A thermal cycle deicing system for wind turbine blades

Abstract

The present invention relates to the technical field of wind turbine deicing, and discloses a wind turbine blade thermal cycle deicing system, comprising a frame, a nacelle disposed on the top of the frame, a generator disposed inside the nacelle, a heat transfer mechanism disposed inside the frame, and a switching mechanism disposed on the side of the heat transfer mechanism away from the generator; the heat transfer mechanism comprises a heat conduction unit disposed inside the generator, a clutch unit disposed on the side of the heat conduction unit away from the generator, and a storage unit disposed on the side of the clutch unit away from the generator; the heat conduction unit comprises a heat exchange tube disposed inside the generator, a valve 1 disposed on the top of the heat exchange tube, and a rotating shaft disposed inside the generator. By providing the heat transfer mechanism, the heat generated during the power generation process of the unit can be recycled and utilized, reducing self-use electricity consumption, and different deicing media can be switched to adapt to different environments, thereby achieving the purposes of energy saving and increased adaptability.

Description

Technical Field

[0001] The present invention relates to the technical field of wind turbine deicing, and in particular to a thermal cycle deicing system for wind turbine blades. Background Art

[0002] The thermal circulation deicing system for wind turbine blades is an advanced technology used to prevent or remove ice from the blade surface. It is designed to ensure efficient and safe operation of wind turbines in cold climates. The system embeds heating elements or circulating thermal fluids inside the blades to transfer heat to the blade surface, thereby increasing the blade temperature, preventing ice from forming or melting existing ice. The thermal circulation system is usually composed of a temperature sensor, a control unit and a heating device. It can monitor the blade surface temperature and environmental conditions in real time, intelligently adjust the heating power, ensure the deicing effect while minimizing energy consumption. Compared with traditional mechanical deicing or chemical deicing methods, the thermal circulation deicing system has the advantages of high efficiency, environmental protection and no damage to the blade structure.

[0003] Traditional de-icing systems are widely used in wind turbines, but due to the limitations of their structure and operating principles, they often have some problems that cannot be ignored. For example, traditional de-icing systems usually rely on electricity or heating devices to generate heat energy, which is transferred to the blade surface through electric heating elements or thermal fluid circulation to melt the ice. However, this system has significant limitations: First, the de-icing process requires a large amount of self-consumed electricity. Especially in cold regions, icing is frequent and lasts for a long time, resulting in a significant increase in the proportion of self-consumed electricity used by the wind turbine, reducing the overall power generation efficiency and economy. Second, traditional de-icing systems have a single working fluid, usually relying only on electricity or a single thermal fluid, and are difficult to flexibly adapt to different environmental conditions and icing types. For example, in extremely low temperature or high humidity environments, the de-icing effect of a single working fluid may be greatly reduced or even unable to meet the needs. Summary of the Invention

[0004] In view of the problems of the existing technology that a large amount of self-used electricity is consumed and the poor adaptability caused by the single deicing working fluid, a wind turbine blade thermal cycle deicing system is proposed.

[0005] Its purpose is to recycle the heat generated during the power generation process of the unit and switch between different de-icing media to achieve energy saving and increase adaptability.

[0006] The technical solution of the present invention is a wind turbine blade thermal cycle deicing system, comprising a frame, a nacelle arranged on top of the frame, a generator arranged inside the nacelle, a heat transfer mechanism arranged inside the frame, and a switching mechanism arranged on a side of the heat transfer mechanism away from the generator;

[0007] The heat transfer mechanism includes a heat conduction unit disposed inside the generator, a clutch unit disposed on a side of the heat conduction unit away from the generator, and a storage unit disposed on a side of the clutch unit away from the generator;

[0008] The heat transfer unit includes a heat exchange tube arranged inside the generator, a valve 1 arranged on the top of the heat exchange tube, a rotating shaft arranged inside the generator, an end of the rotating shaft away from the generator being rotatably connected to the nacelle, fan blades arranged at the end of the rotating shaft away from the generator, a base arranged at the end of the generator close to the fan blades, an impeller arranged inside the machine, a side of the machine close to the generator is fixedly connected to the bottom of the heat exchange tube, a shaft sleeve arranged on the top of the machine, the top of the shaft sleeve is fixedly connected to the top of the heat exchange tube, an annular groove 1 is opened at the end of the rotating shaft close to the generator, three annular arrays of outlet flow channels are opened on the inner wall of the annular groove 1, an annular groove 2 is opened on the side of the rotating shaft away from the heat exchange tube, three annular arrays of inlet flow channels are opened on the inner wall of the annular groove 2, and a circulation flow channel is opened inside the fan blades.

[0009] Furthermore, the diameter of the rotating shaft matches the inner diameter of the sleeve, and the top of the heat exchange tube surrounds the outer wall of the generator.

[0010] Furthermore, the clutch unit includes a special-shaped hole opened on the side of the base away from the impeller, a spline shaft arranged inside the special-shaped hole, the spline shaft is fixedly connected to the impeller on the side close to the heat exchange tube, a baffle is arranged on the side of the spline shaft close to the impeller, a transverse gear is arranged on the side of the spline shaft away from the baffle, a return spring is arranged on the side of the transverse gear close to the baffle, both ends of the return spring are respectively fixedly connected to the transverse gear and the baffle, a driving wheel is arranged on the top of the transverse gear, the middle part of the driving wheel is fixedly connected to the rotating shaft, a cylinder is arranged on the side of the transverse gear away from the return spring, a screw is arranged on the side of the cylinder away from the transverse gear, and a multi-key shaft is arranged on the side of the screw away from the cylinder.

[0011] Furthermore, a thread is provided on one side of the special-shaped hole close to the screw rod, and the diameter of the cylinder is smaller than the diameter of the transverse gear.

[0012] Furthermore, the storage unit includes a bottom pipe arranged at the bottom of the machine, a valve 2 arranged at the top of the bottom pipe, a water tank arranged on the side of the bottom pipe away from the base, a partition arranged at the bottom of the middle of the water tank, a horizontal axis arranged in the middle of the water tank, a rotating plate arranged on the outside of the horizontal axis, and a short axis arranged on the side of the rotating axis close to the machine.

[0013] Furthermore, the outer annular array of the short shaft is provided with strip-shaped protrusions, and the bottom of the water tank is provided with an elliptical hole connected to the bottom pipe.

[0014] Furthermore, the switching mechanism includes a shell arranged on the side of the water tank close to the base, the two ends of the shell are fixedly connected to the water tank and the base respectively, two guide holes symmetrically opened on the top of the shell, a slider arranged on the inner side of the guide hole, a handwheel arranged on the top of the slider, a gear shaft arranged at the bottom of the slider, a through hole opened inside the gear shaft, a driving gear arranged at the bottom of the gear shaft, and a motor arranged on the side of the driving gear close to the base.

[0015] Furthermore, the shape of the through hole matches the outer shape of the short shaft, and the short shaft has the same cross section as the multi-key shaft.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. Through the heat transfer mechanism, the wind turbine de-icing system can utilize the heat generated during the power generation process to achieve energy-saving and environmentally friendly de-icing effects. The system uses heat recovery and transfer design to collect the waste heat generated during the operation of the wind turbine and direct it to the blade surface, thereby increasing the blade temperature, preventing the formation of ice or melting existing ice. This design not only reduces dependence on additional energy, but also reduces energy consumption during the de-icing process and improves overall energy utilization efficiency. By utilizing the heat generated during the power generation process, the wind turbine de-icing system not only ensures the stable operation of the wind turbine, but also reduces the impact on the environment, providing a sustainable solution for the reliable operation of wind farms in cold regions.

[0018] 2. Through the switching mechanism, switching between different working fluids is realized to adapt to diverse operating environments and needs. Through the switching mechanism, the wind turbine de-icing system can switch between gas and liquid working fluids to adapt to different environmental conditions and de-icing needs. When the ambient temperature is low or the risk of icing is high, the system can switch to the liquid working fluid mode, using the higher heat capacity and thermal conductivity of the liquid to quickly transfer heat to the blade surface, melt the ice layer or prevent ice formation. When the temperature is high or the de-icing demand is small, the system can switch to the gas working fluid mode, using the characteristics of strong gas fluidity and low energy consumption to achieve efficient and energy-saving operation. This flexible switching mechanism not only improves the adaptability and efficiency of the de-icing system, but also optimizes energy use according to actual working conditions and reduces operating costs.

[0019] 3. The de-icing function can be turned on and off through the set clutch unit. As a control device, the clutch unit can start the de-icing system when needed to ensure that the blades will not be affected by ice in cold climates. At the same time, when de-icing is not required, the system can be shut down to avoid unnecessary consumption. This design not only improves the operating efficiency of the wind turbine, but also ensures the stable operation of the wind turbine in extreme weather, optimizes energy utilization, and reduces operating costs. In addition, the use of the clutch unit also extends the service life of the de-icing system and reduces maintenance requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 This is a schematic diagram of the connection between the fan blade and the cabin of the present invention;

[0022] Figure 3 This is a schematic diagram of the internal structure of the cabin of the present invention;

[0023] Figure 4 This is a schematic diagram of the connection between the base and the rotating shaft of the present invention;

[0024] Figure 5 This is a schematic diagram of the connection between the impeller and the base of the present invention;

[0025] Figure 6 It is a schematic diagram of an exploded view of the clutch unit of the present invention;

[0026] Figure 7 This is a schematic diagram of the connection between the water tank and the partition of the present invention;

[0027] Figure 8 This is a schematic diagram of the connection between the rotating plate and the horizontal axis of the present invention;

[0028] Figure 9 Schematic diagram of the circulation channel structure of the present invention;

[0029] Figure 10 Schematic diagram of the special-shaped hole structure of the present invention;

[0030] Figure 11 Schematic diagram of the structure of the annular groove 1 and the annular groove 2 of the present invention;

[0031] Figure 12 This is a schematic diagram of the connection between the gear shaft and the driving gear of the present invention;

[0032] Figure 13 A cross-sectional view of a slider according to the present invention;

[0033] Figure 14 It is a schematic diagram of the shell structure of the present invention.

[0034] In the picture:

[0035] 1. Frame; 2. Nacelle; 3. Generator; 4. Heat transfer mechanism; 5. Switching mechanism; 41. Heat exchange tube; 42. Valve 1; 43. Rotating shaft; 44. Fan blade; 45. Base; 46. Impeller; 47. Bushing; 48. Ring groove 1; 49. Outlet flow channel; 410. Ring groove 2; 411. Inlet flow channel; 412. Circulating flow channel; 413. Special-shaped hole; 414. Spline shaft; 415. Baffle; 416. Horizontal Shift gear; 417, return spring; 418, driving wheel; 419, cylinder; 420, screw; 421, multi-key shaft; 422, bottom pipe; 423, valve 2; 424, water tank; 425, partition; 426, horizontal axis; 427, rotating plate; 428, short shaft; 51, housing; 52, guide hole; 53, slider; 54, handwheel; 55, gear shaft; 56, through hole; 57, driving gear; 58, motor. DETAILED DESCRIPTION

[0036] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0037] Example 1, with reference to Figures 1-14 , which is a first embodiment of the present invention, provides a wind turbine blade thermal cycle deicing system, including a frame 1, a nacelle 2 fixedly connected to the top of the frame 1, a generator 3 fixedly connected to the inside of the nacelle 2, a heat transfer mechanism 4 installed inside the frame 1, and a switching mechanism 5 installed on the side of the heat transfer mechanism 4 away from the generator 3; the heat transfer mechanism 4 includes a heat conduction unit assembled inside the generator 3, a clutch unit assembled on the side of the heat conduction unit away from the generator 3, and a storage unit assembled on the side of the clutch unit away from the generator 3; the heat conduction unit includes a heat exchange pipe 41 fixedly connected to the inside of the generator 3, a valve 42 fixedly connected to the top of the heat exchange pipe 41, a rotating shaft 43 rotatably connected to the inside of the generator 3, and a switching mechanism 5 installed on the side of the heat transfer mechanism 4 away from the generator 3. The end is rotatably connected to the nacelle 2, and is fixedly connected to the fan blade 44 at the end of the rotating shaft 43 away from the generator 3. It is fixedly connected to the base 45 at the end of the generator 3 close to the fan blade 44, and is rotatably connected to the impeller 46 inside the machine. The side of the machine close to the generator 3 is fixedly connected to the bottom of the heat exchange tube 41, and is fixedly connected to the shaft sleeve 47 at the top of the machine. The top of the shaft sleeve 47 is fixedly connected to the top of the heat exchange tube 41. An annular groove 1 48 is provided at the end of the rotating shaft 43 close to the generator 3, three annular arrays of outlet flow channels 49 are provided on the inner wall of the annular groove 1 48, an annular groove 2 410 is provided on the side of the rotating shaft 43 away from the heat exchange tube 41, three annular arrays of inlet flow channels 411 are provided on the inner wall of the annular groove 2 410, and a circulation flow channel 412 is provided inside the fan blade 44.

[0038] Specifically, when the generator 3 of the wind turbine is generating electricity, the magnetic field on the rotor moves relative to the stator coil, cutting the magnetic flux lines, thereby generating an induced current in the stator coil. The coil itself has resistance, and heat is generated when current passes through it, causing the coil to heat up. The heat is transferred to the working medium inside the heat exchange tube 41 through the heat exchange tube 41 surrounding the generator 3. When the fan blades 44 drive the rotating shaft 43 to rotate, it will drive the driving wheel 418 to rotate, and the driving wheel 418 drives the transverse gear 416 to rotate. The transverse gear 416 drives the impeller 46 to rotate through the spline shaft 414. When the impeller 46 rotates, the working medium is driven by centrifugal force to move toward the inside of the annular groove 2 410. The working medium passes through the inlet flow channel 411 and the circulation flow channel 412 in sequence through the annular groove 2 410, and then passes through the outlet flow channel 49 and enters the annular groove 2. The working fluid will eventually return to the inside of the heat exchange tube 41 through the annular groove 48, and when entering the circulation channel 412, it will transfer the heat to the fan blades 44, so that the temperature of the fan blades 44 will increase, thereby achieving the de-icing effect. The setting of the heat transfer mechanism 4 enables the wind turbine de-icing system to utilize the heat generated during the power generation process to achieve energy-saving and environmentally friendly de-icing effects. The system collects the waste heat generated during the operation of the wind turbine and guides it to the blade surface through heat recovery and transfer design, thereby increasing the blade temperature and preventing the formation of ice or melting the ice. This design not only reduces the dependence on additional energy, but also reduces the energy consumption in the de-icing process, thereby improving the overall energy utilization efficiency. By utilizing the heat generated during the power generation process, the wind turbine de-icing system can ensure the stable operation of the wind turbine while reducing the impact on the environment.

[0039] Reference Figure 4 The diameter of the rotating shaft 43 matches the inner diameter of the sleeve 47 , and the top of the heat exchange tube 41 surrounds the outer wall of the generator 3 .

[0040] Specifically, the shaft sleeve 47 cooperates with the rotating shaft 43 to isolate the annular groove 1 48 and the annular groove 2 410 . The heat exchange tube 41 is connected to the generator 3 in a surrounding manner, thereby facilitating heat exchange.

[0041] Reference Figure 5 and Figure 6The clutch unit includes a special-shaped hole 413 opened on the side of the base 45 away from the impeller 46, a spline shaft 414 rotatably connected to the inside of the special-shaped hole 413, a side of the spline shaft 414 close to the heat exchange tube 41 fixedly connected to the impeller 46, a baffle 415 fixedly connected to the side of the spline shaft 414 close to the impeller 46, a transverse gear 416 slidably connected to the side of the spline shaft 414 away from the baffle 415, and a return spring 416 fixedly connected to the side of the transverse gear 416 close to the baffle 415. 17. The two ends of the return spring 417 are fixedly connected to the transverse gear 416 and the baffle 415 respectively, and are meshed with the driving wheel 418 on the top of the transverse gear 416. The middle part of the driving wheel 418 is fixedly connected to the rotating shaft 43, abutting the cylinder 419 on the side of the transverse gear 416 away from the return spring 417, and fixedly connected to the screw 420 on the side of the cylinder 419 away from the transverse gear 416, and fixedly connected to the multi-key shaft 421 on the side of the screw 420 away from the cylinder 419.

[0042] Specifically, by rotating the screw 420, the cylinder 419 can be driven to move. When the cylinder 419 moves in the direction close to the transverse gear 416, the transverse gear 416 will be pushed to move synchronously, thereby releasing the engagement between the transverse gear 416 and the driving wheel 418. At this time, the power of the driving wheel 418 cannot be transmitted to the transverse gear 416, so that the impeller 46 stops rotating and no longer drives the medium to flow. The clutch unit can realize the opening and closing of the de-icing function. As a control device, the clutch unit can start the de-icing system when needed to ensure that the blades will not be affected by ice in cold climates. At the same time, when de-icing is not required, the system can be shut down to avoid unnecessary consumption. This design not only improves the operating efficiency of the wind turbine, but also ensures the stable operation of the wind turbine in extreme weather, optimizes energy utilization, and reduces operating costs. In addition, the use of the clutch unit also extends the service life of the de-icing system and reduces maintenance requirements.

[0043] Reference Figure 6 and Figure 10 The special-shaped hole 413 is provided with a thread on one side close to the screw rod 420 , and the diameter of the cylinder 419 is smaller than the diameter of the transverse gear 416 .

[0044] Specifically, the cylinder 419 can push the transverse gear 416 without contacting the driving wheel 418. The screw 420 is threadedly connected to the special-shaped hole 413. When the screw 420 rotates, it will move along its own axis under the action of the thread.

[0045] Reference Figure 7 and Figure 8The storage unit includes a bottom pipe 422 fixedly connected to the bottom of the machine, a valve 423 fixedly connected to the top of the bottom pipe 422, a water tank 424 fixedly connected to the side of the bottom pipe 422 away from the base 45, a partition 425 fixedly connected to the bottom of the middle part of the water tank 424, a horizontal axis 426 rotatably connected to the middle part of the water tank 424, a rotating plate 427 fixedly connected to the outside of the horizontal axis 426, and a short axis 428 fixedly connected to the side of the rotating axis 43 close to the machine.

[0046] Specifically, the short shaft 428 can be rotated to drive the horizontal shaft 426 to rotate, and the rotation of the horizontal shaft 426 will drive the rotating plate 427 to rotate together. The rotation of the rotating plate 427 will change the effective volume of the water tank 424 that can accommodate the working medium.

[0047] Reference Figure 7 and Figure 12 The outer annular array of the short axis 428 is provided with strip-shaped protrusions, and the bottom of the water tank 424 is provided with an elliptical hole connected to the bottom pipe 422.

[0048] Specifically, the short shaft 428 can cooperate with the through hole 56 of the gear shaft 55, so that the working medium in the bottom tube 422 enters the interior of the water tank 424 through the elliptical hole as the gear shaft 55 rotates.

[0049] Example 2, reference Figure 12-14 , which is the second embodiment of the present invention. This embodiment is different from the first embodiment in that: the switching mechanism 5 includes a shell 51 fixedly connected to the side of the water tank 424 close to the base 45, the two ends of the shell 51 are fixedly connected to the water tank 424 and the base 45 respectively, two guide holes 52 symmetrically opened at the top of the shell 51, a slider 53 slidably connected to the inner side of the guide hole 52, a handwheel 54 meshingly connected to the top of the slider 53, a gear shaft 55 rotatably connected to the bottom of the slider 53, a through hole 56 opened in the gear shaft 55, a driving gear 57 meshingly connected to the bottom of the gear shaft 55, and a motor 58 fixedly connected to the driving gear 57 close to the side of the base 45.

[0050] Specifically, by rotating the hand wheel 54 to move it upward, the fixation of the slider 53 can be released, so that the slider 53 can move along the guide hole 52. When the slider 53 moves, the gear shaft 55 will be driven to move together. When the gear shaft 55 moves toward the base 45 to the maximum stroke, the through hole 56 can be matched with the multi-key shaft 421. When the gear shaft 55 moves to the maximum stroke in the direction away from the multi-key shaft 421, it can be matched with the short shaft 428 and released from the multi-key shaft 421. The motor 58 can drive the gear shaft 55 to rotate through the driving gear 57. After the gear shaft 55 rotates, it can drive the short shaft 428 or the multi-key shaft 421 in the matched state to rotate, and the switching between different working media is realized by the switching mechanism 5. In order to adapt to diverse operating environments and needs, the wind turbine de-icing system can switch between gas and liquid working fluids through the provided switching mechanism 5 to adapt to different environmental conditions and de-icing needs. When the ambient temperature is low or the risk of icing is high, the system can switch to the liquid working fluid mode, and use the higher heat capacity and thermal conductivity of the liquid to quickly transfer heat to the blade surface to melt the ice layer or prevent ice formation. When the temperature is high or the de-icing demand is low, the system can switch to the gas working fluid mode, and use the characteristics of strong gas fluidity and low energy consumption to achieve efficient and energy-saving operation. This flexible switching mechanism not only improves the adaptability and efficiency of the de-icing system, but also optimizes energy use according to actual working conditions and reduces operating costs.

[0051] Reference Figure 6-Figure 12 The shape of the through hole 56 matches the outer shape of the short shaft 428, and the short shaft 428 has the same cross-section as the multi-key shaft 421.

[0052] Specifically, the short shaft 428 and the multi-key shaft 421 can be inserted into the inside of the through hole 56. When the gear shaft 55 rotates, it can drive the short shaft 428 and the spline in the matching state to rotate. The rest of the structure is the same as that of Example 1.

[0053] In summary, the working principle of the present invention is as follows: the fan blades 44 drive the rotating shaft 43 to rotate while rotating, and the rotating shaft 43 drives the transverse gear 416 to rotate through the driving wheel 418. The transverse gear 416 drives the impeller 46 to rotate through the spline shaft 414 while rotating. After the impeller 46 rotates, the working medium filled in the heat exchange tube 41 is thrown to the outside of itself by centrifugal force. After being driven by the impeller 46, the working medium enters the annular groove 48, and then enters the inlet flow channel 411, and passes through the circulation flow channel 412 and the outlet flow channel 49 in turn, and then enters the annular groove 48, and then re-enters the interior of the heat exchange tube 41, thereby entering the next cycle. During the process, the valve 1 42 and the valve 2 423 are kept closed to prevent the working medium from entering the water tank 424 or from the heat exchanger. The top of the tube 41 overflows, and the working medium exchanges heat with the fan blades 44 during the process of passing through the circulation channel 412, thereby de-icing the fan blades 44. When the working medium needs to be switched to air, the constraint on the slider 53 is released by turning the hand wheel 54, and the slider 53 is moved toward the direction close to the water tank 424 to the maximum stroke. The slider 53 is constrained again by turning the hand wheel 54. The slider 53 drives the gear shaft 55 to move together with it while moving, so that the through hole 56 is sleeved on the outside of the short shaft 428. At this time, the valve 1 42 and the valve 2 423 are opened, and then the motor 58 is started. The motor 58 drives the gear shaft 55 to rotate through the driving gear 57. The gear shaft 55 rotates, and the gear shaft 55 drives the horizontal shaft 426 to rotate through the short shaft 428. The horizontal shaft 426 rotates and drives the rotating plate at the same time. 427 rotates together. By controlling the moving direction of the rotating plate 427, the size of the cavity connecting the bottom pipe 422 between the rotating plate 427 and the partition 425 can be controlled. After the rotation and movement, the effective volume formed by the cavity increases, and the liquid working medium in the bottom pipe 422 will enter the water tank 424 under the action of the pressure difference. The liquid working medium passing through the rotor position will enter the bottom pipe 422 under the action of gravity and pressure difference. The outside air will enter the heat exchange tube 41 through valve 1 42. As the two working media continue to circulate, the liquid working medium will gradually enter the water tank 424, and the air will gradually fill the entire circulation channel. After the switching is completed, close valve 1 42 and valve 2 423 to realize the conversion of liquid working medium into gaseous working medium. When the working medium needs to be switched again, open valve 1 42 and valve 2 423. Second 423, control the rotary plate 427 to discharge the liquid working medium from the water tank 424, the liquid working medium will gradually fill the circulation channel, and discharge the lighter gas through the valve 1 42. After the gas is discharged, close the valve 1 42 and the valve 2 423. When it is necessary to turn off the de-icing function, move the slider 53 toward the direction close to the base 45 to the maximum stroke, so that the gear shaft 55 is matched with the multi-key shaft 421, and then start the motor 58. The motor 58 drives the gear shaft 55 to rotate through the driving gear 57, and the gear shaft 55 drives the screw 420 to rotate. While the screw 420 rotates, it pushes the cylinder 419 under the action of the thread. The cylinder 419 pushes the transverse gear 416 to release it from the meshing with the driving wheel 418, so that the impeller 46 loses power and no longer drives the working medium circulation.By rotating the screw rod 420 in the opposite direction, the cylinder 419 can be reset. After the transverse gear 416 loses the push of the cylinder 419, it will resume the meshing with the driving wheel 418 under the action of the reset spring 417, so that the impeller 46 drives the working medium to circulate.

[0054] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A wind turbine blade thermal cycle deicing system, comprising a frame (1), a nacelle (2) disposed on top of the frame (1), and a generator (3) disposed inside the nacelle (2), characterized in that: It also includes a heat transfer mechanism (4) disposed inside the frame (1), and a switching mechanism (5) disposed on a side of the heat transfer mechanism (4) away from the generator (3); The heat transfer mechanism (4) comprises a heat conduction unit arranged inside the generator (3), a clutch unit arranged on a side of the heat conduction unit away from the generator (3), and a storage unit arranged on a side of the clutch unit away from the generator (3); The heat transfer unit comprises a heat exchange tube (41) arranged inside the generator (3), a valve (42) arranged on the top of the heat exchange tube (41), a rotating shaft (43) arranged inside the generator (3), an end of the rotating shaft (43) away from the generator (3) being rotatably connected to the cabin (2), a fan blade (44) arranged at the end of the rotating shaft (43) away from the generator (3), a base (45) arranged at the end of the generator (3) close to the fan blade (44), an impeller (46) arranged inside the base (45), and a side of the base close to the generator (3) being connected to the heat exchange tube (41). ) is fixedly connected to the bottom of the rotating shaft (43), a shaft sleeve (47) is arranged on the top of the machine, the top of the shaft sleeve (47) is fixedly connected to the top of the heat exchange tube (41), a ring groove (48) is provided on the end of the rotating shaft (43) close to the generator (3), three ring arrays of outlet flow channels (49) are provided on the inner wall of the ring groove (48), a ring groove (410) is provided on the side of the rotating shaft (43) away from the heat exchange tube (41), three ring arrays of inlet flow channels (411) are provided on the inner wall of the ring groove (410), and a circulation flow channel (412) is provided inside the fan blade (44); The clutch unit comprises a special-shaped hole (413) provided on a side of the base (45) away from the impeller (46), a spline shaft (414) provided inside the special-shaped hole (413), a side of the spline shaft (414) close to the heat exchange tube (41) fixedly connected to the impeller (46), a baffle (415) provided on a side of the spline shaft (414) close to the impeller (46), a transverse gear (416) provided on a side of the spline shaft (414) away from the baffle (415), and a return spring (416) provided on a side of the transverse gear (416) close to the baffle (415). 7), the two ends of the return spring (417) are fixedly connected to the transverse gear (416) and the baffle (415), respectively, a driving wheel (418) is arranged on the top of the transverse gear (416), the middle part of the driving wheel (418) is fixedly connected to the rotating shaft (43), a cylinder (419) is arranged on the side of the transverse gear (416) away from the return spring (417), a screw (420) is arranged on the side of the cylinder (419) away from the transverse gear (416), and a multi-key shaft (421) is arranged on the side of the screw (420) away from the cylinder (419).

2. The wind turbine blade thermal cycle deicing system according to claim 1, characterized in that: The diameter of the rotating shaft (43) matches the inner diameter of the shaft sleeve (47), and the top of the heat exchange tube (41) surrounds the outer wall of the generator (3).

3. The wind turbine blade thermal cycle deicing system according to claim 1, characterized in that: The special-shaped hole (413) is provided with a thread on one side close to the screw rod (420), and the diameter of the cylinder (419) is smaller than the diameter of the transverse gear (416).

4. The wind turbine blade thermal cycle deicing system according to claim 1, characterized in that: The storage unit includes a bottom pipe (422) arranged at the bottom of the machine, a second valve (423) arranged at the top of the bottom pipe (422), a water tank (424) arranged at the side of the bottom pipe (422) away from the base (45), a partition (425) arranged at the bottom of the middle of the water tank (424), a horizontal axis (426) arranged at the middle of the water tank (424), a rotating plate (427) arranged outside the horizontal axis (426), and a short axis (428) arranged at the side of the rotating axis (43) close to the machine.

5. The wind turbine blade thermal cycle deicing system according to claim 4, characterized in that: The outer annular array of the short shaft (428) is provided with strip-shaped protrusions, and the bottom of the water tank (424) is provided with an elliptical hole connected to the bottom pipe (422).

6. The wind turbine blade thermal cycle deicing system according to claim 1, characterized in that: The switching mechanism (5) comprises a housing (51) arranged on a side of the water tank (424) close to the base (45), two ends of the housing (51) being fixedly connected to the water tank (424) and the base (45), two guide holes (52) symmetrically opened at the top of the housing (51), a slider (53) arranged inside the guide holes (52), a handwheel (54) arranged at the top of the slider (53), a gear shaft (55) arranged at the bottom of the slider (53), a through hole (56) opened inside the gear shaft (55), a driving gear (57) arranged at the bottom of the gear shaft (55), and a motor (58) arranged on the side of the driving gear (57) close to the base (45).

7. The wind turbine blade thermal cycle deicing system according to claim 6, characterized in that: The shape of the through hole (56) matches the outer shape of the short shaft (428), and the short shaft (428) has the same cross section as the multi-key shaft (421).

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