Semi-direct-drive wind power transmission system and wind turbine generator

By dividing the gearbox into a main box and a sub-box, and connecting the output shaft group to the sub-box, convenient maintenance of the semi-direct drive wind power transmission system is achieved, solving the problems of difficult and high maintenance costs, and improving maintenance efficiency and space utilization.

CN223414721UActive Publication Date: 2025-10-03NANJING HIGH SPEED GEAR MFG
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Patent Information

Application Number
CN202422853728.0
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-11-22
Publication Date
2025-10-03
Estimated Expiration
2034-11-22

AI Technical Summary

Technical Problem

Existing semi-direct drive wind power transmission systems are difficult to maintain and have high maintenance costs. In particular, when the gearbox shaft system fails, the generator and output shaft need to be disassembled separately, which is complicated to operate and difficult to perform at high altitude.

Method used

The gearbox body is designed to be composed of a main body and a sub-body. The output shaft assembly is connected to the sub-body, allowing the sub-body to drive the output shaft assembly and the rotor axially out of the main body, thereby facilitating maintenance and simplifying the maintenance process.

Benefits of technology

It reduces maintenance difficulty and cost, simplifies maintenance operations, improves space utilization, reduces the need for generator disassembly, and enhances the convenience and safety of maintenance.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model belongs to the technical field of wind power equipment, and discloses a semi-direct-drive wind power transmission system and a wind turbine generator, and the semi-direct-drive wind power transmission system comprises a gear box and a generator; the gear box comprises a main box body and a transmission mechanism, the transmission mechanism is arranged in the main box body, a branch box body is detachably arranged on the side, facing the output end of the transmission mechanism, of the main box body, and an output shaft set of the transmission mechanism is arranged in the branch box body; a rotor is arranged in the generator and connected to the output shaft set, and the branch box body is configured to be capable of driving the output shaft set and the rotor to be detached out of the main box body together in the axial direction of the output shaft set so that the output shaft set of the gearbox can be maintained conveniently. According to the semi-direct-drive wind power transmission system, the sub-box body and the main box body can be directly disassembled when the output shaft set breaks down and needs to be maintained, then the output shaft set, the rotor and the sub-box body are disassembled together from the generator side, maintenance of the output shaft set of the semi-direct-drive wind power transmission system can be achieved, operation is easy, overall replacement is not needed, and cost is low.
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Description

Technical Field

[0001] The utility model relates to the technical field of wind power equipment, in particular to a semi-direct drive wind power transmission system and a wind turbine generator set. Background Art

[0002] With the continuous development of wind turbine gearboxes, semi-direct drive gearboxes have gradually developed. Currently, wind turbines using semi-direct drive gearboxes adopt an integrated design, integrating the generator and the semi-direct drive gearbox. After installation, these wind turbines are installed at a high position on the wind turbine tower, making maintenance of these wind turbines more difficult and costly.

[0003] When the output shaft system of an existing semi-direct-drive wind turbine transmission system fails and needs maintenance, maintenance personnel need to separate the generator rotor from the output shaft, that is, they need to remove the entire semi-direct-drive wind turbine transmission system or disassemble the generator, which is costly to maintain. In addition, the semi-direct-drive wind turbine transmission system is located at a high place, making it difficult for maintenance personnel to operate and making maintenance more difficult.

[0004] Therefore, there is an urgent need for a semi-direct drive wind power transmission system and a wind turbine generator set to solve the above technical problems. Utility Model Content

[0005] One purpose of the utility model is to provide a semi-direct drive wind power transmission system, which can reduce the difficulty of its own maintenance, facilitate the replacement of the shaft system of the gear box on the tower, and has high maintainability and low cost.

[0006] To achieve this purpose, the present invention adopts the following technical solutions:

[0007] Semi-direct drive wind turbine transmission system, including:

[0008] The gearbox comprises a main housing and a transmission mechanism, wherein the transmission mechanism is disposed in the main housing, and a sub-housing is detachably disposed on one side of the main housing facing the output end of the transmission mechanism, wherein the output shaft assembly of the transmission mechanism is disposed in the sub-housing;

[0009] A generator, wherein a rotor is provided in the generator and the rotor is connected to the output shaft assembly;

[0010] The sub-box body is configured to be able to drive the output shaft group and the rotor to be removed from the main box body along the axial direction of the output shaft group, so as to facilitate maintenance of the output shaft group of the gear box.

[0011] Optionally, one of the main box body and the sub-box body is provided with a first connecting portion, and the other is provided with a second connecting portion, and the first connecting portion and the second connecting portion are arranged in coordination.

[0012] Optionally, the main box body and the sub-box body are connected by bolts.

[0013] Optionally, one of the main box body and the sub-box body is provided with a positioning pin, and the other is provided with a positioning hole, and the positioning pin is inserted into the positioning hole.

[0014] Optionally, the main box body is provided with a plurality of bosses along its circumference for installing and disassembling tooling.

[0015] Optionally, a threaded hole is provided on the boss, and the threaded hole is used for threaded connection to the disassembly and assembly tool.

[0016] Optionally, the output shaft assembly includes an output shaft and a bearing, and a bearing is provided between the output shaft and the sub-box body.

[0017] Optionally, the transmission mechanism further includes several stages of planetary gear trains and shaft systems, the planetary gear trains are arranged on the periphery of the shaft system, and an output shaft group is provided at the output end of the shaft system.

[0018] Optionally, the rotor and the output shaft assembly are connected via fasteners.

[0019] Another object of the present invention is to provide a wind turbine generator set, comprising the semi-direct drive wind power transmission system described in any of the above schemes; the wind turbine generator set can reduce the difficulty of its own maintenance, facilitate the replacement of the gear box shaft system on the tower, and has high maintainability and low cost.

[0020] Beneficial effects of the utility model:

[0021] The utility model provides a semi-direct-drive wind power transmission system and a wind turbine generator set. By dividing the gearbox housing into a main housing and a sub-housing, and connecting the output shaft assembly to the sub-housing, when the output shaft assembly fails and requires maintenance, maintenance personnel can directly remove the sub-housing from the main housing, then remove the output shaft assembly, rotor, and sub-housing from the generator side, and then replace and maintain damaged parts. Maintenance of the output shaft assembly of the semi-direct-drive wind power transmission system can be achieved in a simple manner, without the need to dismantle the generator and separate the rotor from the output shaft assembly 130 for maintenance, resulting in low maintenance costs. In addition, the semi-direct-drive wind power transmission system integrates the generator and the gearbox, simplifying the size of the semi-direct-drive wind power transmission system and improving the space utilization of the semi-direct-drive wind power transmission system. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a cross-sectional view of a partial structure of a semi-direct drive wind power transmission system provided by a specific embodiment of the present utility model;

[0023] Figure 2 It is a right side view of the main box provided by a specific embodiment of the present utility model.

[0024] In the picture:

[0025] 110, main housing; 111, first connecting portion; 112, boss; 1121, threaded hole; 120, sub-housing; 121, second connecting portion; 130, output shaft assembly; 131, output shaft; 132, bearing; 140, sun gear;

[0026] 210, rotor; 300, bolt. DETAILED DESCRIPTION

[0027] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of its components.

[0028] In the description of this utility model, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0029] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0030] In the description of this embodiment, the terms "upper," "lower," "right," and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplified operation. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0031] Refer to the following Figure 1 and Figure 2 The semi-direct drive wind power transmission system and wind turbine generator set provided by the present invention are described.

[0032] Existing semi-direct-drive wind turbine transmission systems integrate the gearbox and generator. On the generator side of the gearbox, the output shaft and generator are integrated. This means the generator rotor is directly attached to the output shaft, and the generator housing is directly connected to the generator side of the gearbox. If the gearbox output shafting fails, the generator, rotor, and output shaft must be disassembled before the output shafting can be removed from the gearbox and replaced. This leads to high maintenance costs and is difficult due to the high altitude location of the semi-direct-drive wind turbine transmission system.

[0033] To solve the above technical problems, please refer to Figure 1 Specifically, the semi-direct drive wind power transmission system includes a gearbox and a generator; the gearbox includes a main box body 110 and a transmission mechanism, the transmission mechanism is arranged in the main box body 110, and a sub-box body 120 is detachably provided on the side of the main box body 110 facing the output end of the transmission mechanism, and the output shaft group 130 of the transmission mechanism is provided in the sub-box body 120; a rotor 210 is provided in the generator, and the rotor 210 is connected to the output shaft group 130; the sub-box body 120 is configured to be able to drive the output shaft group 130 and the rotor 210 to be removed from the main box body 110 along the axial direction of the output shaft group 130, so as to facilitate maintenance of the output shaft group 130 of the gearbox.

[0034] The semi-direct-drive wind power transmission system of this embodiment is generally installed on a wind power tower. By dividing the gearbox housing into a main housing 110 and a sub-housing 120, and connecting the output shaft assembly 130 to the sub-housing 120, when the output shaft assembly 130 fails and needs maintenance, the maintenance personnel can directly remove the sub-housing 120 from the main housing 110, and then remove the output shaft assembly 130, the rotor 210, and the sub-housing 120 from the generator side. After replacing and maintaining the damaged parts, the output shaft assembly 130 of the semi-direct-drive wind power transmission system can be maintained. The operation is simple, and there is no need to dismantle the generator and separate the rotor 210 from the output shaft assembly 130 for maintenance, so the maintenance cost is low. In addition, the semi-direct-drive wind power transmission system integrates the generator and the gearbox, which simplifies the size of the semi-direct-drive wind power transmission system and improves the space utilization rate of the semi-direct-drive wind power transmission system.

[0035] Optionally, the main box body 110 is provided with a disassembly tool to facilitate the connection and disassembly between the main box body 110 and the sub-box body 120, further avoiding the need for maintenance personnel to climb high, and improving the safety and convenience of maintenance.

[0036] In this embodiment, the main box body 110 and the sub-box body 120 are connected by bolts 300, so that the main box body 110 and the sub-box body 120 can be detachably connected.

[0037] Specifically, the main box body 110 has a plurality of connecting holes along its circumference on one end face facing the sub-box body 120, and the sub-box body 120 has a plurality of through holes correspondingly. The bolts 300 pass through the through holes and the connecting holes and are threadedly connected to the connecting holes to achieve a fixed connection between the main box body 110 and the sub-box body 120.

[0038] It is understandable that, in other embodiments, the main box body 110 and the sub-box body 120 may also be connected by other detachable connection methods such as snap connection, pin connection, etc., which are not specifically limited here.

[0039] Furthermore, one of the main box body 110 and the sub-box body 120 is provided with a first connecting portion 111, and the other is provided with a second connecting portion 121. The first connecting portion 111 and the second connecting portion 121 are arranged in coordination, which makes it easier to install, limit and position the main box body 110 and the sub-box body 120.

[0040] Specifically, the first connecting part 111 is provided with an L-shaped stop, and the second connecting part 121 is provided with an L-shaped stop that cooperates with it. The first connecting part 111 and the second connecting part 121 are overlapped through the L-shaped stop, which can not only limit the main box body 110 and the sub-box body 120 to each other in the axial and radial directions of the semi-direct drive wind power transmission system, but also facilitate the overlap and cooperation between the two, thereby facilitating the positioning and installation of the main box body 110 and the sub-box body 120.

[0041] Furthermore, one of the main box body 110 and the sub-box body 120 is provided with a positioning pin, and the other is provided with a positioning hole. The positioning pin is inserted into the positioning hole, which makes it easier to dock and position the main box body 110 and the sub-box body 120, thereby facilitating the installation of the main box body 110 and the sub-box body 120 and improving the disassembly and assembly speed between the main box body 110 and the sub-box body 120.

[0042] Optionally, multiple positioning pins and positioning holes are provided correspondingly, and the multiple positioning pins and the multiple positioning holes are arranged in a one-to-one correspondence along their own circumferential intervals, thereby improving the position accuracy when the main box body 110 and the sub-box body 120 are connected. At the same time, they are fixed with bolts 300 to better improve the connection strength between the main box body 110 and the sub-box body 120.

[0043] Please refer to Figure 2 Furthermore, the main box body 110 is provided with a plurality of bosses 112 along its circumference for installing and disassembling tooling. By installing the disassembly tooling on the main box body 110, that is, the operator can remotely operate the disassembly tooling to realize the disassembly of the sub-box body 120 and the main box body 110, and then realize the disassembly and assembly of the output shaft group 130 of the semi-direct drive wind power transmission system.

[0044] Optionally, the boss 112 is provided with a threaded hole 1121, which is used to be threadedly connected to the disassembly tool, thereby fixing the disassembly tool to the main case 110. Specifically, the boss 112 and the disassembly tool are mounted using mounting bolts. After the boss 112 and the mounting portion of the disassembly tool are overlapped, the mounting bolts pass through the disassembly tool and are threadedly connected to the threaded hole 1121, thereby achieving a fixed connection between the disassembly tool and the main case 110.

[0045] Further optionally, the number of bosses 112 is the same as the number of mounting portions of the disassembly tool, and they are connected one-to-one to achieve a fixed connection between the disassembly tool and the main box 110. For example, in this embodiment, there are four bosses 112, and the mounting portions of the disassembly tool are also four correspondingly provided, so that a stable connection between the disassembly tool and the main box 110 can be achieved.

[0046] Please continue to refer to Figure 1 Furthermore, the output shaft group 130 includes an output shaft 131 and a bearing 132. A bearing 132 is provided between the output shaft 131 and the sub-box body 120 to realize the connection between the output shaft group 130 and the sub-box body 120. It is used to support the output shaft 131 and the sub-box body 120. Moreover, the bearing 132 can jointly support the output shaft group 130 of the gearbox and the rotor 210 of the generator, thereby simplifying the component structure and improving the integration between the generator and the gearbox.

[0047] In this embodiment, the transmission mechanism also includes several stages of planetary gear trains and shaft systems. The planetary gear trains are arranged on the periphery of the shaft system, and an output shaft group 130 is provided at the output end of the shaft system. The planetary gear trains are used for speed change and power transmission of the gearbox, and the shaft system is used to carry the planetary gear trains.

[0048] It should be noted that the planetary gear train is composed of a combination of planetary gears, a sun gear 140 and an inner gear ring to achieve the transmission function of the planetary gear train. Its specific structure is commonly used in the art and will not be described in detail here.

[0049] Optionally, the rotor 210 and the output shaft assembly 130 are connected by fasteners to achieve a fixed connection between the rotor 210 and the output shaft assembly 130, thereby achieving the integration of the generator and the gearbox of the semi-direct drive wind power transmission system.

[0050] This embodiment further provides a wind turbine generator set, which includes the semi-direct drive wind power transmission system described in any of the above solutions. It has all the beneficial effects of the above semi-direct drive wind power transmission system and will not be repeated here.

[0051] Obviously, the above-described embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the manner in which the present invention is to be implemented. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. Semi-direct drive wind power transmission system, characterized in that: include: A gearbox, comprising a main box body (110) and a transmission mechanism, wherein the transmission mechanism is disposed in the main box body (110), a sub-box body (120) is detachably disposed on a side of the main box body (110) facing an output end of the transmission mechanism, and an output shaft assembly (130) of the transmission mechanism is disposed in the sub-box body (120); A generator, wherein a rotor (210) is provided in the generator, and the rotor (210) is connected to the output shaft assembly (130); The sub-box body (120) is configured to be able to drive the output shaft group (130) and the rotor (210) to be removed from the main box body (110) along the axial direction of the output shaft group (130), so as to facilitate maintenance of the output shaft group (130) of the gear box.

2. The semi-direct drive wind power transmission system according to claim 1, characterized in that: One of the main box body (110) and the sub-box body (120) is provided with a first connecting portion (111), and the other is provided with a second connecting portion (121), and the first connecting portion (111) and the second connecting portion (121) are arranged in coordination.

3. The semi-direct drive wind power transmission system according to claim 1, characterized in that: The main box body (110) and the sub-box body (120) are connected by bolts (300).

4. The semi-direct drive wind power transmission system according to claim 1, characterized in that: One of the main box body (110) and the sub-box body (120) is provided with a positioning pin, and the other is provided with a positioning hole, and the positioning pin is inserted into the positioning hole.

5. The semi-direct drive wind power transmission system according to claim 1, characterized in that: The main box body (110) is provided with a plurality of bosses (112) along its circumference for installing and disassembling tooling.

6. The semi-direct drive wind power transmission system according to claim 5, characterized in that: The boss (112) is provided with a threaded hole (1121), and the threaded hole (1121) is used for threaded connection to the disassembly and assembly tool.

7. The semi-direct drive wind power transmission system according to claim 1, characterized in that: The output shaft assembly (130) includes an output shaft (131) and a bearing (132), and a bearing (132) is provided between the output shaft (131) and the sub-box body (120).

8. The semi-direct drive wind power transmission system according to claim 1, characterized in that: The transmission mechanism further comprises a plurality of stages of planetary gear trains and a shaft system. The planetary gear trains are arranged on the periphery of the shaft system, and an output shaft group (130) is arranged at the output end of the shaft system.

9. The semi-direct drive wind power transmission system according to claim 1, characterized in that: The rotor (210) and the output shaft assembly (130) are connected via fasteners.

10. A wind turbine generator system, characterized in that: It comprises the semi-direct drive wind power transmission system according to any one of claims 1 to 9.