Heat dissipation device for wind generating set

Abstract

The invention relates to the technical field of wind power generation, in particular to a heat dissipation device for a wind generating set, which comprises a first fan box, a first fan is rotatably erected in the middle of the first fan box, cooling boxes are fixedly mounted on the left side and the right side of the first fan box, and cooling air ducts are mounted in the cooling boxes; a cooling water channel is installed in the cooling air channel, the water inlet end and the water outlet end of the cooling water channel are attached to the cooling air channel, and a water inlet pipe and a water outlet pipe are fixedly installed at the water inlet end and the water outlet end of the cooling water channel correspondingly; and the water inlet pipe and the water outlet pipe are connected with a water storage tank, so that the problem that in the prior art, when the external air temperature in the desert is high, heat dissipation cannot be well conducted on the wind power generator cabin can be effectively solved.

Description

Technical Field

[0001] This invention relates to the field of wind power generation technology, and more specifically to a heat dissipation device for wind turbine generator sets. Background Technology

[0002] When a wind turbine is running, core components such as the generator, gearbox, and converter generate a large amount of heat due to energy conversion. For example, friction in the gearbox and heating from the generator coil resistance can cause the nacelle temperature to rise sharply. If heat is not dissipated in time, it can lead to a decline in equipment performance or even failure.

[0003] Wind turbines are typically installed in harsh environments, such as high altitudes, deserts, or offshore areas. The main reason is that remote or harsh environments (such as plateaus, deserts, and offshore areas) often have strong and stable winds, making them ideal sites for wind farms. Meanwhile, densely populated areas have high land costs and limited wind energy resources, while deserts and Gobi are sparsely populated and suitable for large-scale wind power projects. When wind turbines are installed in high-altitude Gobi or desert environments, these areas often experience large diurnal temperature variations. This is because the air is thin at high altitudes, and the atmosphere has weak heat retention. During the day, strong solar radiation causes the ground to heat up quickly, while at night, the ground radiates heat away rapidly, causing a sharp drop in temperature. At the same time, sand and gravel have a low specific heat capacity, so they absorb heat quickly during the day, causing a rapid increase in temperature, and then dissipate heat rapidly at night, resulting in a significant drop in temperature.

[0004] Traditional wind turbine cooling systems often use ventilation devices to blow outside air into the wind turbine nacelle to lower the nacelle temperature. However, in desert and Gobi regions, the outside temperature is often high during the day, and this method is often ineffective. In addition, using ventilation to lower the nacelle temperature can allow external impurities to enter the wind turbine nacelle. Since there is often a lot of sand and dust in desert and Gobi regions, these impurities can easily cause wear and tear on the mechanical parts inside the wind turbine nacelle, thus damaging the wind turbine. Summary of the Invention

[0005] In view of the above-mentioned shortcomings of the existing technology, the present invention provides a heat dissipation device for wind turbine generator sets, which can effectively solve the problem that the existing technology cannot effectively dissipate heat from the wind turbine generator nacelle when the external temperature is high in deserts and Gobi.

[0006] To achieve the above objectives, the present invention provides the following technical solution: This invention provides a heat dissipation device for wind turbine generator sets. Includes a first fan housing, a first fan rotatably mounted in the middle of the first fan housing, the first fan being a centrifugal fan, and an air outlet opening on the upper front side of the front end of the first fan; The cooling box comprises two cooling boxes, which are respectively fixedly installed on the left and right sides of the first fan box. An air inlet is provided at the front end of the cooling box away from the first fan box. The cooling air duct is fixedly installed in the cooling box and moves back and forth in the cooling box. Both the upper and lower ends of the cooling air duct are located at the rear end of the cooling box. The cooling water channel is installed inside the cooling air duct. The inlet and outlet ends of the cooling water channel are both attached to the cooling air duct and are respectively fixedly installed with inlet pipe and outlet pipe. A water storage tank, which is connected to an inlet pipe and an outlet pipe via pipes.

[0007] To further explain, the cooling water channel is I-shaped, and the upper and lower sides of the cooling water channel are fixedly connected to the upper and lower sides of the cooling air duct. Multiple cooling water channels are distributed side by side in the cooling air duct.

[0008] To further explain, multiple evenly distributed support fins are fixedly installed side by side in the first fan housing. An auxiliary heat dissipation pipe is installed on the support fins. The auxiliary heat dissipation pipe is T-shaped. The horizontal section of the auxiliary heat dissipation pipe is inserted into the cooling water channel. The vertical section of the auxiliary heat dissipation pipe is fixedly installed on the support fins. The auxiliary heat dissipation pipe is filled with a heat dissipation medium.

[0009] Further explanation: the cooling duct is bent into multiple layers in the cooling box, and the bends of the cooling duct are smoothly transitioned. The front end of the cooling duct has multiple horizontally placed sand outlet grooves. A sand storage chamber is fixedly installed at the front end of the cooling duct. The sand storage chamber is L-shaped. The horizontal section of the sand storage chamber is fixedly connected to the end of the cooling duct with the sand outlet grooves. A sand discharge control device is provided at the lower end of the vertical section of the sand storage chamber.

[0010] Further explanation: The sand discharge control device includes a sand discharge plate, which is slidably connected in the vertical section of the sand storage chamber. The sand discharge plate includes a vertical sliding section and a sand unloading section. The sand unloading section is fixedly installed at the front end of the sand unloading section. The upper ends of the vertical sliding section and the sand unloading section are inclined. Inclined bottom support grooves are provided at both ends of the lower side of the vertical sliding section. Bottom support sliding boxes are fixedly installed on the left and right sides of the sand storage chamber. Bottom support sliders are slidably connected in the bottom support sliding boxes. The bottom support sliders are slidably connected to the bottom support grooves. A first spring is provided in the bottom support sliding box. The two ends of the first spring are respectively fixedly installed between the bottom support slider and the bottom support sliding box.

[0011] Further explanation: A cleaning mechanism is installed in the cooling air duct. The cleaning mechanism includes a cleaning rod, which is slidably connected in the cooling air duct in the front-to-back direction. Multiple cleaning frames are evenly fixedly connected to the cleaning rod, and the cleaning frames are arranged between the cooling water channels. A cleaning spring is sleeved on the cleaning rod, and the two ends of the cleaning spring are respectively fixedly installed on the upper end of the cleaning spring and the cooling air duct. A cleaning pull rope is fixedly connected to the cleaning rod, and the cleaning pull rope is fixedly installed on the sand discharge plate.

[0012] Further explanation: spray chambers are installed on both sides of the vertical section of the cooling water channel. The spray chambers are connected to the cooling water channel and valves are installed at the connection points. Spray nozzles are installed in a row along the front-back direction on the side of the spray chamber that does not contact the cooling water channel.

[0013] To further explain, the lower end of the cooling duct is the air inlet, and a fan is installed at the air inlet. The lower end of the cooling duct is bent downwards.

[0014] To further explain, the water storage tank is equipped with an insulation layer.

[0015] Beneficial effects The technical solution provided by this invention has the following advantages compared with the known prior art: I. This invention uses a motor to drive the rotation of a first fan. The rotation of the first fan creates negative pressure in the cooling box, causing hot air from the wind turbine nacelle to enter the cooling box through the air inlet and ultimately be ejected from the air outlet and re-enter the wind turbine nacelle. Outside air is blown into the cooling duct by the fan. The outside air flows through the cooling duct, which is supported by aluminum material with good thermal conductivity. As the outside air flows through the cooling duct, it can exchange heat effectively with the air from the nacelle in the cooling box. Water is pumped into the water inlet pipe by a water pump. When the water flows into the cooling water channel, the cooling water channel can exchange heat effectively with the air in the cooling box. It can use the outside air to lower the temperature of the air in the wind turbine nacelle. At the same time, it can use the outside air to lower the temperature of the water in the storage tank when the outside air temperature is low. When the outside air temperature is high, it can use the cool water in the storage tank to cool the air in the generator nacelle. At the same time, it can prevent the outside air from directly contacting the air in the nacelle, thereby preventing external impurities such as sand particles from entering the generator nacelle and damaging the parts in the nacelle.

[0016] Second, when the present invention dissipates heat from the air in the cooling box through the cooling water channel, the heat dissipation medium in the auxiliary heat dissipation pipe can be a medium with a boiling point temperature between 30-40 degrees Celsius, such as diethyl ether. When the cooling medium is in the horizontal section of the auxiliary heat dissipation pipe, it will receive heat from the air inside the cooling box. At this time, the cooling medium will evaporate and enter the vertical section of the auxiliary heat dissipation pipe. When the cooling medium enters the cooling water pipe, it will re-condense into water when it comes into contact with the cooler water. Through the above-mentioned technical means, the efficiency of heat exchange can be accelerated.

[0017] Third, in this invention, when the outside air flows along the cooling duct, when the air reaches the bend at the front of the cooling duct, large particles such as sand contained in the outside air will fall into the sand storage chamber due to inertia and gradually accumulate in the sand storage chamber. When the accumulation reaches a certain level, the accumulated impurities are discharged through the sand discharge control device. Attached Figure Description

[0018] 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 some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the overall structure from another perspective of the present invention; Figure 3 This is a schematic diagram of the structure of the first fan box in this invention; Figure 4 This is a schematic diagram of the cooling box structure in this invention; Figure 5 This is a schematic diagram of the structure inside the cooling duct in this invention; Figure 6 For the present invention Figure 5 A magnified view of the structure at point A in the middle; Figure 7 This is a schematic diagram of the internal structure of the sand storage cavity in this invention; Figure 8 This is a schematic diagram of the auxiliary heat dissipation pipe of the present invention; Figure 9 This is a schematic diagram of the water storage tank in this invention.

[0020] Reference numerals: 1. First fan box; 11. First fan; 12. Support fins; 13. Auxiliary heat dissipation pipe; 2. Cooling box; 3. Cooling air duct; 31. Sand outlet trough; 4. Cooling water channel; 41. Water inlet pipe; 42. Water outlet pipe; 43. Water spray chamber; 431. Water spray head; 5. Water storage tank; 6. Sand storage chamber; 7. Sand discharge control device; 71. Sand discharge plate; 711. Vertical sliding section; 712. Sand discharge section; 713. Bottom support groove; 72. Bottom support sliding box; 73. Bottom support slider; 74. First spring; 8. Cleaning mechanism; 81. Cleaning rod; 82. Cleaning frame; 83. Cleaning spring; 84. Cleaning pull rope. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0022] The present invention will be further described below with reference to embodiments.

[0023] like Figures 1 to 9 As shown, the present invention provides a heat dissipation device for wind turbine generator sets. Includes a first fan housing 1, a first fan 11 is rotatably mounted in the middle of the first fan housing 1, the first fan 11 is a centrifugal fan, and an air outlet is opened on the front end of the upper front end of the first fan 11. Cooling box 2, there are two cooling boxes 2, and the cooling boxes 2 are respectively fixedly installed on the left and right sides of the first fan box 1. The front end of the cooling box 2 away from the first fan box 1 has an air inlet. Cooling air duct 3 is fixedly installed in the cooling box 2 and reciprocates in the cooling box 2. The upper and lower ports of the cooling air duct 3 are both located at the rear end of the cooling box 2. Cooling water channel 4 is installed in cooling air duct 3. The inlet and outlet ends of the cooling water channel 4 are both attached to the cooling air duct 3 and are respectively fixedly installed with inlet pipe 41 and outlet pipe 42. Water storage tank 5 is connected to inlet pipe 41 and outlet pipe 42 via pipes.

[0024] The first fan 11 is driven by a motor to rotate. The rotation of the first fan 11 creates a negative pressure in the cooling box 2, which causes the hot air in the wind turbine nacelle to enter the cooling box 2 through the air inlet and finally be thrown out from the air outlet and re-enter the wind turbine nacelle. Outside air is blown into the cooling duct 3 by the fan. The outside air flows in the cooling duct 3, which is supported by aluminum material with good thermal conductivity. When the outside air flows in the cooling duct 3, it can have good heat exchange with the air from the nacelle in the cooling box 2. Water is pumped into the water inlet pipe 41 by a water pump. When the water flows into the cooling water channel 4, the cooling water channel 4 can have good heat exchange with the air in the cooling box 2. During the actual operation, when the outside air temperature is significantly lower than the temperature inside the nacelle, such as at night, the wind turbine nacelle maintains a relatively high temperature due to the continuous operation of core components such as the generator, gearbox, and converter, but the outside ambient temperature is still low. At this time, air is blown into the cooling duct 3 by a fan. As the outside air flows through the cooling duct 3, it exchanges heat with the air inside the generator nacelle in the cooling box 2, thereby reducing the temperature inside the wind turbine nacelle. At the same time, the outside air also exchanges heat with the water flow in the cooling water channel 4, thereby ultimately reducing the temperature of the water in the water storage tank 5.

[0025] When the outside air temperature is high, during the daytime in the desert, the water in the storage tank 5 will be pumped into the cooling water channel 4. When the water flows into the cooling tank 2, it will exchange heat with the air in the cooling tank 2, thereby reducing the temperature of the air in the wind turbine nacelle.

[0026] The above technical solution can utilize outside air to lower the temperature of the air in the wind turbine nacelle. At the same time, it can utilize outside air to lower the temperature of the water in the water storage tank 5 when the outside air temperature is low. When the outside air temperature is high, it can utilize the cooler water in the water storage tank 5 to cool the air in the turbine nacelle. This also avoids direct contact between outside air and the air in the nacelle, thereby preventing external impurities such as sand from entering the turbine nacelle and damaging the parts inside.

[0027] like Figure 5 , Figure 6 and Figure 8 As shown, the cooling water channel 4 is in the shape of an I-beam, and the upper and lower sides of the cooling water channel 4 are fixedly connected to the upper and lower sides of the cooling air duct 3. Multiple cooling water channels 4 are distributed side by side in the cooling air duct 3.

[0028] The water storage tank 5 is equipped with an insulation layer to reduce the impact of the outside air temperature on the water temperature in the water storage tank 5.

[0029] It should be noted that by designing the cooling water channel 4 into the shape described above, the vertical section of the cooling water channel 4 can ensure good air exchange between the water in the cooling water channel 4 and the gas in the cooling air channel 3, while the horizontal section of the cooling water channel 4 can ensure heat exchange between the water in the cooling water channel 4 and the gas in the wind turbine nacelle in the cooling box 2, thereby improving the heat dissipation efficiency.

[0030] like Figure 8 As shown, multiple evenly distributed support fins 12 are fixedly installed side by side in the first fan housing 1. An auxiliary heat dissipation pipe 13 is installed on the support fins 12. The auxiliary heat dissipation pipe 13 is T-shaped. The horizontal section of the auxiliary heat dissipation pipe 13 is inserted into the cooling water channel 4. The vertical section of the auxiliary heat dissipation pipe 13 is fixedly installed on the support fins 12. The auxiliary heat dissipation pipe 13 is filled with a heat dissipation medium.

[0031] It should be noted that when the air in the cooling box 2 is dissipated through the cooling water channel 4, the heat dissipation medium in the auxiliary heat dissipation pipe 13 can be a medium with a boiling point temperature between 30 and 40 degrees Celsius, such as ether. When the cooling medium is in the horizontal section of the auxiliary heat dissipation pipe 13, it will receive heat from the air in the cooling box 2. At this time, the cooling medium will evaporate and enter the vertical section of the auxiliary heat dissipation pipe 13. When the cooling medium enters the cooling water pipe, it will re-condense into water when it comes into contact with the cooler water. Through the above-mentioned technical means, the efficiency of heat exchange can be accelerated.

[0032] like Figure 1 , Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, the cooling air duct 3 is bent into multiple layers in the cooling box 2. The bends of the cooling air duct 3 are smoothly transitioned. The front end of the cooling air duct 3 is provided with multiple horizontally placed sand outlet grooves 31. A sand storage chamber 6 is fixedly installed at the front end of the cooling air duct 3. The sand storage chamber 6 is L-shaped. The horizontal section of the sand storage chamber 6 is fixedly connected to the end of the cooling air duct 3 where the sand outlet grooves 31 are opened. A sand discharge control device 7 is provided at the lower end of the vertical section of the sand storage chamber 6.

[0033] It should be noted that, since the air in the desert and Gobi regions contains a lot of sand and dust, in order to prevent these sand and dust particles from accumulating in the cooling air duct 3, when the outside air flows along the cooling air duct 3, when the air reaches the bend at the front of the cooling air duct 3, the larger particles such as sand in the outside air will fall into the sand storage chamber 6 due to inertia and gradually accumulate in the sand storage chamber 6. When the accumulation reaches a certain level, the accumulated impurities are discharged through the sand discharge control device 7.

[0034] like Figure 7 As shown, the sand discharge control device 7 includes a sand discharge plate 71, which is slidably connected in the vertical section of the sand storage chamber 6. The sand discharge plate 71 includes a vertical sliding section 711 and a sand discharge section 712. The sand discharge section 712 is fixedly installed at its front end. The upper ends of the vertical sliding section 711 and the sand discharge section 712 are inclined. Inclined bottom support grooves 713 are provided at both ends of the lower side of the vertical sliding section 711. Bottom support sliding boxes 72 are fixedly installed on the left and right sides of the sand storage chamber 6. Bottom support sliders 73 are slidably connected in the bottom support sliding boxes 72. The bottom support sliders 73 are slidably connected to the bottom support grooves 713. A first spring 74 is provided in the bottom support sliding box 72. The two ends of the first spring 74 are respectively fixedly installed between the bottom support sliders 73 and the bottom support sliding box 72.

[0035] It should be noted that when impurities gradually accumulate in the sand storage chamber 6, when the accumulation reaches a certain level, the elastic force provided by the first spring 74 can no longer provide enough force to support the sand discharge plate 71 and the impurities on it. At this time, the sand discharge plate 71 will push the bottom support slider 73 into the bottom support slide box 72. Then the sand discharge plate 71 will fall down, thereby discharging the accumulated impurities from the lower front side of the sand storage chamber 6.

[0036] like Figures 5 to 7 As shown, a cleaning mechanism 8 is installed in the cooling air duct 3. The cleaning mechanism 8 includes a cleaning rod 81, which is slidably connected in the cooling air duct 3 in the front-to-back direction. A plurality of cleaning frames 82 are evenly fixedly connected to the cleaning rod 81. The cleaning frames 82 are arranged between the cooling water channels 4. A cleaning spring 83 is sleeved on the cleaning rod 81. The two ends of the cleaning spring 83 are respectively fixedly installed on the upper end of the cleaning spring 83 and the cooling air duct 3. A cleaning pull rope 84 is fixedly connected to the cleaning rod 81. The cleaning pull rope 84 is fixedly installed on the sand discharge plate 71.

[0037] It should be noted that when the sand discharge plate 71 moves downward, the cleaning rope 84 will drive the cleaning rod 81 to move. The cleaning rod 81 will drive the cleaning frame 82 to slide along the cooling air duct 3. A brush is installed on the side of the cleaning rod 81 facing the side wall of the cooling air duct 3. At the same time, the cleaning spring 83 will be compressed. After the action of discharging impurities is completed, the sand discharge plate 71 will return to its initial position under the elastic force of the cleaning spring 83. At the same time, the side wall of the cooling air duct 3 can be cleaned, thereby preventing dust from accumulating on the side wall of the cooling air duct 3.

[0038] like Figure 8As shown, spray chambers 43 are installed on both sides of the vertical section of the cooling water channel 4. The spray chambers 43 are connected to the cooling water channel 4 and valves are installed at the connection positions. Spray nozzles 431 are installed in a row along the front-back direction on the side of the spray chambers 43 that do not contact the cooling water channel 4.

[0039] It should be noted that the valve between the water spray chamber 43 and the cooling water channel 4 can be an electrically controlled valve. By opening the valve between the water spray chamber 43 and the cooling water channel 4, water in the cooling water channel 4 will enter the water spray chamber 43 and be sprayed out through the spray head 431, thereby cleaning the side walls of the cooling air duct 3 and the cooling water channel 4.

[0040] like Figure 1 As shown, the lower end of the cooling duct 3 is the air inlet, and a fan is installed at the air inlet. The lower end of the cooling duct 3 is bent downwards.

[0041] This prevents rainwater from entering the cooling duct 3 during use, and also allows water to drain out effectively even if it accumulates in the cooling duct 3.

[0042] The water storage tank 5 is equipped with an insulation layer.

[0043] This reduces the impact of outside air temperature on the water temperature in storage tank 5.

[0044] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

[0045] It should be noted that when the sand discharge plate 71 moves downward, the cleaning rope 84 will drive the cleaning rod 81 to move. The cleaning rod 81 will drive the cleaning frame 82 to slide along the cooling air duct 3. A brush is installed on the side of the cleaning rod 81 facing the side wall of the cooling air duct 3. At the same time, the cleaning spring 83 will be compressed. After the action of discharging impurities is completed, the sand discharge plate 71 will return to its initial position under the elastic force of the cleaning spring 83. At the same time, the side wall of the cooling air duct 3 can be cleaned, thereby preventing dust from accumulating on the side wall of the cooling air duct 3.

[0046] like Figure 8 As shown, spray chambers 43 are installed on both sides of the vertical section of the cooling water channel 4. The spray chambers 43 are connected to the cooling water channel 4 and valves are installed at the connection positions. Spray nozzles 431 are installed in a row along the front-back direction on the side of the spray chambers 43 that do not contact the cooling water channel 4.

[0047] It should be noted that the valve between the water spray chamber 43 and the cooling water channel 4 can be an electrically controlled valve. By opening the valve between the water spray chamber 43 and the cooling water channel 4, water in the cooling water channel 4 will enter the water spray chamber 43 and be sprayed out through the spray head 431, thereby cleaning the side walls of the cooling air duct 3 and the cooling water channel 4.

[0048] like Figure 1 As shown, the lower end of the cooling duct 3 is the air inlet, and a fan is installed at the air inlet. The lower end of the cooling duct 3 is bent downwards.

[0049] This prevents rainwater from entering the cooling duct 3 during use, and also allows water to drain out effectively even if it accumulates in the cooling duct 3.

[0050] The water storage tank 5 is equipped with an insulation layer.

[0051] This reduces the impact of outside air temperature on the water temperature in storage tank 5.

[0052] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A heat dissipation device for wind turbine generator sets, characterized in that, Includes a first fan box (1), a first fan (11) is rotatably mounted in the middle position of the first fan box (1), the first fan (11) is a centrifugal fan, and an air outlet is opened on the front end of the upper side of the front end of the first fan (11). Cooling box (2), there are two cooling boxes (2), and the cooling boxes (2) are respectively fixedly installed on the left and right sides of the first fan box (1). The front end of the cooling box (2) away from the first fan box (1) is provided with an air inlet; Cooling air duct (3), the cooling air duct (3) is fixedly installed in the cooling box (2), and the cooling air duct (3) is reciprocating in the cooling box (2), and the upper and lower ports of the cooling air duct (3) are located at the rear end of the cooling box (2); Cooling water channel (4), the cooling water channel (4) is installed in the cooling air duct (3), the water inlet end and the water outlet end of the cooling water channel (4) are both attached to the cooling air duct (3) and are respectively fixedly installed with water inlet pipe (41) and water outlet pipe (42); A water storage tank (5) is connected to an inlet pipe (41) and an outlet pipe (42) via pipes.

2. A heat dissipation device for a wind turbine generator set according to claim 1, characterized in that, The cooling water channel (4) is in the shape of an I-shape. The upper and lower sides of the cooling water channel (4) are fixedly connected to the upper and lower sides of the cooling air duct (3). Multiple cooling water channels (4) are distributed side by side in the cooling air duct (3).

3. A heat dissipation device for a wind turbine generator set according to claim 1 or 2, characterized in that, Multiple evenly distributed support fins (12) are fixedly installed side by side in the first fan housing (1). An auxiliary heat dissipation pipe (13) is installed on the support fins (12). The auxiliary heat dissipation pipe (13) is T-shaped. The horizontal section of the auxiliary heat dissipation pipe (13) is inserted into the cooling water channel (4). The vertical section of the auxiliary heat dissipation pipe (13) is fixedly installed on the support fins (12). The auxiliary heat dissipation pipe (13) is filled with heat dissipation medium.

4. A heat dissipation device for a wind turbine generator set according to claim 1 or 2, characterized in that, The cooling air duct (3) is bent into multiple layers in the cooling box (2). The bends of the cooling air duct (3) are smooth transitions. The front end of the cooling air duct (3) is provided with multiple horizontally placed sand outlet grooves (31). A sand storage chamber (6) is fixedly installed at the front end of the cooling air duct (3). The sand storage chamber (6) is L-shaped. The horizontal section of the sand storage chamber (6) is fixedly connected to one end of the cooling air duct (3) where the sand outlet grooves (31) are opened. A sand discharge control device (7) is provided at the lower end of the vertical section of the sand storage chamber (6).

5. A heat dissipation device for a wind turbine generator set according to claim 4, characterized in that, The sand discharge control device (7) includes a sand discharge plate (71), which is slidably connected in the vertical direction to the vertical section of the sand storage chamber (6). The sand discharge plate (71) includes a vertical sliding section (711) and a sand discharge section (712). The sand discharge section (712) is fixedly installed at the front end of the sand discharge section (712). The upper ends of the vertical sliding section (711) and the sand discharge section (712) are inclined. The lower end of the vertical sliding section (711) is inclined. Inclined bottom support grooves (713) are provided at both ends of the side. Bottom support slide boxes (72) are fixedly installed on the left and right sides of the sand storage cavity (6). Bottom support sliders (73) are slidably connected in the bottom support slide boxes (72). The bottom support sliders (73) are slidably connected to the bottom support grooves (713). A first spring (74) is provided in the bottom support slide boxes (72). The two ends of the first spring (74) are fixedly installed between the bottom support sliders (73) and the bottom support slide boxes (72).

6. A heat dissipation device for a wind turbine generator set according to claim 5, characterized in that, A cleaning mechanism (8) is installed in the cooling air duct (3). The cleaning mechanism (8) includes a cleaning rod (81). The cleaning rod (81) is slidably connected in the cooling air duct (3) in the front-back direction. A plurality of cleaning frames (82) are evenly fixedly connected to the cleaning rod (81). The cleaning frames (82) are arranged between the cooling water channels (4). A cleaning spring (83) is sleeved on the cleaning rod (81). The two ends of the cleaning spring (83) are respectively fixedly installed on the upper end of the cleaning spring (83) and the cooling air duct (3). A cleaning pull rope (84) is fixedly connected to the cleaning rod (81). The cleaning pull rope (84) is fixedly installed on the sand discharge plate (71).

7. A heat dissipation device for a wind turbine generator set according to claim 6, characterized in that, Water spray chambers (43) are installed on both sides of the vertical section of the cooling water channel (4). The water spray chambers (43) are connected to the cooling water channel (4) and valves are installed at the connected positions. Water spray heads (431) are installed in a row along the front-back direction on the side of the water spray chamber (43) that does not contact the cooling water channel (4).

8. A heat dissipation device for a wind turbine generator set according to claim 1, characterized in that, The lower end of the cooling duct (3) is the air inlet, and a fan is installed at the air inlet. The lower end of the cooling duct (3) is bent downward.

9. A heat dissipation device for a wind turbine generator set according to claim 1, characterized in that, The water storage tank (5) is provided with an insulation layer.

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