Ventilation and heat dissipation structure of wind turbine nacelle

Abstract

The application relates to the technical field of wind driven generators, in particular to a wind driven generator cabin ventilation and heat dissipation structure which comprises a cabin cover and a temperature sensor arranged in the cabin cover, a first fan is fixedly inserted in the side wall of the cabin cover, the air outlet end of the first fan is communicated with the inner cavity of the cabin cover, the air inlet end of the first fan is communicated with the external environment, a first straight pipeline is fixedly connected to the inner side wall of the cabin cover, the first straight pipeline is communicated with the air outlet end of the first fan, a plurality of first moisture absorbents are arranged in the first straight pipeline, an arc-shaped pipeline is arranged at the end of the first straight pipeline far from the first fan, the free end of the arc-shaped pipeline is communicated with a second straight pipeline, and a plurality of second moisture absorbents are arranged in the second straight pipeline; the wind driven generator and other equipment in the cabin cover can be prevented from being in a humid environment for a long time, so that the service life of the wind driven generator and other equipment is prolonged.

Description

Technical Field

[0001] This invention relates to the field of wind turbine technology, and in particular to a ventilation and heat dissipation structure for a wind turbine nacelle. Background Technology

[0002] Wind power generation refers to converting the kinetic energy of wind into electrical energy. Wind energy is a clean and pollution-free renewable energy source that has been utilized by people for a long time, mainly through windmills for pumping water and grinding grains. Wind power generation is very environmentally friendly, and the amount of wind energy is enormous, so it is receiving increasing attention from countries around the world. In wind power generation, wind energy is generally converted into mechanical work by wind turbines. The mechanical work drives the rotor of the wind turbine to rotate, and finally converts it into electrical energy. To ensure that the wind turbine can provide stable output power, a safe and stable working environment is required. The nacelle, or wind turbine shell, is used to install and protect the wind turbine and its accessories. The stability, strength, wind and dust resistance of its overall structure directly affect the sustainability, safety, and power generation efficiency of the wind turbine.

[0003] In the process of offshore wind power generation, the current method of using a nacelle cover to dissipate heat is to directly open ventilation holes on the nacelle cover. Although this method is simple to manufacture, after the outside humid air enters the nacelle cover, it will directly contact the wind turbine and other equipment inside the nacelle cover. The wind turbine and other equipment will be in a humid environment for a long time, which will accelerate the corrosion rate of the wind turbine and other equipment, thereby shortening the service life of the wind turbine and other equipment. In order to solve the above problems, this invention proposes a ventilation and heat dissipation structure for wind turbine nacelles. Summary of the Invention

[0004] To achieve the above objectives, the present invention provides a ventilation and heat dissipation structure for a wind turbine nacelle, including a nacelle cover and a temperature sensor disposed inside the nacelle cover. A first fan is fixedly inserted into the side wall of the nacelle cover, the outlet end of the first fan is connected to the inner cavity of the nacelle cover, and the inlet end of the first fan is connected to the external environment. A first straight pipe is fixedly connected to the inner side wall of the nacelle cover, and the first straight pipe is connected to the outlet end of the first fan. A plurality of first desiccant particles are disposed inside the first straight pipe. An arc-shaped pipe is connected to the end of the first straight pipe away from the first fan, and a second straight pipe is connected to the free end of the arc-shaped pipe. A plurality of second desiccant particles are disposed inside the second straight pipe.

[0005] Optionally, a filter screen is provided inside the first straight pipe and / or the arc-shaped pipe and / or the second straight pipe, and a humidity sensor is provided on the filter screen. The humidity sensor is located between the first desiccant and the second desiccant, and the humidity sensor is used to sense the humidity of the cooled air after passing through the first desiccant.

[0006] Optionally, a dehumidification mechanism is also included. When the humidity sensor detects that the humidity of the cooled air after passing through the first desiccant is greater than a preset threshold, the dehumidification mechanism is activated to dehumidify the first desiccant. The dehumidification mechanism includes a first horn-shaped pipe fixedly inserted into the first straight pipe. The first horn-shaped pipe is connected to the inner cavity of the first straight pipe. A third straight pipe is connected to the end of the first horn-shaped pipe away from the first straight pipe. The third straight pipe is fixedly inserted into the side plate of the cabin cover. A suction machine is installed inside the third straight pipe.

[0007] Optionally, an isolation mechanism is also included. The isolation mechanism is used to seal and surround the first desiccant when the dehumidification mechanism dehumidifies the first desiccant. The isolation mechanism includes a support cylinder, and an isolation plate is fixedly connected to both the upper and lower ends of the support cylinder. Both isolation plates are movably inserted into the first straight pipe. The two isolation plates are respectively located above and below a plurality of the first desiccant particles. A cylinder arm is fixedly installed on the outer wall of the support cylinder. The free end of the cylinder arm is fixedly connected to the driving end of a driving cylinder. The driving cylinder is fixedly installed on the outer wall of the second straight pipe.

[0008] Optionally, a pressurized purging mechanism is also included. The pressurized purging mechanism and the dehumidification mechanism are respectively disposed on both sides of the first desiccant. The pressurized purging mechanism is used to pressurize and purge the moisture in the first desiccant from the other side when the dehumidification mechanism dehumidifies the first desiccant from one side. The pressurized purging mechanism includes a fixed cylinder fixedly inserted into the first straight pipe. A pressurized purging machine is fixedly connected to the inner wall of the fixed cylinder. A ventilation hole is opened on the side plate of the fixed cylinder. The ventilation hole is used to communicate between the inner cavity of the cabin cover and the inner cavity of the first straight pipe.

[0009] Optionally, a second horn-shaped pipe is fixedly installed inside the fixed cylinder. The second horn-shaped pipe has a first opening and a second opening. The size of the first opening is larger than the size of the second opening. The first opening is oriented towards the booster purging machine. A sealing plug is movably inserted into the second horn-shaped pipe and the ventilation hole. The sealing plug includes a platform section and a rectangular section. The platform section abuts against the inner wall of the second horn-shaped pipe. A first guide support assembly is fixedly connected to one end of the sealing plug outside the second horn-shaped pipe. The free end of the first guide support assembly is fixedly connected to the inner wall of the support cylinder.

[0010] Optionally, the first guide support assembly includes a first guide support rod, a first guide support cylinder, and a first guide support spring. The first guide support rod is movably inserted into the first guide support cylinder. The first guide support spring is wound around the outside of the first guide support rod. One end of the first guide support spring is fixedly connected to the side wall of the first guide support rod, and the other end of the first guide support spring is fixedly connected to the outer side wall of the first guide support cylinder. The first guide support cylinder is connected to the support cylinder, and the first guide support rod is connected to the sealing plug.

[0011] Optionally, a leak-proof mechanism is also included, comprising a leak-proof plate movably inserted into the top plate of the third straight pipe. The lower end of the leak-proof plate abuts against the inner bottom wall of the third straight pipe. A first pull rod is fixedly connected to the upper end of the leak-proof plate. One end of a second push-pull rod is hinged to the side wall of the first pull rod. The other end of the second push-pull rod is hinged to a third push-pull rod. The third push-pull rod is movably inserted into the first straight pipe, and the end of the third push-pull rod located inside the first straight pipe is fixedly connected to the isolation plate.

[0012] Optionally, the anti-leakage mechanism further includes a support slider, which is fixedly mounted on the side wall of the first pull rod and slidably mounted in a support groove. The support groove is fixedly mounted on the inner side wall of the cabin cover, and a second guide support assembly is fixedly connected to the upper end surface of the support slider. The upper end of the second guide support assembly is fixedly connected to the side wall of the support groove.

[0013] Optionally, the second guide support assembly includes a second guide support rod, a second guide support cylinder, and a second guide support spring. The second guide support rod is movably inserted into the second guide support cylinder, and the second guide support spring is wound around the outside of the second guide support rod. One end of the second guide support spring is fixedly connected to the side wall of the second guide support rod, and the other end of the second guide support spring is fixedly connected to the outer side wall of the second guide support cylinder. The second guide support cylinder is connected to the support slider, and the second guide support rod is connected to the support groove.

[0014] The beneficial effects of this invention are as follows: This invention improves the existing wind turbine nacelle heat dissipation structure by adding a combination of a first desiccant and a second desiccant. This combination dehumidifies the cooling gas, keeping the cooling gas inside the nacelle dry. This prevents the wind turbine and other equipment inside the nacelle from being in a humid environment for extended periods, thereby slowing down the corrosion rate of the wind turbine and other equipment and extending their service life. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of an embodiment of the ventilation and heat dissipation structure for the wind turbine nacelle of the present invention; Figure 2 The present invention relates to a ventilation and heat dissipation structure for a wind turbine nacelle. Figure 1 Enlarged schematic diagram of structure A in the middle; Figure 3 The present invention relates to a ventilation and heat dissipation structure for a wind turbine nacelle. Figure 2 Enlarged schematic diagram of the B-structure; Figure 4 This is a schematic diagram of the dehumidification mechanism and isolation mechanism of the wind turbine nacelle ventilation and heat dissipation structure of the present invention, which are located inside the nacelle cover. Figure 5 The present invention relates to a ventilation and heat dissipation structure for a wind turbine nacelle. Figure 4 Enlarged schematic diagram of the C structure in the image; Figure 6 This is a schematic diagram of the pressurized purging mechanism of the wind turbine nacelle ventilation and heat dissipation structure of the present invention, which is located inside the nacelle cover. Figure 7 The present invention relates to a ventilation and heat dissipation structure for a wind turbine nacelle. Figure 6 Enlarged schematic diagram of the D-structure; Figure 8 This is a schematic diagram of the anti-leakage mechanism of the ventilation and heat dissipation structure of the wind turbine nacelle of the present invention; Figure 9 The present invention relates to a ventilation and heat dissipation structure for a wind turbine nacelle. Figure 8 Enlarged schematic diagram of the E-structure.

[0016] Explanation of reference numerals in the attached figures 1. Cabin cover; 2. First fan; 3. First straight duct; 4. First desiccant; 5. Arc-shaped pipe; 6. Second straight duct; 7. Second desiccant; 8. Filter screen; 9. Humidity sensor; 10. Dehumidification mechanism; 10. First horn-shaped duct; 101. Third straight duct; 102. Suction machine; 103. Isolation mechanism; 11. Support cylinder; 111. Isolation plate; 112. Cylinder arm; 113. Drive cylinder; 114. Pressurized purging mechanism; 12. Fixed cylinder; 121. Pressurized purging machine; 122. Second horn-shaped duct; 123. Sealing plug; 12 4. First guide support assembly 125, first guide support rod 1251, first guide support cylinder 1252, first guide support spring 1253, anti-leakage mechanism 13, anti-leakage plate 131, first pull rod 132, support slider 133, support groove 134, second guide support assembly 135, second guide support rod 1351, second guide support cylinder 1352, second guide support spring 1353, second push-pull rod 136, third push-pull rod 137, temperature sensor 14. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions in the embodiments of this 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 this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without inventive effort are within the scope of protection of this invention. Unless otherwise defined, the technical or scientific terms used herein should have the ordinary meaning understood by those skilled in the art. The terms "comprising" and similar expressions used herein mean that the element or object preceding the word covers the element or object listed following the word and its equivalents, but do not exclude other elements or objects.

[0018] To address the problems existing in the prior art, embodiments of the present invention provide a ventilation and heat dissipation structure for a wind turbine nacelle, such as... Figure 1 and Figure 2As shown, the wind turbine nacelle ventilation and heat dissipation structure includes a nacelle cover 1, inside which wind turbines and other equipment are installed. A temperature sensor 14 is also located inside the nacelle cover 1. A first fan 2 is fixedly inserted into the side wall of the nacelle cover 1. The outlet of the first fan 2 is connected to the inner cavity of the nacelle cover 1, and the inlet of the first fan 2 is connected to the external environment. The temperature sensor 14 monitors the wind turbines and other equipment inside the nacelle cover 1. When the temperature of the wind turbines and other equipment rises, the first fan 2 is activated. The operation of the first fan 2 introduces cooling gas into the nacelle cover 1 to dissipate heat and cool the wind turbines and other equipment. A first straight pipe 3 is fixedly connected to the inner wall of the nacelle cover 1. The first straight pipe 3 is interconnected with the air outlet of the first fan 2. Several first desiccant 4s are disposed within the first straight pipe 3. The first desiccant 4s perform the first drying of the cooling gas entering the first straight pipe 3. The number of first desiccant 4s can be set to 1, 2, 3, or more. An arc-shaped pipe 5 is connected to the end of the first straight pipe 3 away from the first fan 2 (which can be understood as the upper end). A second straight pipe 6 is connected to the free end of the arc-shaped pipe 5 (which can be understood as the right end). Several second desiccant 7s are disposed within the second straight pipe 6. The second desiccant 7s perform a second drying of the cooling gas entering the second straight pipe 6. The number of second desiccant 7s can be set to 1, 2, 3, or more. It is worth noting that in one example, the first straight pipe 3, the arc-shaped pipe 5, and the second straight pipe 6 are integrally formed.

[0019] In one implementation, such as Figure 2 and Figure 3 As shown, a filter screen 8 is installed inside the first straight pipe 3 and / or the arc-shaped pipe 5 and / or the second straight pipe 6. A humidity sensor 9 is installed on the filter screen 8, located between the first desiccant 4 and the second desiccant 7. The humidity sensor 9 is used to sense the humidity of the cooling air after passing through the first desiccant 4. In this example, the humidity sensor 9 is used to monitor the humidity of the cooling gas after passing through the first desiccant 4 in real time, so as to better monitor the humidity of the cooling gas entering the cabin cover 1. In one example, a humidity sensor 9 is installed in each of the first straight pipe 3, the arc-shaped pipe 5, and the second straight pipe 6. In another example, a humidity sensor 9 is installed in two of the first straight pipe 3, the arc-shaped pipe 5, and the second straight pipe 6. In a third example, a humidity sensor 9 is installed in all three of the first straight pipe 3, the arc-shaped pipe 5, and the second straight pipe 6.

[0020] After prolonged dehumidification, the first desiccant 4 will gradually accumulate moisture inside. As dehumidification continues, the accumulation of moisture within the first desiccant 4 will reduce its drying effect, or even prevent it from achieving the desired drying effect. To solve this problem, in one embodiment, such as... Figure 4 and Figure 5 As shown, the ventilation and heat dissipation structure of the wind turbine nacelle also includes a dehumidification mechanism 10. When the humidity sensor 9 detects that the humidity of the cooling air after passing through the first desiccant 4 is greater than a preset threshold, the dehumidification mechanism 10 starts to dehumidify the first desiccant 4. The dehumidification mechanism 10 includes a first horn-shaped pipe 101 fixedly inserted into the first straight pipe 3. The first horn-shaped pipe 101 is connected to the inner cavity of the first straight pipe 3. A third straight pipe 102 is connected to the end of the first horn-shaped pipe 101 away from the first straight pipe 3 (which can be understood as the left end). The third straight pipe 102 is fixedly inserted into the side plate of the nacelle cover 1. A suction machine 103 is installed inside the third straight pipe 102.

[0021] During operation, when the humidity sensor 9 detects that the moisture content in the cooling gas is high and the humidity exceeds a preset threshold, the humidity sensor 9 will control the suction machine 103 to start. The start of the suction machine 103 will extract the moisture in the first desiccant 4, thereby ensuring that the first desiccant 4 maintains a good drying effect at all times. When the humidity sensor 9 detects that the moisture content in the cooling gas is low and the humidity is below the preset threshold, it will control the suction machine 103 to stop working. In this way, the suction machine 103 does not need to be in a working state all the time, thereby achieving the effect of energy saving and consumption reduction.

[0022] In order to achieve a better effect in removing moisture from the first desiccant 4, in one embodiment, such as Figure 5 As shown, the ventilation and heat dissipation structure of the wind turbine nacelle also includes an isolation mechanism 11. When the dehumidification mechanism 10 dehumidifies the first desiccant 4, the isolation mechanism 11 is used to seal and surround the first desiccant 4. The isolation mechanism 11 includes a support cylinder 111, with isolation plates 112 fixedly connected to both the upper and lower ends of the support cylinder 111. Both isolation plates 112 are movably inserted into the first straight pipe 3. The two isolation plates 112 are respectively positioned above and below several of the first desiccant 4 particles. This arrangement allows for sealing of all of the first desiccant 4 particles during sealing. A cylinder arm 113 is fixedly installed on the outer wall of the support cylinder 111. The free end of the cylinder arm 113 is fixedly connected to the driving end of a drive cylinder 114, which is fixedly installed on the outer wall of the second straight pipe 6.

[0023] During operation, when the humidity sensor 9 controls the suction machine 103 to work, it also activates the drive cylinder 114. The operation of the drive cylinder 114 drives the cylinder arm 113 to move to the left. The leftward movement of the cylinder arm 113 will cause the isolation plate 112 to move to the left through the support cylinder 111. When the left end of the isolation plate 112 contacts the inner wall of the first straight pipe 3, the two isolation plates 112 block the several first desiccant 4 between them. At this time, it can prevent the moisture in the first desiccant 4 from entering the engine compartment 1 with the cooling gas, and it can also prevent the humid air outside the engine compartment 1 from entering the first desiccant 4. This can keep the water volume in the suction machine 103 constant. When the suction machine 103 performs dehumidification, it can achieve a rapid dehumidification effect and can extract the moisture in the first desiccant 4 more cleanly and thoroughly. When the suction machine 103 can no longer extract moisture, the drive cylinder 114 drives the isolation plate 112 to move to the right through the cylinder arm 113 and the support cylinder 111, stopping the sealing of the first desiccant 4. At this time, the suction machine 103 stops working and the first fan 2 starts working.

[0024] In one example, when the isolation plate 112 blocks the first desiccant 4, the first fan 2 stops working; when the isolation plate 112 moves to the right and stops blocking the first desiccant 4, the first fan 2 starts working.

[0025] To more quickly remove moisture from the first desiccant 4, in one embodiment, such as... Figure 6 and Figure 7 As shown, the ventilation and heat dissipation structure of the wind turbine nacelle also includes a pressurized purging mechanism 12. The pressurized purging mechanism 12 and the dehumidification mechanism 10 are respectively located on both sides of the first desiccant 4. It can be understood that the pressurized purging mechanism 12 is located on the right side of the first desiccant 4, and the dehumidification mechanism 10 is located on the left side of the first desiccant 4. The pressurized purging mechanism 12 is used to pressurize and purge the moisture in the first desiccant 4 from the other side (which can be understood as the right side) when the dehumidification mechanism 10 dehumidifies the first desiccant 4 from one side (which can be understood as the left side). The pressurized purging mechanism 12 includes a fixed cylinder 121 fixedly inserted into the first straight pipe 3. A pressurized purging machine 122 is fixedly connected to the inner wall of the fixed cylinder 121. A ventilation hole is provided on the side plate of the fixed cylinder 121. The ventilation hole is used to connect the inner cavity of the cabin cover 1 and the inner cavity of the first straight pipe 3. The pressurized purging machine 122 draws dry gas from the inner cavity of the cabin cover 1 through the ventilation hole. In this way, when the pressurized purging machine 122 is working, it can avoid further increasing the moisture in the first desiccant 4.

[0026] During operation, the suction machine 103 works while the pressurized blower 122 also starts working. The invention has a reasonable structural design. The suction direction of the suction machine 103 is from right to left, and the blowing direction of the pressurized blower 122 is also from right to left. This combination of suction and blowing can quickly remove the moisture from the first desiccant 4.

[0027] In one implementation, such as Figure 7 As shown, a second horn-shaped pipe 123 is fixedly installed inside the fixed cylinder 121. The second horn-shaped pipe 123 has a first opening (which can be understood as a left-end opening) and a second opening (which can be understood as a right-end opening). The size of the first opening is larger than the size of the second opening. The first opening is oriented towards the pressurized purging machine 122. A sealing plug 124 is movably inserted into the second horn-shaped pipe 123 and the ventilation hole. The sealing plug 124 includes a platform section and a rectangular section. The platform section (which can be understood as a frustum-shaped structure) abuts against the inner wall of the second horn-shaped pipe 123. At this time, the sealing plug 124 is used to seal the ventilation hole. During this stage, the humidity in the first desiccant 4 is lower than a preset threshold. A first guide support assembly 125 is fixedly connected to one end of the sealing plug 124 outside the second horn-shaped pipe 123 (which can be understood as the right end). The free end (which can be understood as the right end) of the first guide support assembly 125 is fixedly connected to the inner wall of the support cylinder 111.

[0028] In the first working state, the humidity in the first desiccant 4 is lower than the preset threshold. At this time, the first fan 2 works normally and continuously inputs dry cooling gas into the nacelle cover 1. In the second working state, the humidity in the first desiccant 4 is higher than the preset threshold. At this time, the leftward movement of the support cylinder 111 will push the sealing plug 124 to move to the left relative to the fixed cylinder 121 through the first guide support assembly 125. As the sealing plug 124 disengages from the second horn-shaped pipe 123, the ventilation hole opens, and the dry gas in the nacelle cover 1 is sucked in by the pressurized blower 122 to blow the first desiccant 4 from right to left.

[0029] In one implementation, such as Figure 7As shown, the first guide support assembly 125 includes a first guide support rod 1251, a first guide support cylinder 1252, and a first guide support spring 1253. The first guide support rod 1251 is movably inserted into the first guide support cylinder 1252. The first guide support spring 1253 is wound around the outside of the first guide support rod 1251. One end of the first guide support spring 1253 is fixedly connected to the side wall of the first guide support rod 1251, and the other end is fixedly connected to the outer side wall of the first guide support cylinder 1252. The first guide support cylinder 1252 is connected to the support cylinder 111, and the first guide support rod 1251 is connected to the sealing plug 124. The first guide support assembly 125 can both support the movement of the sealing plug 124, allowing the sealing plug 124 to move only in the horizontal direction, and provide a restoring force for the resetting movement of the sealing plug 124.

[0030] When the suction machine 103 is not in operation, in order to prevent humid air outside the cabin cover 1 from entering the first straight pipe 3 and the first desiccant 4 through the first horn-shaped pipe 101 and the third straight pipe 102, in one embodiment, such as Figure 8 As shown, the ventilation and heat dissipation of the wind turbine nacelle also includes a leak-proof mechanism 13. The leak-proof mechanism 13 includes a leak-proof plate 131 that is movably inserted into the top plate of the third straight pipe 102. The lower end of the leak-proof plate 131 is in contact with the inner bottom wall of the third straight pipe 102. The upper end of the leak-proof plate 131 is fixedly connected to a first pull rod 132. One end of a second push rod 136 is hinged to the side wall of the first pull rod 132. The other end of the second push rod 136 is hinged to a third push rod 137. The third push rod 137 is movably inserted into the first straight pipe 3, and the end of the third push rod 137 located inside the first straight pipe 3 is fixedly connected to the isolation plate 112.

[0031] When the suction machine 103 is not working, the anti-leakage plate 131 is used to seal the third straight pipe 102 to prevent humid air outside the cabin cover 1 from entering the first straight pipe 3. When the suction machine 103 is working, the drive cylinder 114 will also start to push the isolation plate 112 to the left. The leftward movement of the isolation plate 112 will push the first pull rod 132 with the anti-leakage plate 131 upward through the third push rod 137 and the second push rod 136. At this time, the third straight pipe 102 is opened, so that the moisture in the first desiccant 4 is extracted and blown out to the outside of the cabin cover 1.

[0032] In one implementation, such as Figure 9As shown, the anti-leakage mechanism 13 also includes a support slider 133, which is fixedly mounted on the side wall of the first pull rod 132. The support slider 133 is slidably mounted in the support groove 134, which is fixedly mounted on the inner side wall of the cabin cover 1. A second guide support assembly 135 is fixedly connected to the upper end surface of the support slider 133, and the upper end of the second guide support assembly 135 is fixedly connected to the side wall of the support groove 134.

[0033] In one implementation, such as Figure 9 As shown, the second guide support assembly 135 includes a second guide support rod 1351, a second guide support cylinder 1352, and a second guide support spring 1353. The second guide support rod 1351 is movably inserted into the second guide support cylinder 1352. The second guide support spring 1353 is wound around the second guide support rod 1351. One end of the second guide support spring 1353 is fixedly connected to the side wall of the second guide support rod 1351, and the other end of the second guide support spring 1353 is fixedly connected to the outer side wall of the second guide support cylinder 1352. The second guide support cylinder 1352 is connected to the support slider 133, and the second guide support rod 1351 is connected to the support groove 134.

[0034] In this embodiment, the combination structure of the support slider 133, the support groove 134, and the second guide support component 135 can both limit the movement of the first pull rod 132, ensuring that the first pull rod 132 can only move in the vertical direction, and provide a restoring force for the reset process of the first pull rod 132.

[0035] It should be understood that the first desiccant 4 and the second desiccant 7 can be solid desiccant, such as activated carbon, activated alumina, molecular sieve, silica gel, lithium chloride and calcium chloride, etc., but are not limited to solid desiccant, and may be limited to activated carbon, activated alumina, molecular sieve, silica gel, lithium chloride and calcium chloride, etc.

[0036] While embodiments of the present invention have been described in detail above, it will be apparent to those skilled in the art that various modifications and variations can be made to these embodiments. However, it should be understood that such modifications and variations fall within the scope and spirit of the present invention. Furthermore, the present invention described herein may have other embodiments and can be implemented or carried out in various ways.

Claims

1. A ventilation and heat dissipation structure for a wind turbine nacelle, characterized in that, The system includes a nacelle cover (1) and a temperature sensor (14) located inside the nacelle cover (1). A first fan (2) is fixedly inserted into the side wall of the nacelle cover (1). The air outlet of the first fan (2) is connected to the inner cavity of the nacelle cover (1). The air inlet of the first fan (2) is connected to the external environment. A first straight pipe (3) is fixedly connected to the inner side wall of the nacelle cover (1). The first straight pipe (3) is connected to the air outlet of the first fan (2). A plurality of first desiccant (4) is provided inside the first straight pipe (3). An arc-shaped pipe (5) is connected to the end of the first straight pipe (3) away from the first fan (2). A second straight pipe (6) is connected to the free end of the arc-shaped pipe (5). A plurality of second desiccant (7) is provided inside the second straight pipe (6). A filter screen (8) is provided inside the first straight pipe (3) and / or the arc pipe (5) and / or the second straight pipe (6). A humidity sensor (9) is provided on the filter screen (8). The humidity sensor (9) is located between the first desiccant (4) and the second desiccant (7). The humidity sensor (9) is used to sense the humidity of the cooling air after passing through the first desiccant (4). It also includes a dehumidification mechanism (10). When the humidity sensor (9) senses that the humidity of the cooled air after passing through the first desiccant (4) is greater than a preset threshold, the dehumidification mechanism (10) starts to dehumidify the first desiccant (4). The dehumidification mechanism (10) includes a first horn-shaped pipe (101) fixedly inserted into the first straight pipe (3). The first horn-shaped pipe (101) is connected to the inner cavity of the first straight pipe (3). A third straight pipe (102) is connected to the end of the first horn-shaped pipe (101) away from the first straight pipe (3). The third straight pipe (102) is fixedly inserted into the side plate of the cabin cover (1). A suction machine (103) is installed inside the third straight pipe (102). It also includes an isolation mechanism (11), which is used to seal and surround the first desiccant (4) when the dehumidification mechanism (10) dehumidifies the first desiccant (4). The isolation mechanism (11) includes a support cylinder (111), and the upper and lower ends of the support cylinder (111) are fixedly connected to isolation plates (112). The two isolation plates (112) are movably inserted into the first straight pipe (3). The two isolation plates (112) are respectively located above and below a plurality of the first desiccant (4). A cylinder arm (113) is fixedly provided on the outer side wall of the support cylinder (111). The free end of the cylinder arm (113) is fixedly connected to the driving end of the driving cylinder (114). The driving cylinder (114) is fixedly provided on the outer side wall of the second straight pipe (6). It also includes a pressurized purging mechanism (12), which and the dehumidification mechanism (10) are respectively located on both sides of the first desiccant (4). The pressurized purging mechanism (12) is used to pressurize and purge the moisture in the first desiccant (4) from the other side when the dehumidification mechanism (10) dehumidifies the first desiccant (4) from one side. The pressurized purging mechanism (12) includes a fixed cylinder (121) fixedly inserted into the first straight pipe (3). A pressurized purging machine (122) is fixedly connected to the inner wall of the fixed cylinder (121). A ventilation hole is opened on the side plate of the fixed cylinder (121). The ventilation hole is used to connect the inner cavity of the cabin cover (1) and the inner cavity of the first straight pipe (3). While the suction machine (103) is working, the booster blower (122) will also start working.

2. The ventilation and heat dissipation structure for a wind turbine nacelle according to claim 1, characterized in that, A second horn-shaped pipe (123) is fixedly installed inside the fixed cylinder (121). The second horn-shaped pipe (123) has a first opening and a second opening. The size of the first opening is larger than the size of the second opening. The first opening is oriented toward the booster blower (122). A sealing plug (124) is movably inserted into the second horn-shaped pipe (123) and the ventilation hole. The sealing plug (124) includes a platform section and a rectangular section. The platform section abuts against the inner wall of the second horn-shaped pipe (123). A first guide support assembly (125) is fixedly connected to one end of the sealing plug (124) outside the second horn-shaped pipe (123). The free end of the first guide support assembly (125) is fixedly connected to the inner wall of the support cylinder (111).

3. The ventilation and heat dissipation structure for wind turbine nacelles according to claim 2, characterized in that, The first guide support assembly (125) includes a first guide support rod (1251), a first guide support cylinder (1252), and a first guide support spring (1253). The first guide support rod (1251) is movably inserted into the first guide support cylinder (1252). The first guide support spring (1253) is wound around the outside of the first guide support rod (1251). One end of the first guide support spring (1253) is fixedly connected to the side wall of the first guide support rod (1251), and the other end of the first guide support spring (1253) is fixedly connected to the outer side wall of the first guide support cylinder (1252). The first guide support cylinder (1252) is connected to the support cylinder (111), and the first guide support rod (1251) is connected to the sealing plug (124).

4. The ventilation and heat dissipation structure for wind turbine nacelles according to claim 1, characterized in that, It also includes a leak-proof mechanism (13), which includes a leak-proof plate (131) that is movably inserted into the top plate of the third straight pipe (102). The lower end of the leak-proof plate (131) is in contact with the inner bottom wall of the third straight pipe (102). The upper end of the leak-proof plate (131) is fixedly connected to a first pull rod (132). The side wall of the first pull rod (132) is hinged to one end of a second push rod (136). The other end of the second push rod (136) is hinged to a third push rod (137). The third push rod (137) is movably inserted into the first straight pipe (3), and the end of the third push rod (137) located inside the first straight pipe (3) is fixedly connected to the isolation plate (112).

5. The ventilation and heat dissipation structure for a wind turbine nacelle according to claim 4, characterized in that, The anti-leakage mechanism (13) further includes a support slider (133), which is fixedly mounted on the side wall of the first pull rod (132). The support slider (133) is slidably mounted in the support groove (134), which is fixedly mounted on the inner side wall of the cabin cover (1). A second guide support assembly (135) is fixedly connected to the upper end surface of the support slider (133), and the upper end of the second guide support assembly (135) is fixedly connected to the side wall of the support groove (134).

6. The ventilation and heat dissipation structure for a wind turbine nacelle according to claim 5, characterized in that, The second guide support assembly (135) includes a second guide support rod (1351), a second guide support cylinder (1352), and a second guide support spring (1353). The second guide support rod (1351) is movably inserted into the second guide support cylinder (1352). The second guide support spring (1353) is wound around the outside of the second guide support rod (1351). One end of the second guide support spring (1353) is fixedly connected to the side wall of the second guide support rod (1351), and the other end of the second guide support spring (1353) is fixedly connected to the outer side wall of the second guide support cylinder (1352). The second guide support cylinder (1352) is connected to the support slider (133), and the second guide support rod (1351) is connected to the support groove (134).

Images