A heat dissipation device for a wind turbine generator system

Abstract

The application relates to the technical field of wind power generation, in particular to a heat dissipation device for a wind turbine generator unit, which comprises a first fan box, a first fan is rotatably arranged at the middle position of the first fan box, cooling boxes are fixedly arranged on the left and right sides of the first fan box, a cooling air duct is arranged in the cooling boxes and is reciprocating in the cooling boxes, a cooling water duct is arranged in the cooling air duct, the water inlet end and the water outlet end of the cooling water duct are attached to the cooling air duct and are fixedly arranged with a water inlet pipe and a water outlet pipe respectively, and the water inlet pipe and the water outlet pipe are connected with a water storage tank, so that the heat dissipation device can effectively solve the problem that the wind turbine generator cabin cannot be well cooled when the external temperature is high in the desert and the Gobi.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of wind power generation, in particular to a heat dissipation device for a wind turbine generator system. BACKGROUND

[0002] During the operation of the wind turbine generator system, a large amount of heat is generated by the core components such as the generator, the gearbox and the converter due to energy conversion. For example, the friction of the gearbox and the heat generated by the resistance of the generator coil can cause the temperature in the nacelle to rise sharply. If the heat is not dissipated in time, it can cause the performance of the equipment to decline or even fail.

[0003] The wind turbine generator system is usually installed in an environment with harsh conditions, such as high altitude, desert or sea, etc. The main reason is that remote or harsh environment areas (such as high altitude, desert, sea, etc.) often have strong and stable wind, which is an ideal location for wind power plants. At the same time, the land cost is high in densely populated areas and the wind energy resources are limited, while the desert and the Gobi are sparsely populated and suitable for large-scale wind power project construction. When the wind turbine is installed in a high-altitude Gobi or desert environment, the temperature difference between day and night in these areas is often large. Because the air is thin at high altitudes, the atmospheric heat preservation is weak, the solar radiation is strong during the day, and the ground warms up quickly. At night, the ground radiates heat quickly, and the temperature drops sharply. At the same time, the specific heat capacity of sand and stone is small, so the heat is absorbed quickly during the day, and the temperature rises sharply. At night, the heat is dissipated quickly, resulting in a large drop in temperature.

[0004] The traditional heat dissipation device for the wind turbine generator often uses an air exchange device to blow external air into the wind turbine generator cabin to reduce the temperature in the cabin. However, in the desert and Gobi areas, the external temperature is often high during the day, and the above-mentioned method often does not have good results. At the same time, using air exchange to reduce the temperature in the cabin can cause impurities from the outside to enter the wind turbine generator cabin, and the wind and sand in the desert and Gobi areas are often more. These impurities can easily cause wear and tear of the mechanical parts when they are running in the wind turbine generator cabin, thereby damaging the wind turbine generator. SUMMARY

[0005] In view of the above-mentioned shortcomings of the prior art, the present application provides a heat dissipation device for a wind turbine generator system, which can effectively solve the problem that the wind turbine generator cabin cannot be effectively cooled in the desert and Gobi areas when the external air temperature is high.

[0006] To achieve the above-mentioned purposes, the present application is realized by the following technical solutions:

[0007] The present application provides a heat dissipation device for a wind turbine generator system,

[0008] comprising a first fan box, a first fan is rotatably arranged in the middle position of the first fan box, the first fan is a centrifugal fan, and an air outlet is formed in the front end of the upper side of the first fan.

[0009] cooling boxes, two, fixedly installed on the left and right sides of the first fan box, the front end of the cooling box being provided with an air inlet away from the first fan box;

[0010] cooling air ducts, fixedly installed in the cooling boxes, the cooling air ducts being reciprocating in the cooling boxes, the upper and lower ports of the cooling air ducts being located at the rear end of the cooling box;

[0011] cooling water channels, installed in the cooling air ducts, the water inlet and outlet ends of the cooling water channels being attached to the cooling air ducts and fixedly installed with water inlet and outlet pipes, respectively;

[0012] water storage tanks, connected to the water inlet and outlet pipes through pipes.

[0013] Further description, the cooling water channel is in the shape of an I-beam, the upper and lower sides of the cooling water channel being fixedly connected to the upper and lower sides of the cooling air duct, and the cooling water channel being distributed in parallel in the cooling air duct.

[0014] Further description, a plurality of uniformly distributed support fins are fixedly installed in the first fan box in parallel, the support fins being installed with auxiliary heat dissipation pipes, the auxiliary heat dissipation pipes being in the shape of T, the horizontal section of the auxiliary heat dissipation pipe below being inserted into the cooling water channel, the vertical section of the auxiliary heat dissipation pipe being fixedly installed on the support fin, and the auxiliary heat dissipation pipe being filled with heat dissipation medium.

[0015] Further description, the cooling air duct is bent into multiple layers in the cooling box, the bending part of the cooling air duct being in the shape of smooth transition, the front end of the cooling air duct being provided with a plurality of transversely arranged sand discharge grooves, and the front end of the cooling air duct being fixedly installed with a sand storage cavity, the sand storage cavity being in the shape of L, the horizontal section of the sand storage cavity being fixedly connected to the end of the cooling air duct provided with the sand discharge groove, and the lower end of the vertical section of the sand storage cavity being provided with a sand discharge control device.

[0016] Further description, the sand discharge control device includes a sand discharge plate, the sand discharge plate being slidingly connected in the vertical section of the sand storage cavity in the vertical direction, the sand discharge plate including a vertical sliding section and a sand unloading section, the sand unloading section being fixedly installed at the front end of the sand unloading section, the upper ends of the vertical sliding section and the sand unloading section being in the shape of inclination, the lower side of the vertical sliding section being provided with inclined bottom supporting grooves at both ends, the sand storage cavity being fixedly installed with bottom supporting sliding boxes at both sides, the bottom supporting sliding boxes being slidingly connected with bottom supporting sliding blocks, the bottom supporting sliding boxes being provided with first springs, and both ends of the first spring being fixedly installed between the bottom supporting sliding blocks and the bottom supporting sliding boxes.

[0017] Further, the cooling air duct is provided with a cleaning mechanism, the cleaning mechanism comprises a cleaning rod, the cleaning rod is slidably connected in the cooling air duct in the front-rear direction, a plurality of cleaning frames are uniformly and fixedly connected to the cleaning rod, the cleaning frames are arranged between the cooling water channels, a cleaning spring is sleeved on the cleaning rod, two ends of the cleaning spring are fixedly installed on the cleaning spring and the upper end of the cooling air duct respectively, and a cleaning pull rope is fixedly connected to the cleaning rod and fixedly installed on the sand discharging plate.

[0018] Further, the cooling water channel is provided with a water spraying cavity on both sides of the vertical section, the water spraying cavity is communicated with the cooling water channel and is provided with a valve at the communicated position, and a water spraying head is arranged on one side of the water spraying cavity which does not contact the cooling water channel in the front-rear direction.

[0019] Further, the lower end of the cooling air duct is curved downward.

[0020] Further, the water storage tank is externally provided with a heat preservation layer.

[0021] Beneficial effects

[0022] Compared with the known prior art, the technical scheme provided by the application has the following beneficial effects:

[0023] Firstly, the rotation of the first fan driven by the motor generates negative pressure in the cooling box, so that the hot air in the wind turbine cabin enters the cooling box from the air inlet and is finally thrown out from the air outlet to re-enter the wind turbine cabin, external air is blown into the cooling air duct by the fan, the external air flows in the cooling air duct, the cooling air duct is supported by aluminum material with good heat conductivity, and the external air can exchange heat with the air in the cooling box when flowing in the cooling air duct, water flow is pumped into the water inlet pipe by the water pump, the cooling water channel can exchange heat with the air in the cooling box when the water flow enters the cooling water channel, the temperature of the air in the wind turbine cabin can be reduced by using external air, the temperature of the water in the water storage tank can be reduced by using external air when the air temperature is low, the air in the wind turbine cabin can be cooled by using the water in the water storage tank with lower temperature when the external air temperature is high, and direct contact between the external air and the air in the cabin can be avoided, so that foreign matters such as sand particles can be prevented from entering the cabin and damaging the parts in the cabin.

[0024] Secondly, when the air in the cooling box is cooled by the cooling water channel, the cooling medium in the auxiliary cooling pipe can adopt a medium with a boiling point temperature between 30-40 degrees, such as diethyl ether. When the cooling medium is in the horizontal section of the auxiliary cooling pipe, it will receive heat from the cabin air in the cooling box, at which time the cooling medium will evaporate and enter the vertical section of the auxiliary cooling pipe. When the cooling medium enters the cooling water pipe and contacts the water body with a lower temperature, it will re-condense into water. Through the above technical means, the heat exchange efficiency can be accelerated.

[0025] Thirdly, in the present application, when the outside air flows along the cooling air duct, when the air reaches the bending position in front of the cooling air duct, the sand particles and other larger particles contained in the outside air will fall into the sand storage cavity along the sand outlet groove due to inertia and gradually accumulate in the sand storage cavity. When the accumulation reaches a certain degree, the accumulated impurities are discharged through the sand discharge control device. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0027] Figure 1 is a schematic diagram of the overall structure of the present application;

[0028] Figure 2 is a schematic diagram of the overall structure of the present application from another perspective;

[0029] Figure 3 is a schematic diagram of the structure of the first fan box in the present application;

[0030] Figure 4 is a schematic diagram of the structure of the cooling box in the present application;

[0031] Figure 5 is a schematic diagram of the structure inside the cooling air duct in the present application;

[0032] Figure 6 is a schematic diagram of the structure inside the cooling air duct in the present application; Figure 5

[0033] Figure 7 is a schematic diagram of the internal structure of the sand storage cavity in the present application;

[0034] Figure 8 is a schematic diagram of the structure of the auxiliary cooling pipe in the present application;

[0035] ​Figure 9 Structure diagram of the water storage tank in the application.

[0036] Fig. 1 is a first fan box; 11 is a first fan; 12 is a support fin; 13 is an auxiliary heat dissipation pipe; 2 is a cooling box; 3 is a cooling air duct; 31 is a sand outlet; 4 is a cooling water channel; 41 is a water inlet pipe; 42 is a water outlet pipe; 43 is a water spraying cavity; 431 is a water spraying head; 5 is a water storage tank; 6 is a sand storage cavity; 7 is a sand discharge control device; 71 is a sand discharge plate; 711 is a vertical sliding section; 712 is a sand unloading section; 713 is a bottom supporting groove; 72 is a bottom supporting sliding box; 73 is a bottom supporting sliding block; 74 is a first spring; 8 is a cleaning mechanism; 81 is a cleaning rod; 82 is a cleaning frame; 83 is a cleaning spring; 84 is a cleaning pull rope. DETAILED DESCRIPTION

[0037] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0038] The present application will be further described below with reference to the embodiments.

[0039] As shown in Figures 1 to 9 the present application provides a heat dissipation device for a wind turbine,

[0040] including a first fan box 1, a first fan 11 rotatably arranged at a middle position of the first fan box 1, the first fan 11 being a centrifugal fan, and an air outlet being formed at an upper front end of the first fan 11;

[0041] two cooling boxes 2, each of which is fixedly installed at left and right sides of the first fan box 1, and an air inlet being formed at a front end of the cooling box 2 away from the first fan box 1;

[0042] a cooling air duct 3 fixedly installed in the cooling box 2, and the cooling air duct 3 being reciprocating in the cooling box 2, and upper and lower ports of the cooling air duct 3 being located at a rear end of the cooling box 2;

[0043] a cooling water channel 4 installed in the cooling air duct 3, and a water inlet pipe 41 and a water outlet pipe 42 being fixedly installed at a water inlet end and a water outlet end of the cooling water channel 4 respectively and being attached to the cooling air duct 3;

[0044] A water storage tank 5 is connected with the water inlet pipe 41 and the water outlet pipe 42 through pipes.

[0045] The rotation of the first fan 11 driven by the motor generates negative pressure in the cooling box 2, so that the hot air in the wind turbine cabin enters the cooling box 2 from the air inlet and is finally thrown out from the air outlet to re-enter the wind turbine cabin. The fan blows external air into the cooling air duct 3, and the external air flows in the cooling air duct 3. The cooling air duct 3 is supported by aluminum material with good heat conductivity. When the external air flows in the cooling air duct 3, it can exchange heat with the air in the cooling box 2 from the cabin. The water pump pumps water into the water inlet pipe 41. When the water flows into the cooling water duct 4, the cooling water duct 4 can exchange heat with the air in the cooling box 2.

[0046] In the specific working process, when the external air temperature is obviously lower than the temperature in the cabin, for example at night, the wind turbine cabin still maintains a high temperature because the core components such as the generator, gear box and converter continue to work, but the external environment temperature is still low. At this time, the fan blows air into the cooling air duct 3. During the flow of the external air in the cooling air duct 3, heat exchange occurs between the external air and the air in the cooling box 2 from the cabin, thereby reducing the temperature in the wind turbine cabin. At the same time, the external air also exchanges heat with the water flow in the cooling water duct 4, thereby finally reducing the temperature of the water body in the water storage tank 5.

[0047] When the external air is high, such as in the desert during the day, the water body in the water storage tank 5 is pumped into the cooling water duct 4. When the water body flows in the cooling water duct 4 to the cooling box 2, heat exchange occurs between the water body and the air in the cooling box 2, thereby reducing the temperature of the air in the wind turbine cabin.

[0048] Through the above technical solution, the external air can be used to reduce the temperature of the air in the wind turbine cabin. At the same time, when the air temperature is low, the external air can be used to reduce the temperature of the water body in the water storage tank 5. When the external air temperature is high, the water body with low temperature in the water storage tank 5 can be used to cool the air in the generator cabin. At the same time, direct contact between the external air and the air in the cabin can be avoided, thereby preventing external impurities such as sand particles from entering the generator cabin and causing damage to the parts in the cabin.

[0049] As shown in Figure 5 , Figure 6 and Figure 8 , the cooling water duct 4 is in the shape of an I-beam. The upper and lower sides of the cooling water duct 4 are fixedly connected with the upper and lower sides of the cooling air duct 3. The cooling water duct 4 is distributed in parallel with multiple cooling water ducts 4 in the cooling air duct 3.

[0050] The water storage tank 5 is provided with a heat preservation layer, so as to reduce the influence of the ambient temperature on the water temperature in the water storage tank 5.

[0051] It should be noted that by designing the cooling water channel 4 into the above shape, the water in the cooling water channel 4 and the gas in the cooling air channel 3 can be well exchanged through the vertical section of the cooling water channel 4, and the water in the cooling water channel 4 and the gas in the wind turbine cabin in the cooling box 2 can be exchanged through the horizontal section of the cooling water channel 4, thereby improving the heat dissipation efficiency.

[0052] As shown in Figure 8 , a plurality of uniformly distributed support fins 12 are fixedly installed side by side in the first fan box 1, and an auxiliary heat dissipation pipe 13 is installed on the support fin 12, the auxiliary heat dissipation pipe 13 is T-shaped, the horizontal section of the auxiliary heat dissipation pipe 13 below is inserted into the cooling water channel 4, the vertical section of the auxiliary heat dissipation pipe 13 is fixedly installed on the support fin 12, and the auxiliary heat dissipation pipe 13 is filled with a heat dissipation medium.

[0053] It should be noted that when the air in the cooling box 2 is cooled by the cooling water channel 4, the heat dissipation medium in the auxiliary heat dissipation pipe 13 can adopt a medium with a boiling point temperature of 30-40 degrees, such as diethyl 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 cabin in the cooling box 2, at which time the cooling medium will evaporate into the vertical section of the auxiliary heat dissipation pipe 13. When the cooling medium enters the cooling water pipe and contacts the water body with a lower temperature, it will re-condense into water. Through the above technical means, the heat exchange efficiency can be accelerated.

[0054] As shown in Figure 1 , Figure 4 , Figure 5 , Figure 6 and Figure 7 , the cooling air channel 3 is bent into multiple layers in the cooling box 2, the bending part of the cooling air channel 3 is smoothly transitioned, a plurality of transversely arranged sand discharge grooves 31 are formed in the front end of the cooling air channel 3, a sand storage cavity 6 is fixedly installed at the front end of the cooling air channel 3, the sand storage cavity 6 is L-shaped, the horizontal section of the sand storage cavity 6 is fixedly connected with one end of the cooling air channel 3 where the sand discharge grooves 31 are formed, and the lower end of the vertical section of the sand storage cavity 6 is provided with a sand discharge control device 7.

[0055] It should be noted that, since the air in the desert Gobi area contains more sand dust, in order to prevent the sand dust in the cooling air duct 3 from being accumulated, when the outside air flows along the cooling air duct 3, when the air reaches the bending position in front of the cooling air duct 3, the sand particles and other larger particles contained in the outside air will fall into the sand storage cavity 6 along the sand outlet groove 31 due to inertia and gradually accumulate in the sand storage cavity 6. When accumulated to a certain extent, the accumulated impurities are discharged through the sand discharge control device 7.

[0056] As shown in Figure 7 The sand discharge control device 7 includes a sand discharge plate 71 which is slidingly connected in the vertical section of the sand storage cavity 6 in the vertical direction, the sand discharge plate 71 includes a vertical sliding section 711 and a sand unloading section 712, the sand unloading section 712 is fixedly installed at the front end of the sand unloading section 712, the upper ends of the vertical sliding section 711 and the sand unloading section 712 are inclined, the lower ends of the vertical sliding section 711 are provided with inclined bottom supporting grooves 713, the sand storage cavity 6 is fixedly installed with a bottom supporting sliding box 72 on the left and right sides, the bottom supporting sliding box 72 is slidingly connected with a bottom supporting sliding block 73, the bottom supporting sliding block 73 is slidingly connected with the bottom supporting groove 713, the bottom supporting sliding box 72 is provided with a first spring 74, and the two ends of the first spring 74 are fixedly installed between the bottom supporting sliding block 73 and the bottom supporting sliding box 72.

[0057] It should be noted that when the impurities gradually accumulate in the sand storage cavity 6, when the accumulated impurities reach a certain degree and the elastic force provided by the first spring 74 cannot provide enough force to support the sand discharge plate 71 and the impurities thereon, the sand discharge plate 71 will push the bottom supporting sliding block 73 into the bottom supporting sliding box 72, at this time the sand discharge plate 71 will fall, thereby discharging the accumulated impurities from the front side of the lower end of the sand storage cavity 6.

[0058] As shown in Figures 5 to 7 The cleaning mechanism 8 is installed in the cooling air duct 3, the cleaning mechanism 8 includes a cleaning rod 81 which is slidingly connected in the cooling air duct 3 in the front-rear direction, a plurality of cleaning frames 82 are uniformly fixedly connected on the cleaning rod 81, the cleaning frames 82 are arranged between the cooling water ducts 4, a cleaning spring 83 is sleeved on the cleaning rod 81, the two ends of the cleaning spring 83 are fixedly installed on the cleaning spring 83 and the upper end of the cooling air duct 3, a cleaning pull rope 84 is fixedly connected on the cleaning rod 81, and the cleaning pull rope 84 is fixedly installed on the sand discharge plate 71.

[0059] It should be noted that when the sand discharging plate 71 moves downward, the cleaning pull rope 84 drives the cleaning rod 81 to move, the cleaning rod 81 drives the cleaning frame 82 to slide along the cooling air duct 3, a brush is installed on the cleaning rod 81 and faces the side wall of the cooling air duct 3, and meanwhile the cleaning spring 83 is compressed; after the impurity discharging action is completed, the sand discharging plate 71 returns to the initial position under the elastic force of the cleaning spring 83, and 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.

[0060] As shown in Figure 8 the vertical section of the cooling water channel 4 is installed with a water spraying cavity 43 on both sides, the water spraying cavity 43 communicates with the cooling water channel 4 and is installed with a valve at the communicating position, and the side of the water spraying cavity 43 not contacting the cooling water channel 4 is installed with a water spraying head 431 in an array along the front-rear direction.

[0061] It should be noted that the valve between the water spraying cavity 43 and the cooling water channel 4 can be an electrically controlled valve; by opening the valve between the water spraying cavity 43 and the cooling water channel 4, the water in the cooling water channel 4 enters the water spraying cavity 43 and is sprayed out through the water spraying head 431, thereby cleaning the side wall of the cooling air duct 3 and the cooling water channel 4.

[0062] As shown in Figure 1 the lower end of the cooling air duct 3 is an air inlet end, the air inlet end is installed with a fan, and the lower end of the cooling air duct 3 is bent downward.

[0063] In this way, rainwater can be prevented from entering the cooling air duct 3 in the process of use, and even if there is accumulated water in the cooling air duct 3, it can also be well drained.

[0064] The water storage tank 5 is externally provided with a heat preservation layer.

[0065] In this way, the temperature of the water in the water storage tank 5 can be reduced from the influence of the air temperature outside.

[0066] The above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced by equivalents; and these modifications or replacements will not make the essence of the corresponding technical solutions deviate from the protection scope of the technical solutions of the embodiments of the present application.

[0067] It should be noted that when the sand discharging plate 71 moves downward, the cleaning pull rope 84 drives the cleaning rod 81 to move, the cleaning rod 81 drives the cleaning frame 82 to slide along the cooling air duct 3, a brush is installed on the cleaning rod 81 and faces the side wall of the cooling air duct 3, and meanwhile the cleaning spring 83 is compressed; after the impurity discharging action is completed, the sand discharging plate 71 returns to the initial position under the elastic force of the cleaning spring 83, and 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.

[0068] As shown in Figure 8 the vertical section of the cooling water channel 4 is installed with a water spraying cavity 43 on both sides, the water spraying cavity 43 communicates with the cooling water channel 4 and is installed with a valve at the communicating position, and the side of the water spraying cavity 43 not contacting the cooling water channel 4 is installed with a water spraying head 431 in an array along the front-rear direction.

[0069] It should be noted that the valve between the water spraying cavity 43 and the cooling water channel 4 can be an electrically controlled valve; by opening the valve between the water spraying cavity 43 and the cooling water channel 4, the water in the cooling water channel 4 enters the water spraying cavity 43 and is sprayed out through the water spraying head 431, thereby cleaning the side wall of the cooling air duct 3 and the cooling water channel 4.

[0070] As shown in Figure 1 the lower end of the cooling air duct 3 is an air inlet end, the air inlet end is installed with a fan, and the lower end of the cooling air duct 3 is bent downward.

[0071] In this way, rainwater can be prevented from entering the cooling air duct 3 in the process of use, and even if there is accumulated water in the cooling air duct 3, it can also be well discharged.

[0072] The water storage tank 5 is externally provided with a heat preservation layer.

[0073] In this way, the water temperature in the water storage tank 5 can be reduced from the influence of the air temperature outside.

[0074] The above embodiments are only used to illustrate the technical solutions of the present application, and not to limit it; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced by equivalents; and these modifications or replacements will not make the essence of the corresponding technical solutions deviate from the protection scope of the technical solutions of the embodiments of the present application.

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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