Energy-saving heat dissipation equipment of wind driven generator

Abstract

The invention relates to the technical field of wind power generation, in particular to wind driven generator energy-saving heat dissipation equipment which comprises a supporting column, a protective cover, fan blades, a first rotating shaft and the like. A protective cover is fixedly connected to the supporting column; the protective cover is rotationally connected with a first rotating shaft; and the first rotating shaft is fixedly connected with a plurality of fan blades. According to the invention, the air blown by the two fans forms turbulent flow at the rotor and the stator, so that dust in the air is difficult to adhere to the rotor and the stator under the action of the turbulent flow, and the heat dissipation effect of the rotor and the stator is improved; and the baffle plate is gradually contacted with the sealing ring, so that the baffle plate seals the heat dissipation opening, and the situation that the service life of the rotor and the stator is affected due to the fact that the wind power of strong wind is larger than that of wind blown out of the heat dissipation opening and the strong wind entrains rainwater to enter the protection cover from the heat dissipation opening is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of wind power generation, and particularly relates to an energy-saving heat dissipation device for a wind turbine generator. Background Art

[0002] A wind turbine generator is a device that converts wind energy into electrical energy and is widely used in the field of renewable energy. It is divided into a horizontal-axis wind turbine generator and a vertical-axis wind turbine generator.

[0003] During the use of a wind turbine generator, heat dissipation is usually carried out by means of natural cooling, fan cooling or liquid cooling. When using fan cooling, since an air inlet needs to be reserved, dust is easily carried into the interior of the wind turbine generator along with the air flow from the air inlet. Currently, a dust cleaning structure is generally added to clean the dust, but adding an additional dust cleaning structure will increase the usage cost and maintenance cost. Summary of the Invention

[0004] In order to overcome the shortcoming that when the wind turbine generator is overloaded due to excessive wind force, causing the stator in the wind turbine generator to overheat in a short time, and the existing heat dissipation method is difficult to quickly cool it down, resulting in damage to the stator due to overheating, the present invention provides an energy-saving heat dissipation device for a wind turbine generator.

[0005] The technical implementation solution of the present invention is: an energy-saving heat dissipation device for a wind turbine generator, comprising a support column, a protective cover, fan blades, a transmission, a rotor, a stator, a first rotating shaft and a second rotating shaft; the support column is fixedly connected with the protective cover; the protective cover is rotatably connected with the first rotating shaft; the first rotating shaft is fixedly connected with a plurality of fan blades; a transmission is connected inside the protective cover, and the first rotating shaft is connected with the transmission; the transmission is connected with the second rotating shaft; a rotor is connected inside the protective cover, and the rotor is fixedly connected with the second rotating shaft; a stator is connected inside the protective cover, and the rotor is located inside the stator; further comprising a first driving member, a connecting frame, a baffle, a sealing ring, a fan, a first dust-proof filter cotton, a second dust-proof filter cotton and a third dust-proof filter cotton; the protective cover is provided with a cavity; the protective cover is provided with a plurality of heat dissipation openings; the protective cover is provided with a plurality of first air inlets; the protective cover is provided with a plurality of second air inlets; both the first air inlets and the second air inlets are communicated with the cavity; the protective cover is provided with a plurality of air inlet holes; a plurality of first driving members are connected to the protective cover; the telescopic ends of the plurality of first driving members are commonly connected with the connecting frame; a baffle for preventing rainwater from entering the protective cover is connected to the protective cover; a sealing ring for cooperating with the baffle to achieve sealing is connected to the protective cover; two fans are connected to the second rotating shaft, and a first dust-proof filter cotton is connected to each air inlet hole on the protective cover; a second dust-proof filter cotton is connected to each first air inlet on the protective cover; a third dust-proof filter cotton is connected to each heat dissipation opening on the protective cover.

[0006] Optionally, it further includes a water circulation component, which includes a water storage tank, a water inlet pipe and a water outlet pipe; the water storage tank is fixedly connected to the support column; a pump is arranged on the water storage tank; several water inlet pipes are communicated with the lower side of the water storage tank; the other end of each water inlet pipe is communicated with the cavity inside the protective cover; several water outlet pipes are communicated with the upper side of the water storage tank; the other end of each water outlet pipe is communicated with the cavity inside the protective cover; a drain port is arranged inside the water storage tank; an electric control valve is arranged on the drain port inside the water storage tank; a water level sensor is arranged inside the water storage tank.

[0007] Optionally, it further includes a reverse rotation component, which includes a planetary gear set, a third rotating shaft, a first elastic member, a first clamping block, a second elastic member, a second clamping block, a connecting rod and a connecting ring; several clamping grooves are formed on the lower fan; the lower end of the second rotating shaft is rotatably connected to the third rotating shaft; a planetary gear set is arranged between the second rotating shaft and the third rotating shaft; several first elastic members are fixedly connected to the third rotating shaft; the other end of each first elastic member is fixedly connected to a first clamping block, and the first clamping block is slidably connected to the third rotating shaft; several second elastic members are fixedly connected to the lower side of the second rotating shaft; the other end of each second elastic member is fixedly connected to a second clamping block, and the second clamping block is slidably connected to the second rotating shaft; several connecting rods are fixedly connected to the connecting frame; the other end of each connecting rod passes through the protective cover; a through groove for the connecting rod to move is arranged on the protective cover; two connecting rings are rotatably connected to the lower fan; the upper connecting ring is fixedly connected to all the connecting rods; two pressing surfaces are arranged on each connecting ring.

[0008] Optionally, it further includes a sponge cover; two sponge covers are fixedly connected to the through groove of each protective cover; the other end of each sponge cover is fixedly connected to the adjacent connecting rod.

[0009] Optionally, the inclination angles of the two fan blades are opposite.

[0010] Optionally, each second air inlet is located above the adjacent first air inlet.

[0011] Optionally, both the first dust filter cotton and the third dust filter cotton are rotatably connected to the protective cover, and torsion springs are arranged at the connection between the first dust filter cotton and the third dust filter cotton and the protective cover.

[0012] Optionally, the lower bottom surface of the protective cover is arranged in a frustum shape.

[0013] Optionally, it further includes a fixing ring and a bolt; the upper side of the baffle is movably connected to the fixing ring; a bolt is screwed on the fixing ring.

[0014] Optionally, it further includes a second driving member and a retaining ring; several second driving members are fixedly connected to the upper part of the cavity inside the protective cover; a retaining ring is fixedly connected to the telescopic ends of the several second driving members, and the retaining ring is in close contact with the inner wall of the cavity.

[0015] Compared with the prior art, the present invention has the following advantages: The present invention realizes the formation of turbulence at the rotor and stator by making the winds blown by two fans face each other, making it difficult for dust in the wind to adhere to the rotor and stator under the action of the turbulence, thereby improving the heat dissipation effect of the rotor and stator; By gradually bringing the baffle into contact with the sealing ring, the baffle closes the heat dissipation port, thereby preventing the strong wind with a greater wind force than the wind blown out from the heat dissipation port from carrying rainwater into the protective cover through the heat dissipation port and affecting the service life of the rotor and stator; By blocking the water vapor evaporated from the water circulating in the cavity with the blocking ring, the water vapor cannot enter the protective cover along the second air inlet, avoiding the corrosion of the rotor and stator by the water vapor and improving the protection effect on the rotor and stator. Description of the Drawings

[0016] Figure 1 It is a three-dimensional structural schematic diagram of the energy-saving heat dissipation device of the wind turbine of the present invention; Figure 2 It is a three-dimensional structural schematic diagram of the interior of the protective cover of the present invention; Figure 3 It is a three-dimensional structural schematic diagram of the combination of the first driving member, the connecting frame and the baffle of the present invention; Figure 4 It is a three-dimensional structural schematic diagram of the combination of the fan, the connecting rod and the connecting ring of the present invention; Figure 5 It is a three-dimensional structural schematic diagram of the combination of the connecting frame, the connecting rod and the sponge cover of the present invention; Figure 6 It is a three-dimensional structural schematic diagram of the combination of the reverse rotation assembly, the fan and the third rotating shaft of the present invention; Figure 7 It is a three-dimensional structural schematic diagram of the combination of the sealing ring, the fixing ring, the plug and the third dust-proof filter cotton of the present invention, wherein the sealing ring is in a sectional view; Figure 8 It is a three-dimensional structural schematic diagram of the combination of the second dust-proof filter cotton, the second driving member and the blocking ring of the present invention; Figure 9 It is a three-dimensional structural schematic diagram of the combination of the protective cover, the connecting frame, the baffle and the fan of the present invention, wherein the protective cover, the connecting frame and the baffle are in a sectional view.

[0017] The markings of each component in the drawings are as follows: 1 - support column, 2 - protective cover, 2001 - cavity, 2002 - heat dissipation port, 2003 - first air inlet, 2004 - second air inlet, 2005 - air inlet hole, 2006 - through groove, 3 - fan blade, 4 - transmission, 5 - rotor, 6 - stator, 7 - first driving member, 8 - connecting frame, 9 - baffle, 10 - sealing ring, 101 - first rotating shaft, 102 - second rotating shaft, 103 - fan, 10301 - card slot, 104 - fixing ring, 105 - bolt, 106 - first dust-proof filter cotton, 107 - second dust-proof filter cotton, 108 - third dust-proof filter cotton, 109 - planetary gear set, 110 - third rotating shaft, 111 - first elastic member, 112 - first clamping block, 113 - second elastic member, 114 - second clamping block, 115 - connecting rod, 116 - connecting ring, 11601 - pressing surface, 117 - sponge cover, 201 - water storage tank, 202 - water inlet pipe, 203 - water outlet pipe, 301 - second driving member, 302 - retaining ring. Detailed implementation manners

[0018] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0019] Embodiment 1

[0020] As Figures 1-9 shown, a wind turbine energy-saving heat dissipation device includes a support column 1, a protective cover 2, fan blades 3, a transmission 4, a rotor 5, a stator 6, a first rotating shaft 101 and a second rotating shaft 102; a protective cover 2 is fixedly connected to the support column 1; a first rotating shaft 101 is rotatably connected to the protective cover 2; a plurality of fan blades 3 are fixedly connected to the first rotating shaft 101; a transmission 4 is connected inside the protective cover 2, and the first rotating shaft 101 is connected to the transmission 4; the transmission 4 is connected to a second rotating shaft 102; a rotor 5 is connected inside the protective cover 2, and the rotor 5 is fixedly connected to the second rotating shaft 102; a stator 6 is connected inside the protective cover 2, and the rotor 5 is located inside the stator 6; It further includes a first driving member 7, a connecting frame 8, a baffle 9, a sealing ring 10, a fan 103, a first dust-proof filter cotton 106, a second dust-proof filter cotton 107 and a third dust-proof filter cotton 108; the protective cover 2 is provided with a cavity 2001; the protective cover 2 is provided with a plurality of heat dissipation openings 2002; the protective cover 2 is provided with a plurality of first air inlets 2003; the protective cover 2 is provided with a plurality of second air inlets 2004; both the first air inlet 2003 and the second air inlet 2004 are communicated with the cavity 2001; the protective cover 2 is provided with a plurality of air inlet holes 2005; a plurality of first driving members 7 are connected to the protective cover 2, and the first driving member 7 is an electric push rod; the telescopic ends of the plurality of first driving members 7 are commonly connected to a connecting frame 8; a baffle 9 is connected to the protective cover 2, and the baffle 9 is made of rubber material; a sealing ring 10 is connected to the protective cover 2; two fans 103 which are symmetrically arranged up and down are connected to the second rotating shaft 102, and a first dust-proof filter cotton 106 is connected to each air inlet hole 2005 in the protective cover 2; a second dust-proof filter cotton 107 is connected to each first air inlet 2003 in the protective cover 2; a third dust-proof filter cotton 108 is connected to each heat dissipation opening 2002 in the protective cover 2.

[0021] It further includes a water circulation assembly, and the water circulation assembly includes a water storage tank 201, a water inlet pipe 202 and a water outlet pipe 203; the water storage tank 201 is fixedly connected to the support column 1; a pump is arranged on the water storage tank 201; a plurality of water inlet pipes 202 are communicated with the lower side of the water storage tank 201; the other end of each water inlet pipe 202 is communicated with the cavity 2001 in the protective cover 2; a plurality of water outlet pipes 203 are communicated with the upper side of the water storage tank 201; the other end of each water outlet pipe 203 is communicated with the cavity 2001 in the protective cover 2; a drain port is arranged in the water storage tank 201; an electric control valve is arranged on the drain port in the water storage tank 201; a water level sensor is arranged in the water storage tank 201.

[0022] It further includes a reversing component, which includes a planetary gear set 109, a third rotating shaft 110, a first elastic member 111, a first clamping block 112, a second elastic member 113, a second clamping block 114, a connecting rod 115 and a connecting ring 116; a plurality of annularly distributed card slots 10301 are formed on the lower fan 103; the lower end of the second rotating shaft 102 is rotatably connected to a third rotating shaft 110; a planetary gear set 109 is arranged between the second rotating shaft 102 and the third rotating shaft 110; a plurality of annularly distributed first elastic members 111 are fixedly connected to the third rotating shaft 110, and the first elastic member 111 is a spring; the other end of each first elastic member 111 is fixedly connected to a first clamping block 112, and the first clamping block 112 is slidably connected to the third rotating shaft 110; a plurality of annularly distributed second elastic members 113 are fixedly connected to the lower side of the second rotating shaft 102, and the second elastic member 113 is a spring; the other end of each second elastic member 113 is fixedly connected to a second clamping block 114, and the second clamping block 114 is slidably connected to the second rotating shaft 102; a plurality of connecting rods 115 are fixedly connected to the connecting frame 8; the other end of each connecting rod 115 passes through the protective cover 2; a through groove 2006 for the connecting rod 115 to move is arranged on the protective cover 2; two vertically symmetric connecting rings 116 are rotatably connected to the lower fan 103; the upper connecting ring 116 is fixedly connected to all the connecting rods 115; two vertically symmetric pressing surfaces 11601 are arranged on each connecting ring 116.

[0023] It further includes a sponge cover 117; two sponge covers 117 are fixedly connected to the through groove 2006 of each protective cover 2; the other end of each sponge cover 117 is fixedly connected to the adjacent connecting rod 115.

[0024] The inclination angles of the blades of the two fans 103 are opposite.

[0025] Each second air inlet 2004 is located above the adjacent first air inlet 2003.

[0026] Both the first dust filter cotton 106 and the third dust filter cotton 108 are rotatably connected to the protective cover 2, and a torsion spring is arranged at the connection between the first dust filter cotton 106 and the third dust filter cotton 108 and the protective cover 2.

[0027] During normal use, with the view from top to bottom as the reference, the wind drives the fan blades 3 to rotate clockwise (when the wind turbine is designed and produced, it can only rotate in a single clockwise direction), thereby driving the first rotating shaft 101 to rotate clockwise, and further causing the gears inside the transmission 4 to rotate. The gears inside the transmission 4 drive the second rotating shaft 102 to rotate clockwise, and through the transmission 4, the second rotating shaft 102 is shifted to a high-speed rotation, thereby driving the rotor 5 and the two fans 103 to rotate clockwise, enabling the rotor 5 to cut the magnetic field on the stator 6, generating electricity, and realizing the power generation of the wind turbine. It should be noted that the speed-changing principle of the transmission 4 is common knowledge and will not be elaborated further. At the same time, with the view from top to bottom as the reference, during the clockwise rotation of the second rotating shaft 102, the second rotating shaft 102 will drive the planetary gear set 109 to rotate clockwise, and further drive the third rotating shaft 110 to rotate counterclockwise.

[0028] When the two fans 103 rotate, the airflow blown out by the blades of the upper fan 103 flows downward, and the airflow blown out by the blades of the lower fan 103 flows upward. Therefore, the upper fan 103 will blow downward, causing the air outside the protective cover 2 to enter the cavity 2001 from the first air inlet 2003, then enter the protective cover 2 from the second air inlet 2004, and the first dust-proof filter cotton 106 blocks the dust in the air. The lower fan 103 will blow upward, causing the air outside the protective cover 2 to enter the protective cover 2 from the air inlet hole 2005, and the second dust-proof filter cotton 107 blocks the dust in the air. Thus, the airflows blown out by the two fans 103 blow towards the rotor 5 and the stator 6, and carry the heat generated by the rotation of the rotor 5 and the stator 6, blowing towards the heat dissipation port 2002. With the view from front to back as the reference, the torsion spring on the third dust-proof filter cotton 108 is compressed, thereby causing the third dust-proof filter cotton 108 to rotate clockwise, exposing the heat dissipation port 2002, and enabling the airflow to blow out from the heat dissipation port 2002 to dissipate heat from the rotor 5 and the stator 6, preventing the mechanical properties of the rotor 5 and the stator 6 from deteriorating due to high temperature and affecting the service life of the rotor 5 and the stator 6. At the same time, since it is difficult for the first dust-proof filter cotton 106 and the second dust-proof filter cotton 107 to intercept all the dust, some dust will move to the rotor 5 and the stator 6 along with the airflow blown out by the two fans 103 and adhere to the rotor 5 and the stator 6, affecting the heat dissipation at the rotor 5 and the stator 6. Therefore, by making the two fans 103 blow against each other, a turbulent flow is formed at the rotor 5 and the stator 6. Since the turbulent flow generated by the head-on collision of the same-direction fans 103 is strong, it makes it difficult for the dust in the air to adhere to the rotor 5 and the stator 6 under the action of the turbulent flow. Different from the existing situation where there is no need to set a dust cleaning structure at the protective cover 2, it is beneficial to reduce the use and maintenance costs, and the driving of the fan 103 is driven by the second rotating shaft 102, saving electric energy. It should be noted that the first dust-proof filter cotton 106 and the second dust-proof filter cotton 107 can intercept and filter the water vapor in the air.

[0029] Since existing wind turbines are usually equipped with an overload protection system (used to prevent the current generated by overload from entering the energy storage device, and can slowly stop the fan blades 3 by mechanical braking to protect the generator), therefore, when encountering strong winds, the strong wind causes the fan blades 3 to rotate too fast, resulting in an overload of the wind turbine, the fan blades 3 are braked by the overload protection system on the wind turbine. When the overload protection system brakes the fan blades 3, the two fans 103 stop rotating, making it impossible for the fans 103 to blow air to dissipate heat to the stator 6. However, since the stator 6 is overheated due to the overload at this time, the cessation of the operation of the fans 103 will make it difficult for the stator 6 to dissipate heat quickly, resulting in overheating that affects the service life of the stator 6. Therefore, when the wind turbine is overloaded, since the wind turbine is in a strong wind environment at this time, the external airflow pressure is greater than the airflow pressure in the protective cover 2, causing the external airflow to blow to the stator 6. The third dust filter 108 can only rotate clockwise. Therefore, when the external airflow blows towards the third dust filter 108, the third dust filter 108 will not rotate, so that the dust impurities carried by the airflow are intercepted by the third dust filter 108, and the airflow will enter the protective cover 2 after passing through the third dust filter 108, and then blow out from the remaining heat dissipation ports 2002. The wind entering the protective cover 2 from the heat dissipation ports 2002 directly blows and dissipates the heat of the stator 6, so that the heat of the stator 6 that surges due to the overload of the wind turbine is taken away by the wind, thereby realizing the heat dissipation of the stator 6 when the stator 6 is overloaded and the fan 103 is not working, which is beneficial to ensure the improvement of the service life of the stator 6. It should be noted that the stator 6 and the heat dissipation port 2002 are on the same horizontal line, and the external airflow entering from the heat dissipation port 2002 can directly act on the stator 6, which is beneficial to the heat dissipation of the stator 6.

[0030] In the case of windy and rainy weather when the wind turbine does not experience overload, the first driving member 7 is controlled to drive the connecting frame 8 to move downward, so that the baffle 9 loses the block of the connecting frame 8 and gradually returns to its original state. Thus, the baffle 9 gradually contacts the sealing ring 10, completely blocking the heat dissipation port 2002, preventing air flow from being discharged or entering through the heat dissipation port 2002. This avoids the situation where the strong wind in windy and rainy weather is greater than the wind blowing out from the heat dissipation port 2002, causing the strong wind to carry rainwater into the protective cover 2 through the heat dissipation port 2002 and damaging the wind turbine. At the same time, during the process of the first driving member 7 driving the connecting frame 8 to move downward, the connecting rod 115 and the connecting ring 116 will also move downward with the connecting frame 8, further driving the lower fan 103 to move downward. As a result, the card slot 10301 on the lower fan 103 gradually disengages from the second clamping block 114. As the connecting ring 116 continues to move downward with the connecting frame 8, the pressing surface 11601 on the connecting ring 116 on the lower side of the fan 103 will press the first clamping block 112, compressing the first elastic member 111, so that the first clamping block 112 moves inward toward the inner side of the third rotating shaft 110. Subsequently, the card slot 10301 on the fan 103 will completely disengage from the second clamping block 114, causing the fan 103 to gradually stop rotating. It should be noted that the connecting ring 116 is rotatably connected to the fan 103. At this time, as the fan 103 continues to move downward, the connecting ring 116 on the lower side of the fan 103 will pass by the first clamping block 112. As the third rotating shaft 110 rotates, when the first clamping block 112 is aligned with the card slot 10301 on the fan 103, the first elastic member 111 returns to its original state, causing the first clamping block 112 to snap into the card slot 10301. Taking the top-down view as a reference, during the counterclockwise rotation of the third rotating shaft 110, the first elastic member 111, the first clamping block 112, and the lower fan 103 are driven to rotate counterclockwise, thereby changing the rotation direction of the lower fan 103 from clockwise rotation to counterclockwise rotation, making the air flow blown by the lower fan 103 change from upward blowing to downward blowing. At this time, since the upper fan 103 also blows the air flow downward, the air flow inside the protective cover 2 will all move from top to bottom. It should be noted that at this time, the baffle 9 contacts the sealing ring 10, completely closing the heat dissipation port 2002, preventing the air flow from being blown out of the protective cover 2 through the heat dissipation port 2002, while the rotor 5 is still rotating. To achieve the rain protection for the rotor 5 and the stator 6, the heat generated on the stator 6 cannot be blown out through the heat dissipation port 2002. Therefore, through the above-mentioned air flow from top to bottom carrying the heat generated on the stator 6 and flowing downward, and flowing to the outside after passing through the air inlet hole 2005 and the first dust-proof filter cotton 106, the heat dissipation under the rain protection for the rotor 5 and the stator 6 is realized, avoiding the situation where the heat generated during the rain protection for the rotor 5 and the stator 6 cannot be discharged outside the protective cover 2, resulting in damage to the rotor 5 and the stator 6 due to overheating, and improving the protection effect on the rotor 5 and the stator 6.

[0031] It should be noted that when the connecting rod 115 moves downward following the connecting frame 8, the connecting rod 115 will squeeze the sponge cover 117 below it and stretch the sponge cover 117 above it. The sponge cover 117 blocks the through groove 2006 to prevent external rainwater and dust from entering the protective cover 2 through the through groove 2006.

[0032] Meanwhile, when the airflow blown by the lower fan 103 changes to blow downward, the first dust-proof filter cotton 106 flips downward, exposing the air inlet hole 2005. Thus, under the airflow blown downward jointly by the two fans 103, the dust adhered to the rotor 5 and the stator 6 is driven to move to the outside through the air inlet hole 2005, realizing the cleaning of the dust adhered to the rotor 5 and the stator 6, ensuring the use of the rotor 5 and the stator 6, and no additional dust cleaning structure is required for cleaning the dust adhered to the rotor 5 and the stator 6. It should be noted that although during the use of the wind turbine, the dust is difficult to adhere to the rotor 5 and the stator 6 due to the airflow opposing each other by the two fans 103, after long-term use, there is still a small amount of dust on the rotor 5 and the stator 6.

[0033] After the rainy day ends, the first driving member 7 is controlled to drive the connecting frame 8 to move upward and return to the initial state, so that the baffle 9 opens the heat dissipation port 2002, and the connecting rod 115 and the connecting ring 116 drive the lower fan 103 to move upward to the initial state. The connecting ring 116 and the extrusion surface 11601 on the upper side squeeze the second fixture block 114, deforming the second elastic member 113. Thus, the clamping groove 10301 on the lower fan 103 moves back to the position of the second fixture block 114, and the second fixture block 114 is reinserted into the clamping groove 10301. Taking the top-down view as a reference, when the second rotating shaft 102 rotates clockwise, it drives the second elastic member 113, the second fixture block 114, and the lower fan 103 to rotate clockwise, so that the lower fan 103 changes from blowing downward to blowing upward again. It should be noted that a torsion spring is provided at the rotation point of the first dust-proof filter cotton 106 and the protective cover 2. When the first dust-proof filter cotton 106 flips downward, the torsion spring at the rotation point of the first dust-proof filter cotton 106 and the protective cover 2 is compressed. When the airflow blown by the lower fan 103 changes to blow upward again, the torsion spring forces the first dust-proof filter cotton 106 to flip upward and reset.

[0034] It should be noted that during normal use of the wind turbine or when the wind turbine is overloaded, the pump on the water storage tank 201 can be controlled to make the water in the water storage tank 201 enter the cavity 2001 along the water inlet pipe 202. The water flows downward under the action of gravity and returns to the water storage tank 201 along the water outlet pipe 203, realizing the water circulation in the cavity 2001. During the circulation process, the water in the cavity 2001 exchanges heat with the heat dissipated by the rotor 5 and the stator 6 during use, further improving the heat dissipation effect of the rotor 5 and the stator 6. And considering that on rainy days, strong winds will also carry rainwater into the first air inlet 2003. Due to the height difference between the first air inlet 2003 and the second air inlet 2004, the rainwater carried by the strong wind will impact on the inner wall of the cavity 2001 on the protective cover 2, then flow downward along the inner wall of the cavity 2001, and then enter the water storage tank 201 along the water outlet pipe 203, thus realizing the blocking of rainwater and the rainwater supplement of the water storage tank 201, preventing rainwater from entering the protective cover 2 and causing corrosion of the protective cover 2, the rotor 5 and the stator 6 due to moisture, thereby improving the protection effect on the rotor 5 and the stator 6. The strong wind will enter the interior of the protective cover 2 along the second air inlet 2004 and blow towards the rotor 5 and the stator 6 under the action of the fan 103 to dissipate heat for the rotor 5 and the stator 6. The rainwater that enters the water storage tank 201 will enter the cavity 2001 through the pump in the water storage tank 201 to exchange heat with the heat dissipated by the rotor 5 and the stator 6. Compared with the prior art, the present invention realizes the blocking of rainwater and the rainwater supplement of the water storage tank 201 in rainy and windy weather, prevents rainwater from affecting the heat dissipation of the wind turbine, and further dissipates heat through rainwater when the wind turbine is overloaded. It should be noted that a drain port is provided in the water storage tank 201. After the water in the water storage tank 201 is full, the water level sensor in the water storage tank 201 controls the electric control valve at the drain port to open, discharging the water in the water storage tank 201.

[0035] The lower bottom surface of the protective cover 2 is arranged in a frustum shape; the air inlet hole 2005 is higher than the bottom surface of the protective cover 2 to prevent rainwater from entering the air inlet hole 2005, improving the protection effect on the rotor 5 and the stator 6.

[0036] It also includes a fixing ring 104 and a bolt 105; the upper side of the baffle 9 is movably connected with the fixing ring 104; the bolt 105 is screwed on the fixing ring 104; the baffle 9 is fixed on the protective cover 2 through the fixing ring 104 and the bolt 105, facilitating the disassembly and replacement of the baffle 9.

[0037] Embodiment 2

[0038] On the basis of Embodiment 1, as Figure 8 and Figure 9As shown, it further includes a second driving member 301 and a retaining ring 302; several second driving members 301 are fixedly connected to the upper part inside the cavity 2001 on the protective cover 2, and the second driving member 301 is an electric push rod; a retaining ring 302 is fixedly connected to the telescopic ends of several second driving members 301, and the retaining ring 302 is in close contact with the inner wall of the cavity 2001.

[0039] When dissipating heat inside the protective cover 2 through the water circulation in the cavity 2001, control the second driving member 301 to drive the retaining ring 302 to move downward, and stop moving after the retaining ring 302 moves to the lower side of the first air inlet 2003, so that the air in the protective cover 2 can still be drawn into the protective cover 2 by the upper fan 103. After the water circulated in the cavity 2001 is evaporated, it is blocked by the retaining ring 302 and cannot enter the protective cover 2 along the second air inlet 2004, avoiding the corrosion of the rotor 5 and the stator 6 by water vapor and improving the protection effect on the rotor 5 and the stator 6.

[0040] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes may be made therein without departing from the principles and spirit of the invention, and the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. An energy-saving heat dissipation device for a wind turbine, comprising a support column (1); a protective cover (2) is fixedly connected to the support column (1); a first rotating shaft (101) is rotatably connected to the protective cover (2); a plurality of fan blades (3) are fixedly connected to the first rotating shaft (101); a transmission (4) is connected inside the protective cover (2), and the first rotating shaft (101) is connected to the transmission (4); the transmission (4) is connected to a second rotating shaft (102); a rotor (5) is connected inside the protective cover (2), and the rotor (5) is fixedly connected to the second rotating shaft (102); a stator (6) is connected inside the protective cover (2), and the rotor (5) is located inside the stator (6); characterized in that: It further includes a first driving member (7); the protective cover (2) is provided with a cavity (2001); the protective cover (2) is provided with a plurality of heat dissipation openings (2002); the protective cover (2) is provided with a plurality of first air inlets (2003); the protective cover (2) is provided with a plurality of second air inlets (2004); both the first air inlet (2003) and the second air inlet (2004) are communicated with the cavity (2001); the protective cover (2) is provided with a plurality of air inlet holes (2005); a plurality of first driving members (7) are connected to the protective cover (2); the telescopic ends of the plurality of first driving members (7) are commonly connected to a connecting frame (8); a baffle (9) for preventing rainwater from entering the protective cover (2) is connected to the protective cover (2); a sealing ring (10) for cooperating with the baffle (9) to achieve sealing is connected to the protective cover (2); two fans (103) are connected to the second rotating shaft (102), and a first dust-proof filter cotton (106) is connected to each air inlet hole (2005) on the protective cover (2); a second dust-proof filter cotton (107) is connected to each first air inlet (2003) on the protective cover (2); a third dust-proof filter cotton (108) is connected to each heat dissipation opening (2002) on the protective cover (2).

2. An energy-saving and heat-dissipating device for a wind turbine according to claim 1, characterized in that: It further includes a water circulation assembly, and the water circulation assembly includes a water storage tank (201); the water storage tank (201) is fixedly connected to the support column (1); a pump is arranged on the water storage tank (201); a plurality of water inlet pipes (202) are communicated with the lower side of the water storage tank (201); the other end of each water inlet pipe (202) is communicated with the cavity (2001) inside the protective cover (2); a plurality of water outlet pipes (203) are communicated with the upper side of the water storage tank (201); the other end of each water outlet pipe (203) is communicated with the cavity (2001) inside the protective cover (2); a drain outlet is arranged inside the water storage tank (201); an electric control valve is arranged on the drain outlet inside the water storage tank (201); a water level sensor is arranged inside the water storage tank (201).

3. An energy-saving and heat-dissipating device for a wind turbine according to claim 1, characterized in that: It further includes a reversing component, and the reversing component includes a planetary gear set (109); a plurality of card slots (10301) are formed in the fan (103) located on the lower side; the lower end of the second rotating shaft (102) is rotatably connected to a third rotating shaft (110); a planetary gear set (109) is arranged between the second rotating shaft (102) and the third rotating shaft (110); a plurality of first elastic members (111) are fixedly connected to the third rotating shaft (110); the other end of each first elastic member (111) is fixedly connected to a first clamping block (112), and the first clamping block (112) is slidably connected to the third rotating shaft (110); a plurality of second elastic members (113) are fixedly connected to the lower side of the second rotating shaft (102); the other end of each second elastic member (113) is fixedly connected to a second clamping block (114), and the second clamping block (114) is slidably connected to the second rotating shaft (102); a plurality of connecting rods (115) are fixedly connected to the connecting frame (8); the other end of each connecting rod (115) passes through the protective cover (2); a through groove (2006) for the connecting rod (115) to move is arranged on the protective cover (2); two connecting rings (116) are rotatably connected to the fan (103) located on the lower side; the connecting ring (116) located on the upper side is fixedly connected to all the connecting rods (115); two pressing surfaces (11601) are arranged on each connecting ring (116).

4. The energy-saving and heat-dissipating device for a wind turbine according to claim 3, characterized in that: It further includes a sponge cover (117); two sponge covers (117) are fixedly connected to the through groove (2006) of each protective cover (2); the other end of each sponge cover (117) is fixedly connected to the adjacent connecting rod (115).

5. The energy-saving heat dissipation device for a wind turbine according to claim 1, characterized in that: The inclination angles of the blades of the two fans (103) are opposite.

6. An energy-saving and heat-dissipating device for a wind turbine according to claim 1, characterized in that: Each second air inlet (2004) is located above the adjacent first air inlet (2003).

7. An energy-saving and heat-dissipating device for a wind turbine according to claim 1, characterized in that: Both the first dust-proof filter cotton (106) and the third dust-proof filter cotton (108) are rotatably connected to the protective cover (2), and a torsion spring is arranged at the connection between the first dust-proof filter cotton (106) and the third dust-proof filter cotton (108) and the protective cover (2).

8. An energy-saving heat dissipation device for a wind turbine according to claim 1, characterized in that: The lower bottom surface of the protective cover (2) is arranged in a frustum shape.

9. An energy-saving and heat-dissipating device for a wind turbine according to claim 1, characterized in that: It further includes a fixing ring (104); the fixing ring (104) is movably connected to the upper side of the baffle (9); a plug pin (105) is screwed on the fixing ring (104).

10. A wind turbine energy-saving and heat-dissipating device according to claim 8, characterized in that: It further includes a second driving member (301); a plurality of second driving members (301) are fixedly connected to the upper part of the cavity (2001) on the protective cover (2); a retaining ring (302) is fixedly connected to the telescopic ends of the plurality of second driving members (301), and the retaining ring (302) is in close contact with the inner wall of the cavity (2001).

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