Ducted wind driven generator with contra-rotating wind wheels

Abstract

The ducted wind driven generator comprises a wind wheel part, a motor part and a connecting part, the wind wheel part comprises an upstream rotor and a downstream rotor which are oppositely arranged and rotate in opposite directions, and the motor part is arranged on the outer sides, away from each other, of the upstream rotor and the downstream rotor. The motor part is connected with the two rotors through a coupling of the connecting part, the connecting part comprises an interstage connector connected with the coupling, and the interstage connector provided with a shaft sleeve type rotation coupling structure is arranged on the opposite inner sides of the upstream rotor and the downstream rotor and connects the upstream rotor and the downstream rotor in a manner of providing relative rotational freedom. As the upstream rotor and the downstream rotor rotate in opposite directions, the torques generated by the upstream rotor and the downstream rotor can cancel each other. The torque balance is beneficial for reducing the torque acting force on the supporting structure, so that the stability of the whole wind driven generator is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of wind generators, in particular to a ducted wind generator with counter-rotating wind wheels. Background Art

[0002] Throughout the long history of wind power technology, and with the growing demand for renewable energy, wind turbines, as a key source of clean energy, have undergone a remarkable evolution from simple to complex, and from inefficient to highly efficient. Early wind turbines mostly employed a single-impeller design, offering a simple structure and ease of maintenance. However, due to the limitations of capturing wind energy at a single point, their energy conversion efficiency was relatively low. With continuous technological advancements and innovations, engineers have begun exploring more efficient ways to harness wind energy, hoping to improve the overall effectiveness of wind power generation.

[0003] Against this backdrop, the concept of dual-impeller wind turbines emerged and quickly became a research hotspot. Compared to traditional single-impeller designs, dual-impeller wind turbines achieve the capture and utilization of wind energy over a wider range by adding additional impellers. This design not only widens the swept area of wind energy, but also enhances the stability and response speed of the generator to a certain extent through the synergistic effect of the two impellers. In addition, the dual-impeller layout may also provide more possibilities for structural optimization and performance improvement of wind turbines. For example, by adjusting parameters such as the relative position, rotation speed or direction between the impellers, more efficient wind energy conversion and more flexible operating modes can be achieved.

[0004] However, as the research on dual-impeller wind turbines deepens, some problems that need to be solved have gradually been exposed, especially how to maintain the stability and efficiency of the system under complex wind conditions.

[0005] CN209943006U discloses a ducted turbine AC / DC wind turbine generator, comprising a casing, an AC / DC generator fixedly mounted inside the casing via a bracket, a front impeller and a rear impeller fixedly mounted on the left and right ends of the AC / DC generator, respectively, a power output cable electrically connected to the AC / DC generator, and the power output cable extends to the outside of the casing, and a fixing seat is integrally provided at the bottom of the casing.

[0006] The wind turbine described in this patent uses a unique casing design designed to concentrate wind power to improve energy conversion efficiency. In its internal structure, the AC / DC generator is firmly mounted on the bracket, and the front and rear impellers are respectively installed at both ends of the generator, both of which are designed to rotate at high speed to capture more wind energy. With this configuration, the wind turbine can efficiently drive the impellers to rotate under the action of wind power, and then convert the wind energy into electrical energy through the AC / DC generator. However, because the front and rear impellers of the wind turbine of this patent adopt a layout that rotates in the same direction, in strong wind conditions, when the two impellers act together on the supporting structure, a significant cumulative torque effect will inevitably be generated. This additional torque load places more stringent requirements on the strength and rigidity of the supporting structure, and may even affect the stability of the wind turbine.

[0007] In addition, on the one hand, due to differences in understanding among those skilled in the art; on the other hand, because the applicant studied a large number of documents and patents when making this utility model, but due to space limitations, not all details and contents are listed in detail. However, this does not mean that the utility model does not have the characteristics of these prior arts. On the contrary, the utility model already has all the characteristics of the prior art, and the applicant reserves the right to add relevant prior art to the background technology. Utility Model Content

[0008] In response to the shortcomings of the prior art, the present application proposes a ducted wind turbine with counter-rotating wind rotors, aiming to solve one or more technical problems in the prior art.

[0009] The utility model relates to a ducted wind turbine with counter-rotating wind rotors, which includes a wind rotor portion, a motor portion and a connecting portion. The wind rotor portion includes an upstream rotor and a downstream rotor which are arranged opposite to each other and rotate in opposite directions. The motor portion is arranged on the outer sides of the upstream rotor and the downstream rotor which are away from each other, and the motor portion is connected to the two rotors by means of a coupling of the connecting portion. The connecting portion includes an interstage connector connected to the coupling, wherein the interstage connector with a shaft sleeve type self-rotating coupling structure is arranged on the inner sides relative to the upstream rotor and the downstream rotor, and connects the upstream rotor and the downstream rotor by providing relative rotational freedom.

[0010] Because the upstream and downstream rotors rotate in opposite directions, the torques they generate can cancel each other out. This torque balance helps reduce torque forces on the support structure, thereby improving the stability of the entire wind turbine. The motor unit is located on the outer sides of the two rotors, facing away from each other. This layout helps maintain the wind turbine's center of gravity and reduces vibration and torque fluctuations caused by uneven wind distribution. The motor unit is connected to the two rotors via a coupling. This design allows the motor unit to rotate synchronously with the rotors while maintaining a compact structure. The interstage connector uses a sleeve-type self-rotating coupling structure and is located on the inner sides of the upstream and downstream rotors. This structure provides relative rotational freedom, allowing the two rotors to rotate independently while maintaining a mechanical connection, helping to improve the flexibility and stability of the entire ducted wind turbine. The relative rotational freedom provided by the interstage connector allows the upstream and downstream rotors to maintain dynamic balance during rotation, reducing the torque impact on the support structure. By offsetting torque, potential technical issues that may arise with dual-impeller wind turbines, such as torque imbalance and poor stability, are resolved or at least alleviated.

[0011] According to a preferred embodiment, the sleeve-type self-rotation coupling structure of the interstage connector includes an interstage shaft, a sleeve and a rotating bushing. The interstage shaft and the sleeve can be connected to each other, and the sleeve-connected portion of the interstage shaft and the sleeve is equipped with a rotating bushing for reducing rotational friction. The interstage shaft and the sleeve can both be connected to the wind wheel part using the mounting surface with a plurality of bolt mounting holes, wherein when the interstage shaft is connected to one of the rotors of the wind wheel part, the sleeve is connected to the other rotor of the wind wheel part. The sleeve-type self-rotation coupling structure allows the interstage shaft and the sleeve to be connected to the two rotors within a limited space, maintaining the compactness of the wind turbine structure. The mounting surfaces of the interstage shaft and the sleeve are equipped with a plurality of bolt mounting holes, which allows precise matching and stable connection with the wind wheel part by bolt tightening, ensuring the coaxiality and centering accuracy between the rotor and the shaft. The use of the rotating bushing reduces the rotational friction of the interstage shaft and the sleeve at the sleeve-connected portion, which helps to improve the smoothness of rotation, reduce energy loss, and extend the service life of the equipment.

[0012] According to a preferred embodiment, the connection portion includes an adapter shaft for transmitting the mechanical energy generated by the rotation of the rotor portion to the motor portion. One end of the adapter shaft forms a mounting surface for connection to the upstream or downstream rotor, and the other end is connected to a coupling. One end of the adapter shaft is connected to the rotor, and the other end is connected to the coupling. This creates a stable torque transmission path, enhancing the structural stability of the entire wind turbine. Thus, the design of the adapter shaft enables the mechanical energy generated by the rotation of the rotor portion to be efficiently and losslessly transmitted to the motor portion, ensuring the continuity and efficiency of energy conversion.

[0013] According to a preferred embodiment, the motor unit includes a generator and a motor housing for housing the generator. A motor mounting plate is removably provided on the side of the motor housing near the rotor unit, and the generator can be mounted on the inner side of the motor mounting plate. The design of the motor housing allows the generator to be compactly mounted near the rotor unit, reducing the distance required for energy transfer and thereby improving overall mechanical efficiency.

[0014] According to a preferred embodiment, the generator's motor shaft can be connected to the coupling through a through-hole formed in the motor mounting plate. This through-hole design allows for precise alignment between the motor shaft and the coupling, ensuring efficient and coaxial energy transfer from the rotor to the motor, minimizing energy loss during transfer. Directly connecting the motor shaft through the through-hole to the coupling simplifies installation, reduces adjustments, and improves assembly efficiency.

[0015] According to a preferred embodiment, the ducted wind turbine includes a support portion for installing itself in the duct, and the support portion is connected to the motor portion in the form of an annular frame structure formed on the outside of the rotor portion. The support portion forms an annular frame structure on the outside of the rotor portion, providing a solid peripheral support for the wind turbine. The design of the support portion allows the wind turbine to be easily installed in the duct, simplifies the installation process, shortens the installation time, and improves the installation efficiency. The connection between the annular frame structure and the motor portion helps to maintain the dynamic balance of the wind turbine under the action of wind, reduce vibration, and improve the smoothness of operation.

[0016] According to a preferred embodiment, the annular frame structure formed by the support portion includes two frame units, either of which can be arranged around the outside of a motor box connected to an upstream rotor or a downstream rotor, wherein the two frame units are connected to form a whole through a number of axial support tubes. The two frame units can be configured to be coplanar with the motor box and connected to form a whole through axial support tubes, thereby increasing the rigidity of the entire wind turbine structure and enabling it to withstand greater wind loads. The design of the frame unit helps to evenly distribute the torque and bending moment generated by the wind, reduce local stress concentration, and extend the service life of the structure. The coplanar design allows for precise alignment of the wind wheel portion and the motor box, ensuring the coaxiality between the rotor and the generator and improving the efficiency of energy transfer.

[0017] According to a preferred embodiment, the frame unit includes several circumferential support tubes and several end hinged joints for connecting adjacent circumferential support tubes. The end hinged joints connect to the axial support tubes via their respective connection ports. The end hinged joints connect adjacent circumferential support tubes and, through the connection ports, to the axial support tubes, forming a stable annular frame structure, enhancing the stability of the entire wind turbine.

[0018] According to a preferred embodiment, the support portion includes a plurality of hinged housing joints connected to the surface of the motor housing. These hinged housing joints are connected to radial support tubes that define the position of the frame unit relative to the motor housing. The radial support tubes extend outward away from the motor housing and are capable of connecting to some of the end hinged joints. The connection between the hinged housing joints and the surface of the motor housing provides precise spatial positioning for the frame unit, ensuring the structural stability of the wind turbine and the alignment accuracy between components. The design of the radial support tubes helps to more effectively transfer the load from the rotor portion to the motor housing, thereby distributing it throughout the entire support structure and reducing local stress concentration.

[0019] According to a preferred embodiment, the end hinge joints include three-way hinge joints and four-way hinge joints. The three-way hinge joint can be connected to the circumferential support tube and the axial support tube, while the four-way hinge joint can be connected to the circumferential support tube, the axial support tube, and the radial support tube. The use of three-way and four-way hinge joints increases the connection points of the support structure, improves the overall rigidity, and helps to resist deformation and vibration caused by wind. This configuration allows the support part to transfer loads in multiple directions, enhancing the stability and reliability of the wind turbine support structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the overall structure of the wind turbine of the present invention;

[0021] Figure 2 This is a schematic structural diagram of the wind wheel portion of the utility model from a first viewing angle;

[0022] Figure 3 This is a schematic structural diagram of the wind wheel portion of the utility model at a second viewing angle;

[0023] Figure 4 This is a schematic diagram of the connection relationship between the wind wheel part and the interstage connector of the utility model;

[0024] Figure 5 This is a schematic diagram of the connection relationship between the wind wheel part and the adapter shaft of the utility model;

[0025] Figure 6 This is a schematic diagram of the connection relationship between the wind wheel part and the coupling of the utility model;

[0026] Figure 7 This is a schematic diagram of the connection relationship between the wind wheel part and the motor part (excluding the motor box) of the utility model from the first perspective;

[0027] Figure 8 This is a schematic diagram of the connection relationship between the wind wheel part and the motor part (with the motor box retained) of the utility model from a second viewing angle;

[0028] Figure 9This is a schematic diagram of the connection structure between the support part, the motor part and the wind wheel part of the utility model;

[0029] Figure 10 It is a partial structural diagram of the end hinge joint and the box hinge joint of the utility model.

[0030] Reference Signs List

[0031] 100: wind wheel part; 110: upstream rotor; 120: downstream rotor; 200: motor part; 210: generator; 220: motor box; 230: motor mounting plate; 300: connecting part; 310: interstage connector; 311: interstage shaft; 312: shaft sleeve; 313: rotating bushing; 320: adapter shaft; 330: coupling; 400: supporting part; 410: box hinge joint; 420: radial support tube; 430: end hinge joint; 431: three-way hinge joint; 432: four-way hinge joint; 440: circumferential support tube; 450: axial support tube. DETAILED DESCRIPTION

[0032] The present invention will be described in detail below with reference to the accompanying drawings.

[0033] The utility model relates to a ducted wind turbine with counter-rotating wind rotors. Figure 1 、 Figure 2 As shown, it includes a rotor section 100, a motor section 200, a connection section 300, and a support section 400. The rotor section 100 is the core component of the wind turbine, primarily responsible for capturing wind energy and converting it into mechanical energy. It includes an upstream rotor 110 and a downstream rotor 120, which are arranged opposite each other and rotate in opposite directions, forming a counter-rotating rotor structure. The motor section 200 is arranged on the outer sides of the upstream rotor 110 and the downstream rotor 120, facing away from each other, and is capable of converting the mechanical energy generated by the rotor section 100 into electrical energy. The connection section 300, as the key structure connecting the rotor section 100 and the motor section 200 in the wind turbine, provides the upstream rotor 110 and the downstream rotor 120 with relative rotational freedom and transmits the rotational motion of the two rotors to the motor. The support section 400 serves as the mounting base for the wind turbine. By forming a frame structure outside the motor section 200 and the rotor section 100, it allows the entire wind turbine to be installed within the duct structure.

[0034] Preferably, if Figures 2 to 6As shown, the connection portion 300 includes a coupling 330 and an interstage connector 310. In the wind turbine of the present invention, two couplings 330 are preferably configured, one located on the opposite outer sides of the upstream rotor 110 and the other on the downstream rotor 120. This layout allows each coupling 330 to be directly connected to its corresponding rotor, effectively receiving and transmitting the rotational torque generated by the rotor. The connection between the interstage connector 310 and the coupling 330 further enhances the coordination between the rotors. The interstage connector 310 has a shaft-sleeve autorotation coupling structure and is configured on the opposite inner sides of the upstream rotor 110 and the downstream rotor 120. This structural design enables the interstage connector 310 to provide the necessary relative rotational freedom between the two rotors, allowing the upstream rotor 110 and the downstream rotor 120 to rotate in opposite directions, and the torques generated by them to offset each other. This torque balance helps reduce the torque acting on the support structure, thereby improving the stability of the entire wind turbine.

[0035] Preferably, if Figure 4 As shown, the sleeve-type self-rotation coupling structure in the interstage connector 310 includes an interstage shaft 311, a sleeve 312 and a rotating bushing 313. The interstage shaft 311 serves as the main connecting element, passing through the center or specific position of the upstream rotor 110 and the downstream rotor 120, providing support and positioning for the relative rotation of the rotors. The sleeve 312 is mounted on the interstage shaft 311, tightly fitting with the corresponding part of the rotor to ensure a stable connection between the rotor and the shaft. The rotating bushing 313 is mounted inside the sleeve 312 or the rotor, and can reduce friction and wear through its internal lubrication components (such as oil grooves, oil holes, etc.), thereby improving the smoothness and efficiency of rotation. In addition, the sleeve-type self-rotation coupling structure of the interstage connector 310 also includes a number of bolt mounting holes, which enable the interstage shaft 311 and the sleeve 312 to be firmly connected to the wind wheel part 100.

[0036] Preferably, if Figure 4 As shown, the ends of the interstage shaft 311 and the sleeve 312 that are away from each other are each provided with a mounting surface that can be connected to the rotor part 100. The mounting surface ensures that the contact surfaces of the interstage shaft 311 and the sleeve 312 with the rotor part 100 can be precisely matched. The bolt mounting holes on the mounting surface are designed according to a certain distribution pattern to facilitate the passage of bolts and tightening connection to form a rigid structural connection. By passing the bolts through the bolt mounting holes on the mounting surface, the interstage shaft 311 and the sleeve 312 can be tightly connected to the corresponding components of the rotor part 100. The tightening of the bolts ensures the reliability and long-term stability of the connection, and maintains the integrity of the structure even under variable wind conditions.

[0037] Preferably, if Figure 5 、 Figure 6As shown, the coupling 330 is connected to the upstream rotor 110 or the downstream rotor 120 via the adapter shaft 320. One end of the adapter shaft 320 can form a mounting surface, which can be connected to the surface of the upstream rotor 110 or the downstream rotor 120 using a mechanical connection method such as a threaded connection. This allows mechanical energy to be transmitted from the wind wheel part 100 to the coupling 330 through the other end of the adapter shaft 320 without loss, and then converted into electrical energy by the motor part 200.

[0038] Preferably, if Figure 7 、 Figure 8 As shown, the motor unit 200 includes a generator 210 and a motor box 220 for accommodating the generator 210. The motor box 220 is a protective shell of the motor unit 200, which provides a stable installation environment for the generator 210. The design of the motor box 220 takes into account the physical protection of the generator 210 and the isolation from external environmental factors such as moisture, dust and corrosion. In addition, a detachable motor mounting plate 230 is configured on one side of the motor box 220. The motor mounting plate 230 is a detachable component inside the motor box 220, which is located on the side close to the wind wheel unit 100. The inner side of the motor mounting plate 230 is designed with components such as mounting holes or flanges that are easy to install. These components match the corresponding structures of the generator 210, ensuring the precise positioning and stable installation of the generator 210. Through this design, the motor main shaft of the generator 210 can be accurately docked with the coupling 330 on the adapter shaft 320, realizing the effective transmission of mechanical energy. Specifically, motor mounting plate 230 has a through-hole formed throughout it. This design allows the main shaft of generator 210 to pass directly through the hole, achieving precise docking with coupling 330. The through-hole design not only provides a direct mechanical connection path, but its size and shape are precisely designed to match the main shaft of the motor, ensuring coaxiality between the main shaft and coupling 330. Coaxiality is crucial for reducing mechanical stress and vibration during the transmission process, helping to improve energy transmission efficiency and the smooth operation of the entire wind turbine.

[0039] Preferably, if Figure 9As shown, the support portion 400 can form an annular frame structure outside the wind wheel portion 100 and be connected to the motor portion 200. Specifically, the annular frame structure includes two frame units, which are preferably parallel to the rotating surface of the upstream rotor 110 or the downstream rotor 120 and remain coplanar with the motor box 220. These frame units not only provide the necessary support, but also achieve a compact layout of the wind turbine by being designed to be coplanar with the motor box 220. In particular, each frame unit remains in the same plane as the rotating surface of the corresponding upstream rotor 110 or downstream rotor 120. This design allows the wind turbine to maintain dynamic balance during rotation and reduces vibration and stress caused by rotor imbalance. The two frame units are also connected by a number of axial support tubes 450. These axial support tubes 450 serve as connecting elements, not only enhancing the structural rigidity of the entire support portion 400, but also providing an effective load transfer path, ensuring the stability of the wind turbine under various wind speed conditions.

[0040] Preferably, if Figure 9 As shown, the frame unit of the support part 400 is used to ensure the stability and load-bearing capacity of the entire wind turbine. The structure includes a number of circumferential support tubes 440 and a number of end hinge joints 430. These components together form a stable annular structure to support the rotating parts of the wind turbine and absorb the load generated by the wind. The circumferential support tubes 440 can be arranged along the periphery of the wind rotor part 100, which helps to evenly distribute the moment and bending moment generated by the wind on the wind rotor. The circumferential support tubes 440 can generally be made of high-strength materials to ensure that the wind turbine maintains structural stability and durability during long-term operation. The end hinge joints 430 are distributed at the ends of the circumferential support tubes 440 and are connected to the axial support tubes 450 through the connection ports they are equipped with. This design allows the end hinge joints 430 to transfer loads between the circumferential support tubes 440.

[0041] Preferably, if Figure 9As shown, the support portion 400 is connected to the surface of the motor case 220 via several hinged joints 410. These hinged joints 410 serve as stable connection points between the frame unit and the motor case 220, enabling precise positioning of the frame unit. The hinged joints 410 are designed to ensure compatibility with the motor case 220 and a secure connection. They can be manufactured from high-strength materials and feature suitable mating surfaces and fastening elements to ensure a stable and reliable connection with the motor case 220. The hinged joints 410 enable the frame unit to maintain the correct position and orientation relative to the motor case 220, in accordance with predetermined design requirements. Specifically, the hinged joints 410 extend radial support tubes 420. These radial support tubes 420 extend outward, away from the motor case 220. Their length and position are determined by the size and structure of the wind turbine. The distal ends of the radial support tubes 420 become part of the frame unit by connecting to a partial end hinge 430, making the spatial structure of the support portion 400 more compact and stable.

[0042] Preferably, if Figure 9 、 Figure 10 As shown, the end hinge joint 430 includes a three-way hinge joint 431 and a four-way hinge joint 432. The design of these joints allows them to be connected to different types of support tubes, forming a multi-directional connection network. The three-way hinge joint 431 is designed to connect to the circumferential support tube 440 and the axial support tube 450, providing a stable triangular support structure. This joint design allows load transfer in three directions, increasing the stability of the structure. It also allows the axial support tube 450, which is orthogonal to the frame unit, to effectively transfer torque and bending moments between support tubes in different planes. The structure of the three-way hinge joint 431 is generally made of high-strength materials and is designed with precise mating surfaces to ensure a secure and flexible connection with the connecting tube. The four-way hinge joint 432 further expands the connection port for connecting to the radial support tube 420. This joint design allows load transfer in four directions, forming a more complex and stable support structure. The presence of the four-way hinge joint 432 enables the support structure to distribute the load more evenly in space, improving the wind turbine's adaptability to complex wind conditions.

[0043] It should be noted that the above-mentioned specific embodiments are exemplary, and those skilled in the art can come up with various solutions inspired by the disclosure of this utility model, and these solutions also belong to the disclosure scope of this utility model and fall within the protection scope of this utility model. Those skilled in the art should understand that the description of this utility model and its drawings are illustrative and do not constitute a limitation on the claims. The scope of protection of this utility model is defined by the claims and their equivalents. Throughout the text, the features guided by "preferably" are only an optional method and should not be understood as having to be set, so the applicant reserves the right to abandon or delete the relevant preferred features at any time.

Claims

1. A ducted wind turbine with a counter-rotating wind rotor, comprising a wind rotor portion (100), a motor portion (200) and a connecting portion (300), characterized in that: The wind wheel portion (100) comprises an upstream rotor (110) and a downstream rotor (120) which are arranged opposite to each other and rotate in opposite directions. The motor part (200) is arranged on the outer sides of the upstream rotor (110) and the downstream rotor (120) facing away from each other, and the motor part (200) is connected to the two rotors by means of a coupling (330) of the connecting part (300). The connecting portion (300) includes an interstage connector (310) connected to the coupling (330), wherein the interstage connector (310) having a shaft sleeve type rotation coupling structure is arranged on the inner side of the upstream rotor (110) and the downstream rotor (120) relative to each other, and connects the upstream rotor (110) and the downstream rotor (120) by providing relative rotational freedom.

2. The ducted wind turbine according to claim 1, wherein: The shaft sleeve type rotation coupling structure of the interstage connector (310) comprises an interstage shaft (311), a shaft sleeve (312) and a rotating bushing (313); the interstage shaft (311) and the shaft sleeve (312) can be sleeved with each other, and the sleeved portion of the interstage shaft (311) and the rotating bushing (313) is equipped with the rotating bushing (313) for reducing rotational friction. The interstage shaft (311) and the shaft sleeve (312) can both be connected to the wind wheel portion (100) using mounting surfaces provided with a plurality of bolt mounting holes, wherein when the interstage shaft (311) is connected to one of the rotors of the wind wheel portion (100), the shaft sleeve (312) is connected to the other rotor of the wind wheel portion (100).

3. The ducted wind turbine according to claim 2, wherein: The connecting portion (300) includes a transfer shaft (320) for transmitting mechanical energy generated by the rotation of the wind wheel portion (100) to the motor portion (200); one end of the transfer shaft (320) forms a mounting surface connected to the upstream rotor (110) or the downstream rotor (120), and the other end is connected to the coupling (330).

4. The ducted wind turbine according to claim 1, wherein: The motor part (200) comprises a generator (210) and a motor box (220) for accommodating the generator (210); a motor mounting plate (230) is detachably provided on a side of the motor box (220) close to the wind wheel part (100); and the generator (210) can be mounted on an inner side of the motor mounting plate (230).

5. The ducted wind turbine according to claim 4, characterized in that: The motor main shaft of the generator (210) can pass through a through hole formed in a through-hole form on the motor mounting plate (230) and be connected to the coupling (330).

6. The ducted wind turbine according to claim 4, characterized in that: The ducted wind turbine generator comprises a support portion (400) for installing the support portion in a duct, wherein the support portion (400) is connected to the motor portion (200) in the form of an annular frame structure formed outside the wind wheel portion (100).

7. The ducted wind turbine according to claim 6, characterized in that: The annular frame structure formed by the support portion (400) includes two frame units, and either frame unit can be arranged around the outside of the motor box (220) connected to the upstream rotor (110) or the downstream rotor (120), wherein the two frame units are connected to each other via a plurality of axial support tubes (450) to form a whole.

8. The ducted wind turbine according to claim 7, characterized in that: The frame unit comprises a plurality of circumferential support tubes (440) and a plurality of end hinged joints (430) for connecting adjacent circumferential support tubes (440). The end hinged joints (430) are connected to the axial support tubes (450) through their equipped connection ports.

9. The ducted wind turbine according to claim 8, characterized in that: The support portion (400) includes a plurality of box hinge joints (410) connected to the surface of the motor box (220), and the box hinge joints (410) are connected to radial support tubes (420) for defining the position of the frame unit relative to the motor box (220). The radial support tubes (420) extend outward in a direction away from the motor box (220) and are capable of being connected to some of the end hinge joints (430).

10. The ducted wind turbine according to claim 9, characterized in that: The end hinge joint (430) includes a three-way hinge joint (431) and a four-way hinge joint (432), wherein the three-way hinge joint (431) can be connected to the circumferential support tube (440) and the axial support tube (450), and the four-way hinge joint (432) can be connected to the circumferential support tube (440), the axial support tube (450) and the radial support tube (420).

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