Tower drum type double-wind-power wind turbine

Abstract

The invention discloses a tower drum type double-wind-power wind turbine. The tower drum type double-wind-power wind turbine comprises a tower drum, a wind cap and a wind wheel, the top end of the tower drum is rotationally connected with the air cap, and the interior of the air cap communicates with the interior of the tower drum. A vertically-arranged main shaft is arranged in the middle of the air cap, the top end of the main shaft is fixedly connected with a top plate of the air cap, and the bottom end of the main shaft extends into the tower drum. The main shaft is a hollow shaft, the middle part of the main shaft is rotatably connected with an auxiliary shaft group, the auxiliary shaft group is composed of a plurality of auxiliary shafts which are coaxially sleeved in sequence from outside to inside, the auxiliary shafts are hollow shafts, every two adjacent auxiliary shafts are rotatably connected, the auxiliary shaft on the outermost layer is coaxial and rotatably connected with the main shaft, and the auxiliary shaft on the outermost layer is rotatably connected with the main shaft. The two ends of the auxiliary shaft set extend out of the main shaft respectively, and the two ends of the inner-layer auxiliary shaft extend out of the outer-layer auxiliary shaft adjacent to the inner-layer auxiliary shaft respectively. A plurality of connecting rods are fixed to the outer wall of the top end of each auxiliary shaft in the radial direction of the auxiliary shaft, and the wind wheels are fixed to the tail ends of the connecting rods.

Description

Technical Field

[0001] The present invention relates to the technical field of wind power generation, and in particular to a tower-type double-wind turbine. Background Art

[0002] Wind turbines are a core component of modern renewable energy. They capture wind energy through their blades, drive a generator through a transmission system, and ultimately generate electricity, converting natural wind energy into clean, renewable electricity. They are crucial for addressing the global energy crisis and achieving carbon neutrality goals. Traditional wind turbines primarily include vertical-axis wind turbines and horizontal-axis wind turbines. Vertical-axis wind turbines have uneven blade force, requiring higher wind speeds to start and exhibiting weaker power generation capabilities in low-wind environments. Horizontal-axis wind turbines typically require a relatively stable wind speed of 3-4 m / s to start. In areas with an average annual wind speed below 6 m / s, they experience fewer power generation hours and are less economical.

[0003] Traditional wind turbines often require higher wind speeds to start generating electricity. However, wind tunnel wind turbines, due to their special wind tunnel structure, use the wind tunnel to gather airflow, increasing the wind speed entering the wind tunnel, allowing the blades to capture wind energy at higher wind speeds, converting the wind energy into mechanical energy, and then driving the generator to generate electricity. They can continuously output electricity without relying on strong winds, breaking through the limitations of high wind speed power generation of traditional wind turbines.

[0004] The existing patent "CN102182639A - Tower-Type Wind Tunnel Power Generation Device" discloses a tower with its lower end fixed to a base. Multiple air intakes are evenly spaced below the tower, and a generator with blades is fixed to the upper end of the tower. Technical issues include: Blades placed inside the tower fragment the wind field, reducing wind energy and resulting in suboptimal overall wind energy utilization. Some wind power cannot be effectively converted into electricity. When the speed and density of low-altitude natural wind are low, the rotor rotates slowly, affecting power generation efficiency.

[0005] The existing patent "CN201739089U - Chimney-type wind turbine" discloses a wind rotor and a generator, with a transmission device connecting the rotor shaft and the generator shaft, as well as a chimney with an air inlet at the bottom and an air outlet at the top. The chimney has a truncated cone-shaped air guide plate at the top, with the wind rotor mounted above the plate. Technical problems include: at low wind speeds, the wind pressure generated is insufficient to drive the blades to provide reliable output, affecting the stability of power generation and limiting its application in low wind speed areas. Summary of the Invention

[0006] The object of the present invention is to provide a tower-type double-wind wind turbine.

[0007] The present invention is implemented by the following technical solutions: a tower-type double-wind turbine, which includes a tower, a main shaft, a wind cap, a secondary shaft, and a wind wheel; The interior of the tower is equipped with an air inlet chamber, a speed increasing chamber, and a pressure chamber which are interconnected from bottom to top. The main shaft is rotatably provided in the middle of the tower, and the top cover of the tower is provided with a rotatably connected wind cap, the interior of the wind cap is communicated with the interior of the tower, and the wind cap is sleeved and fixed on the main shaft; The main shaft is a hollow shaft, and the middle part of the main shaft is rotatably connected to a secondary shaft group. The secondary shaft group is composed of a plurality of secondary shafts coaxially sleeved from the outside to the inside. The secondary shafts are hollow shafts, and two adjacent secondary shafts are rotatably connected. The outermost secondary shaft is coaxial with the main shaft and rotatably connected. Both ends of each secondary shaft in the secondary shaft group extend to the outside of the main shaft; both ends of the secondary shaft in the inner layer of the secondary shaft group extend to the outside of the secondary shaft in the adjacent outer layer. A plurality of connecting rods are fixed to the outer wall of the top end of each secondary shaft along its radial direction, the wind wheel is fixed to the end of the connecting rod, and the windward surface of the wind wheel is provided with a wind collecting groove.

[0008] Furthermore, the hood includes a top plate, an annular bottom plate, blades, and a guide plate, and a plurality of blades are fixedly connected between the top plate and the annular bottom plate; Each of the blades is circumferentially arranged along the axis of the hood, and an outwardly extending windshield is provided on the outer end edge of each blade, the windshield comprising a first bent portion and a second bent portion, the first bent portion being a trapezoidal plate, the second bent portion being a triangular plate or a trapezoidal plate, the second bent portion being fixedly connected to the blade via the first bent portion, an angle a between the first bent portion and the windward surface of the blade being 155°-165°, and an angle b between the first bent portion and the windward surface of the second bent portion being 145°-155°; A plurality of guide plates arranged along the radial direction of the hood are vertically fixed to the bottom end surface of the top plate, and the guide plates are placed between the main input shaft and the blades.

[0009] Furthermore, an air outlet is provided at the top end of the air inlet chamber, a lower air inlet is provided at the bottom end of the air inlet chamber, and a plurality of partitions are fixed to the inner wall of the air inlet chamber. The partitions are radially distributed with the axis of the air inlet chamber and are arranged along the direction of air flow. The partitions divide the air inlet chamber into several side guide channels, and the side walls of the air inlet chamber are provided with at least one side air inlet corresponding to each of the side guide channels along the direction of air flow.

[0010] Furthermore, guide vanes are fixedly provided on the outer wall of the side air inlet.

[0011] Furthermore, a vertically arranged guide tube is provided in the middle of the air inlet chamber, the partition is placed between the outer wall of the guide tube and the inner wall of the air inlet chamber, and a lower air inlet is provided at the bottom end of the guide tube. The guide tube is connected to the outside through the lower air inlet, and a central guide channel is formed inside the guide tube.

[0012] Furthermore, a Tesla valve is provided inside the speed increasing chamber, and the Tesla valve includes a valve body and a gas channel.

[0013] Furthermore, at least one group of guide components is fixed to the inner wall of the speed increasing chamber, and each group of the guide components includes a plurality of guide plates or guide blocks arranged at equal intervals, and the guide plates or guide blocks are arranged upwardly tilted, and each guide plate or each guide block is arranged along the length direction of the speed increasing chamber.

[0014] Furthermore, turbine blades and spiral blades are fixed on the main shaft in the boost chamber in sequence from top to bottom.

[0015] Furthermore, a power assist device is provided in the boost chamber, and the power assist device includes a stator assembly and a rotor assembly. The stator assembly is fixedly connected to the inner wall of the tower, and the rotor assembly placed in the stator assembly is fixedly mounted on the main shaft.

[0016] Furthermore, an induced draft fan is included. The induced draft fan is provided inside the tower between the air inlet chamber and the speed increasing chamber, and the induced draft fan is fixedly connected to the inner wall of the tower via a positioning frame.

[0017] Advantages of the present invention: By utilizing the pressure difference, when the speed and density of the low-altitude natural wind are low, the airflow is sent to the tower through the air inlet chamber. Under the action of the speed-increasing chamber and the pressure-increasing chamber of the tower, the airflow is accelerated and pressurized. The wind cap is driven to rotate under the action of the strong airflow, and the wind cap drives the main shaft to rotate faster, converting wind energy into mechanical energy, realizing the utilization of low-altitude wind energy. The wind cap is set on the top of the tower. Since the wind cap rotates as a whole, compared with the independent blade form in the existing technology, it has no effect on the wind field inside the tower. The airflow inside the tower acts completely on the wind cap, which improves the utilization rate of wind energy and ensures the efficiency of power generation. The natural wind at high altitude is fully utilized to drive the rotation of the wind wheel. The rotation of the wind wheel drives the corresponding secondary shaft to rotate, converting wind energy into mechanical energy, realizing the utilization of natural wind at high altitude. The multi-layer wind wheel is used to capture the natural wind at different heights, realizing the utilization of high altitude wind energy. At the same time, the main shaft and the secondary shaft are set separately to reduce the resistance of the overall drive. The device realizes the capture of low-altitude wind and high-altitude wind at the same time. Through the wind cap and the wind wheel, the continuous operation of the wind turbine is realized by mutual assistance, which further guarantees the power generation of the wind turbine. At the same time, with the cooperation of the induced draft fan and the power assisting device, even under low wind speed conditions, it can ensure that the device has sufficient wind volume and wind speed, thereby maintaining the stability of wind power generation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 A schematic diagram of the installation structure of the invention; Figure 2 A perspective view of the hood and countershaft assembly of the invention; Figure 3 This is a front view of the hood and countershaft assembly of the invention; Figure 4 It is a front view of the blade in the invention; Figure 5 This is a schematic structural diagram of Example 1; Figure 6 Schematic diagram of the structure of the air inlet chamber in Example 1; Figure 7 Schematic diagram of the flow guide assembly in Example 1 being a long strip guide plate; Figure 8 Schematic diagram of the flow guide component in Example 1 being a triangular guide plate; Figure 9 This is a schematic diagram of the guide block in Example 1; Figure 10 This is a first stereoscopic view of the air inlet chamber in Example 2; Figure 11 This is a second perspective view of the air inlet chamber in Example 2; Figure 12 Schematic diagram of the structure of the speed increasing chamber in Example 3; Figure: tower 1, air inlet chamber 1.1, speed increasing chamber 1.2, boost chamber 1.3, hood 2, top plate 2.1, annular bottom plate 2.2, blades 2.3, deflector 2.4, wind shield 2.5, first bend 2.5.1, second bend 2.5.2, main shaft 3, stabilizer 4, secondary shaft assembly 5, secondary shaft 5.1, connecting rod 6, wind rotor 7, air collecting trough 7.1, guide tube 8, lower air inlet 9.1, side air inlet 9.2, guide vane Plate 9.3, air outlet 9.4, central guide channel 10, partition 11, side guide channel 12, Tesla valve 13, valve body 13.1, gas channel 13.2, guide assembly 14, guide plate 14.1, guide block 14.2, spiral blade 15, turbine blade 16, power assist device 17, stator assembly 17.1, rotor assembly 17.2, induced draft fan 18, positioning frame 19, photovoltaic panel 20, support frame 21, foundation 22. DETAILED DESCRIPTION

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0021] Example 1: like Figure 1-9 As shown, a tower-type double-wind wind turbine includes a tower 1, a wind cap 2, and a wind wheel 7; A main shaft 3 is rotatably provided in the middle of the tower 1. Specifically, the inner wall of the tower 1 is fixed with stabilizing frames 4 arranged up and down. The main shaft 3 is connected to the stabilizing frames 4 through bearings, and the stabilizing frames 4 provide stable support for the main shaft 3; the top cover of the tower 1 is provided with a rotatably connected wind cap 2, the interior of the wind cap 2 is connected to the interior of the tower 1, and the wind cap 2 is sleeved and fixed on the main shaft 3.

[0022] The hood 2 includes a top plate 2.1, an annular bottom plate 2.2, blades 2.3, and guide plates 2.4. A number of blades 2.3 are fixedly connected between the top plate 2.1 and the annular bottom plate 2.2. Each blade 2.3 is circumferentially arranged along the axis of the hood 2, and the outer edge of each blade 2.3 is provided with a wind shield 2.5 extending outward. A number of guide plates 2.4 arranged along the radial direction of the hood 2 are vertically fixed to the bottom end face of the top plate 2.1. The guide plates 2.4 are placed between the main shaft and the blades 2.3. The rising airflow inside the tower 1 applies a force to the wind shield 2.5, which increases the thrust of the rising airflow inside the tower 1 on the blades 2.3, increases the rotation speed of the hood 2, and further improves the power generation efficiency. The guide plates 2.4 can evenly guide the airflow inside the tower 1 to the gaps between each blade 2.3, making the wind output more uniform.

[0023] The windshield 2.5 includes a first bend 2.5.1 and a second bend 2.5.2. The first bend 2.5.1 is a trapezoidal plate, and the second bend 2.5.2 is a triangular plate or a trapezoidal plate. The second bend 2.5.2 is fixedly connected to the blade 2.3 via the first bend 2.5.1. The angle a between the first bend 2.5.1 and the windward surface of the blade 2.3 is 155°-165°, and the angle b between the windward surfaces of the first bend 2.5.1 and the second bend 2.5.2 is 145°-155°. The force of the rising airflow on the tower 1 is applied to the first bend 2.5.1 and the second bend 2.5.2. The airflow pushes the first bend 2.5.1 and the second bend 2.5.2, increasing the rotation speed of the hood 2 while also preventing external natural wind from entering the interior of the hood 2, reducing airflow disturbances within the tower.

[0024] The main shaft 3 is a hollow shaft, with a secondary shaft group 5 rotatably connected to the middle of the main shaft 3. The secondary shaft group 5 consists of several secondary shafts 5.1 coaxially arranged from the outside to the inside. The secondary shafts 5.1 are hollow shafts, and adjacent secondary shafts 5.1 are rotatably connected to each other. The outermost secondary shaft 5.1 is coaxial with the main shaft 3 and rotatably connected to it. The two ends of each secondary shaft 5.1 in the secondary shaft group 5 extend to the outside of the main shaft 3. The two ends of the inner secondary shaft 5.1 in the secondary shaft group 5 extend to the outside of the adjacent outer secondary shaft 5.1. The top outer wall of each secondary shaft 5.1 is radially fixed with a plurality of connecting rods 6, the ends of which are fixed with wind rotors 7. The windward surface of the wind rotor 7 is provided with a wind collecting groove 7.1. The wind collecting groove 7.1 increases the windward surface and wind collecting effect, enabling smooth self-starting even at low wind speeds, reducing the wind speed requirement and improving wind energy utilization efficiency. Natural wind is used to drive the wind rotor 7 to rotate, and the rotation of the wind rotor 7 drives the corresponding secondary shaft 5.1 to rotate, converting the captured wind energy into mechanical energy. The rotation of the secondary shaft 5.1 drives the generator to rotate, realizing the conversion of mechanical energy into electrical energy and improving the power generation efficiency and rated power of the dual wind turbine. By arranging wind rotors 7 on each secondary shaft 5.1, natural wind at different heights can be captured, and the rotation resistance of a single secondary shaft 5.1 is relatively low.

[0025] The interior of the tower 1 is provided with an air inlet chamber 1.1, a speed increasing chamber 1.2 and a pressure chamber 1.3 which are interconnected from bottom to top.

[0026] An air outlet 9.4 is provided at the top of the air inlet chamber 1.1, and a lower air inlet 9.1 is provided at the bottom of the air inlet chamber 1.1. A plurality of partitions 11 are fixed to the inner wall of the air inlet chamber 1.1. The partitions 11 are radially distributed along the axis of the air inlet chamber 1.1 and arranged along the direction of airflow. The partitions 11 divide the air inlet chamber 1.1 into a plurality of side guide channels 12. At least one side air inlet 9.2 is opened along the direction of airflow on the side wall of the air inlet chamber 1.1 corresponding to each side guide channel 12. The number of side air inlets 9.2 is determined according to the length of the air inlet chamber, such as Figure 10 As shown, each side guide channel 12 is provided with a side air inlet 9.2 along the air flow direction; Figure 11 As shown, each side guide channel 12 is provided with a plurality of side air inlets 9.2 along the air flow direction, and a guide blade 9.3 is fixedly provided on the outer wall of the side air inlet. Under the action of the lower air inlet 9.1 and the side air inlet 9.2, natural wind energy enters the air inlet chamber 1.1 from multiple directions.

[0027] The speed increasing chamber 1.2 is provided with a guide assembly 14. The inner wall of the speed increasing chamber 1.2 is fixed with at least one set of guide assemblies 14. The structure of the guide assembly 14 is more. This embodiment only provides the following but is not limited to them. Figure 7 As shown, each group of guide components 14 includes a plurality of long strip guide plates 14.1 arranged at equal intervals; Figure 8 As shown, each group of guide components 14 includes a plurality of triangular guide plates 14.1 arranged at equal intervals; Figure 9 As shown, each group of guide components 14 is a guide block 14.2 arranged at equal intervals; the guide plates 14.1 or the guide blocks 14.2 are arranged upwardly tilted, and each guide plate 14.1 or each guide block 14.2 is arranged along the length direction of the speed increasing chamber 1.2. The guide plate 2.4 has a convergent effect. As the airflow encounters the guide plate 2.4, the airflow is prompted to converge, which can achieve a non-return effect. As the contact area decreases, the flow rate of the fluid increases.

[0028] Turbine blades 16 and spiral blades 15 are fixed to the main shaft 3 in the boost chamber 1.3, from top to bottom. A booster device 17 is installed in the boost chamber 1.3. The booster device 17 comprises a stator assembly 17.1 and a rotor assembly 17.2. Stator assembly 17.1 is fixedly connected to the inner wall of the tower 1. Rotor assembly 17.2 is mounted and fixed to the main shaft 3 and is housed within stator assembly 17.1.

[0029] Specifically, the stator assembly 17.1 and the rotor assembly 17.2 are well-known technologies, which are described in detail as follows. The rotor assembly 17.2 includes a permanent magnet and a rotor bracket. The rotor bracket is fixedly mounted on the main shaft 3, and the permanent magnet is mounted on the rotor bracket. The winding on the stator assembly 17.1 is supplied with three-phase alternating current. After the current is supplied, a rotating magnetic field is formed in the winding. Since the permanent magnet is mounted on the rotor bracket, the magnetic poles of the permanent magnet are fixed. According to the principle that like poles attract and opposite poles repel, the rotating magnetic field generated in the stator assembly 17.1 drives the permanent magnet to rotate. Since the permanent magnet and the rotor bracket are in contact, the permanent magnet rotates. Fixed connection drives the rotor bracket to rotate, and the rotor bracket also drives the main shaft 3 to rotate. When the wind speed is low and the air intake is small, the main shaft 3 can be driven to rotate by the power assist device 17. During the rotation of the main shaft 3, the spiral blades 15 and the turbine blades 16 are driven to rotate, which increases the circulation speed of the airflow and increases the wind pressure, so that the wind flows upward, drives the hood 2 to rotate, and the rotation of the hood 2 drives the main shaft 3 to rotate. When the hood 2 is started, the power assist device 17 can be closed, and the internal airflow is driven by the rotation of the hood 2 itself, and then the mechanical energy of the main shaft 3 is converted into electrical energy, thereby increasing the utilization rate of wind energy.

[0030] It also includes an induced draft fan 18. The induced draft fan 18 is installed inside the tower 1 between the air inlet chamber 1.1 and the speed increasing chamber 1.2. The induced draft fan 18 is fixedly connected to the inner wall of the tower 1 through a positioning frame 19. When the wind force is relatively low, the induced draft fan 18 is used to drive the surrounding still air to form an air flow. Under the action of the pressure difference of the tower 1 itself, the air flow flows upward, and with the cooperation of the boost chamber 1.3, the air flow is pressurized and accelerated to be sent to the wind cap 2.

[0031] Other power supply equipment is also included for emergency use to supply power to the power assist device and the induced draft fan. In this embodiment, the power supply equipment includes a solar photovoltaic module. The photovoltaic panel 20 of the solar photovoltaic module is fixed to the outer wall of the tower 1. The solar photovoltaic module (which is a prior art and the specific components are not shown in the figure) uses solar energy to generate electricity. The solar photovoltaic module generates electricity and converts direct current into three-phase alternating current through an inverter. When the wind speed is weak, the battery is used to supply power to the induced draft fan 18 and the power assist device 17, and the induced draft fan 18 and the power assist device 17 are used to assist the rotation of the main shaft 3.

[0032] The main shaft 3 and each secondary shaft 5.1 are respectively connected to the generator through a transmission device. The specific structural composition of the transmission device is not the focus of protection of this application. As long as the mechanical energy of each shaft can be transmitted to the generator, the transmission device used in this embodiment can adopt but is not limited to the following scheme. The transmission device includes multiple existing transmissions. When there is one main shaft 3 and multiple secondary shafts 5.1, the main shaft 3 and each secondary shaft 5.1 correspond to a transmission, and each transmission corresponds to a generator to achieve independent transmission and power generation; or, when there is one main shaft and one secondary shaft, the transmission device can refer to the existing patent CN202732231U - A wind power generation device, wherein the main shaft 3 in this application corresponds to the hollow shaft 4 in the existing patent, and the secondary shaft 5.1 in this application corresponds to the shaft 3 in the existing patent.

[0033] The specific operation process of this embodiment is as follows: When the device is in use, the top of the foundation 22 is fixedly connected to the bottom end of the tower 1 through the support frame 21; When the device is operating normally, the air pressure difference between the bottom and top of the tower 1 is utilized, and the low-altitude natural wind at the bottom of the tower 1 enters the tower 1 through the air inlet chamber 1.1. Under the action of the side guide channel 12 of the air inlet chamber 1.1, an upward wind tunnel airflow is formed. Under the action of the guide component 14 in the speed increasing chamber 1.2, the reverse flow is stopped and the wind speed is increased. The airflow ejected from the air outlet at the top of the tower 1 blows the blades 2.3 of the hood 2, causing the hood 2 to rotate. During the rotation of the hood 2, the main shaft 3 rotates, and during the rotation of the main shaft 3, the spiral blades 15 and the turbine blades 16 in the boosting chamber 1.3 are driven to rotate. Under the action of the spiral blades 15 and the turbine blades 16, the air flow is guided and pressurized, which can force the upward thrust of the continuous airflow, making the airflow ejected from the outlet of the tower 1 strong, further driving the rotation of the hood. The hood 2 rotates, driving the main shaft 3 to rotate, converting the wind energy of the low-altitude natural wind into mechanical energy, which is then converted into electrical energy through the power generation component; At this time, the wind rotor at the top of the tower 1 rotates driven by the natural wind at high altitude, and the corresponding secondary shaft 5.1 rotates at the same time. The rotation of the secondary shaft 5.1 converts the wind energy of the natural wind at high altitude into mechanical energy, which is then converted into electrical energy through the power generation component. The wind energy of high-altitude natural wind and low-altitude natural wind is superimposed on each other, which increases the utilization rate of wind energy. Wind energy is further converted into electrical energy through mechanical energy, ensuring that the device can continuously output electrical energy and ensure the stability of power generation; At relatively low wind speeds, the induced draft fan 18 is started to disturb the surrounding air, converting the low-speed, low-density natural wind into air flow, which flows through the air inlet chamber 1.1 into the tower 1. Utilizing the pressure difference between the bottom and the top of the tower 1, the airflow forms an upward wind tunnel airflow under the action of the side guide channel 12 of the air inlet chamber 1.1. The airflow is stopped and the wind speed is increased under the action of the guide component 14 in the speed increasing chamber 1.2, and then enters the boosting chamber 1.3. The boosting device 17 in the boosting chamber 1.3 is started. Under the action of the boosting device 17, the spiral blades 15 and the turbine blades 16 are driven to rotate. Under the action of the spiral blades 15 and the turbine blades 16, the airflow is guided and pressurized, which can force the upward thrust of the sustainable airflow, making the airflow ejected from the outlet of the tower 1 strong. The wind cap 2 on the tower 1 drives the rotating torque vector. When the wind cap 2 rotates, the main shaft 3 rotates, converting the wind energy of the low-altitude natural wind into mechanical energy, which is converted into electrical energy through the power generation component. At this time, the wind rotor 7 at the top of the tower 1 rotates driven by the high-altitude natural wind, and the corresponding secondary shaft 5.1 rotates at the same time. The rotation of the secondary shaft 5.1 converts the wind energy of the high-altitude natural wind into mechanical energy, which is converted into electrical energy through the power generation component; The low-altitude and high-altitude natural winds are captured by the wind cap 2 and the wind wheel 7, and the wind energy of the high-altitude natural wind and the wind energy of the low-altitude natural wind are superimposed on each other, thereby increasing the utilization rate of wind energy. The wind energy is further converted into electrical energy through mechanical energy, ensuring that the device can continuously output electrical energy and ensuring the stability of power generation.

[0034] Example 2: like Figure 10-11 As shown, the only difference between this embodiment and embodiment 1 is that the structure of the air inlet chamber 1.1 is different. In this embodiment, a vertically arranged guide tube 8 is provided in the middle of the air inlet chamber 1.1, and a partition 11 is placed between the outer wall of the guide tube 8 and the inner wall of the air inlet chamber 1.1. A lower air inlet 9.1 is provided at the bottom end of the guide tube 8. The guide tube 8 is connected to the outside through the lower air inlet 9.1. A central guide channel 10 is formed inside the guide tube 8, and the number of side air inlets 9.2 is determined according to the length of the air inlet chamber. Under the action of the lower air inlet 9.1 and the side air inlet 9.2, natural wind can enter the air inlet chamber 1.1 from multiple directions. With the cooperation of the central guide channel 10 and the side guide channel 12, the wind enters the air inlet chamber 1.1 without disturbing each other, and flows upward along the central guide channel 10 and the side guide channel 12, ensuring the rising effect of the wind.

[0035] Example 3: like Figure 12As shown, the difference between this embodiment and embodiment 1 is that the internal structure of the speed increasing chamber 1.2 is different. In this embodiment, a Tesla valve 13 is provided inside the speed increasing chamber 1.2. The Tesla valve 13 includes a valve body 13.1 and a gas channel 13.2. The outer wall of the valve body of the Tesla valve 13 is fitted and fixed to the inner wall of the speed increasing chamber 1.2. There are many forms of the gas channel 13.2 inside the Tesla valve 13. This embodiment only provides one form. The structures of other forms of the gas channel 13.2 also belong to the protection content of this application. The Tesla valve 13 has a non-return function. At the same time, the airflow is in a convergent state when passing through the Tesla valve 13. As the contact area decreases, the flow rate of the fluid increases.

[0036] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. Tower type double wind turbine, characterized in that, It includes a tower, a main shaft, a wind cap, a secondary shaft, and a wind wheel; The interior of the tower is equipped with an air inlet chamber, a speed increasing chamber, and a pressure chamber which are interconnected from bottom to top. The main shaft is rotatably provided in the middle of the tower, and the top cover of the tower is provided with a rotatably connected wind cap, the interior of the wind cap is communicated with the interior of the tower, and the wind cap is sleeved and fixed on the main shaft; The main shaft is a hollow shaft, and the middle part of the main shaft is rotatably connected to a secondary shaft group. The secondary shaft group is composed of a plurality of secondary shafts coaxially sleeved from the outside to the inside. The secondary shafts are hollow shafts, and two adjacent secondary shafts are rotatably connected. The outermost secondary shaft is coaxial with the main shaft and rotatably connected. Both ends of each secondary shaft in the secondary shaft group extend to the outside of the main shaft; both ends of the secondary shaft in the inner layer of the secondary shaft group extend to the outside of the secondary shaft in the adjacent outer layer. A plurality of connecting rods are fixed to the outer wall of the top end of each secondary shaft along its radial direction, the wind wheel is fixed to the end of the connecting rod, and the windward surface of the wind wheel is provided with a wind collecting groove.

2. The tower-type double-wind turbine according to claim 1, characterized in that: The hood includes a top plate, an annular bottom plate, blades, and a guide plate, and a plurality of blades are fixedly connected between the top plate and the annular bottom plate; Each of the blades is circumferentially arranged along the axis of the hood, and an outwardly extending windshield is provided on the outer end edge of each blade, the windshield comprising a first bent portion and a second bent portion, the first bent portion being a trapezoidal plate, the second bent portion being a triangular plate or a trapezoidal plate, the second bent portion being fixedly connected to the blade via the first bent portion, an angle a between the first bent portion and the windward surface of the blade being 155°-165°, and an angle b between the first bent portion and the windward surface of the second bent portion being 145°-155°; A plurality of guide plates arranged along the radial direction of the hood are vertically fixed to the bottom end surface of the top plate, and the guide plates are placed between the main input shaft and the blades.

3. The tower-type double-wind turbine according to claim 1, characterized in that: An air outlet is provided at the top of the air inlet chamber, and a lower air inlet is provided at the bottom end of the air inlet chamber. A plurality of partitions are fixed to the inner wall of the air inlet chamber. The partitions are radially distributed with the axis of the air inlet chamber and are arranged along the direction of airflow. The partitions divide the air inlet chamber into a plurality of side guide channels. The side walls of the air inlet chamber are provided with at least one side air inlet corresponding to each of the side guide channels along the direction of airflow.

4. The tower-type double-wind turbine according to claim 3, characterized in that: A guide vane is fixedly provided on the outer wall of the side air inlet.

5. The tower-type double-wind turbine according to claim 1, characterized in that: A vertically arranged guide tube is provided in the middle of the air inlet chamber, the partition is placed between the outer wall of the guide tube and the inner wall of the air inlet chamber, and a lower air inlet is provided at the bottom end of the guide tube. The guide tube is connected to the outside through the lower air inlet, and a central guide channel is formed inside the guide tube.

6. The tower-type double-wind turbine according to claim 1, characterized in that: A Tesla valve is provided inside the speed increasing chamber, and the Tesla valve includes a valve body and a gas channel.

7. The tower-type double-wind turbine according to claim 1, characterized in that: At least one group of guide components is fixed to the inner wall of the speed increasing chamber, and each group of the guide components includes a plurality of guide plates or guide blocks arranged at equal intervals. The guide plates or guide blocks are arranged upwardly tilted, and each guide plate or each guide block is arranged along the length direction of the speed increasing chamber.

8. The tower-type double-wind turbine according to claim 1, characterized in that: Turbine blades and spiral blades are fixed on the main shaft in the boost chamber in sequence from top to bottom.

9. The tower-type double-wind turbine according to claim 8, characterized in that: The boost chamber is further provided with a power-assisting device, which includes a stator assembly and a rotor assembly. The stator assembly is fixedly connected to the inner wall of the tower, and the rotor assembly placed in the stator assembly is fixedly mounted on the main shaft.

10. The tower-type double-wind turbine according to any one of claims 1 to 9, characterized in that: The tower also includes an induced draft fan, which is provided inside the tower between the air inlet chamber and the speed increasing chamber. The induced draft fan is fixedly connected to the inner wall of the tower via a positioning frame.

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