bottom to top and is fixedly connected to the power output end of center output shaft 2604 via flat key 32, realizing the transmission of power from center output shaft 2604 to generator shaft 33. Generator component 3 is fixed to transition flange 2603 via fifth connector 31; fifth connector 31 is connected by screws or bolts. Specifically, brake 35 is installed on the lower side of generator body 34, and fifth connector 31 passes through the fixing hole of generator body 34 from bottom to top and is tightened and fixed to transition flange 2603. In this design, brake 35 adopts electromagnetic braking and is a normally open structure to realize emergency braking of wind turbine under special circumstances.

[0030] The present invention also provides a wind turbine generator set, including the above-described integrated vertical axis wind turbine drive train structure. Through the above structural improvements, the wind turbine generator set of the present invention has a high degree of overall integration and a compact structure, shortening the size and weight of the drive train, reducing the number of components, effectively reducing power loss, and improving the overall transmission efficiency of the vertical axis wind turbine from wind energy capture to electrical energy output.

[0031] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. An integrated vertical axis fan drive chain structure, characterized in that... The device includes a speed increaser component (2), which is lubricated by an oil bath. The power input end of the speed increaser component (2) is detachably connected to the wind turbine (1). The speed increaser component (2) is coaxially arranged with the wind turbine (1). The power output end of the speed increaser component (2) is connected to the power input shaft of the generator component (3). The speed increaser component (2) is fixedly installed on the tower (4) and located outside the tower (4). The generator component (3) is located inside the tower (4). The speed increaser component (2) includes a planetary gear train assembly (25) and an output shaft assembly (26), which are detachably connected.

2. The integrated vertical axis fan drive chain structure according to claim 1, characterized in that... The planetary gear assembly (25) includes an upper housing (251) and planetary gear components disposed within the upper housing (251); the output shaft assembly (26) includes a lower housing (261) and a central output shaft (2604) disposed within the lower housing (261); the upper housing (251) and the lower housing (261) are detachably connected; the planetary gear components include a planet carrier (2506) and a sun gear (2512); the power input end of the planet carrier (2506) is detachably connected to the wind turbine (1); the first end of the sun gear (2512) is mounted in the planet carrier (2506) via a self-aligning roller bearing (2509).

3. The integrated vertical axis fan drive chain structure according to claim 2, characterized in that... The second end of the sun gear (2512) is detachably connected to one end of the central output shaft (2604) of the output shaft assembly (26), the second end of the central output shaft (2604) is detachably connected to the power input end of the generator component (3), and the lower housing (261) is detachably installed and fixed on the tower (4).

4. An integrated vertical axis fan drive chain structure according to claim 2 or 3, characterized in that... A bearing A (2504) is mounted on the outer side of the planetary carrier (2506) near the first end, and a bearing B (2514) is mounted on the outer side of the planetary carrier (2506) near the second end. The inner ring of the bearing A (2504) is fixedly connected to the planetary carrier (2506), and the outer ring of the bearing A (2504) is fixedly connected to the upper housing (251). The inner ring of the bearing B (2514) is fixedly connected to the planetary carrier (2506), and the outer ring of the bearing B (2514) is fixedly connected to the upper housing (251).

5. The integrated vertical axis fan drive chain structure according to claim 4, characterized in that... It also includes bearing C (2513), which is a thrust roller bearing. Bearing C (2513) is located near the side of bearing B (2514) and between bearing A (2504) and bearing B (2514). The bearing ring (2513-1) of bearing C (2513) abuts against the shoulder of planetary carrier (2506), and the seat ring (2513-3) of bearing C (2513) abuts against the shoulder of upper housing (251).

6. An integrated vertical axis fan drive chain structure according to claim 2 or 3, characterized in that... The upper housing (251) includes a front cover (2505) and a connecting plate (2508). The front cover (2505) and the connecting plate (2508) are respectively fixed at both ends of the internal gear ring (2507). Planetary gear bearings (2516) are installed inside the planetary gears (2511). The planetary gear bearings (2516) are installed on the planetary gear shafts (2510). The planetary gear shafts (2510) are fixed in the planet carrier (2506). The planetary gear shafts (2510) are equidistantly distributed around the central axis of the planet carrier (2506). The planetary gears (2511) mesh with the internal gear ring (2507) and the sun gear (2512) respectively.

7. The integrated vertical axis fan drive chain structure according to claim 3, characterized in that... The second end of the sun gear (2512) is provided with an external spline (2512-1) on its outer periphery, and the first end of the center output shaft (2604) is provided with an internal spline that is compatible with the external spline (2512-1). The second end of the center output shaft (2604) is connected to the power input shaft of the generator component (3) by a key block.

8. The integrated vertical axis fan drive chain structure according to claim 7, characterized in that... The external spline (2512-1) adopts a modified design.

9. The integrated vertical axis fan drive chain structure according to claim 3, characterized in that... The lower housing (261) includes a rear cover (2601) and a transition flange (2603). The rear cover (2601) has an axial cavity for mounting a center output shaft (2604). The center output shaft (2604) is rotatably mounted in the rear cover (2601) via a bearing D (2602). The rear cover (2601) is fixedly connected to the transition flange (2603), and the transition flange (2603) is detachably connected to the tower (4).

10. An integrated vertical axis fan drive chain structure according to claim 9, characterized in that... Two bearings D (2602) are provided, and the two bearings D (2602) are coaxially arranged. The outer surface of the central output shaft (2604) has a shoulder protrusion. The bearings D (2602) are respectively arranged on both sides of the shoulder protrusion. The rear cover (2601) is provided with a second shoulder. The outer ring of one bearing D (2602) abuts against the second shoulder, and the outer ring of the other bearing D (2602) is abutted and fixed by a through cover (2606). The through cover (2606) has a hole through which the central output shaft (2604) passes. The through cover (2606) is detachably connected to the rear cover (2601).

11. A wind turbine generator set, characterized in that... The integrated vertical axis fan drive chain structure described in any one of claims 1-10 is adopted.

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