Ultra-low flow velocity tidal current energy generator set

Abstract

The invention belongs to the technical field of generator sets, and particularly discloses an ultralow-flow-velocity tidal current energy generator set, which comprises a first rotor, a second rotor, a third rotor, a fourth rotor and a fifth rotor, the first rotor is sequentially provided with a plurality of electromagnets along the axis direction of the first rotor, and each electromagnet is independently electrically connected with the outside through an excitation mechanism; the first rotor is rotationally mounted in the shell, and a first driving blade extending to the outside of the shell is arranged on the first rotor; the second rotor extends in the axis direction, and the second rotor is arranged between the first rotor and the shell in the circumferential direction; the second rotor comprises a plurality of electromagnetic coils arranged in the axis direction, and the electromagnetic coils correspond to the electromagnets in the radial direction of the first rotor. The second rotor is provided with a second driving blade extending to the outside of the shell; the device has the advantages that the power generation efficiency is enhanced through the reversely rotating double rotors and the spiral blades, the number of the electromagnets can be dynamically adjusted to adapt to different water flows, and the maintenance cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of generator sets, and in particular to an ultra-low flow velocity tidal current energy generator set. Background Art

[0002] Existing tidal power generation technologies mostly use fan blade structures similar to wind power generation. These fan blades generate mechanical energy through the propulsion of fluid (wind or water) and convert it into electrical energy. When faced with greater fluid kinetic energy requirements, it is usually necessary to increase the diameter of the fan blades and expand their radial area to capture more energy. However, this design has significant limitations in low-speed water flow environments, especially in tidal power generation scenarios in offshore areas.

[0003] First, as the diameter of the fan blades increases, the size and structure of the generator set become very large, increasing the manufacturing, transportation and installation costs of the equipment. In addition, the large radial structure encounters greater resistance when running in water, reducing the operating efficiency of the system. In a low-speed water flow environment, this fan blade structure cannot fully utilize the kinetic energy in the water flow, resulting in low power generation efficiency and difficulty in effectively converting low-speed water flow into electrical energy.

[0004] Secondly, the existing technology is not flexible enough to adapt to different water flow speeds. Due to the frequent changes in tidal energy, the water flow speed varies significantly in different time periods and regions. The existing fan blade structure design works well under high-speed water flow, but cannot function effectively in low-speed water flow, and may even fail to start the generator set. Existing power generation equipment is difficult to fully adapt to and utilize the energy of low-speed water flow, which limits the development and utilization of tidal energy in the offshore field.

[0005] Therefore, the existing tidal energy generation technology faces the following major technical problems: 1. The generator set is large in structure and is not suitable for low-speed water flow environments, which increases costs and maintenance difficulties; 2. The generator structure design has poor adaptability to water flow speed, especially in low-speed water flow, and cannot effectively capture energy; 3. Current generators have difficulty in achieving efficient tidal energy conversion, especially in low-speed water flow.

[0006] Therefore, an ultra-low flow rate tidal current energy generator set is proposed to solve the above-mentioned problems. Summary of the invention

[0007] The present invention aims to provide an ultra-low flow velocity tidal current energy generator set to solve or improve at least one of the above-mentioned technical problems.

[0008] In view of this, a first aspect of the present invention is to provide an ultra-low flow velocity tidal energy generator set.

[0009] The first aspect of the present invention provides an ultra-low flow rate tidal energy generator set, comprising: a first rotor, on which a plurality of electromagnets are arranged in sequence along the axial direction, each of the electromagnets being electrically connected to the outside through an excitation mechanism; the first rotor is rotatably mounted inside a shell, and the first rotor is provided with a first drive blade extending to the outside of the shell; a second rotor extends along the axial direction, and the second rotor is circumferentially arranged between the first rotor and the shell; the second rotor comprises a plurality of electromagnetic coils arranged along the axial direction, and the electromagnetic coils correspond to the electromagnets along the radial direction of the first rotor; the second rotor is provided with a second drive blade extending to the outside of the shell; wherein the first drive blade and the second drive blade both extend spirally with the axial direction as the axis, and the spiral directions of the first drive blade and the second drive blade are opposite, so that the rotation directions of the first rotor and the second rotor are opposite; the starting number of the electromagnet at each moment is set according to the relative speed between the first rotor and the second rotor.

[0010] In any of the above technical solutions, the shell is a hollow tube, and sealing plugs are rotatably installed at both ends through sealing rings, and the sealing plugs are suspended in water through slings; one of the sealing rings is fixedly connected to the first rotor.

[0011] In any of the above technical solutions, multiple first drive blades and second drive blades are arranged in the circumferential direction; the projection of the first drive blade along the axial direction is a closed first ring body, and the ratio of the outer radius of the first ring body and the length of the first drive blade along the axial direction is: 1 / 4~1 / 2.5; the projection of the second drive blade along the axial direction is a closed second ring body, and the ratio of the outer radius of the second ring body and the length of the second drive blade along the axial direction is: 1 / 15~1 / 10.

[0012] In any of the above technical solutions, an annular mixing flow cavity is formed between the outer diameter of the first ring body and the inner diameter of the second ring body.

[0013] In any of the above technical solutions, the ends of all the second drive blades along the axial direction are fixedly assembled by connecting rings; one of the connecting rings is connected to the sealing ring through a connecting rod, and an inlet port for water flow is formed between the other connecting ring and the shell, and the inlet port is connected to the mixing chamber along the axial direction.

[0014] In any of the above technical solutions, the two slings can move relative to each other, driving the first rotor and the second rotor to swing, so that the axis direction is the same as the water flow direction.

[0015] In any of the above technical solutions, the electromagnetic coil is fixed to the inner wall of the shell, and the second driving blade is fixed to the outer wall of the shell; the second driving blade drives the shell to rotate, thereby driving all the electromagnetic coils to rotate simultaneously.

[0016] In any of the above technical solutions, along the radial direction, a first annular gap is formed between the electromagnet and the electromagnetic coil for the excitation mechanism to pass through, and the excitation mechanism changes the torque required for the first driving blade to drive the electromagnet by adjusting the number of times the electromagnet is opened along the axial direction.

[0017] In any of the above technical solutions, a first sensor for obtaining the water flow velocity is installed on the sealing plug, and a second sensor for obtaining the relative speed is provided on the first rotor and the second rotor; the excitation mechanism adjusts the number of electromagnets opened according to the water flow velocity and the relative speed.

[0018] In any of the above technical solutions, along the axial direction, a second annular gap for spacing adjacent electromagnets is formed between adjacent electromagnetic coils.

[0019] Compared with the prior art, the present invention has the following beneficial effects: By providing the first rotor and the second rotor that rotate relative to each other, and the spiral drive blades in opposite directions, the speed of relative movement is increased, thereby improving the cutting speed of the magnetic flux lines and the power generation efficiency. This design is particularly suitable for low-speed water flow conditions and can effectively increase the power generation.

[0020] The excitation mechanism can dynamically adjust the number of electromagnets started according to the relative speed between the rotors. This adjustment capability allows the generator set to flexibly respond to different water flow speeds and operating conditions, optimize power generation performance and reduce energy waste.

[0021] Since the first driving blade and the second driving blade extend spirally along the axis and in opposite directions, this design can evenly distribute the force brought by the water flow, reduce the mechanical stress caused by inconsistent water flow direction and improve the driving effect of the water flow. At the same time, this also reduces the wear of the rotor, prolongs the service life of the equipment, and reduces maintenance costs.

[0022] Additional aspects and advantages of embodiments according to the present invention will become apparent in the following description or may be learned through practice of embodiments according to the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which: Figure 1It is a structural schematic diagram of the present invention; Figure 2 A side view of the first ring body and the second ring body of the present invention; Figure 3 It is a schematic diagram of a partial cutaway of the housing and its connection structure of the present invention; Figure 4 for Figure 3 Enlarged view of point A in the middle.

[0024] in, Figure 1-Figure 4 The corresponding relationship between the reference numerals and the component names is as follows: 1 electromagnet, 2 first drive blade, 201 first ring body, 3 shell, 4 electromagnetic coil, 5 second drive blade, 501 second ring body, 6 sealing ring, 7 sealing plug, 8 sling, 9 mixed flow chamber, 10 connecting ring, 11 connecting rod, 12 introduction port, 13 rotating shaft, 14 collector ring, 15 brush, 16 conductive wire. DETAILED DESCRIPTION

[0025] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0026] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0027] See also Figure 1-Figure 4 , an ultra-low flow rate tidal energy generator set according to some embodiments of the present invention is described below.

[0028] The embodiment of the first aspect of the present invention provides an ultra-low flow rate tidal current energy generator set. In some embodiments of the present invention, such as Figure 1-Figure 4 As shown, the ultra-low flow rate tidal current energy generator set comprises: The first rotor has a plurality of electromagnets 1 arranged in sequence along its axial direction, each electromagnet 1 is electrically connected to the outside through an excitation mechanism, and a magnetic field can be generated by energizing the electromagnet 1 so as to generate electricity through electromagnetic induction; the first rotor is rotatably installed inside the shell 3, and the first rotor is provided with a first driving blade 2 extending to the outside of the shell 3, and the first driving blade 2 can be driven by water flow to rotate the first rotor and the electromagnet 1 so as to perform magnetic flux line cutting motion.

[0029] The second rotor extends along the axial direction and is circumferentially arranged between the first rotor and the shell 3. The second rotor can circumferentially surround the outside of the first rotor and the electromagnet 1; the second rotor includes a plurality of electromagnetic coils 4 arranged along the axial direction, and the electromagnetic coils 4 correspond to the electromagnet 1 along the radial direction of the first rotor, so that after the electromagnet 1 is energized to generate a magnetic field, the electromagnetic coils 4 can cut the magnetic flux lines to generate current; the second rotor is provided with second driving blades 5 extending to the outside of the shell 3, and similarly, the electromagnetic coils 4 of the second rotor can be driven to rotate by the water flow through the second driving blades 5, so that the first rotor and the second rotor can be driven to rotate at the same time in the low-speed water flow, thereby increasing the relative rotation speed and generating more electricity per unit time.

[0030] Among them, the first driving blade 2 and the second driving blade 5 are both spirally extended with the axial direction as the axis. The spirally extended blades can better bear force in one direction in low-speed water flow, and the axial size is increased while avoiding excessive radial size. The spiral directions of the first driving blade 2 and the second driving blade are opposite, so that the rotation directions of the first rotor and the second rotor are opposite. By reversing the first rotor and the second rotor, the electromagnet 1 and the electromagnetic coil 4 rotate in opposite directions, so that a greater relative rotation speed can be generated in low-flow water; The number of electromagnets 1 started at each moment is set according to the relative rotational speed between the first rotor and the second rotor. Since multiple electromagnets 1 are arranged along the axial direction, the number of electromagnets 1 that are turned on should be reduced when the water flow is too low, so as to reduce the torque and water flow speed required to rotate the first rotor and the second rotor, so as to better adapt to different water flow speeds, especially low flow speeds.

[0031] The present invention provides an ultra-low flow rate tidal energy generator set, wherein the first rotor is the core component of the generator, and a plurality of electromagnets 1 are arranged on the first rotor along the axial direction. Its main function is to generate rotational motion through the water flow, and convert the external kinetic energy of water into mechanical energy. The rotation of the rotor drives the electromagnet 1 to move, so that the magnetic field of the electromagnet 1 and the stator coil produce relative motion, complete electromagnetic induction and generate electrical energy. The size and weight of the first rotor are optimized by design to ensure that it can rotate smoothly in a low-speed water flow environment, thereby generating electricity efficiently. A plurality of electromagnets 1 are arranged on the first rotor respectively, and are individually connected to an external power supply through an excitation mechanism. When the electromagnet 1 is energized, a strong magnetic field is generated. The main function of these electromagnets 1 is to cut the magnetic flux lines through relative motion with the stator coil to generate an induced electromotive force. Through the independent power supply design of the electromagnet 1, the magnetic field strength can be adjusted according to the water flow speed, ensuring that the generator set always maintains a stable output under different water flow conditions. The excitation mechanism is responsible for providing an excitation current to the electromagnet 1 and adjusting the magnetic field strength of each electromagnet 1. Its main function is to control the strength of the magnetic field by changing the excitation current of the electromagnet 1, thereby achieving control of the generating voltage. The excitation mechanism can automatically adjust the magnetic field of the electromagnet 1 according to the real-time water flow speed to ensure that the generator set can maintain sufficient power generation efficiency even in low-speed water flow. The shell 3 provides structural protection for the entire generator set and helps guide the water flow to flow smoothly through the blade area to reduce water flow resistance. A fixed structure supporting the rotor is set in the shell 3 to ensure that the rotor can rotate stably and smoothly. The design of the shell 3 not only enhances the durability of the generator set, but also improves the utilization efficiency of the water flow by optimizing the water flow path. The first driving blade 2 is arranged outside the first rotor, and part of the blade extends outside the shell 3. The blade is driven to rotate by the impact of the water flow, thereby driving the rotor to rotate. The shape and size of the blade are optimized, and the water flow can drive the blade to obtain sufficient rotational force even in a low-speed water flow environment. The design of the blade ensures that the generator set can achieve efficient startup and operation under various water flow conditions, especially the performance in low-speed water flow. When the first rotor rotates under the impetus of the water flow, the magnetic field generated by the electromagnet 1 moves relative to the stator coil, cutting the magnetic flux lines. The cutting of the magnetic flux lines generates an electromotive force in the coil. The strength of this electromotive force is directly related to the speed of the rotor and the magnetic field strength of the electromagnet 1. The cutting motion of the magnetic flux lines is the core process of the generator converting mechanical energy into electrical energy.

[0032] When the water flow pushes the first driving blade 2, the rotor starts to rotate, driving the multiple electromagnets 1 arranged along the axis to move. When the electromagnet 1 rotates, its magnetic field cuts the magnetic flux lines in the stator coil to generate an electromotive force. Since the electromagnet 1 is independently powered by the excitation mechanism, the rotation of the rotor and the cutting of the magnetic field of the electromagnet 1 work together to complete the energy conversion. When the water flow speed is low, the rotor speed is slow, and the excitation mechanism increases the excitation current of the electromagnet 1 to enhance the magnetic field to ensure that the electromotive force in the stator is strong enough to maintain power generation. The excitation mechanism adjusts the strength of the magnetic field by controlling the excitation current of the electromagnet 1. Each electromagnet 1 adjusts the magnetic field strength in real time according to the change of the water flow speed through independent excitation control. For example, when the water flow speed is high, the excitation mechanism can reduce the excitation current to prevent the magnetic field from being too strong and affecting the power generation efficiency; while under low-speed water flow, the excitation mechanism can increase the current to enhance the magnetic field strength. When the water flow speed is only 1.5 m / s, the excitation mechanism automatically increases the excitation current of the electromagnet 1 to ensure that the magnetic field generated by the electromagnet 1 is still strong enough to maintain normal power generation even in low-speed water flow. The design of the shell 3 ensures that the water flow can flow smoothly through the blade area and reduce the resistance of the water flow to the blades and the rotor. At the same time, the protective effect of the shell 3 on the internal components avoids the direct impact of the water flow and the external environment on the generator set. The drive blades extend to the outside of the shell 3 so that they can directly contact the water flow and use the kinetic energy of the water flow to drive the blades to rotate. Under low-speed water flow conditions (2 m / s), the water flow guiding structure in the shell 3 reduces the water flow resistance and ensures that the drive blades can obtain sufficient thrust to smoothly drive the rotor to rotate. The design of the drive blades can maximize the use of water flow to drive the rotor to rotate. Even in a low-speed water flow environment, the water flow can smoothly drive the blades to rotate. This design optimizes the shape and size of the blades to adapt to different water flow conditions, especially the use of low-speed water flow. In a low-speed water flow environment (such as 1.8 m / s), the blades can still obtain enough kinetic energy with the help of the water flow to drive the rotor to rotate, thereby ensuring that the generator can operate stably under low-speed conditions. When the electromagnet 1 rotates with the rotor, the magnetic field generated continuously cuts the magnetic flux lines in the stator. This process is the core of power generation. In a low-speed water flow, the rotor speed may be low, but by increasing the magnetic field strength of the electromagnet 1, the lack of speed can be compensated to ensure that the electromotive force induced in the stator is strong enough. When the water flow speed is 2 m / s, the speed is slow, and the magnetic field strength is increased through the excitation current, so that the induced current in the stator is maintained at a high level, achieving stable power generation.

[0033] The second rotor is arranged between the first rotor and the housing 3, extending along the axial direction, and can be circumferentially surrounded by the outside of the first rotor and the electromagnet 1. Its main function is to rotate simultaneously with the first rotor through the promotion of water flow, thereby increasing the relative speed of magnetic flux lines cutting and improving power generation efficiency. A plurality of electromagnetic coils 4 are arranged on the second rotor, and these electromagnetic coils 4 move relative to the magnetic field generated by the electromagnet 1 on the first rotor when the second rotor rotates, generating electromotive force. The design of the second rotor ensures that the generator set can effectively improve the energy utilization rate in a low-speed water flow environment. The electromagnetic coils 4 are arranged along the axial direction of the second rotor and are located outside the electromagnet 1 of the first rotor. Each electromagnetic coil 4 is arranged radially relative to the corresponding electromagnet 1. When the electromagnet 1 on the first rotor generates a magnetic field, the electromagnetic coil 4 of the second rotor rotates with the promotion of water flow, and the relative movement between the magnetic field and the coil cuts the magnetic flux lines, thereby inducing current in the electromagnetic coil 4. The number and position of the electromagnetic coils 4 are optimized by design to ensure that they can efficiently capture electromagnetic induction energy. The second drive blades 5 are arranged outside the second rotor, and some of the blades extend outside the housing 3. Its main function is to use the water flow to drive the second rotor to rotate, thereby driving the electromagnetic coil 4 to move. The shape and position of the drive blades are optimized to ensure that in a low-speed water flow environment, the water flow can still provide sufficient kinetic energy to enable the second rotor to rotate smoothly. The presence of the second drive blade 5 enhances the system's responsiveness under low-speed water flow conditions and improves the overall power generation efficiency. By introducing the second rotor, the generator set can achieve the effect of two sets of rotors rotating simultaneously in a low-speed water flow environment, increasing the relative rotation speed. This design increases the frequency of magnetic flux cutting, thereby generating more electricity per unit time. The synchronous operation of the first rotor and the second rotor allows the energy in the low-speed water flow to be more fully converted into electrical energy.

[0034] The first rotor and the second rotor run in parallel with the same axis, and the electromagnetic coil 4 of the second rotor surrounds the outside of the electromagnet 1 of the first rotor. When the water flow drives the two rotors to rotate simultaneously, the magnetic field generated by the electromagnet 1 of the first rotor interacts with the electromagnetic coil 4 of the second rotor, cutting the magnetic flux lines to generate electromotive force. Since the two rotors are driven by the water flow respectively, the relative speed of rotation increases. Even in low-speed water flow, this design can greatly improve the efficiency of generating electromotive force. Detailed example: In an environment with a slow water flow speed (such as 1.8 m / s), the first rotor and the second rotor rotate simultaneously, and the relative speed is increased by about 1.5 times that of the single rotor system, and the power generation efficiency is significantly improved. The electromagnet 1 and the electromagnetic coil 4 are arranged on the first rotor and the second rotor respectively, and their relative movement is the key to generating electromotive force. When the electromagnet 1 is energized, the magnetic field is formed. As the rotor rotates, the magnetic field and the electromagnetic coil 4 move relative to each other, generating current. Since the electromagnetic coil 4 is located outside the electromagnet 1 and rotates at a fast speed, the frequency of magnetic flux line cutting is greatly improved. In a low-speed water flow environment, when the first rotor and the second rotor rotate at a relatively low speed at the same time, the electromagnetic coil 4 of the second rotor can still cut the magnetic flux lines at a high frequency, ensuring that the system can output a stable current. The second drive blade 5 is similar to the first drive blade 2, and can use the kinetic energy of the water flow to drive the second rotor to rotate. This design enables the water flow to provide sufficient kinetic energy to drive the second rotor even in a water flow environment with a relatively low flow rate. Since the second drive blade 5 extends to the outside of the housing 3, the water flow can act more directly on the blade surface to drive the rotor to rotate. When the water flow speed is 2 m / s, the second drive blade 5 rotates the second rotor through the thrust of the water flow, so that the generator set can still maintain efficient operation at a relatively low water flow speed. The first drive blade 2 and the second drive blade 5 respectively drive the first rotor and the second rotor to rotate, forming a relative motion. This dual-rotor design increases the frequency of cutting the magnetic flux lines and improves the efficiency of generating electromotive force. When the water flow speed is low, the first drive blade 2 drives the first rotor, and the second drive blade 5 drives the second rotor at the same time. The coordinated rotation of the dual rotors provides higher power generation efficiency in the low-speed water flow environment, and the relative speed of cutting the magnetic flux lines is increased by more than 50% compared with the single rotor system. By driving the first rotor and the second rotor to rotate at the same time, the system's magnetic flux line cutting frequency per unit time is significantly increased. This design is particularly suitable for low-speed water flow environments. By increasing the relative rotation speed, the power generation capacity of the generator set is effectively improved. When the water flow speed is 2 m / s, the traditional single-rotor generator set may not be able to generate electricity effectively, but the dual-rotor design increases the frequency of magnetic flux line cutting through relative motion, so that the generator set can still generate considerable electricity.

[0035] The first driving blade 2 extends spirally along the axial direction, and its main function is to drive the blade to rotate through the water flow, thereby driving the first rotor to rotate. The spiral extension design enables the blade to be more effectively stressed in a low-speed water flow environment, thereby ensuring that the water flow continuously acts on the blade in one direction to drive it to rotate. The spiral blade design not only increases the axial force area, but also optimizes the size and shape of the blade without increasing the radial dimension, effectively improving the utilization efficiency of the water flow energy. The second driving blade 5 also extends spirally in the axial direction, but its spiral direction is opposite to that of the first driving blade 2. Its main function is to drive the second rotor to rotate through the water flow, and drive the electromagnetic coil 4 on the second rotor to rotate relative to the electromagnet 1 of the first rotor. The spiral extension design makes it easier for the blade to maintain a stable rotational force in a low-speed water flow, ensuring that the second rotor can continue to rotate and increase the frequency of cutting magnetic flux lines. The spiral extension blade design is more advantageous in a low-speed water flow environment and can make full use of the kinetic energy of the water flow. Compared with the traditional fan blade structure, the spiral blade design avoids the problem of excessive radial dimension and enhances the water flow thrust by increasing the axial dimension. The curved design of the spiral blade allows the water flow to continuously act on the blade surface, providing uniform thrust, preventing fluid separation, and thus improving the rotation efficiency of the blade. The spiral directions of the first drive blade 2 and the second drive blade 5 are opposite, and this design makes the two rotors rotate in opposite directions. By allowing the first rotor and the second rotor to rotate in opposite directions, the relative movement speed of the electromagnet 1 and the electromagnetic coil 4 can be significantly increased, thereby increasing the frequency of magnetic flux cutting. This reverse rotation design enables the generator set to still generate higher power in a low-speed water flow environment. By allowing the first rotor and the second rotor to rotate in opposite directions, the relative rotation speed of the electromagnet 1 and the electromagnetic coil 4 is significantly increased. This means that even in a low-speed water flow, due to the relative rotation of the two rotors, the cutting speed of the magnetic flux lines is increased, and the power generation efficiency is greatly improved. The reverse rotation design maximizes the use of kinetic energy in the low-speed water flow, thereby improving the overall efficiency of the generator set under low flow conditions.

[0036] The first driving blade 2 can be more effectively stressed under the push of water flow and push the first rotor to rotate through the design of spiral extension. The spiral structure not only increases the axial force area of ​​the blade, but also due to the spiral curve design, the water flow can continuously and evenly act on the blade surface, thereby improving the rotation efficiency of the blade. When the water flow speed is low, the spiral design enables the water flow to generate continuous and uniform thrust on the blade, avoiding the problem of insufficient thrust of traditional fan blades under low-speed water flow, thereby ensuring that the first rotor can maintain stable rotation. The spiral direction of the second driving blade 5 is opposite to that of the first driving blade 2. When the water flow pushes it to rotate, the second rotor rotates in the opposite direction to the first rotor. This design makes the rotation directions of the two rotors opposite, increasing the relative motion speed. Under the condition of a water flow speed of 1.5 m / s, the spiral blade design ensures that the thrust of the water flow can push the second rotor to rotate. Although the water flow speed is low, due to the spiral design, the blade can still obtain sufficient thrust in the water flow to drive the rotor to rotate. The spiral directions of the first driving blade 2 and the second driving blade 5 are opposite, so that the first rotor and the second rotor rotate in opposite directions respectively. Such a design greatly increases the relative speed between the electromagnet 1 and the electromagnetic coil 4, thereby improving the power generation efficiency. When the water flow speed is 2 m / s, the first rotor and the second rotor rotate in opposite directions to increase the relative cutting speed by 1.5 times, greatly increasing the cutting frequency of the magnetic flux lines, thereby improving the power generation capacity of the system. The design of the spiral blade not only avoids the problem of excessive radial size, but also increases the force area of ​​the blade by extending the axial size. This design enables the generator set to effectively capture kinetic energy in low-speed water flow and maintain a high rotation efficiency. In traditional tidal energy power generation systems, the increase in the radial size of the blade often leads to a large structure that is not suitable for low-speed water flow environments, while the spiral extended blade design effectively improves the force efficiency of the blade by increasing the axial size, and can still stably drive the rotor in a low-speed water flow of 2 m / s. The reverse rotation of the first rotor and the second rotor increases the relative rotation speed of the electromagnet 1 and the electromagnetic coil 4, thereby increasing the frequency of magnetic flux line cutting. Through reverse rotation, the system can achieve higher power generation efficiency than unidirectional rotation under low-speed water flow conditions. At a water flow rate of 1.8 m / s, a traditional single-rotor system may not be able to generate electricity effectively. However, through the counter-rotation design, the relative speed of the two rotors is increased by more than 50%. Even at a lower water flow rate, the power generation system can still maintain efficient power output.

[0037] The electromagnets 1 are arranged along the axial direction of the first rotor, and the number of electromagnets 1 started can be dynamically controlled according to the real-time water flow speed and relative speed. When the water flow is low, by reducing the number of electromagnets 1 turned on, the starting torque required by the system is reduced, so that the first rotor and the second rotor can also start and maintain stable rotation at a lower water flow speed. This dynamic control mechanism ensures that the system can flexibly adapt to different water flow speeds, especially low-speed water flow conditions. When the water flow speed is low, reducing the number of electromagnets 1 started can effectively reduce the load of the water flow drive system and reduce the mechanical resistance required to rotate the first rotor and the second rotor. In this way, the normal operation of the system can be maintained under low water flow conditions, and the problem of the generator set failing to start due to excessive starting torque can be prevented.

[0038] The relative speed of the first rotor and the second rotor is the core parameter for setting the number of electromagnet 1 starts. By detecting the relative rotation speed of the two rotors, the system can dynamically adjust the number of electromagnets 1 working. At high relative speeds, the system can increase the number of electromagnets 1 turned on to improve power generation efficiency; at low relative speeds, the system reduces the number of electromagnets 1 started to reduce the mechanical resistance and power loss required for rotation. The relative speed directly affects the number of electromagnets 1 started. When the water flow rate is low, the relative speed of the two rotors is also low. At this time, the system automatically reduces the number of electromagnets 1 turned on, reducing the load of the overall system, so that the first rotor and the second rotor can start smoothly under low-speed water flow conditions and maintain a relatively stable rotation speed.

[0039] Multiple electromagnets 1 are arranged along the axial direction of the first rotor, and the arrangement of multiple electromagnets 1 enables the system to flexibly adjust the number of electromagnets 1 to be started according to actual needs. When the water flow speed is high, the system can enable more electromagnets 1 to increase the frequency of magnetic flux cutting and power generation efficiency; under low-speed water flow conditions, the system reduces the number of electromagnets 1 started to reduce the torque required for rotor rotation. The design of axial arrangement of electromagnets 1 provides flexibility, allowing the system to adjust in time according to water flow conditions. Detailed example: When the water flow speed is high (such as 3 m / s), the system can start all electromagnets 1 arranged along the axis to increase the magnetic field strength and improve power generation efficiency; when the water flow speed is low (such as 1.5 m / s), the system only starts some electromagnets 1 to reduce torque requirements and ensure that the generator set can operate normally at a lower starting torque.

[0040] By reducing the number of electromagnets 1 started, the system can significantly reduce the starting torque required for the rotation of the first rotor and the second rotor, especially under low-speed water flow conditions. This design optimizes the utilization of water flow energy and ensures that the rotor can still be effectively driven to rotate at low flow rates. At the same time, the strategy of reducing the rotational torque enhances the system's adaptability to water flow speed, especially in low-flow water, where the system can operate more flexibly by reducing the starting torque. Reducing the starting torque directly reduces the load of the water flow on the system, so that even when the water flow speed is not enough to drive the system to operate at full load, stable power generation output can still be achieved through the operation of some electromagnets 1. Detailed example: In an environment where the water flow speed is only 1.8 m / s, the system effectively reduces the starting torque by starting only a part of the electromagnets 1, so that the rotor can maintain stable rotation at a lower water flow, and the power generation efficiency can also be maintained at a high level.

[0041] The number of electromagnets 1 started is closely related to the rotation torque of the system. When more electromagnets 1 are started, the magnetic field generated is stronger, and the effect of cutting magnetic flux lines is better, but at the same time, the load of rotor rotation and the required starting torque are increased. By dynamically adjusting the number of electromagnets 1 started, the system can balance the power generation efficiency and the starting torque requirements at different water flow rates, ensuring that it can start smoothly and maintain rotation even when the water flow is too low. In a low flow rate environment (such as 1.5 m / s), the system automatically reduces the number of electromagnets 1 started, reduces the torque requirement, and ensures that the first rotor and the second rotor can start smoothly. The relative speed of the first rotor and the second rotor is an important control parameter for the number of electromagnets 1 started. When the relative speed is high, the system can start more electromagnets 1 to improve the power generation efficiency; when the relative speed is low, reducing the number of electromagnets 1 started can effectively reduce the load of the system, making it easier for the rotor to run under low-speed water flow. When the water flow rate is 2m / s, the relative speed of the first rotor and the second rotor is low. The system only starts a small number of electromagnets 1 according to the relative speed information, thereby reducing mechanical resistance and improving the adaptability of the system. The arrangement of electromagnets 1 along the axis provides more adjustment flexibility. The system can selectively start different numbers of electromagnets 1 according to the water flow velocity and rotor speed. Under high flow conditions, all electromagnets 1 are started to maximize power generation, while under low flow conditions, some are started to reduce torque requirements. This flexible control enables the system to effectively cope with various water flow conditions. At high water flow rates (3 m / s), the system starts all electromagnets 1 to improve power generation efficiency; while at low water flow rates (1.5 m / s), only some of the axially arranged electromagnets 1 are started, thereby reducing energy consumption and reducing water flow requirements. By dynamically adjusting the number of electromagnets 1 started, the system can effectively reduce the torque required for rotor rotation, thereby achieving better adaptability under low-speed water flow conditions. When the water flow rate is low, reducing the number of electromagnets 1 started can reduce the mechanical resistance when the rotor rotates, so that the generator set can still start smoothly and maintain power generation at low water flow rates. In low-flow waters (such as 1.8 m / s), the system reduces the rotational torque to a controllable range by reducing the number of electromagnets 1 started, so that the first rotor and the second rotor can operate normally at a lower starting torque, ensuring the continuity of power generation.

[0042] In summary, the first drive blade 2 and the second drive blade 5 are spirally extended along the axial direction to avoid excessive radial dimensions. This design not only maintains the force area, but also optimizes the utilization of water flow energy by increasing the axial dimension, reduces the overall volume of the generator set, and improves its adaptability in narrow or low-speed water flow environments. The first rotor and the second rotor can rotate in opposite directions, thereby greatly increasing the relative speed between the two rotors. This design effectively enhances the adaptability of the system in low-speed water flow. Even if the water flow speed is low and the relative speed of reverse rotation increases, a higher magnetic flux line cutting frequency can still be achieved to ensure power generation efficiency. This optimized design enables the system to adapt to different water flow speeds, especially in low-speed water flow environments. The dynamic start-up control of the electromagnet 1 also helps solve the problem of power generation efficiency. By adjusting the number of electromagnets 1 turned on according to the relative speed, the system avoids unnecessary energy waste in low-speed water flow and maximizes power generation efficiency. When the water flow speed is too low, reducing the number of electromagnets 1 turned on reduces the energy consumption and load of the system and optimizes the power generation performance in low-speed water flow.

[0043] In any of the above embodiments, the shell 3 is a hollow tube, and sealing plugs 7 are rotatably installed at the two ends through sealing rings 6, which are used to seal the shell 3 and to suspend and fix the shell 3 in water. The sealing plug 7 is suspended in the water by a sling 8. On the one hand, it can be easily moved, and on the other hand, the overall direction can be adjusted to maximize the efficiency of rotation driven by water flow; a sealing ring 6 is fixedly connected to the first rotor, so that the first drive blade 2 drives the first rotor located in the middle to rotate through the sealing ring 6.

[0044] In this embodiment, the housing 3 is the core structure of the generator set, which is designed as a hollow tube, and its main function is to accommodate and protect the key components inside, such as the first rotor, the second rotor, the electromagnet 1 and the electromagnetic coil 4. The housing 3 must have sufficient strength to withstand the pressure of the underwater environment, while maintaining lightness for easy hanging and movement. The hollow design not only reduces the weight of the generator set, but also provides a channel for water to flow through the drive blades to ensure the effective rotation of the rotor. The sealing plug 7 is installed at both ends of the housing 3 to play a sealing role, prevent water from entering the interior of the housing 3, and ensure the normal operation of the internal components in the underwater environment. The sealing plug 7 also cooperates with the sealing ring 6 to ensure the sealing of the housing 3. In addition, the sealing plug 7 is also suspended in the water by a sling 8 to ensure that the generator set can be firmly suspended in the water and allow the generator set to be adjusted according to the direction of the water flow. The sling 8 on the sealing plug 7 is used to suspend the generator set in the water, so that the entire device can be flexibly positioned. The design of the sling 8 not only facilitates the installation and movement of the generator set, but also optimizes the relative orientation of the equipment and the water flow by adjusting the angle, thereby improving the impact efficiency of the water flow on the drive blades and ensuring the maximum energy conversion efficiency. The sealing ring 6 is installed at the connection between the housing 3 and the sealing plug 7 to ensure the waterproofness of the inside of the housing 3. At the same time, the sealing ring 6 is fixedly connected to the first rotor. This design enables the first rotor to transmit the rotational force of the drive blades to the rotor located inside the housing 3 through the sealing ring 6, driving the rotor to rotate to complete the cutting of the magnetic flux lines and the generation of electrical energy. The sealing ring 6 also plays a role in reducing the resistance of the water flow, ensuring that the rotor can rotate smoothly under low resistance.

[0045] The housing 3 is sealed at both ends by sealing plugs 7 to prevent water from entering the housing 3 and protect the internal components. The sealing plug 7 is suspended in the water by a sling 8, so that the housing 3 can flexibly adjust its angle and position in the water. Through the sling 8, the generator set can adapt to different water flow directions and always maintain the best orientation to maximize the use of water flow to drive the drive blades to rotate. When the water flow speed is slow, the sling 8 allows the generator set to be freely suspended and adjusted according to the flow direction of the water flow, thereby ensuring that the first drive blade 2 can always obtain the best force effect and maximize the power generation efficiency.

[0046] The sealing ring 6 not only plays a waterproof role, but also connects to the first rotor so that the first rotor can transmit the rotational force of the driving blade through the sealing ring 6. In this way, the water flow pushes the sealing ring 6 through the driving blade, and the sealing ring 6 transmits the force to the first rotor to rotate it. Since the sealing ring 6 effectively isolates the internal electromagnet 1 system, it ensures that the rotor and the electromagnet 1 work in a dry environment, thereby avoiding damage to the electromagnetic system by the water flow. When the water flows through, the first driving blade 2 drives the sealing ring 6 to rotate, and the sealing ring 6 transmits force to the first rotor, so that the electromagnet 1 performs effective magnetic flux line cutting to achieve power generation.

[0047] The sealing plug 7 is suspended by a sling 8, allowing the generator set to freely adjust its angle in the water to adapt to changes in the water flow. The sling 8 not only improves the convenience of installation of the equipment, but also can ensure that the drive blades are always in a direction parallel to the water flow by adjusting the inclination angle of the equipment in the water, so as to maximize its force and improve the energy conversion efficiency of the equipment under different water flow conditions. When the direction of the water flow changes, the sling 8 enables the generator set to flexibly adjust its direction so that the water flow can always effectively impact the drive blades to ensure power generation efficiency.

[0048] The first driving blade 2 extends to the outside of the shell 3, and drives the first rotor to rotate by connecting with the sealing ring 6 inside the shell 3. The water flow acts on the driving blade outside the shell 3, causing it to generate a rotational force, which is transmitted to the first rotor inside the shell 3 through the sealing ring 6, driving the electromagnet 1 to rotate. The shell 3 is designed as a hollow tube to ensure that the water flow can flow through the blades unimpeded, and reduce the water flow resistance through appropriate structural optimization, thereby improving the working efficiency of the driving blades. In low-flow waters, the fluid path design in the shell 3 reduces the disturbance of the water flow, ensures the smooth rotation of the driving blades in the water flow, and thus drives the stable operation of the first rotor.

[0049] The sealing ring 6 and the sealing plug 7 work together to seal the housing 3, ensuring that water does not enter the generator set. The sealing ring 6 not only provides a waterproof function, but also acts as a transmission component to transmit the external rotational force to the rotor; and the sealing plug 7 is suspended in conjunction with the sling 8, so that the entire generator set can maintain good balance and stability in the water. When the water flow rate is high, the sealing plug 7 suspends the generator set through the sling 8, and the sealing ring 6 transmits the rotational force of the external drive blades to the internal rotor, ensuring that the system can operate stably under different water flow conditions.

[0050] In any of the above embodiments, multiple first drive blades 2 and second drive blades 5 are arranged along the circumferential direction, and the number of second drive blades 5 is greater than that of first drive blades 2, so that the first drive blades 2 can be better driven to rotate by water flow in the radial inner and outer conducting areas.

[0051] The projection of the first driving blade 2 along the axial direction is a closed first ring body 201. By forming a closed ring body, it can be ensured that the water flow encounters resistance when passing between the blades and drives the blades to rotate. The ratio of the outer radius of the first ring body 201 and the length of the first driving blade 2 along the axial direction is: 1 / 4~1 / 2.5, so that the axial dimension is significantly larger than the radial dimension.

[0052] The projection of the second driving blade 5 along the axial direction is a closed second ring body 501. By forming a closed ring body, it can be ensured that the water flow encounters resistance when passing between the blades and drives the blades to rotate. The ratio of the outer radius of the second ring body 501 and the length of the second driving blade 5 along the axial direction is: 1 / 15~1 / 10, so that the axial dimension is significantly larger than the radial dimension.

[0053] In this embodiment, the first drive blade 2 and the second drive blade 5 are arranged in multiple numbers along the circumferential direction, and the number of the second drive blades 5 is greater than that of the first drive blades 2. This design allows the second drive blades 5 to be arranged more densely on the outside of the first rotor, so as to more effectively capture the water flow power in the radial inner and outer conducting areas and promote the rotation of the blades; the second drive blades 5 are arranged on the periphery, which can form a stronger water flow power on the inside of the first drive blade 2, so that the first drive blade 2 can obtain sufficient driving force even when the water flow speed is low, thereby improving the power generation efficiency. The projections of the first drive blade 2 and the second drive blade 5 along the axial direction form a closed first ring body 201 and a second ring body 501 respectively. This closed ring body design can form a local pressure difference when the water flows through the blades, increase the driving force of the water flow on the blades, ensure that the water flow is effectively resisted when passing between the blades and drives the blades to rotate; the closed ring body design optimizes the interaction between the blades and the water flow, ensuring that each blade can convert the water flow energy into rotational power to the greatest extent when the water flows through. This design not only improves the starting efficiency, but also enhances the system's adaptability to low-speed water flow. The ratio of the outer radius of the first ring body 201 to the length of the first drive blade 2 along the axial direction is 1 / 4 to 1 / 2.5, while the ratio of the outer radius of the second ring body 501 to the length of the second drive blade 5 along the axial direction is 1 / 15 to 1 / 10. These proportion settings ensure that the axial dimension is larger than the radial dimension, which helps to increase the water flow action area of ​​the blade and improve its force efficiency; by adjusting the axial to radial dimension ratio, the generator set can effectively utilize the axial impact force of the water flow, especially in an environment with different water flow speeds. The increase in the axial dimension helps to capture sufficient water flow power even when the water flow is weak, thereby ensuring that the rotor can continue to rotate effectively.

[0054] By increasing the number of second drive blades 5, the density of the outer blades is increased, so that the internal first drive blades 2 can obtain sufficient water flow power even when the water flow is weak. The multi-blade design helps to balance the force of the entire generator set in the water flow, especially when the water flow speed changes greatly, it can maintain a stable output.

[0055] The closed loop design optimizes the contact between the blades and the water flow, and increases the efficiency of the water flow pushing the blades. When the water flows through the blades, a higher pressure difference is formed due to the formation of the closed loop, which pushes the blades to rotate effectively. This design helps to improve the starting and operating efficiency of the generator set in low-speed water flow.

[0056] The increase in axial dimension relative to radial dimension helps maintain the rotation efficiency of the generator set at different water flow speeds. In low-speed water flow, the larger axial dimension allows the blades to capture more water flow power, thus ensuring that the generator set can maintain sufficient rotation speed to generate electricity even at low water flow speeds.

[0057] In any of the above embodiments, an annular mixing chamber 9 is formed between the outer diameter of the first ring body 201 and the inner diameter of the second ring body 501. Since the rotation directions of the first drive blade 2 and the second drive blade 5 are completely opposite, and the two are corresponding to each other along the radial direction, the water flow flowing out in the radial direction during rotation will cause mutual disturbance, thereby forming a mixing chamber 9 for the water flow to mix and reduce interference between each other.

[0058] In this embodiment, the annular mixing chamber 9 formed between the outer diameter of the first ring body 201 and the inner diameter of the second ring body 501 mainly serves to provide a space in which the water flow can be mixed and buffered after passing through the first drive blade 2 and the second drive blade 5. This space allows the water flow to be redistributed and adjusted in direction, reducing the water flow disturbance and conflict caused by the opposite rotation directions of the blades. The first drive blade 2 and the second drive blade 5 correspond to each other along the radial direction, and the rotation directions are completely opposite. This configuration design allows the blades to efficiently capture the kinetic energy of the water in opposite directions. When rotating, the water flow discharged by the blades in the radial direction enters the mixing chamber 9, where the mixing chamber 9 plays the role of buffering and adjusting the direction of the water flow to adapt to the power requirements of the blades in opposite directions.

[0059] The mixing chamber 9 provides an area where water can be freely mixed and adjusted in direction, so that the kinetic energy of water from the oppositely rotating blades can be reconfigured here, reducing water flow conflicts and energy losses. This not only improves the power efficiency of water flow on the blades, but also stabilizes the overall operation of the system and reduces energy fluctuations caused by water flow interference.

[0060] The design of the blades is closely coordinated with the function of the mixing chamber 9, and the angle and position of the blades are precisely calculated to ensure that the water flow maintains a high energy utilization rate before and after entering the mixing chamber 9. In this way, the generator set can maintain a high power generation efficiency even when the water flow speed or direction changes.

[0061] The introduction of the mixing chamber 9 not only optimizes the performance of a single blade, but also enhances the hydrodynamic management of the entire generator set. This comprehensive fluid dynamics consideration enables the system to maintain stable and efficient power generation performance under various working conditions, especially under low-speed and unstable water flow conditions.

[0062] In any of the above embodiments, the ends of all the second drive blades 5 along the axial direction are fixedly assembled by connecting rings 10 to ensure that the second drive blades 5 will not be deformed in the radial direction when rotating; one connecting ring 10 is connected to the sealing ring 6 through a connecting rod 11, and the first rotor is driven to rotate through the connecting ring 10, the connecting rod 11 and the sealing ring 6, and an inlet port 12 for water flow is formed between the other connecting ring 10 and the shell 3, and the inlet port 12 is connected to the mixing chamber 9 along the axial direction. The inlet port 12 not only smoothly introduces the water flow into the mixing chamber 9, but also introduces the water flow into only between the first drive blades 2 and between the second drive blades 5.

[0063] In this embodiment, the ends of all the second drive blades 5 along the axial direction are fixedly assembled by a connecting ring 10. The main function of the connecting ring 10 is to ensure the structural integrity and stability of the second drive blade 5 during the rotation process, and to avoid radial deformation during rotation. This structural guarantee allows the blade to maintain good mechanical properties when rotating at high speed, ensuring the efficient operation of the generator. A connecting ring 10 is connected to the sealing ring 6 through a connecting rod 11. This design allows the connecting ring 10 to transmit power to the sealing ring 6 through the connecting rod 11, thereby driving the first rotor to rotate. This transmission mechanism ensures that the power transmission of the generator is efficient and continuous, and improves the energy conversion efficiency of the entire system. The inlet port 12 formed between another connecting ring 10 and the housing 3 provides a path for the water flow to enter the mixing chamber 9 smoothly. The inlet port 12 not only smoothly guides the water flow into the mixing chamber 9, but also guides the water flow between the first drive blade 2 and the second drive blade 5. This design optimizes the entry angle and speed of the water flow, ensuring that the water flow has appropriate power and direction before entering the blade.

[0064] The second drive blade 5 is fixed by the connecting ring 10 and combined with the connecting rod 11 and the sealing ring 6 to form an efficient and stable power transmission system. This stability not only protects the equipment from physical damage, but also ensures that the highest power generation efficiency can be maintained under various working conditions. The design of the inlet port 12 optimizes the water flow before entering the mixing chamber 9. This early fluid dynamics management provides the best working conditions for the blades, thereby achieving power optimization at the blade level. Such a water flow management strategy directly improves the overall power generation efficiency, especially the adaptability and efficiency under different water flow conditions. The coordinated work of the connecting ring 10, the connecting rod 11 and the sealing ring 6 enables each part of the entire power generation system to effectively transmit power, forming a tightly connected mechanical system in which the function of each component is maximized. This carefully designed synergy ensures high efficiency and low maintenance of the system during the production process.

[0065] Specifically, the first rotor includes a rotating shaft 13 disposed in the middle of the housing 3, the ends of the rotating shaft 13 are rotatably connected to the sealing plugs 7 respectively, the side wall of the rotating shaft 13 is fixedly assembled with the electromagnet 1, and one rotating end is fixedly connected to the sealing ring 6 to drive the rotating shaft 13 to rotate.

[0066] As can be seen from the above, the rotating shaft 13 is located in the middle of the housing 3 and is the main structural component of the first rotor. It is used to support and fix the electromagnet 1 to ensure its stability during rotation. The design of the rotating shaft 13 must be strong enough to withstand the mechanical pressure and torque generated during rotation. The end of the rotating shaft 13 is rotatably connected to the sealing plug 7, allowing the rotating shaft 13 to rotate freely under water-tight conditions. This connection method not only protects the internal mechanical components from water intrusion, but also ensures the smooth operation of the rotating shaft 13. The electromagnet 1 is fixedly assembled on the side wall of the rotating shaft 13, and the rotation of the rotating shaft 13 drives the electromagnet 1 to cut the magnetic flux lines around the stator coil to generate electrical energy. One end of the rotating shaft 13 is fixedly connected to the sealing ring 6, and the power transmission mechanism of the sealing ring 6 drives the rotating shaft 13 to rotate. This connection method is a key link in the transmission system, ensuring that the power received from the external blades can be effectively transmitted to the rotating shaft 13.

[0067] By optimizing the connection between the rotating shaft 13 and the sealing plug 7 and the sealing ring 6, as well as the assembly method of the electromagnet 1, this design ensures high efficiency and low energy loss during the power transmission process. The interaction of these components enables the system to operate stably under various water flow conditions and effectively generate electricity even when the water flow is weak. The rotational connection between the rotating shaft 13 and the sealing plug 7 ensures the sealing inside the system and prevents damage and corrosion that may be caused by water intrusion. This design extends the service life of the equipment and reduces maintenance costs. By precisely controlling the position of the electromagnet 1 and the stable operation of the rotating shaft 13, these designs optimize the magnetic field distribution and power generation of the entire system. More stable rotation and optimized magnetic field help improve the overall power generation efficiency.

[0068] In any of the above embodiments, the two slings 8 can move relative to each other, driving the first rotor and the second rotor to swing, so that the axis direction is the same as the water flow direction, so as to adapt to water flows in different directions.

[0069] In this embodiment, two slings 8 are connected to the two ends of the housing 3 and are designed to allow relative movement, thereby driving the entire generator set to swing axially. This design enables the generator set to automatically or manually adjust its position so that its axial direction is consistent with the direction of the flowing water flow, thereby achieving optimal water flow power capture. The swing of the first rotor and the second rotor is driven by the relative movement of the slings 8. This swing allows the generator set to adjust the angle of the blades relative to the water flow and maximize the use of water flow energy. By allowing relative movement between the two slings 8 and the swing of the rotor, the generator set can automatically adjust its own position to adapt to water flows from different directions.

[0070] The generator set can more efficiently convert the kinetic energy of water into electrical energy by dynamically adjusting the direction of its axis to match the direction of water flow. When the axis of the generator set is aligned with the direction of water flow, the impact of water flow on the blades is more direct and concentrated, thereby improving energy conversion efficiency and power generation.

[0071] Although the sling 8 allows the generator set to swing to adapt to different water flow directions, its design also maintains the stability and reliability of the entire system. By precisely controlling the tension and position of the sling 8, the system can maintain stability during the adjustment process, preventing structural stress and potential damage caused by excessive swinging.

[0072] The dynamic adjustment mechanism not only enhances the adaptability of the generator set to different water flow conditions, but also provides greater operational flexibility. Operators can adjust the position of the generator set according to specific environmental conditions to maximize its power generation potential.

[0073] In any of the above embodiments, the electromagnetic coil 4 is fixed to the inner wall of the shell 3, and the second drive blades 5 are fixed to the outer wall of the shell 3; since the second drive blades 5 are multiple in the circumferential direction, and the electromagnetic coil 4 is multiple in the circumferential and axial directions, a same structure such as a shell 3 is required to fix the electromagnetic coils 4 and the second drive blades 5, which are both multiple in number, so that all the electromagnetic coils 4 can be driven to rotate simultaneously through multiple second drive blades 5.

[0074] The second driving blade 5 rotates by driving the housing 3 to drive all the electromagnetic coils 4 to rotate simultaneously.

[0075] In this embodiment, the shell 3 serves as the main structure of the generator set, fixing the internal electromagnetic coil 4 and the external second drive blades 5. The solid design of the shell 3 is the basis for ensuring the stability of all components during operation, and it must also maintain sufficient strength to resist the mechanical stress caused by the water flow. The electromagnetic coil 4 is fixed to the inner wall of the shell 3, and the rotation of the shell 3 drives the electromagnetic coil 4 to rotate in the magnetic field of the stator, thereby generating electrical energy. The second drive blades 5 are fixed to the outer wall of the shell 3, and the impact of the water flow drives the shell 3 to rotate. Due to the large number of second drive blades 5, this layout provides a larger surface area to capture water flow energy and enhance the driving force.

[0076] By directly connecting the second drive blade 5 to the housing 3 with the electromagnetic coil 4, the entire system can operate as a single rotating unit, reducing losses during energy transfer and improving the energy efficiency and response speed of the overall system.

[0077] This layout of the second driving blade 5 and the electromagnetic coil 4 simplifies the additional gear or belt drive system required in the traditional generator, reduces mechanical loss and maintenance requirements, and improves the reliability and durability of the system.

[0078] The design and number of the second driving blades 5 enable the generator set to effectively adapt to water flows of different directions and speeds, thereby enhancing the system's ability to adapt to environmental changes, especially in an environment where the direction of the water flow changes frequently.

[0079] In any of the above embodiments, a first annular gap is formed between the electromagnet 1 and the electromagnetic coil 4 along the radial direction for the excitation mechanism to pass through, and the excitation mechanism changes the torque required for the first driving blade 2 to drive the electromagnet 1 by adjusting the number of electromagnets 1 opened along the axial direction.

[0080] In this embodiment, the first annular gap is located between the electromagnet 1 and the electromagnetic coil 4 and is arranged along the radial direction. This gap provides space for the excitation mechanism to adjust the magnetic field strength of the electromagnet 1, allowing the magnetic field to propagate freely between the electromagnet 1 and the electromagnetic coil 4, thereby optimizing the electromagnetic induction process. The electromagnet 1 is fixed in the housing 3 and is connected to the excitation mechanism. The excitation mechanism changes the required torque by adjusting the number of electromagnets 1 opened along the axial direction to adapt to the power generation needs under different water flow conditions. The excitation mechanism is responsible for controlling the number of electromagnets 1 opened and the magnetic field strength, which is crucial for adjusting the performance of the generator. The adjustment of the excitation mechanism can be optimized according to the water flow velocity and power generation needs.

[0081] The effective magnetic field control of the electromagnet 1 is achieved through the first annular gap and the excitation mechanism. Good magnetic field management not only improves the efficiency of electromagnetic induction, but also reduces energy loss, thereby directly improving the power generation and the overall performance of the system.

[0082] The excitation mechanism adapts to different operating conditions, especially in environments with large variations in water flow speed, by adjusting the number of electromagnets 1. This torque management strategy enables the generator to start and operate efficiently at lower water speeds while not overloading in high-speed water flows.

[0083] The stability of the generator set is ensured by the reasonable design and configuration of the first annular gap and the optimization of the control strategy of the excitation mechanism. This reduces the mechanical wear caused by uneven magnetic field or improper torque, and reduces the maintenance requirements and costs in long-term operation.

[0084] Specifically, the excitation mechanism includes a collector ring 14 and a brush 15. The collector rings 14 are fixed to each other and fixed to the sealing plug 7 through the collector ring 14 at one end, and connected to an external power supply through the collector ring 14 at the other end. The brush 15 is connected to each electromagnet 1 to perform power supply and electrical control of the opening and closing state. The excitation mechanism also includes a rectifier, an excitation controller, and a power supply.

[0085] As can be seen from the above, the collector ring 14 is installed in the fixed part of the equipment, usually fixed on the sealing plug 7, and is used to transmit external power to the electromagnet 1 of the rotating part. The brush 15 is in contact with the collector ring 14 to provide a continuous power supply to the rotating electromagnet 1. The rectifier is used to convert the alternating current received from the external power supply into direct current for supply to the electromagnet 1. This is because the electromagnet 1 requires direct current to generate a stable magnetic field. The excitation controller is responsible for regulating the size and timing of the current supplied to the electromagnet 1, and adjusting the excitation level of the electromagnet 1 according to the power generation demand and system status. The power supply provides the required electrical energy for the entire excitation mechanism to ensure the normal operation of the excitation system.

[0086] The effective coordination of the collector ring 14 and the brush 15, the accurate conversion of the rectifier, the precise regulation of the excitation controller and the stable power supply together ensure the stable operation and efficient output of the entire power generation system. The coordinated work of these components reduces the risk of system failure and improves the reliability of long-term operation.

[0087] By precisely controlling the excitation state of the electromagnet 1, the excitation controller can adjust the input current according to the real-time operating conditions, optimize the generation of the magnetic field, and thus maximize the output of electrical energy. The efficient operation of the rectifier and the collector ring 14 ensures that the electromagnet 1 can receive a stable and appropriate amount of direct current, further improving the power generation efficiency.

[0088] The design of the excitation mechanism allows the generator to flexibly adjust to different water flow speeds and directions, ensuring that the optimal power generation state can be maintained under changing environmental conditions. By adjusting the excitation state, the generator can better adapt to environmental changes and maintain efficient and stable output.

[0089] Furthermore, a plurality of conductive wires 16 are installed through a sealing plug 7 , and the conductive wires 16 are used to connect all electromagnetic coils 4 and each excitation mechanism so as to transmit and extract electric power.

[0090] As can be seen from the above, the conductive wire 16 is installed through the sealing plug 7, and is mainly used to connect the electromagnetic coil 4 and the excitation mechanism inside the housing 3 to achieve the transmission and extraction of electricity. The design of these lines must ensure good electrical performance and mechanical strength in a humid and dynamic environment. The electromagnetic coil 4 is connected to the excitation mechanism through the conductive wire 16, and receives the necessary direct current to generate a stable magnetic field. The correct electrical connection of these coils is essential to maintain a continuous and uniform magnetic field. The excitation mechanism receives power from an external power supply through the conductive wire 16, and then controls the current size and timing supplied to the electromagnetic coil 4. The power management capability of the excitation mechanism critically affects the response speed of the generator and its ability to adapt to different operating conditions. All electromagnetic coils are electrically connected to the conductive wire 16 through additional conductive rings and brushes.

[0091] The design of the conductive wire 16 on the sealing plug 7 must take into account electrical safety and mechanical stability to prevent possible damage to the circuit caused by water intrusion and mechanical stress. High-quality conductive wires 16 and reasonable wiring methods ensure the stable operation of the system in various environments.

[0092] The optimized layout of the conductive wire 16 and the use of high-performance materials can reduce resistance and energy loss. This efficient power transmission system ensures that the power conversion from the excitation mechanism to the electromagnetic coil 4 is as efficient as possible, improving the output performance of the entire power generation system.

[0093] By properly arranging the conductive wires 16 on the sealing plug 7, the maintenance of the system becomes more convenient. Neat wiring and easily accessible interfaces reduce maintenance time and costs, and also reduce the failure rate.

[0094] In any of the above embodiments, a first sensor for obtaining water flow velocity is installed on the sealing plug 7, and a second sensor for obtaining relative rotation speed is arranged on the first rotor and the second rotor. The first sensor and the second sensor are respectively connected to the controller above the water surface.

[0095] The excitation mechanism adjusts the number of electromagnets 1 opened according to the water flow rate and the relative rotation speed with the help of a controller.

[0096] In this embodiment, the water flow rate data provided by the first sensor allows the controller to adjust the excitation state of the electromagnet 1 in real time according to the water flow conditions, thereby optimizing the power generation efficiency. For example, the controller can increase the number of excitation electromagnets 1 accordingly according to the increase in water flow rate to increase the power generation. The relative speed data provided by the second sensor enables the controller to accurately adjust the number and timing of opening of the electromagnet 1 to ensure maximum utilization of the energy generated by the rotor. The adjustment can optimize the excitation based on the speed data to prevent overload or energy waste. The intelligent operation of the controller not only improves the reaction speed and adaptability of the generator, but also ensures the efficient operation of the system. It dynamically adjusts parameters according to real-time data to maximize power generation efficiency and protect the machine from damage caused by inappropriate operating conditions.

[0097] Real-time data monitoring from the primary and secondary sensors enables the controller to implement precise operational adjustments to optimize power generation efficiency. This monitoring and adjustment mechanism is critical to adapting to changing water flow conditions and maintaining efficient power generation.

[0098] Through intelligent management, the system can adapt to different environmental changes and automatically adjust to maintain the best operating state. This adaptive adjustment reduces the reliance on manual intervention and improves the system's operational convenience and reliability.

[0099] The controller reduces the possibility of system failure and improves the safety of the generator set through real-time monitoring and automatic adjustment. At the same time, by optimizing operating parameters, unnecessary maintenance and repair costs can be reduced.

[0100] Specifically, the controller can dynamically adjust the excitation state of the electromagnet 1 according to the data received from the sensor (such as the water flow velocity and the relative speed of the rotor), continuously monitor the key performance indicators of the system, and use the data collected from the first sensor (measuring the water flow velocity) and the second sensor (measuring the relative speed of the rotor) to implement adaptive feedback regulation, provide a user interface, and enable the operator to set the number of meals. The controller can be a programmable logic controller (PLC).

[0101] In any of the above embodiments, a second annular gap for spacing adjacent electromagnets 1 is formed between adjacent electromagnetic coils 4 along the axial direction, so as to avoid mutual interference between adjacent electromagnets 1 along the axial direction.

[0102] In this embodiment, the second annular gap is located between adjacent electromagnetic coils 4, providing necessary spatial separation along the axial direction to reduce the magnetic field interference between adjacent electromagnets 1. This gap is to ensure that the magnetic field generated by each electromagnet 1 can work in an orderly and effective manner within its given area, avoiding overlap and interference of magnetic fields with each other. The electromagnetic coil 4 is fixed in the housing 3 of the generator, and the circumferential and axial arrangements need to consider the optimal magnetic field distribution and power efficiency. The arrangement of the electromagnetic coil 4 needs to be coordinated with the second annular gap to maximize the function of each electromagnetic coil 4. The excitation state of each electromagnet 1 is adjusted by the control system according to the power generation demand and other operating parameters. The excitation mechanism needs to take into account the existence of the second annular gap to accurately control the magnetic field strength and distribution of each electromagnet 1.

[0103] The presence of the second annular gap reduces the interference between adjacent electromagnets 1. This design enhances the overall stability of the system and the reliability of long-term operation. In addition, the optimization of the magnetic field improves the power generation efficiency and reduces energy loss.

[0104] By physically isolating the components to reduce magnetic field interference, system maintenance becomes simpler because a problem with a single electromagnet 1 is unlikely to affect adjacent units. This design also reduces the failure rate due to magnetic field interference.

[0105] The second annular gap allows the designer to more flexibly adjust the number and layout of the electromagnets 1 to suit specific application requirements. This design flexibility is essential for customizing solutions and optimizing power generation efficiency for specific application scenarios.

[0106] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0107] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. An ultra-low flow rate tidal current energy generator set, characterized in that: include: A first rotor is provided with a plurality of electromagnets arranged in sequence along its axial direction, each of the electromagnets being electrically connected to the outside through an excitation mechanism; the first rotor is rotatably mounted inside the housing, and the first rotor is provided with a first driving blade extending to the outside of the housing; a second rotor extending along the axial direction and arranged circumferentially between the first rotor and the housing; the second rotor comprises a plurality of electromagnetic coils arranged along the axial direction, the electromagnetic coils corresponding to the electromagnets along the radial direction of the first rotor; the second rotor is provided with a second driving blade extending to the outside of the housing; Wherein, the first driving blade and the second driving blade both extend spirally with the axial direction as the axis, and the spiral directions of the first driving blade and the second driving blade are opposite, so that the rotation directions of the first rotor and the second rotor are opposite; the starting number of the electromagnet at each moment is set according to the relative speed between the first rotor and the second rotor.

2. The ultra-low flow velocity tidal current energy generator set according to claim 1, characterized in that: The shell is a hollow tube, and sealing plugs are rotatably mounted on the two ends through sealing rings, and the sealing plugs are suspended in the water through slings; one of the sealing rings is fixedly connected to the first rotor.

3. The ultra-low flow velocity tidal current energy generator set according to claim 2 is characterized in that: A plurality of the first driving blades and the second driving blades are arranged circumferentially; The projection of the first driving blade along the axis direction is a closed first ring body, and the ratio of the outer radius of the first ring body to the length of the first driving blade along the axis direction is: 1 / 4~1 / 2.5; The projection of the second driving blade along the axial direction is a closed second ring body, and the ratio of the outer radius of the second ring body to the length of the second driving blade along the axial direction is 1 / 15-1 / 10.

4. The ultra-low flow velocity tidal current energy generator set according to claim 2, characterized in that: An annular mixed flow cavity is formed between the outer diameter of the first ring body and the inner diameter of the second ring body.

5. The ultra-low flow velocity tidal current energy generator set according to claim 4, characterized in that: The ends of all the second driving blades along the axial direction are fixedly assembled by connecting rings respectively; one of the connecting rings is connected to the sealing ring through a connecting rod, and an inlet port for water flow is formed between the other connecting ring and the shell, and the inlet port is connected to the mixing chamber along the axial direction.

6. The ultra-low flow velocity tidal current energy generator set according to any one of claims 2-5, characterized in that: The two slings can move relative to each other, driving the first rotor and the second rotor to swing, so that the axis direction is the same as the water flow direction.

7. The ultra-low flow velocity tidal current energy generator set according to claim 2, characterized in that: The electromagnetic coil is fixed to the inner wall of the housing, and the second driving blade is fixed to the outer wall of the housing; The second driving blade drives the housing to rotate, thereby driving all the electromagnetic coils to rotate simultaneously.

8. The ultra-low flow velocity tidal current energy generator set according to claim 7, characterized in that: Along the radial direction, a first annular gap is formed between the electromagnet and the electromagnetic coil for the excitation mechanism to pass through. The excitation mechanism changes the torque required for the first driving blade to drive the electromagnet by adjusting the number of times the electromagnet is opened along the axial direction.

9. The ultra-low flow velocity tidal current energy generator set according to claim 8, characterized in that: A first sensor for obtaining a water flow velocity is installed on the sealing plug, and a second sensor for obtaining a relative rotation speed is arranged on the first rotor and the second rotor; The excitation mechanism adjusts the number of electromagnets opened according to the water flow rate and the relative rotation speed.

10. The ultra-low flow velocity tidal current energy generator set according to any one of claims 7 to 9, characterized in that: Along the axial direction, a second annular gap for spacing adjacent electromagnets is formed between adjacent electromagnetic coils.

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