High-efficiency heat dissipation structure for wind power generator

Abstract

The application belongs to the technical field of wind power generation heat dissipation, and specifically relates to a high-efficiency heat dissipation structure for a wind driven generator, which comprises an outer shell, a generator arranged in the end of the outer shell, a plurality of evaporation pipes arranged on the outer side of the generator, an expansion valve connected to one end of each evaporation pipe, a condensation pipe connected to the end of each expansion valve away from the evaporation pipe and extending out of the outer shell, a high-pressure pipe connected to the end of each condensation pipe away from the expansion valve and arranged on the inner wall of the outer shell, a compressor component arranged between the evaporation pipe and the end of the high-pressure pipe, a refrigerant filled in the evaporation pipe, the condensation pipe and the high-pressure pipe, a transmission shaft arranged in the outer shell and connected to the power input end of the generator through a shaft coupling, a bottom plate arranged at the bottom of the outer shell, a generator support arranged on the bottom plate and used for supporting the generator, a compressor support arranged on the bottom plate and used for supporting the compressor component, and the compressor component and the transmission shaft are optionally connected in power.

Description

Technical Field

[0001] This invention belongs to the field of wind power generation heat dissipation technology, specifically a high-efficiency heat dissipation structure for wind turbine generators. Background Technology

[0002] During the wind turbine's rotation to generate electricity, components such as the generator windings, magnets, and bearings continuously generate heat loss. The enclosed space and limited air circulation within the nacelle mean that if this heat cannot be dissipated in time, it can lead to aging of the winding insulation, demagnetization of permanent magnets at high temperatures, and bearing lubrication failure, significantly shortening the turbine's lifespan and reducing operational stability. Existing wind turbine cooling solutions mainly fall into two categories: forced air cooling within the nacelle and external circulating liquid cooling. Both solutions have inherent technical shortcomings in terms of energy supply, heat dissipation efficiency, overall load, operational adaptability, vibration suppression, and sustained heat dissipation under low wind speed conditions. They are ill-suited to the complex and variable wind speed conditions encountered in the field. Specific deficiencies are as follows: 1. Traditional air-cooled heat dissipation solutions for engine compartments rely on independent motors to drive circulating fans. They only rely on air convection between the inside and outside of the engine compartment to remove heat. The air heat transfer coefficient is low, and the targeted heat dissipation capacity of the generator body heat source is weak. The cooling effect is insufficient under high temperature conditions. The fan needs to be equipped with an independent power supply circuit, which consumes additional generator power and causes energy loss.

[0003] 2. Although conventional external liquid cooling systems have better heat exchange efficiency than air cooling, they require large water tanks, high-pressure water pumps, and long-distance water supply pipelines. The entire cooling system is heavy, which significantly increases the load on the nacelle and tower, and raises the design and manufacturing costs of the tower and nacelle structures. At the same time, the tower is relatively tall, and there are hidden dangers such as leakage, pipe freezing, and insufficient water pressure in the high-pressure water supply. Field operation and maintenance is difficult, and it is impossible to achieve lightweight, waterless independent circulation cooling.

[0004] 3. Outdoor natural wind speeds are intermittent and fluctuate. During gusts and low wind speed periods, the blade drive shaft speed drops sharply. The existing main shaft direct-drive compressor slows down synchronously with the drive shaft, the refrigerant circulation flow rate decreases sharply, and the generator's heat dissipation capacity drops significantly. The heat generation rate is greater than the heat dissipation rate, and the temperature inside the nacelle rises rapidly. Conventional heat dissipation structures do not have kinetic energy storage buffer mechanisms, so they cannot maintain stable compressor operation during wind speed fluctuations. Heat dissipation is insufficient in low wind speed ranges, and high-temperature failures of the unit occur frequently. Summary of the Invention

[0005] To overcome the shortcomings of existing technologies, this invention addresses the technical problem by incorporating a compressor component that can be powered by a drive shaft. This compressor, along with an evaporator, expansion valve, condenser, and high-pressure pipe, circulates and injects refrigerant, effectively absorbing the high temperature generated at the generator and transferring it to the condenser. The heat is then directly carried away by the airflow outside the outer casing, achieving highly efficient cooling of the generator. Furthermore, the energy for heat dissipation comes directly from the rotation of the wind turbine blades, eliminating the need for additional drive components. This solution perfectly suits the operating conditions of wind turbines: when there is wind, the generator operates and generates heat, and at this time, the compressor is also driven by the blade assembly, thus performing cooling. Simultaneously, there is always airflow outside the outer casing flowing through the condenser, effectively dissipating heat from the condenser. When there is no wind, the generator does not operate, the compressor component does not need to run, and there is no need to dissipate heat from the condenser. Compared to traditional methods that only involve installing a circulating fan inside the outer casing or introducing external airflow, this solution is more efficient and more effective. This solution specifically targets the generator for cooling. Compared to liquid cooling, this solution creates an independent circulation system inside and outside the outer casing, eliminating the need for an additional water tank or water supply system. This significantly reduces the weight burden on the outer casing and avoids the problem of high-pressure pumps pumping water into the high-level outer casing. The solution uses multiple compression sleeves and pistons arranged circumferentially outside the drive shaft, ensuring the array center of the compression sleeves, the compressor housing, and the drive shaft are coaxial. This effectively avoids occupying too much space while meeting power requirements. The uniform circumferential array arrangement effectively balances the vibrations generated by the compression sleeves and pistons during operation. By incorporating flywheel sleeves and a flywheel, a flywheel energy storage structure is formed. When the drive shaft rotates at high speed, it drives the flywheel to rotate at high speed to store kinetic energy. When the drive shaft speed decreases, the electromagnetic clutch disengages, and the flywheel's rotational inertia continues to drive the eccentric disc to rotate, thereby driving the compressor components to continue operating efficiently and ensuring effective cooling of the generator.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a high-efficiency heat dissipation structure for a wind turbine generator, comprising: an outer casing, a generator disposed inside the end of the outer casing, a plurality of evaporator tubes covering the outside of the generator, an expansion valve connected to one end of each evaporator tube, a condenser tube extending outward from the outer casing connected to the end of each expansion valve away from the evaporator tube, a high-pressure tube located on the inner wall of the outer casing connected to the end of each condenser tube away from the expansion valve, a compressor component disposed between the ends of the evaporator tubes and the high-pressure tubes, and refrigerant filled in the evaporator tubes, condenser tubes and high-pressure tubes; The outer casing contains a drive shaft, which is connected to the power input end of the generator via a coupling. The bottom of the outer casing contains a base plate, on which a generator bracket for supporting the generator and a compressor bracket for supporting the compressor components are respectively provided. The compressor components are optionally connected to the drive shaft.

[0007] Furthermore, multiple sets of evaporator tubes are spirally wound around the outside of the generator, with uniform pitch between each evaporator tube. The corresponding condenser tubes of each evaporator tube are also evenly distributed on the outside of the outer casing. A set of tube seats is provided on the inner wall of the outer casing at the position corresponding to each high-pressure tube, and each set of tube seats is fixedly connected to the corresponding high-pressure tube.

[0008] Furthermore, a flow guide is provided on the outer side of the outer casing at the corresponding position of each group of condenser tubes to shield the condenser tubes. The flow guide and the outer surface of the outer casing form an airflow channel in a straight line. The condenser tubes are arranged in an S-shape, meandering and coiling within the airflow channel formed by each flow guide. A condenser tube rack is provided inside the flow guide to support and fix the condenser tubes.

[0009] Furthermore, the compressor component includes a compressor housing, and multiple compression sleeves are evenly distributed on the outer side of the compressor housing in a circumferential direction. The compressor housing and the compression sleeves are coaxially arranged with the drive shaft. A piston is slidably arranged in each compression sleeve along the axial direction. An inlet check valve and an outlet check valve are respectively provided on the top of each compression sleeve. The inlet check valve and the outlet check valve are respectively connected to the evaporator pipe and the high-pressure pipe.

[0010] Furthermore, the drive shaft passes through the center of the compressor housing and is connected to the generator. Each compression sleeve is fixedly connected to the compressor housing through a fixed sleeve. The compression sleeve is alternatively disposed within the fixed sleeve. The bottom of the compressor housing is fixedly connected to the compressor bracket.

[0011] Furthermore, an eccentric disk is rotatably disposed inside the compressor housing. The eccentric disk is eccentrically disposed relative to the transmission shaft and rotatably sleeved on the outside of the transmission shaft. A main connecting rod is rotatably disposed on the edge of the eccentric disk. The top end of the main connecting rod is hinged to one of the pistons. Sub-connecting rods are respectively hinged to the edges of the main connecting rod at the corresponding positions of the other pistons. Each sub-connecting rod is hinged to the corresponding piston.

[0012] Furthermore, a flywheel sleeve is rotatably connected to one end of the drive shaft extending out of the compressor housing. Multiple flywheels are sleeved and fixedly mounted on the outside of the flywheel sleeve, and the flywheel sleeve is connected to the eccentric disc via a transmission connection.

[0013] Furthermore, a connecting flange is fitted onto one end of the eccentric disc outside the drive shaft. The connecting flange is rotatably fitted onto the outside of the drive shaft and fixedly connected to the end of the flywheel sleeve. The connecting flange and the contact surface of the eccentric disc are fixedly connected by a plurality of evenly arranged connecting pins.

[0014] Furthermore, an electromagnetic clutch is fixedly connected to the end of the flywheel sleeve extending from the flywheel, and the electromagnetic clutch can optionally be powered to the drive shaft.

[0015] Furthermore, a counterweight hole is provided at a specific position on the flywheel, and a weight reduction hole is provided on the disc-shaped body of the eccentric disk.

[0016] In summary, compared with the prior art, the beneficial effects of the present invention are as follows: (1) By setting up a compressor component that can be connected to the drive shaft, and cooperating with the evaporator, expansion valve, condenser and high pressure pipe to circulate and inject refrigerant, the high temperature generated at the generator is effectively absorbed and transferred to the condenser. The heat is carried away directly by the airflow outside the outer casing, thus achieving a high-efficiency cooling effect at the generator. The heat dissipation energy comes directly from the rotation of the wind turbine blades, without the need for additional drive configuration.

[0017] (2) This solution is well suited to the working conditions of wind turbine generators. When there is wind, the generator works and generates heat. At the same time, the compressor is also driven by the blade assembly to work and cool down. At this time, there must be airflow flowing through the condenser tube outside the outer casing, which dissipates heat from the condenser tube in time. When there is no wind, the generator does not work, the compressor components do not need to run, and there is no need to dissipate heat from the condenser tube.

[0018] (3) Compared with the traditional method of simply setting up a circulating fan inside the outer casing or introducing external airflow, this solution is more efficient and targeted in cooling the generator. Compared with the liquid cooling method, this solution forms an independent circulation system inside and outside the outer casing, without the need to set up an additional water tank or water supply system, which greatly reduces the weight burden on the outer casing and eliminates the need to set up a water supply system, thus overcoming the problem of high-pressure pumps being pumped into the high outer casing.

[0019] (4) This scheme uses multiple compression sleeves and pistons arranged in a circumferential direction on the outside of the transmission shaft, and makes the array center of the compression sleeves and the compressor housing and the transmission shaft coaxial. This achieves the goal of meeting power requirements while effectively avoiding occupying too much space. The uniform circumferential array arrangement effectively balances the vibration generated by the compression sleeves and pistons during operation.

[0020] (5) By setting up a flywheel sleeve and a flywheel to form a flywheel energy storage structure, when the drive shaft rotates at high speed, the flywheel is driven to rotate at high speed to store kinetic energy. When the speed of the drive shaft decreases, the electromagnetic clutch is disengaged. The rotational inertia of the flywheel is used to continue to drive the eccentric disk to rotate, thereby driving the compressor components to continue to operate efficiently and ensuring the heat dissipation and cooling effect on the generator. Attached Figure Description

[0021] Figure 1 This is a three-dimensional schematic diagram of the present patent.

[0022] Figure 2 This is a front view of the patent.

[0023] Figure 3 for Figure 2 A three-dimensional sectional view at point AA.

[0024] Figure 4 for Figure 3 A magnified view of a section at point B.

[0025] Figure 5 for Figure 3 A magnified view of a section at point C.

[0026] Figure 6 This is a schematic diagram of the main structure of this patent.

[0027] Figure 7 This is a structural diagram of the compressor component.

[0028] Figure 8 A structural diagram of the main connecting rod.

[0029] Explanation of reference numerals in the attached drawings: Outer casing 10; Base plate 11; Generator bracket 12; Generator 13; Evaporator pipe 14; Expansion valve 15; Condensate pipe 16; Condensate pipe rack 17; High-pressure pipe 18; Inlet check valve 19; Outlet check valve 20; Compression sleeve 21; Fixed sleeve 22; Piston 23; Main connecting rod 24; Secondary connecting rod 25; Eccentric disc 26; Drive shaft 27; Compressor housing 28; Connecting pin 29; Connecting flange 30; Flywheel sleeve 31; Flywheel 32; Counterweight hole 33; Electromagnetic clutch 34; Flow guide shroud 35; Compressor bracket 36; Pipe seat 37; Coupling 38; Weight reduction hole 39. Detailed Implementation

[0030] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0031] like Figure 1-8As shown, a high-efficiency heat dissipation structure for a wind turbine includes an outer casing 10, a base plate 11 inside the refrigerant outer casing 10, a generator bracket 12 on the refrigerant base plate 11 at the end of the outer casing 10, a generator 13 on the refrigerant generator bracket 12, a wind turbine blade assembly and a gearbox on the front end of the refrigerant outer casing 10, a drive shaft 27 inside the refrigerant outer casing 10 for transmitting the rotational power of the blade assembly, and a coupling 38 connecting the refrigerant drive shaft 27 and the power input end of the generator 13.

[0032] like Figure 1-8 As shown, a compressor bracket 36 is provided on the refrigerant base plate 11, and a compressor component is fixedly installed on the refrigerant compressor bracket 36. Three evaporator pipes 14 are evenly distributed and covered on the outside of the refrigerant generator 13. One end of each refrigerant evaporator pipe 14 is connected to an expansion valve 15. The end of the refrigerant expansion valve 15 away from the evaporator pipe 14 is connected to a condenser pipe 16 extending out of the outer casing 10. The end of the refrigerant condenser pipe 16 away from the expansion valve 15 is connected to a high-pressure pipe 18. The ends of the refrigerant high-pressure pipe 18 and the evaporator pipe 14 are connected to the compressor component. The refrigerant evaporator pipe 14, condenser pipe 16 and high-pressure pipe 18 are filled with refrigerant. The refrigerant compressor component is optionally powered by the drive shaft 27.

[0033] By setting up a drive shaft 27, the power of the wind turbine blade assembly rotation is transmitted to the generator 13, thereby converting wind kinetic energy into electrical energy to achieve wind power generation. During this process, the generator 13 will generate high temperature. By setting up a compressor component that can be powered by the drive shaft 27, and cooperating with the evaporator pipe 14, expansion valve 15, condenser pipe 16 and high pressure pipe 18 to circulate and inject refrigerant, the high temperature generated at the generator 13 is effectively absorbed and transferred to the condenser pipe 16. The heat is directly carried away by the airflow outside the outer casing 10, thus achieving a highly efficient cooling effect at the generator 13.

[0034] Compared with the traditional method of simply installing a circulating fan inside the outer casing 10 or introducing external airflow, the evaporator pipe 14 of this scheme can absorb a large amount of heat and quickly absorb the high temperature generated by the generator 13 in a timely manner, thus cooling the generator 13 more efficiently and in a more targeted manner, resulting in better cooling effect and higher heat dissipation efficiency.

[0035] Meanwhile, compared with liquid cooling circulation or evaporative heat exchange, this solution forms an independent circulation system inside and outside the outer casing 10. At the same time, its load is small, and there is no need to set up an additional water tank or water supply system, which greatly reduces the weight burden on the outer casing 10. It also avoids the problem of setting up a water supply system like water cooling, which uses a water pump at the bottom of the wind turbine to supply water, but it is difficult to overcome the problem of high-pressure pumps delivering water to the high-altitude outer casing 10.

[0036] Furthermore, the cooling method adopted in this solution uses the rotational kinetic energy of the wind turbine blade assembly directly, without the need for additional drive components. The heat dissipation at the condenser pipe 16 also comes directly from the external airflow, without the need for additional cooling fans.

[0037] Furthermore, this solution is perfectly suited to the working conditions of wind turbines. When there is wind, the generator 13 works and generates heat, and at the same time, the compressor is also driven by the blade assembly to work and cool down. At this time, there is an airflow outside the outer casing 10 that flows through the condenser pipe 16, which dissipates heat from the condenser pipe 16 in time. When there is no wind, the generator 13 does not work, the compressor components do not need to operate, and there is no need to dissipate heat from the condenser pipe 16.

[0038] like Figure 1-8 As shown, multiple sets of refrigerant evaporator pipes 14 are spirally wound around the outside of the generator 13, with uniform pitch between each refrigerant evaporator pipe 14. The corresponding condenser pipes 16 of each refrigerant evaporator pipe 14 are also evenly distributed on the outside of the outer casing 10. A set of pipe seats 37 is provided on the inner wall of the refrigerant outer casing 10 at the corresponding position of each high-pressure pipe 18. Each set of refrigerant pipe seats 37 is fixedly connected to the corresponding high-pressure pipe 18. A guide shroud 35 is provided on the outside of the outer casing 10 at the corresponding position of each set of condenser pipes 16 to shield the condenser pipes 16. The refrigerant guide shroud 35 and the outer surface of the outer casing 10 form an airflow channel in a straight line. The refrigerant condenser pipes 16 are generally S-shaped and meandering around in the airflow channel formed by each guide shroud 35. A condenser pipe bracket 17 is provided inside the refrigerant guide shroud 35 to support and fix the condenser pipes 16.

[0039] The spiral shape of the evaporator tubes 14 and the evenly spaced arrangement of multiple sets of evaporator tubes 14 ensure that each evaporator tube 14 can be evenly wrapped around the outside of the generator 13. This means that even if one evaporator tube 14 experiences leakage or blockage, the other normally functioning evaporator tubes 14 can still effectively and evenly cool and dissipate heat for the entire generator 13. This redundant design ensures that the cooling operation is safe, stable, and continuous.

[0040] By setting the flow guide shroud 35, the structure of the condenser tube 16 can be shielded and protected. Furthermore, an airflow channel is formed between the flow guide shroud 35 and the outer casing 10, allowing the airflow to concentrate on blowing the condenser tube 16. Combined with the meandering arrangement of the condenser tube 16, the contact area and contact time between the condenser tube 16 and the airflow are increased, thereby removing the heat of the high-pressure and condensed refrigerant in the condenser tube 16. This indirectly improves the heat absorption and cooling effect of the evaporator tube 14 on the generator 13.

[0041] like Figure 1-8As shown, the refrigerant compressor component includes a compressor housing 28. Multiple compression sleeves 21 are evenly distributed circumferentially on the outer side of the refrigerant compressor housing 28. The refrigerant compressor housing 28 and the compression sleeves 21 are coaxially arranged with the drive shaft 27. A piston 23 is slidably arranged axially inside each refrigerant compression sleeve 21. An inlet check valve 19 and an outlet check valve 20 are respectively provided on the top of each refrigerant compression sleeve 21. The refrigerant inlet check valve 19 and the outlet check valve 20 are respectively connected to the evaporator pipe 14 and the high-pressure pipe 18. The refrigerant drive shaft 27 passes through the center of the compressor housing 28 and is connected to the generator 13. Each refrigerant compression sleeve 21 is fixedly connected to the compressor housing 28 through a fixing sleeve 22. The refrigerant compression sleeve 21 is replaceably arranged in the fixing sleeve 22. The bottom of the refrigerant compressor housing 28 is fixedly connected to the compressor bracket 36.

[0042] like Figure 1-8 As shown, an eccentric disk 26 is rotatably disposed inside the refrigerant compressor housing 28. The refrigerant eccentric disk 26 is eccentrically disposed relative to the drive shaft 27 and rotatably sleeved on the outside of the drive shaft 27. A main connecting rod 24 is rotatably disposed on the edge of the refrigerant eccentric disk 26. The top end of the refrigerant main connecting rod 24 is hinged to one of the pistons 23. A secondary connecting rod 25 is hinged to the edge of the refrigerant main connecting rod 24 at the corresponding positions of the other pistons 23. Each refrigerant secondary connecting rod 25 is hinged to the corresponding piston 23.

[0043] In order to meet the requirements of rapid absorption and efficient cooling of the large amount of heat from the generator 13, and to cooperate with the redundant design of multiple evaporator tubes 14, each evaporator tube 14 is equipped with a structure capable of compressing the refrigerant to meet its working power requirements. However, the space inside the outer casing 10 is limited, and it would take up a lot of space to independently set up multiple structures for compressing the refrigerant on one side of the generator 13.

[0044] This solution uses multiple compression sleeves 21 and pistons 23 arranged circumferentially on the outside of the drive shaft 27, so that the array center of the compression sleeves 21 and the compressor housing 28 are coaxial with the drive shaft 27. This achieves the goal of meeting power requirements while effectively avoiding excessive space occupation. The uniform circumferential array arrangement effectively balances the vibration generated by the compression sleeves 21 and pistons 23 during operation.

[0045] By setting up the main connecting rod 24, the secondary connecting rod 25, and the eccentric disk 26, the eccentric rotation of the eccentric disk 26 can drive the three pistons 23 to alternately perform piston movements. This allows only one set of drive structures to drive three sets of compression structures to work simultaneously, further saving space and effectively improving work efficiency.

[0046] A flywheel sleeve 31 is rotatably connected to one end of the refrigerant drive shaft 27 extending out of the compressor housing 28. Multiple flywheels 32 are fitted and fixedly installed on the outside of the refrigerant flywheel sleeve 31. A connecting flange 30 is fitted to one end of the refrigerant eccentric disc 26 on the outside of the drive shaft 27. The refrigerant connecting flange 30 is rotatably fitted on the outside of the drive shaft 27 and fixedly connected to the end of the flywheel sleeve 31. The contact surfaces of the refrigerant connecting flange 30 and the eccentric disc 26 are fixedly connected by multiple evenly arranged connecting pins 29. An electromagnetic clutch 34 is fixedly connected to the end of the refrigerant flywheel sleeve 31 extending out of the flywheel 32. The refrigerant electromagnetic clutch 34 can be optionally powered by the drive shaft 27. A counterweight hole 33 is opened at a specific position on the refrigerant flywheel 32. A weight reduction hole 39 is opened on the disc-shaped body of the refrigerant eccentric disc 26.

[0047] By setting up an electromagnetic clutch 34, a flywheel sleeve 31, and a connecting flange 30, the state of whether or not power is transmitted between the eccentric disc 26 and the drive shaft 27 can be switched by controlling the electromagnetic clutch 34. When the wind turbine blade assembly rotates at low speed and the heat generated by the generator 13 is within an acceptable range, the connection between the eccentric disc 26 and the drive shaft 27 can be disconnected, so there is no need to start the cooling and heat dissipation work, which also saves the service life of the compressor components.

[0048] When the generator 13 generates a large amount of heat and needs to be cooled, the electromagnetic clutch 34 is controlled to make the eccentric disk 26 and the drive shaft 27 connected. Due to the characteristics of the electromagnetic clutch 34, the eccentric disk 26 and the drive shaft 27 are not directly rigidly connected. Instead, the friction force of the electromagnetic clutch 34 is used to gradually drive the eccentric disk 26 to rotate until the rotation speed of the eccentric disk 26 is consistent with that of the drive shaft 27. This allows the cooling operation to be started at any time without being subject to special starting conditions, and the generator 13 can be cooled in a timely manner.

[0049] As the external wind decreases and the impeller gradually reduces its speed until it stops, the generator 13 will still generate heat, and its temperature will not drop rapidly. However, as the speed of the drive shaft 27 decreases, it becomes difficult for the compressor components to maintain good working efficiency.

[0050] By setting up flywheel sleeve 31 and flywheel 32 to form a flywheel energy storage structure, when the drive shaft 27 rotates at high speed, it drives the flywheel 32 to rotate at high speed to store kinetic energy. When the speed of the drive shaft 27 decreases, the electromagnetic clutch 34 is disengaged, and the rotational inertia of the flywheel 32 is used to continue to drive the eccentric disk 26 to rotate, thereby driving the compressor components to continue to operate efficiently and ensuring the heat dissipation and cooling effect on the generator 13.

[0051] Furthermore, the setting of counterweight hole 33 and weight reduction hole 39 can play a role in dynamic balancing of flywheel 32 and eccentric disk 26 during operation, reducing their vibration during rotation and improving operational stability.

[0052] In this embodiment, initially, the operator sets up a temperature monitoring system and a control system inside the outer casing 10, and connects the electromagnetic clutch 34 to the control system. During operation, the blades of the wind turbine rotate, which in turn drives the drive shaft 27 to rotate. The drive shaft 27 directly transmits power to the generator 13 to generate electricity.

[0053] Meanwhile, when the temperature monitoring system detects that the temperature inside the outer casing 10 is too high or the temperature of the generator 13 itself is too high, the control system sends a signal and controls the electromagnetic clutch 34, causing the transmission shaft 27 to drive the flywheel sleeve 31 and the eccentric disk 26 to rotate. The rotation of the flywheel sleeve 31 drives the flywheel 32 to rotate at high speed to store power. The eccentric disk 26 rotates eccentrically, which drives the main connecting rod 24 and the secondary connecting rod 25 to oscillate periodically, thereby driving each piston 23 to perform piston movement in its corresponding compression sleeve 21.

[0054] Due to the installation of the inlet check valve 19 and the outlet check valve 20, when each piston 23 slides towards the direction relative to the drive shaft 27, the top space volume of the compression sleeve 21 increases, drawing the refrigerant in the evaporator tube 14 into the compression sleeve 21 through the inlet check valve 19. Conversely, when the piston 23 slides away from the drive shaft 27, the top space volume of the compression sleeve 21 decreases, and the refrigerant is pressurized and enters the high-pressure pipe 18 through the outlet check valve 20.

[0055] The refrigerant entering the high-pressure pipe 18 has a high pressure and generates a high temperature due to compression. When the high-pressure and high-temperature refrigerant in the high-pressure pipe 18 flows into the condenser pipe 16, the external airflow also enters the guide shroud 35 to blow the condenser pipe 16, thus continuously cooling the high-pressure and high-temperature refrigerant in the condenser pipe 16. The refrigerant is in a high-pressure state and has a low boiling point. After being cooled by the airflow, it condenses into a liquid and continues to flow towards the expansion valve 15.

[0056] After the high-pressure liquid refrigerant is depressurized through the expansion valve 15, it is sprayed into the evaporator tube 14. The refrigerant vaporizes and absorbs heat efficiently in the evaporator tube 14, so the evaporator tube 14 can quickly absorb the huge amount of heat generated by the generator 13. Then the refrigerant re-enters the compression sleeve 21 and is compressed. This cycle is repeated to achieve efficient cooling of the generator 13.

[0057] As the blade assembly gradually decelerates until it stops, the speed of the drive shaft 27 decreases, making it difficult for the drive shaft 27 to supply the compressor components with appropriate power. At this time, the control electromagnetic clutch 34 disconnects the power connection between the eccentric disk 26 and the drive shaft 27, while the flywheel 32 stores power and continues to drive the eccentric disk 26 to run at a relatively stable speed due to its rotational inertia, thus continuing to drive the compressor to work and perform cooling.

[0058] When the power stored in the flywheel 32 is no longer enough to drive the eccentric disk 26 to continue working at a suitable power, the drive shaft 27 basically stops rotating. At this time, the control electromagnetic clutch 34 is re-engaged, and the friction of the electromagnetic clutch 34 is used to brake the rotation of the flywheel 32 and the eccentric disk 26, so as to avoid them doing useless work and wasting their service life.

[0059] The generator 13, expansion valve 15, inlet check valve 19, outlet check valve 20 and electromagnetic clutch 34 mentioned above are mature existing technologies. The structures in the attached drawings are only schematic diagrams, and their specific structures and working principles will not be described in detail in this article.

[0060] The specification and claims use certain terms to refer to specific components. Those skilled in the art will understand that hardware manufacturers may use different names to refer to the same component. This specification and claims do not distinguish components based on differences in name, but rather on differences in function. The term "comprising" throughout the specification and claims is an open-ended term and should be interpreted as "comprising but not limited to." "Approximately" means that within an acceptable margin of error, those skilled in the art can solve the technical problem and substantially achieve the technical effect within a certain margin of error.

[0061] It should be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a product or system comprising a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a product or system. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the product or system that includes said element.

[0062] The foregoing description illustrates and describes several preferred embodiments of this application. However, as previously stated, it should be understood that this application is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the application concept described herein through the foregoing teachings or techniques or knowledge in related fields. Any modifications and variations made by those skilled in the art that do not depart from the spirit and scope of this application should be within the protection scope of the appended claims.

Claims

1. A high-efficiency heat dissipation structure for wind turbine generators, characterized in that, The high-efficiency heat dissipation structure for wind turbines includes: An outer casing (10) is provided with a generator (13) inside the end of the outer casing (10). Multiple evaporator tubes (14) are provided on the outside of the generator (13). An expansion valve (15) is connected to one end of each evaporator tube (14). A condenser tube (16) extending out of the outer casing (10) is connected to the end of each expansion valve (15) away from the evaporator tube (14). A high-pressure tube (18) located on the inner wall of the outer casing (10) is connected to the end of each condenser tube (16) away from the expansion valve (15). A compressor component is provided between the ends of the evaporator tube (14) and the high-pressure tube (18). The evaporator tube (14), the condenser tube (16) and the high-pressure tube (18) are filled with refrigerant. The outer casing (10) is provided with a drive shaft (27), which is connected to the power input end of the generator (13) via a coupling (38). The bottom of the outer casing (10) is provided with a base plate (11), on which a generator bracket (12) supporting the generator (13) and a compressor bracket (36) supporting the compressor components are respectively provided. The compressor components and the drive shaft (27) can be optionally connected for power connection.

2. The high-efficiency heat dissipation structure for wind turbine generators according to claim 1, characterized in that, Multiple sets of evaporator tubes (14) are spirally wound around the outside of the generator (13), with uniform pitch between each evaporator tube (14). The condenser tubes (16) corresponding to each evaporator tube (14) are also uniformly distributed on the outside of the outer casing (10). A set of tube seats (37) is provided on the inner wall of the outer casing (10) at the position corresponding to each high-pressure tube (18), and each set of tube seats (37) is fixedly connected to the corresponding high-pressure tube (18).

3. The high-efficiency heat dissipation structure for wind turbine generators according to claim 2, characterized in that, A flow guide (35) is provided on the outer side of the outer casing (10) at the corresponding position of each group of condenser tubes (16). The flow guide (35) and the outer surface of the outer casing (10) form an airflow channel. The condenser tube (16) is arranged in an S-shape and meanders within the airflow channel formed by each flow guide (35). A condenser tube rack (17) is provided inside the flow guide (35) to support and fix the condenser tube (16).

4. The high-efficiency heat dissipation structure for wind turbine generators according to claim 3, characterized in that, The compressor component includes a compressor housing (28). Multiple compression sleeves (21) are evenly distributed on the outer side of the compressor housing (28) in the circumferential direction. The compressor housing (28) and the compression sleeves (21) are coaxially arranged with the drive shaft (27). A piston (23) is slidably arranged in each compression sleeve (21) along the axial direction. An inlet check valve (19) and an outlet check valve (20) are respectively provided on the top of each compression sleeve (21). The inlet check valve (19) and the outlet check valve (20) are respectively connected to the evaporator pipe (14) and the high-pressure pipe (18).

5. The high-efficiency heat dissipation structure for wind turbine generators according to claim 4, characterized in that, The drive shaft (27) passes through the center of the compressor housing (28) and is connected to the generator (13). Each compression sleeve (21) is fixedly connected to the compressor housing (28) through a fixing sleeve (22). The compression sleeve (21) is alternatively disposed in the fixing sleeve (22). The bottom of the compressor housing (28) is fixedly connected to the compressor bracket (36).

6. The high-efficiency heat dissipation structure for wind turbine generators according to claim 5, characterized in that, An eccentric disk (26) is rotatably disposed inside the compressor housing (28). The eccentric disk (26) is eccentrically disposed relative to the transmission shaft (27) and rotatably sleeved on the outside of the transmission shaft (27). A main connecting rod (24) is rotatably disposed on the edge of the eccentric disk (26). The top end of the main connecting rod (24) is hinged to one of the pistons (23). The edge of the main connecting rod (24) is respectively hinged to the corresponding position of the other pistons (23). Each of the secondary connecting rods (25) is hinged to the corresponding piston (23).

7. The high-efficiency heat dissipation structure for wind turbine generators according to claim 6, characterized in that, The drive shaft (27) extends out of the compressor housing (28) and is rotatably connected to a flywheel sleeve (31). Multiple flywheels (32) are sleeved and fixed on the outside of the flywheel sleeve (31). The flywheel sleeve (31) is connected to the eccentric disk (26) in a transmission connection.

8. The high-efficiency heat dissipation structure for wind turbine generators according to claim 7, characterized in that, The eccentric disc (26) is fitted with a connecting flange (30) at one end outside the drive shaft (27). The connecting flange (30) is rotatably fitted outside the drive shaft (27) and fixedly connected to the end of the flywheel sleeve (31). The connecting flange (30) and the contact surface of the eccentric disc (26) are fixedly connected by a plurality of evenly arranged connecting pins (29).

9. The high-efficiency heat dissipation structure for wind turbine generators according to claim 7, characterized in that, The flywheel sleeve (31) is fixedly connected to an electromagnetic clutch (34) at the end extending from the flywheel (32), and the electromagnetic clutch (34) can optionally be powered to the drive shaft (27).

10. The high-efficiency heat dissipation structure for wind turbine generators according to claim 1, characterized in that, The flywheel (32) has a counterweight hole (33) at a specific position, and the eccentric disc (26) has a weight reduction hole (39) on its disc-shaped body.

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