A gearbox cooling device for wind turbine generators

Abstract

This invention provides a cooling device for a wind turbine gearbox, comprising a wind turbine gearbox; a housing and a cooling tank are respectively arranged on both sides of the gearbox; a heat exchanger is fixedly installed on one side of the housing, one end of the heat exchanger is fixedly connected to a first cooling pipe, the other end of the first cooling pipe is fixedly connected to a delivery pump, and the input end of the delivery pump is fixedly connected to a second cooling pipe. This invention, by setting up a housing and a cooling tank on both sides of the wind turbine gearbox and fixing a heat exchanger on one side of the housing, forms a closed-loop coolant circulation, achieving rapid heat conduction and uniform heat dissipation inside the wind turbine gearbox. The coolant circulates through the first, second, and third cooling pipes and the cooling tank, carrying the gearbox heat to the cooling tank and releasing it to the outside air through the heat exchanger, effectively reducing the gearbox temperature and improving the operational stability of the equipment.

Description

Technical Field

[0001] This invention relates to the field of wind turbine generator technology, and in particular to a wind turbine generator gearbox cooling device. Background Technology

[0002] During operation, the high-speed rotation of gears and bearings inside the gearbox of existing wind turbine generators generates a large amount of heat. If the gearbox temperature is too high, it will lead to a decline in the performance of the lubricating oil and accelerated wear of gears and bearings, thereby affecting the operating efficiency and service life of the wind turbine. Currently, the commonly used gearbox cooling solutions mainly include two types: air cooling and liquid cooling. Air cooling: Cooling is achieved by heat dissipation through the surface of the gearbox or by forced air convection by an external fan. However, it is greatly affected by ambient temperature and airflow speed, and its cooling efficiency is limited, making it difficult to meet the heat dissipation requirements of high-power fans. Liquid cooling: Heat is removed by circulating coolant in the gearbox and then released to the external environment through a heat exchanger. Although it can improve cooling efficiency, existing liquid cooling systems have problems such as complex structure, uneven coolant circulation, difficult installation and maintenance, and insufficient air flow assistance from the fan. Therefore, a cooling device for the gearbox of a wind turbine generator set is proposed. Summary of the Invention

[0003] In view of this, the present invention provides a gearbox cooling device for wind turbine generator sets to solve or alleviate the technical problems existing in the prior art, and at least provides a beneficial alternative.

[0004] The technical solution of the present invention is implemented as follows: a wind turbine gearbox cooling device, comprising a wind turbine gearbox; The wind turbine gearbox has a housing and a cooling box on each side; A heat exchanger is fixedly installed on one side of the housing. One end of the heat exchanger is fixedly connected to a cooling pipe, the other end of the cooling pipe is fixedly connected to a delivery pump, the input end of the delivery pump is fixedly connected to a cooling pipe, and the other end of the cooling pipe is fixedly connected to one side of the cooling box. The other side of the cooling box is fixedly connected to the third cooling pipe, and the other end of the third cooling pipe is fixedly connected to the other side of the heat exchanger.

[0005] More preferably, the bottom of the delivery pump is fixedly connected to the top side of the cooling tank.

[0006] More preferably, the cooling pipe three extends from the top of the cooling tank into its interior to achieve the circulation and return of the coolant.

[0007] More preferably, the shell has a slotted structure on both sides, and a fan is fixedly installed on the side of the shell away from the heat exchanger to enhance air convection.

[0008] More preferably, a fan shroud is fixedly installed on the outer wall of the housing, and the drive motor of the fan is installed in the middle of the fan shroud.

[0009] The embodiments of the present invention have the following advantages due to the adoption of the above technical solutions: I. This invention establishes a closed-loop coolant circulation system by setting up a housing and a cooling box on both sides of the wind turbine gearbox, and fixing a heat exchanger on one side of the housing. This system enables rapid heat conduction and uniform heat dissipation inside the wind turbine gearbox. The coolant circulates through cooling pipes 1, 2, and 3 and the cooling box, carrying the gearbox heat to the cooling box and releasing it to the outside air through the heat exchanger. This effectively reduces the gearbox temperature and improves the stability of equipment operation. Second, the present invention also provides a fan on the side of the housing away from the heat exchanger, and works with the fan shroud to form an air convection aid. The fan enhances airflow and improves heat exchange efficiency, solving the problem of uneven circulation or insufficient heat dissipation in existing cooling systems.

[0010] The above overview is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features of the invention will become readily apparent from the accompanying drawings and the following detailed description. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in the embodiments of this application 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 application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 This is a structural diagram of the present invention from one perspective; Figure 2 This is a structural diagram from another perspective of the present invention; Figure 3 This is a structural diagram of the cooling box of the present invention.

[0013] Figure descriptions: 11. Wind turbine gearbox; 21. Housing; 22. Fan cover; 23. Cooling pipe line one; 24. Transfer pump; 25. Cooling pipe line two; 26. Cooling box; 27. Cooling pipe line three; 28. Heat exchanger; 29. ​​Fan. Detailed Implementation

[0014] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of the invention. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0015] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0016] like Figure 1-3 As shown, this embodiment of the invention provides a wind turbine gearbox cooling device, which is mainly used to reduce the temperature of the wind turbine gearbox 11 during operation and to ensure the working stability and service life of the gears and bearing components inside the wind turbine gearbox 11. It includes a wind turbine gearbox 11, a housing 21, a cooling box 26, a heat exchanger 28, cooling pipes, and a delivery pump 24; The wind turbine gearbox 11 has a housing 21 and a cooling box 26 on both sides. A heat exchanger 28 is fixedly installed on one side of the housing 21. The heat exchanger 28 is used to transfer heat from inside the wind turbine gearbox to the coolant. One end of the heat exchanger 28 is fixedly connected to a first cooling pipe 23, and the other end of the first cooling pipe 23 is fixedly connected to a delivery pump 24. The input end of the delivery pump 24 is fixedly connected to a second cooling pipe 25, and the other end of the second cooling pipe 25 is fixedly connected to one side of the cooling box 26. The other side of the cooling box 26 is fixedly connected to a third cooling pipe 27, and the other end of the third cooling pipe 27 is fixedly connected to the other side of the heat exchanger 28, forming a closed-loop cooling circuit structure. Through this cooling circuit, the heat generated inside the wind turbine gearbox can be quickly carried away by the coolant and transferred to the heat exchanger for heat dissipation, thereby reducing the temperature of the wind turbine gearbox. In this embodiment, the delivery pump 24 is fixedly installed on the top of the cooling tank 26, which facilitates the circulation of coolant from top to bottom and ensures uniform flow. The cooling pipe 27 extends from the top of the cooling tank 26 into its interior, enabling the coolant to flow back from the top of the cooling tank to the heat exchanger 28, ensuring sufficient circulation of coolant and avoiding uneven heat dissipation caused by local liquid stagnation. The housing 21 has slotted structures on both sides. A fan 29 is fixedly installed on the side of the housing away from the heat exchanger 28. The drive motor of the fan 29 is installed in the middle of the fan cover 22, which is fixedly installed on the outer wall of the housing 21. This structure drives the air to flow inside the housing through the fan, enhances air convection, and enables the heat on the surface of the wind turbine gearbox to be transferred to the coolant more effectively, thereby improving heat dissipation efficiency.

[0017] When the wind turbine gearbox 11 is in operation, its internal gears, bearings and other mechanical components generate a large amount of frictional heat and heat from mechanical energy conversion. This heat is first conducted to the housing 21 through the metal outer shell of the wind turbine gearbox 11. The housing 21 is in close contact with the heat exchanger 28 through its metal structure, so that the heat generated by the wind turbine gearbox can be quickly transferred to the heat exchanger 28, realizing concentrated heat conduction. The heat exchanger 28 has a coolant flow channel inside. When the device is started, the coolant is driven by the delivery pump 24 and enters the pump body from one end of the heat exchanger 28 along the first cooling pipe 23. After the delivery pump 24 pressurizes the coolant, it flows through the second cooling pipe 25 and enters the cooling tank 26. The coolant exchanges heat in the cooling tank 26 and flows back from the top of the cooling tank to the other side of the heat exchanger 28 through the third cooling pipe 27, realizing a closed-loop circulation. During the entire circulation process, the coolant can continuously remove the heat generated by the wind turbine gearbox 11 and circulate repeatedly between the cooling tank 26 and the heat exchanger 28, so that the temperature of the wind turbine gearbox is kept within a preset safe range. Meanwhile, a fan 29 is installed on the side of the housing 21 away from the heat exchanger 28. The fan is driven by a motor to rotate, drawing air in from outside the housing and allowing it to flow inside the housing. The shroud 22 is fixed to the outer wall of the housing 21 and covers and guides the fan 29, guiding the air to form a stable convection path. Through the cooperation of the fan 29 and the shroud 22, the air on the surface of the wind turbine gearbox and around the heat exchanger 28 is rapidly circulated. The air carries away heat and is discharged outside the housing, thereby significantly improving the heat exchange efficiency.

[0018] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various variations or substitutions within the technical scope disclosed in the present invention, and these should all be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A wind turbine gearbox cooling arrangement, characterized in that, Including wind turbine gear box (11); The wind turbine gear box (11) is provided with a shell (21) and a cooling box (26) on both sides respectively; One side of the shell (21) is fixedly provided with a heat exchanger (28), one end of the heat exchanger (28) is fixedly communicated with a cooling pipeline I (23), the other end of the cooling pipeline I (23) is fixedly connected with a delivery pump (24), the input end of the delivery pump (24) is fixedly communicated with a cooling pipeline II (25), the other end of the cooling pipeline II (25) is fixedly communicated with one side of the cooling box (26); The other side of the cooling box (26) is fixedly communicated with a cooling pipeline III (27), and the other end of the cooling pipeline III (27) is fixedly communicated with the other side of the heat exchanger (28).

2. A wind turbine gearbox cooling arrangement according to claim 1, characterised in that: The bottom of the delivery pump (24) is fixedly connected with one side of the top of the cooling box (26).

3. A wind turbine gearbox cooling arrangement according to claim 2, characterised in that: The cooling pipeline III (27) extends from the top of the cooling box (26) to the inside of the cooling box (26), so that the circulation of the cooling liquid is realized.

4. A wind turbine gearbox cooling arrangement according to claim 3, characterised in that: The both sides of the shell (21) are provided with a slot structure, and a fan (29) is fixedly installed on the side of the shell (21) away from the heat exchanger (28), so as to enhance the air convection.

5. A wind turbine gearbox cooling arrangement according to claim 4, characterised in that: A fan cover (22) is fixedly installed on the outer wall of the shell (21), and the driving motor of the fan (29) is installed in the middle of the fan cover (22).

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