Motor heat dissipation structure of wind power generator

Abstract

The utility model relates to a motor heat dissipation structure of wind driven generator, including cylindrical shell and installation platform, is equipped with the heat dissipation frame on the installation platform, and the both sides of cylindrical shell outside are equipped with the air inlet, and the air inlet is passed through the pipeline intercommunication with heat dissipation frame, and the generator is installed in the heat dissipation frame inboard, and is equipped with the mounting seat between cylindrical shell and air inlet, and the one side of mounting seat is the arc surface and is connected with cylindrical shell outer wall, and the other side of mounting seat is the flat surface for installing air inlet, the utility model has the advantages of the quick discharge generator outer periphery hot air, avoids the heat accumulation and forms the high temperature stagnation area.

Description

Technical Field

[0001] This utility model belongs to the field of wind turbine technology, and in particular relates to a motor heat dissipation structure for a wind turbine. Background Technology

[0002] As the single-unit capacity of wind turbines continues to increase, the heat generated by the motor operation is increasing dramatically, posing a severe challenge to traditional heat dissipation methods. The current mainstream heat dissipation solution is a combination of oil cooling fans and motor cooling exhaust ports, which can only dissipate heat inside the generator and gearbox. It cannot solve the problem of hot air generated around the generator being difficult to expel from the nacelle. Relying on natural convection or simple air ducts for heat dissipation results in chaotic airflow organization and severe mixing of hot and cold air, leading to heat accumulation in the high-temperature areas of the generator. Directional forced heat exchange cannot be achieved, forming high-temperature stagnation zones that continuously bake the generator coils and bearings, accelerating insulation aging and mechanical wear. Summary of the Invention

[0003] This utility model addresses the deficiencies in the existing technology by providing a motor heat dissipation structure for a wind turbine generator, solving the problems of difficulty in expelling hot air from the generator's periphery, chaotic airflow organization within the nacelle leading to severe mixing of hot and cold air, and heat accumulation in the generator's high-temperature areas, forming high-temperature stagnation zones.

[0004] This utility model achieves the above-mentioned objectives through the following technical solution: it includes a cylindrical outer shell and an installation platform, the installation platform is provided with a heat dissipation frame, the outer sides of the cylindrical outer shell are provided with air intake ducts, the air intake ducts are connected to the heat dissipation frame through pipes, and the generator is installed inside the heat dissipation frame.

[0005] Furthermore, through the coordinated design of the independent heat dissipation frame and the external air intake, the cold air outside the wind turbine is introduced into the heat dissipation area through a specific air duct, which forces heat exchange with the hot air around the generator body, significantly improving heat dissipation efficiency. At the same time, it avoids the accumulation of hot air in the nacelle. As the best option, the heat dissipation frame is made of a material that can conduct heat quickly.

[0006] Furthermore, a mounting base is provided between the cylindrical outer shell and the air intake duct. One side of the mounting base is an arc-shaped surface and is connected to the outer wall of the cylindrical outer shell, while the other side of the mounting base is a flat surface for mounting the air intake duct.

[0007] Furthermore, the mounting base adopts an arc-shaped surface that fits the curved surface of the cylindrical shell to ensure airtightness and structural stability. The flat surface provides a standardized installation interface for the air intake, simplifying the assembly process and adapting to different specifications of air intakes. At the same time, the mounting base also has a reserved through-type pipe installation path for installing the connecting pipe between the air intake and the heat dissipation frame.

[0008] Furthermore, the heat dissipation frame includes a semi-enclosed cooling box, one end of which is open, and a hollow area is provided inside the semi-enclosed cooling box. A flange is installed on the outer wall of the other end of the semi-enclosed cooling box, and the flange communicates with the hollow area.

[0009] Furthermore, the open end of the semi-enclosed cooling compartment allows the generator body to be connected to the gearbox, while preventing the generator from directly contacting the low-temperature airflow, which could cause the body temperature to drop below the safe value, resulting in parts shrinkage and affecting the lifespan of the machine. The hollow area forms a centralized air duct, and the flange is used to connect external pipes, efficiently exporting airflow from the hollow area and realizing the modular integration of the heat exchange channel.

[0010] Furthermore, the top and sides of the semi-enclosed cooling box are provided with several cylindrical air ducts, which are installed inside the hollow area, and both ends of the cylindrical air ducts are connected to the inner and outer walls of the semi-enclosed cooling box.

[0011] Furthermore, the cylindrical air duct runs through the cooling box, forming a multi-path flow structure, which allows the hot air on the outer surface of the generator to exchange heat evenly with the cold air in the hollow area, while increasing the heat dissipation contact area and improving heat exchange efficiency.

[0012] Furthermore, the air intake is a bucket-shaped structure with one end open, and the outermost layer of the air intake gradually narrows from the open end to the closed end, with the opening direction of the air intake facing the blade.

[0013] Furthermore, the design of the opening facing the blades maximizes the capture of natural wind energy and reduces additional energy consumption. The bucket-shaped structure can utilize the Bernoulli effect to pressurize the high-speed airflow generated by the blade rotation and guide it into the duct to enhance the air intake volume. As the optimal choice, the shape of the air intake is referenced from the air intake design of the Phantom series fighter jets.

[0014] Furthermore, the flange is connected to the exhaust port of the wind turbine's motor for heat dissipation via a pipe.

[0015] Furthermore, this connection forms a closed airflow circulation system, where hot air is discharged outside the cabin through the exhaust port to avoid heat backflow, while maintaining a negative pressure environment inside the cabin and continuously drawing in cold external air to achieve dynamic thermal balance.

[0016] Beneficial effects: Compared with the prior art, this utility model has the following advantages: 1. In this utility model, the airflow generated by the rotation of the blades and the natural wind pressure are used. The aerospace-grade aerodynamic shape of the air intake converts natural wind energy into pressurized airflow, completely replacing the traditional fan and achieving zero parasitic energy consumption. The cold air reaches the hollow area of ​​the heat dissipation frame through the pipe to form a concentrated air duct. The cylindrical air duct runs through the inner wall of the cooling box to divert the hot air around the generator to multiple independent channels, and evenly exchange heat with the cold air in the hollow area, achieving directional forced heat exchange. 2. In this utility model, hot air is led out through the flange to the exhaust port outside the engine compartment, forming a negative pressure environment to continuously draw in cold air, completely eliminating heat backflow and heat retention inside the compartment. The transparent end of the cooling box avoids direct contact between the generator and the low-temperature airflow, preventing the engine body from being damaged by excessive cooling and contraction, while ensuring a non-interference connection with the gearbox. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a partial structural diagram of the present invention; Figure 3 This is an exploded view of the heat dissipation frame structure of this utility model.

[0018] In the diagram: 1-Cylindrical outer shell, 2-Heat dissipation frame, 3-Air intake duct; 11-Installation platform, 12-Mounting base, 21-Semi-enclosed cooling box, 22-Flange, 23-Cylindrical duct. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0020] Combination Figures 1 to 3 As shown, a motor heat dissipation structure for a wind turbine includes a cylindrical outer shell 1 and a mounting platform 11. A heat dissipation frame 2 is provided on the mounting platform 11. Air inlets 3 are provided on both sides of the outer shell 1. The air inlets 3 are connected to the heat dissipation frame 2 through pipes. The generator is installed inside the heat dissipation frame 2.

[0021] Among them, through the coordinated design of the independent heat dissipation frame 2 and the external air intake duct 3, the cold air outside the wind turbine is introduced into the heat dissipation area through a specific air duct, and the hot air around the generator body is forced to exchange heat, which significantly improves the heat dissipation efficiency and avoids the accumulation of hot air in the nacelle. As the best option, the heat dissipation frame 2 is made of a material that can conduct heat quickly.

[0022] A mounting base 12 is provided between the cylindrical outer shell 1 and the air intake 3. One side of the mounting base 12 is an arc-shaped surface and is connected to the outer wall of the cylindrical outer shell 1. The other side of the mounting base 12 is a flat surface for mounting the air intake 3.

[0023] Mounting base 12 adopts an arc-shaped surface to fit the curved surface structure of cylindrical shell 1, ensuring airtightness and structural stability. The flat surface provides a standardized installation interface for air intake duct 3, simplifying the assembly process and adapting to different specifications of air intake ducts. At the same time, mounting base 12 also has a reserved through-type pipe installation path for installing the connecting pipe between air intake duct 3 and heat dissipation frame 2.

[0024] The heat dissipation frame 2 includes a semi-enclosed cooling box 21. One end of the semi-enclosed cooling box 21 is open, and a hollow area is provided inside the semi-enclosed cooling box 21. A flange 22 is installed on the outer wall of the other end of the semi-enclosed cooling box 21, and the flange 22 is connected to the hollow area.

[0025] The open end of the semi-enclosed cooling box 21 allows the generator body to be connected to the gearbox, while avoiding direct contact between the generator and the low-temperature airflow, which would cause the body temperature to drop below the safe value, resulting in parts shrinkage and affecting the life of the body. The hollow area forms a centralized air duct, and the flange 22 is used to connect external pipes to efficiently exhaust the airflow from the hollow area, realizing the modular integration of the heat exchange channel.

[0026] The top and sides of the semi-enclosed cooling box 21 are provided with several cylindrical air ducts 23. The cylindrical air ducts 23 are installed inside the hollow area, and both ends of the cylindrical air ducts 23 are connected to the inner and outer walls of the semi-enclosed cooling box 21.

[0027] The cylindrical air duct 23 runs through the cooling box 21, forming a multi-path flow structure, which allows the hot air on the outer surface of the generator to exchange heat evenly with the cold air in the hollow area, while increasing the heat dissipation contact area and improving the heat exchange efficiency.

[0028] The air intake duct 3 is a bucket-shaped structure with one end open. The outermost layer of the air intake duct 3 gradually narrows from the open end to the closed end, and the opening direction of the air intake duct 3 is towards the blade.

[0029] The design of the opening facing the blades maximizes the capture of natural wind energy and reduces additional energy consumption. The bucket-shaped structure can utilize the Bernoulli effect to pressurize the high-speed airflow generated by the blade rotation and guide it into the duct to enhance the air intake volume. As the optimal choice, the shape of the air intake duct 3 is inspired by the air intake design of the Phantom series fighter jets.

[0030] Flange 22 is connected to the motor cooling exhaust port of the wind turbine generator through a pipe.

[0031] This connection forms a closed airflow circulation system, where hot air is exhausted outside the cabin through the exhaust port to avoid heat backflow, while maintaining a negative pressure environment inside the cabin and continuously drawing in cold outside air to achieve dynamic thermal balance.

[0032] Working principle: During the operation of this utility model, when the wind turbine is running, the airflow generated by the rotation of the blades and the natural airflow are captured by the bucket-shaped air intake duct 3. The design of its opening facing the blades, combined with the Bernoulli effect, achieves airflow pressurization and enhances the intake volume. The cold air is transported to the heat dissipation frame 2 through the air intake duct 3 and the pipeline. The heat dissipation frame 2 includes a semi-enclosed cooling box 21, and its hollow area forms a concentrated air duct. Here, the cold air undergoes forced heat exchange with the hot air around the generator body. After the cold air enters the hollow area of ​​the cooling box 21, the hot air on the surface of the generator passes through multiple cylindrical air ducts 23 and is thus split. The cold air and the hot air exchange heat evenly and efficiently through the cooling box 21 with good thermal conductivity. After heat exchange, the hot air is discharged through the flange 22 at the end of the cooling compartment 21 and connected to the motor heat dissipation exhaust port through the pipeline, forming a closed airflow circulation system. The hot air is discharged outside the cabin to avoid heat backflow, while maintaining a negative pressure environment inside the cabin and continuously drawing in external cold air. The entire system works in conjunction with the independent heat dissipation frame 2 and the air intake duct 3 to achieve directional forced convection of hot and cold air, which significantly improves heat dissipation efficiency and prevents heat accumulation inside the cabin.

[0033] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0034] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A motor heat dissipation structure for a wind turbine generator, comprising a cylindrical outer shell (1) and a mounting platform (11), characterized in that: The installation platform (11) is provided with a heat dissipation frame (2), and the cylindrical shell (1) is provided with air intake ducts (3) on both sides of the outside. The air intake ducts (3) are connected to the heat dissipation frame (2) through pipes, and the generator is installed inside the heat dissipation frame (2). A mounting base (12) is provided between the cylindrical outer shell (1) and the air intake (3). One side of the mounting base (12) is an arc-shaped surface and is connected to the outer wall of the cylindrical outer shell (1). The other side of the mounting base (12) is a flat surface for mounting the air intake (3). The heat dissipation frame (2) includes a semi-enclosed cooling box (21), one end of which is open, and a hollow area is provided inside the semi-enclosed cooling box (21). A flange (22) is installed on the outer wall of the other end of the semi-enclosed cooling box (21), and the flange (22) is connected to the hollow area. The top and sides of the semi-enclosed cooling box (21) are provided with several cylindrical air ducts (23). The cylindrical air ducts (23) are installed inside the hollow area, and the two ends of the cylindrical air ducts (23) are connected to the inner and outer walls of the semi-enclosed cooling box (21).

2. The motor heat dissipation structure of a wind turbine generator according to claim 1, characterized in that: The air intake (3) is a bucket-shaped structure with one end open. The outermost layer of the air intake (3) gradually narrows from the open end to the closed end, and the opening direction of the air intake (3) is towards the blade.

3. The motor heat dissipation structure of a wind turbine generator according to claim 1, characterized in that: The flange (22) is connected to the motor cooling exhaust port of the wind turbine generator through a pipe.

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