Adaptive downstream power generation system

Abstract

An adaptive downstream power generation system, relating to the technical field of hydropower generation. The adaptive downstream power generation system comprises a base body and a pair of downstream assemblies pivotally connected to the base body. In terms of the projection area of the downstream assembly on a vertical plane passing through a pivot center line, the area located above the pivot center line is greater than the area located below the pivot center line. During the rotation of the downstream assembly relative to the base body around the pivot center line, the metacenter of the downstream assembly is higher than the center of gravity of the downstream assembly. The system has the advantages of strong adaptability and high operational reliability.

Description

Adaptive downstream power generation system Technical Field

[0001] This invention relates to the field of power generation technology utilizing energy generated by the flow of river and ocean water, and more specifically, to an adaptive downstream power generation system. This invention is based on two Chinese invention patent applications filed on January 16, 2025, with application number 202510071433.4 and titled "Adaptive Downstream Power Generation System," and filed on February 7, 2025, with publication number CN119982293A and titled "Adaptive Downstream Power Generation System," the contents of which are incorporated herein by reference as closely related to this invention. Background Technology

[0002] Patent document CN103334869A, entitled "Multifunctional Mounting Device for Current Generator and its Usage Method," discloses an adaptive downstream power generation system. The system consists of a generator and a mounting device. The mounting device includes a base and a mounting frame extending horizontally from the middle of the base to the left and right sides. The generator is fixed at the end of the mounting frame. There is also a fixed-depth stabilizing floating pipe extending upward from the base and a sliding float fitted on the fixed-depth stabilizing floating pipe. The sliding float, the turning rope, and a pair of downstream turning arms work together to achieve downstream turning action. Technical issues

[0003] This power generation system has many advantages, but it also has the following shortcomings. First, after long-term use in water, especially in seawater, the surface of the depth-stabilizing floating tube and the turning rope will be contaminated with marine organisms, making the sliding float difficult to slide and the rope easy to get stuck when passing the guide wheel or guide ring, thus affecting the generator's downstream turning and orientation when rising. Second, it is very difficult to disassemble and repair the generator on site.

[0004] Therefore, it is essential to provide an adaptive downstream power generation system that can effectively solve these two problems based on the existing technology. Technical solutions

[0005] The main objective of this invention is to provide an adaptive downstream power generation system with an improved flip structure.

[0006] Another object of the present invention is to provide an adaptive downstream power generation system that facilitates generator assembly and disassembly.

[0007] To achieve the aforementioned main objectives, the adaptive downstream power generation system provided by the present invention includes a base and a pair of mounting frames located on both sides of the base. The mounting frames are pivotally connected to the base, and the pivot centerline is perpendicular to the midline of the base in the length direction. A generator is fixed to the end of the mounting frame away from the base; a long sub-body is fixed to the end of the mounting frame closer to the base; a downstream component includes the generator, the mounting frames, and the long sub-body. From the perspective of the projected area of ​​the downstream component on the vertical plane passing through the pivot centerline, the area located above the pivot centerline is larger than the area located below the pivot centerline. During the rotation of the downstream component relative to the base around the pivot centerline, the center of inclination of the downstream component is higher than the center of gravity of the downstream component.

[0008] A further option is that the buoyancy control component includes the base and / or the elongated subbody, and the base and / or the elongated subbody has a buoyancy control chamber. The sinking or floating of the adaptive downstream power generation system is controlled by injecting water and venting air or injecting air and venting water into the buoyancy control chamber. The advantage of this option is that it allows for the rational selection of the buoyancy control chamber's location by comprehensively considering factors such as the operating environment, ease of operation, and manufacturing costs.

[0009] A further embodiment comprises a first elongated body and a second elongated body, wherein the centerline of the first elongated body intersects perpendicularly with the centerline of the pivot, and the second elongated body is fixed to the top of the first elongated body. The advantage of this embodiment is that the center of the area of ​​the downstream component located above the pivot centerline is relatively far from the pivot centerline, increasing the downstream overturning torque value and improving the buoyancy utilization rate of the substrate when the adaptive downstream power generation system is located on the water surface.

[0010] A further proposed solution is to house the buoyancy control cabin within the second elongated substructure. The advantage of this solution is that it provides a wider range of adjustment for both the overturning torque and the restoring torque.

[0011] A further proposed solution is that the second elongated sub-body consists of two segments along its length, located at both ends of the first elongated sub-body along its length. The advantage of this solution is that it optimizes the design by increasing the lever arm of the second elongated sub-body to reduce buoyancy, simplifying the structure while providing the same torque.

[0012] A further embodiment is that the buoyancy control assembly also includes a depth-stabilizing buoy, the lower end of which is fixed to the substrate.

[0013] Another further embodiment is that the downstream component also includes a downstream tilting arm, the lower end of which is fixed to the mounting frame.

[0014] To achieve another objective of the present invention, the adaptive downstream power generation system is further provided with a mounting base, the mounting base having an inner cavity and an opening that encloses most of the generator housing; the mounting base is fixed to the end of the mounting frame away from the base with the opening facing upward, and the generator is placed in the inner cavity with the rotation axis facing upward and then fixed on the mounting base.

[0015] Another further design involves an axially oriented groove at the open end of the mounting base, the grooves being evenly distributed circumferentially, and an ear mount at the bottom of the mounting base; the generator housing has protrusions that circumferentially engage with the grooves, and an ear plate at the bottom of the housing that engages with the ear mount. The advantage of this design is that it facilitates positioning and relative fixation during generator assembly and disassembly. Beneficial effects

[0016] The downstream component of this invention incorporates a long sub-body, with most of its area on the projection plane of the pivot centerline located above the pivot centerline. When the adaptive downstream power generation system sinks to its operating depth and there is an incoming current, the resultant force on the downstream component above the pivot centerline is greater than the resultant force below the pivot centerline. This generates an overturning moment that overcomes the restoring moment, causing the downstream component to rotate around the pivot until a dynamic equilibrium is reached between the overturning and restoring moments, i.e., the generator is in operation. When the incoming current gradually disappears, for example, during the process of the adaptive downstream power generation system rising to the surface, because the center of inclination of the downstream component is higher than its center of gravity, the restoring moment is greater than the overturning moment, causing the component to rotate back around the pivot to a positive buoyancy position. Similarly, in the case of adaptive downstream power generation, this invention, compared to existing technologies, eliminates the sliding float and overturning rope that cannot function properly when contaminated by marine organisms, and adds a long sub-body for overturning and recovery, thus avoiding interference from contaminated marine organisms.

[0017] The generator can be hoisted into and out of the inner cavity from the upper open end of the mounting base. Since the lower part of the generator has a streamlined shape when it is in the upright floating state, there is a large alignment tolerance when it is installed from the open end. This improves the convenience of generator assembly and disassembly for generators with large self-weight in working sites with large winds and waves. Attached Figure Description

[0018] Figure 1 is a front view of the first embodiment of the present invention;

[0019] Figure 2 is a left view of Figure 1;

[0020] Figure 3 is a perspective view of the first embodiment of the present invention floating on the water surface;

[0021] Figure 4 is a perspective view of the second embodiment of the present invention floating on the water surface;

[0022] Figure 5 is a three-dimensional structural diagram of the mounting base in Figure 4;

[0023] Figure 6 is a three-dimensional structural diagram of the generator in Figure 4;

[0024] Figure 7 is a schematic diagram of the power generation operation state of the second embodiment of the present invention.

[0025] The components include: base 1; centerline 11; mooring lug 12; anchor chain 13; downstream assembly 2; pivot centerline 20; mounting frame 21; generator 22; protrusion 221; ear plate 222; long sub-body 23; first long sub-body 231; second long sub-body 232; downstream tilting arm 24; mounting seat 25; groove 251; ear seat 252; reinforcing rod 26; buoyancy control assembly 3; depth-stabilizing floating tube 31; reinforcing member 32; and adaptive downstream power generation system 100. Embodiments of the present invention

[0026] The following is a detailed description of the various embodiments of the present invention and their accompanying drawings. Detailed Implementation

[0027] This invention is an improvement based on the prior art CN103334869A. In the following embodiments, only the structures that differ from the prior art are described in detail. At the same time, the matters that need to be paid special attention to during implementation are also explained. The electrical circuits, water and gas pipelines, etc. necessary for controlling the floating and buoyancy of the adaptive downstream power generation system 100 and power generation are omitted in each figure. Those skilled in the art can implement it based on common knowledge. First Embodiment

[0028] Referring to Figure 1, which is a front view of the first embodiment, i.e., the view of the adaptive downstream power generation system 100 in the positive floating state when the length direction of its base 1 is consistent with the direction of water flow. A pair of mounting frames 21 are located on the left and right sides of the base 1. The mounting frames 21 are connected to the base 1 by a pivot and can rotate relative to the base 1 around the pivot center line 20. The pivot center line 20 and the center line of the base 1 in the length direction are perpendicular to each other in space. In this example, the two are perpendicular and intersect. In other embodiments, the two may not intersect. It would be better to have the pivot center line 20 appropriately higher than the center line of the base 1. A generator 22 is fixed to the end of the mounting frame 21 furthest from the base 1, while a long sub-body 23 and a downstream tilting arm 24 are fixed to the end closer to the base 1. The lower end of the downstream tilting arm 24 is fixed to the mounting frame 21. Additionally, as shown in Figure 3, two reinforcing rods 26 are provided between the first long sub-body 231 and the mounting frame 21 to improve the overall structural strength of the downstream assembly. In this example, the mounting frame 21, generator 22, long sub-body 23, downstream tilting arm 24, and reinforcing rods 26 constitute the downstream assembly 2. Therefore, the downstream assembly 2 can rotate as a whole relative to the base 1 around the pivot centerline 20. The lower end of the depth-stabilizing floating tube 31 is fixed to the base 1. As shown in Figure 1, the entire downstream component 2 can be divided into two parts on the main view projection plane: the upper part and the lower part of the pivot center line 20. The projected area of ​​the downstream component 2 located above the pivot center line 20 is larger than the projected area of ​​the downstream component 2 located below the pivot center line 20. When the adaptive downstream power generation system 100 is submerged in water, as long as there is water flow, the force on the upstream component 2 located above the pivot center line 20 will be greater than the force on the downstream component 2 located below the pivot center line 20. When the overturning moment generated is greater than the restoring moment, it will drive the downstream component 2 to rotate around the pivot center line 20, causing the power generation system to rotate. The motor 22 tilts downstream and drives the impeller to rotate under the action of the water flow to generate electricity. Obviously, the tilting angle is large when the water flow is rapid and small when the water flow is slow. Usually or theoretically, the limit angle of tilting is 90 degrees. Since the downstream component 2 always keeps the tilting center higher than the center of gravity of the downstream component during the rotation of the downstream component 2 relative to the base 1 around the pivot center line 20, once the water flow disappears, that is, the tilting torque disappears, for example, after the adaptive downstream power generation system 100 is in still water or floats to the water surface, the restoring torque will drive the downstream component 2 back to the upright floating state shown in Figure 1.

[0029] Referring to Figure 2 and Figure 3, Figure 2 is a left view of Figure 1, and Figure 3 is a perspective view of the adaptive downstream power generation system 100 floating on the water surface. One end of the reinforcing member 32 is fixed to the end of the base 1, and the other end is fixed to the top of the depth-stabilizing floating pipe 31. The base 1 adopts a shell structure, and its interior is divided into four sealed chambers along the longitudinal direction. The two middle chambers are float control chambers, and the two at the ends are fixed float chambers. The fixed float chambers are chambers that only provide fixed buoyancy, while the float control chambers are chambers whose buoyancy can be adjusted as needed. When water is injected into the chamber and air is vented, the buoyancy of the chamber is relatively reduced, and when air is injected into the chamber and air is vented, the buoyancy of the chamber is relatively increased. In this example, the elongated sub-body 23 consists of a first elongated sub-body 231 and a second elongated sub-body 232. The centerline of the first elongated sub-body 231 intersects perpendicularly with the pivot centerline 20. The second elongated sub-body 232 is fixed to the top of the first elongated sub-body 231, with a discontinuity in the middle, thus forming two segments in the length direction, located at both ends of the first elongated sub-body 231 in the length direction. The first elongated sub-body 231 is configured as a fixed buoyancy chamber, and the second elongated sub-body 232 is configured as a buoyancy control chamber. When the elongated sub-body 23 and the base 1 provide maximum buoyancy, the adaptive downstream power generation system 100 floats on the water surface; when providing minimum buoyancy, the adaptive downstream power generation system 100 sinks underwater. Furthermore, in the presence of tidal currents, the downstream component 2 will adjust its angle of inclination according to the magnitude of the incoming current velocity. In this example, the base 1, the elongated body 23, and the fixed-depth stabilization floating pipe 31 together constitute the float control component 3. With the cooperation of the fixed-depth stabilization floating pipe 31, the anchor is in a fixed-depth power generation or standby power generation state. In this state, the two anchors are anchored along the direction of tide rise and fall, and the other end of the anchor chain 13 is fixed to the mooring lug 12.

[0030] The following points should be noted when implementing this invention:

[0031] First: The larger the area of ​​the downstream component 2 above the pivot centerline 20, the better the downstream overturning effect. However, if it is too large, the difference between the restoring torque and the overturning torque of the downstream component 2 will be negative. Therefore, the design of the downstream component 2 should fully consider balancing this contradiction.

[0032] Second: The main design idea of ​​this invention is that when the adaptive downstream power generation system 100 is on the water surface, the downstream component 2 should have the largest possible positive buoyancy stability, that is, the larger the restoring torque of the downstream component 2 rotating around the pivot center line 20 in the state shown in Figures 1 and 2, the better. When it sinks underwater, the restoring torque of the downstream component 2 rotating around the pivot center line 20 should be greater than zero, that is, the smaller the better, provided that the center of inclination is higher than the center of gravity. In order to achieve the above design idea, the design of the downstream component 2 needs to consider the coordination between the height of the center of gravity and the height of the center of buoyancy. When the elongated body 23 is equipped with a buoyancy control cabin, it has two major advantages. First, when it is on the water surface and provides maximum buoyancy, the downstream component 2 can be in a relatively stable state, that is, it is not easy to rotate relative to the base 1 around the pivot center line 20, so as to maintain or disassemble the generator on the water. Second, when it is underwater and provides minimum buoyancy, the restoring torque of the downstream component 2 is minimized, which is conducive to minimizing the angle between the axis of the generator 22 and the direction of the incoming flow, so as to obtain the best hydroelectric energy conversion efficiency. The height of the center of buoyancy and center of gravity can be calculated in advance during the design phase and counterweights can be added at appropriate locations after construction. Obviously, the best method is to set the long sub-body 23 as a buoyancy control cabin with an appropriate buoyancy adjustment range.

[0033] Third: This embodiment is used, for example, in a small power generation system. Under the premise that the base 1 is designed with a sufficient buoyancy adjustment range, the long sub-body 23 can be further simplified by reducing the structural strength or performance of the long sub-body 23. That is, the excessively large volume of the second long sub-body 232 can be reduced and set as a fixed floating pod; or the second long sub-body 232 can be omitted altogether, which can also meet the actual needs. Second Embodiment

[0034] Referring to Figure 4, which is a perspective view of the second embodiment of the present invention floating on the water surface, the following description focuses only on the differences between this example and the first embodiment. In this embodiment, the elongated body 23 is also composed of a first elongated body 231 and a second elongated body 232. However, the second elongated body 232 is a continuous elongated structure with a larger and longer size than the second elongated body 232 in the first embodiment. The first elongated body 231 is shorter and thinner than the first elongated body 231 in the first embodiment. This allows the elongated body 23 to have higher strength and better performance. In this example, the elongated body 23 is an elongated body whose length direction is the same as that of the base 1. The advantage is that when there is an incoming flow on the water surface in the direction indicated by the arrow in Figure 4, although the base 1 will tilt as shown in Figure 4 under the action of the anchor chain tension, the elongated body 23 can keep the downstream component 2 upright and less affected by the tilt of the base 1. This is beneficial for the maintenance and disassembly of the generator 22. In addition, a mounting base 25 is fixed to the end of the mounting frame 21 away from the base 1, and the generator 22 is fixed inside the mounting base 25. The advantage of fixing the generator 22 by the mounting base 25 is that it is easy to disassemble and assemble, especially for maintenance in remote areas. Furthermore, in this embodiment, the reinforcing rod 26 is connected at one end to the open end of the mounting base 25 and at the other end to the second elongated sub-body 232. This gives the downstream assembly 2 higher structural strength and allows it to support a larger generator 22.

[0035] It should be noted that, firstly, each of the second elongated bodies 232 in this embodiment preferably has two buoyancy control cabins symmetrically arranged at both ends in the length direction. Additionally, fixed buoyancy cabins can be symmetrically arranged in the second elongated body 232 along the length direction as needed to relatively increase the buoyancy center height of the elongated body.

[0036] Secondly, in this embodiment, setting the long sub-body 23 as the first long sub-body 231 and the second long sub-body 232 is an optimized design, but it can be further optimized. That is, on the one hand, the second long sub-body 232 is set as dumbbell-shaped, and on the other hand, the first long sub-body 231 is set as V-shaped in the length direction. In this way, the cost performance of the long sub-body 23 will be higher.

[0037] Third, this embodiment can be used as a small power generation system. Under the premise that the base 1 is designed with a sufficient buoyancy adjustment range, the long sub-body 23 can be further simplified by reducing the structural strength or performance of the long sub-body 23. That is, the first long sub-body 231 can be omitted, or the buoyancy control cabin can be omitted after reducing the volume of the second long sub-body 232. This can also meet the application requirements.

[0038] Referring to Figure 5, which is a three-dimensional structural diagram of the mounting base 25, the mounting base 25 is a roughly cage-shaped structure. The inner cavity of the cage can accommodate most of the outer shell of the generator 22. The upper end is open, and the guide end of the generator 22 can enter and exit through the open end. The shape and size of the inner cavity are basically consistent with the shape and size of the part of the generator 22 outer shell that enters through the open end. The open end of the mounting base 25 is provided with an axial groove 251. The three grooves 251 are evenly distributed in the circumferential direction. The bottom of each groove 251 is also provided with two fastening bolt holes. An ear seat 252 is provided at the bottom of the mounting base 25. The ear seat 252 is provided with a transverse through bolt hole.

[0039] Referring to Figure 6, which is a perspective view of the generator 22, the generator 22 housing has three protrusions 221 corresponding to the opening of the mounting base 25, which mate with the grooves 251. Each protrusion 221 also has two fastening bolt holes. The bottom has ear plates 222 that mate with the ear seats 252, and these ear plates also have bolt holes. When the generator 22 is hoisted into the mounting base 25 through the opening, simply control the relative rotation of the two components until the protrusions 221 enter the corresponding grooves 251 and the ear plates 222 are inserted into the ear seats 252. After installation, the generator 22 is fixed in the mounting base 25 using six fastening bolts and one bolt. Disassembling the generator 25 is done by reversing the above steps. Third Embodiment

[0040] The difference between this example and the second embodiment is that the base 1 is a float with a specific gravity slightly less than that of water, while the elongated subbody 23 is a float control cabin.

[0041] The working principle of the present invention will be explained in detail below with reference to Figure 7. Figure 7 is a schematic diagram of the power generation working state of the second embodiment of the present invention. The adaptive downstream power generation system 100, which is fixed in water depth, will exert a force on the downstream component 2 as indicated by the arrow. Since the upstream area above the pivot center line 20 of the downstream component 2 is larger than the downstream area below the pivot center line in the upright floating state, under the action of the water flow force, on the one hand, the base 1 will tilt under the tension of the anchor chain 13 in the direction of the upstream flow, and on the other hand, the downstream component 2 will rotate clockwise relative to the base 1 around the pivot center line 20, causing the blades of the generator 22 to tilt towards the working state, i.e., the downstream state. At the same time, the blades also rotate under the action of the upstream flow, driving the generator 22 to generate electricity, i.e., the state shown in Figure 7. When the upstream flow disappears, since the restoring torque of the downstream component 2 is greater than the overturning torque, it will adaptively return to the upright floating state. If the direction of the upstream flow is opposite to that indicated by the arrow in Figure 7, for example, during low tide, the base 1 will tilt in the opposite direction, and the downstream component 2 will rotate counterclockwise around the pivot center line 20 to the working state of the generator 22. Obviously, Figure 7 shows the ideal working state of the downstream component 2. In reality, the rotation angle of the downstream component 2 usually changes constantly with the strength of the current.

[0042] The following description, in conjunction with Figures 4 and 7, focuses on the method for controlling the buoyancy of the elongated float 23. When the elongated float 23 is equipped with a buoyancy control chamber, an air inlet / outlet is provided on the upper part of the end facing the incoming flow direction, and a water inlet / outlet is provided on the lower part of the end facing away from the incoming flow direction. Sinking operation: As shown in Figure 4, opening the air inlet / outlet and the water inlet / outlet allows water to be injected and air to be vented, causing the elongated float 23 to sink. Floating operation: As shown in Figure 7, opening the air inlet / outlet and the water inlet / outlet allows air to be injected and air to be vented, causing the elongated float 23 to float. Furthermore, when the base 1, the elongated sub-body 23, and the depth-stabilizing float 31 are all equipped with buoyancy control chambers, the following procedures apply to descent operations: First, water should be injected into and vented from the base 1, then water should be injected into and vented from the elongated sub-body 23, and finally water should be injected into and vented from the depth-stabilizing float 31. For ascent operations, first air should be injected into and vented from the depth-stabilizing float 31, then air should be injected into and vented from the elongated sub-body 23, and finally air should be injected into and vented from the base 1. It is also crucial to emphasize that, regardless of whether it is a descent or ascent operation, the two elongated sub-body 23s on both sides should ideally be controlled in parallel. Other implementation methods

[0043] In the above examples, the pivot centerline 20 intersects perpendicularly with the centerline 11 of the base 1, but this is not necessary. The pivot centerline 20 being higher than the centerline 11 will make it easier to disassemble and assemble the generator 22 on site.

[0044] In addition, when the adaptive downstream power generation system 100 is used specifically for rivers, since the flow direction is unidirectional and unchanging, setting the pivot at the back end of the base 1 will save more manufacturing materials for the base 1 and reduce one anchor chain 13.

[0045] Finally, one of the base body 1 and the elongated body 23 must be a buoyancy control cabin, that is, capable of controlling the overall buoyancy of the adaptive downstream power generation system 100. The buoyancy design and buoyancy variation range of the elongated body 23, its height relative to the pivot centerline, etc., should be comprehensively considered based on the specific structure of the downstream component 2, and therefore there will be various implementation variations. Industrial applicability

[0046] When the adaptive downstream power generation system sinks to its operating depth and there is an incoming current, the resultant force on the downstream component above the pivot centerline is greater than the resultant force below the pivot centerline. The resulting overturning moment overcomes the restoring moment, causing the downstream component to rotate around the pivot until a dynamic equilibrium is reached between the overturning and restoring moments, i.e., the generator is in its power generation state. When the incoming current gradually disappears, for example, during the process of the adaptive downstream power generation system rising to the surface, because the center of inclination of the downstream component is higher than its center of gravity, the restoring moment is greater than the overturning moment, causing it to rotate back around the pivot to a positive floating position. Similarly, in the case of adaptive downstream power generation, this invention, compared to existing technologies, eliminates the sliding float and overturning rope that cannot function properly when fouled by marine organisms, and adds a long sub-body for overturning and recovery, thus avoiding interference from fouled marine organisms.

[0047] The generator can be hoisted into and out of the inner cavity from the upper open end of the mounting base. Since the lower part of the generator has a streamlined shape when it is in the upright floating state, there is a large alignment tolerance when it is installed from the open end. This improves the convenience of generator assembly and disassembly for generators with large self-weight in working sites with large winds and waves.

Claims

1. An adaptive downstream power generation system, comprising a base and a pair of mounting frames located on both sides of the base, the mounting frames being pivotally connected to the base, the center line of the pivot being perpendicular to the center line of the base in the length direction, and a generator being fixed at the end of the mounting frame away from the base; Its features are: A long sub-body is fixed to one end of the mounting frame near the base, and the length direction of the long sub-body is consistent with the length direction of the base; The downstream assembly includes the generator, the mounting frame, and the elongated subbody. From the perspective of the projected area of ​​the downstream assembly on the vertical plane passing through the pivot centerline, the area located above the pivot centerline is larger than the area located below the pivot centerline. During the rotation of the downstream assembly relative to the base body around the pivot centerline, the center of inclination of the downstream assembly is higher than the center of gravity of the downstream assembly.

2. The adaptive downstream power generation system according to claim 1, characterized in that: A buoyancy control assembly, including the base and / or the elongated subbody, the base and / or the elongated subbody having a buoyancy control chamber, controls the sinking or floating of the adaptive downstream power generation system by injecting water and venting or injecting air and draining water into the buoyancy control chamber.

3. The adaptive downstream power generation system according to claim 2, characterized in that: The elongated body includes a first elongated body and a second elongated body. The centerline of the first elongated body intersects perpendicularly with the centerline of the pivot. The second elongated body is fixed to the top of the first elongated body.

4. The adaptive downstream power generation system according to claim 3, characterized in that: The buoyancy control cabin is located within the second elongated sub-body.

5. The adaptive downstream power generation system according to claim 4, characterized in that: The second elongated sub-body consists of two segments along its length and is located at both ends of the first elongated sub-body along its length.

6. The adaptive downstream power generation system according to claim 2, characterized in that: The buoyancy control assembly also includes a depth-stabilizing buoy tube, the lower end of which is fixed to the substrate.

7. The adaptive downstream power generation system according to claim 1, characterized in that: The downstream assembly also includes a downstream tilting arm, the lower end of which is fixed to the mounting frame.

8. The adaptive downstream power generation system according to any one of claims 1 to 7, characterized in that: A mounting base having an inner cavity and an opening that encompass most of the generator's housing; The mounting base is fixed to the end of the mounting frame away from the base in an open-facing configuration, and the generator is placed in the inner cavity and fixed to the mounting base in an axially upward configuration.

9. The adaptive downstream power generation system according to claim 8, characterized in that: The open end of the mounting base is provided with an axial groove, which is evenly distributed in the circumferential direction. The bottom of the mounting base is also provided with an ear seat. The generator housing has a protrusion that circumferentially mates with the groove, and the bottom of the housing has an ear plate that mates with the ear seat.

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