A tower mounted wind power generation system and control method thereof

Abstract

The present invention provides a tower-mounted wind power generation system and a control method thereof, comprising a main support structure, a vertical axis blade, a pitch control system, a blade control system, a fan blade protection system, a gear accelerator, a gear transmission and a generator, wherein the main support structure comprises a rotating rod arranged for vertical rotation, the vertical axis blade is rotatably connected to the pitch control system through the blade control system, the pitch control system is connected to the side wall of the rotating rod and arranged around the axis of the rotating rod, the bottom end of the rotating rod is sequentially connected to the gear accelerator, the gear transmission and the generator, and a data processing module for receiving data from a wind sensor at the top of the rotating rod and regulating the angle of the vertical axis blade and the gear position of the gear transmission according to the received data is arranged below the main support structure. The present invention produces the effect of improving the real-time power of the generator and ensuring the stability of the real-time power of the generator.

Description

Technical Field

[0001] The present invention relates to the technical field of small vertical axis wind power generation, and in particular to a tower-mounted wind power generation system and a control method thereof. Background Art

[0002] Vertical axis wind turbines are different from horizontal axis wind turbines. They can convert energy from wind coming from any direction without being restricted by wind direction. They adopt special aerodynamic principles, triangle vector method connection and direct drive structure principle, so that the force of the wind wheel is mainly concentrated on the hub, so the wind resistance is strong; the characteristics of this design are also reflected in the impact on the surrounding environment. There is no noise and low electromagnetic interference during operation, which makes the advantages of the new vertical axis wind turbine very obvious. In terms of power characteristics, the speed of the wind wheel increases faster (faster torque increase speed), and the speed of its power generation also increases accordingly. Under the same power, the rated wind speed of the vertical axis wind turbine is smaller than that of the existing horizontal axis wind turbine, and its power generation is also larger when it is running at low wind speed.

[0003] However, in the relevant technical solutions, especially in the adaptability of wind power generation devices to wind speed, although there are variable pitch and variable speed solutions to a certain extent, there are three common problems in the relevant technical solutions: first, the variable pitch structure is complex and the variable pitch angle is small, which cannot adapt to the complex and changeable wind force; second, the lack of sensing equipment makes it impossible to obtain wind data in real time and change the blade posture in time to adapt to the wind speed and maximize the utilization efficiency; third, the gear speed change solution has serious defects, with only a single acceleration and deceleration device, which cannot realize intelligent control of the rotation speed to adapt to the current wind speed. Summary of the invention

[0004] In view of the deficiencies existing in the prior art, the present invention provides a tower-mounted wind power generation system and a control method thereof, which solve the problems existing in the prior art of small pitch angle, untimely acquisition of wind data, and the inability of the reducer equipped with the generator to perform multi-gear intelligent adjustment according to the wind speed.

[0005] According to an embodiment of the present invention, a tower-mounted wind power generation system includes a main support structure, vertical axis blades, a pitch system, a blade control system, a blade protection system, a gear accelerator, a gear transmission and a generator. The main support structure includes a rotating rod arranged for vertical rotation. The vertical axis blades are rotatably connected to the pitch system through the blade control system. The pitch system is connected to the side wall of the rotating rod and arranged around the axis of the rotating rod. The bottom end of the rotating rod is sequentially connected to the gear accelerator, the gear transmission and the generator. A data processing module for receiving data from a wind sensor at the top of the rotating rod and adjusting the angle of the vertical axis blades and the gear position of the gear transmission according to the received data is arranged below the main support structure.

[0006] Preferably, the main body support structure further includes a chassis, a force-bearing support frame mounted on the chassis, and a hollow support column fixed to the top of the force-bearing support frame. The rotating rod is coaxially and rotatably installed in the hollow support column. A lift blade is vertically and rotatably installed on the rotating rod. The lift blades are evenly distributed around the axis of the rotating rod, and the lift blades are located below and inside the vertical-axis blade.

[0007] Preferably, the rotating rod is coaxially and rotatably installed with a rotating main shaft of a hollow structure. Both ends of the rotating main shaft are connected with support plates. The lift blades are rotatably installed between the movable ends of the two support plates. The lift blades are cylindrical. A rotating sub-shaft rotatably connected between the two support plates is arranged at the center of the lift blade. Both ends of the rotating sub-shaft are connected with fixing plates. An arc-shaped blade with a curved horizontal cross-section is connected between the two fixing plates. One end of the arc-shaped blade faces the rotating sub-shaft, and the arc-shaped blades are evenly distributed around the rotating sub-shaft.

[0008] Preferably, the pitch control system includes a fixed sleeve radially connected to the rotating rod, a lifting ring coaxially and slidably arranged on the rotating rod, a hinged rod hinged at one end to the lifting ring and rotatable in the horizontal direction, and a telescopic rod coaxially and slidably arranged in the fixed sleeve. The fixed sleeves are distributed around the axis of the rotating rod. The movable end of the telescopic rod is connected with a blade support body. The vertical-axis blade is rotatably connected to the blade support body. The other end of the hinged rod is hinged at the movable end of the telescopic rod. A screw-type telescopic device driven by a servo motor is installed on the rotating rod, and the movable end of the telescopic device is connected with the lifting ring.

[0009] Preferably, the blade support body is in a U shape. The vertical-axis blade is arranged inside the blade support body. An inclined reinforcing rib is arranged between the movable end of the telescopic rod and the blade support body.

[0010] Preferably, the blade control system includes an angle adjustment motor and a wireless transmitter arranged on the blade support body. The angle adjustment motor is wirelessly signal-connected to the data processing module through the wireless transmitter. The output shaft of the angle adjustment motor is coaxially driven and connected to one end of the rotating shaft of the vertical-axis blade.

[0011] Preferably, the main body support structure is located inside the fan blade protection system. The fan blade protection system includes a wind and sand protection net, a falling shock absorber, and a rain curtain. The bottom end of the wind and sand protection net is connected to the chassis. The wind and sand protection net is coaxially arranged with the rotating rod. The falling shock absorber covers the top of the wind and sand protection net. The rain curtain is arranged around the center of the falling shock absorber and distributed at the edge of the falling shock absorber. The wind and sand protection net includes vertical rods and thin plate rings connected to the vertical rods. The rain curtain is hinged to the shock absorber, and a torsion spring is connected to the hinge.

[0012] Preferably, the gear accelerator includes a transmission shaft, a base, two acceleration gear sets, an acceleration pad and an accelerator housing, each acceleration gear set includes a ring gear, an acceleration sun gear, an acceleration planetary gear and an acceleration planetary carrier, the ring gear is installed close to the inner wall of the accelerator housing, the acceleration pad is arranged between the two acceleration gear sets, the two acceleration gear sets are connected to the acceleration planetary carrier through the acceleration sun gear and the acceleration planetary carrier, the acceleration planetary carrier is connected to the acceleration planetary gear that meshes with the ring gear and the acceleration sun gear at the same time, the acceleration planetary carrier is the input end of the acceleration gear set, and the acceleration sun gear is the output end.

[0013] Preferably, the gear transmission comprises a primary reduction gear set, a secondary reduction gear set, a third acceleration gear set and a fourth acceleration gear set which are sequentially connected in transmission, wherein the primary reduction gear set and the secondary reduction gear set adopt the driving wheel of the sun gear, the third acceleration gear set and the fourth acceleration gear set adopt the planetary carrier as the input end, the planetary carriers of the secondary reduction gear set and the third acceleration gear set are arranged mirror-symmetrically along the pad between the secondary gear reduction gear set and the third acceleration gear set, and the two planetary carriers are transmission connected, an annular lock plate clutch is fixedly arranged in the housing of the gear transmission, the primary reduction gear set, the secondary reduction gear set, the third acceleration gear set and the fourth acceleration gear set A floating gear ring is provided inside, and the floating gear ring is located in the lock plate clutch, a gap is provided between the outer peripheral surface of the floating gear ring and the inner wall of the lock plate clutch, the lock plate clutch includes a fixed part fixedly connected to the inner wall of the gear transmission and a movable part coaxially slidably arranged on the inner wall of the gear transmission, the fixed part is provided with an electromagnetic coil for energizing and adsorbing the movable part, the fixed part and the movable part are respectively located on both sides of the floating gear ring, and are both annular, the inner diameters of the fixed part and the movable part are smaller than the outer diameter of the floating gear ring, and annular friction plates are connected to the side of the fixed part and the movable part relative to the floating gear ring, and the power on and off of the electromagnetic coil is controlled by the data processing module.

[0014] A control method for a tower-mounted wind power generation system, comprising the following control method:

[0015] Step 1: Detection: The wind force is obtained by rotating the wind sensor on the top of the rod. The wind sensor transmits the wind speed data wirelessly to the data processing module. The data processing module compares the wind force with the set wind force and adjusts the pitch control system and the blade control system.

[0016] Step 2: Speed ​​increase adjustment: when the wind speed detected by the wind sensor is low, the telescopic device in the variable pitch system contracts, driving the lifting ring to move downward, and the lifting ring drives the telescopic rod to move to the outside of the fixed sleeve through the hinged rod, thereby increasing the torque and the rotation speed of the rotating rod; at the same time, the angle adjustment motor in the blade control system drives the vertical axis blade to rotate to 0°, that is, the vertical axis blade is perpendicular to the rotation direction of the rotating rod;

[0017] Step 3: deceleration adjustment. When the wind speed detected by the wind sensor is large, the telescopic device in the pitch control system extends to drive the lifting ring to move upward. The lifting ring drives the telescopic rod to move toward the inside of the fixed sleeve through the hinged rod, reducing the torque and the rotation speed of the rotating rod. At the same time, the angle adjustment motor in the blade control system drives the vertical axis blade to rotate to 90°, that is, the vertical axis blade is tangent to the rotation direction of the rotating rod.

[0018] Step 4: Power generation regulation. When the wind speed detected by the wind sensor is relatively small, the data processing module controls the lock plate clutch at the third-stage acceleration gear group and the fourth-stage acceleration gear group to be energized, fixes the corresponding floating gear ring, and increases the speed of the output shaft; when the wind speed detected by the wind sensor is relatively small, the data processing module controls the lock plate clutch at the reduction gear group and the second-stage reduction gear group to be energized, fixes the corresponding floating gear ring, and reduces the speed of the output shaft.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. The torque of the vertical axis blade and the windward surface of the vertical axis blade are controlled respectively by the variable pitch system and the blade control system. According to the wind force signal detected in real time by the wind sensor, the structural stability of the wind power generation system is ensured while the power of the wind power generation system is ensured.

[0021] 2. The gear accelerator connected to the rotating rod is used to increase the input speed of the generator and improve the real-time power of the generator.

[0022] 3. The gear transmission is adjusted in real time according to the wind speed. The gear transmission is adjusted through the data processing module to further regulate the input speed of the generator, balance the generator power, and avoid insufficient generator power or the real-time generator power exceeding the maximum limit.

[0023] 4. The fan blade protection system can reduce the wear and tear of wind, sand and rain on the fan blades. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic structural diagram of an embodiment of the present invention.

[0025] Figure 2 Schematic diagram of the internal structure of an embodiment of the present invention.

[0026] Figure 3 Schematic diagram of the structure of the pitch system in an embodiment of the present invention.

[0027] Figure 4 It is a schematic diagram of the structure when the vertical axis blade is at an angle of 0° in an embodiment of the present invention.

[0028] Figure 5It is a schematic diagram of the structure when the vertical axis blade is at an angle of 90° in an embodiment of the present invention.

[0029] Figure 6 Schematic diagram of the structure of the fan blade protection system in an embodiment of the present invention.

[0030] Figure 7 1 is an exploded view of a gear accelerator in an embodiment of the present invention.

[0031] Figure 8 Schematic diagram of the structure of the lock plate clutch of the gear transmission in an embodiment of the present invention.

[0032] Fig. 9 It is a schematic structural diagram of a planetary carrier transmission-connected between a two-stage reduction gear set and a three-stage acceleration gear set in an embodiment of the present invention.

[0033] Fig.10 Schematic diagram of the structure of the generator in the embodiment of the present invention.

[0034] In the above drawings: 1. Main support structure; 11. Chassis; 12. Force support frame; 13. Hollow support column; 14. Blade support body; 15. Lift blade; 16. Wind sensor; 17. Rotating rod; 2. Vertical axis blade; 3. Pitch system; 31. Articulated rod; 32. Fixed sleeve; 33. Lifting ring; 34. Telescopic rod; 4. Blade control system; 41. Angle adjustment motor; 5. Fan blade protection system; 51. Wind and sand net; 52. Falling shock absorber; 53. Rain curtain; 6. Gear accelerator; 61. Transmission shaft; 62. Base; 63. Gear ring; 64. Acceleration sun gear; 65. Acceleration planetary gear; 66. Acceleration planetary carrier; 67. Acceleration pad; 68. Accelerator housing; 69. Acceleration gear set; 7. Gear transmission; 75. Fixed ring; 76. Electromagnetic coil; 77. Floating gear ring; 78. Movable ring; 8. Generator. DETAILED DESCRIPTION

[0035] The technical solution of the present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0036] like Figure 1-10As shown, in order to realize large-scale pitch change of wind power blades and real-time multi-speed adjustment of the speed of generator input according to the wind speed. The present invention proposes a tower-mounted wind power generation system, including a main support structure 1, a vertical axis blade 2, a pitch system 3, a blade control system 4, a fan blade protection system 5, a gear accelerator 6, a gear transmission 7 and a generator 8. The main support structure 1 includes a rotating rod 17 arranged for vertical rotation, and the vertical axis blade 2 is rotatably connected to the pitch system 3 through the blade control system 4. The pitch system 3 is connected to the side wall of the rotating rod 17 and arranged around the axis of the rotating rod 17. The bottom end of the rotating rod 17 is sequentially connected to the gear accelerator 6, the gear transmission 7 and the generator 8. A data processing module for receiving data from a wind sensor 16 at the top of the rotating rod 17 and adjusting the angle of the vertical axis blade 2 and the gear position of the gear transmission 7 according to the received data is arranged below the main support structure 1.

[0037] The vertical axis blade 2 adopts a streamlined design, imitating the wing of an airplane, so that when the wind blows through the blade, an additional force perpendicular to the axis of rotation is generated (analogous to the generation of lift of an airplane), thereby increasing the rotation speed of the rotating rod 17 and increasing the utilization efficiency of wind energy.

[0038] The generator 8 is connected to a rectification and voltage stabilization system and a rechargeable battery for powering the wind power generation system. The rectification and voltage stabilization system is used to output the unstable voltage generated during power generation into a stable voltage, and to convert the AC power generated during power generation into AC or DC power of a specific frequency.

[0039] like Figure 1-2 As shown, in order to realize the self-starting of the vertical axis blade 2 under low wind speed conditions, the main support structure 1 also includes a chassis 11, a force support frame 12 installed on the chassis 11, and a hollow support column 13 fixed to the top of the force support frame 12, the rotating rod 17 is coaxially rotatably installed in the hollow support column 13, and the rotating rod 17 is vertically rotatably installed with lift blades 15, the lift blades 15 are evenly distributed around the axis of the rotating rod 17, and the lift blades 15 are located at the inner side and lower part of the vertical axis blade 2.

[0040] The lift blades 15 are arranged to assist the vertical axis blades 2 so as to facilitate the self-starting of the vertical axis blades 2 under low wind speed conditions.

[0041] The load-bearing support frame 12 is evenly distributed around the axis of the rotating rod 17 , and the outer wall of the load-bearing support frame 12 is connected to the shell. The input ends of the gear accelerator 6 , the gear transmission 7 and the generator 8 are all located inside the load-bearing support frame 12 .

[0042] like Figure 3-5As shown, in order to realize the low wind speed rotation of the lift blade 15. The rotating rod 17 is coaxially rotatably mounted with a rotating main shaft of a hollow structure, both ends of the rotating main shaft are connected with support plates, and the lift blade 15 is rotatably mounted between the movable ends of the two support plates, the lift blade 15 is cylindrical, and a rotating sub-shaft rotatably connected between the two support plates is arranged at the center of the lift blade 15, both ends of the rotating sub-shaft are connected with fixed plates, and an arc-shaped blade with a curved horizontal cross section is connected between the two fixed plates, and one end of the arc-shaped blade faces the rotating sub-shaft, and the arc-shaped blades are evenly distributed around the rotating sub-shaft.

[0043] The two support plates connected at both ends of the rotating main shaft adopt a design of thin top and thick bottom to ensure the stable rotation of the lift blade 15. The rotating main shaft is a hollow structure, and the middle part is coaxially connected to the rotating rod 17 through two bearings.

[0044] Since the vertical axis blade 2 is large in size, not easily blown, and has poor self-starting ability, a lift blade 15 is used. The lift blade 15 is blown by the wind first. The lift blade 15 is arranged at the lower inner side of the vertical axis blade 2. The lift blade 15 drives the rotating main shaft to rotate. During the rotation of the lift blade 15, a certain lift is provided to the vertical axis blade 2 with a streamlined horizontal cross section. The lift blade 15 acts as a Magnus effect blade. The arc blade on the rotating sub-axis in the lift blade 15 can rotate under the action of a small wind force. The principle of providing lift is based on the Magnus effect: a cylinder rotating at a constant speed in the air will drive the surrounding airflow to make circular motion. When the angular velocity vector of the rotating cylinder rotating along the sub-axis does not coincide with its revolution velocity vector along the main axis, a lateral force will be generated in the direction perpendicular to the plane composed of the rotation angular velocity vector and the translation velocity vector. This lateral force is the lift generated. When the rotation direction of the rotor on the windward side is opposite to the rotation direction of the windward side, a torque in the same direction is generated and it rotates. Since the lift blade 15 is arranged at the bottom of the inner side of the vertical axis blade 2, as the lift blade 15 rotates, it drives the surrounding airflow to impact the vertical axis blade 2, thereby realizing the self-starting of the vertical axis blade 2.

[0045] At the same time, compared with the existing lift blades, the lift blades 15 are installed through the support plate on the rotating main shaft. The lift blades 15 have a larger torque and thus a larger moment of inertia. Under the action of the same wind force, they can provide greater lift, which not only improves the utilization rate of wind energy, but also speeds up the self-starting speed of the power generation system and improves the power generation efficiency of the whole machine.

[0046] like Figure 1-5As shown in the figure, to achieve pitch adjustment of the vertical-axis blade 2. The pitch system 3 includes a fixed sleeve 32 radially connected to the rotating rod 17, a lifting ring 33 coaxially and slidably arranged on the rotating rod 17, a hinge rod 31 with one end hinged to the lifting ring 33 and rotatable in the horizontal direction, and a telescopic rod 34 coaxially and slidably arranged in the fixed sleeve 32. The fixed sleeves 32 are distributed around the axis of the rotating rod 17. The movable end of the telescopic rod 34 is connected to a blade support 14, and the vertical-axis blade 2 is rotatably connected to the blade support 14. The other end of the hinge rod 31 is hinged to the movable end of the telescopic rod 34. A screw-type expander driven by a servo motor is installed on the rotating rod 17, and the movable end of the expander is connected to the lifting ring 33.

[0047] In the screw-type expander, the connecting block threadedly engaged with the screw is connected to the lifting ring 33. By driving the screw to rotate through the servo motor, the lifting ring 33 is driven to move axially along the rotating rod 17. The movement of the lifting ring 33 drives the top end of the hinge rod 31 to linearly move axially along the rotating rod 17. The other end of the hinge rod 31 is hinged to the telescopic rod 34, that is, the telescopic rod 34 is correspondingly driven to extend or retract from the fixed sleeve 32, driving the blade support 14 to move, and further driving the vertical-axis blade 2 to move, achieving pitch adjustment. This system can support the lifting ring 33 to move up and down by 20 cm, and the torque of the vertical-axis blade 2 can be adjusted by 8 cm.

[0048] As Figure 1-5 shown in the figure, to improve the connection stability between the blade support 14 and the telescopic rod 34. The blade support 14 is in a U shape, the vertical-axis blade 2 is arranged inside the blade support 14, and an inclined reinforcing rib is provided between the movable end of the telescopic rod 34 and the blade support 14.

[0049] As Figure 4 and Figure 5 shown. The blade control system 4 includes an angle adjustment motor 41 arranged on the blade support 14 and a wireless transmitter. The angle adjustment motor 41 is wirelessly signal-connected to the data processing module through the wireless transmitter, and the output shaft of the angle adjustment motor 41 is coaxially传动连接 with one end of the rotating shaft of the vertical-axis blade 2.

[0050] According to the size of the wind speed, the posture of the vertical axis blade 2 is adjusted. When the wind speed is low, the vertical axis blade 2 is driven by the angle adjustment motor 41 to rotate to a direction perpendicular to the rotation direction of the rotating rod 17. At this time, the force area of ​​the vertical axis blade 2 is the largest and it is most easily blown by the wind; when the wind speed is high, the vertical axis blade 2 is driven by the angle adjustment motor 41 to rotate to a direction tangent to the rotation direction of the rotating rod 17. At this time, the force area of ​​the vertical axis blade 2 is the smallest, and it is most difficult to be blown by the wind. In addition, in order to prepare for the angle adjustment, a limit block can be arranged on the inner side of the blade support body 14 to limit the angle adjustment of the vertical axis blade 2.

[0051] like Figure 6 As shown, in order to realize the protection of the vertical axis blade 2. The main support structure 1 is located inside the fan blade protection system 5, and the fan blade protection system 5 includes a wind and sand net 51, a falling shock absorber 52 and a rain curtain 53. The bottom end of the wind and sand net 51 is connected to the chassis 11, the wind and sand net 51 is coaxially arranged with the rotating rod 17, the falling shock absorber 52 is covered on the top of the wind and sand net 51, and the rain curtain 53 is arranged around the center of the falling shock absorber 52 and distributed on the edge of the falling shock absorber 52. The wind and sand net 51 includes a vertical rod and a thin plate ring connected to the vertical rod. The rain curtain 53 is hinged on the falling shock absorber 52, and a torsion spring is connected to the hinge.

[0052] The wind and sand net 51 and the falling shock absorber 52 are mainly used to prevent high-speed flying solids such as falling objects and hail from damaging the fan blades. The rain curtain 53 is mainly used to reduce the probability of rainwater drifting into the device and reduce the corrosion of internal equipment by rainwater. When the rainwater is light, the rain curtain 53 is in an inclined state. When the rainwater is heavy, the rain curtain 53 is pushed downward by the wind and rainwater scouring. The rain curtain 53 is in a nearly vertical or vertical state. At this time, the probability of rainwater drifting into the device is reduced as much as possible. In addition to the protective function, the thin plate ring in the wind and sand net 51 can introduce straight wind and reduce the degree of wind chaos. The design of the thin plate can reduce the weakening effect on the wind.

[0053] like Figure 7 As shown, in order to increase the power of the generator 8, the gear accelerator 6 comprises a transmission shaft 61, a base 62, two acceleration gear sets 69, an acceleration pad 67 and an accelerator housing 68, each acceleration gear set 69 comprises a ring gear 63, an acceleration sun gear 64, an acceleration planetary gear 65 and an acceleration planet carrier 66, the ring gear 63 is installed close to the inner wall of the accelerator housing 68, the acceleration pad 67 is arranged between the two acceleration gear sets 69, the two acceleration gear sets 69 are connected to the acceleration planet carrier 66 through the acceleration sun gear 64, the acceleration planetary gear 65 meshing with the ring gear 63 and the acceleration sun gear 64 at the same time is connected to the acceleration planet carrier 66, and the acceleration planet carrier 66 is used as the input end of the acceleration gear set 69, and the acceleration sun gear 64 is used as the output end.

[0054] The ring gear 63 is fixed, with the accelerating planet carrier 66 as input and the accelerating sun gear 64 as output. The number of teeth of the ring gear 63 is 61, and the number of teeth of the sun gear is 29. According to the transmission ratio formula: ,in is the number of teeth on the ring gear, is the number of teeth on the sun gear, so the transmission ratio is 0.322. Since two gear sets are superimposed, the total transmission ratio is 0.322 squared, or 0.104.

[0055] like Figure 7-9 As shown, in order to achieve real-time adjustment of the output speed. The gear transmission 7 includes a primary reduction gear set, a secondary reduction gear set, a third acceleration gear set and a fourth acceleration gear set which are sequentially connected in transmission, wherein the primary reduction gear set and the secondary reduction gear set use the driving wheel of the sun gear, the third acceleration gear set and the fourth acceleration gear set use the planetary carrier as the input end, the planetary carriers of the secondary reduction gear set and the third acceleration gear set are arranged along the backing plate between the secondary gear reduction gear set and the third acceleration gear set in mirror symmetry, and the two planetary carriers are connected in transmission, an annular lock plate clutch is fixedly arranged in the housing of the gear transmission 7, and a floating gear ring 7 is arranged in the primary reduction gear set, the secondary reduction gear set, the third acceleration gear set and the fourth acceleration gear set. 7, and the floating gear ring 77 is located in the lock plate clutch, a gap is set between the outer peripheral surface of the floating gear ring 77 and the inner wall of the lock plate clutch, the lock plate clutch includes a fixed part fixedly connected to the inner wall of the gear transmission 7 and a movable part coaxially slidably arranged on the inner wall of the gear transmission 7, the fixed part is provided with an electromagnetic coil 76 for energizing and adsorbing the movable part, the fixed part and the movable part are respectively located on both sides of the floating gear ring 77, and are both annular, the inner diameters of the fixed part and the movable part are smaller than the outer diameter of the floating gear ring 77, and the fixed part and the movable part are connected to a ring-shaped friction plate on one side relative to the floating gear ring 77, and the on and off of the electromagnetic coil 76 is controlled by the data processing module.

[0056] The internal structure of the gear transmission 7 is similar to that of the gear accelerator 6, except that the first-stage reduction gear set and the second-stage reduction gear set use the sun gear as input and the planet carrier as output. At the same time, the ring gear is set as a floating ring gear 77. When the floating ring gear 77 is not fixed by a locking plate clutch, there is no relative rotation between the sun gear, the planet gear and the floating ring gear 77. The speed of the input end is the same as the speed of the output end, and no acceleration or deceleration is performed. The planet carrier arranged between the second-stage reduction gear set and the third-stage acceleration gear set is as shown in FIG. Fig. 9 As shown in , the ends of the two planet carriers are connected. In the two-stage reduction gear set, the planet carrier is used as the output, and in the three-stage acceleration gear set, the planet carrier is used as the input.

[0057] The fixed part and the movable part in the lock plate clutch are respectively a fixed ring 75 and a movable ring 78. The fixed ring 75 has an electromagnetic coil 76 built in. The fixed ring 75 is provided with an annular step for installing the friction plate. The side wall of the movable ring 78 is provided with an annular protrusion for installing the friction plate. The electromagnetic coil 76 is energized by controlling the data processing module. The movable ring 78 is adsorbed to the fixed ring 75 as a "washer". The floating gear ring 77 is fixed by the friction plate between the fixed ring 75 and the movable ring 78, so as to achieve an increase or decrease in speed.

[0058] In the first-stage reduction gear set and the second-stage reduction gear set, after the floating ring gear 77 is fixed, the sun gear is used as input and the planetary carrier is used as output to reduce speed; by fixing one or more floating ring gears 77 in the first-stage reduction gear set, the second-stage reduction gear set, the third-stage speed-increasing gear set, and the fourth-stage speed-increasing gear set, speed increase or deceleration of different gears can be achieved, thereby achieving intelligent speed regulation of the input end of the generator 8.

[0059] A control method for a tower-mounted wind power generation system, comprising the following control method:

[0060] Step 1: Detection: The wind force is obtained by the wind sensor 16 on the top of the rotating rod 17. The wind sensor 16 wirelessly transmits the wind speed data to the data processing module. The data processing module compares the wind force with the set wind force and adjusts the pitch control system 3 and the blade control system 4.

[0061] Step 2: speed increase adjustment. When the wind speed detected by the wind sensor 16 is small, the telescopic device in the pitch control system 3 contracts, driving the lifting ring 33 to move downward. The lifting ring 33 drives the telescopic rod 34 to move to the outside of the fixed sleeve 32 through the hinge rod 31, thereby increasing the torque and the rotation speed of the rotating rod 17. At the same time, the angle adjustment motor 41 in the blade control system 4 drives the vertical axis blade 2 to rotate to 0°, that is, the vertical axis blade 2 is perpendicular to the rotation direction of the rotating rod 17.

[0062] Step 3, deceleration adjustment. When the wind speed detected by the wind sensor 16 is relatively large, the telescopic device in the pitch control system 3 extends, driving the lifting ring 33 to move upward. The lifting ring 33 drives the telescopic rod 34 to move toward the inside of the fixed sleeve 32 through the hinge rod 31, thereby reducing the torque and the rotation speed of the rotating rod 17. At the same time, the angle adjustment motor 41 in the blade control system 4 drives the vertical axis blade 2 to rotate to 90°, that is, the vertical axis blade 2 is tangent to the rotation direction of the rotating rod 17.

[0063] Step 4: Power generation regulation. When the wind speed detected by the wind sensor 16 is relatively small, the data processing module controls the lock plate clutches at the third-stage acceleration gear set and the fourth-stage acceleration gear set to be energized, fixes the corresponding floating ring gear 77, and increases the rotation speed of the output shaft; when the wind speed detected by the wind sensor 16 is relatively small, the data processing module controls the lock plate clutches at the reduction gear set and the second-stage reduction gear set to be energized, fixes the corresponding floating ring gear 77, and reduces the rotation speed of the output shaft.

Claims

1. A tower-mounted wind power generation system, characterized in that: The invention comprises a main support structure (1), a vertical axis blade (2), a pitch control system (3), a blade control system (4), a blade protection system (5), a gear accelerator (6), a gear transmission (7) and a generator (8), wherein the main support structure (1) comprises a rotating rod (17) arranged to rotate vertically, the vertical axis blade (2) is rotatably connected to the pitch control system (3) through the blade control system (4), the pitch control system (3) is connected to the side wall of the rotating rod (17) and is arranged around the axis of the rotating rod (17), the bottom end of the rotating rod (17) is sequentially connected to the gear accelerator (6), the gear transmission (7) and the generator (8), and a data processing module for receiving data from a wind sensor (16) at the top of the rotating rod (17) and adjusting the angle of the vertical axis blade (2) and the gear position of the gear transmission (7) according to the received data is arranged below the main support structure (1); The pitch control system (3) comprises a fixed sleeve (32) radially connected to the rotating rod (17), a lifting ring (33) coaxially slidably arranged on the rotating rod (17), a hinged rod (31) one end of which is hinged to the lifting ring (33) and can rotate in the horizontal direction, and a telescopic rod (34) coaxially slidably arranged in the fixed sleeve (32), the fixed sleeve (32) is distributed around the axis of the rotating rod (17), the movable end of the telescopic rod (34) is connected to a blade support body (14), the vertical axis blade (2) is rotatably connected to the blade support body (14), the other end of the hinged rod (31) is hinged to the movable end of the telescopic rod (34), and a screw-type telescope driven by a servo motor is installed on the rotating rod (17), and the movable end of the telescope is connected to the lifting ring (33).

2. A tower-mounted wind power generation system as claimed in claim 1, characterized in that: The main support structure (1) further comprises a chassis (11), a load-bearing support rod (12) mounted on the chassis (11), and a hollow support column (13) fixed to the top of the load-bearing support rod (12); the rotating rod (17) is coaxially rotatably mounted in the hollow support column (13); lift blades (15) are vertically rotatably mounted on the rotating rod (17); the lift blades (15) are evenly distributed around the axis of the rotating rod (17); and the lift blades (15) are located below the inner side of the vertical axis blades (2).

3. A tower-mounted wind power generation system as claimed in claim 2, characterized in that: The rotating rod (17) is coaxially and rotatably installed with a rotating main shaft having a hollow structure. Both ends of the rotating main shaft are connected with support plates. Between the movable ends of the two support plates, a Magnus effect lift blade (15) is rotatably installed. The lift blade (15) is cylindrical. A rotating sub-shaft rotatably connected between the two support plates is arranged at the center of the lift blade (15). Both ends of the rotating sub-shaft are connected with fixing plates. An arc-shaped blade with a curved horizontal cross-section is connected between the two fixing plates. One end of the arc-shaped blade faces the rotating sub-shaft. The arc-shaped blades are evenly distributed around the rotating sub-shaft. The principle of providing lift is based on the Magnus effect: A cylinder rotating at a constant speed in the air will drive the surrounding fluid to move in a circular motion. When the angular velocity vector of the rotation of the rotating cylinder along the sub-shaft does not coincide with its revolution velocity vector along the main shaft, a lateral force will be generated in the direction perpendicular to the plane formed by the rotation angular velocity vector and the translational velocity vector. This lateral force is the generated lift. When the rotation directions of the rotor on the windward side and the leeward side are opposite, a co-directional torque is generated and it rotates.

4. A tower-mounted wind power generation system as claimed in claim 1, characterized in that: The blade support body (14) is in a U-shape. The vertical axis blade (2) is arranged inside the blade support body (14). An inclined reinforcing rib is arranged between the movable end of the telescopic rod (34) and the blade support body (14).

5. A tower-mounted wind power generation system as claimed in claim 4, characterized in that: The blade control system (4) includes an angle adjustment motor (41) and a wireless transmitter arranged on the blade support body (14). The angle adjustment motor (41) is wirelessly signal-connected to the data processing module through the wireless transmitter. The output shaft of the angle adjustment motor (41) is coaxially传动连接 with one end of the rotating shaft of the vertical axis blade (2).

6. A tower-mounted wind power generation system as claimed in claim 2, characterized in that: The main body support structure (1) is located inside the fan blade protection system (5). The fan blade protection system (5) includes a wind and sand protection net (51), a falling shock absorber (52), and a rain curtain (53). The bottom end of the wind and sand protection net (51) is connected to the chassis (11). The wind and sand protection net (51) is coaxially arranged with the rotating rod (17). The falling shock absorber (52) covers the top of the wind and sand protection net (51). The rain curtain (53) is arranged around the center of the falling shock absorber (52) and distributed at the edge of the falling shock absorber (52). The wind and sand protection net (51) includes vertical rods and a thin plate ring connected to the vertical rods. The rain curtain (53) is hinged on the shock absorber (52), and a torsion spring is connected to the hinge.

7. A tower-mounted wind power generation system as claimed in claim 1, characterized in that: The gear accelerator (6) comprises a transmission shaft (61), a base (62), two acceleration gear sets (69), an acceleration pad (67) and an accelerator housing (68). Each acceleration gear set (69) comprises a ring gear (63), an acceleration sun gear (64), an acceleration planetary gear (65) and an acceleration planet carrier (66). The ring gear (63) is installed close to the inner wall of the accelerator housing (68). The acceleration pad (67) is arranged between the two acceleration gear sets (69). The two acceleration gear sets (69) are connected to the acceleration planet carrier (66) through the acceleration sun gear (64). The acceleration planetary gear (65) is connected to the acceleration planet carrier (66) and is meshed with the ring gear (63) and the acceleration sun gear (64). The acceleration planet carrier (66) is connected to the acceleration gear set (69) with the acceleration planet carrier (66) as an input end and the acceleration sun gear (64) as an output end.

8. A tower-mounted wind power generation system as claimed in claim 1, characterized in that: The gear transmission comprises a primary reduction gear set, a secondary reduction gear set, a third acceleration gear set and a fourth acceleration gear set which are sequentially connected in transmission, wherein the primary reduction gear set and the secondary reduction gear set use the driving wheel of the sun gear, the third acceleration gear set and the fourth acceleration gear set use the planet carrier as the input end, the planet carriers of the secondary reduction gear set and the third acceleration gear set are arranged mirror-symmetrically along the pad between the secondary reduction gear set and the third acceleration gear set, and the two planet carriers are connected in transmission, an annular lock plate clutch is fixedly arranged in the housing of the gear transmission, and a floating gear ring (77) is arranged in the primary reduction gear set, the secondary reduction gear set, the third acceleration gear set and the fourth acceleration gear set, and the floating gear ring ( 77) is located in the lock plate clutch, and a gap is set between the outer peripheral surface of the floating gear ring (77) and the inner wall of the lock plate clutch. The lock plate clutch includes a fixed part fixedly connected to the inner wall of the gear transmission (7) and a movable part coaxially slidably set on the inner wall of the gear transmission. The fixed part is provided with an electromagnetic coil (76) for energizing and adsorbing the movable part. The fixed part and the movable part are respectively located on both sides of the floating gear ring (77) and are both annular. The inner diameters of the fixed part and the movable part are smaller than the outer diameter of the floating gear ring (77). The fixed part and the movable part are connected to an annular friction plate on one side relative to the floating gear ring (77). The power on and off of the electromagnetic coil (76) is controlled by the data processing module.

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