Combined wind power generation device for improving wind energy utilization rate

Abstract

The present invention discloses a combined wind power generation device for improving the utilization rate of wind energy, which belongs to the technical field of wind power generation, and comprises a tower and a nacelle rotatably installed on the top surface of the tower, and also comprises a hub, impeller blades, a main shaft, a gear box, a doubly-fed wind turbine generator set, an abutment wheel, a tightening adjustment mechanism, a vertical sleeve, a sliding sleeve, a rotating blade, an air duct opening and closing mechanism and a transmission switching mechanism; the present invention can convert the wind energy in nature into the mechanical energy of the main shaft by transmission through the setting of the rotating blades through the adjustment processing of the tightening adjustment mechanism and the mutual cooperation of the air duct opening and closing mechanism and the transmission switching mechanism, so that the impeller blades and the rotating blades can integrately capture the wind energy in nature, thereby better converting it into the mechanical energy of the main shaft, thereby greatly improving the utilization rate of the wind energy in nature.

Description

Technical Field

[0001] The invention belongs to the technical field of wind power generation, and in particular relates to a combined wind power generation device for improving wind energy utilization. Background Art

[0002] Wind power generation refers to the process of converting the kinetic energy of wind into electrical energy. It is a clean and renewable way of utilizing energy. A wind turbine generator set includes a wind rotor, a transmission system, a generator, a tower, a control system, a yaw system, a cooling system and a braking system. The wind turbine captures wind energy through the wind rotor and converts it into mechanical energy, and then converts the mechanical energy into electrical energy through the transmission system and the generator, thus realizing the utilization of renewable wind energy resources.

[0003] In the prior art, the wind rotor is rotated by the wind to drive the generator to generate electricity. The intermittent nature of natural wind and the variability of wind direction lead to unstable wind speed, which affects the power generation. The yaw system is used to make the wind rotor always align with the wind direction to improve the efficiency of capturing wind energy. In addition, the wind rotor blades in the wind turbine can also achieve precise adjustment of the blade angle through the variable pitch system, thereby improving the efficiency of capturing wind energy. Therefore, the wind turbine can capture better wind energy under low wind speed conditions, that is, the wind turbine can work normally; and when the wind rotor captures too much wind energy and causes the wind rotor speed to be too fast, the main shaft in the transmission system will also rotate at high speed, and there is a possibility of shaking of the main shaft, which can easily reduce the stability of the main shaft rotating when the wind rotor captures wind energy.

[0004] Therefore, there is a need for a combined wind power generation device that improves wind energy utilization efficiency, so as to solve the problems in the prior art of how to improve wind energy utilization efficiency at rated speed of the main shaft during wind power generation and the insufficient stability performance of the main shaft when rotating at high speed as the wind wheel captures wind energy due to excessive wind force. Summary of the invention

[0005] The object of the present invention is to provide a combined wind power generation device for improving wind energy utilization efficiency, so as to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above object, the present invention provides the following technical solution: a combined wind power generation device for improving wind energy utilization efficiency, comprising a tower and a nacelle rotatably mounted on the top surface of the tower, and further comprising:

[0007] A wheel hub is rotatably mounted on a side wall of the nacelle, and three impeller blades are mounted on the wheel hub at equal angles. A main shaft fixed to the center of the wheel hub is mounted inside the nacelle, and a gear box connected to the main shaft is arranged inside the nacelle. The side of the gear box away from the main shaft is connected to a doubly-fed wind turbine generator set through a coupling;

[0008] An installation frame, wherein two installation frames are provided and are symmetrically distributed along the axis of the main shaft, a plurality of abutment wheels capable of contacting the main shaft are provided in the installation frame, and an abutment adjustment mechanism is provided between the two installation frames;

[0009] A vertical sleeve, the vertical sleeve is fixed to the top surface of the cabin, a mounting frame is fixed to the inner wall of the vertical sleeve, a sliding sleeve slides through the center of the top surface of the mounting frame, a rotating blade is tightly sleeved on the top outer surface of the sliding sleeve, a duct opening and closing mechanism that cooperates with the rotating blade is arranged on the top of the vertical sleeve, and a transmission switching mechanism that cooperates with the tightening adjustment mechanism is arranged between the sliding sleeve and the main shaft.

[0010] It should be noted that the tightening adjustment mechanism includes:

[0011] A fixing seat, two fixing seats are provided and both are fixed to the bottom inner wall of the cabin, a rotating gear is rotatably connected between the two fixing seats, a stepping motor coaxially fixed with the rotating gear is provided on the bottom inner wall of the cabin, a U-shaped rack rod is meshingly connected below the rotating gear, and the top end of the U-shaped rack rod slides through the outer surface of the cabin and is fixed to the outer surface of one of the mounting frames;

[0012] A push rod is arranged opposite to the U-shaped rack rod and slides through the outer surface of the cabin. The bottom end of the push rod is fixed to the outer surface of another mounting frame. An L-shaped rack rod is meshed and connected above the rotating gear. The L-shaped rack rod is fixed to the bottom end of the push rod.

[0013] It is further worth noting that the air duct opening and closing mechanism includes:

[0014] The blocking blocks are provided in two groups and each group of blocking blocks is installed on the outer surface of the vertical sleeve at an equal angle. The top of the vertical sleeve is provided with an opening and closing gear coaxially fixed with multiple blocking blocks one by one. The multiple opening and closing gears on the same side are meshed and connected with an arc-shaped rack rod. The bottom outer surfaces of the two arc-shaped rack rods are provided with a limiting ring fixed to the top surface of the vertical sleeve.

[0015] A sealing cover is fixed to the top of the vertical sleeve, a guide ring is fixed to the top surface of the sealing cover and the outer surface of the vertical sleeve, the outer surface of the end of the guide ring is connected to the air inlet pipe, an air outlet channel is provided on the outer surface of the end of the guide ring away from the air inlet pipe, and an opening and closing piece for synchronous rotation of two arc-shaped rack rods is provided at the air outlet channel.

[0016] As a preferred embodiment, the opening and closing member includes:

[0017] A connecting block, the connecting block is matched with the air outlet channel and fixed to the top of the push rod, and a push rack rod is fixed on the outer surface of the connecting block;

[0018] The pushing gear is provided with two and is respectively connected and meshed with the outer teeth on both sides of the pushing rack rod. The pushing gear and the opening and closing gear located at the end of the arc-shaped rack rod are coaxially fixed.

[0019] As a preferred implementation, the outer surface of the end portion of the blocking block extending out of the vertical sleeve is arranged in an arc shape, and the vertical cross-section of the guide ring is arranged in a two-section isosceles trapezoidal shape.

[0020] It should be further explained that the transmission switching mechanism includes:

[0021] A transmission sleeve, the transmission sleeve is rotatably mounted on the top inner wall of the cabin, the bottom outer surface of the sliding sleeve extends to the top inner wall of the transmission sleeve, a pressing piece matched with the sliding sleeve is arranged between the plurality of blocking blocks, the transmission sleeve and the outer surface of the main shaft are both tightly sleeved with bevel gears, and the two bevel gears are meshedly connected;

[0022] A fixing rod is fixed at the center of the inner wall of the transmission sleeve, the interior of the sliding sleeve is provided with a docking block which is tightly sleeved on the outer surface of the top of the fixing rod, the bottom inner wall of the sliding sleeve is provided with a slot adapted to the docking block, a rotating block is rotatably embedded on the outer surface of the bottom of the sliding sleeve, and the outer surface of the fixing rod is provided with a compression spring which is fixed to the opposite surfaces of the rotating block and the transmission sleeve.

[0023] As a preferred embodiment, the pressing member includes:

[0024] A pressing plate, the pressing plate is located above the rotating blade and fixed to the top of the sliding sleeve, and an extrusion block is fitted on the top outer surface of the pressing plate;

[0025] The top surface and the bottom surface of the connecting plate are respectively fixed to the opposite surfaces of the pushing rack rod and the extrusion block.

[0026] As a preferred implementation manner, the contact surface between the pressing plate and the extrusion block is a matching arc surface, and the projected circle diameter of the pressing plate is equal to the diameter of the vertical sleeve.

[0027] Compared with the prior art, the combined wind power generation device provided by the present invention for improving wind energy utilization efficiency has at least the following beneficial effects:

[0028] (1) When the impeller blades capture the natural wind energy, they drive the main shaft to rotate inside the nacelle. Through the adjustment of the tight adjustment mechanism and the mutual cooperation of the air duct opening and closing mechanism and the transmission switching mechanism, the natural wind energy can be converted into the mechanical energy of the main shaft through the setting of the rotating blades. The impeller blades and the rotating blades can capture the natural wind energy in an integrated manner, thereby better converting it into the mechanical energy of the main shaft, providing further guarantee for the subsequent conversion of mechanical energy into electrical energy through the gearbox and the doubly fed wind turbine generator set, greatly improving the utilization rate of natural wind energy.

[0029] (2) By adjusting the abutment adjustment mechanism, the air duct opening and closing mechanism and the transmission switching mechanism are driven to operate synchronously, so that the main shaft can abut against multiple abutment wheels and the transmission sleeve can idle, effectively improving the overspeed protection performance of the main shaft under the condition of excessive wind speed. At the same time, the rotating blades can achieve double sealing protection through the blocking block and the pressing plate, and the transmission coordination with the main shaft is released, forming multiple protections for the rotating blades, effectively ensuring the stability of the main shaft when running at high speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0031] Figure 2 It is a schematic diagram of the partial structure of the interior of the cabin of the present invention;

[0032] Figure 3 It is a schematic diagram of the local structure of the main shaft, vertical casing and blocking block of the present invention;

[0033] Figure 4 It is a schematic diagram of the internal partial structure of the guide ring of the present invention;

[0034] Figure 5 For the present invention Figure 4 A schematic diagram of the enlarged structure of the middle A area;

[0035] Figure 6 It is a partial structural schematic diagram of the tightening adjustment mechanism of the present invention;

[0036] Figure 7 For the present invention Figure 6 Schematic diagram of the enlarged structure of the middle B area;

[0037] Figure 8 It is a schematic diagram of the local structure of the installation frame and the abutment wheel of the present invention;

[0038] Fig. 9 For the present invention Figure 8 Schematic diagram of the enlarged structure of the middle C area;

[0039] Fig.10 It is a schematic diagram of the partial split structure of the air duct opening and closing mechanism of the present invention;

[0040] Fig.11 It is a schematic diagram of the horizontal wind flow direction when the blocking block in the present invention blocks the vertical casing;

[0041] Fig.12 This is a schematic diagram of the vertical casing sealing block of the present invention in an open state;

[0042] Fig.13 A schematic diagram of the position structure of the rotating blade when the docking block and the slot are docked in the present invention;

[0043] Fig.14 It is a schematic diagram of the direction of the rotating blades and the horizontal wind flow when the blocking block in the present invention opens the vertical casing;

[0044] Fig.15 Schematic diagram of horizontal wind flow direction above the pressing plate when the blocking block in the present invention opens the vertical sleeve.

[0045] In the figure: 1, tower; 2, cabin; 3, hub; 4, impeller blades; 5, main shaft; 6, gear box; 7, double-fed wind turbine generator set; 8, mounting frame; 9, abutment wheel; 10, abutment adjustment mechanism; 101, fixing seat; 102, rotating gear; 103, stepping motor; 104, U-shaped rack rod; 105, push rod; 106, L-shaped rack rod; 11, vertical sleeve; 12, mounting frame; 13, sliding sleeve; 14, rotating blades; 15, air duct opening and closing mechanism; 151, blocking block; 152, opening and closing gear; 153, arc shaped rack rod; 154, limit ring; 155, sealing cover; 156, guide ring; 157, air inlet pipe; 158, air outlet channel; 159, opening and closing member; 1591, connecting block; 1592, pushing rack rod; 1593, pushing gear; 16, transmission switching mechanism; 161, transmission sleeve; 162, pressing member; 1621, pressing plate; 1622, extrusion block; 1623, connecting plate; 163, bevel gear; 164, fixing rod; 165, docking block; 166, slot; 167, rotating block; 168, compression spring. DETAILED DESCRIPTION

[0046] The present invention will be further described below in conjunction with the embodiments.

[0047] In order to make the purpose, technical solution and advantages of the embodiments of the present disclosure clearer, the technical solution of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, rather than all the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present disclosure.

[0048] Unless otherwise defined, the technical or scientific terms used in the present disclosure shall have the usual meanings understood by persons with ordinary skills in the field to which the present disclosure belongs. The words "including" or "comprising" and the like used in the present disclosure mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. The words "connect" or "connected" and the like are not limited to physical or mechanical connections, but may also include electrical connections, whether direct or indirect. "Up", "down", "left", "right", etc. are only used to indicate relative position relationships. When the absolute position of the object being described changes, the relative position relationship may also change accordingly.

[0049] See also Figure 1-15 The present invention provides a combined wind power generation device for improving the utilization rate of wind energy, comprising a tower 1 and a nacelle 2 rotatably mounted on the top surface of the tower 1, and also comprising a hub 3, the hub 3 being rotatably mounted on one side wall of the nacelle 2, and having three impeller blades 4 distributed at equal angles mounted on the hub 3, a main shaft 5 fixed to the center of the hub 3 being mounted inside the nacelle 2, a gear box 6 connected to the main shaft 5 being arranged inside the nacelle 2, and a double-fed wind power generator set 7 being connected to the side of the gear box 6 away from the main shaft 5 through a coupling;

[0050] It should be noted that the impeller blades 4 capture the natural wind energy, so that the hub 3 and the main shaft 5 rotate synchronously, and the gearbox 6 converts the low-speed, high-torque mechanical energy transmitted by the main shaft 5 into high-speed, low-torque mechanical energy, and then converts the mechanical energy into electrical energy through the coupling through the double-fed wind turbine generator set 7, thereby achieving the purpose of wind power generation;

[0051] It should be noted that a variable pitch system for adjusting the angle of the impeller blades 4 is also provided in the hub 3, which is used to adjust the angle of the impeller blades 4, so as to ensure that the impeller blades 4 are in the best wind energy capture capacity under different wind speed conditions. In addition, a yaw system for adjusting the overall angle of the nacelle 2 and the impeller blades 4 is also provided in the nacelle 2, so that the impeller blades 4 are always aligned with the wind direction. The gearbox 6 is located on one side of the main shaft 5 and is also provided with a braking system for stopping the impeller blades 4 from rotating in the event of a failure or emergency of the wind turbine to ensure the safety of the wind turbine. Since the device involved in this case is in the pilot stage, its variable pitch system and yaw system are not shown in the figure. In addition, its doubly-fed wind turbine generator set 7 is usually composed of a generator body and a cooling system. The core components of the generator body are the rotor, stator and bearings. The cooling system mainly has three structural types: water cooling, air cooling and air-water cooling. The double-fed wind turbine generally adopts an AC excitation asynchronous generator, and the YSF160L-6 double-fed wind turbine is preferred. The rotor has a relatively independent AC excitation winding. There are three adjustable quantities, namely the excitation current amplitude, the excitation current phase and the excitation current frequency. Therefore, flexible excitation control can be performed to meet the generator operation performance requirements. The double-fed wind turbine generator set is also provided with an incremental encoder for measuring the real-time speed of the double-fed wind turbine. The impeller blades 4 and the hub 3 can be replaced by variable frequency asynchronous motors to simulate wind turbines. The wind turbine is controlled by an ABB inverter to simulate changes in wind speed.

[0052] The mounting frame 8 is provided with two mounting frames 8 and is symmetrically distributed along the axis of the main shaft 5. A plurality of abutment wheels 9 capable of contacting the main shaft 5 are provided in the mounting frame 8, and a tightening adjustment mechanism 10 is provided between the two mounting frames 8;

[0053] It should be noted that the abutment wheels 9 are set and adjusted by the abutment adjustment mechanism 10. When the rotational force on the main shaft 5 is in the rated speed operation state, the plurality of abutment wheels 9 are away from the main shaft 5, so that the mechanical energy obtained at the main shaft 5 can be better converted into electrical energy through the double-fed wind turbine generator. When the speed of the main shaft 5 is too fast and reaches the safety limit, the abutment adjustment mechanism 10 is operated so that the plurality of abutment wheels 9 are evenly in contact with the outer surface of the main shaft 5, thereby realizing the overspeed protection of the main shaft 5, which is used to improve the stability of the main shaft 5 during operation.

[0054] A vertical sleeve 11, the vertical sleeve 11 is fixed to the top surface of the cabin 2, a mounting frame 12 is fixed to the inner wall of the vertical sleeve 11, a sliding sleeve 13 is slidably penetrated at the center of the top surface of the mounting frame 12, a rotating blade 14 is tightly sleeved on the top outer surface of the sliding sleeve 13, a duct opening and closing mechanism 15 matched with the rotating blade 14 is arranged on the top of the vertical sleeve 11, and a transmission switching mechanism 16 matched with the tight adjustment mechanism 10 is arranged between the sliding sleeve 13 and the main shaft 5;

[0055] It should be noted that when the main shaft 5 is at the rated speed, while the abutment adjustment mechanism 10 is used to adjust the abutment wheel 9 away from the main shaft 5, the air duct opening and closing mechanism 15 and the transmission switching mechanism 16 move synchronously, so that the rotating blade 14 is raised in the vertical sleeve 11 along with the sliding sleeve 13. At this time, the rotating blade 14 is subjected to the transmission effect of the air duct opening and closing mechanism, so that the rotating blade 14 can be synchronously rotated by the horizontal wind force. When the rotating blade 14 is in the rising process, it is subjected to the transmission effect of the transmission switching mechanism 16, so that the wind force mechanical energy received by the rotating blade 14 is transmitted through the transmission switching mechanism 16, so as to further improve the rotation smoothness of the main shaft 5.

[0056] When the main shaft 5 is rotating too fast to the safety limit, the abutment wheel 9 is first brought into contact with the main shaft 5 through the action of the abutment adjustment mechanism 10, and then the air inlet at the vertical sleeve 11 is closed through the cooperation of the air duct opening and closing mechanism 15 and the transmission switching mechanism 16. At the same time, the rotating blades 14 move downward in the vertical sleeve 11 along with the sliding sleeve 13, thereby releasing the transmission cooperation between the main shaft 5 and the rotating blades 14. At the same time, the mechanical energy obtained by the wind turbine at the main shaft 5 drives the structure below the rotating blades 14 to idle, causing it to lose some mechanical energy, and then the main shaft 5 is protected from overspeed when it is running at an overspeed, effectively ensuring the operating stability of the main shaft 5 at this time.

[0057] Further as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 7 and Figure 8 As shown, it is worth specifically explaining that the tightening adjustment mechanism 10 includes a fixing seat 101, two fixing seats 101 are provided and both are fixed to the bottom inner wall of the cabin 2, a rotating gear 102 is rotatably connected between the two fixing seats 101, a stepping motor 103 coaxially fixed with the rotating gear 102 is provided on the bottom inner wall of the cabin 2, a U-shaped rack rod 104 is meshedly connected below the rotating gear 102, and the top end of the U-shaped rack rod 104 slides through the outer surface of the cabin 2 and is fixed to the outer surface of one of the mounting frames 8;

[0058] A push rod 105, which is arranged opposite to the U-shaped rack rod 104 and slides through the outer surface of the cabin 2, and the bottom end of the push rod 105 is fixed to the outer surface of another mounting frame 8, and an L-shaped rack rod 106 is meshed and connected above the rotating gear 102, and the L-shaped rack rod 106 is fixed to the bottom end of the push rod 105;

[0059] It should be noted that the rotating gear 102 is rotated by the drive of the stepper motor 103. Since the U-shaped rack rod 104 and the L-shaped rack rod 106 are respectively meshed and connected below and above the rotating gear 102, the U-shaped rack rod 104 and the push rod 105 move in opposite directions with the rotation of the rotating gear 102, that is, the two mounting frames 8 are moved away from or closer to each other, and the main shaft 5 is switched between the rated speed state and the overspeed state, respectively, so as to adjust the outer surface of the abutment wheel 9 and the outer surface of the main shaft 5 to move away from or in contact with each other.

[0060] Further as Figure 1 , Figure 2 , Figure 3 , Figure 5 , Figure 8 , Fig. 9 , Fig.10 , Fig.11 and Fig.12 As shown, it is worth specifically explaining that the air duct opening and closing mechanism 15 includes a blocking block 151, and the blocking block 151 is provided with two groups, and each group of blocking blocks 151 is rotatably installed on the outer surface of the vertical sleeve 11 at an equal angle, and the top of the vertical sleeve 11 is provided with an opening and closing gear 152 fixed coaxially with multiple blocking blocks 151 in a one-to-one manner, and the multiple opening and closing gears 152 located on the same side are meshed and connected with an arc-shaped rack rod 153, and the bottom outer surface of the two arc-shaped rack rods 153 is provided with a limit ring 154 fixed to the top surface of the vertical sleeve 11;

[0061] A sealing cover 155 is fixed to the top of the vertical sleeve 11. A guide ring 156 is fixed to the top surface of the sealing cover 155 and the outer surface of the vertical sleeve 11. The outer surface of the end of the guide ring 156 is connected to an air inlet pipe 157. An air outlet channel 158 is provided on the outer surface of the end of the guide ring 156 away from the air inlet pipe 157. An opening and closing member 159 for synchronous rotation of the two arc-shaped rack rods 153 is provided at the air outlet channel 158.

[0062] The opening and closing member 159 includes a connecting block 1591, which is matched with the air outlet channel 158 and fixed to the top of the push rod 105. A push rack rod 1592 is fixed to the outer surface of the connecting block 1591.

[0063] Pushing gear 1593, two pushing gears 1593 are provided and are respectively engaged with the outer teeth on both sides of the pushing rack rod 1592, and the pushing gear 1593 is coaxially fixed with the opening and closing gear 152 located at the end of the arc-shaped rack rod 153;

[0064] It should be noted that the stepper motor 103 drives the rotating gear 102 to rotate until the abutting wheel 9 contacts the main shaft 5. Through the meshing transmission of the rotating gear 102 and the L-shaped rack rod 106, the pushing rod 105 drives the connecting block 1591 and the pushing rack rod 1592 to move synchronously toward the center of the vertical sleeve 11. At this time, through the meshing transmission of the pushing rack rod 1592 and the pushing gear 1593, the arc-shaped rack rods 153 on both sides rotate in a direction away from the pushing rack rod 1592, and through the meshing transmission of the arc-shaped rack rod 153 and the opening and closing gear 152, the blocking blocks 151 on the same side rotate in the same direction, that is, the blocking blocks 151 block the top of the vertical sleeve 11, so that the rotating blades 14 are not affected by external wind in the vertical sleeve 11, thereby achieving preliminary protection for the rotating blades 14;

[0065] When the stepper motor 103 drives the abutment wheel 9 to be out of contact with the main shaft 5, the push rod 105 moves outward at the cabin 2, and the push rod 105 drives the connecting block 1591 and the rack rod 1592 to move synchronously toward the periphery of the vertical sleeve 11. At this time, the movement mode of the blocking block 151 is opposite to the above-mentioned movement process, that is, the blocking blocks 151 on both sides form an open processing on the top of the vertical sleeve 11. At this time, the rotating blades 14 transmit the wind force to the guide ring 156 through the air inlet pipe 157, so that the rotating blades 14 can rotate, so that through the cooperation of the transmission switching mechanism 16, the mechanical energy generated by the rotation of the rotating blades 14 is transmitted to the main shaft 5, thereby further improving the utilization rate of the mechanical energy of the main shaft 5 at the rated speed.

[0066] Further as Figure 5 , Fig. 9 , Fig.10 and Fig.12 As shown, it is worth to explain in detail that the outer surface of the end of the blocking block 151 extending out of the vertical casing 11 is arranged in an arc surface, and the vertical cross section of the guide ring 156 is arranged in a two-stage isosceles trapezoid;

[0067] It should be noted that the shape of the guide ring 156 allows wind to be transported through the air inlet pipe 157 when the sealing block 151 opens the air inlet channel of the rotating blade 14, thereby forming a wind flow channel in the guide ring 156. The setting of the arc surface of the sealing block 151 allows wind to enter the air inlet channel better, thereby improving the wind capture capability of the rotating blade 14 at the vertical sleeve 11 to a certain extent.

[0068] Further as Figure 3 , Figure 4 , Figure 7 , Fig. 9 , Fig.10 , Fig.12 and Fig.13 As shown, it is worth specifically explaining that the transmission switching mechanism 16 includes a transmission sleeve 161, which is rotatably mounted on the top inner wall of the nacelle 2, and the bottom outer surface of the sliding sleeve 13 extends to the top inner wall of the transmission sleeve 161. A pressing piece 162 that matches the sliding sleeve 13 is arranged between the plurality of blocking blocks 151, and a bevel gear 163 is fastened and sleeved on the outer surface of the transmission sleeve 161 and the main shaft 5, and the two bevel gears 163 are meshedly connected;

[0069] A fixing rod 164, the fixing rod 164 is fixed at the center of the inner wall of the transmission sleeve 161, a docking block 165 is provided inside the sliding sleeve 13 and is tightly sleeved on the top outer surface of the fixing rod 164, a slot 166 is provided on the bottom inner wall of the sliding sleeve 13 and is matched with the docking block 165, a rotating block 167 is rotatably embedded on the bottom outer surface of the sliding sleeve 13, and a compression spring 168 is provided on the outer surface of the fixing rod 164 and is fixed to the opposite surfaces of the rotating block 167 and the transmission sleeve 161;

[0070] The pressing member 162 includes a pressing plate 1621, which is located above the rotating blade 14 and fixed to the top of the sliding sleeve 13. The top outer surface of the pressing plate 1621 is fitted with an extrusion block 1622.

[0071] A connecting plate 1623, the top surface and the bottom surface of the connecting plate 1623 are respectively fixed to the opposite surfaces of the pushing rack rod 1592 and the extrusion block 1622;

[0072] The contact surfaces of the pressing plate 1621 and the extruding block 1622 are matching arc surfaces, and the projected circle diameter of the pressing plate 1621 is equal to the diameter of the vertical sleeve 11;

[0073] It should be noted that when the blocking block 151 seals the vertical sleeve 11, the rack rod 1592 is pushed to drive the connecting plate 1623 and the extrusion block 1622 to move simultaneously. At this time, the extrusion block 1622 squeezes the arc surface of the pressing plate 1621, so that the pressing plate 1621, the rotating blade 14 and the sliding sleeve 13 move downward synchronously. At this time, the blocking block 151 of the vertical sleeve 11 is sealed by the pressing plate 1621, thereby further improving the protection of the rotating blade 14.

[0074] When the pressing plate 1621, the rotating blade 14 and the sliding sleeve 13 move downward, the bottom of the sliding sleeve 13 compresses the pressing spring 168 through the rotating block 167 until the docking block 165 and the card slot 166 of the sliding sleeve 13 are separated from each other.

[0075] When the main shaft 5 is in an overspeed state to a safety limit, the bevel gear 163 on the main shaft 5 drives the transmission sleeve 161 to rotate on the top inner wall of the nacelle 2 through the meshing transmission effect with the bevel gear 163 on the transmission sleeve 161, and the fixed rod 164 located in the transmission sleeve 161 rotates synchronously. Since the rotating block 167 is rotatable at the bottom of the sliding sleeve 13, and the docking block 165 and the docking groove are separated up and down, the rotating blades 14 do not rotate synchronously with the rotation of the transmission sleeve 161 at this time, that is, part of the mechanical energy generated by the main shaft 5 through the wind turbine is used for idling at the transmission sleeve 161, thereby forming a protective treatment for the main shaft 5 in the overspeed state and a separate protection for the rotating blades 14, and the air inlet pipe 157 is deflected and adjusted according to the yaw system provided in the random cabin 2. At this time, the air inlet direction of the air inlet pipe 157 is as follows Fig.11 As shown, the wind enters vertically, and the wind in the horizontal direction enters vertically from the air inlet pipe 157, passes through the internal flow channel of the guide ring 156, and is discharged from the air outlet channel 158;

[0076] It should be noted that when the blocking block 151 opens the vertical sleeve 11, the sliding sleeve 13 is moved upward in the transmission sleeve 161 through the elastic force of the compression spring 168, and the docking block 165 is docked and engaged with the card slot 166. At the same time, the sliding sleeve 13 drives the rotating blade 14 and the pressing plate 1621 to move upward, so that the wind force transmitted from the guide ring 156 is connected at the rotating blade 14, so that the wind force can also drive the rotating blade 14 to rotate, thereby driving the transmission sleeve 161 to rotate synchronously, and through the meshing transmission of the two bevel gears 163, the main shaft 5 can rotate smoothly at the rated speed. In addition, the wind between the top surface of the pressing plate 1621 and the bottom surface of the sealing cover 155 enters from the blocking block 151 at the air inlet pipe 157 until it is discharged from the air outlet channel 158. Fig.15 shown.

[0077] This scheme has the following working process: when the impeller blades 4 capture the natural wind energy, it drives the main shaft 5 to rotate inside the nacelle 2. At this time, the abutment wheel 9 is moved away from the main shaft 5 through the adjustment process of the abutment adjustment mechanism 10. Since the air inlet pipe 157 is integrally arranged with the nacelle 2, when the nacelle 2 deflects with the yaw system, the air inlet pipe 157 and the impeller blades capture wind energy in the best state. At this time, the air inlet direction of the air inlet pipe 157 is at the best angle. Since the rotating blades 14 rotate in a circular motion, the air inlet direction of the rotating blades 14 through the air inlet pipe 157 at this time is inclined at a better angle than the vertical air inlet. Through the mutual cooperation of the air duct opening and closing mechanism 15 and the transmission switching mechanism 16, the blocking block 151 opens the top of the vertical duct. At the same time, the sliding sleeve 13 follows the transmission action of the transmission switching mechanism 16, so that the rotating blades 14 and the pressing plate 1621 are in the middle of the multiple blocking blocks 151. Fig.12 and Fig.13 The rotating blade 14 is located in the middle, and the rotating blade 14 is clamped by the sliding sleeve 13 and the transmission sleeve 161, that is, the horizontal wind force of nature is transmitted by the rotation of the rotating blade 14 and the meshing of the two bevel gears 163. At this time, the rotating blade 14 is Fig.14 As shown, it drives the sliding sleeve 13 and the transmission sleeve 161 to rotate synchronously, and through the transmission action of the two bevel gears 163, the horizontal wind energy is converted into the mechanical energy of the main shaft 5 by transmission, so that the impeller blades 4 and the rotating blades 14 can capture the wind energy in nature in an integrated manner, thereby better converting it into the mechanical energy of the main shaft 5, providing further guarantee for the subsequent conversion of mechanical energy into electrical energy through the gear box 6 and the double-fed wind turbine generator set 7, greatly improving the utilization rate of natural wind energy;

[0078] When the wind speed is too high in bad weather, the impeller blades 4 reduce the capture of wind energy in nature through the dual effects of the pitch system and the yaw system. At this time, the multiple abutment wheels 9 are fully in contact with the main shaft 5 through the adjustment of the abutment adjustment mechanism 10. At the same time, the air duct opening and closing mechanism 15 and the transmission switching mechanism 16 operate synchronously. At this time, the blocking block 151 seals the top of the vertical sleeve 11, and the wind delivered through the air inlet pipe 157 flows through the guide ring 156 and the wind flow channel of the vertical sleeve 11. At the same time, the pressing plate 1621 drives the rotating blades 14 to move downward in the vertical sleeve 11. , so that the pressing plate 1621 moves to the bottom of the blocking block 151 to perform a closed protection treatment on the rotating blades 14. At this time, the sliding sleeve 13 is easy to release the synchronous rotation effect with the transmission sleeve 161. At this time, the main shaft 5 is in contact with multiple abutment wheels 9. At the same time, the transmission sleeve 161 is idle through the transmission of two bevel gears 163, which effectively improves the overspeed protection performance of the main shaft 5 in weather with too fast wind speed, that is, the stability of the main shaft 5 when rotating at high speed. At the same time, the rotating blades 14 can achieve double closed protection through the blocking block 151 and the pressing plate 1621, and release the transmission coordination with the main shaft 5, forming multiple protections for the rotating blades 14.

[0079] According to the above working process, it can be known that when the impeller blades 4 capture the wind energy in nature, they drive the main shaft 5 to rotate inside the nacelle 2. Through the adjustment process of the tight adjustment mechanism 10 and the mutual cooperation of the air duct opening and closing mechanism 15 and the transmission switching mechanism 16, the horizontal wind energy can be converted into the mechanical energy of the main shaft 5 by transmission through the setting of the rotating blades 14, so that the impeller blades 4 and the rotating blades 14 can capture the wind energy in nature in an integrated manner, so as to better convert it into the mechanical energy of the main shaft 5, and provide further guarantee for the subsequent conversion of mechanical energy into electrical energy through the gear box 6 and the double-fed wind turbine generator set 7, which greatly improves the utilization rate of natural wind power;

[0080] Through the dual effects of the variable pitch system and the yaw system, the impeller blades 4 reduce the capture of wind energy in nature. Through the adjustment processing of the abutment adjustment mechanism 10, the wind duct opening and closing mechanism 15 and the transmission switching mechanism 16 are driven to operate synchronously, so that the main shaft 5 can be abutted against multiple abutment wheels 9 and the transmission sleeve 161 can be idle, which effectively improves the overspeed protection performance of the main shaft 5 under the condition of excessive wind speed. At the same time, the rotating blades 14 can achieve double closed protection through the blocking block 151 and the pressing plate 1621, and release the transmission coordination with the main shaft 5, forming multiple protections for the rotating blades 14, and effectively ensuring the stability of the main shaft 5 during high-speed operation.

[0081] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art. The general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A combined wind power generation device for improving wind energy utilization efficiency, comprising a tower (1) and a nacelle (2) rotatably mounted on the top surface of the tower (1), characterized in that: Also includes: A wheel hub (3), the wheel hub (3) being rotatably mounted on a side wall of the nacelle (2), the wheel hub (3) being mounted with three impeller blades (4) distributed at equal angles, a main shaft (5) fixed to the center of the wheel hub (3) being mounted inside the nacelle (2), a gear box (6) connected to the main shaft (5) being arranged inside the nacelle (2), and a side of the gear box (6) away from the main shaft (5) being connected to a doubly-fed wind turbine generator set (7) via a coupling; An installation frame (8), wherein two installation frames (8) are provided and are symmetrically distributed along the axis of the main shaft (5), a plurality of abutment wheels (9) capable of contacting the main shaft (5) are provided in the installation frame (8), and a tightening adjustment mechanism (10) is provided between the two installation frames (8); A vertical sleeve (11), the vertical sleeve (11) being fixed to the top surface of the cabin (2), a mounting frame (12) being fixed to the inner wall of the vertical sleeve (11), a sliding sleeve (13) slidingly penetrating the center of the top surface of the mounting frame (12), a rotating blade (14) being tightly sleeved on the top outer surface of the sliding sleeve (13), an air duct opening and closing mechanism (15) cooperating with the rotating blade (14) being provided at the top of the vertical sleeve (11), and a transmission switching mechanism (16) cooperating with the pressing adjustment mechanism (10) being provided between the sliding sleeve (13) and the main shaft (5); The abutment adjustment mechanism (10) comprises: A fixing seat (101), wherein two fixing seats (101) are provided and both are fixed to the bottom inner wall of the cabin (2), a rotating gear (102) is rotatably connected between the two fixing seats (101), a stepping motor (103) is provided on the bottom inner wall of the cabin (2) and is coaxially fixed to the rotating gear (102), a U-shaped rack rod (104) is meshingly connected below the rotating gear (102), and the top end of the U-shaped rack rod (104) slides through the outer surface of the cabin (2) and is fixed to the outer surface of one of the mounting frames (8); A push rod (105) is arranged opposite to the U-shaped rack rod (104) and slides through the outer surface of the cabin (2); the bottom end of the push rod (105) is fixed to the outer surface of another mounting frame (8); the top of the rotating gear (102) is meshedly connected with an L-shaped rack rod (106); the L-shaped rack rod (106) is fixed to the bottom end of the push rod (105).

2. The combined wind power generation device for improving wind energy utilization efficiency according to claim 1, characterized in that: The air duct opening and closing mechanism (15) comprises: A blocking block (151), wherein the blocking blocks (151) are provided with two groups, and each group of blocking blocks (151) is rotatably mounted on the outer surface of the vertical sleeve (11) at an equal angle, and an opening and closing gear (152) is provided on the top of the vertical sleeve (11) and is coaxially fixed to the plurality of blocking blocks (151) in a one-to-one manner, and an arc-shaped rack rod (153) is meshed and connected between the plurality of opening and closing gears (152) located on the same side, and a limiting ring (154) is provided on the outer surface of the bottom of the two arc-shaped rack rods (153) and is fixed to the top surface of the vertical sleeve (11); A sealing cover (155), the sealing cover (155) is fixed to the top end of the vertical sleeve (11), a guide ring (156) is fixed to the top surface of the sealing cover (155) and the outer surface of the vertical sleeve (11), the outer surface of the end of the guide ring (156) is connected to an air inlet pipe (157), an air outlet channel (158) is provided on the outer surface of the end of the guide ring (156) away from the air inlet pipe (157), and an opening and closing member (159) for synchronous rotation of two arc-shaped rack rods (153) is provided at the air outlet channel (158).

3. The combined wind power generation device for improving wind energy utilization efficiency according to claim 2, characterized in that: The opening and closing member (159) comprises: A connecting block (1591), the connecting block (1591) is arranged in cooperation with the air outlet channel (158) and is fixed to the top end of the push rod (105), and a push rack rod (1592) is fixed to the outer surface of the connecting block (1591); The pushing gear (1593) is provided with two pushing gears (1593) and is respectively connected to the outer teeth on both sides of the pushing rack rod (1592) in meshing engagement. The pushing gear (1593) and the opening and closing gear (152) located at the end of the arc-shaped rack rod (153) are coaxially fixedly arranged.

4. The combined wind power generation device for improving wind energy utilization efficiency according to claim 2, characterized in that: The outer surface of the end portion of the blocking block (151) extending out of the vertical sleeve (11) is arranged in the form of an arc surface, and the vertical cross-section of the guide ring (156) is arranged in the form of a two-section isosceles trapezoid.

5. The combined wind power generation device for improving wind energy utilization efficiency according to claim 3, characterized in that: The transmission switching mechanism (16) comprises: A transmission sleeve (161), the transmission sleeve (161) being rotatably mounted on the top inner wall of the cabin (2), the bottom outer surface of the sliding sleeve (13) extending to the top inner wall of the transmission sleeve (161), a pressing piece (162) matching the sliding sleeve (13) being arranged between the plurality of blocking blocks (151), a bevel gear (163) being fastened and sleeved on the outer surfaces of the transmission sleeve (161) and the main shaft (5), and two of the bevel gears (163) being meshingly connected; A fixing rod (164) is fixed at the center of the inner wall of the transmission sleeve (161); a docking block (165) is provided inside the sliding sleeve (13) and is tightly sleeved on the top outer surface of the fixing rod (164); a groove (166) is provided on the bottom inner wall of the sliding sleeve (13) and is matched with the docking block (165); a rotating block (167) is rotatably embedded in the bottom outer surface of the sliding sleeve (13); and a compression spring (168) is provided on the outer surface of the fixing rod (164) and is fixed to the opposite surfaces of the rotating block (167) and the transmission sleeve (161).

6. The combined wind power generation device for improving wind energy utilization efficiency according to claim 5, characterized in that: The pressing member (162) comprises: A pressing plate (1621), the pressing plate (1621) being located above the rotating blade (14) and fixed to the top end of the sliding sleeve (13), and a pressing block (1622) being provided in close contact with the top outer surface of the pressing plate (1621); The connecting plate (1623) has its top surface and bottom surface fixed to the opposite surfaces of the pushing rack rod (1592) and the extrusion block (1622) respectively.

7. The combined wind power generation device for improving wind energy utilization efficiency according to claim 6, characterized in that: The contact surfaces of the pressing plate (1621) and the extrusion block (1622) are matching arc surfaces, and the projected circle diameter of the pressing plate (1621) is equal to the diameter of the vertical sleeve (11).

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