Combined wind power generation device capable of improving wind energy utilization rate

Abstract

The combined wind power generation device comprises a cabin, a generator set, a main shaft and a straight gear, the generator set is installed in an inner cavity of the cabin, the main shaft is transversely and rotatably installed on the right side wall of the cabin, the straight gear is installed at the left end of the main shaft, and the straight gear is in meshing transmission with the generator set; mechanical energy is conveyed to the generator set through the main shaft, the generator set converts the mechanical energy into electric energy, and a hub is installed at the right end of the main shaft through a flange. The wind resistance of the blades can be accurately changed according to the wind power, the rotating speed of the main shaft is kept constant, a generator set always works in a high-efficiency power interval, the wind energy utilization rate is remarkably improved, finally, the maximum generating capacity is achieved, the surfaces of the blades are prevented from icing, the blades are prevented from being influenced by ice layers or damaged due to falling of ice blocks, and the blade structure is effectively protected. Good aerodynamic characteristics of the blade are maintained, the wind energy conversion rate is prevented from being reduced due to freezing, and long-term stable operation of equipment is guaranteed.

Description

Technical Field

[0001] This invention relates to the field of wind power generation technology, specifically to a combined wind power generation device for improving wind energy utilization. Background Technology

[0002] Wind power generation is an important form of wind energy utilization. Its core principle is to convert the kinetic energy of the wind into mechanical kinetic energy and electrical kinetic energy in sequence: the wind turbine rotates under the action of the wind, converting the wind energy into the mechanical energy of the wind turbine shaft, and the generator rotates under the drive of the wind turbine shaft, thus completing the conversion of mechanical energy into electrical energy.

[0003] In wind power generation, wind speed is the fundamental factor determining the rotor speed. The higher the wind speed, the greater the thrust of the airflow on the blades, and theoretically, the higher the rotor speed. However, wind speed and power generation are not entirely proportional. Only when the main shaft speed reaches a specific value can the generator set output maximum power, and only then can power generation be maximized.

[0004] However, current wind power generation devices have two significant shortcomings. First, they cannot dynamically adjust the blade resistance according to changes in wind speed, making it difficult to maintain a constant main shaft speed, which in turn leads to a decrease in wind energy utilization and makes it difficult to achieve optimal power generation. Second, under severe weather conditions, the blades are prone to icing. If the ice layer is not removed in time, it will not only affect the normal rotation of the blades, but may also damage the blades due to the large size of the ice blocks falling off, affecting the safe and stable operation of the equipment. Summary of the Invention

[0005] The purpose of this invention is to provide a combined wind power generation device that improves wind energy utilization, thereby at least solving the problems of existing technologies that cannot improve wind energy utilization, have low power generation efficiency, and cannot remove ice.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a combined wind power generation device for improving wind energy utilization, comprising a nacelle, a generator set, a main shaft, and a spur gear. The generator set is installed inside the nacelle cavity. The main shaft is rotatably mounted laterally on the right side wall of the nacelle. The spur gear is installed at the left end of the main shaft and meshes with the generator set for transmission. The main shaft transmits mechanical energy to the generator set, which then converts the mechanical energy into electrical energy. A hub is mounted on the right end of the main shaft via a flange. Several anti-condensation mechanisms are equidistantly installed on the outer wall of the hub along the circumference. Blades are installed on the outer side of the anti-condensation mechanisms. The blades rotate using wind power, thereby converting wind force into mechanical energy for the main shaft. A speed-changing mechanism is installed on the inner wall of the hub. A rotating mechanism is installed on the right side of the hub cavity. The rotating mechanism is linked with the speed-changing mechanism to cause blade vibration, removing ice from the blade surface. A rotatable external gear ring is installed inside the hub cavity. The speed-changing mechanism drives the external gear ring to rotate. Several teeth are circumferentially installed on the outer edge of the left side wall of the external gear ring.

[0007] Preferably, the anti-condensation mechanism includes a rotatable bushing installed on the outer wall of the hub, a rotatable first rotating shaft installed in the inner cavity of the bushing, a reversing gear connected to the teeth and teeth installed on the inner side of the outer wall of the bushing, the outer gear ring is driven to rotate by the speed change mechanism, and the bushing rotates under the transmission conditions of the teeth and the reversing gear to adjust the wind resistance of the blades. An eccentric block is installed on the outer side of the outer wall of the first rotating shaft, and a protective cover is installed on the outer side of the outer wall of the bushing to protect the eccentric block, and the protective cover is installed with the blades. The rotation of the eccentric block causes the blade to vibrate, preventing ice formation on the blade surface and protecting the blade's rotation efficiency.

[0008] Preferably, the transmission mechanism includes a housing installed on the inner wall of the wheel hub. A moving component and a driving component are respectively installed at the upper and lower ends of the inner cavity of the housing. The driving component drives the moving component to move linearly, so that the moving component pulls the outer gear ring to rotate. By changing the blade angle and thus adjusting the blade resistance, the blade rotation speed can be kept constant regardless of the wind speed, which in turn keeps the main shaft rotation speed constant, maximizing the power of the generator set.

[0009] Preferably, the drive assembly includes a first motor installed at the bottom of the inner cavity of the box, a rotating drum installed at the output end of the first motor, and a guide groove provided on the outer wall of the rotating drum.

[0010] Preferably, the guide groove includes several alternating straight grooves and inclined grooves, the straight grooves being parallel to the circumferential direction of the outer wall of the rotating cylinder, while the inclined grooves are distributed obliquely on the outer wall of the rotating cylinder.

[0011] Preferably, the movable component includes a limiting rod installed at the bottom of the inner cavity of the box, a movable rack sleeved on the outer wall of the limiting rod, and the rack meshing with an outer toothed ring, and a guide post installed at the bottom of the rack that is inserted into the inner cavity of the guide groove.

[0012] Preferably, the rotating mechanism includes a support seat installed on the right side of the inner cavity of the hub. A second motor is installed at the right end of the support seat, and a drive gear is installed at the output end of the second motor. A plurality of rotatable second shafts are installed equidistantly along the left side wall of the support seat. A driven gear that meshes with the drive gear is installed at the right end of the second shaft. The drive gear is driven to rotate by the second motor. Under the transmission condition of the drive gear and the driven gear, the second shafts can rotate synchronously. A universal joint is installed at the left end of the second shaft through a pin, and the other end of the universal joint is connected to the inner side of the first shaft through a pin. It is used to drive the first shaft to rotate, so that the eccentric block can rotate eccentrically and provide vibration power for the blades.

[0013] Preferably, the maximum tilt angle of the universal joint is less than 30 degrees.

[0014] The present invention proposes a combined wind power generation device to improve wind energy utilization, which has the following advantages: 1. The first motor drives the rotating drum to rotate. The inclined groove on the outer wall of the rotating drum can push the guide column to move linearly, while the straight groove plays a positioning role for the guide column. This drives the rack to move along a certain linear distance. Through the meshing transmission between the rack and the outer gear ring, the outer gear ring can be driven to rotate. Then, through the engagement of the teeth of the outer gear ring with the reversing gear in the anti-condensation mechanism, the bushing and blades are driven to rotate, realizing the dynamic adjustment of the blade angle. It can accurately change the blade wind resistance according to the wind force, ensuring that the main shaft speed remains constant, so that the generator set always works in the high-efficiency power range, significantly improving the wind energy utilization rate, and ultimately maximizing the power generation.

[0015] 2. The second motor drives the active gear to rotate. The active gear meshes with the driven gear, which drives the second rotating shaft and the universal joint to rotate synchronously. The universal joint then drives the first rotating shaft to rotate, causing the eccentric block on the first rotating shaft to rotate eccentrically. The centrifugal force generated by the rotation of the eccentric block is transmitted to the blade through the protective cover, causing the blade to vibrate. This prevents ice from forming on the blade surface, avoids ice affecting the blade rotation or damaging the blade due to falling ice, effectively protects the blade structure, maintains good aerodynamic characteristics of the blade, prevents the wind energy conversion rate from decreasing due to icing, and ensures long-term stable operation of the equipment. Attached Figure Description

[0016] Figure 1 This is a perspective view of the present invention; Figure 2 This is a left-side cross-sectional view of the wheel hub; Figure 3 for Figure 2 Enlarged view of point A in the middle; Figure 4 Exploded view of the transmission mechanism; Figure 5 This is a schematic diagram of the rotating drum structure; Figure 6 This is a left-side cross-sectional view of the transmission mechanism; Figure 7 This is a schematic diagram of the rotating mechanism.

[0017] In the diagram: 1. Engine compartment; 2. Generator set; 3. Main shaft; 4. Spur gear; 5. Hub; 6. Anti-condensation mechanism; 7. Blade; 8. Transmission mechanism; 9. Rotating mechanism; 10. External gear ring; 11. Gear; 61. Bushing; 62. First rotating shaft; 63. Reversing gear; 64. Eccentric block; 65. Protective cover; 81. Box body; 82. Drive assembly; 83. Moving assembly; 821. First motor; 822. Rotary drum; 823. Guide groove; 831. Limit rod; 832. Rack; 833. Guide column; 8231. Straight groove; 8232. Inclined groove; 91. Support seat; 92. Second motor; 93. Drive gear; 94. Second rotating shaft; 95. Driven gear; 96. Universal joint. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Please see Figure 1-7 This invention provides a technical solution: a combined wind power generation device for improving wind energy utilization, comprising a nacelle 1, a generator set 2, a main shaft 3, and a spur gear 4. The generator set 2 is installed inside the nacelle 1. The main shaft 3 is rotatably mounted laterally on the right side wall of the nacelle 1. The spur gear 4 is installed on the left end of the main shaft 3 and meshes with the generator set 2 for transmission. Mechanical energy is transmitted to the generator set 2 through the main shaft 3, allowing the generator set 2 to convert mechanical energy into electrical energy. A hub 5 is mounted on the right end of the main shaft 3 via a flange. Equivalently spaced spur gears are mounted on the outer wall of the hub 5 along its circumference. Several anti-condensation mechanisms 6 are provided. Blades 7 are installed on the outer side of each anti-condensation mechanism 6. The blades 7 rotate using wind power, thereby converting wind power into mechanical energy of the main shaft 3. A speed-changing mechanism 8 is installed on the inner wall of the hub 5. A rotating mechanism 9 is installed on the right side of the inner cavity of the hub 5. The rotating mechanism 9 is linked with the speed-changing mechanism 8, which can cause the blades 7 to vibrate and remove ice from the surface of the blades 7. A rotatable external toothed ring 10 is installed in the inner cavity of the hub 5. The external toothed ring 10 is driven to rotate by the speed-changing mechanism 8. Several teeth 11 are installed circumferentially on the outer edge of the left side wall of the external toothed ring 10.

[0020] As a preferred embodiment, the anti-condensation mechanism 6 further includes a rotatable bushing 61 mounted on the outer wall of the hub 5. A rotatable first rotating shaft 62 is installed inside the bushing 61. A reversing gear 63, which meshes with the teeth 11, is installed on the inner side of the outer wall of the bushing 61. The external gear ring 10 is driven to rotate by the speed change mechanism 8. Under the transmission conditions of the teeth 11 and the reversing gear 63, the bushing 61 rotates to adjust the wind resistance of the blade 7. The rotation speed of the blade 7 is adjusted according to the wind speed. An eccentric block 64 is installed on the outer side of the outer wall of the first rotating shaft 62. When the eccentric block 64 rotates, it generates centrifugal force. Since the mass distribution of the eccentric block 64 is uniform, it will cause the protective cover 65 to vibrate. A protective cover 65 is installed on the outer side of the outer wall of the bushing 61 to protect the eccentric block 64. The protective cover 65 is installed on the blade 7.

[0021] More specifically, the wind resistance of blade 7 changes with the angle adjustment: when the wind speed is low, the angle of blade 7 is adjusted to increase the effective wind-receiving area to enhance the rotational power of blade 7; when the wind speed is high, the angle of blade 7 is adjusted to reduce the effective wind-receiving area to limit the rotational speed of blade 7, ultimately achieving a constant rotational speed of main shaft 3 and ensuring stable power output of generator set 2.

[0022] As a preferred embodiment, the transmission mechanism 8 further includes a housing 81 installed on the inner wall of the hub 5. The upper and lower ends of the inner cavity of the housing 81 are respectively equipped with a moving component 83 and a driving component 82. The driving component 82 drives the moving component 83 to move linearly, so that the moving component 83 pulls the outer gear ring 10 to rotate.

[0023] As a preferred embodiment, the drive assembly 82 further includes a first motor 821 installed at the bottom of the inner cavity of the housing 81. A rotating drum 822 is installed at the output end of the first motor 821. A guide groove 823 is provided on the outer wall of the rotating drum 822. The guide groove 823 includes a plurality of alternating straight grooves 8231 and inclined grooves 8232. The straight grooves 8231 are parallel to the circumferential direction of the outer wall of the rotating drum 822, while the inclined grooves 8232 are inclinedly distributed on the outer wall of the rotating drum 822. When the inclined grooves 8232 rotate, they can squeeze the guide post 833, causing the rack 832 to move linearly. When the guide post 833 enters the straight groove 8231, it restricts the linear movement of the guide post 833, allowing the rack 832 to remain stationary.

[0024] As a preferred embodiment, the movable component 83 further includes a limiting rod 831 installed at the bottom of the inner cavity of the housing 81. The limiting rod 831 is rectangular in shape, allowing the rack 832 to stably mesh with the outer toothed ring 10. The outer wall of the limiting rod 831 is sleeved with a movable rack 832, and the rack 832 is meshed with the outer toothed ring 10. The bottom of the rack 832 is equipped with a guide post 833 that is inserted into the inner cavity of the guide groove 823.

[0025] More specifically, when the blade angle needs to be adjusted, the first motor 821 starts and drives the rotating drum 822 to rotate. At this time, the guide post 833 moves relative to the rotating drum 822 within the guide groove 823. When the guide post 833 enters the inclined groove 8232 area, the inclined structure of the inclined groove 8232 will generate a thrust on the guide post 833 along the axial direction of the limiting rod 831, pushing the rack 832 to move linearly along the limiting rod 831; when the guide post 833 enters the straight groove 8231 area, since the straight groove 8231 is parallel to the circumference of the rotating drum 822, the guide post 833 only moves in a circular motion with the rotating drum 822 and no longer generates axial displacement, so the rack 832 remains stationary; through the alternating linear movement and stationary action of the rack 832, the outer gear ring 10 can be precisely pulled to rotate at the corresponding angle, and then through the transmission cooperation between the outer gear ring 10 and the anti-condensation mechanism 6, the angle of the blade 7 can be dynamically adjusted, thereby changing the wind resistance of the blade 7 and stabilizing the speed of the main shaft 3.

[0026] As a preferred embodiment, the rotating mechanism 9 further includes a support base 91 mounted on the right side of the inner cavity of the hub 5. A second motor 92 is mounted on the right end of the support base 91, and a drive gear 93 is mounted on the output end of the second motor 92. A plurality of rotatable second rotating shafts 94 are equidistantly mounted circumferentially on the left side wall of the support base 91. A driven gear 95, meshing with the drive gear 93, is mounted on the right end of each second rotating shaft 94. The second motor 92 drives the drive gear 93 to rotate. Under the transmission condition between the drive gear 93 and the driven gear 95, the first... Two rotating shafts 94 rotate synchronously. One end of a universal joint 96 is mounted on the left end of the second rotating shaft 94 via a pin. The other end of the universal joint 96 is connected to the inner side of the first rotating shaft 62 via a pin. The maximum tilt angle of the universal joint 96 is less than 30 degrees, which improves transmission performance and reliability, extends the service life of the universal joint 96, and the universal joint 96 can also have a certain effect in offsetting vibration. The rotating mechanism 9 can stably drive multiple first rotating shafts 62 to rotate synchronously, ensuring that all blades 7 can vibrate to remove ice. At the same time, the design of the universal joint 96 ensures the high efficiency of power transmission and the durability of components.

[0027] More specifically, when it is necessary to remove ice from the surface of blade 7, the second motor 92 starts and drives the drive gear 93 to rotate. The drive gear 93, through meshing with each driven gear 95, drives all the second rotating shafts 94 to rotate synchronously. The rotational motion of the second rotating shafts 94 is transmitted to the first rotating shaft 62 through the universal joint 96, so that the first rotating shaft 62 rotates synchronously with the second rotating shaft 94. When the first rotating shaft 62 rotates, the eccentric block 64 installed on its outer wall performs eccentric rotational motion, and the centrifugal force generated is transmitted to the blade 7 through the protective cover 65, causing the blade 7 to vibrate, thereby shaking off the ice on the surface and realizing the de-icing function. Through the above structural design, the rotating mechanism 9 can stably drive multiple first rotating shafts 62 to rotate synchronously, ensuring that all blades 7 can obtain uniform vibration power and ensuring the consistency of the de-icing effect. At the same time, the optimized design of the universal joint 96 takes into account both power transmission efficiency and component durability, providing a guarantee for the long-term stable operation of the equipment.

[0028] Its detailed connection method is a well-known technology in this field. The following mainly introduces the working principle and process, and the specific work is as follows.

[0029] Step 1: Wind has kinetic energy. When the wind blows towards the blade 7, the blade 7 will cause the main shaft 3 to rotate, and the spur gear 4 will cause the generator set 2 to rotate. The generator set 2 will convert mechanical energy into electrical energy. Step two: To control the rotational speed of the main shaft 3 within the ideal range and maximize power generation, the wind resistance of the blades 7 is adjusted. The first motor 821 drives the rotating drum 822 to rotate clockwise or counterclockwise. The inclined groove 8232 can press the guide post 833 to the right or left, allowing the rack 832 to move linearly on the limit rod 831. When the guide post 833 enters the straight groove 8231, it has a braking effect on the rack 832. Therefore, the outer gear ring 10 rotates clockwise or counterclockwise. Under the transmission conditions of the teeth 11 and the reversing gear 63, the blades 7 rotate. The wind resistance of the blades 7 is adjusted, and the inclination of the blades 7 is adjusted according to the wind force to keep the rotational speed of the main shaft 3 constant, maximize the wind energy utilization rate, and increase power generation. Step 3: When it is necessary to remove the ice condensation on the blade 7, the second motor 92 drives the drive gear 93 to rotate. Under the transmission condition of the drive gear 93 and the driven gear 95, the universal joint 96 rotates. The first rotating shaft 62 drives the eccentric block 64 to rotate. Utilizing the uneven mass distribution of the eccentric block 64, the rotating eccentric block 64 will generate centrifugal force, causing the protective cover 65 to vibrate, thereby making the blade 7 vibrate, shaking off the ice condensation on the surface of the blade 7, and preventing the rotation of the blade 7 from being affected.

[0030] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A combined wind power generation device for improving wind energy utilization, comprising a nacelle (1), a generator set (2), a main shaft (3) and a spur gear (4), the generator set (2) is installed in the inner cavity of the nacelle (1), the main shaft (3) is transversely rotatably installed on the right side wall of the nacelle (1), the spur gear (4) is installed on the left end of the main shaft (3), the spur gear (4) is in meshing transmission with the generator set (2), mechanical energy is transmitted to the generator set (2) through the main shaft (3), and the generator set (2) converts the mechanical energy into electrical energy, characterized in that, The main shaft (3) right end is provided with a hub (5) through a flange, the outer wall of the hub (5) is provided with a plurality of anti-condensation mechanisms (6) equidistantly along the circumference, the outer side of the anti-condensation mechanism (6) is provided with a blade (7), the blade (7) rotates with the wind as the power, and then converts the wind power into the mechanical energy of the main shaft (3), the inner wall of the hub (5) is provided with a speed change mechanism (8), the right side of the inner cavity of the hub (5) is provided with a rotating mechanism (9), the rotating mechanism (9) is linked with the speed change mechanism (8), can cause the blade (7) to vibrate, remove the ice on the surface of the blade (7), the inner cavity of the hub (5) is provided with a rotatable external gear ring (10), the external gear ring (10) is driven to rotate through the speed change mechanism (8), the left side wall of the external gear ring (10) is provided with a plurality of teeth (11) along the circumference.

2. The combined wind power generation device for improving the wind energy utilization according to claim 1, characterized in that, The anti-condensation mechanism (6) comprises a shaft sleeve (61) rotatable mounted on the outer wall of the hub (5), a first rotating shaft (62) rotatable mounted in the inner cavity of the shaft sleeve (61), a direction-changing gear (63) mounted on the inner side of the outer wall of the shaft sleeve (61) and meshed with the teeth (11), the shaft sleeve (61) is driven to rotate through the speed change mechanism (8), and the shaft sleeve (61) is rotated under the transmission condition of the teeth (11) and the direction-changing gear (63), so that the wind resistance of the blade (7) is adjusted, an eccentric block (64) is mounted on the outer side of the outer wall of the first rotating shaft (62), a protective cover (65) is mounted on the outer side of the outer wall of the shaft sleeve (61) and protects the eccentric block (64), and the protective cover (65) is mounted with the blade (7).

3. The combined wind power generation device of claim 2, wherein The speed change mechanism (8) comprises a box body (81) mounted on the inner wall of the hub (5), a moving assembly (83) and a driving assembly (82) respectively mounted on the upper end and the lower end in the inner cavity of the box body (81), the moving assembly (83) is driven to move linearly through the driving assembly (82), and the moving assembly (83) drives the external gear ring (10) to rotate.

4. The combined wind power generation device of claim 3, wherein The driving assembly (82) comprises a first motor (821) mounted in the inner cavity of the box body (81), a rotating drum (822) mounted on the output end of the first motor (821), and a guide groove (823) formed in the outer wall of the rotating drum (822).

5. The combined wind power generation device for improving the wind energy utilization according to claim 4, wherein The guide groove (823) comprises a plurality of straight grooves (8231) and inclined grooves (8232) alternately connected, the straight grooves (8231) are parallel to the circumferential direction of the outer wall of the rotating drum (822), and the inclined grooves (8232) are inclinedly distributed on the outer wall of the rotating drum (822).

6. The combined wind power generation device for improving the wind energy utilization according to claim 5, wherein The moving assembly (83) comprises a limiting rod (831) mounted in the inner cavity of the box body (81), a rack (832) movably sleeved on the outer wall of the limiting rod (831) and meshed with the external gear ring (10), and a guide column (833) mounted on the bottom of the rack (832) and inserted into the inner cavity of the guide groove (823).

7. The combined wind power generation device of claim 6, wherein The rotating mechanism (9) comprises a supporting seat (91) installed in the right side of the inner cavity of the wheel hub (5), a second motor (92) is installed at the right end of the supporting seat (91), a driving gear (93) is installed at the output end of the second motor (92), a plurality of rotatable second rotating shafts (94) are installed on the left side wall of the supporting seat (91) at equal intervals in the circumferential direction, a driven gear (95) meshed and connected with the driving gear (93) is installed at the right end of the second rotating shaft (94), the driving gear (93) is driven to rotate by the second motor (92), and the second rotating shaft (94) can be synchronously rotated under the transmission condition of the driving gear (93) and the driven gear (95); one end of a universal shaft (96) is installed at the left end of the second rotating shaft (94) through a pin shaft, and the other end of the universal shaft (96) is connected with the inner side of the first rotating shaft (62) through a pin shaft.

8. The combined wind power generation device for improving the wind energy utilization according to claim 7, characterized in that, The maximum inclination angle of the universal shaft (96) is less than 30 degrees.

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