Energy-saving air-water cooler for wind power generator

Abstract

The application relates to the technical field of air-water coolers, and discloses an energy-saving air-water cooler for a wind power generator, which comprises an outer shell body, a driving gear is fixedly installed on the inner wall of the outer shell body, a positioning plate is arranged in the inner cavity of the outer shell body, a cooling beam pipe is movably sleeved on the positioning plate, a driven gear is fixedly sleeved on the outer surface of the cooling beam pipe, and end cover assemblies are movably sleeved at the two ends of the outer shell body. The energy-saving air-water cooler for the wind power generator is provided with the cooling beam pipe and a linkage structure arranged on the cooling beam pipe. When the outer shell body rotates, the driving gear and the driven gear are engaged and driven, the cooling beam pipe is driven to rotate, the inward end face of the cooling beam pipe is no longer fixed, the heat transfer time of the heated end face of the cooling beam pipe and the cooling medium flowing in the inner cavity of the cooling beam pipe is increased while the temperature difference is increased and the heat transfer efficiency is improved, and the cooling and heat dissipation effect of the air-water cooler on the wind power generator is effectively maintained.

Description

Technical Field

[0001] This application relates to the field of air-water cooler technology, and more particularly to an energy-saving air-water cooler for wind turbine generators. Background Technology

[0002] Air-water coolers, as a type of efficient and closed-loop industrial cooling equipment, exchange heat between the cooling medium flowing through the cooling tubes and the hot air inside the device. This removes the heat generated during operation and reduces the internal temperature of the device. Due to the closed-loop cooling design, the internal electrical components are effectively protected from corrosion caused by the circulating air. Therefore, they are widely used in the power and motor industries, especially in wind power generation, where they provide efficient cooling and heat dissipation for wind turbines and effectively protect the internal electrical components. However, the position of the cooling tube bundle in the existing air-water cooler is relatively fixed, which means that the end face facing the heat source is fixed. Although a cooling medium flows inside the cooling tube bundle, the temperature of the inner end face will gradually increase during operation, while the temperature of the inner end face will be relatively low. In the process of heat transfer, there is a direct proportional relationship between temperature difference and heat transfer rate (the greater the temperature difference, the higher the heat transfer rate, and vice versa). Therefore, during the heat exchange process, as the temperature of the inner end face of the cooling tube bundle gradually increases, its heat transfer rate will gradually decrease, resulting in a deterioration in the cooling effect of the air-water cooler and an increase in the internal temperature of the device, posing a significant safety hazard.

[0003] Therefore, there is an urgent need for an air-water cooler to solve the defects of the existing air-water coolers in actual use. Summary of the Invention

[0004] This application proposes an energy-saving air-water cooler for wind turbine generators, which effectively maintains the heat exchange rate between the cooling tubes and the heat, resulting in better cooling performance and preventing the internal temperature of the device from rising due to a decrease in the heat transfer efficiency of the cooling tubes. This solves the problem that in existing air-water coolers, the heat transfer rate gradually decreases as the temperature of the inner end face of the cooling tubes gradually increases during heat exchange, leading to a deterioration in the cooling effect and an increase in the internal temperature of the device.

[0005] To achieve the above objectives, this application adopts the following technical solution: an energy-saving air-water cooler for a wind turbine generator, comprising an outer shell disposed around the wind turbine generator. A transmission gear, connected to the rotating main shaft of the wind turbine generator, is fixedly sleeved on one side of the outer surface of the outer shell, thereby driving the outer shell to rotate when the wind turbine generator operates. A set of drive gears is fixedly installed on the left and right sides of the inner wall of the outer shell. A set of positioning plates is provided on the left and right sides of the inner cavity of the outer shell, and several sets of gears arranged in a circular array are movably sleeved between the two sets of positioning plates. The cooling bundle tube is used for circulating cooling medium. A set of driven gears that mesh with the driving gear are fixedly sleeved on both sides of the outer surface of the cooling bundle tube. When the outer shell rotates, the meshing transmission of the driving gear and the driven gear can drive the cooling bundle tube to rotate, so that the inner end face of the cooling bundle tube is no longer fixed. While increasing the temperature difference and improving the heat transfer efficiency, it also increases the heat transfer time between the heated end face of the cooling bundle tube and the cooling medium flowing in its inner cavity, and effectively improves the cooling and heat dissipation effect of the air-water cooler on the wind turbine. The left and right ends of the outer shell are respectively movably fitted with a set of end cap assemblies. The two sets of end cap assemblies can effectively support the outer shell and its structure. The end cap assembly is provided with an inner pressure plate, and the inner pressure plate is provided with a bolt group to be fixedly connected to the positioning plate, thereby fixing the positioning plate and defining the relative position of the cooling bundle tube. A first positioning hole is provided on the inner pressure plate, and one end of the cooling bundle tube extends through the first positioning hole to the outer end of the inner pressure plate.

[0006] Furthermore, a second positioning hole is provided on the outer end of the end cap assembly, and a conduit with an end that is rotatably sealed to the end of the cooling bundle tube is fixedly installed on the second positioning hole. The other ends of the two sets of conduits form a flow loop with the cooling medium circulation pump set fixedly installed on the wind turbine frame through pipelines, and carry out the large amount of heat generated by the wind turbine during operation.

[0007] Furthermore, a set of clamps is provided on each side of the inside of the cooling bundle tube, and an elastic airbag filled with gas is fixedly installed between the two sets of clamps. When the temperature of the cooling medium flowing through the cooling bundle tube rises, the elastic airbag can be forced to expand thermally under the action of heat transfer, thereby reducing the flow gap between it and the inner wall of the cooling bundle tube. With the flow rate of the cooling medium remaining constant, the flow velocity of the cooling medium in the cooling bundle tube can be effectively increased as the flow gap decreases, and the heat it carries can be quickly carried away.

[0008] Furthermore, the outer surface of the elastic airbag is designed as a rod-shaped structure that is thin at both ends and thick in the middle, and the two ends of the elastic airbag are designed as hemispherical structures. Therefore, the design of the external shape structure of the elastic airbag can effectively reduce its resistance to the flow of cooling medium.

[0009] Furthermore, the radius of the inscribed circle formed by the outer surfaces of several sets of cooling tube bundles is smaller than the radius of the generator's outer casing, which can effectively prevent interference between the air-water cooler and the generator during operation.

[0010] Furthermore, a number of threaded holes arranged in a ring array are provided on one side of the outer surface of the end cap assembly, and the end cap assembly is fixedly installed on the frame of the wind turbine through the threaded holes.

[0011] Furthermore, an inner groove is formed on the outer surface of the cooling bundle tube along its central axis, thereby increasing the effective contact area between the cooling bundle tube and heat, and further improving the heat transfer efficiency between them.

[0012] The beneficial effects of this invention are as follows: This application provides an energy-saving air-water cooler for wind turbine generators. Regarding the cooling bundle tubes and their linkage structure, when the outer casing rotates, the meshing transmission of the driving and driven gears causes the cooling bundle tubes to rotate as well. This causes the inner end face of the cooling bundle tubes to become less fixed, increasing the temperature difference and improving heat transfer efficiency. It also increases the heat transfer time between the heated end face of the cooling bundle tubes and the cooling medium flowing within its inner cavity, effectively maintaining the cooling and heat dissipation effect of the air-water cooler on the wind turbine generator. This prevents a decrease in heat transfer efficiency due to an increase in the temperature of the heated end face of the cooling bundle tubes or a decrease in the temperature difference. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of the present invention 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 embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort: Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a front view of the structure of the present invention; Figure 3 This is a right-side view of the structure of the present invention; Figure 4 This is a schematic diagram of the outer shell of the present invention; Figure 5 This is a schematic diagram of the end cap assembly of the present invention; Figure 6The structure of this invention Figure 1 Enlarged diagram of point A in the diagram.

[0014] In the figure: 1-outer shell, 2-transmission gear, 3-drive gear, 4-positioning plate, 5-cooling bundle tube, 6-bolt group, 7-driven gear, 8-end cover assembly, 9-inner pressure plate, 10-first positioning hole, 11-second positioning hole, 12-conduit, 13-threaded hole, 14-clamping block, 15-elastic airbag. Detailed Implementation

[0015] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0016] like Figure 1 , Figure 2 As shown, an energy-saving air-water cooler for a wind turbine includes an outer casing 1 arranged around the wind turbine. A transmission gear 2, which is connected to the rotating main shaft of the wind turbine, is fixedly sleeved on one side of the outer surface of the outer casing 1. When the wind turbine operates, the outer casing 1 rotates accordingly. Figure 3 , Figure 4 As shown, a set of driving gears 3 are fixedly installed on the left and right sides of the inner wall of the outer shell 1, and a set of positioning plates 4 are provided on the left and right sides of the inner cavity of the outer shell 1. Several sets of cooling bundle tubes 5 arranged in a ring array for the flow of cooling medium are movably sleeved between the two sets of positioning plates 4. A set of driven gears 7 that mesh with the driving gears 3 are fixedly sleeved on both sides of the outer surface of the cooling bundle tubes 5. When the outer shell 1 rotates, the cooling bundle tubes 5 can be rotated under the meshing action of the driving gears 3 and the driven gears 7, so that the inner end face of the cooling bundle tubes 5 is no longer fixed. While increasing the temperature difference and improving the heat transfer efficiency, it also increases the heat transfer time between the heated end face of the cooling bundle tubes 5 and the cooling medium flowing in the inner cavity, and effectively improves the cooling and heat dissipation effect of the air-water cooler for the wind turbine. A set of end cap assemblies 8 is movably fitted onto the left and right ends of the outer shell 1, thereby providing effective support for the outer shell 1 and its structure through the arrangement of the two sets of end cap assemblies 8. Figure 5 As shown, the end cap assembly 8 has an inner pressure plate 9 inside, and the inner pressure plate 9 has a bolt group 6 fixedly connected to the positioning plate 4 to fix the positioning plate 4 and limit the relative position of the cooling bundle tube 5. A first positioning hole 10 is opened on the inner pressure plate 9, and one end of the cooling bundle tube 5 extends through the first positioning hole 10 to the outer end of the inner pressure plate 9.

[0017] like Figure 1 , Figure 5 As shown, in this technical solution, a second positioning hole 11 is provided on the outer end of the end cap assembly 8, and a conduit 12 with its end rotatably sealed to the end of the cooling bundle tube 5 is fixedly installed on the second positioning hole 11. The other ends of the two sets of conduits 12 form a flow circuit with the cooling medium circulation pump set fixedly installed on the wind turbine frame through the pipeline, and carry out the large amount of heat generated by the wind turbine during operation.

[0018] like Figure 1 , Figure 6 As shown, in this technical solution, a set of clamping blocks 14 are respectively provided on both sides inside the cooling tube 5, and an elastic airbag 15 filled with gas is fixedly installed between the two sets of clamping blocks 14. When the temperature of the cooling medium flowing through the cooling tube 5 rises, under the action of heat transfer, the elastic airbag 15 can be forced to thermally expand and reduce the flow gap between it and the inner wall of the cooling tube 5. With the cooling medium flow rate remaining unchanged, as the flow gap decreases, the flow velocity of the cooling medium in the cooling tube 5 can be effectively increased, and the heat it carries can be quickly carried away.

[0019] like Figure 5 As shown, in this technical solution, the outer surface of the elastic airbag 15 is set as a rod-shaped structure with thin ends and thick middle, and the two ends of the elastic airbag 15 are set as hemispherical structures. Therefore, the setting of the external shape structure of the elastic airbag 15 can effectively reduce its flow resistance to the cooling medium.

[0020] In this technical solution, the radius of the inscribed circle formed by the outer surfaces of several sets of cooling tube bundles 5 is smaller than the radius of the generator's outer casing, thereby effectively avoiding interference between the air-water cooler and the generator during operation.

[0021] like Figure 1 , Figure 5 As shown, in this technical solution, a number of threaded holes 13 arranged in a ring array are provided on one side of the outer surface of the end cap assembly 8, and the end cap assembly 8 is fixedly installed on the frame of the wind turbine through the threaded holes 13.

[0022] In this technical solution, an inner groove is formed on the outer surface of the cooling bundle tube 5 along its central axis, thereby increasing the effective contact area between the cooling bundle tube 5 and heat, and further improving the heat transfer efficiency between them.

[0023] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An energy-saving air-water cooler for wind turbine generators, comprising an outer casing (1), wherein a transmission gear (2) is fixedly sleeved on one side of the outer surface of the outer casing (1), characterized in that: A set of driving gears (3) are fixedly installed on the left and right sides of the inner wall of the outer shell (1). A set of positioning plates (4) are provided on the left and right sides of the inner cavity of the outer shell (1). Several sets of cooling tubes (5) are movably sleeved between the two sets of positioning plates (4). A set of driven gears (7) that mesh with the driving gears (3) are fixedly sleeved on both sides of the outer surface of the cooling tubes (5). A set of end cap assemblies (8) are movably sleeved on the left and right ends of the outer shell (1). An inner pressure plate (9) is provided inside the end cap assembly (8). A bolt group (6) is provided on the inner pressure plate (9) and fixedly connected to the positioning plate (4). A first positioning hole (10) is opened on the inner pressure plate (9). One end of the cooling tube (5) extends through the first positioning hole (10) to the outer end of the inner pressure plate (9). The cooling tube (5) has a set of clamps (14) on both sides inside, and an elastic airbag (15) filled with gas is fixedly installed between the two sets of clamps (14). The outer surface of the elastic airbag (15) is a rod-shaped structure with thin ends and thick middle, and the two ends of the elastic airbag (15) are hemispherical. The radius of the inscribed circle formed by the outer surfaces of several sets of cooling tubes (5) is smaller than the radius of the generator outer casing.

2. The energy-saving air-water cooler for wind turbine generators according to claim 1, characterized in that, The outer end of the end cap assembly (8) is provided with a second positioning hole (11), and a conduit (12) with its end rotatably sealed to the end of the cooling bundle tube (5) is fixedly installed on the second positioning hole (11). The other ends of the two sets of conduits (12) form a flow circuit with the cooling medium circulation pump group through the pipeline.

3. The energy-saving air-water cooler for wind turbine generators according to claim 1, characterized in that, A threaded hole (13) is provided on one side of the outer surface of the end cap assembly (8), and the end cap assembly (8) is fixedly installed on the frame of the wind turbine through the threaded hole (13).

4. The energy-saving air-water cooler for wind turbine generators according to claim 3, characterized in that, An inner groove is formed on the outer surface of the cooling tube (5) along its central axis.

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