Wind power generation system utilizing compressed air to store energy

Abstract

The utility model discloses a wind power generation system utilizing compressed air to store energy, which comprises a wind power generator, and an air storage module and an auxiliary cooling brake mechanism are arranged on the wind power generator. The auxiliary cooling brake mechanism comprises an air cooling disc arranged on the side face of the brake disc, the air cooling disc communicates with the air storage module through a pipeline, and an air guide opening is formed in the side, close to the brake disc, of the air cooling disc. The auxiliary cooling brake mechanism further comprises a guide connecting pipe and a lower connecting pipe which are fixedly installed on the installation cylinder, one end of the guide connecting pipe is connected with the air storage module through a switching assembly, and the other end of the guide connecting pipe is movably provided with a movable driving plate through a first connecting assembly. During braking, high-pressure air in the air storage module drives the speed reduction brake plate and the speed reduction pressing block to abut against the brake disc at the same time. According to the utility model, the brake is safer and more reliable.

Description

Technical Field

[0001] The utility model relates to a wind turbine, in particular to a wind power generation system utilizing compressed air to store energy. Background Art

[0002] A wind turbine is an electrical device that converts wind energy into mechanical work, which then drives the rotor to rotate, ultimately outputting alternating current. A wind turbine generally consists of a rotor, generator (including the device), stabiliser (tail), tower, speed limiter, and energy storage device.

[0003] Typically, in strong winds, wind turbines adjust the blade pitch based on wind direction and wind speed data. They also use a yaw system to adjust the rotor's orientation so it's not fully facing the wind to reduce wind impact. Braking systems also apply brakes to the rotor to protect the turbine structure. Typical braking systems utilize a combination of brake discs and brake pads to brake the rotor. Emergency braking of a high-speed rotor creates significant friction between the discs and pads. This friction can lead to excessive heat buildup on the disc surface, potentially affecting braking performance or causing deformation over time. In strong winds, as wind speeds continue to increase, the rotor's wind force gradually increases. This creates increasing forces on the brake discs and pads. If the brake discs fail or become worn and insufficiently effective, the rotor can continue to rotate at excessive speeds in strong winds, potentially breaking and flying off, posing a significant risk. Utility Model Content

[0004] The technical problem to be solved by the present invention is that, in view of the fact that the braking performance of existing wind turbines is prone to failure or insufficient braking force, the present invention provides a wind power generation system using compressed air energy storage that can assist the wind turbine braking device in performing reliable braking.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] A wind power generation system utilizing compressed air energy storage includes a wind turbine, the wind turbine being provided with an air storage module, an air compressor, a turbine, and a second generator. The air outlet of the air compressor is connected to the air inlet of the air storage module, the air outlet of the air storage module is connected to the turbine, the turbine is connected to the rotor of the second generator, a brake disc is mounted on the hub shaft of the wind turbine, the brake disc is provided with a brake caliper, and two brake pads are movably mounted on the brake caliper. The structural feature of the system is that the brake disc is also provided with an auxiliary cooling brake mechanism.

[0007] The auxiliary cooling brake mechanism includes an air-cooled disk arranged on the side of the brake disc, the air-cooled disk is connected to the air storage module through a pipeline, and an air guide port is opened on the side of the air-cooled disk close to the brake disc; the auxiliary cooling brake mechanism also includes a guide pipe and a lower pipe fixedly mounted on the mounting cylinder, one end of the guide pipe is connected to the air storage module via a switching component, and the other end is movably mounted with a movable drive plate via a connecting component 1, and a deceleration brake plate is mounted on the movable drive plate, one end of the lower pipe is connected to the air storage module via a switching component, and the other end is movably mounted with a deceleration pressure block via a connecting component 2. When braking, the high-pressure air in the air storage module drives the connecting component 1 and the connecting component 2 respectively, so that the deceleration brake plate presses against the brake disc from the side of the brake disc, and the deceleration pressure block presses against the brake disc radially from the brake disc.

[0008] The utility model utilizes the high-pressure air in the air storage module to respectively drive the connecting component 1 and the connecting component 2 when the wind turbine is braking, that is, when the wind turbine is braking, so that the deceleration brake plate presses against the brake disc from the side of the brake disc, and the deceleration pressure block presses against the brake disc from the radial direction of the brake disc, thereby keeping the state of the brake disc stable during braking, thereby improving the braking reliability and reducing the wear of the brake disc.

[0009] Furthermore, heat dissipation holes are radially provided on the brake disc, and an auxiliary deceleration mechanism is provided inside the heat dissipation holes, and the auxiliary deceleration mechanism includes a movable gear ring, a movable gear, a movable support plate, a linkage plate, a spring, a movable block and a paddle plate, the movable gear ring is installed in the middle of the brake disc, the movable gear is installed in the movable gear ring, and the movable gear is meshed with the movable gear ring, the paddle plate is fixedly installed on the outer periphery of the movable gear ring, one end of the movable support plate is hinged to the brake disc, and the other end is hinged to the movable block through the linkage plate, one end of the spring is connected to the brake disc, and the other end is connected to the movable block, the movable gear drives the movable gear ring, and when the paddle plate rotates with the movable gear ring, the paddle plate presses the movable block, and the movable block presses the brake disc, and the movable support plate is installed under the deceleration pressure block, and the deceleration pressure block presses or disengages from the brake disc through the movable support plate. In this way, the utility model can press the movable abutment plate through the deceleration pressure block, so that the movable abutment plate presses the brake disc to further prevent the brake disc from rotating. When braking is successful, the deceleration pressure block can be reset, and the movable abutment plate can be pushed outward. The linkage plate cooperates with the movable abutment plate to form an L-shaped limit block frame. The deceleration pressure block is positioned between two adjacent L-shaped limit blocks, further preventing the brake disc from rotating, that is, locking the brake disc for the second time, thereby improving braking safety and reliability.

[0010] Furthermore, the connecting assembly 1 includes a piston plate 1 and an extension plate slidably mounted within the guide tube. The piston plate 1 is mounted facing the incoming gas direction of the guide tube, and the extension plate is connected to the piston plate 1. When high-pressure gas enters the guide tube, the high-pressure gas acts on the piston plate 1, causing the piston plate 1 and the extension plate to move together, driving the connected movable drive plate to move toward the side of the brake disc.

[0011] Furthermore, a spring 1 is installed between the extension plate and the bottom plate of the guide tube to facilitate the resetting of the extension plate and the piston plate 1, so that the movable drive plate is separated from the brake disc.

[0012] Furthermore, the connecting assembly 1 further includes a constricted tube 1 installed in the guide tube, and the constricted tube 1 is installed on the air-facing surface of the piston plate 1. When high-pressure air passes through the constricted tube 1, the flow rate can be further increased, thereby increasing the impact force on the piston plate 1.

[0013] Furthermore, a drain pipe is installed on the guide pipe, and the drain pipe is connected to the air inlet of the air cooling plate through a pipeline. In this way, the high-pressure gas in the secondary gas storage tank can be introduced into the air cooling plate through the guide pipe and the drain pipe.

[0014] Furthermore, the second connecting assembly includes a second piston plate slidably mounted within the lower connecting pipe, and a second spring. The second piston plate is fixedly connected to the deceleration pressure block, and one end of the second spring is connected to the second piston plate, while the other end is connected to the bottom of the lower connecting pipe. When high-pressure gas is introduced into the lower connecting pipe, the high-pressure gas impacts the second piston plate, which compresses the second spring and moves the deceleration pressure block together until it presses against the brake disc.

[0015] Furthermore, the second connecting assembly further comprises a second constricted tube installed in the lower connecting tube, and the second constricted tube is installed on the air-facing surface of the piston plate 2. When high-pressure air passes through the second constricted tube, the flow rate can be further increased, thereby increasing the impact force on the piston plate 2.

[0016] Furthermore, a drain pipe is installed on the lower connecting pipe, and the drain pipe is connected to the air inlet of the air cooling plate through a connecting pipe. In this way, the high-pressure gas in the gas storage module can be introduced into the air cooling plate through the guiding pipe and the drain pipe.

[0017] Furthermore, the auxiliary cooling brake mechanism also includes a closed box, which is fixedly mounted on the lower connecting pipe, and a positioning block is telescopically mounted inside the closed box. When the positioning block is extended, the positioning block interferes with the deceleration pressure block and limits the deceleration pressure block, thereby ensuring that the brake disc is locked secondary by the deceleration pressure block.

[0018] Furthermore, the switching assembly includes a guide port arranged on the mounting cylinder, an inner guide cylinder installed in the mounting cylinder, a rotating cylinder installed in the inner guide cylinder, an extension tube arranged on the rotating cylinder, a transition port arranged on the inner guide cylinder, and a guide tube arranged on the rotating cylinder, the guide tube is connected to the air outlet of the air storage module, the extension tube is connected to the transition port, the rotating cylinder and the inner guide cylinder are coaxially installed, and a drive gear 1 is installed on the rotating shafts of the rotating cylinder and the inner guide cylinder, the drive gear 1 is engaged with the drive gear 2, and when the drive gear 2 drives the drive gear 1, the drive gear 1 is intermittently connected with the guide port with the transition port.

[0019] Furthermore, the wind turbine is also provided with a secondary air storage tank, the air outlet of the air storage module is simultaneously connected to the air inlet of the secondary air storage tank, and the air outlet of the secondary air storage tank is connected to the air inlet of the switching component.

[0020] Furthermore, a speed measuring plate is installed on the blade hub rotating shaft to monitor the rotation speed of the hub.

[0021] Compared with the prior art, the beneficial effects of the present invention are:

[0022] 1) The gas storage module of the utility model can be used to store high-pressure gas for use in conjunction with an air compressor, a turbine and a generator to generate electricity when the wind is insufficient or the electricity demand is at a peak. At the same time, an auxiliary cooling brake mechanism is provided. When the wind increases and is about to exceed the safety range, the auxiliary cooling brake mechanism cooperates with the brake disc to perform a point braking operation on the high-speed rotating wheel hub to slow down the rotation speed of the wheel hub. At the same time, during the point braking process, the high-pressure gas inside the secondary gas tank and the auxiliary cooling brake mechanism are used to accelerate the air flow on the surface of the brake disc to speed up the dissipation of heat during the braking process. When the wind continues to increase and exceeds the safety range, the auxiliary cooling brake mechanism is used to cooperate with the brake disc to perform a point braking and deceleration operation on the wheel hub, and the brake caliper is controlled to cooperate with the brake pad and the brake disc to brake the wheel hub. After the wheel hub is successfully braked, the auxiliary cooling brake mechanism is controlled to cooperate with the brake disc to perform a secondary locking operation on the wheel hub to ensure the braking effect of the wheel hub in a strong wind environment and improve the stability and safety after braking.

[0023] 2) When the wind is strong enough, the blades of the utility model rotate and convert mechanical energy into electrical energy through generator 1. Part of the generated electrical energy is used to meet electricity demand, and the excess electrical energy drives the air compressor to compress the outside air and store it in the air storage module. When the compressed air inside the air storage module is full, the excess compressed air enters the secondary air storage tank for storage for subsequent auxiliary cooling of the brake mechanism and the auxiliary deceleration mechanism to cooperate with the auxiliary brake locking and the cooling of the brake disc. When the wind is weak or the electricity demand is at a peak, the high-pressure air in the air storage module is released and drives the turbine to rotate. When the turbine rotates, it drives generator 2 to operate to convert mechanical energy into electrical energy to meet electricity demand.

[0024] 3) The utility model uses an auxiliary cooling brake mechanism. When the wind force increases and is about to exceed the safety range, the high-pressure gas stored in the secondary air tank enters the guide pipe and the lower pipe to drive the deceleration brake plate and the deceleration pressure block, and cooperates with the switching component, the brake disc and the auxiliary deceleration mechanism to perform a point braking operation on the wheel hub. The point braking can ensure the deceleration and braking effect of the wheel hub while reducing the heat generated during braking: during the point braking process, the high-pressure gas repeatedly drives the deceleration brake plate and the deceleration pressure block to move to brake the wheel hub. The high-pressure gas entering the guide pipe and the lower pipe is discharged through the discharge pipe and enters the air-cooled disc and then blows onto the surface of the brake disc to accelerate the dissipation of heat on the surface of the brake disc; when the wind force continues to increase and exceeds the safety range, the deceleration brake plate and the deceleration pressure block cooperate with the brake disc to perform a point braking operation on the wheel hub to slow down its rotation speed, while controlling the brake caliper and brake pad to cooperate with the brake disc to stop the wheel hub. After the wheel hub stops, the positioning block cooperates with the deceleration pressure block and the auxiliary deceleration mechanism to perform a secondary locking operation on the wheel hub to ensure the stability and safety of the wheel hub after stopping.

[0025] 4) When the wind force increases and is about to exceed the safety range, the auxiliary deceleration mechanism of the utility model can drive the deceleration brake plate and the brake disc to intermittently contact to realize the braking operation of the wheel hub by high-pressure gas entering the guide pipe and the lower pipe when the wind force increases and is about to exceed the safety range. At the same time of braking, the deceleration pressure block intermittently contacts the movable resistance plate, and the movable resistance plate resists the brake disc under the action of the arc spring to increase the friction of the contact surface and improve the braking and deceleration effect of the wheel hub. When the wind force continues to increase and exceeds the safety range, the deceleration brake plate and the deceleration pressure block cooperate to perform deceleration of the wheel hub, and the brake caliper and the brake pad cooperate with the brake disc to stop the wheel hub. After the wheel hub stops, the linkage plate and the movable resistance plate are lifted and stretched open by the movable resistance plate in cooperation with the movable gear and the shift plate. The deceleration pressure block limited by the positioning block resists the movable resistance plate or is stuck between the L-shaped limit block frame formed by two adjacent movable resistance plates and the linkage plate, thereby realizing a secondary locking operation of the wheel hub after braking, thereby ensuring the stability and safety of the wheel hub after braking. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0027] Figure 1 This is a schematic structural diagram of a wind power generation system utilizing compressed air energy storage according to the present invention;

[0028] Figure 2 This is a schematic diagram of the installation of the gas storage module of the utility model;

[0029] Figure 3 This is a schematic structural diagram of the gas storage module of the utility model;

[0030] Figure 4 This is a schematic diagram of the installation of the brake caliper of the present invention;

[0031] Figure 5 This is a schematic diagram of the installation of the brake disc of the utility model;

[0032] Figure 6 This is a schematic diagram of the structure of the auxiliary cooling brake mechanism of the utility model;

[0033] Figure 7 This is a schematic diagram of the installation of the air cooling plate of the utility model;

[0034] Figure 8 This is a schematic diagram of the installation of the deceleration brake plate of the utility model;

[0035] Figure 9 This is a schematic structural diagram of the connecting component 1 and the connecting component 2 of the present invention;

[0036] Figure 10 This is a schematic diagram of the driving structure of the switching component of the utility model;

[0037] Figure 11 This is a schematic diagram of the principle structure of the switching component of the utility model;

[0038] Figure 12 It is a structural diagram of the auxiliary speed reduction mechanism of the utility model.

[0039] Figure: 1, nacelle; 11, hub; 12, blade; 13, generator 1; 2, tower; 21, air compressor; 22, turbine; 23, generator 2; 24, secondary air tank; 3, air storage module; 31, pipe pile; 32, pile top flange; 33, reinforcement ring 1; 34, reinforcement ring 2; 35, head; 36, maintenance ladder; 37, manhole; 38, reinforcement ring 3; 4, connecting shaft; 41, speed measuring plate; 5, brake disc; 51, brake caliper; 52, brake pad; 53, heat dissipation hole; 6, auxiliary cooling brake mechanism; 61, air cooling plate; 62, connecting pipe; 622, connecting pipe; 63, fixing frame; 631, installation tube; 632, guide pipe; 633, inner Guide cylinder; 634, rotating cylinder; 635, extension tube; 636, driving gear one; 637, driving gear two; 638, guide port; 64, guide tube; 641, movable drive plate; 642, deceleration brake plate; 643, necking tube one; 644, piston plate one; 645, extension plate; 646, spring one; 65, lower tube; 651, piston plate two; 652, spring two; 653, deceleration pressure block; 654, necking tube two; 655, closing box; 656, positioning block; 66, drain pipe; 7, auxiliary deceleration mechanism; 71, movable ring gear; 72, movable gear; 73, movable back plate; 74, linkage plate; 75, arc spring; 76, movable block; 77, shift plate. DETAILED DESCRIPTION

[0040] The present invention will be further described below in conjunction with specific preferred embodiments, but the scope of protection of the present invention is not limited thereby.

[0041] In the description of this utility model, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific direction, be constructed, or operate in a specific direction. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0042] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections; they can refer to direct connections, indirect connections through an intermediate medium, or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0043] Reference Figure 1An embodiment of a wind power generation system utilizing compressed air energy storage according to the present invention includes a nacelle 1, with a hub 11 movably mounted on one side of the nacelle 1, and three blades 12 rotatably mounted on the hub 11. A generator 13 is disposed within the nacelle 1. Wind force acts on the blades 12, driving them to rotate. The rotation of the blades 12 is increased by a gearbox, driving the rotor in the generator 13 to rotate, converting mechanical energy into electrical energy for output. A tower 2 is fixedly mounted at the bottom of the nacelle 1, and an air storage module 3 is disposed at the bottom of the tower 2. The air storage module 3 is used to store compressed air.

[0044] Reference Figure 2 Inside tower 2, an air compressor 21, a turbine 22, a second generator 23, and a secondary air storage tank 24 are fixedly installed. The air inlet of air compressor 21 communicates with the outside air, while the air outlet of air compressor 21 is connected to the air inlet of air storage module 3. The air outlet of air storage module 3 is connected to the air inlets of turbine 22 and secondary air storage tank 24. The output shaft of turbine 22 is connected to the rotor of second generator 23. When wind speed is sufficient, blades 12 rotate, and mechanical energy is converted into electrical energy through generator 1 13. Part of the generated electrical energy is output to meet electricity demand, and part is used to drive air compressor 21 to compress outside air and store it in air storage module 3. When wind speed is insufficient or electricity demand is peak, and the electricity generated by generator 1 13 is insufficient to meet power demand, the high-pressure air in air storage module 3 is released and drives turbine 22 to rotate. The rotation of turbine 22 drives generator 23 to convert the mechanical potential energy of the high-pressure air into electrical energy to meet electricity demand.

[0045] like Figure 3 As shown, the gas storage module 3 includes a pipe pile 31 arranged under the tower 2. The pipe pile 31 is a hollow structure for storing high-pressure gas. A pile top flange 32 is fixedly installed on the top of the pipe pile 31, and the pile top flange 32 is fixedly connected to the tower 2 by fasteners. A head 35 is provided at both ends of the inner cavity of the pipe pile 31, so that a closed cavity for storing high-pressure gas is formed in the pipe pile 31. In order to ensure the sealing of the connection between the head 35 and the pipe pile 31, the connection between the head 35 and the pipe pile 31 is butt-welded, and the weld is a full penetration weld or a fillet weld. Air holes are opened on both sides of the pipe pile 31, and a reinforcement ring 1 33 is fixedly installed at the air hole on one side, and a reinforcement ring 2 34 is fixedly installed at the air hole on the other side. The reinforcement ring 1 33 and the reinforcement ring 2 34 are both welded to the air hole, and the head 35 is connected to the two air holes through a pipe. A manhole 37 is provided in the middle of the pile 31, and a maintenance ladder 36 is fixedly installed on the pile 31. The maintenance ladder 36 and the manhole 37 are used to facilitate maintenance personnel to carry out maintenance. The bottom of the pile 31 is provided with a drainage hole, and a reinforcement ring 38 is fixedly installed at the drainage hole. The drainage hole can be used to drain air and sludge.

[0046] Reference Figure 4 - Figure 6 The hub 11 is fixedly mounted on one end of the connecting shaft 4, and a speed measuring plate 41 is fixedly mounted on the other end of the connecting shaft 4. The speed measuring plate 41 can be used to monitor the speed of the operating status of the fan hub 11.

[0047] A brake disc 5 is fixedly mounted on the connecting shaft 4. A brake caliper 51 is mounted on the brake disc 5. Two brake pads 52 are movably mounted on the caliper 51. The brake pads 52 are hydraulically driven to clamp the brake disc 5, thereby braking the brake disc 5, the connecting shaft 4, and the wheel hub 11. A temperature sensor is fixedly mounted on the brake disc 5 and electrically connected to an external controller to monitor the temperature of the brake disc 5. Heat dissipation holes 53 are evenly distributed throughout the brake disc 5. These holes increase the surface area of ​​the brake disc 5 in contact with air, thereby improving its heat dissipation efficiency. The brake disc 5 is also equipped with an auxiliary cooling brake mechanism 6. This assists the brake disc 5 in braking the connecting shaft 4, assists in locking the connecting shaft 4 when wind speed is excessive, and assists in cooling the brake disc 5 during braking. An auxiliary deceleration mechanism 7 is located within the heat dissipation holes 53 of the brake disc 5. This assists in both braking and locking the brake disc 5 in conjunction with the auxiliary cooling brake mechanism 6.

[0048] When there is sufficient wind, the gas storage module 3 is used in conjunction with the air compressor 21 to convert excess electrical energy into high-pressure gas and store it. When there is insufficient wind or during peak electricity demand, the gas storage module 3 is used in conjunction with the turbine 22 and the generator 23 to convert the potential energy of the stored high-pressure gas into electrical energy to meet electricity demand. When the wind speed increases and is about to exceed the safety range, the auxiliary cooling brake mechanism 6 is used to cooperate with the brake disc 5 to perform a braking operation on the high-speed rotating wheel hub 11 to slow down the rotation speed of the wheel hub 11. In addition, during the braking process, the high-pressure gas inside the secondary air tank 24 and the auxiliary cooling brake mechanism 6 are used to accelerate the air flow on the surface of the brake disc 5 to speed up the dissipation of heat during the braking process. At the same time, when the wind speed continues to increase and exceeds the safety range, the auxiliary cooling brake mechanism 6 is used to cooperate with the brake disc 5 to perform a braking and deceleration operation on the wheel hub 11, while controlling the brake caliper 51 to cooperate with the brake pad 52 and the brake disc 5 to brake the wheel hub 11. After the wheel hub 11 is successfully stopped, the auxiliary cooling brake mechanism 6 is controlled to cooperate with the brake disc 5 to perform a secondary locking operation on the wheel hub 11 to ensure the braking effect of the wheel hub 11 in a strong wind environment and improve the stability and safety after braking.

[0049] Reference Figure 7 - Figure 11The auxiliary cooling brake mechanism 6 includes two air-cooled discs 61 respectively arranged on both sides of the brake disc 5. The air-cooled discs 61 are hollow structures. Air guide ports are evenly arranged on the side of the air-cooled disc 61 close to the brake disc 5. The air guide ports can guide air to the surface of the brake disc 5 to accelerate the dissipation of heat on the surface of the brake disc 5 during braking. The air inlet of the air-cooled disc 61 is connected to the secondary air tank 24 through a connecting pipe 62, and a one-way valve is provided on the pipe connecting the connecting pipe 62 and the secondary air tank 24. For convenient connection, connecting pipes 622 are fixedly installed at both ends of the connecting pipe 62. A fixing frame 63 is fixedly installed inside the engine room 1 by fasteners, and a mounting cylinder 631 is fixedly installed on the fixing frame 63. Mounting cylinders 631 are respectively provided on both sides of the air-cooled disc 61. Two guide tubes 64 and a lower tube 65 are fixedly mounted on the mounting tube 631 via three guide openings 638. The two guide tubes 64 are symmetrically arranged on the mounting tube 631, and the angle between them is preferably set at 120°. To facilitate braking, the three guide openings 638 are evenly spaced along the circumference of the mounting tube 631. Preferably, the angle between each two adjacent guide openings 638 is 120°, and each of the two guide tubes 64 and the lower tube 65 is fixedly connected to a guide opening 638. A movable drive plate 641 is movably mounted on the outer side of the guide tube 64, and a deceleration brake plate 642 is fixedly mounted on the movable drive plate 641. The guide tube 64 is a hollow structure, and a connecting assembly 1 is provided inside it. The movable drive plate 641 is movably mounted on the guide tube 64 via the connecting assembly 1. When the connecting assembly 1 is subjected to the high-pressure gas pressure entering the guide tube 64, the connecting assembly 1 moves, and brings the movable drive plate 641 and the deceleration brake plate 642 against the brake disc 5 from the side of the brake disc. The lower tube 65 is also a hollow structure, and a deceleration pressure block 653 is movably mounted on the lower tube 65. The lower tube 65 also has a connecting assembly 2. The deceleration pressure block 653 is movably mounted on the lower tube 65 via the connecting assembly 2. When the connecting assembly 2 is subjected to the high-pressure gas pressure entering the lower tube 65, the connecting assembly 2 moves, and brings the deceleration pressure block 653 against the brake disc 5 in the radial direction. A switching component is provided inside the mounting cylinder 631 , and the switching component can realize the intermittent supply of compressed air to realize the braking and brake locking operations of the brake disc 5 .

[0050] The connecting assembly 1 includes a constricted tube 1 643, a piston plate 1 644, and an extension plate 645, which are slidably mounted within the guide tube 64. The piston plate 1 644 is mounted facing the incoming air flow direction of the guide tube. The constricted tube 1 643 is mounted on the air-facing surface of the piston plate 1 644, and the extension plate 645 is connected to the air-repelling surface of the piston plate 1 644. When high-pressure air is input into the guide tube 64, it flows through the constricted tube 1 643, further increasing the air pressure. The pressurized air acts on the piston plate 1 644, causing it and the extension plate 645 to move. This, in turn, moves the movable drive plate 641 toward the brake disc 5, causing the deceleration brake plate 642 to press against the brake disc 5 from the side. A spring 1 646 is installed between the extension plate 645 and the bottom plate of the guide tube 64 to facilitate the return of the piston plate 1 644 and the extension plate 645.

[0051] The second connecting component includes a second shrinking tube 654, a second piston plate 651, and a second spring 652 that are slidably installed inside the lower connecting tube 65. The second piston plate 651 is installed facing the incoming air direction of the lower connecting tube 65. The second shrinking tube 654 is installed on the air-facing surface of the second piston plate 651. The back-to-air surface of the second piston plate 651 is fixedly connected to the deceleration pressure block 653. One end of the second spring 652 is connected to the back-to-air surface of the second piston plate 651, and the other end is connected to the bottom of the lower connecting tube 65. When high-pressure air is input into the lower connecting pipe 65, the high-pressure air then flows through the second constricted pipe 654, so that the gas pressure is further increased. The pressurized gas acts on the second piston plate 651 to move the second piston plate 651 and the deceleration pressure block 653, and finally presses against the brake disc 5 along the radial direction of the brake disc 5. After the high-pressure air in the lower connecting pipe 65 flows out through the drain pipe 66, the second piston plate 651 returns to its original position under the action of the second spring 652, and the deceleration pressure block 653 separates from the brake disc 5.

[0052] Both the guide tube 64 and the lower tube 65 are provided with a drain pipe 66. This drain pipe 66 is connected to the air inlet of the air cooling plate 61 via a connecting pipe 622 and the connecting pipe 62. This allows the high-pressure gas in the secondary air tank 24, after being transferred and processed through the guide tube 64 or the lower tube 65, to be delivered to the air cooling plate 61 via the drain pipe 66. The gas is then blown through the air guide port of the air cooling plate 61 toward the brake disc 5, thereby cooling the brake disc 5. To prevent gas backflow, a one-way valve is installed on the pipe connecting the air cooling plate 61 and the drain pipe 66.

[0053] A closed box 655 is fixedly installed on the lower connecting pipe 65, and a positioning block 656 is movably installed inside the closed box 655. The positioning block 656 is driven by a hydraulic telescopic rod, and the hydraulic telescopic rod is electrically connected to the external controller. Under the action of the hydraulic telescopic rod, the positioning block 656 can extend to the interior of the lower connecting pipe 65 and interfere with the deceleration pressure block 653 to realize the brake locking operation.

[0054] When wind speed increases and approaches a safe range, high-pressure gas stored in the secondary air tank 24 enters the guide tube 64 and lower tube 65 to drive the deceleration brake plate 642 and deceleration pressure block 653, which in turn cooperate with the switching assembly, brake disc 5, and auxiliary deceleration mechanism 7 to apply a braking action to the wheel hub 11. This braking action ensures effective deceleration and braking of the wheel hub 11 while reducing heat generated during braking. During the braking action, the high-pressure gas repeatedly drives the deceleration brake plate 642 and deceleration pressure block 653 to brake the wheel hub 11. The high-pressure gas entering the guide tube 64 and lower tube 65 is discharged through the drain pipe 66 and enters the air cooling plate 61. It is then blown toward the surface of the brake disc 5 through the air guide port to accelerate heat dissipation from the surface of the brake disc 5. When wind speed continues to increase and exceeds a safe range, the deceleration brake plate 642 and deceleration pressure block 653 cooperate with the brake disc 5 to apply a braking action to the wheel hub 11, slowing its rotation while controlling the brake caliper 51 and brake pad 52 to cooperate with the brake disc 5 to stop the wheel hub 11. When the wheel hub 11 stops, the positioning block 656 cooperates with the deceleration pressure block 653 and the auxiliary deceleration mechanism 7 to perform a secondary locking operation on the wheel hub 11 to ensure the stability and safety of the wheel hub 11 after the stop.

[0055] The switching assembly includes a mounting cylinder 631, an inner guide cylinder 633, and a rotating cylinder 634. The mounting cylinder 631 is fixedly mounted on the fixed frame 63. The inner guide cylinder 633 and rotating cylinder 634 are sequentially rotated within the mounting cylinder 631 and coaxially mounted. Three extension tubes 635 are evenly mounted along the circumference of the rotating cylinder 634, with the angle between each two adjacent extension tubes 635 being 120°. Transition ports (not shown) are provided on the inner guide cylinder 633 at positions corresponding to the extension tubes 635. The extension tubes 635 are fixedly connected to the transition ports on the inner guide cylinder 633. A flow guide tube 632 for connecting to the secondary air tank 24 is also fixedly mounted on the rotating cylinder 634. A driving gear 2 637 is rotatably installed in the mounting cylinder 631, and the driving gear 2 637 is driven by a servo motor; a driving gear 1 636 is rotatably installed on the common rotating shaft of the inner guide cylinder 633 and the rotating cylinder 634, and the driving gear 1 636 and the driving gear 2 637 are engaged with each other. When the servo motor driving gear 2 637 rotates one circle, the driving gear 1 636 rotates one-third of a circle, that is, the driving gear 1 636 drives the inner guide cylinder 633 and the rotating cylinder 634 to rotate one-third of a circle, so that the transition port on the inner guide cylinder 633 is intermittently connected with the guide port 638 on the mounting cylinder 631, and the high-pressure gas in the secondary gas storage tank 24 intermittently enters the guide pipe 64 and the lower pipe 65. When the wind speed increases and is about to exceed the safety range, the high-pressure gas in the secondary gas tank 24 intermittently enters the interior of the guide tube 64 and the lower tube 65 through the switching component. The deceleration brake plate 642 and the deceleration pressure block 653 move toward the brake disc 5 under the action of the high-pressure gas to perform the braking and deceleration operation. In this process, due to the mutual engagement of the driving gear 2 637 and the driving gear 1 636, the inner guide cylinder 633 rotates regularly, so that the transition port on the inner guide cylinder 633 and the guide port 638 on the mounting cylinder 631 are intermittently connected, and the high-pressure gas can only intermittently enter the guide tube 64 and the lower tube 65. Therefore, the high-pressure gas can only intermittently drive the deceleration brake plate 642 and the deceleration pressure block 653, and on this basis cooperate with the brake disc 5 and the auxiliary deceleration mechanism 7 to perform a braking operation on the wheel hub 11; when the guide port 638 on the mounting cylinder 631, that is, the inlet of the guide pipe 64 and the lower pipe 65 is closed, the deceleration brake plate 642 and the deceleration pressure block 653 move to reset, and at the same time, the gas inside the guide pipe 64 and the lower pipe 65 enters the air-cooled disk 61 through the discharge pipe 66 and is blown to the surface of the brake disc 5 through the air guide port on the air-cooled disk 61 for cooling, so as to realize the cooling operation of the brake disc 5.

[0056] like Figure 12As shown, the auxiliary deceleration mechanism 7 includes a movable ring gear 71, a movable gear 72, a movable abutment plate 73, a linkage plate 74, an arc spring 75, a movable block 76, and a paddle plate 77. The movable ring gear 71 and the movable gear 72 are rotatably mounted inside the brake disc 5. The movable gear 72 is driven by a servo motor, which is electrically connected to an external controller. The movable ring gear 71 is internally meshed with the movable gear 72. Paddle plates 77 are evenly fixedly mounted on the outer periphery of the movable ring gear 71. The movable abutment plate 73, the linkage plate 74, the arc spring 75, the movable block 76, and the paddle plate 77 are mounted in a group in the heat dissipation hole 53 of the brake disc 5. A plurality of movable abutment plates 73 are evenly arranged on the outer periphery of the brake disc 5, and the deceleration pressure block 653 is mounted relative to the movable abutment plates 73. The deceleration pressure block 653 presses against or releases from the brake disc 5 via the movable abutment plates 73. One end of the movable abutment plate 73 is hinged to the heat dissipation hole 53, and the other end is hingedly mounted to a linkage plate 74 and a movable block 76. The movable plate 76 is connected to the heat dissipation hole 53 via an arc spring 75. The angle between two adjacent movable abutment plates 73 is 30°. When the movable block 76 slides under pressure, the linkage plate 74 pushes the movable abutment plates 73 outward, and the linkage plate 74 and movable abutment plates 73 cooperate to form an L-shaped limit stop. When the wind force increases and is about to exceed the safety range, the high-pressure gas enters the guide tube 64 and the lower tube 65 to drive the deceleration brake plate 642 to intermittently contact the brake disc 5 to achieve the braking operation of the wheel hub 11. At the same time, the deceleration pressure block 653 is intermittently in contact with the movable abutment plate 73. When the deceleration pressure block 653 is in contact with the movable abutment plate 73, the movable abutment plate 73 abuts against the outer periphery of the brake disc 5, increasing the friction force of the contact surface of the brake disc 5, thereby improving the braking and deceleration effect of the wheel hub 11. When the wind force continues to increase and exceeds the safety range, the deceleration brake plate 642 and the deceleration pressure block 653 cooperate to perform braking and deceleration on the wheel hub 11. After deceleration, the brake caliper 51 and the brake pad 52 cooperate with the brake disc 5 to stop the wheel hub 11. After the wheel hub 11 stops, the movable gear 72 is driven, and the movable ring gear 71 rotates accordingly. The shift plate 77 outside the movable ring gear 71 rotates to push the movable block 76, and the movable block 76 lifts and stretches the movable support plate 73 through the linkage plate 74. The deceleration pressure block 653 limited by the positioning block 656 is against the movable support plate 73 or is stuck between the two adjacent movable support plates 73 and the L-shaped limit block frame formed by the linkage plate 74, realizing the secondary locking operation of the wheel hub 11 after braking, thereby ensuring the stability and safety of the wheel hub 11 after braking.

[0057] When the present invention is in use, when there is sufficient wind, the blades 12 rotate and convert mechanical energy into electrical energy through the generator 13. Part of the generated electrical energy is used to meet electricity demand, and part of the electrical energy drives the air compressor 21 to compress the external air and store it in the air storage module 3. When the compressed air in the air storage module 3 is fully stored, the excess compressed air enters the secondary air storage tank 24 for storage. When the wind is insufficient or the electricity demand is at a peak, the high-pressure air in the air storage module 3 is released to drive the turbine 22 to rotate. When the turbine 22 rotates, it drives the generator 23 to operate and convert mechanical energy into electrical energy to meet electricity demand.

[0058] When the external wind sensor (speed measuring plate 41) detects that the wind speed is increasing and is about to exceed the safety range, the pitch angle of the blade 12 is adjusted through the slurry collection system of the wind turbine, and the compressed gas inside the secondary air storage tank 24 is simultaneously allowed to enter the guide port 638 of the mounting tube 631 through the pipeline and the switching component. The high-pressure gas entering the guide port 638 then enters the inside of the guide pipe 64 and the lower pipe 65. The high-pressure gas entering the guide pipe 64 and the lower pipe 65 drives the deceleration brake plate 642 and the deceleration pressure block 653 on the movable drive plate 641 to contact the brake disc 5, thereby slowing down the rotation speed of the brake disc 5 through friction and achieving a braking effect. At the same time, the deceleration pressure block 653 intermittently contacts the movable abutment plate 73 of the auxiliary deceleration mechanism 7. Under the elastic force of the arc spring 75, the movable abutment plate 73 abuts against the brake disc 5 to increase the friction force, thereby improving the deceleration effect on the brake disc 5.

[0059] When the high-pressure gas drives the deceleration brake plate 642 and the deceleration pressure block 653 to move toward the brake disc 5, the servo motor is controlled to drive the driving gear 2 637 to rotate. When the driving gear 2 637 rotates, it drives the driving gear 1 636 engaged therewith to rotate. During the rotation of the driving gear 1 636, the inner guide cylinder 633 is driven to rotate regularly and synchronously. When the inner guide cylinder 633 rotates, the extension pipe 635 and the guide port 638 are intermittently connected or staggered. When the extension pipe 635 and the guide port 638 are staggered, the gas inlet of the guide pipe 64 and the lower pipe 65 is closed, and the one-way valve on the discharge pipe 66 is opened synchronously to fill the gas in the guide pipe 64 and the lower pipe 65. High-pressure gas is discharged through the discharge pipe 66 and blown onto the surface of the brake disc 5, accelerating air flow on the surface of the brake disc 5 and speeding up the dissipation of heat generated by braking friction. At the same time, the deceleration brake plate 642 and the deceleration pressure block 653 move back to their original position under the elastic force of the spring 1 646 and the spring 2 652, and separate from the brake disc 5 and the movable abutment plate 73, thereby releasing the speed limit on the brake disc 5. As the inner guide tube 633 rotates, the high-pressure gas repeatedly enters the guide tube 64 and the lower tube 65, driving the deceleration brake plate 642 and the deceleration pressure block 653 to repeatedly contact and disengage from the brake disc, thereby achieving a braking operation on the blades 12 when the wind is strong.

[0060] When the external wind sensor (speed measuring plate 41) detects that the wind force continues to increase and exceeds the safe range, the wind turbine yaw system controls the blades 12 to rotate to a position parallel to the wind direction, and controls the retracting system to adjust the pitch angle of the blades 12. Synchronously, the hydraulic system is controlled to drive the brake pads 52 on the brake caliper 51 to move toward both sides of the brake disc 5 surface and adhere to the brake disc 5 to brake the brake disc 5 by friction. At the same time, high-pressure gas is controlled to enter the guide pipe 64 and the lower pipe 65 to drive the deceleration brake plate 642 and the deceleration pressure block 653 to cooperate with each other to perform a point braking and deceleration operation on the brake disc 5.

[0061] When the wheel hub 11 brakes successfully and stops rotating, the high-pressure gas pipeline is closed, and the high-pressure gas in the guide pipe 64 and the lower pipe 65 is discharged through the drain pipe 66, and the deceleration brake plate 642 and the deceleration pressure block 653 move to reset. At the same time, the hydraulic telescopic rod is controlled to drive the positioning block 656 to move inside the lower pipe 65, so that the positioning block 656 interferes with the deceleration pressure block 653 and prevents the deceleration pressure block 653 from moving, that is, the deceleration pressure block 653 is limited. On this basis, the servo motor can be controlled to drive the movable gear 72 to rotate and drive the movable gear ring 71 to rotate by engaging with the movable gear ring 71. When the movable ring gear 71 rotates, it drives the shift plate 77 to move and squeeze the movable block 76 to slide. When the movable block 76 slides, it cooperates with the linkage plate 74 to push the movable retaining plate 73 outward and resist it. The linkage plate 74 cooperates with the movable retaining plate 73 to form an L-shaped limit block. The limited deceleration pressure block 653 is positioned between two adjacent L-shaped limit blocks. In this way, when the brake caliper 51 and the brake pad 52 cooperate with the brake disc 5 to brake the wheel hub 11, the deceleration pressure block 653 cooperates with the movable retaining plate 73 and the linkage plate 74 to perform a secondary locking on the wheel hub 11, thereby ensuring stability and safety after braking.

[0062] During the braking process, if the temperature sensor detects that the surface temperature of the brake disc 5 is too high, the one-way valve on the pipe connecting the air-cooled disc 61 and the secondary air tank 24 is opened while braking, and high-pressure gas flows through the pipe to the air-cooled disc 61 and sprays onto the surface of the brake disc 5 to accelerate the dissipation of heat from the surface of the brake disc 5 and ensure the normal use of the brake disc 5 in the future.

[0063] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can, without departing from the scope of the present invention, utilize the technical content disclosed above to make many possible changes and modifications to the present invention, or modify it into an equivalent embodiment with equivalent changes. Therefore, any simple modification, equivalent change, and modification of the above embodiment made in accordance with the essence of the present invention without departing from the content of the present invention should fall within the scope of protection of the present invention.

Claims

1. A wind power generation system utilizing compressed air energy storage, comprising a wind turbine, wherein the wind turbine is provided with an air storage module (3), an air compressor (21), a turbine (22), and a second generator (23), wherein the air outlet of the air compressor is connected to the air inlet of the air storage module, the air outlet of the air storage module is connected to the turbine, the turbine is connected to the rotor of the second generator, a brake disc (5) is installed on the blade hub rotating shaft of the wind turbine, a brake caliper (51) is provided on the brake disc (5), and a brake pad (52) is movably installed on the brake caliper (51), characterized in that: The brake disc (5) is also provided with an auxiliary cooling brake mechanism (6); The auxiliary cooling brake mechanism (6) includes an air cooling plate (61) arranged on the side of the brake disc (5), the air cooling plate (61) is connected to the air storage module (3), and an air guide port is opened on the side of the air cooling plate (61) close to the brake disc (5); the auxiliary cooling brake mechanism (6) also includes a guide pipe (64) and a lower pipe (65) fixedly mounted on the mounting tube (631), one end of the guide pipe (64) is connected to the air storage module (3) through a switching component, and the other end is connected to the lower pipe (65) through a connecting rod. A movable drive plate (641) is movably mounted on the connecting component 1, a deceleration brake plate (642) is mounted on the movable drive plate (641), one end of the lower connecting pipe (65) is connected to the air storage module (3) via a switching component, and a deceleration pressure block (653) is movably mounted on the other end via the connecting component 2. When braking, the high-pressure air in the air storage module (3) drives the connecting component 1 and the connecting component 2 respectively, so that the deceleration brake plate presses against the brake disc from the side of the brake disc, and the deceleration pressure block presses against the brake disc from the radial direction of the brake disc.

2. The wind power generation system utilizing compressed air energy storage according to claim 1, characterized in that: The brake disc (5) is provided with heat dissipation holes along the radial direction, and an auxiliary deceleration mechanism (7) is provided inside the heat dissipation holes. The auxiliary deceleration mechanism (7) comprises a movable gear ring (71), a movable gear (72), a movable abutment plate (73), a linkage plate (74), a spring (75), a movable block (76) and a shift plate (77). The movable gear ring is installed in the middle of the brake disc, the movable gear is installed in the movable gear ring, and the movable gear is meshed with the movable gear ring, and the shift plate is fixedly installed on the outer periphery of the movable gear ring. The movable plate is hinged to the brake disc at one end and hinged to the movable block at the other end via the linkage plate. One end of the spring is connected to the brake disc and the other end is connected to the movable block. The movable gear drives the movable gear ring. When the shift plate rotates with the movable gear ring, the shift plate presses the movable block, and the movable block presses the brake disc. The movable shift plate (73) is installed below the deceleration pressure block (653), and the deceleration pressure block (653) presses or separates from the brake disc via the movable shift plate.

3. The wind power generation system utilizing compressed air energy storage according to claim 1, characterized in that: The connecting assembly 1 includes a piston plate 1 (644) and an extension plate (645) slidably installed in the guide tube (64). The piston plate 1 (644) is installed facing the incoming gas direction of the guide tube, and the extension plate (645) is connected to the piston plate 1 (644).

4. The wind power generation system utilizing compressed air energy storage according to claim 3, characterized in that: A spring (646) is installed between the extension plate and the bottom plate of the guide tube.

5. The wind power generation system utilizing compressed air energy storage according to claim 3, characterized in that: The connecting assembly 1 also includes a shrinking tube 1 (643) installed in the guide tube (64), and the shrinking tube 1 (643) is installed on the gas-facing surface of the piston plate 1 (644).

6. The wind power generation system utilizing compressed air energy storage according to claim 5, characterized in that: A drain pipe (66) is installed on the guide pipe (64), and the drain pipe (66) is connected to the air inlet of the air cooling plate (61) through a pipeline.

7. The wind power generation system utilizing compressed air energy storage according to claim 1, characterized in that: The second connecting assembly includes a second piston plate (651) and a second spring (652) slidably mounted inside the lower connecting pipe (65). The second piston plate is fixedly connected to the deceleration pressure block. One end of the second spring is connected to the second piston plate, and the other end is connected to the bottom of the lower connecting pipe.

8. The wind power generation system utilizing compressed air energy storage according to claim 7, characterized in that: The second connecting assembly further comprises a second shrinking tube (654) installed in the lower connecting tube (65), and the second shrinking tube (654) is installed on the air-facing surface of the second piston plate (651).

9. The wind power generation system utilizing compressed air energy storage according to claim 8, characterized in that: A drain pipe (66) is installed on the lower connecting pipe (65), and the drain pipe (66) is connected to the air inlet of the air cooling plate (61) through a connecting pipe (62).

10. The wind power generation system utilizing compressed air energy storage according to claim 1, characterized in that: The auxiliary cooling brake mechanism (6) further comprises a closed box (655), the closed box (655) being fixedly mounted on the lower pipe (65), and a positioning block (656) being telescopically mounted inside the closed box (655), and when the positioning block is extended, the positioning block interferes with the deceleration pressure block and limits the deceleration pressure block.

11. The wind power generation system utilizing compressed air energy storage according to claim 1, characterized in that: The switching assembly includes a guide port (638) arranged on the mounting cylinder, an inner guide cylinder (633) installed in the mounting cylinder, a rotating cylinder (634) installed in the inner guide cylinder, an extension tube (635) arranged on the rotating cylinder, a transition port arranged on the inner guide cylinder, and a guide tube (632) arranged on the rotating cylinder, wherein the guide tube is connected to the air storage module (3), the extension tube is connected to the transition port, the rotating cylinder and the inner guide cylinder are coaxially mounted, and a driving gear 1 (636) is installed on the rotating shafts of the rotating cylinder and the inner guide cylinder, the driving gear 1 is meshed with a driving gear 2 (637), and when the driving gear 2 drives the driving gear 1, the driving gear 1 brings the transition port into intermittent communication with the guide port.

12. The wind power generation system using compressed air energy storage according to any one of claims 1 to 11, characterized in that: The wind turbine is also provided with a secondary gas storage tank (24), the gas outlet of the gas storage module is simultaneously connected to the gas inlet of the secondary gas storage tank, and the gas outlet of the secondary gas storage tank is connected to the gas inlet of the switching component.

13. The wind power generation system using compressed air energy storage according to any one of claims 1 to 11, characterized in that: A speed measuring plate is installed on the blade hub rotating shaft.

Images