Rotor of a wind turbine

Abstract

A wind wheel of a wind power generator comprises a stand (10), a rotating main shaft (20), a wind wheel (30), a wind wheel support frame (40), a wind guide cover (50) and a wind guide cover support frame (60). The rotating main shaft (20) is rotatably sleeved in the stand (10). The wind wheel (30) has a wheel-shaped casing (34) with upper and lower end faces and an inner side face closed and only an outer side face open as a wind inlet. The wind guide cover (50) coaxially surrounds the periphery of the wind wheel (30) and communicates with the outer side of the wind wheel (30) to form a booster air duct with a wide outer part and a narrow inner part. The wind wheel (30) drives the rotating main shaft (20) to rotate and generate electricity. The wind wheel can reduce the loss of wind energy, increase the pressure by 2-3 times, and improve the power generation efficiency by more than 50%. The structure is compact and small in size, greatly reducing the installation and maintenance difficulty and cost. The opening and closing of the wind guide cover can be adjusted to solve the problem of unstable power generation.

Description

Technical Field

[0001] This invention relates to wind power generation equipment, and more particularly to wind turbine rotors. Background Technology

[0002] Wind power generation utilizes wind to rotate turbines, which in turn drive generators to produce electricity. It requires no fuel and produces no air pollution. Traditional wind turbine generators typically consist of a tower mounted vertically on the ground, a main unit mounted at the top of the tower, and rotor blades connected to the main unit. The rotor blades capture wind and transmit the wind power to the rotor shaft. These wind turbine generators are enormous; for example, a 600-kilowatt wind turbine has a tower height of 40-60 meters, each rotor blade measuring up to 20 meters in length, shaped like an airplane wing, and weighing 10-30 tons or even more. Transportation, installation, and maintenance are extremely difficult and costly.

[0003] The fluctuating strength of winds in nature leads to unstable and difficult-to-control power generation, resulting in poor power quality and low efficiency. To maximize the utilization of wind energy, current technologies generally employ blade pitch angle control systems and ensure that the wind turbine rotor always faces the direction of the strongest wind to improve efficiency. Even so, the efficiency of existing wind turbines is generally only around 20%, and the utilization rate of wind energy remains low. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a pressurized high-torque wind turbine that reduces the difficulty of installation and maintenance and can greatly improve the efficiency of wind energy utilization.

[0005] To solve the above-mentioned technical problems, the present invention provides a wind turbine rotor, characterized in that it includes a column, a rotating main shaft, a wind turbine blade, a wind turbine blade support frame, a wind guide shroud, and a wind guide shroud support frame; the rotating main shaft is rotatably fitted inside the column and partially extends out of the column; the wind turbine blade has a wheel-shaped housing formed by closed upper and lower end faces and a closed inner surface, with only the outer surface open as a wind inlet; the wheel-shaped housing is centered on the rotating main shaft, and a plurality of wind blades are arranged inside the wheel-shaped housing, all of which are radially arranged around the rotating main shaft. The wind turbine is evenly and vertically distributed; the wind guide shroud is coaxially surrounding the wind turbine, and the wind guide shroud includes several wind guide vanes. All the wind guide vanes are radially and evenly distributed vertically in a wheel shape, with the upper and lower ends closed. The outer side is open to form a wind inlet, and the inner side is connected to the outer side of the wind turbine to form a pressurized air duct that is wider on the outside and narrower on the inside. The outer end of the wind turbine support frame is connected to the wheel-shaped housing of the wind turbine, and the inner end is connected to the part of the rotating main shaft located outside the column, which drives the rotating main shaft to rotate and generate electricity. The wind guide shroud is rotatably or fixedly connected to the rotating main shaft through the wind guide shroud support frame.

[0006] The air guide shroud has pressurized flared openings symmetrically arranged back-to-back on both ends.

[0007] The angle between each blade and the diameter of the impeller passing through it is 15-45°.

[0008] Each blade is an arc-shaped blade.

[0009] Reinforcing baffles are sealed at both the upper and lower ends of each blade along the arc and chord length.

[0010] Each air guide vane of the air guide cover stands on the periphery of the air blade in a corresponding manner, with the inner side of the air guide vane close to the outer side of the air blade.

[0011] Each of the aforementioned air guide vanes is rectangular.

[0012] Each of the air guide vanes consists of a rectangular air guide vane body, a rectangular frame surrounding the air guide vane body, and a central axis of the air guide vane. The central axis of the air guide vane is located on the vertical central axis of the air guide vane body, and the two ends of the central axis of the air guide vane are rotatably connected to the rectangular frame.

[0013] The angle between the air guide vane and the diameter of the air guide shroud passing through it is 0-45 degrees.

[0014] Each of the air guide vanes can rotate around its own central axis under the drive of the air guide vane rotation mechanism to adjust the opening and closing size and angle of the air inlet.

[0015] The central axis of each air guide vane is fixedly sleeved within a rotating sprocket at its vertical central axis. The air guide vane rotation mechanism includes a motor, a pull rod, a rotating arm, the rotating sprocket, and a chain. The inner end of the pull rod is connected to the output shaft of the motor, and the outer end is rotatably connected to one end of the rotating arm. The other end of the rotating arm is connected to one of the central axes of the air guide vane, driving it to rotate. A chain surrounds and meshes with all the rotating sprockets, driving all the rotating sprockets to rotate synchronously.

[0016] The air guide vane rotation mechanism also includes several tension sprockets; a pair of tension sprockets are arranged on the outer side of each of the rotating sprockets, and the tension sprockets are all engaged on the chain and located on the opposite side of the rotating sprocket. The chain engagement sequence is tension sprocket - rotating sprocket - another tension sprocket; at least one of the pair of tension sprockets arranged on each of the rotating sprockets has a tension adjustment mechanism.

[0017] Each of the tension adjustment mechanisms includes a fixed slide and a fixed nut. A slider is slidably mounted on the slide. One side of the slider is connected to the shaft of the tension sprocket, and a screw is fixed on the other side. The nut is threadedly connected to the screw so that when the screw is turned, the screw drives the slider and the tension sprocket to move back and forth, thereby adjusting the tension of the chain.

[0018] The outer edge of the air guide shroud has two annular outer edge skeletons, and the inner edge of the air guide shroud has two annular inner edge skeletons, and the sealing plate is encapsulated on the upper and lower end faces of the outer edge skeleton and the inner edge skeleton; a reinforcing rib is connected between the outer edge skeleton and the inner edge skeleton on the same sealing plate; the two ends of the central shaft of the air guide vane and the sprocket are connected to the reinforcing rib; the motor is mounted on the motor mounting plate, and the motor mounting plate is mounted on two adjacent reinforcing ribs; for each pair of tensioning sprockets and tension adjustment mechanisms of each rotating sprocket, the nut and slide rail and the other tensioning sprocket are fixed to the reinforcing rib by the tensioning sprocket mounting plate.

[0019] The air guide vane rotation mechanism is located on the lower side of the lower end sealing plate of the air guide cover.

[0020] The connection method between the impeller support frame and the rotating main shaft is as follows: a connecting step protrudes radially outward on the part of the rotating main shaft that extends out of the column, and a cylindrical impeller sleeve with an open lower end is fixedly fitted on the connecting step. The impeller support frame is radially fixedly connected to the outer wall of the impeller sleeve. A through hole is provided at the center of the bottom surface of the impeller sleeve to accommodate the rotating main shaft passing through.

[0021] The rotating spindle and the column are rotatably connected by a flange protruding outward from the top of the column, which is connected to an inverted T-shaped bearing sleeve that is sleeved outside the rotating spindle. The bearing sleeve is lined with bearings between its two ends and the rotating spindle.

[0022] The inner surface of the bearing sleeve near the column is recessed to form a cavity for accommodating the bearing. A locking ring supporting the bearing is fixed below the bearing on the rotating main shaft at the top surface of the column. The upper inner surface of the bearing sleeve is recessed to form a stepped surface supporting the bearing, and a sealing plug is provided at the opening of the upper end face of the bearing sleeve.

[0023] The impeller support frame structure includes several side-standing right-angled trapezoidal connecting frames, which are radially distributed around the main rotating shaft. On each right-angled trapezoidal connecting frame, of the two parallel bases, the shorter base is connected to the part of the main rotating shaft that extends outside the column, and the longer base is fixedly connected to the inner side of the impeller's wheel-shaped housing.

[0024] The air guide shroud is rotatably connected to the rotating main shaft above it via the upper air guide shroud support frame, and is rotatably connected to the column below it via the lower air guide shroud support frame.

[0025] The rotatable connection structure between the air guide shroud and the rotating main shaft is as follows: an air guide shroud bearing sleeve is spaced outside the rotating main shaft; air guide shroud first rotating bearings are provided at both ends between the air guide shroud bearing and the rotating main shaft; a sealing plate is provided at the upper end of the air guide shroud, and a connecting reinforcing rib is provided on the sealing plate; the lower side of the outer end of the air guide shroud support frame is connected to the connecting reinforcing rib; a connecting plate is integrally provided at the inner end of the air guide shroud support frame, and the connecting plate is connected to the outer wall of the air guide shroud bearing sleeve.

[0026] The inner walls of the upper and lower ends of the air guide bearing sleeve are concave to form concave steps that limit the air guide bearing; below is a locking nut; the outer wall of the lower end of the air guide bearing sleeve protrudes to form a raised edge that supports the connecting plate.

[0027] Located below the impeller support frame, a cylindrical air guide shroud second bearing sleeve with open ends is fitted around the periphery of the column; below the air guide shroud, the upper side of the outer end of the air guide shroud support frame is connected to the connecting reinforcing rib below the lower end sealing plate of the air guide shroud, and the inner end of the air guide shroud support frame is integrally connected to the outer wall of the air guide shroud second bearing sleeve; an air guide shroud second bearing is provided between the air guide shroud second bearing sleeve and the column so that the air guide shroud support frame can rotate around the column.

[0028] The column has an integrally protruding bearing mounting seat on which the second bearing of the air guide shroud is mounted. A limit ring is also fixedly sleeved above the bearing mounting seat to limit the position of the second bearing of the air guide shroud. A limit cylinder is coaxially fixedly sleeved inside the second bearing sleeve of the air guide shroud to limit the position above the second bearing sleeve of the air guide shroud.

[0029] The top of the second bearing sleeve of the air guide is higher than the connecting plate and the limiting cylinder; a sealing end cover is installed at the gap between the top of the second bearing sleeve of the air guide and the column, and the sealing end cover is locked to the top of the second bearing sleeve of the air guide with screws; a sealing ring is pressed between the bottom of the sealing end cover and the protruding sealing step on the column; a downward dust cover is fitted on the sealing step to cover the sealing end cover.

[0030] The wind turbine rotor of this invention, due to its enclosed design, significantly reduces wind energy loss. Furthermore, the use of guide vanes to create a cross-ventilation-like airflow around the rotor blades, increasing pressure by 2-3 times and greatly enhancing the torque of the rotating shaft. This design is unaffected by wind direction changes, reducing the need for wind direction tracking systems and improving power generation efficiency by over 50%. This increased efficiency also significantly reduces the size of the generator for the same power output. The compact rotor structure and small size allow for various sizes to be manufactured to meet different power requirements, simplifying installation and maintenance and reducing costs.

[0031] Because of the further adoption of the air guide vane rotation mechanism, the rotation direction and speed of the motor can be adjusted according to the wind force, thereby adjusting the angle of the air guide vane and changing the air intake of the air duct. This solves the problem of unstable power generation due to fluctuating wind force. In the event of excessive wind force or extreme weather, the air guide vane can be closed to stop power generation. Attached Figure Description

[0032] Figure 1 This is a three-dimensional schematic diagram of the wind turbine rotor of the present invention after removing part of the flared end and the sealing plate.

[0033] Figure 2 This is a longitudinal sectional view of the wind turbine rotor of the wind turbine generator of the present invention.

[0034] Figure 3 for Figure 2 A magnified view of part A in the image.

[0035] Figure 4 for Figure 2 A magnified view of part B in the image.

[0036] Figure 5 This is a bottom view of the wind turbine rotor of the present invention after removing part of the enclosed plate at the lower end of the wind guide shroud.

[0037] Figure 6 This is a schematic diagram of the air guide vane rotation mechanism of the present invention.

[0038] Figure 7 This is a three-dimensional view of the wind turbine rotor's wind guide cover and flared mouth of the wind turbine of the present invention, with some components removed from the figure.

[0039] Figure 8 This is a partial three-dimensional schematic diagram of the air guide vane and its rotating mechanism of the present invention.

[0040] The technical feature names and their corresponding reference numerals are as follows:

[0041] 10. Column, 11. Flange, 12. Bearing sleeve, 121. Horizontal part, 122. Sealing plug, 13. Bearing, 14. Bearing mounting seat, 15. Sealing end cover, 16. Sealing ring, 17. Dust cover, 18. Sealing step, 19. Limiting ring.

[0042] Rotating main shaft 20, connecting step 21, impeller sleeve 22, locking nut 23, locking ring 24. Impeller 30, impeller blades 31, reinforcing baffle 32, wheel-shaped housing 34;

[0043] Wind turbine support frame 40, right-angled trapezoidal connecting frame 41, short base 411, long base 412, reinforcing rod 42;

[0044] Air guide shroud 50, air guide plate 51, air guide plate body 511, rectangular frame 512, air guide plate central shaft 513, outer edge skeleton 53, inner edge skeleton 54, sealing plate 55, reinforcing rib 56, motor mounting plate 57, tension sprocket mounting plate 58; air guide plate rotating mechanism 59: motor 591, pull rod 592, rotating arm 593, rotating sprocket 594, chain 595, tension sprocket 596, nut 597, slider 598, screw 599;

[0045] The wind guide shroud support frame 60, connecting reinforcing rib 61, connecting plate 62, connecting frame 63, wind guide shroud first bearing sleeve 65, limiting cylinder 651, wind guide shroud first rotating bearing 66, wind guide shroud second bearing 64, wind guide shroud second bearing sleeve 67, sealing ring 68.

[0046] 70mm flare. Detailed Implementation

[0047] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0048] Figure 1 , Figure 2 , Figure 5 This is an overall diagram of the wind turbine rotor of the wind turbine generator of the present invention. As can be seen from the diagram, the wind turbine rotor includes a column 10, a rotating main shaft 20, a wind turbine blade 30, a wind turbine blade support frame 40, a wind guide shroud 50, a wind guide shroud support frame 60, and a bell mouth 70. The column 10 is supported on the ground and is a hollow column. The rotating main shaft 20 is rotatably fitted inside the column 10. The lower end of the rotating main shaft 20 is the part connected to the generator, and the upper part extends out of the column to connect and fix the wind turbine rotor. The wind turbine blade 30 is connected to the rotating main shaft 20 through the wind turbine blade support frame 40, with the part protruding from the column. Under the action of wind, the wind turbine blade 30 rotates around and drives the rotating main shaft 20 to rotate, thereby generating electricity.

[0049] The impeller 30 has a wheel-shaped housing 34 formed by a closed upper and lower end face and a closed inner side, with only the outer side open as the air inlet. The wheel-shaped housing 34 is centered on the rotating main shaft 20, and contains several wind blades 31. All wind blades are vertically aligned with the rotating main shaft 20 and evenly distributed radially in a 360° circle, forming a circular wheel shape. Preferably, the angle between each wind blade and the diameter of the impeller passing through it is 30 degrees. However, this can be adjusted appropriately according to the size of the impeller, within the range of 15-45°. Each wind blade 31 is fixed to the wheel-shaped housing 34 to form a single, integrated wheel. In a preferred embodiment, to increase the wind-receiving area, each wind blade is preferably arc-shaped (with a rectangular projected surface) and closed at both ends. This better "catch" the wind, preventing immediate pressure relief when the wind blows, and allowing pressure relief only when the wind moves to a leeward position, thus maintaining wind direction and pressure and increasing torque. Reinforcing baffles 32 can also be sealed at both ends of each fan blade 31 along the arc and chord length to reinforce the blade and maintain its arc shape. When the fan blade has reinforcing baffles, the upper and lower reinforcing baffles can be locked together with the upper and lower sealing surfaces with screws for fixation. Between two adjacent fan blades 31, the outer distance is greater than the inner distance, forming an air duct that is wider on the outside and narrower on the inside, achieving a pressurization effect.

[0050] To connect the impeller to the rotating main shaft, the upper end of the rotating main shaft partially extends beyond the column. To connect the impeller 30 to the rotating main shaft, the present invention employs the impeller support frame 40. For example... Figure 1-3 As shown, the impeller support frame structure 40 includes several side-standing right-angled trapezoidal connecting frames 41, which are radially distributed around the main rotating shaft. On each right-angled trapezoidal connecting frame, of its two parallel bases, the shorter upper base 411 is connected to the portion of the main rotating shaft extending beyond the column, while the longer lower base 412 is fixedly connected to the inner sealing plate of the impeller 30. The hypotenuse 413 slopes upwards. To make the impeller support frame structure 40 form a more stable whole, a reinforcing rod 42 is connected to the top surface of every two adjacent right-angled trapezoidal connecting frames 41, with all the reinforcing rods forming a closed equilateral polygon.

[0051] like Figure 2-3As shown, the connection between the upper bottom 411 of the impeller support frame 40 and the rotating main shaft 20 is as follows: the rotating main shaft extends radially outward through a connecting step 21, and a cylindrical impeller sleeve 22 with an open lower end is fitted onto the connecting step 21, with the bottom surface of the impeller sleeve 22 locked onto the connecting step 21 by screws; the upper bottom 411 of each right-angled trapezoidal connecting frame 41 of the impeller support frame 40 is radially welded or fixed to the outer wall of the impeller sleeve 22 by screws; the center of the bottom surface of the impeller sleeve 22 has a through hole to accommodate the rotating main shaft 20 passing through. A locking nut 23 is provided above the impeller sleeve 22 to prevent the cylindrical impeller sleeve 22 from coming off.

[0052] Similarly, Figure 2-3 As shown, to allow the rotating main shaft 20 to rotate within the column 10, the rotatable structure between them is as follows: a flange edge 11 protrudes outward from the top of the column 10; an inverted T-shaped bearing sleeve 12 is attached above the top surface of the column, sleeved outside the rotating main shaft 20. The upper end of the bearing sleeve 12 is located below the connecting step 21, while the horizontal portion 121 protruding outward from the lower end is attached to the flange edge 11 at the top of the column. The two are interlocked by an annular step and axially locked with screws; the bearing sleeve 12 is located inside the impeller sleeve 22; bearings 13 are lined between the inner surfaces of the upper and lower ends of the bearing sleeve 12 and the rotating column main shaft, thus enabling smooth relative rotation between the two. The inner surface of the bearing sleeve 12 near the column is recessed to form a cavity to accommodate the bearing 13, and the bearing 13 is supported on the locking ring 24 on the rotating main shaft. The upper inner surface of the bearing sleeve 12 is recessed to form a stepped surface that supports the bearing 13, and a sealing plug 122 is provided at the open end of the upper surface of the bearing sleeve 12.

[0053] like Figure 1 , Figure 5 , Figure 7 , Figure 8As shown, the wind guide shroud 50 is coaxial and at the same height around the impeller 30, and the shroud is also wheel-shaped. The shroud includes several rectangular wind guide vanes 51, an outer frame 53, an inner frame 54, a sealing plate 55, and reinforcing ribs 56. Preferably, each wind guide vane 51 consists of a rectangular wind guide vane body 511, a rectangular frame 512 surrounding the wind guide vane body, and a wind guide vane central axis 513. The wind guide vane central axis 513 is fixedly set on the vertical central axis of the wind guide vane body 511. The rectangular frame of the wind guide vane can save the thickness of the wind guide vane while meeting the strength requirements. The two ends of the wind guide vane central axis are rotatably connected to the rectangular frame, so that the wind guide vane can rotate around its central axis. The outer edge frame 53 consists of two annular frames located on the outer edge of the air guide shroud, and the inner edge frame 54 consists of two annular frames located on the inner edge of the air guide shroud. The air guide vanes 51 are installed vertically, with their rectangular frames 512 mounted on the outer sides of the upper and lower outer edge frames 53 and the inner sides of the rectangular frames mounted on the inner edges of the upper and lower annular frames 54. This supports the wheel-shaped main body of the air guide shroud. All the air guide vanes 51 are radially and evenly distributed vertically in a circular wheel shape. Both the upper and lower end faces are closed with sealing plates 55, and the outer side is open to form an air inlet. Each air guide vane 51 of the air guide shroud 50 corresponds one-to-one with the wind blade 31 and stands around the wind blade 31. The inner side of the air guide vane is close to the outer side of the wind blade, so that the inner side of the air guide shroud 50 is connected to the outer side of the wind impeller 30 to form a pressurized air duct that is wider on the outside and narrower on the inside, further pressurizing the air duct. The air guide vane 51 does not contact the fan blade 31, and is spaced approximately 50 mm apart to avoid interference during rotation. Preferably, the angle between the air guide vane and the diameter of the air guide shroud passing through it can be adjusted between 0 and 45 degrees. Additionally, a reinforcing rib 56 is provided on the inner surface of the enclosed plate 55 at the location where the rectangular frame connects; the reinforcing rib 56 connects the inner edge frame 54 and the outer edge frame 53.

[0054] The air guide vane body 511 is embedded and fixedly installed in the rectangular frame 512. The invention objective can also be achieved if the air guide vane body 511 is fixed and does not rotate. However, as a preferred embodiment, the air guide vane 51 is rotatable, allowing for adjustment of opening and closing, and adjustment of the size and angle of the air inlet. Therefore, an air guide vane rotation mechanism 59 is also provided on the lower side of the lower end sealing plate of the air guide cover 50 (to prevent rain). Under its drive, all air guide vane bodies 511 can rotate around the central axis 513 of the air guide vane. Figure 5-8As shown, the air guide vane rotation mechanism 59 includes a motor 591, a pull rod 592, a rotating arm 593, a rotating sprocket 594, and a chain 595. Each air guide vane's central shaft 513 passes through a reinforcing rib 56 and a sealing plate 55, and is coaxially fixed within a rotating sprocket 594. A motor mounting plate 57 is connected between two adjacent reinforcing ribs 56, on which the motor 591 is mounted. The inner end of the pull rod 592 is connected to the output shaft of the motor 591, and its outer end is rotatably connected to one end of the rotating arm 593. The other end of the rotating arm 593 is connected to the air guide vane's central shaft 513, driving the air guide vane's central shaft 513 and the rotating sprocket 594 to rotate. A chain 595 surrounds and meshes with all the rotating sprockets. In this way, the rotation of the motor 591 can drive all the rotating sprockets to rotate synchronously, causing the air guide vanes to rotate accordingly. When the wind force is too strong, the air guide vanes can be closed, and power generation can be suspended to avoid damaging the equipment. The rotation of the motor is adjusted using commercially available wind speed sensors and control circuits.

[0055] The air guide vane rotating mechanism 59 also includes a pair of tension sprockets 596 on the outer side of each rotating sprocket 594, which are fixed to the reinforcing rib 56 by a tension sprocket mounting plate 58. The tension sprockets mesh with the chain 595 and are located opposite each other on both sides of the rotating sprocket. Figure 5 , Figure 6 , Figure 8 As shown, the rotating sprocket 594 is close to the outer edge frame 53, and the tensioning sprocket is close to the inner edge frame 54. The chain engagement sequence is tensioning sprocket - rotating sprocket - another tensioning sprocket. In each pair of tensioning sprockets 596 configured with each rotating sprocket 594, one has a tension adjustment mechanism. Each tension adjustment mechanism includes a slide (not shown) fixed to the tensioning sprocket mounting plate 58 and a fixed nut 597. A slider 598 is slidably mounted on the slide. One side of the slider is connected to the shaft of the tensioning sprocket, and the other side is fixed with a screw 599. The nut 597 is threadedly connected to the screw 599. When the screw is turned, the screw drives the slider and the tensioning sprocket to reciprocate, thereby adjusting the tension of the chain 595.

[0056] See Figure 1-4 As shown, the wheel-shaped air guide shroud 50 is rotatably connected to the rotating main shaft 20 above it via the radial air guide shroud support frame 60 passing over the impeller 30, and is rotatably connected to the column 10 below it via the air guide shroud support frame 60 passing over the impeller 30.

[0057] The air guide shroud support frame 60 consists of several radially distributed side-standing connecting frames 63 around the rotating main shaft 20 and the column 10. A connecting reinforcing rib 61 is connected to the reinforcing rib 56 on the upper end of the closed plate 55 of the air guide shroud 50, and the lower side of the outer end of the connecting frame 63 is connected to the connecting reinforcing rib 61. Figure 3 As shown, a first bearing sleeve 65 of the air guide shroud is fitted at a distance from the main rotating shaft 20, directly above the cylindrical impeller sleeve 22. The lower end of the first bearing sleeve 65 of the air guide shroud partially covers the locking nut 23 mentioned above. First rotating bearings 66 of the air guide shroud (preferably ball bearings) are provided at both ends between the first bearing sleeve 65 of the air guide shroud and the main rotating shaft 20. The inner walls of both the upper and lower ends of the first bearing sleeve 65 of the air guide shroud are concave, forming concave steps that limit the positioning of the first rotating bearing 66 of the air guide shroud. The lower end of the air guide bearing 65 is located above the locking nut 23. A supporting flange protrudes from the outer wall of the lower end of the first bearing sleeve 65. The connecting plate 62, integrally formed at the inner end of the connecting frame 63, is connected to the outer wall of the first bearing sleeve 65 of the air guide shroud and supports the flange. This allows the air guide shroud 50 to be rotatably connected to the main rotating shaft 20 via a radially shaped air guide shroud support frame 60. The top of the rotating spindle is sealed with a sealing ring 68.

[0058] On the reinforcing rib 56 of the closed plate 55 at the lower end of the air guide shroud 50, a connecting reinforcing rib 61 is also connected. The lower side of the outer end of the connecting frame 63 is connected to the connecting reinforcing rib 61, while the inner end of the integral connecting plate 62 is connected to the outer wall of the second bearing sleeve 67 of the air guide shroud; Figure 4 As shown, the second bearing sleeve 67 of the air guide shroud is a cylindrical shape with open ends, sleeved around the column 10, located below the impeller support frame 40, as shown. Figure 2 and Figure 4 As shown, in order to install the second bearing 64 of the air guide shroud between the second bearing sleeve 67 and the column 10, an inverted T-shaped bearing mounting seat 14 is integrally protruding on the column 10. A limiting ring 19 is also fixedly fitted on the upper part of the bearing mounting seat 14. A limiting cylinder 651 is coaxially sleeved inside the bearing sleeve 65 of the air guide shroud. The second bearing 64 of the air guide shroud is installed between the second bearing sleeve 62 of the air guide shroud and the bearing mounting seat 14 of the column 10. It is supported on the step of the bearing mounting seat 14 below, and limited above by the limiting cylinder 651 and the limiting ring 19. In this way, the air guide shroud support frame 60 can rotate around the column 20, and the stationary column 10 will not restrict the air guide shroud 50 from rotating around the main shaft 20.

[0059] The top of the second bearing sleeve 67 of the air guide cover is higher than the connecting plate 62 and the limiting cylinder 651, and a sealing end cover 15 is installed on the outer gap of the top of the second bearing sleeve 67 of the air guide cover, and the sealing end cover 15 is locked to the top of the second bearing sleeve 67 of the air guide cover with screws; a sealing ring 16 is pressed between the bottom of the sealing end cover 15 and the protruding sealing step 18 on the column; a downward dust cover 17 is fitted on the sealing step 18 to cover the sealing end cover 15.

[0060] As a preferred embodiment, two horn openings 70 are symmetrically arranged back-to-back on the upper and lower end faces of the air guide shroud 50 to create a stronger pressurization effect on the air receiving surface of the air guide shroud.

Claims

1. A wind turbine rotor, characterized in that, The system includes a column (10), a rotating main shaft (20), an impeller (30), an impeller support frame (40), a wind guide shroud (50), and a wind guide shroud support frame (60). The rotating main shaft (20) is rotatably fitted inside the column (10) and partially extends out of the column. The impeller (30) has a wheel-shaped housing (34) with its upper and lower end faces closed and its inner surface closed, with only its outer surface open as an air inlet. The wheel-shaped housing (34) is centered on the rotating main shaft (20), and several wind blades (31) are provided inside the wheel-shaped housing (34). All the wind blades are evenly and radially distributed around the rotating main shaft (20). The wind impeller (30) is coaxially surrounded by the wind guide shroud (50). The wind guide shroud includes several wind guide vanes (51). All the wind guide vanes are radially and evenly distributed in a circular shape. The upper and lower ends are closed, the outer side is open to form a wind inlet, and the inner side is connected to the outer side of the wind impeller (30) to form a pressurized air duct that is wider on the outside and narrower on the inside. The outer end of the wind turbine support frame (40) is connected to the wheel-shaped housing (34) of the wind impeller (30), and the inner end is connected to the part of the rotating main shaft (20) located outside the column, which drives the rotating main shaft (20) to rotate and generate electricity. The wind guide shroud (50) is rotatably connected to the rotating main shaft (20) through the wind guide shroud support frame (60). The air guide shroud (50) has pressurized flared mouths (70) symmetrically arranged back-to-back on both ends of the two sides. The angle between each of the wind blades (31) and the diameter of the wind impeller (30) passing through it is 15-45°.

2. The wind turbine rotor of the wind turbine generator according to claim 1, characterized in that, Each wind blade (31) is an arc-shaped blade.

3. The wind turbine rotor of the wind turbine according to claim 2, characterized in that, Reinforcing baffles (32) are sealed at the upper and lower ends of each blade (31) along the arc and chord length.

4. The wind turbine rotor of the wind turbine generator according to claim 1, characterized in that, Each air guide plate (51) of the air guide cover (50) is positioned on the periphery of the wind blade (31) in a corresponding manner, with the inner side of the air guide plate close to the outer side of the wind blade.

5. The wind turbine rotor of the wind turbine generator according to claim 1, characterized in that, Each of the aforementioned air guide vanes (51) is rectangular.

6. The wind turbine rotor of the wind power generator according to claim 5, characterized in that, Each of the air guide vanes (51) consists of a rectangular air guide vane body (511), a rectangular frame (512) surrounding the air guide vane body, and an air guide vane central axis (513). The air guide vane central axis (513) is fixedly set on the vertical central axis of the air guide vane body (511), and the two ends of the air guide vane central axis are rotatably connected to the rectangular frame.

7. The wind turbine rotor of the wind power generator according to claim 1 or 5, characterized in that, The angle between the air guide vane and the diameter of the air guide shroud passing through it is 0-45 degrees.

8. The wind turbine rotor of the wind power generator according to claim 1, 5, or 6, characterized in that, Each of the air guide vanes (51) can rotate around its own central axis under the drive of the air guide vane rotation mechanism (59) to adjust the opening and closing size and angle of the air inlet.

9. The wind turbine rotor of the wind turbine generator according to claim 8, characterized in that, The central shaft (513) of each air guide vane (51) is fixedly sleeved in a rotating sprocket (594) at the vertical central axis. The air guide vane rotating mechanism (59) includes a motor (591), a pull rod (592), a rotating arm (593), the rotating sprocket (594), and a chain (595). The inner end of the pull rod (592) is connected to the output shaft of the motor, and the outer end is rotatably connected to one end of the rotating arm (593). The other end of the rotating arm (593) is connected to one of the central shafts (513) of the air guide vane, driving it to rotate. A chain (595) is engaged with all the rotating sprockets, driving all the rotating sprockets to rotate synchronously.

10. The wind turbine rotor of the wind turbine according to claim 9, characterized in that, The air guide vane rotation mechanism (59) further includes a plurality of tension sprockets (596); a pair of tension sprockets (596) are arranged on the outside of each of the rotating sprockets (594), and the tension sprockets are all engaged on the chain (595) and located on the opposite side of the rotating sprocket. The engagement sequence of the chain is tension sprocket - rotating sprocket - another tension sprocket; at least one of the pair of tension sprockets (596) arranged on each of the rotating sprockets (594) is equipped with a tension adjustment mechanism.

11. The wind turbine rotor of the wind power generator according to claim 10, characterized in that, Each of the tension adjustment mechanisms includes a fixed slide and a fixed nut (597). A slider (598) is slidably mounted on the slide. One side of the slider is connected to the shaft of the tension sprocket, and the other side is fixed with a screw (599). The nut (597) is threadedly connected to the screw (599) so that when the screw is turned, the screw drives the slider and the tension sprocket to move back and forth, thereby adjusting the tension of the chain (595).

12. The wind turbine rotor of the wind turbine according to claim 11, characterized in that, The outer edge of the air guide shroud (50) has two upper and lower annular outer edge skeletons (53), and the inner edge of the air guide shroud (50) has two upper and lower annular inner edge skeletons (54). The sealing plate (55) is encapsulated on the upper and lower end faces of the outer edge skeleton and the inner edge skeleton. A reinforcing rib (56) is connected between the outer edge skeleton and the inner edge skeleton on the same sealing plate. The two ends of the central shaft (513) of the air guide plate and the sprocket (594) are connected to the reinforcing rib (56). The motor (591) is mounted on the motor mounting plate (57), and the motor mounting plate is mounted on two adjacent reinforcing ribs (56). For each pair of tensioning sprockets (596) and tension adjustment mechanism of each rotating sprocket (594), the nut (597) and the slide and the other tensioning sprocket are fixed to the reinforcing rib (56) by the tensioning sprocket mounting plate (58).

13. The wind turbine rotor of the wind turbine according to claim 12, characterized in that, The air guide vane rotation mechanism is located on the lower side of the lower end sealing plate of the air guide shroud (50).

14. The wind turbine rotor of the wind turbine generator according to any one of claims 1-6, characterized in that, The connection method between the impeller support frame (40) and the rotating main shaft (20) is as follows: a connecting step (21) is protruding radially outward on the part of the rotating main shaft that extends out of the column. A cylindrical impeller sleeve (22) with an open lower end is fixedly sleeved on the connecting step (21). The impeller support frame (40) is radially fixedly connected to the outer wall of the impeller sleeve (22). The bottom center of the impeller sleeve (22) is provided with a through hole to accommodate the rotating main shaft (20) passing through.

15. The wind turbine rotor of the wind power generator according to any one of claims 1-6, characterized in that, The rotating spindle (20) and the column (10) are rotatably connected in the following manner: a flange edge (11) protrudes outward from the top of the column (10) and is connected to an inverted T-shaped bearing sleeve (12) sleeved outside the rotating spindle (20). The bearing sleeve (12) is lined with bearings (13) between its two ends and the rotating spindle (20).

16. The wind turbine rotor of the wind turbine according to claim 15, characterized in that, The inner surface of the bearing sleeve (12) near the column is recessed to form a cavity for accommodating the bearing (13). A locking ring (24) supporting the bearing is fixed below the bearing (13) at the top surface of the column and on the rotating main shaft. The inner surface of the upper end of the bearing sleeve (12) is recessed to form a stepped surface supporting the bearing (13), and a sealing plug (122) is provided at the opening of the upper end of the bearing sleeve (12).

17. The wind turbine rotor of the wind turbine according to claim 16, characterized in that, The impeller support frame structure (40) includes several side-standing right-angled trapezoidal connecting frames (41), which are radially distributed around the rotating main shaft. On each right-angled trapezoidal connecting frame, the shorter bottom (411) is connected to the part of the rotating main shaft that extends out of the column, and the longer bottom (412) is fixedly connected to the inner side of the wheel-shaped housing (34) of the impeller (30).

18. The wind turbine rotor of the wind turbine according to claim 1, characterized in that, The air guide shroud (50) is rotatably connected above the main shaft (20) via the upper air guide shroud support frame (60), and the air guide shroud (50) is rotatably connected below the column (10) via the lower air guide shroud support frame (60).

19. The wind turbine rotor of the wind power generator according to claim 18, characterized in that, The rotatable connection structure between the air guide shroud (50) and the rotating main shaft (20) is as follows: an air guide shroud bearing sleeve (65) is provided at intervals outside the rotating main shaft (20); the air guide shroud bearing (65) and the rotating main shaft (20) are provided at both ends of the air guide shroud bearing (65) and the rotating main shaft (20); the upper end of the air guide shroud (50) is provided with a sealing plate (55), the sealing plate is provided with a connecting reinforcing rib (61), the lower side of the outer end of the air guide shroud support frame (60) is connected to the connecting reinforcing rib (61), the inner end of the air guide shroud support frame (60) is integrally provided with a connecting plate (62), and the connecting plate (62) is connected to the outer wall of the air guide shroud bearing sleeve (65).

20. The wind turbine rotor of the wind turbine according to claim 19, characterized in that, The inner walls of the upper and lower ends of the air guide bearing sleeve (65) are concave to form concave steps that limit the air guide bearing (66); below is a locking nut (23); the outer wall of the lower end of the air guide bearing sleeve (65) protrudes to form a convex edge that supports the connecting plate (62).

21. The wind turbine rotor of the wind turbine according to claim 1 or 20, characterized in that, Located below the impeller support frame (40), a cylindrical wind guide shroud second bearing sleeve (67) with open ends is fitted around the column (10); below the wind guide shroud (50), the upper side of the outer end of the wind guide shroud support frame (60) is connected to the connecting reinforcing rib (61) below the lower end of the wind guide shroud (50), and the connecting plate (62) integrally connected to the inner end of the wind guide shroud support frame (60) is connected to the outer wall of the wind guide shroud second bearing sleeve (67); a wind guide shroud second bearing (64) is provided between the wind guide shroud second bearing sleeve (67) and the column (10) so that the wind guide shroud support frame (60) can rotate around the column (20).

22. The wind turbine rotor of the wind turbine generator according to claim 21, characterized in that, The column (10) has an integrally protruding bearing mounting seat (14) on which the second bearing (67) of the air guide is mounted. A limit ring (19) is also fixedly sleeved above the bearing mounting seat (14) to limit the second bearing (67) of the air guide. A limit sleeve (651) is coaxially fixedly sleeved on the inner side of the second bearing sleeve (65) of the air guide to limit the upper part of the second bearing sleeve (63) of the air guide.

23. The wind turbine rotor of the wind turbine generator according to claim 22, characterized in that, The top of the second bearing sleeve (65) of the air guide cover is higher than the connecting plate (62) and the limiting cylinder (651); a sealing end cap (15) is installed at the gap between the top of the second bearing sleeve (65) of the air guide cover and the column, and the sealing end cap (15) is locked to the top of the second bearing sleeve (67) of the air guide cover with screws; a sealing ring (16) is pressed between the bottom of the sealing end cap (15) and the protruding sealing step (18) on the column; a downward dust cover (17) is fitted on the sealing step (18) to cover the sealing end cap (15).

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