A river hydroelectric power generation system

Abstract

This invention relates to the field of hydropower technology, specifically to a river hydropower system. It utilizes the energy conversion of hydraulic machinery to convert the potential energy of river water into electrical energy. When the water level is low, only the first valve in the drain pipe leading to the main turbine is opened, causing the main turbine to rotate under the impact of the water flow, driving the main shaft to rotate. At this time, the clutch assembly of the motorized turbine disengages, preventing the motorized turbine from operating and rotating with the main shaft, thus reducing the energy consumption of the main shaft. When the water level switch detects that the water level in the storage container has reached a certain threshold, the first valve in the corresponding drain pipe is opened, introducing water into the motorized turbine. The motorized turbine rotates under the impact of the water flow. A speed sensor is installed on the motorized turbine to monitor its rotational speed. When the speed reaches the engagement speed (i.e., the speed difference with the main shaft speed is within a set threshold), the clutch assembly engages, causing the motorized turbine to rotate synchronously with the main shaft, reducing vibration during engagement and improving the stability of the turbine assembly.

Description

Technical Field

[0001] This invention relates to the field of hydropower technology, and more particularly to a river hydropower system. Background Technology

[0002] River hydropower is a technology that utilizes the potential and kinetic energy of water flow in natural river channels to drive a turbine, which in turn drives a generator to produce electricity. A hydroelectric generator is a typical hydraulic machine that converts the potential energy of water into electrical energy. Modern river hydropower typically adopts a run-of-river development model, meaning it largely does not regulate river flow and mainly utilizes natural water flow for power generation, resulting in relatively low impact on the ecological environment. However, river flow and water level can vary significantly with seasonal and climatic changes. Without targeted adjustments to the power generation system, this can lead to low power generation efficiency.

[0003] In existing technologies, multiple water outlets are set in a water storage container. The number of water outlets is controlled according to the changes in the water level and flow rate of the river. Each water outlet corresponds to a water turbine, thereby controlling different numbers of water turbines to drive the main shaft to rotate, so as to generate electricity for different flow rates.

[0004] However, the applicant has found that the prior art has at least the following problems:

[0005] Since multiple turbines are installed on the same main shaft, when the water flow is small, a single turbine drives the main shaft to rotate, while the other turbines rotate with the main shaft, which consumes the power provided by the turbines doing the work, reducing the power generation efficiency. Summary of the Invention

[0006] In view of this, the purpose of this invention is to propose a river hydroelectric power generation system to solve the problem that when a single water turbine drives the main shaft to rotate, the power provided by the working water turbine is consumed and the power generation efficiency is reduced as other non-working water turbines rotate with the main shaft.

[0007] To achieve the above objectives, the present invention provides a river hydroelectric power generation system, comprising a water storage container, multiple drainage pipes, a turbine assembly, and a generator. The water storage container is connected to each drainage pipe, and the turbine assembly is located at the outlet of each drainage pipe. Each turbine assembly includes a main shaft, a main turbine fixedly mounted at the center of the main shaft, and at least two motorized turbines symmetrically arranged on both sides of the main turbine via bearings. Each drainage pipe is provided with a first valve that is controlled to open and close. The first valve is connected to a level switch, which monitors the water level in the water storage container and controls the opening and closing of the first valve based on the water level signal. Each motorized turbine is provided with a clutch assembly on both sides, which controls the transmission connection between the motorized turbine and the main shaft based on the water level signal.

[0008] When the water level signal reaches the level threshold, the first valve of the corresponding drain pipe is opened first, driving the motorized water turbine to rotate to the engagement speed. The clutch assembly engages, and the motorized water turbine rotates synchronously with the main shaft. When the water level signal does not reach the level threshold, the clutch assembly disengages, and the motorized water turbine disengages from the main shaft.

[0009] Optionally, the clutch assembly includes a fixed ring integrally formed with the main shaft and located on both sides of the motorized water turbine. The fixed ring has multiple sets of protrusions arranged in a circumferential array. The clutch assembly also includes a movable sleeve sleeved around the outer circumference of the fixed ring. The movable sleeve has a moving groove on its inner side that matches the protrusions, so that the movable sleeve can move axially and maintain circumferential linkage with the fixed ring. One end of the movable sleeve near the motorized water turbine is provided with a friction plate, and the other end is connected to a connecting plate through a connecting bearing. A threaded sleeve is fixedly connected to the end of the connecting plate, and the threaded sleeve and a double-acting screw form a threaded pair. When the double-acting screw rotates, it drives the connecting plates on both sides of the motorized water turbine to move synchronously towards or away from each other, thereby driving the movable sleeve and the friction plate to move axially. When the two connecting plates move towards each other to a set position, the friction plate presses against the side of the motorized water turbine, realizing the transmission engagement between the motorized water turbine and the main shaft.

[0010] Optionally, the drain pipe is equipped with a filter screen and a filter screen cleaning channel. The side of the protrusion is connected to a movable block via a hydraulic push rod. The movable block is arranged on the water-facing side of the water turbine. The main shaft is equipped with multiple oil passages. Each oil passage is connected to a corresponding hydraulic push rod and provides hydraulic pressure to it. Each oil passage is equipped with an electronically controlled valve and a pressure sensor to monitor the oil pressure in the oil passage.

[0011] When the pressure value detected by the pressure sensor is within the preset hydraulic threshold range, the system is determined to be operating normally;

[0012] When the detected pressure value is lower than the preset hydraulic threshold range, it is determined that the motorized water turbine is malfunctioning and is in a state of idling driven by the main shaft. At this time, the filter cleaning channel is opened to perform a cleaning operation on the filter in the drain pipe corresponding to the motorized water turbine. After cleaning, if the detected pressure returns to the preset hydraulic threshold range, the fault is determined to be resolved; otherwise, it is determined to be a water turbine assembly fault and a fault alarm signal is generated.

[0013] If the pressure value detected by the pressure sensor is higher than the preset hydraulic threshold range, it is determined that the main water turbine is malfunctioning and is in a state of idling driven by the main shaft. At this time, the cleaning channel is opened to clean the filter screen in the drain pipe corresponding to the main water turbine. After cleaning, if the detected pressure returns to the preset hydraulic threshold range, it is determined that the fault is resolved; otherwise, it is determined that the water turbine assembly is faulty and a fault alarm signal is generated.

[0014] Optionally, the electrically controlled valve is electrically connected to the hydraulic sensor via a brush, and the brush is electrically connected to a slip ring. The slip ring is sleeved on the main shaft and connected to the electrical control system for supplying power and controlling the electrically controlled valve and the hydraulic sensor.

[0015] Optionally, the oil distribution channel is connected to an annular oil channel, the annular oil channel is connected to a distribution oil channel, the distribution oil channel is connected to a connection port, the connection port is located at the end away from the generator, the connection port is rotatably sealed to an oil pipe, and the oil pipe is connected to an oil pump.

[0016] Optionally, the filter cleaning channel includes a diversion pipe connected to a drain pipe, with the interface located below the filter screen. The filter screen can be flipped and installed in the drain pipe. A first valve is installed in the drain pipe below the interface, and a second valve is installed in the diversion pipe. Multiple diversion pipes are connected to a confluence pipe, which is connected to a discharge pipe. When the cleaning action is performed, the first valve is closed, the second valve is opened, and the filter screen flips.

[0017] Optionally, the motorized water turbine includes two sets of primary water turbines and two sets of secondary water turbines. Primary connecting plates are connected to the clutch assemblies on both sides of the primary water turbines. Primary threaded sleeves are installed on the primary connecting plates, and primary bidirectional lead screws are threadedly connected to the primary threaded sleeves. The primary bidirectional lead screws are integrally formed with primary drive rods, and a primary drive motor is connected to the end of the primary drive rod. Secondary connecting plates are connected to the clutch assemblies on both sides of the secondary water turbines. Secondary threaded sleeves are installed on the secondary connecting plates, and secondary bidirectional lead screws are threadedly connected to the secondary threaded sleeves. Secondary drive rods are integrally formed with the secondary bidirectional lead screws, and a secondary drive motor is connected to the end of the secondary drive rod. The primary connecting plates are longer than the secondary connecting plates, and the primary connecting plates have clearance holes for the passage of the secondary connecting plates.

[0018] Optionally, mounting frames are installed on both sides of the turbine assembly, bearing seats are installed at both ends of the main shaft, the bearing seats are mounted on the mounting frames, a control box is also installed on the mounting frames, and a guide channel is installed at the bottom of the mounting frames to guide the water flow out of the turbine assembly.

[0019] Optionally, the water storage container has a water collection tank at the bottom, and the drain pipes are distributed in the water collection tank. The water collection tank is used to guide the water flow to the drain pipes.

[0020] The beneficial effects of this invention are as follows: This invention provides a river hydroelectric power generation system that utilizes the energy conversion of hydraulic machinery to convert the potential energy of river water into electrical energy. When the water level is low, only the first valve in the drain pipe leading to the main turbine is opened, causing the main turbine to rotate under the impact of the water flow and drive the main shaft to rotate. At this time, the clutch assembly of the motorized turbine disengages, so that the motorized turbine does not work and does not rotate with the main shaft, reducing the energy consumption of the main shaft. When the water level switch detects that the water level in the storage container has reached the level threshold, the first valve of the corresponding drain pipe is opened to introduce water into the motorized turbine. The motorized turbine rotates under the impact of the water flow. A speed sensor is installed on the motorized turbine to monitor its speed. When the speed reaches the engagement speed, that is, the speed difference with the main shaft speed is within the set threshold, the clutch assembly engages, causing the motorized turbine to rotate synchronously with the main shaft, reducing vibration during engagement and improving the stability of the turbine assembly. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for this invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is an overall schematic diagram of a river hydroelectric power generation system according to an embodiment of the present invention;

[0023] Figure 2 This is a partial cross-sectional schematic diagram of a river hydroelectric power generation system according to an embodiment of the present invention;

[0024] Figure 3 This is a partial schematic diagram of a river hydroelectric power generation system according to an embodiment of the present invention;

[0025] Figure 4 This is a schematic diagram of the drainage pipe structure of a river hydroelectric power generation system according to an embodiment of the present invention;

[0026] Figure 5 This is a schematic diagram of the structure of a turbine assembly 201 in a river hydroelectric power generation system according to an embodiment of the present invention;

[0027] Figure 6 This is a schematic diagram of the structure of a water turbine in a river hydroelectric power generation system according to an embodiment of the present invention;

[0028] Figure 7 for Figure 6 A magnified view of part A in the middle;

[0029] Figure 8 This is a schematic diagram of the internal structure of the main shaft of a river hydroelectric power generation system according to an embodiment of the present invention;

[0030] Figure 9 for Figure 8 A magnified view of part B in the diagram.

[0031] The diagram is marked as follows:

[0032] 101. Water storage container; 102. Water collection tank; 103. Drainage pipe; 104. Diversion pipe; 105. Combination pipe; 106. Discharge pipe; 1031. Filter screen; 1032. First valve; 1033. Second valve; 201. Water turbine assembly; 202. Main shaft; 203. Bearing housing; 204. Main water turbine; 205. First-stage water turbine; 206. Second-stage water turbine; 2051. First-stage connecting plate; 2052. First-stage threaded sleeve; 2053. First-stage double-acting screw; 2054. Clearance hole; 2055. First-stage drive rod; 2056. First-stage drive... Motor; 2061, Secondary connecting plate; 2062, Secondary threaded sleeve; 2063, Secondary double-acting screw; 2064, Secondary drive rod; 207, Generator; 2021, Fixed ring; 2022, Protrusion; 2023, Moving block; 301, Oil pipe; 302, Oil pump; 303, Connection port; 304, Distribution oil passage; 305, Annular oil passage; 306, Distribution oil passage; 307, Brush; 308, Slip ring; 401, Friction plate; 402, Moving sleeve; 403, Connecting bearing; 501, Mounting bracket; 502, Control box; 503, Guide channel. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments.

[0034] It should be noted that, unless otherwise defined, the technical or scientific terms used in this invention should have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "first," "second," and similar terms used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0035] like Figures 1 to 9As shown in the figure, a specific embodiment of the present invention provides a river hydroelectric power generation system, including a water storage container 101, multiple drainage pipes 103, a turbine assembly 201, and a generator 207. The water storage container 101 is connected to each drainage pipe 103, and the turbine assembly 201 is provided at the outlet of each drainage pipe 103. The turbine assembly 201 includes a main shaft 202, a main turbine 204 fixedly installed at the center of the main shaft 202, and at least two motorized turbines symmetrically arranged on both sides of the main turbine 204 via bearings. Each drainage pipe 103 is provided with a first valve 1032 that is controlled to open and close. The first valve 1032 is connected to a level switch, which is used to monitor the water level in the water storage container 101 and control the opening and closing of the first valve 1032 according to the water level signal. Each motorized turbine is provided with a clutch assembly on both sides, which is used to control the transmission connection state between the motorized turbine and the main shaft 202 according to the water level signal.

[0036] When the water level signal reaches the level threshold, the first valve 1032 of the corresponding drain pipe 103 is opened first, and the motorized water wheel is driven to rotate to the engagement speed. The clutch assembly is engaged, and the motorized water wheel rotates synchronously with the main shaft 202. When the water level signal does not reach the level threshold, the clutch assembly is disengaged, and the motorized water wheel is disengaged from the main shaft 202.

[0037] During operation, the water storage container 101 is connected to the river channel, allowing water from the river to be introduced into the water storage container 101. The opening and closing of the drainage pipe 103 is controlled according to the water level in the water storage container 101. When the water level is low, only the first valve 1032 in the drainage pipe 103 leading to the main water turbine 204 is opened, causing the main water turbine 204 to rotate under the impact of the water flow, which in turn drives the main shaft 202 to rotate. At this time, the clutch assembly of the motorized water turbine disengages, preventing the motorized water turbine from operating and rotating with the main shaft 202, thus reducing the speed of the main shaft 202. Energy consumption: When the water level switch detects that the water level in the water storage container 101 has reached the level threshold, it opens the first valve 1032 of the corresponding drain pipe 103 to introduce water into the motorized water turbine. The motorized water turbine rotates under the impact of the water flow. A speed sensor is installed on the motorized water turbine to monitor its speed. When the speed reaches the engagement speed, that is, when the speed difference with the speed of the main shaft 202 is within the set threshold, the clutch assembly engages, so that the motorized water turbine rotates synchronously with the main shaft 202, reducing vibration during engagement and improving the stability of the water turbine assembly 201.

[0038] In some optional specific embodiments, such as Figures 6 to 9As shown, the clutch assembly includes a fixed ring 2021 integrally formed with the main shaft 202 and located on both sides of the motorized water turbine. The fixed ring 2021 has multiple sets of protrusions 2022 arranged in a circumferential array. The clutch assembly also includes a movable sleeve 402 sleeved around the outer periphery of the fixed ring 2021. The inner side of the movable sleeve 402 has a moving groove adapted to the protrusions 2022, allowing the movable sleeve 402 to move axially and maintain circumferential linkage with the fixed ring 2021. The movable sleeve 402 is located near the motorized water turbine. One end is provided with a friction plate 401, and the other end is connected to a connecting plate through a connecting bearing 403; a threaded sleeve is fixed to the end of the connecting plate, and the threaded sleeve and a double-acting screw form a threaded pair; when the double-acting screw rotates, it drives the connecting plates on both sides of the motorized water turbine to move synchronously towards or away from each other, thereby driving the movable sleeve 402 and the friction plate 401 to move axially; when the two connecting plates move towards each other to a set position, the friction plate 401 presses against the side of the motorized water turbine, realizing the transmission engagement between the motorized water turbine and the main shaft 202.

[0039] When the water level change clutch assembly is working, the bidirectional lead screw rotates, driving the connecting plates to move synchronously in opposite directions or away from each other, thereby driving the movable sleeve 402 and friction plate 401 to move axially. When the two connecting plates move towards each other to the set position, the friction plate 401 presses against the side of the motorized water turbine, realizing the transmission engagement between the motorized water turbine and the main shaft 202, thereby achieving the purpose of the main water turbine 204 and the motorized water turbine working together to drive the main shaft 202 to rotate and do work.

[0040] In some optional specific embodiments, such as Figure 4 As shown in Figures 6 to 9, the drain pipe 103 is equipped with a filter screen 1031 and a filter screen cleaning channel. The side of the protrusion 2022 is connected to a movable block 2023 via a hydraulic push rod. This movable block 2023 is positioned on the water-facing side of the water turbine. The main shaft 202 is equipped with multiple oil passages 306, each connected to a corresponding hydraulic push rod and providing hydraulic pressure. Each oil passage 306 is equipped with an electrically controlled valve and a pressure sensor to monitor the oil pressure within it.

[0041] When the pressure value detected by the pressure sensor is within the preset hydraulic threshold range, the system is determined to be operating normally;

[0042] When the detected pressure value is lower than the preset hydraulic threshold range, it is determined that the motorized water turbine is malfunctioning and is in a state of idling driven by the main shaft 202. At this time, the filter cleaning channel is opened to perform a cleaning operation on the filter 1031 in the drain pipe 103 corresponding to the motorized water turbine. After cleaning, if the detected pressure returns to the preset hydraulic threshold range, the fault is determined to be resolved; otherwise, the water turbine assembly 201 is determined to be faulty and a fault alarm signal is generated.

[0043] If the pressure value detected by the pressure sensor is higher than the preset hydraulic threshold range, it is determined that the main water turbine 204 is malfunctioning and is in a state of idling driven by the main shaft 202. At this time, the cleaning channel is opened to clean the filter screen 1031 in the drain pipe 103 corresponding to the main water turbine 204. After cleaning, if the detected pressure returns to the preset hydraulic threshold range, it is determined that the fault is resolved; otherwise, it is determined that the water turbine assembly 201 is faulty and a fault alarm signal is generated.

[0044] During operation, if the system is working normally, the main water turbine 204 and the motorized water turbine jointly drive the main shaft 202 to rotate. The pressure between the movable block 2023 and the moving groove is within a certain range, and the pressure inside the corresponding oil channel 306 is within the preset hydraulic threshold range. When the filter screen 1031 in the drain pipe 103 becomes clogged, the water flow in the drain pipe 103 will decrease. At this time, if the water flow corresponding to the motorized water turbine decreases, the impact of the water flow on the motorized water turbine will decrease, resulting in a decrease in its driving force. Therefore, its rotational speed may be less than the rotational speed of the main shaft 202 driven by the main water turbine 204. In this case, [the following text is incomplete and requires further context: "at this time, ..."] The main shaft 202 drives the motorized water turbine to idle. At this time, the squeezing pressure between the movable block 2023 on the water-facing side and the moving trough decreases, making the pressure in the oil distribution channel 306 less than the hydraulic threshold range. Conversely, if the water flow corresponding to the main water turbine 204 decreases, the main water turbine 204 is driven to idle by the motorized water turbine, making the pressure in the oil distribution channel 306 greater than the hydraulic threshold range. This is used to simply locate and troubleshoot faults. If the specific fault point cannot be identified, an alarm is triggered and maintenance personnel handle and resolve the issue. This can automatically resolve some faults. For faults that cannot be handled, the fault point can be preliminarily determined, improving the maintenance efficiency of maintenance personnel.

[0045] In some optional specific embodiments, such as Figure 9 As shown, the electrically controlled valve and the hydraulic sensor are electrically connected by a brush 307, and the brush 307 is electrically connected to a slip ring 308. The slip ring 308 is sleeved on the main shaft 202 and is connected to the electrical control system for supplying power and controlling the electrically controlled valve and the hydraulic sensor.

[0046] In some optional specific embodiments, such as Figure 9 As shown, the oil distribution channel 306 is connected to an annular oil channel 305, the annular oil channel 305 is connected to a distribution oil channel 304, the distribution oil channel 304 is connected to a connection port 303, the connection port 303 is located at the end away from the generator 207, the connection port 303 is rotatably sealed to an oil pipe 301, and the oil pipe 301 is connected to an oil pump 302.

[0047] In some optional specific embodiments, such as Figure 3 and Figure 4As shown, the filter cleaning channel includes a diversion pipe 104 connected to a drain pipe 103, with the interface located below the filter screen 1031. The filter screen 1031 can be flipped and installed in the drain pipe 103. A first valve 1032 is installed in the drain pipe 103 below the interface, and a second valve 1033 is installed in the diversion pipe 104. Multiple diversion pipes 104 are connected to a confluence pipe 105, which is connected to a discharge pipe 106. When a cleaning action is performed, the first valve 1032 closes, the second valve 1033 opens, and the filter screen 1031 flips. This allows water to flush away impurities attached to the filter screen 1031 and discharge them through the discharge pipe 106.

[0048] In some optional specific embodiments, such as Figure 5 As shown, the motorized water turbine includes two sets of primary water turbines 205 and two sets of secondary water turbines 206. Primary connecting plates 2051 are connected to the clutch assemblies on both sides of the primary water turbines 205. Primary threaded sleeves 2052 are installed on the primary connecting plates 2051. Primary threaded sleeves 2052 are threadedly connected to primary bidirectional lead screws 2053. The primary bidirectional lead screws 2053 and primary drive rods 2055 are integrally formed. A primary drive motor 2056 is connected to the end of the primary drive rod 2055. The secondary water turbines 206 are located on both sides... The clutch assembly is connected to a secondary connecting plate 2061, and a secondary threaded sleeve 2062 is installed on the secondary connecting plate 2061. The secondary threaded sleeve 2062 is threadedly connected to a secondary bidirectional lead screw 2063. The secondary bidirectional lead screw 2063 is integrally formed with a secondary drive rod 2064, and a secondary drive motor is connected to the end of the secondary drive rod 2064. The primary connecting plate 2051 is longer than the secondary connecting plate 2061, and the primary connecting plate 2051 is provided with a clearance hole 2054 for the secondary connecting plate 2061 to pass through. When the water level in the water storage container 101 reaches the primary water level, the drain pipe 103 of the corresponding primary water impeller 205 is opened, driving the clutch assemblies on both sides of the primary water impeller 205 to engage, so that the primary water impeller 205 works. The symmetrical arrangement ensures that the force on the main shaft 202 is always in a balanced state, reducing mechanical wear.

[0049] In some optional specific implementations, such as Figure 1 As shown, mounting brackets 501 are installed on both sides of the water turbine assembly 201, and bearing seats 203 are installed at both ends of the main shaft 202. The bearing seats 203 are installed on the mounting brackets 501. A control box 502 is also installed on the mounting brackets 501. A guide channel 503 is installed at the bottom of the mounting brackets 501 to guide the water flow out of the water turbine assembly 201.

[0050] In some optional specific embodiments, such as Figure 2As shown, the bottom of the water storage container 101 is provided with a water collection tank 102, and the drain pipe 103 is distributed in the water collection tank 102. The water collection tank 102 is used to guide the water flow to the drain pipe 103.

[0051] The working principle of this invention is as follows: A water storage container 101 is connected to a river channel, allowing water from the river to be introduced into the water storage container 101. The opening and closing frequency of the drainage pipe 103 is controlled according to the water level in the water storage container 101. When the water level is low, only the first valve 1032 in the drainage pipe 103 leading to the main water turbine 204 is opened, causing the main water turbine 204 to rotate under the impact of the water flow, thus driving the main shaft 202 to rotate. At this time, the clutch assembly of the motorized water turbine disengages, preventing the motorized water turbine from operating and rotating with the main shaft 202, thereby reducing the rotation speed of the main shaft 202. Regarding energy consumption, when the water level switch detects that the water level in the water storage container 101 has reached the level threshold, it opens the first valve 1032 of the corresponding drain pipe 103 to introduce water into the motorized water turbine. The motorized water turbine rotates under the impact of the water flow. A speed sensor is installed on the motorized water turbine to monitor its speed. When the speed reaches the engagement speed, that is, when the speed difference with the speed of the main shaft 202 is within the set threshold, the clutch assembly engages, so that the motorized water turbine rotates synchronously with the main shaft 202, reducing vibration during engagement and improving the stability of the water turbine assembly 201.

[0052] In operation, if the system is functioning normally, the main water turbine 204 and the motorized water turbine jointly drive the main shaft 202 to rotate. The pressure between the movable block 2023 and the moving groove is within a certain range, and the pressure inside the corresponding oil channel 306 is within a preset hydraulic threshold range. When the filter screen 1031 in the drain pipe 103 becomes clogged, the water flow in the drain pipe 103 will decrease. At this time, if the water flow corresponding to the motorized water turbine decreases, the impact of the water flow on the motorized water turbine will decrease, resulting in a decrease in its driving force. Therefore, its rotational speed may be less than the rotational speed of the main shaft 202 driven by the main water turbine 204. In this case, the main water turbine 204 will rotate faster than the main shaft 202. Shaft 202 drives the motorized water turbine to idle. At this time, the squeezing pressure between the movable block 2023 on the water-facing side and the moving trough decreases, making the pressure in the oil distribution channel 306 less than the hydraulic threshold range. Conversely, if the water flow corresponding to the main water turbine 204 decreases, the main water turbine 204 is driven to idle by the motorized water turbine, making the pressure in the oil distribution channel 306 greater than the hydraulic threshold range. This is used to simply locate and eliminate faults. If the specific fault point cannot be eliminated, an alarm is triggered and maintenance personnel handle and eliminate it. It can automatically resolve some faults. For faults that cannot be handled, the fault point can be preliminarily determined, improving the maintenance efficiency of maintenance personnel.

[0053] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the invention (including the claims) is limited to these examples; within the framework of the invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in the details for the sake of brevity.

[0054] This invention is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A river hydroelectric power generation system, comprising a water storage container (101), multiple drainage pipes (103), a turbine assembly (201), and a generator (207), wherein the water storage container (101) is connected to each drainage pipe (103), and the turbine assembly (201) is provided at the outlet of each drainage pipe (103); the turbine assembly (201) comprises a main shaft (202), a main turbine (204) fixedly installed at the center of the main shaft (202), and at least two motorized turbines symmetrically arranged on both sides of the main turbine (204) via bearings, characterized in that, Each of the drain pipes (103) is provided with a first valve (1032) that is controlled to open and close. The first valve (1032) is connected to a liquid level switch. The liquid level switch is used to monitor the water level in the water storage container (101) and control the opening and closing of the first valve (1032) according to the water level signal. Each motorized water turbine is provided with a clutch assembly on both sides. The clutch assembly is used to control the transmission connection state between the motorized water turbine and the main shaft (202) according to the water level signal. When the water level signal reaches the level threshold, the first valve (1032) of the corresponding drain pipe (103) is opened first, and the motorized water wheel is driven to rotate to the engagement speed. The clutch assembly is engaged, and the motorized water wheel rotates synchronously with the main shaft (202). When the water level signal does not reach the level threshold, the clutch assembly is disengaged, and the motorized water wheel is disengaged from the main shaft (202). The clutch assembly includes a fixed ring (2021) integrally formed with the main shaft (202) and located on both sides of the motorized water turbine. The fixed ring (2021) has multiple sets of protrusions (2022) arranged in a circumferential array. The clutch assembly also includes a movable sleeve (402) sleeved on the outer periphery of the fixed ring (2021). The movable sleeve (402) has a moving groove on its inner side that matches the protrusions (2022), so that the movable sleeve (402) can move axially and maintain circumferential linkage with the fixed ring (2021). The movable sleeve (402) is close to the motorized water turbine. One end of the waterwheel is provided with a friction plate (401), and the other end is connected to a connecting plate through a connecting bearing (403); a threaded sleeve is fixed to the end of the connecting plate, and the threaded sleeve and a double-acting screw form a threaded pair; when the double-acting screw rotates, it drives the connecting plates on both sides of the motorized waterwheel to move synchronously towards or away from each other, thereby driving the movable sleeve (402) and the friction plate (401) to move axially; when the two connecting plates move towards each other to a set position, the friction plate (401) presses against the side of the motorized waterwheel, realizing the transmission engagement between the motorized waterwheel and the main shaft (202).

2. The river hydroelectric power generation system according to claim 1, characterized in that, The drain pipe (103) is equipped with a filter screen (1031) and a filter screen cleaning channel. The side of the protrusion (2022) is connected to a movable block (2023) via a hydraulic push rod. The movable block (2023) is arranged on the water-facing side of the water turbine. The main shaft (202) is equipped with multiple oil passages (306) inside. Each oil passage (306) is connected to the corresponding hydraulic push rod and provides hydraulic pressure to it. Each oil passage (306) is equipped with an electronically controlled valve and a pressure sensor to monitor the oil pressure in the oil passage (306). When the pressure value detected by the pressure sensor is within the preset hydraulic threshold range, the system is determined to be operating normally; When the detected pressure value is lower than the preset hydraulic threshold range, it is determined that the motorized water turbine is malfunctioning and is in a state of idling driven by the main shaft (202). At this time, the filter cleaning channel is opened to perform a cleaning operation on the filter (1031) in the drain pipe (103) corresponding to the motorized water turbine. After cleaning, if the detected pressure returns to the preset hydraulic threshold range, the fault is determined to be resolved. Otherwise, the water turbine assembly (201) is determined to be faulty and a fault alarm signal is generated. If the pressure value detected by the pressure sensor is higher than the preset hydraulic threshold range, it is determined that the main water turbine (204) is malfunctioning and is in a state of idling driven by the main shaft (202). At this time, the cleaning channel is opened to clean the filter screen (1031) in the drain pipe (103) corresponding to the main water turbine (204). After cleaning, if the detected pressure returns to the preset hydraulic threshold range, it is determined that the fault is resolved. Otherwise, it is determined that the water turbine assembly (201) is faulty and a fault alarm signal is generated.

3. A river hydroelectric power generation system according to claim 2, characterized in that, The electrically controlled valve and the hydraulic sensor are electrically connected by a brush (307), and the brush (307) is electrically connected to a slip ring (308). The slip ring (308) is sleeved on the main shaft (202) and is connected to the electrical control system for supplying power and controlling the electrically controlled valve and the hydraulic sensor.

4. A river hydroelectric power generation system according to claim 2, characterized in that, The oil distribution channel (306) is connected to an annular oil channel (305), the annular oil channel (305) is connected to a distribution oil channel (304), the distribution oil channel (304) is connected to a connection port (303), the connection port (303) is located at the end away from the generator (207), the connection port (303) is rotatably sealed to an oil pipe (301), and the oil pipe (301) is connected to an oil pump (302).

5. A river hydroelectric power generation system according to claim 2, characterized in that, The filter cleaning channel includes a diversion pipe (104) connected to the drain pipe (103), with the interface located below the filter (1031). The filter (1031) can be flipped and installed in the drain pipe (103). A first valve (1032) is installed in the drain pipe (103) below the interface, and a second valve (1033) is installed in the diversion pipe (104). Multiple diversion pipes (104) are connected to a confluence pipe (105), and the confluence pipe (105) is connected to a discharge pipe (106). When the cleaning action is performed, the first valve (1032) is closed, the second valve (1033) is opened, and the filter (1031) is flipped.

6. A river hydroelectric power generation system according to claim 1, characterized in that, The motorized water turbine includes two sets of primary water turbines (205) and two sets of secondary water turbines (206). Primary connecting plates (2051) are connected to the clutch assemblies on both sides of the primary water turbines (205). Primary threaded sleeves (2052) are installed on the primary connecting plates (2051). Primary threaded sleeves (2052) are threadedly connected to primary double-acting screws (2053). The primary double-acting screws (2053) are integrally formed with a primary drive rod (2055). A primary drive motor (2056) is connected to the end of the primary drive rod (2055). The clutch assemblies on both sides of the secondary water turbines (206) are... The assembly is connected to a secondary connecting plate (2061), a secondary threaded sleeve (2062) is installed on the secondary connecting plate (2061), the secondary threaded sleeve (2062) is threaded to a secondary bidirectional lead screw (2063), the secondary bidirectional lead screw (2063) is integrally formed with a secondary drive rod (2064), the end of the secondary drive rod (2064) is connected to a secondary drive motor, the primary connecting plate (2051) is longer than the secondary connecting plate (2061), and the primary connecting plate (2051) is provided with a clearance hole (2054) for the secondary connecting plate (2061) to pass through.

7. A river hydroelectric power generation system according to claim 1, characterized in that, The turbine assembly (201) is equipped with mounting brackets (501) on both sides, and bearing seats (203) are installed at both ends of the main shaft (202). The bearing seats (203) are installed on the mounting brackets (501). A control box (502) is also installed on the mounting brackets (501). A guide channel (503) is installed at the bottom of the mounting brackets (501) to guide the water flow out of the turbine assembly (201).

8. A river hydroelectric power generation system according to claim 1, characterized in that, The water storage container (101) has a water collection tank (102) at the bottom, and the drain pipe (103) is distributed in the water collection tank (102). The water collection tank (102) is used to guide the water flow to the drain pipe (103).

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