A compact wind turbine gearbox

Abstract

The application relates to the technical field of wind generating set, in particular to a compact wind power gear box, which comprises a middle box body, the middle box body comprises a front end plate, an outer shell and a rear end plate, the outer diameter of the front end plate is larger than that of the rear end plate, the outer shell is inwardly recessed to form a U-shaped groove with the front end plate and the rear end plate, the bottom of the middle box body is provided with an oil tank mounting boss, the top of an oil tank is embedded into the U-shaped groove, and the two sides of the middle box body are respectively provided with an electric control box mounting boss and an oil pump mounting boss. The application can solve the problem that the existing gear box structure layout is unreasonable, leading to the problem that the overall volume of the gear box is large.

Description

Technical Field

[0001] This invention relates to the field of wind turbine generator technology, specifically a compact wind turbine gearbox. Background Technology

[0002] The gearbox is a crucial mechanical component in a wind turbine generator. Its primary function is to transmit the power generated by the wind turbine under wind conditions to the generator, enabling it to achieve the appropriate rotational speed. Depending on the specific needs, wind turbine generators are typically installed in windy locations such as mountains, wilderness areas, beaches, and islands. Currently, with the development of my country's wind power industry, the megawatt-level of wind turbine gearboxes is becoming increasingly larger, requiring more sophisticated structural arrangements. Generally, the larger the megawatt rating, the larger the overall structure of the gearbox. However, this increased gearbox size brings significant inconvenience to hoisting and subsequent maintenance.

[0003] For example, the 8MW three-stage planetary gear transmission gearbox used by our company includes a front cover, a first-stage transmission housing, a first-stage intermediate housing, a second-stage transmission housing, a second-stage intermediate housing, a third-stage transmission housing, and a rear cover. The oil tank used to supply oil to the transmission system is usually installed at the bottom of the rear cover, while parts such as the oil pump are mounted on the first-stage intermediate housing via brackets. This traditional layout increases the radial dimension of the gearbox, making it difficult to meet the current market demand for compact and miniaturized gearboxes. Summary of the Invention

[0004] The present invention aims to provide a compact wind turbine gearbox to solve the problem that the existing gearbox structure layout is unreasonable, resulting in a large overall size of the gearbox.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A compact wind turbine gearbox includes a middle housing, which includes a front end plate, an outer shell, and a rear end plate. The outer diameter of the front end plate is larger than that of the rear end plate. The outer shell is recessed inward and forms an annular U-shaped groove with the front end plate and the rear end plate. The bottom of the middle housing is provided with an oil tank mounting boss, and the top of the oil tank is embedded in the U-shaped groove. The sides of the middle housing are respectively provided with an electrical control box mounting boss and an oil pump mounting boss.

[0007] The principles and advantages of this scheme are:

[0008] 1. By setting an annular U-shaped groove on the middle housing, the front plate of the middle housing is connected to the front gear ring and the rear plate is connected to the rear gear ring during use. The U-shaped groove formed in the middle can be used to arrange components such as the oil supply device, so that the space of the gearbox can be fully utilized. For example, the oil tank can be installed on the oil tank mounting boss, and its top is embedded in the U-shaped groove, which can save the height occupied by the oil tank, reduce the radial dimension of the gearbox, and reduce the volume of the entire engine compartment.

[0009] 2. The electrical control box and oil pump are installed on both sides of the middle box, so that the oil supply device and electrical control part are integrated on the middle box. Compared with the traditional decentralized layout, the layout of this application is more compact and reasonable, and the middle box has multiple functions. It is also easier to carry out subsequent maintenance work and reduce the maintenance difficulty.

[0010] Preferably, as an improvement, the fuel tank mounting boss, the electrical control box mounting boss, and the fuel pump mounting boss are all located at corresponding positions on the front and rear plates.

[0011] Beneficial effects: Placing the mounting bosses on the front and rear plates provides greater stability compared to placing them on the outer casing. Furthermore, the front and rear plates protrude from the outer casing surface, making them easier to assemble and disassemble.

[0012] Preferably, as an improvement, the top of the outer casing is also provided with a dryer mounting boss, an observation window boss, a venting interface, and an oil inlet, and the dryer mounting boss, the observation window boss, the venting interface, and the oil inlet are all located within the U-shaped groove.

[0013] Beneficial effects: Setting the boss, interface, etc., inside the U-shaped groove can make full use of the space inside the U-shaped groove. Compared with setting them out of the box, it takes up less space and has a more beautiful shape; the dryer is used to absorb moisture inside and outside the gearbox and reduce corrosion; the observation window can be set to observe the operation of the internal gears through an endoscope; the vent is used to balance the pressure inside the filter.

[0014] Preferably, as an improvement, an oil return port is provided at the bottom of the outer casing, and the oil return port is connected to the oil tank.

[0015] Beneficial effects: The lubricating oil used in the transmission system first flows to the middle housing, and then flows into the oil tank through the oil return port at the bottom of the middle housing. The oil circuit structure is simple, the transmission route is short, and the failure rate is low.

[0016] Preferably, as an improvement, the front end plate is provided with a front stop for connecting with the gear ring at the front of the middle housing; the rear end plate is provided with a rear stop for connecting with the gear ring at the rear of the middle housing. The front and rear stops facilitate centering and positioning.

[0017] Preferably, as an improvement, several reinforcing plates are also provided inside the U-shaped channel. This helps to improve the strength of the middle housing and ensure its service life.

[0018] Preferably, as an improvement, the electrical control box mounting boss is located on the right side of the middle box, the oil pump mounting boss is located on the left side of the middle box, and a filter mounting bracket is also provided on the oil pump mounting boss. Attached Figure Description

[0019] Figure 1 This is a front view of the housing in this invention;

[0020] Figure 2 This is a left view of the box body in this invention;

[0021] Figure 3 This is a right view of the housing in this invention;

[0022] Figure 4 for Figure 1 A cross-sectional view along the PP direction;

[0023] Figure 5 This is a top view of the housing in this invention;

[0024] Figure 6 This is a simplified structural diagram of the wind turbine gearbox of the present invention. Detailed Implementation

[0025] The following detailed description illustrates the specific implementation method:

[0026] The markings in the accompanying drawings include: middle housing 1, front end plate 111, rear end plate 112, secondary transmission housing 101, tertiary transmission housing 102, front stop 2, rear stop 3, oil inlet 4, oil return port 5, electrical control box mounting boss 6, electrical control box 61, U-shaped groove 7, reinforcing plate 71, oil pump mounting boss 8, oil tank mounting boss 9, oil tank 91, observation window boss 10, dryer mounting boss 11, and vent 12.

[0027] Example

[0028] like Figure 1-6 As shown, a compact wind turbine gearbox includes a middle housing 1. This embodiment uses a three-stage planetary gear transmission as an example for detailed explanation. Figure 6 As shown, the intermediate housing 1 is a secondary intermediate housing, with its front end connected to the secondary transmission housing 101 and its rear end connected to the tertiary transmission housing 102. It should be noted that the intermediate housing 1 in this application is not limited to a secondary intermediate housing. In a secondary planetary gear transmission structure, the intermediate housing 1 is used to connect the primary transmission housing and the secondary transmission housing.

[0029] like Figure 2 As shown, the middle box 1 in this embodiment includes a front end plate 111, a shell, and a rear end plate 112. The outer diameter of the front end plate 111 is larger than the outer diameter of the rear end plate 112, as shown below. Figure 4 As shown, a front stop 2 is provided on the front end plate 111, which is connected to the secondary gear ring of the secondary transmission housing 101. A rear stop 3 is provided on the rear end plate 112, which is connected to the tertiary gear ring of the tertiary transmission housing 102. The outer shell is recessed inward to form an annular U-shaped groove 7 with the front end plate 111 and the rear end plate 112. Several reinforcing plates 71 are provided in the U-shaped groove 7.

[0030] like Figure 1As shown, the bottom of the middle housing 1 is provided with an oil tank mounting boss 9, and the top of the oil tank 91 is embedded in the U-shaped groove 7, as shown. Figure 2-3 As shown, the two sides of the middle box 1 are respectively provided with an electrical control box mounting boss 6 and an oil pump mounting boss 8. The oil tank mounting boss 9, the electrical control box mounting boss 6, and the oil pump mounting boss 8 are all located at the corresponding positions of the front end plate 111 and the rear end plate 112.

[0031] In this embodiment, the electrical control box mounting boss 6 is located on the right side of the middle box 1 and is used to install the electrical control box 61. The electrical control box 61 is provided with several circuit interfaces, such as a temperature sensor interface. The temperature sensor is used to detect the temperature inside the gearbox in real time and transmit the detected data to the main controller through the electrical control box 61. The oil pump mounting boss 8 is located on the left side of the middle box 1 and is used to install the electric pump. The oil pump mounting boss 8 is also provided with a filter mounting bracket (not shown in the figure) for installing the filter. One end of the electric pump is connected to the oil tank 91 through a pipe, and the other end is connected to the filter.

[0032] like Figure 4 , 5 As shown, the top of the housing is provided with a dryer mounting boss 11, an observation window boss 10, a vent 12, and an oil inlet 4, and the dryer mounting boss 11, the observation window boss 10, the vent 12, and the oil inlet 4 are all located within the U-shaped groove 7; specifically, the dryer is an air drying filter, mainly used to maintain internal and external pressure balance and absorb internal moisture to reduce corrosion; an endoscope can be installed through the observation window boss 10 to observe the operation of the internal gears; the vent 12 is used to balance the pressure inside the filter.

[0033] like Figure 4 As shown, an oil return port 5 is provided at the bottom of the outer casing, which is connected to the oil tank 91. The outlet of the filter is connected to the inlet 4. An electric pump is used to pump the oil in the oil tank 91 into the filter. After being filtered, the oil enters the middle housing 1 through the inlet 4 from the outlet of the filter to supply oil to the transmission system, thereby realizing internal circulation oil supply.

[0034] This application improves the structure of the intermediate housing 1, integrating the oil supply device (such as oil tank 91, electric pump, filter), electrical control box 61, etc., onto the intermediate housing 1. An oil inlet 4 is provided on the upper part of the outer shell of the intermediate housing 1, and an oil return port 5 is provided on the lower part to ensure oil intake and return for the gearbox. The entire intermediate housing 1 has an elegant shape, integrates multiple functions, and has a very compact structure, greatly reducing the size and weight of the entire gearbox, thereby reducing product manufacturing costs and giving it a significant competitive advantage in the market. In addition, due to the integrated design, it is also easier to carry out subsequent maintenance work, reducing maintenance difficulty compared to the traditional decentralized layout.

[0035] The above descriptions are merely embodiments of the present invention, and common knowledge such as specific technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solutions of the present invention, and these should also be considered within the scope of protection of the present invention. These modifications and improvements will not affect the effectiveness of the implementation of the present invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A compact wind turbine gearbox, comprising a middle housing, the middle housing including a front end plate, a outer shell, and a rear end plate, characterized in that, The outer diameter of the front end plate is larger than that of the rear end plate. The outer shell is recessed inward to form an annular U-shaped groove with the front end plate and the rear end plate. The bottom of the middle box is provided with an oil tank mounting boss, and the top of the oil tank is embedded in the U-shaped groove. The sides of the middle box are respectively provided with an electrical control box mounting boss and an oil pump mounting boss. The top of the outer casing is also provided with a dryer mounting boss, an observation window boss, a venting interface, and an oil inlet, and the dryer mounting boss, the observation window boss, the venting interface, and the oil inlet are all located in a U-shaped groove.

2. A compact wind turbine gearbox according to claim 1, characterized in that: The mounting bosses for the fuel tank, electrical control box, and fuel pump are all located at corresponding positions on the front and rear plates.

3. A compact wind turbine gearbox according to claim 1, characterized in that: An oil return port is provided at the bottom of the outer casing, and the oil return port is connected to the oil tank.

4. A compact wind turbine gearbox according to claim 3, characterized in that: The front end plate is provided with a front stop, which is used to connect with the gear ring in front of the middle housing; the rear end plate is provided with a rear stop, which is used to connect with the gear ring in rear of the middle housing.

5. A compact wind turbine gearbox according to claim 4, characterized in that: Several reinforcing plates are also provided inside the U-shaped groove.

6. A compact wind turbine gearbox according to claim 1, characterized in that: The electrical control box mounting boss is located on the right side of the middle box, the oil pump mounting boss is located on the left side of the middle box, and a filter mounting bracket is also provided on the oil pump mounting boss.

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