CN116906288A - Cooling system of wind turbine tower - Google Patents

Abstract

The invention discloses a heat dissipation system for a wind turbine tower, which includes: a tower bottom platform, a tower door structure, a first axial flow fan, a second axial flow fan and a heat dissipation pipe assembly. The platform at the bottom of the tower divides the tower section where it is located into the space above the platform and the space below the platform. The bottom platform of the tower is equipped with pipe through holes; the tower door structure includes a door panel and a fixed plate, and the door panel is provided with a space connected to the space above the platform. The air inlet and fixed plate are provided with an air outlet connected to the space below the platform; the upstream axial flow fan is located in the space above the platform; the downstream axial flow fan is located in the space below the platform; the heat dissipation duct assembly includes an outer duct located outside the tower and an outer duct located inside the tower. And pass through the inner pipe of the tower bottom platform through the pipe through hole. One end of the inner pipe is connected to the exhaust port of the upstream axial flow fan, and the other end is connected to the air suction port of the downstream axial flow fan. The heat dissipation system of the present invention accelerates the heat dissipation speed in the tower by arranging multiple axial flow fans in series.

Description

Cooling system of wind turbine tower

Technical field

The present invention relates to the technical field of wind power generation, and specifically to a heat dissipation system for a wind turbine tower.

Background technique

With the rise of high-power wind turbines, tower heights are getting higher and higher, and concrete towers have emerged. However, the heat dissipation performance of the concrete cylinder is far lower than that of the steel tower cylinder, and the bottom of the tower is placed Heating electrical equipment such as converters, auxiliary transformers, tower base control cabinets, and even box-type transformers. If the heat generated by these heating electrical equipment cannot be discharged out of the cylinder in time, the heat will accumulate in the relatively closed tower, thus causing It affects the normal operation of these electrical equipment and even the entire unit, so it is very necessary to design a tower cooling system that can dissipate heat quickly and efficiently.

Contents of the invention

This summary introduces a series of concepts in a simplified form that are further described in detail in the detailed description. The summary of the present invention is not intended to limit the key features and necessary technical features of the claimed technical solution, nor is it intended to determine the protection scope of the claimed technical solution.

In order to at least partially solve the above problems, according to a first aspect of the present invention, a heat dissipation system for a wind turbine tower is provided. Electrical equipment is installed at the bottom of the tower. The heat dissipation system includes:

The tower bottom platform is sealed and connected with the tower wall, thereby dividing the tower section where it is located into the space above the platform and the space below the platform. The electrical equipment is installed on the tower bottom platform and Located in the space above the platform, the bottom platform of the tower is provided with pipe through holes near the installation position of the electrical equipment;

Tower door structure, the tower door structure includes a door panel and a fixed plate located below the door panel, the door panel is provided with an air inlet connected to the space above the platform, and the fixed plate is provided with an air inlet connected to the space below the platform Space-connected air outlets;

An upstream axial flow fan installed in the space above the platform at a position close to the exhaust outlet of the electrical equipment;

A downstream axial flow fan, which is installed on the fixed plate and located in the space below the platform, so that the downstream axial flow fan is coaxial with the air outlet of the fixed plate;

The heat dissipation duct assembly includes an outer duct located outside the tower and one end connected to the air outlet of the fixed plate, and an outer duct located inside the tower and passing through the tower bottom platform through the duct through hole. An inner pipe, one end of the inner pipe is connected to the exhaust port of the upstream axial flow fan, and the other end is connected to the air suction port of the downstream axial flow fan.

Further, a plurality of electrical equipment and a plurality of upstream axial flow fans corresponding to each electrical equipment are installed in the space above the platform, and the inner duct includes an exhaust port extending from the exhaust port of each upstream axial flow fan through the The pipes pass through the holes and merge into multiple branch pipes in the space below the platform.

Further, the plurality of electrical equipment includes first electrical equipment and second electrical equipment respectively located on the left and right sides of the tower door structure.

Further, the width of the first electrical equipment is greater than the radius of the tower, the width direction of the first electrical equipment is perpendicular to the door panel in the closed state, and the first upstream side corresponding to the first electrical equipment is The axial flow fan is arranged on the back side of the first electrical equipment, the central axis of the first upstream axial flow fan is parallel to the width direction of the first electrical equipment, and the exhaust port of the first upstream axial flow fan Towards the side of the tower door structure, the front panel of the first electrical equipment is provided with an air inlet grille.

Further, the side panel of the converter facing the tower door structure is provided with an air intake grille.

Further, the width of the second electrical equipment is less than half the width of the first electrical equipment, and the front panel of the second electrical equipment faces the side of the tower door structure and is provided with an air intake grille, and The second upstream axial flow fan corresponding to the second electrical equipment is disposed on the back side of the second electrical equipment, the central axis of the second upstream axial flow fan is parallel to the width direction of the second electrical equipment and the The air suction port of the second upstream axial flow fan faces the side away from the first electrical equipment.

Further, the portion of the inner pipe located below the tower bottom platform is spaced a certain distance from the tower bottom platform.

Further, the outer duct includes a first section extending in a horizontal direction from the air outlet and a second section extending obliquely downward from an end of the first section away from the tower wall.

Further, the inclination angle of the second section relative to the first section is 45° to 55°.

Further, the tower door structure also includes a door frame, the outer side wall of the door frame is fixedly connected to the tower wall, the tower door and the fixed plate are connected to the inner side wall of the door frame, so that the tower Both the door and the fixed plate are located in the door frame.

The heat dissipation system of the wind turbine tower of the present invention realizes the series arrangement of multiple axial flow fans by setting axial flow fans at both ends of the internal pipe of the tower, thereby speeding up the discharge of hot air generated by the heating electrical equipment from the tower. Furthermore, as the negative pressure inside the tower increases, the cold air outside the tower flows into the tower faster, thereby improving the cooling effect of the electrical equipment in the tower. By setting up a tower bottom platform with pipe through holes and sealing connection with the tower wall, and making the tower air inlet and air outlet connected to the space above the platform and the space below the platform respectively, most of the heat dissipation pipes in the tower are located on the platform space below, thereby effectively reducing the temperature of the space above the platform where the electrical equipment is located.

Description of the drawings

The following drawings of the present invention are hereby incorporated as a part for the understanding of the present invention. The drawings illustrate embodiments of the invention and their descriptions to explain the apparatus and principles of the invention. In the attached picture,

Figure 1 is a schematic structural diagram of the heat dissipation system of the wind turbine tower according to the embodiment of the present invention;

Figure 2 is a schematic top view of the heat dissipation system of the wind turbine tower according to the embodiment of the present invention;

Figure 3 is a schematic front view of the heat dissipation system of the wind turbine tower according to the embodiment of the present invention.

Detailed ways

In the following description, numerous specific details are given in order to provide a more thorough understanding of the invention. However, it will be apparent to one skilled in the art that the present invention may be practiced without one or more of these details. In other examples, some technical features that are well known in the art are not described in order to avoid confusion with the present invention.

In order to fully understand the present invention, detailed structures will be set forth in the following description to explain the present invention. It will be apparent that the practice of the invention is not limited to the specific details familiar to those skilled in the art. The preferred embodiments of the present invention are described in detail below. However, in addition to these detailed descriptions, the present invention may also have other embodiments and should not be construed as being limited to the embodiments proposed here.

It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention, and the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless The context clearly indicates otherwise. When the terms "comprises" and/or "includes" are used in this specification, they indicate the presence of the stated features, integers, steps, operations, elements and/or components, but do not exclude the presence or addition of one or more other features, Integers, steps, operations, elements, components and/or combinations thereof. The terms "upper", "lower", "front", "back", "left", "right" and similar expressions used in the present invention are for illustrative purposes only and are not limiting.

Ordinal words such as "first" and "second" cited in the present invention are merely identifiers and do not have any other meaning, such as a specific order, etc. Furthermore, for example, the term "first component" does not by itself imply the presence of a "second component" and the term "second component" does not by itself imply the presence of a "first component".

Hereinafter, specific embodiments of the present invention will be described in more detail with reference to the accompanying drawings, which illustrate representative embodiments of the present invention and do not limit the present invention.

The invention provides a heat dissipation system for a wind turbine tower. The wind turbine tower is a concrete tower with multiple heating electrical devices installed at the bottom. According to the preferred embodiment of the present invention, as shown in Figures 1-3, a first electrical device 1 and a second electrical device 2 are installed at the bottom of the tower. The first electrical device 1 can be a converter, and the second electrical device 2 can be It is the transformer or tower base control cabinet. The heat dissipation system includes a tower bottom platform 3, a tower door structure 4, a first upstream axial flow fan 5, a second upstream axial flow fan 6, a downstream axial flow fan 7 and a heat dissipation pipe assembly. Among them, the tower bottom platform 3 is sealingly connected to the tower wall, thereby dividing the tower section where it is located into a space above the platform and a space below the platform. The first electrical equipment 1 and the second electrical equipment 2 are installed on the tower bottom platform 3 and located in the space above the platform. The tower bottom platform 3 is provided with pipe through holes near the installation positions of the first electrical equipment 1 and the second electrical equipment 2 respectively. The tower door structure 4 includes a door panel 41 and a fixing plate 42 located below the door panel 41 . The door panel 41 is provided with an air inlet connected to the space above the platform. The air inlet may include two louvers 411 and 412 located above and below the handle and door lock respectively. Preferably, filter cotton is provided on the inside of the louvers 411 and 412 respectively. The fixed plate 42 is provided with an air outlet 421 connected with the space below the platform. The first upstream axial flow fan 5 and the second upstream axial flow fan 6 are respectively installed in the space above the platform at positions close to the respective exhaust outlets of the first electrical equipment 1 and the second electrical equipment 2 . The downstream axial flow fan 7 is installed on the fixed plate 42 and is located in the space below the platform, so that the downstream axial flow fan 7 is coaxial with the air outlet 421 of the fixed plate 42. Specifically, the fixed plate 42 is provided with a circle of connections around the air outlet 421. hole, the downstream axial flow fan 7 is flange-connected to the fixed plate 42 through the exhaust port, so that the hot air discharged from the exhaust port of the downstream axial flow fan 7 is discharged to the outside of the tower through the air outlet 421 of the fixed plate 42 . The heat dissipation pipe assembly includes an outer pipe 8 located outside the tower and one end connected to the air outlet 421 of the fixed plate 42 and an inner pipe 9 located inside the tower and passing through the tower bottom platform 3 through the above-mentioned pipe through hole. The inner pipe 9 enters The air end is connected to the air exhaust port 52 of the first upstream axial flow fan 5 and the air exhaust port 62 of the second upstream axial flow fan 6 respectively, and the air outlet end is connected to the air suction port of the downstream axial flow fan 7 . The inner duct 9 includes a first branch pipe 91 extending from the exhaust port 52 of the first upstream axial flow fan 5 and the exhaust port 62 of the second upstream axial flow fan 6 through the respective duct through holes and converging in the space below the platform. and second branch 92. Preferably, both the outer pipe 8 and the inner pipe 9 are made of steel pipes.

The heat dissipation system of the wind turbine tower of the present invention realizes the series arrangement of multiple axial flow fans by setting axial flow fans at both ends of the internal pipe of the tower, thereby speeding up the discharge of hot air generated by the heating electrical equipment from the tower. Furthermore, as the negative pressure inside the tower increases, the cold air outside the tower flows into the tower faster, thereby improving the cooling effect of the electrical equipment in the tower. The hot air discharged from the electrical equipment is directly inhaled into the pipe through the upstream axial flow fan, forming an independent hot air discharge path; and by setting up a tower bottom platform with pipe through holes and sealing connection with the tower wall, and making the tower air inlet and The air outlet is connected to the space above the platform and the space below the platform respectively, so that most of the heat dissipation ducts in the tower are located in the space below the platform, thereby effectively reducing the temperature of the space above the platform where the electrical equipment is located. Further, by dividing the tower door panel structure into a switch part and a fixed part and providing air inlets and air outlets in the two parts respectively, a complete air circulation path is achieved without having to open an air inlet or air outlet on the tower wall. Thereby simplifying the manufacturing process and reducing production costs.

According to the embodiment of the present invention, as shown in Figure 2, the first electrical equipment 1 and the second electrical equipment 2 are respectively located on the left and right sides of the tower door structure 4, so that between the first electrical equipment 1 and the second electrical equipment 2 The area between them forms an air inlet channel, and the cold air entering the tower through the air inlet of the door panel 41 can smoothly flow to the first electrical equipment 1 and the second electrical equipment 2 to fully cool them. According to the embodiment of the present invention, the cabinet of the first electrical equipment 1 is constructed into a cube structure with wider front and back panels and narrower side panels that is conducive to heat dissipation; and is arranged in the tower to form a cabinet of the first electrical equipment 1 The width direction is perpendicular to the door panel 41 in the closed state. The front panel of the casing of the first electrical equipment 1 is provided with an air inlet grille, and the back panel of the casing is provided with an air outlet. An exhaust fan can be built into the air outlet. Correspondingly, the first upstream axial flow fan 5 is located at the first On the back side of the electrical equipment 1 , the central axis of the first upstream axial flow fan 5 is parallel to the width direction of the first electrical equipment 1 and the suction port 51 of the first upstream axial flow fan 5 faces opposite to the side of the tower door structure 4 One side to avoid direct inhalation of cold air without heat exchange into the tower through the air inlet of the door panel 41 into the heat dissipation duct; the front panel of the first electrical equipment 1 with the air inlet grille is close to the tower entering through the door panel 41 The cold air flow area in the cylinder and the width direction of the front panel are consistent with the main flow direction of the cold air, thereby ensuring that sufficient cold air enters the inside of the first electrical equipment 1 through the air inlet grille of the front panel. Preferably, the width of the first electrical device 1 is greater than the radius of the tower. Further preferably, the side panel of the first electrical equipment 1 facing the tower door structure 4 is also provided with an air inlet grille, so that more cold air can enter the inside of the first electrical equipment 1 . As the hot air is discharged from the tower, a negative pressure is formed in the tower, and the cold air enters the interior of the tower through the shutters of the door panel 41, thereby achieving the purpose of cooling down the heating electrical equipment.

According to the embodiment of the present invention, the width of the second electrical equipment 2 is less than half the width of the first electrical equipment 1 , and the front panel of the housing of the second electrical equipment 2 faces the side of the tower door structure 4 and is provided with an air inlet grille. The exhaust outlet of the second electrical equipment 2 is arranged on the side of the back panel of the housing away from the first electrical equipment 1. Correspondingly, the second upstream axial flow fan 6 is arranged on the back side of the second electrical equipment 2 and The suction port 61 of the second upstream axial flow fan 6 faces the side away from the first electrical equipment 1 . Arranging the second electrical equipment 2 with a relatively small width such that the front panel provided with the air intake grille faces the air inlet of the door panel 41 is beneficial to sucking in sufficient cold air to improve the heat dissipation effect.

According to the embodiment of the present invention, as shown in Figures 1 and 2, most of the inner pipe 9 is located in the space below the platform, thereby minimizing the temperature impact of the heat dissipation pipe assembly on the space above the platform. Preferably, the portion of the first branch pipe 91 and the second branch pipe 92 located in the space above the platform does not exceed 1/4 of the portion located in the space below the platform. Furthermore, the portion of the inner pipe 9 located below the tower bottom platform 3 is spaced a certain distance away from the tower bottom platform 3 to further reduce the impact of the heat dissipation of the inner pipe 9 on the temperature of the space above the platform.

According to the embodiment of the present invention, as shown in FIG. 1 , the outer duct 8 includes a first section 81 extending in the horizontal direction from the air outlet 421 of the fixed plate 42 and an end inclined from the first section 81 away from the tower wall. A second section 82 extending downwardly. The first section 81 extends a certain distance in the horizontal direction and the second section extends a certain distance in an oblique downward direction, so that the discharge opening 83 of the outer duct 8 is spaced apart from the air inlet on the door panel 41 in both the horizontal direction and the vertical direction. Sufficient distance to prevent the hot air discharged from the outer duct 8 from being sucked into the space above the platform in the tower through the air inlet on the door panel. In addition, the second section 82 extending obliquely downward can also prevent water from the external environment from entering the tower. Preferably, the inclination angle of the second section 82 relative to the first section 81 is 45° to 55°.

According to the embodiment of the present invention, as shown in Figures 1 and 3, the tower door structure 4 also includes a door frame 43, the outer side wall of the door frame 43 is fixedly connected to the tower wall. The fixing plate 42 is fixedly connected to the inner side wall of the door frame 43 , for example, by welding. In addition, the door frame 43 is provided with an inwardly protruding stopper in the area of the door panel 41 for abutting the door panel 41 when it reaches the closed position. The door panel 41 is pivotably connected to the door frame 43 . Preferably, the second section 82 of the outer pipe 8 extends beyond the lowermost end of the door frame 33 along the tower axis direction, so that the discharge port 83 of the outer pipe 8 is spaced sufficiently apart from the shutter 412 on the door panel 41 .

Unless otherwise defined, technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention relates. The terminology used herein is for the purpose of describing specific implementations only and is not intended to limit the invention. Terms such as "part" and "piece" appearing in this article can represent either a single part or a combination of multiple parts. Terms such as "mounted" and "set up" used herein may mean that one component is directly attached to another component or that one component is attached to another component through intermediaries. Features described herein in one embodiment may be applied to another embodiment, alone or in combination with other features, unless the feature is inapplicable in that other embodiment or otherwise stated.

The present invention has been described through the above-mentioned embodiments, but it should be understood that the above-mentioned embodiments are only for the purpose of illustration and illustration, and are not intended to limit the present invention to the scope of the described embodiments. In addition, those skilled in the art can understand that the present invention is not limited to the above-described embodiments, and more variations and modifications can be made according to the teachings of the present invention. These variations and modifications all fall within the scope of the protection claimed by the present invention. within range. The protection scope of the present invention is defined by the appended claims and their equivalent scope.

Claims (10)

1. A heat dissipation system for a wind turbine tower. Electrical equipment is installed at the bottom of the tower. It is characterized in that the heat dissipation system includes: The tower bottom platform is sealed and connected with the tower wall, thereby dividing the tower section where it is located into the space above the platform and the space below the platform. The electrical equipment is installed on the tower bottom platform and Located in the space above the platform, the bottom platform of the tower is provided with pipe through holes near the installation position of the electrical equipment; Tower door structure, the tower door structure includes a door panel and a fixed plate located below the door panel, the door panel is provided with an air inlet connected to the space above the platform, and the fixed plate is provided with an air inlet connected to the space below the platform Space-connected air outlets; An upstream axial flow fan installed in the space above the platform at a position close to the exhaust outlet of the electrical equipment; A downstream axial flow fan, which is installed on the fixed plate and located in the space below the platform, so that the downstream axial flow fan is coaxial with the air outlet of the fixed plate; The heat dissipation duct assembly includes an outer duct located outside the tower and one end connected to the air outlet of the fixed plate, and an outer duct located inside the tower and passing through the tower bottom platform through the duct through hole. An inner pipe, one end of the inner pipe is connected to the exhaust port of the upstream axial flow fan, and the other end is connected to the air suction port of the downstream axial flow fan. 2. The heat dissipation system according to claim 1, characterized in that, a plurality of electrical equipment and a plurality of upstream axial flow fans corresponding to each electrical equipment are installed in the space above the platform, and the inner duct includes a pipe from each electrical equipment. The exhaust outlet of the upstream axial flow fan extends through the pipe through holes and merges into multiple branch pipes in the space below the platform. 3. The heat dissipation system according to claim 2, wherein the plurality of electrical devices include a first electrical device and a second electrical device respectively located on the left and right sides of the tower door structure. 4. The heat dissipation system according to claim 3, wherein the width of the first electrical device is greater than the radius of the tower, and the width direction of the first electrical device is perpendicular to the door panel in the closed state. , the first upstream axial flow fan corresponding to the first electrical equipment is arranged on the back side of the first electrical equipment, and the central axis of the first upstream axial flow fan is parallel to the width direction of the first electrical equipment Moreover, the exhaust outlet of the first upstream axial flow fan faces the side of the tower door structure, and the front panel of the first electrical equipment is provided with an air inlet grille. 5. The heat dissipation system according to claim 4, wherein the side panel of the converter facing the tower door structure is provided with an air inlet grille. 6. The heat dissipation system according to claim 3, wherein the width of the second electrical device is less than half of the width of the first electrical device, and the front panel of the second electrical device faces the tower. An air inlet grille is provided on one side of the door structure. A second upstream axial flow fan corresponding to the second electrical equipment is provided on the back side of the second electrical equipment. The central axis of the second upstream axial flow fan The suction port of the second upstream axial flow fan is parallel to the width direction of the second electrical equipment and faces away from the first electrical equipment. 7. The heat dissipation system according to claim 1, wherein the portion of the inner pipe located below the tower bottom platform is spaced a certain distance from the tower bottom platform. 8. The heat dissipation system according to claim 1, wherein the outer duct includes a first section extending in a horizontal direction from the air outlet and an end of the first section away from the tower wall. A second section extending obliquely downward. 9. The heat dissipation system according to claim 8, wherein the inclination angle of the second section relative to the first section is 45° to 55°. 10. The heat dissipation system according to any one of claims 1 to 9, wherein the tower door structure further includes a door frame, the outer side wall of the door frame is fixedly connected to the tower wall, and the tower door and The fixing plate is connected to the inner side wall of the door frame so that both the tower door and the fixing plate are located in the door frame.