A weak wind power generation system

Abstract

The application belongs to the technical field of weak wind power generation, and particularly relates to a weak wind power generation system, which comprises two transmission shafts, one of which is an inner rotating shaft, and the other is an outer rotating shaft, a conical convex head is fixedly connected to the inner rotating shaft, a fan blade is fixedly connected to the side surface of the conical convex head on the inner rotating shaft, two mounting discs are fixedly connected to the outer rotating shaft, three mounting supports are fixedly connected around the mounting disc, unequal matrix hollow holes are arranged on the mounting supports, helical leaves are fixedly connected to one end of the mounting supports, and helical blades are fixedly arranged between the two mounting supports. The unique structure design of the application effectively improves the wind energy capturing efficiency, and the system can stably operate in a weak wind environment. Through optimization of transmission and power generation components, energy loss is reduced, and efficient electric energy conversion is ensured. The miniaturized design facilitates installation and transportation, and the system can be widely applied to multiple fields, and provides strong support for solving energy problems.

Description

Technical Field

[0001] This invention relates to the field of low-wind power generation technology, specifically to a low-wind power generation system. Background Technology

[0002] Against the backdrop of ever-increasing energy demand and the gradual depletion of traditional energy sources, the development of renewable energy has become a global consensus, giving rise to small-scale low-wind power generation technology.

[0003] Traditional wind power generation typically focuses on large-scale wind farms, relying on strong wind resources. Its equipment is bulky, complex to install, has stringent site requirements, and incurs high upfront investment costs and significant maintenance challenges. However, in daily life and many specific fields, there are numerous low-wind-speed areas, such as urban residential areas, small mountain villages, remote islands, and areas surrounding some industrial plants. These locations often have low average annual wind speeds and very few periods of strong winds, making it difficult for conventional wind power equipment to operate efficiently in these environments.

[0004] Small-scale low-wind power generation technology targets this market gap. Compared to large-scale wind power, it has significant advantages. First, the miniaturization of the equipment makes transportation and installation extremely convenient. No large specialized equipment is required; assembly can be completed with ordinary manpower or small tools, allowing for flexible deployment in various confined and complex terrains. Second, it offers outstanding cost-effectiveness, reducing both equipment manufacturing and raw material costs, as well as installation, maintenance, and other operating costs, providing a viable energy solution for users with limited funds and small communities.

[0005] From a multi-purpose perspective, small-scale low-wind power generation can provide partial power support for households in the civilian sector, such as for lighting and operating small household appliances, alleviating electricity pressure; in agricultural production, it can power irrigation equipment and small agricultural processing machinery, contributing to the development of modern agriculture; in field operations, such as geological exploration and ecological monitoring stations, it can ensure basic power needs and maintain equipment operation; and in emergency rescue, it can serve as a temporary power source, which can be quickly set up to charge rescue equipment and lighting facilities, improving rescue efficiency.

[0006] Despite the promising prospects of small-scale low-wind power generation, it still faces some technical challenges, such as how to further improve wind energy capture efficiency under low-wind conditions, optimize the transmission system to reduce energy loss, and improve the stability and durability of power generation equipment. These problems need to be solved in order to promote the maturity of small-scale low-wind power generation technology and achieve wider application. Summary of the Invention

[0007] (a) Technical problems to be solved

[0008] To address the shortcomings of existing technologies, this invention provides a low-wind power generation system that solves the problems mentioned in the background section.

[0009] (II) Technical Solution

[0010] To achieve the above objectives, the present invention specifically adopts the following technical solution:

[0011] A low-wind power generation system includes two drive shafts, one of which is an inner drive shaft and the other is an outer drive shaft. A conical protrusion is fixedly connected to the inner drive shaft, and a fan blade is fixedly connected to the side of the conical protrusion. Two mounting discs are fixedly connected to the outer drive shaft, and three mounting brackets are fixedly connected around each mounting disc. Each mounting bracket has a matrix of unequal-sized perforated holes. A helical blade is fixedly connected to one end of each mounting bracket, and a helical plate is fixedly installed between two mounting brackets. A ball bearing is rotatably connected between the inner and outer rotating shafts. The center of gravity of the ball bearing is engaged in the outer rotating shaft, and a groove for engaging the ball bearing is provided in the outer rotating shaft. The inner rotating shaft has a transmission groove that engages and rotates with the outer surface of the ball bearing. A first rotor is fixedly connected to the bottom of the outer rotating shaft. A second rotor is fixedly connected to a point outside the outer rotating shaft through the inner rotating shaft. A stator is provided outside the first and second rotors. The stator is fixedly installed in the base. The inner rotating shaft is rotatably connected to the base for support via a thrust ball bearing.

[0012] Furthermore, the spiral blades are connected to two different mounting brackets, and three of them are provided in a staggered connection.

[0013] Furthermore, the spiral blade is an elongated object with an arc, a continuous curved shape, gradually curving from one end to the other, and also having a flat arc in the middle.

[0014] Furthermore, the spiral plate is a spiral shape, which is composed of multiple layers of arc-shaped structures intertwined with each other. The curvature and direction of each layer of arc are similar, and the whole presents a continuous, spiraling upward form.

[0015] Furthermore, the outer end faces of the first rotor on the outer rotating shaft and the second rotor outside the inner rotating shaft are flush.

[0016] Furthermore, the ball bearings are made of high-strength wear-resistant material with a surface smoothness of Ra0.2μm to ensure smooth engagement and rotation with the transmission groove and the slot, reduce friction loss, and extend service life.

[0017] Furthermore, the stator is composed of a high-permeability iron core and a multi-turn coil wound around it, which has good electrical conductivity and temperature resistance, and can efficiently convert the change in magnetic flux generated by the rotor rotation into electrical energy.

[0018] Furthermore, both the first and second rotors are made of permanent magnet materials to ensure that a sufficiently strong and stable magnetic field can be generated even in weak wind conditions, so as to achieve efficient power generation in conjunction with the stator.

[0019] (III) Beneficial Effects

[0020] Compared with the prior art, the present invention provides a low-wind power generation system, which has the following beneficial effects:

[0021] This invention, in wind energy capture, utilizes a synergistic structure of conical protrusions, fan blades, spiral blades, and spiral plates. Its unique design effectively addresses weak wind environments, increasing the contact area and effect with the airflow, significantly improving wind energy capture efficiency. Regarding the transmission system, the high-precision design of the ball bearings and the rational connection of the inner and outer shafts greatly reduce frictional losses, ensuring stable power transmission and minimizing energy loss. In power generation, the first and second rotors, made of permanent magnet materials, work in conjunction with a stator composed of a high-permeability iron core and multi-turn coils to generate a stable and strong magnetic field even in weak winds, efficiently converting mechanical energy into electrical energy and ensuring stable power generation. Furthermore, the system's overall structure is compact and miniaturized, facilitating transportation and installation. It can be flexibly deployed in various terrains, effectively alleviating voltage pressure in scenarios such as civilian lighting, agricultural production, field operations, and emergency rescue. It provides an efficient, convenient, and economical solution for energy utilization, making it highly valuable for application and promotion. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0023] Figure 2 This is a schematic diagram of the mounting disk, mounting bracket, and spiral blade mounting structure of the present invention;

[0024] Figure 3 This is a schematic diagram of the spiral blade structure of the present invention;

[0025] Figure 4 This is a schematic diagram of the internal structure of the base of the present invention;

[0026] Figure 5 For the present invention Figure 4 Schematic diagram of the structure at point A in the middle.

[0027] In the diagram: 1. Inner shaft; 2. Conical protrusion; 3. Fan blade; 4. Outer shaft; 5. Mounting plate; 6. Mounting bracket; 7. Spiral blade; 8. Spiral disc; 9. Ball bearing; 10. Slot; 11. Transmission slot; 12. First rotor; 13. Second rotor; 14. Stator; 15. Base. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] Example

[0030] like Figure 1-5 As shown, an embodiment of the present invention provides a low-wind power generation system, which includes two drive shafts, one of which is an inner rotating shaft 1 and the other is an outer rotating shaft 4.

[0031] The inner rotating shaft 1 passes through the outer rotating shaft 4 and extends to a certain position outside it. It is connected to the base 15 through a thrust ball bearing to achieve rotational support. Its surface is provided with a transmission groove 11, which is used to cooperate with the ball bearing 9 to achieve a specific transmission function.

[0032] As a key power transmission component within the system, the inner rotor 1 transmits the rotational mechanical energy converted from wind energy captured by the fan blades 3 to the second rotor 13. Simultaneously, through its coordinated rotation with the outer shaft 4, it ensures the stability of the entire system's power transmission. During rotation, the thrust ball bearing effectively bears the axial load, ensuring stable rotation of the inner shaft 1 and reducing the adverse effects of axial displacement on the system.

[0033] The conical protrusion 2 is fixed on the inner rotating shaft 1 and located on the side of the fan blade 3. It is conical in shape and has a specific geometric surface structure.

[0034] In low-wind conditions, the conical protrusion 2 can guide and converge the surrounding airflow. By changing the original direction of airflow, it makes the airflow impact the fan blade 3 more concentratedly, effectively increasing the wind force on the fan blade 3 locally, thereby improving the rotational efficiency of the fan blade 3 under low-wind conditions and enhancing the system's ability to capture wind energy.

[0035] The fan blade 3 is mounted on the inner rotating shaft 1 and located on the side of the conical protrusion 2. Its shape and size have been optimized to provide good aerodynamic performance.

[0036] Directly in contact with weak winds, it generates a rotational torque under the action of the wind, driving the inner shaft 1 to rotate, thus realizing the initial conversion of wind energy into mechanical energy. It is one of the core components of the entire power generation system for capturing wind energy. Its reasonable design ensures efficient response at low wind speeds, providing a power source for subsequent energy conversion.

[0037] The outer shaft 4 is fixedly connected to the bottom of the first rotor 12, and is engaged and rotated with the inner shaft 1 via ball bearings 9. Two mounting plates 5 are fixed externally for mounting other wind energy capture auxiliary structures.

[0038] On the one hand, together with the inner rotating shaft 1, it forms a double-layer rotating shaft structure, coordinating rotation to transmit power and enhancing the stability and reliability of the system. On the other hand, through its externally connected mounting plate 5 and related structures, it further captures wind energy, expands the system's utilization range of wind energy, and improves overall power generation efficiency. At the same time, it effectively transmits the power from the inner rotating shaft 1 to the first rotor 12, driving it to rotate and participate in the power generation process.

[0039] The mounting plate 5 is fixed on the outer rotating shaft 4 and has a disc-shaped structure. Three mounting brackets 6 are evenly distributed around the perimeter, providing a stable connection base for the mounting brackets 6.

[0040] As an intermediate connecting component, it ensures that the mounting bracket 6 and its spiral blades 7 and spiking plates 8 can be stably installed around the outer rotating shaft 4, ensuring that these wind energy capture structures maintain the correct position and angle under different wind speeds and directions, thereby effectively performing their function of capturing wind energy and maintaining the normal operation of the system.

[0041] Mounting brackets 6 are fixed around the mounting plate 5, with one end connected to a spiral blade 7. Spiral plates 8 are installed between two mounting brackets 6. The brackets have a matrix of unequal-sized perforated holes, featuring a unique structural strength and lightweight design.

[0042] By employing a matrix of unequal-sized perforated holes, the weight is effectively reduced while ensuring structural strength, thus lowering the overall rotational inertia of the system and enabling it to respond more sensitively to weak winds. Simultaneously, it provides reliable mounting positions for the spiral blades 7 and 8, allowing them to fully contact the airflow and transfer wind energy to the outer shaft 4, promoting the system's rotational power generation.

[0043] The spiral blade 7 is connected to two different mounting brackets 6. It is a long, curved object with a continuous curved shape. The curvature gradually changes from the middle to both ends, and the three spiral blades 7 are connected in a staggered manner.

[0044] In low-wind environments, its unique shape and staggered connection increase the contact area and duration with the airflow, effectively capturing airflows of different directions and speeds, and converting wind energy into power to drive the outer shaft 4. Compared to traditional blade designs, this is more conducive to improving wind energy utilization at low wind speeds and enhancing the system's power generation performance.

[0045] The spiral blade 8 is made of multiple layers of arc-shaped structures intertwined, presenting an overall spiral shape. It is fixedly installed between two mounting brackets 6 and has a certain pitch and thickness distribution.

[0046] When airflow passes through, the spiral structure of the spiral blade 8 guides the airflow along a specific path, allowing the airflow to continuously act on the spiral blade 8, generating a stable driving force and further improving the rotational efficiency of the outer shaft 4. Together with the spiral blade 7, it forms a multi-layered wind energy capture system, enhancing the system's energy conversion capability under weak wind conditions.

[0047] The ball bearing 9 is made of high-strength wear-resistant material with a surface smoothness of Ra0.2μm. Its center of gravity is engaged in the groove 10 of the outer rotating shaft 4, and its outer surface engages with the transmission groove 11 of the inner rotating shaft 1 for rotation.

[0048] It plays a crucial role in supporting and reducing friction between the inner and outer rotating shafts 4. This ensures smooth rotation between the inner and outer rotating shafts 1 and 4, reduces energy loss due to friction, and improves the system's transmission efficiency. Simultaneously, its high-precision manufacturing process and reasonable center of gravity design guarantee stability and reliability during long-term operation, extending the system's service life.

[0049] The slot 10 is located inside the outer rotating shaft 4 and precisely matches the center of gravity of the ball 9, having a specific geometric shape and dimensional accuracy.

[0050] In conjunction with the ball bearing 9, it provides a stable installation position and rotation constraint for the ball bearing 9, ensuring that the ball bearing 9 always maintains the correct position and movement trajectory during the rotation of the inner and outer rotating shafts 4, preventing the ball bearing 9 from shifting or falling off, and ensuring the smoothness and reliability of the system transmission.

[0051] The transmission groove 11 is located on the surface of the inner rotating shaft 1 and is adapted to the shape of the outer surface of the ball 9 to form a tight engaging rotational connection, with certain depth and width tolerance requirements.

[0052] As the transmission interface between the inner rotating shaft 1 and the ball bearing 9, the rotational motion of the inner rotating shaft 1 is transmitted to the outer rotating shaft 4 through the ball bearing 9, achieving efficient power transmission. Its reasonable design ensures stable and reliable transmission between the inner rotating shaft 1 and the ball bearing 9 under different working conditions, reducing energy loss and mechanical vibration.

[0053] The first rotor 12 is fixedly connected to the bottom of the outer shaft 4. It is made of permanent magnet material and its outer end face is flush with the outer end face of the second rotor 13. It has a specific magnetic pole distribution and magnetic field strength.

[0054] When the outer shaft 4 rotates in a weak wind, it rotates synchronously with the outer shaft 4. The stable magnetic field generated by the permanent magnet interacts with the stator 14, cutting the magnetic lines of force of the stator 14 coil and generating an induced electromotive force, thus realizing the conversion of mechanical energy into electrical energy. This is an important component of the power generation system. Its synergistic effect with the second rotor 13 enhances the effect of the magnetic field and improves the power generation efficiency.

[0055] The second rotor 13 is fixedly connected to the part of the inner rotating shaft 1 extending to the outer rotating shaft 4. It is also made of permanent magnet material, and its relative position to the first rotor 12 is fixed and its outer end face is flush with the first rotor 12. The magnetic poles are arranged in an orderly manner.

[0056] As the inner shaft 1 rotates, it forms a stable magnetic field environment around the stator 14 together with the first rotor 12. During rotation, electromagnetic induction occurs with the stator 14, converting the mechanical energy transmitted by the inner shaft 1 into electrical energy, increasing the power generation of the power generation system and improving the overall energy conversion efficiency of the system.

[0057] The stator 14 consists of a high-permeability iron core and a multi-turn coil wound around it, and is fixedly installed in the base 15, which has good electromagnetic performance and structural stability.

[0058] As a stationary component of the power generation system, the high permeability of its iron core enhances the magnetic field strength. When the first rotor 12 and the second rotor 13 rotate, the coils cut the magnetic lines of force to generate an induced current, thus efficiently converting the mechanical energy of the rotor into electrical energy. Its stable structure and excellent electromagnetic properties ensure the stability and continuity of the energy conversion.

[0059] The base 15 provides a stable support foundation for the entire power generation system. The stator 14 is installed inside and connected to the inner rotating shaft 1 through a thrust ball bearing, which has sufficient strength and stability.

[0060] The base 15 supports and secures the stator 14, ensuring its positional stability during system operation and providing reliable rotational support for the inner shaft 1, thus guaranteeing the structural integrity and operational stability of the entire power generation system. Simultaneously, the base 15's design effectively disperses vibrations and stresses generated during system operation, protecting system components from external interference and damage.

[0061] Analysis of the design features and functions of each structural component of the low-wind power generation system shows that the system effectively improves the wind energy capture efficiency and power conversion efficiency in low-wind environments through the coordinated operation of each component, and has good application prospects and practical value.

[0062] Under the influence of wind, the fan blades 3 on the inner shaft 1 and the spiral blades 7 and 8 on the outer shaft 4 begin to rotate. The inner shaft 1 and the outer shaft 4 achieve relative rotation through the cooperation of the ball bearings 9 in the slot 10 and the transmission groove 11, reducing friction. The first rotor 12 at the bottom of the outer shaft 4 and the second rotor 13 at the extension of the inner shaft 1 rotate accordingly. In the magnetic field generated by the stator 14, the rotor rotation induces a change in magnetic flux. According to the principle of electromagnetic induction, the coils in the stator 14 generate an induced electromotive force, thereby generating electricity. Throughout the process, the inner shaft 1 is stably supported in the base 15 by the thrust ball bearing, ensuring the normal operation of the system.

[0063] like Figure 2 As shown, in some embodiments, the spiral blades 7 are connected to two different mounting brackets 6, and three are arranged in a staggered connection; from the perspective of wind energy capture, three spiral blades 7 can increase the contact area and the point of action with the airflow. Under weak wind conditions, the airflow is relatively dispersed and the energy density is low. Multiple spiral blades 7 can capture the airflow at different spatial positions, which can make fuller use of the surrounding wind energy and improve energy collection efficiency compared to a single or fewer blades.

[0064] The staggered connection method creates an asymmetrical spatial layout for the helical blades 7. When airflow arrives, the force experienced by the helical blades 7 at different positions varies in time and magnitude. This difference causes the outer shaft 4 to generate a more continuous and stable torque. Traditional symmetrical blade layouts may experience force imbalance and rotational obstruction under certain wind directions and speeds, while the staggered connection effectively avoids this, enhancing the system's adaptability to changes in wind direction and speed, ensuring stable rotation of the outer shaft 4, and thus improving the power generation performance of the entire power generation system in complex, weak wind environments.

[0065] like Figure 2 As shown, in some embodiments, the spiral blade 7 is an elongated, curved object with a continuous, curved shape, gradually bending from one end to the other, and also having a flattened curvature in the middle. From an aerodynamic perspective, its unique curvature and bending shape can effectively change the flow characteristics of airflow on the blade surface. In weak wind conditions, the airflow speed is relatively low and unstable. This curved blade can guide the airflow to flow more smoothly along its surface, reducing airflow separation and turbulence compared to a straight blade. When airflow passes over the spiral blade 7, due to the curvature of the blade, a certain pressure difference is formed on the blade surface, thereby generating greater lift, driving the spiral blade 7 to rotate, and thus improving the efficiency of converting wind energy into mechanical energy.

[0066] From the perspective of structural strength and stability, the continuous bending shape gives the propeller blade 7 better structural rigidity. When facing wind forces of different directions and intensities, it can better disperse stress, reduce the risk of blade deformation or damage caused by wind impact, ensure stable operation in long-term weak wind environments, reduce system maintenance costs and downtime, and improve the reliability and durability of the entire power generation system.

[0067] like Figure 3As shown, in some embodiments, the spiral blade 8 has a spiral shape, which is composed of multiple layers of intertwined arc-shaped structures. The curvature and direction of each layer of arcs are similar, presenting an overall continuous, spiraling, and upward-reaching form. In terms of wind energy capture, the spiral shape allows the spiral blade 8 to utilize the energy of the airflow more effectively. When a weak wind passes through, its special shape guides the airflow along the spiral path, increasing the interaction time and contact area between the airflow and the spiral blade 8. Compared to planar or simple-shaped structures, this design can better capture the kinetic energy of weak airflows and convert it into mechanical energy that drives the outer rotating shaft 4 to rotate, thereby improving the system's wind energy utilization efficiency at low wind speeds.

[0068] From the perspective of structural stability and mechanical performance, the intertwined multi-layered arc-shaped structure forms a robust overall framework. When facing complex wind environments, it can disperse the wind load it bears, enhancing its wind resistance. The similar curvature and orientation of each layer ensure uniform stress distribution, avoiding localized stress concentration. This makes the spiral blades 8 less prone to damage during long-term operation, ensuring system stability and reliability. It also reduces problems such as power generation interruptions or efficiency reductions due to component failures, contributing to improved performance and lifespan of the entire low-wind power generation system.

[0069] like Figure 4 As shown, in some embodiments, the outer end faces of the first rotor 12 on the outer shaft 4 and the second rotor 13 outside the inner shaft 1 are flush. From the perspective of magnetic field distribution, flush end faces ensure that the magnetic fields generated by the two rotors are more uniformly and stably distributed in space during rotation. During power generation, the interaction between a stable and uniform magnetic field and the stator 14 is one of the key factors for achieving efficient power conversion. If the rotor end faces are not flush, it may lead to uneven local magnetic field strength, affecting the cutting effect of magnetic lines of force and thus reducing power generation efficiency.

[0070] Regarding the coordination of the mechanical structure, the flush design facilitates the smooth operation of the system. When the inner shaft 1 and the outer shaft 4 rotate under wind power, the two rotors can work in a coordinated manner with the stator 14, reducing vibration and unbalanced forces caused by rotor position differences. This stability reduces wear on system components, extends equipment lifespan, and also helps improve the reliability of the entire power generation system, ensuring continuous and stable power generation even in low-wind environments.

[0071] like Figure 5As shown, in some embodiments, the ball bearing 9 is made of high-strength wear-resistant material with a surface smoothness of Ra0.2μm to ensure smooth engagement and rotation with the transmission groove 11 and the retaining groove 10, reducing frictional loss and extending service life. In terms of transmission performance, the high-strength wear-resistant material ensures that the ball bearing 9 is not easily deformed or worn when subjected to the pressure and friction generated by the rotation of the inner and outer shafts 4 over a long period. This allows the ball bearing 9 to maintain a good geometric shape, ensuring a tight and stable fit with the transmission groove 11 and the retaining groove 10, maintaining a stable transmission relationship, effectively transmitting torque, ensuring coordinated rotation between the inner shaft 1 and the outer shaft 4, ensuring smooth mechanical energy transmission of the system, and thus maintaining the stable operation of the power generation system.

[0072] From an energy loss perspective, the high smoothness of the Ra0.2μm surface significantly reduces the coefficient of friction between the ball bearing 9 and the transmission groove 11 and the retaining groove 10. During system operation, friction loss is greatly reduced, allowing more wind energy to be effectively converted into mechanical energy, improving the overall energy conversion efficiency of the system, avoiding energy waste and component performance degradation caused by frictional heat generation, extending the service life of the ball bearing 9 and the entire transmission system, reducing equipment maintenance costs and replacement frequency, and enhancing the economy and practicality of the low-wind power generation system.

[0073] like Figure 4 As shown, in some embodiments, the stator 14 consists of a high-permeability iron core and multiple turns of coil wound around it, possessing good electrical conductivity and temperature resistance, and can efficiently convert the magnetic flux changes generated by rotor rotation into electrical energy; the high-permeability iron core can effectively enhance the magnetic field strength. When the rotor rotates, the surrounding magnetic field becomes more concentrated and stable due to the effect of the iron core, causing magnetic lines of force to pass through the coil more densely. The multiple turns of coil increase the opportunity for magnetic lines of force to cut, and according to the principle of electromagnetic induction, more changes in magnetic flux can be converted into induced electromotive force. This structural design greatly improves the energy conversion efficiency and makes full use of the mechanical energy of rotor rotation.

[0074] Excellent conductivity ensures smooth output of induced current, reducing power transmission losses. Under weak wind power generation conditions, the system continuously generates heat during operation. The temperature resistance allows stator 14 to operate stably, avoiding the impact of temperature rise on electromagnetic performance and material properties. This ensures the reliability and continuity of the power conversion process, maintains stable operation of the power generation system, and improves the power generation efficiency of the entire system in weak wind environments.

[0075] like Figure 4As shown, in some embodiments, both the first rotor 12 and the second rotor 13 are made of permanent magnet material to ensure that a sufficiently strong and stable magnetic field can be generated even in weak wind conditions, working in conjunction with the stator 14 to achieve efficient power generation. The permanent magnet material itself has stable magnetism, eliminating the need for continuous external power supply to excite the magnetic field. Even in weak wind conditions with low wind speeds and limited energy input, it can still stably generate a sufficiently strong magnetic field. Compared to rotors that require additional excitation devices, this reduces system complexity and energy loss.

[0076] When the rotor rotates under wind power, its stable magnetic field interacts with the coils of stator 14. This stable magnetic field ensures that the process of magnetic lines cutting through the coils is continuous and regular under varying wind speeds, maintaining a stable induced electromotive force and thus achieving efficient energy conversion. This is particularly crucial for low-wind power generation systems, as low winds inherently have low energy density. Only by ensuring the stability and strength of the magnetic field can limited wind energy resources be fully utilized, power generation efficiency improved, and the system's practicality and reliability enhanced under low wind speed conditions. This provides strong support for applications in low-wind areas such as urban residential areas and small mountain villages.

[0077] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A low-wind power generation system, comprising two drive shafts, characterized in that: One of the drive shafts is an inner shaft (1), and the other is an outer shaft (4). A conical protrusion (2) is fixedly connected to the inner shaft (1), and a fan blade (3) is fixedly connected to the side of the conical protrusion (2) on the inner shaft (1). Two mounting discs (5) are fixedly connected to the outer shaft (4), and three mounting brackets (6) are fixedly connected around the mounting discs (5). The mounting brackets (6) have matrix perforated holes of unequal size. A spiral blade (7) is fixedly connected to one end of each mounting bracket (6), and a spiral plate (8) is fixedly installed between the two mounting brackets (6). The inner shaft (1) and the outer shaft (4) are engaged and rotatably connected by a... The ball (9) is engaged in the outer rotating shaft (4), and the outer rotating shaft (4) is provided with a groove (10) for engaging position. The inner rotating shaft (1) is provided with a transmission groove (11) that engages and rotates with the outer surface of the ball (9). The bottom of the outer rotating shaft (4) is fixedly connected to the first rotor (12). The inner rotating shaft (1) extends through to a point outside the outer rotating shaft (4) and is fixedly connected to the second rotor (13). The first rotor (12) and the second rotor (13) are provided with a stator (14). The stator (14) is fixedly installed in the base (15). The inner rotating shaft (1) is rotatably connected to the base (15) for support through a thrust ball bearing. The spiral blade (7) is connected to two different mounting brackets (6), and there are three of them, which are staggered. The spiral plate (8) is a spiral shape, which is formed by multiple layers of arc-shaped structures intertwined with each other.

2. The low-wind power generation system according to claim 1, characterized in that: The spiral blade (7) is a long, curved object with a continuous curved shape, gradually curving from one end to the other, and also having a flat arc in the middle.

3. A low-wind power generation system according to claim 1, characterized in that: The spiral plates (8) have similar curvature and direction of each layer, presenting a continuous, spiraling upward shape as a whole.

4. A low-wind power generation system according to claim 1, characterized in that: The outer end faces of the first rotor (12) on the outer rotating shaft (4) and the second rotor (13) outside the inner rotating shaft (1) are flush.

5. A low-wind power generation system according to claim 1, characterized in that: The ball (9) is made of high-strength wear-resistant material with a surface smoothness of Ra0.2μm to ensure smooth engagement and rotation with the transmission groove (11) and the slot (10), reduce friction loss and extend service life.

6. A low-wind power generation system according to claim 1, characterized in that: The stator (14) consists of a high-permeability iron core and multiple turns of coil wound around it. It has good electrical conductivity and temperature resistance, and can efficiently convert the change in magnetic flux generated by the rotor rotation into electrical energy.

7. A low-wind power generation system according to claim 1, characterized in that: Both the first rotor (12) and the second rotor (13) are made of permanent magnet material to ensure that a sufficiently strong and stable magnetic field can be generated even in a weak wind environment, and to achieve efficient power generation in conjunction with the stator (14).

Images