A water cooling system for a wind turbine

Abstract

This invention discloses a water-cooling system for a wind turbine, belonging to the field of wind power generation technology. It includes a nacelle, with a gearbox installed inside. A drive shaft is connected to the other end of the gearbox. A generator is installed inside the nacelle, and the drive shaft is connected to the generator's output shaft via a coupling. A water tank is installed inside the nacelle via a support structure. Water in the water tank is directed by the drive shaft to a water-cooling radiator, which then allows the water to flow back into the water tank naturally by gravity. At higher wind speeds, the drive shaft rotates rapidly, driving a bidirectional lead screw to rotate quickly, which in turn pushes a baffle plate to rapidly circulate the water for cooling. This system can adapt to the generator's power requirements for rapid cooling circulation without the need for an additional power source, thus reducing energy consumption.

Description

Technical Field

[0001] This invention relates to the field of wind power generation technology, and more specifically, to a water cooling system for a wind turbine generator. Background Technology

[0002] Wind power generation, as a core form of clean and renewable energy utilization, involves wind turbine blades capturing wind energy and transferring it to the generator through a transmission system, converting mechanical energy into electrical energy. During this process, electromagnetic induction in the stator and rotor of the generator generates copper and iron losses, while friction in the transmission components and the continuous operation of auxiliary electronic equipment also release a significant amount of heat. If this heat cannot be dissipated promptly and efficiently, the internal temperature of the nacelle will continuously rise, accelerating the aging of insulation materials, shortening the lifespan of core components, and potentially triggering equipment overload protection, short circuits, and other malfunctions, severely impacting power generation efficiency and operational stability.

[0003] In existing wind turbines, some systems rely on additional motors, water pumps, and other electronic devices to drive heat dissipation components, resulting in high energy consumption, numerous failure points, and high maintenance costs. In some systems, the water pressure and flow rate are entirely determined by the main shaft speed, leading to insufficient heat dissipation efficiency at low wind speeds and overcooling at high wind speeds or low generator loads, resulting in poor adaptability and control flexibility. At the same time, traditional heat dissipation structures have stringent sealing requirements, are susceptible to environmental factors, and lack redundant protection mechanisms, making them prone to heat dissipation failure when critical components malfunction. Therefore, a water-cooling system for wind turbines is proposed. Summary of the Invention

[0004] The purpose of this invention is to provide a water-cooling system for wind turbine generators to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a wind turbine water-cooling system, comprising a nacelle, a gearbox installed inside the nacelle, a drive shaft connected to the other end of the gearbox, a generator installed inside the nacelle, the drive shaft connected to the output shaft of the generator via a coupling, a water tank installed inside the nacelle via a support structure, a double-acting lead screw rotatably connected to the center of the water tank, a baffle plate threaded onto the outside of the double-acting lead screw, one end of the double-acting lead screw penetrating the outer wall of the water tank and fixedly connected to a driven gear, a driving gear fixedly connected to the outside of the drive shaft, the driving gear meshing with the driven gear, a water-guiding and heat-dissipating shell sleeved on the outside of the generator, a water supply pipe connected to the outside of the water tank, one end of the water supply pipe connected to the water inlet of the generator, and the outlet of the water-guiding and heat-dissipating shell connected to the water inlet of the water tank via a return water pipe.

[0006] Preferably, the baffle plate has multiple movable slots on its exterior, a movable plate is slidably connected inside the movable slots, a pushing airbag is fixedly connected to the bottom of the movable plate, an air pump is fixedly connected to the top of the water tank, an air supply pipe is connected to the air outlet of the air pump, the end of the air supply pipe away from the air pump passes through the outer wall of the water tank and is connected to an electrically controlled diversion valve pipe, the electrically controlled diversion valve pipe is installed inside the baffle plate, and multiple air outlets of the electrically controlled diversion valve pipe are respectively connected to the air inlets of multiple pushing airbags.

[0007] Preferably, a plurality of piston telescopic bladders are installed on the outside of the baffle plate. The air outlets of the plurality of piston telescopic bladders penetrate the outer wall of the baffle plate and are connected to the pushing air bladder. The other end of the piston telescopic bladder is fixedly connected to the inner wall of the water tank. An air inlet and outlet pipe is connected to the outside of the piston telescopic bladder. The air inlet and outlet of the air inlet and outlet pipe penetrate the outer wall of the water tank and are connected to a regulating valve.

[0008] Preferably, a shape memory alloy is fixedly connected inside the pushing airbag, one end of the shape memory alloy is fixedly connected to the outside of the moving plate, and the other end of the shape memory alloy passes through the outer wall of the pushing airbag and is fixedly connected to the inner bottom wall of the moving groove.

[0009] Preferably, the water baffle has multiple water passage holes on its exterior, and a one-way valve plate is hinged to the exterior of each water passage hole.

[0010] Preferably, a guide rod is fixedly connected inside the water tank, and the guide rod passes through the outer wall of the baffle plate.

[0011] Preferably, the support structure includes a bottom fixing seat, which is fixedly connected to the inner bottom wall of the cabin. At least four adjusting cylinders are installed on the bottom fixing seat, and the output shaft of the adjusting cylinder is connected to a bearing seat through a ball joint. The bidirectional lead screw is placed on the bearing seat.

[0012] Preferably, the outlet of the return water pipe is hinged with a water-blocking one-way valve plate.

[0013] Preferably, a first temperature sensor is fixedly connected inside the water tank, and a second temperature sensor is installed outside the generator.

[0014] Preferably, a plurality of water-conducting and heat-dissipating fins are fixedly connected inside the water-conducting heat dissipation shell.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] In this invention, the water inside the water tank is concentrated and transported to the interior of the water-conducting heat dissipation shell by the power of the drive shaft. The water-conducting heat dissipation shell then naturally returns the water to the interior of the water tank by gravity. Furthermore, when the wind speed is high, the drive shaft rotates at a faster speed, which in turn drives the bidirectional lead screw to rotate rapidly, thereby pushing the baffle plate to quickly promote the water flow for cooling circulation. This allows for rapid cooling circulation that can adapt to the power of the generator, and it eliminates the need for an additional power source, thus reducing power consumption. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of an embodiment of the present invention;

[0018] Figure 2 This is a schematic diagram of the internal structure of the cabin in an embodiment of the present invention;

[0019] Figure 3 This is a schematic diagram of the internal structure of the water tank in an embodiment of the present invention;

[0020] Figure 4 This is a schematic diagram of the structure of the baffle plate in an embodiment of the present invention;

[0021] Figure 5 This is a schematic diagram of the moving trough and the baffle plate in an embodiment of the present invention;

[0022] Figure 6 This is a cross-sectional view of the baffle plate in an embodiment of the present invention;

[0023] Figure 7 This is a partial cross-sectional view of the water tank in an embodiment of the present invention;

[0024] Figure 8 This is an embodiment of the present invention. Figure 2 A magnified structural diagram of area A in the diagram;

[0025] Figure 9 This is a cross-sectional view of the water-conducting heat dissipation shell in an embodiment of the present invention.

[0026] In the diagram: 100, Engine compartment; 101, Gearbox; 102, Transmission spindle; 103, Generator; 104, Drive gear; 105, Water tank; 106, Double-acting lead screw; 107, Driven gear; 108, Water baffle; 109, Guide rod; 110, Water supply pipe; 111, Water return pipe; 112, Water-guiding and radiating shell; 200, Moving slot; 201, Moving plate; 202, Pushing airbag; 203, Air pump; 204 1. Air supply pipe; 205. Electrically controlled diverter valve pipe; 300. Piston telescopic bladder body; 301. Inlet and outlet air pipes; 302. Regulating valve; 400. Shape memory alloy; 500. Water passage hole; 501. Water one-way valve plate; 600. Support seat; 601. Bottom fixing seat; 602. Regulating cylinder; 700. First temperature sensor; 701. Second temperature sensor; 800. Water blocking one-way valve plate; 900. Water guiding heat dissipation fins. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] Example 1, such as Figures 1-9 As shown, this application discloses a water-cooled system for a wind turbine generator, including a nacelle 100. A gearbox 101 is installed inside the nacelle 100, and a drive shaft 102 is connected to the other end of the gearbox 101. A generator 103 is installed inside the nacelle 100, and the drive shaft 102 is connected to the output shaft of the generator 103 via a coupling. A water tank 105 is installed inside the nacelle 100 via a support structure. A double-acting lead screw 106 is rotatably connected to the center of the water tank 105, and a baffle plate 1 is threaded onto the outside of the double-acting lead screw 106. 08. One end of the double-acting lead screw 106 passes through the outer wall of the water tank 105 and is fixedly connected to the driven gear 107. The external drive shaft 102 is fixedly connected to the driving gear 104, which meshes with the driven gear 107. The generator 103 is fitted with a water-conducting heat dissipation shell 112. The water tank 105 is connected to the outside of a water supply pipe 110. One end of the water supply pipe 110 is connected to the water inlet of the generator 103. The outlet of the water-conducting heat dissipation shell 112 is connected to the water inlet of the water tank 105 through a return water pipe 111.

[0029] Specifically, during use, the gearbox 101 is used to connect the fan blade shaft of the wind turbine, transmit the power of the wind turbine, and optimize the power transmission through speed regulation; the transmission main shaft 102 is used to stably transmit the power of the wind turbine fan blade to the generator 103 after the gearbox 101 adjusts the power of the wind turbine fan blade, thus providing the power basis for power generation.

[0030] Furthermore, the generator 103 serves as the energy conversion core, converting the mechanical energy transmitted by the drive shaft 102 into electrical energy. The water tank 105 stores coolant or cooling water for cooling the generator 103, providing a medium reserve for water-cooling circulation. The driving gear 104 and driven gear 107 on the drive shaft 102 cooperate to form a power transmission unit, transmitting the rotational power of the drive shaft 102 to the double-acting lead screw 106, causing it to rotate. The rotating lead screw 106 drives the baffle plate 108 to move back and forth inside the water tank 105, forcing water into the water supply pipe 11 through mechanical thrust. In the 0, the water flowing continuously into the water supply pipe 110 will enter the water-conducting heat dissipation shell 112, forming the water outlet channel for water circulation. The water flowing into the water-conducting heat dissipation shell 112 will flow from top to bottom due to gravity. When the water flows from top to bottom, it can carry away the heat dissipated by the generator 103 into the water-conducting heat dissipation shell 112. As gravity gradually enters the inlet of the return water pipe 111, the return water pipe 111 is used to collect the water that has completed the heat dissipation in the water-conducting heat dissipation shell 112 and repeatedly transport it into the water tank 105 to form a closed loop circulation, thus realizing the water-cooled circulation heat dissipation of the generator 103.

[0031] Furthermore, the water-conducting heat dissipation shell 112 is used to tightly cover the outside of the generator 103. When water continuously enters its interior, the water carries away the heat dissipated by the generator 103 through heat exchange with the shell. Moreover, the bottom wall of the water-conducting heat dissipation shell 112 is inclined, which can concentrate the dissipated water flow to the return water pipe 111 by gravity, ensuring the smooth return of water circulation.

[0032] like Figure 9 As shown, multiple water-conducting heat dissipation fins 900 are fixedly connected inside the water-conducting heat dissipation shell 112.

[0033] Specifically, the water-conducting heat dissipation fins 900 are made of metal material with high thermal conductivity, and have a sheet-like structure. They are evenly distributed on the inner wall of the water-conducting heat dissipation shell 112 and are tightly fitted to the outer shell of the generator 103. On the one hand, they can increase the heat exchange area between the generator 103 and the coolant, accelerate heat transfer, and assist the generator 103 in heat dissipation. On the other hand, they can evenly distribute and guide the water flow into the water-conducting heat dissipation shell 112, so that the water flow can evenly cover all positions inside the water-conducting heat dissipation shell 112, making the overall heat dissipation of the generator 103 uniform.

[0034] like Figures 4-6 As shown, the water baffle 108 has multiple water passage holes 500 on its exterior, and a water passage one-way valve plate 501 is hinged to the exterior of the water passage holes 500.

[0035] Specifically, water passage holes 500 are evenly distributed on the body of the baffle plate 108, penetrating both sides of the baffle plate 108. When the baffle plate 108 moves back and forth, the water flow on the other side of the baffle plate 108 can pass through the water passage holes 500 and enter the space on the squeezing side, ensuring that the water flow on the squeezing side can be replenished in time, and ensuring the continuity and stability of water flow. The water passage one-way valve plate 501 is hinged to the squeezing side port of the water passage hole 500. When the water flow flows from the non-squeezing side to the squeezing side, it can automatically open by the thrust of the water flow, and automatically close under the pressure of the water flow on the squeezing side. It can be used to prevent the water flow on the squeezing side from flowing back into the water passage hole 500, and avoid water backflow affecting the squeezing efficiency.

[0036] like Figures 2-8 As shown, the support structure includes a bottom fixing seat 601, which is fixedly connected to the inner bottom wall of the cabin 100. At least four adjusting cylinders 602 are installed on the bottom fixing seat 601. The output shaft of the adjusting cylinder 602 is connected to the bearing seat 600 through a ball joint. A two-way lead screw 106 is placed on the bearing seat 600.

[0037] Specifically, the bottom mounting base 601 is bolted to the inner bottom wall of the engine compartment 100 to provide stable support and positioning for the support base 600 and the adjusting cylinder 602. The adjusting cylinder 602 can be pneumatically or hydraulically driven and is evenly distributed on the top of the bottom mounting base 601. Its output shaft is connected to the support base 600 through a ball joint and is used to adjust the height of the water tank 105 and the driven gear 107. When the generator 103 needs cooling, the adjusting cylinder 602 extends to raise the position of the water tank 105 and the driven gear 107, so that the driven gear 107 and the driving gear 104 mesh precisely. When cooling is not required, the adjusting cylinder 602 retracts to lower the position, so that the gears disengage and reduce mechanical wear.

[0038] like Figure 3 As shown, a guide rod 109 is fixedly connected inside the water tank 105, and the guide rod 109 passes through the outer wall of the baffle plate 108.

[0039] Specifically, the guide rod 109 is distributed parallel to both sides of the double-acting screw 106, and its two ends are fixedly connected to the front and rear inner walls of the water tank 105. It is also in clearance fit with the through hole of the baffle plate 108. The guide rod 109 is used to guide the reciprocating movement of the baffle plate 108, restrict the circumferential rotation of the baffle plate 108, and prevent it from rotating or deviating under the drive of the double-acting screw 106. This ensures that the baffle plate 108 always moves smoothly along a straight line and guarantees the stability of the water flow compression.

[0040] like Figure 7 As shown, the outlet of the return water pipe 111 is hinged with a water-blocking one-way valve plate 800.

[0041] Specifically, the water-blocking one-way valve plate 800 is installed at the connection between the return water pipe 111 and the water tank 105, located inside the water tank 105. It automatically opens under the water flow pressure of the return water pipe 111, allowing the cooled water to flow into the water tank 105. It automatically closes under the water flow pressure inside the water tank 105 to prevent the high-pressure water flow generated by the baffle plate 108 from entering the return water pipe 111 in the opposite direction, ensuring smooth one-way flow of water circulation.

[0042] The technical solutions in the above-described embodiments of this application have at least the following technical effects or advantages: Compared with the prior art, in this embodiment, the water flow inside the water tank 105 is concentrated and transported to the interior of the water-conducting heat dissipation shell 112 by the power of the transmission main shaft 102. The water-conducting heat dissipation shell 112 will then naturally return the water flow to the interior of the water tank 105 by gravity. Furthermore, when the wind speed is high, the transmission main shaft 102 rotates faster, and the faster rotation speed will drive the bidirectional lead screw 106 to rotate rapidly, thereby pushing the baffle plate 108 to quickly push the water flow for cooling circulation. This can adapt to the power of the generator 103 for rapid cooling circulation, and there is no need to set up an additional power source, thus reducing power consumption.

[0043] Example 2: Considering that during use, the driven gear 107 constantly drives the double-acting lead screw 106 to rotate, and the baffle plate 108, driven by the double-acting lead screw 106, constantly pushes back and forth a specified amount of water flow, this may cause over-cooling when the generator 103 is under a small load, making adaptive adjustment impossible. To address the above technical problems, this application proposes the following technical solution:

[0044] like Figures 4-6As shown, the water baffle 108 has multiple movable slots 200 on its exterior. A movable plate 201 is slidably connected inside the movable slots 200. A push airbag 202 is fixedly connected to the bottom of the movable plate 201. An air pump 203 is fixedly connected to the top of the water tank 105. An air outlet of the air pump 203 is connected to an air supply pipe 204. The end of the air supply pipe 204 away from the air pump 203 passes through the outer wall of the water tank 105 and is connected to an electrically controlled diversion valve pipe 205. The electrically controlled diversion valve pipe 205 is installed inside the water baffle 108. Multiple air outlets of the electrically controlled diversion valve pipe 205 are respectively connected to the air inlets of multiple push airbags 202.

[0045] Specifically, the movable troughs 200 are evenly distributed on the baffle plate 108 and are used to store and guide the movable plates 201, allowing the movable plates 201 to slide vertically along the trough. In the open state, water flow is allowed to pass freely, thereby reducing the effective water flow squeezed by the baffle plate 108. The movable plates 201 are tightly attached to the wall of the movable trough 200. By moving up and down inside the movable trough 200, the amount of water flowing through the movable trough 200 is changed, thereby realizing the dynamic adjustment of the amount of water pushed into the water pipe 110 by the baffle plate 108.

[0046] Furthermore, during the adjustment of the moving plate 201, the operator can activate the air pump 203. When activated, the air pump 203 continuously supplies gas to the air delivery pipe 204, which in turn continuously supplies gas to the electrically controlled diversion valve pipe 205. The electrically controlled diversion valve pipe 205 is a branch pipe with an electrically controlled valve, integrated into a reserved channel inside the baffle plate 108. It is used to distribute the concentrated gas supplied by the air delivery pipe 204 to multiple pushing airbags 202. After entering the push airbag 202, the push airbag 202 will expand. When the push airbag 202 is inflated, it can generate an upward thrust, which pushes the moving plate 201 to rise along the moving groove 200, thereby achieving different degrees of sealing of the moving groove 200. When the moving plate 201 moves to different positions inside the moving groove 200, it can adjust the water flow rate inside the moving groove 200, thereby dynamically adjusting the water cooling effect on the generator 103 when facing different temperatures.

[0047] like Figures 2-7 As shown, a first temperature sensor 700 is fixedly connected inside the water tank 105, and a second temperature sensor 701 is installed outside the generator 103.

[0048] Specifically, the first temperature sensor 700 is installed in the middle of the water tank 105 to detect the temperature of the coolant inside the water tank 105 in real time, providing data support for judging the cooling effect of the coolant; the second temperature sensor 701 is evenly distributed on the outside of the water-conducting heat sink 112 to monitor the surface temperature of the water-conducting heat sink 112 in real time, indirectly reflecting the heating status of the generator 103. Both temperature sensors are electrically connected to the system controller, which intelligently controls the valve opening of the electronically controlled diversion valve 205 and the working status of the air pump 203 based on the detected temperature data, thereby adjusting the position of the moving plate 201 to achieve precise adjustment of the heat dissipation flow.

[0049] The technical solutions in the above embodiments of this application have at least the following technical effects or advantages: Compared with Embodiment 1, in this embodiment, by using the moving slot 200 and the moving plate 201 together, the moving slot 200 remains open when the generator 103 is under low load, and the water flow can pass freely, which greatly reduces the effective water flow squeezed by the baffle plate 108, avoids excessive cooling caused by the fixed water flow push amount, ensures the stable working temperature of the generator 103 under low load, prevents the components from being affected by low temperature, and under low load operation, reducing the squeezed water flow can effectively reduce the transmission force required by the baffle plate 108.

[0050] Example 3: Considering that an additional power source is needed to power the air pump 203 during continuous use, and that the water pressure and flow rate are entirely dependent on the spindle speed, the drive spindle 102 rotates slowly when the wind speed is too low, the water-pushing force of the baffle 108 is insufficient, the water circulation speed decreases, and the heat dissipation efficiency cannot match the heat demand of the generator 103, this application proposes the following technical solution to address the above technical problems:

[0051] like Figure 3 As shown, multiple piston telescopic bladders 300 are installed on the outside of the baffle plate 108. The air outlets of the multiple piston telescopic bladders 300 penetrate the outer wall of the baffle plate 108 and are connected to the push air bladder 202. The other end of the piston telescopic bladder 300 is fixedly connected to the inner wall of the water tank 105. The outside of the piston telescopic bladder 300 is connected to an air inlet / outlet pipe 301. The air inlet / outlet of the air inlet / outlet pipe 301 penetrates the outer wall of the water tank 105 and is connected to a regulating valve 302.

[0052] Specifically, the piston telescopic bladder 300 is symmetrically distributed on both sides of the baffle plate 108. One end is fixedly connected to the side wall of the baffle plate 108, and the other end is fixed to the inner wall of the water tank 105. It is used to connect the baffle plate 108 and the side wall of the water tank 105. When the baffle plate 108 moves back and forth driven by the bidirectional screw 106, it will pull the piston telescopic bladder 300 to perform a piston movement of extension and retraction. With the help of the air inlet and outlet pipes 301 and the regulating valve 302, external gas can be drawn into the piston telescopic bladder 300. The gas that enters the piston telescopic bladder 300 can be concentrated and transported to the push airbag 202 for replenishment through the delivery pipe. The air pressure of the push airbag 202 can be maintained stably without additional power, and the air pump 203 does not need to be used frequently for replenishment, saving resources.

[0053] Furthermore, when the piston telescopic bladder 300 draws in external air, a certain amount of gas will remain inside it. With a certain amount of gas remaining inside, it can provide elastic support to the rear of the baffle plate 108. When the baffle plate 108 uses the bidirectional screw 106 to squeeze the piston telescopic bladder 300, the piston telescopic bladder 300 stores elastic potential energy after being squeezed, which is released during the reverse movement to assist the movement of the baffle plate 108. This effectively increases the water-pushing force of the baffle plate 108 and makes up for the problem of insufficient thrust caused by the slow rotation speed of the main shaft when the wind speed is too low.

[0054] Furthermore, the inlet / outlet pipe 301 serves as a gas flow channel, enabling gas exchange between the piston telescopic bladder 300 and the external environment. The regulating valve 302, located outside the water tank 105, is used to regulate the gas flow rate and pressure of the inlet / outlet pipe 301. It can flexibly control the gas replenishment efficiency of the piston telescopic bladder 300 according to actual working conditions. When there is too much gas inside the piston telescopic bladder 300 and the pressure is too high, the gas can be discharged by opening the regulating valve 302.

[0055] Considering that when using the airbag 202 for support, if the airbag 202 leaks, even with continuous gas flow, it will still be unable to support the moving plate 201, and therefore the moving groove 200 cannot be sealed. Therefore, if... Figure 6 As shown, a shape memory alloy 400 is fixedly connected inside the push airbag 202. One end of the shape memory alloy 400 is fixedly connected to the outside of the moving plate 201, and the other end of the shape memory alloy 400 passes through the outer wall of the push airbag 202 and is fixedly connected to the inner bottom wall of the moving groove 200.

[0056] Specifically, during use, the shape memory alloy 400 is a temperature-responsive material with a columnar or spiral structure distributed along the central axis of the propulsion airbag 202. At room temperature, it is in a contracted state and does not affect the normal expansion and contraction of the propulsion airbag 202. When the internal temperature of the cabin 100 reaches a set threshold or the propulsion airbag 202 leaks, resulting in insufficient air pressure, the shape memory alloy 400 will expand and deform, providing upward support force to replace the propulsion airbag 202 in pushing the moving plate 201 upward. This ensures that the moving slot 200 can be closed in time, avoiding heat dissipation regulation failure due to airbag malfunction and providing redundant protection for the system.

[0057] Example:

[0058] The shape memory alloy 400 uses temperature-responsive materials such as Ni-Ti alloy or other temperature-sensitive deformation metals, and has a columnar or spiral structure. When in a columnar structure, it has a diameter of 5mm and a length of 80mm, distributed along the central axis of the propulsion airbag 202. At a normal temperature of 25℃, it is in a contracted state, with its length contracted to 60mm, which does not affect the normal expansion and contraction of the propulsion airbag 202. When the temperature inside the engine compartment 100 rises to 60℃ due to the high load operation of the generator 103, or when the propulsion airbag 202 leaks due to aging of the seal, causing the air pressure to drop to 0.3M, the pressure will decrease. When the pressure is below Pa, the shape memory alloy 400 will undergo expansion deformation, restoring its length to 80mm and providing an upward support force of 150N. This force replaces the push airbag 202 in pushing the moving plate 201 up 15mm-30mm along the moving groove 200, completely sealing the moving groove 200. This increases the effective water pushing area of ​​the baffle plate 108 from the original 40% to 70%, and increases the water flow pushing volume by 67%. This ensures that the heat dissipation flow is replenished in a timely manner, preventing the generator 103 temperature from continuously rising due to airbag failure, and providing reliable redundancy protection for the system.

[0059] The technical solutions in the above-described embodiments of this application have at least the following technical effects or advantages: Compared with Embodiment 2, in this embodiment, through the linkage structure of the piston telescopic bladder 300 and the baffle plate 108, the mechanical energy of the baffle plate 108 reciprocating with the bidirectional screw 106 drives the piston telescopic bladder 300 to perform piston movement. In conjunction with the inlet and outlet air pipes 301 and the regulating valve 302, external gas is automatically drawn in and the air is replenished to the pushing airbag 202. There is no need to rely on the air pump 203 for continuous power supply, reducing additional energy consumption and lowering the system operation and maintenance costs. At the same time, the gas retained inside the piston telescopic bladder 300 can also form elastic support for the baffle plate 108. When the wind speed is too low and the transmission main shaft 102 rotates slowly, the elastic potential energy generated by the baffle plate 108 squeezing the piston telescopic bladder 300 will assist its movement, increase the water pushing force, and accelerate the water circulation speed composed of the water supply pipe 110 and the return water pipe 111, ensuring that the heat dissipation efficiency matches the heat demand of the generator 103 and avoiding heat dissipation failure under low wind speed conditions.

[0060] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A water cooling system for a wind power generator, comprising a nacelle (100), a gear box (101) is installed inside the nacelle (100), a transmission main shaft (102) is connected to the other end of the gear box (101), a generator (103) is installed inside the nacelle (100), the transmission main shaft (102) is connected with an output shaft of the generator (103) through a shaft coupling, characterized in that: The engine compartment (100) is equipped with a water tank (105) through a support structure. A double-acting screw (106) is rotatably connected to the center of the water tank (105). A baffle plate (108) is threaded onto the outside of the double-acting screw (106). One end of the double-acting screw (106) passes through the outer wall of the water tank (105) and is fixedly connected to a driven gear (107). A drive gear (104) is fixedly connected to the outside of the transmission shaft (102). The drive gear (104) meshes with the driven gear (107). A water-conducting heat dissipation shell (112) is fitted on the outside of the generator (103). A water supply pipe (110) is connected to the outside of the water tank (105). One end of the water supply pipe (110) is connected to the water inlet of the generator (103). The outlet of the water-conducting heat dissipation shell (112) is connected to the water inlet of the water tank (105) through a return water pipe (111). The baffle plate (108) has multiple movable slots (200) on its exterior. A movable plate (201) is slidably connected inside the movable slot (200). A push airbag (202) is fixedly connected to the bottom of the movable plate (201). An air pump (203) is fixedly connected above the water tank (105). An air outlet of the air pump (203) is connected to an air supply pipe (204). One end of the air supply pipe (204) away from the air pump (203) passes through the outer wall of the water tank (105) and is connected to an electrically controlled diversion valve pipe (205). The electrically controlled diversion valve pipe (205) is installed inside the baffle plate (108). Multiple air outlets of the electrically controlled diversion valve pipe (205) are respectively connected to the air inlets of multiple push airbags (202).

2. The water-cooling system for a wind turbine generator according to claim 1, characterized in that: Multiple piston telescopic bladders (300) are installed on the outside of the baffle plate (108). The air outlets of the multiple piston telescopic bladders (300) penetrate the outer wall of the baffle plate (108) and are connected to the push air bladder (202). The other end of the piston telescopic bladder (300) is fixedly connected to the inner wall of the water tank (105). The outside of the piston telescopic bladder (300) is connected to an air inlet / outlet pipe (301). The air inlet / outlet of the air inlet / outlet pipe (301) penetrates the outer wall of the water tank (105) and is connected to a regulating valve (302).

3. A water-cooling system for a wind turbine generator according to claim 2, characterized in that: A shape memory alloy (400) is fixedly connected inside the push airbag (202). One end of the shape memory alloy (400) is fixedly connected to the outside of the moving plate (201), and the other end of the shape memory alloy (400) passes through the outer wall of the push airbag (202) and is fixedly connected to the inner bottom wall of the moving groove (200).

4. A water-cooling system for a wind turbine generator according to claim 3, characterized in that: The baffle plate (108) has multiple water passage holes (500) on its outside, and a water passage one-way valve plate (501) is hinged to the outside of the water passage holes (500).

5. A water-cooling system for a wind turbine generator according to claim 1, characterized in that: A guide rod (109) is fixedly connected inside the water tank (105), and the guide rod (109) passes through the outer wall of the baffle plate (108).

6. A water-cooling system for a wind turbine generator according to claim 1, characterized in that: The support structure includes a bottom fixing seat (601), which is fixedly connected to the inner bottom wall of the cabin (100). At least four adjusting cylinders (602) are installed on the bottom fixing seat (601). The output shaft of the adjusting cylinder (602) is connected to a bearing seat (600) through a ball joint. The bidirectional lead screw (106) is placed on the bearing seat (600).

7. A water-cooling system for a wind turbine generator according to claim 1, characterized in that: The outlet of the return water pipe (111) is hinged with a water-blocking one-way valve plate (800).

8. A water-cooling system for a wind turbine generator according to claim 1, characterized in that: A first temperature sensor (700) is fixedly connected inside the water tank (105), and a second temperature sensor (701) is installed outside the generator (103).

9. A water-cooling system for a wind turbine generator according to claim 1, characterized in that: Multiple water-conducting heat dissipation fins (900) are fixedly connected inside the water-conducting heat dissipation shell (112).

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