Emergency water guide pump system based on self-rotating energy of water turbine

Abstract

The utility model provides a kind of emergency water guide pump system based on water turbine self-rotating kinetic energy, including water turbine unit big axle, stepless speed variator, electromagnetic clutch and centrifugal pump.Stepless speed variator input end is connected with water turbine unit big axle drive by electromagnetic clutch, output end is connected with centrifugal pump drive end.Oil inlet of centrifugal pump is connected with outer oil tank, oil outlet is connected with upper oil tank.When main water guide pump fails, start emergency system, signal is sent to electromagnetic clutch to establish power transmission path, adjust speed ratio by stepless speed variator, make centrifugal pump stabilize in demand speed interval, ensure lubricating oil supply.The utility model can effectively avoid water guide tile dry friction and tile burning accident caused by water guide pump failure, improve the safety and reliability of water turbine unit operation, reduce emergency shutdown time, guarantee power supply reliability.

Description

Technical Field

[0001] This utility model relates to the field of safety protection technology for hydropower equipment, and more specifically, to an emergency water pump system based on the self-rotation energy of a water turbine. Background Technology

[0002] In the field of hydropower plants, the stable operation of turbine units is crucial for the normal power supply and the lifespan of the units themselves. The water guide system, as a key component of the turbine unit, plays an indispensable role. Currently, shaftless water guide systems are widely used in many turbine units. In this type of system, the water guide bearings are in direct contact with the turbine's main shaft, playing a vital supporting and lubricating role.

[0003] A typical water-guided oil tank system includes an upper oil tank, a lower oil tank, and an outer oil tank. During normal operation, lubricating oil is drawn from the outer oil tank by a water-guided pump and transported to the upper oil tank. The water-guided bearings, located in the upper oil tank, are immersed in the lubricating oil, which forms an oil film between the bearings and the main shaft, providing lubrication and cooling. Due to the gaps between the main shaft and the oil tanks, the lubricating oil from the upper tank flows into the lower oil tank along these gaps, and then returns to the outer oil tank through specific pipelines. This cycle repeats continuously, ensuring the normal operation of the water-guided system.

[0004] Existing hydroelectric turbine units are typically equipped with two water guide pumps to improve operational stability; however, this configuration still has certain limitations. If both water guide pumps simultaneously lose power or malfunction, the lubricating oil in the outer oil tank cannot be pumped to the upper oil tank. This will trigger a series of serious consequences: the oil level in the upper tank will continuously drop, and when the oil level falls below the level sufficient to completely submerge the water guide bearings, the water guide bearings and the main shaft will lose their lubricating oil isolation effect, leading to dry friction. Dry friction causes the water guide bearing temperature to rise rapidly, resulting in serious mechanical accidents such as bearing burnout. This not only severely damages the water guide structure but may also further affect the operational safety of the entire turbine, significantly impacting the normal power generation of the power plant.

[0005] Currently, to address this situation, power plants generally adopt the measure of triggering an emergency shutdown procedure when both water pumps fail. However, the triggering time for this procedure can be as long as one minute. During this minute, the water pumping system remains in a dangerous state, potentially causing irreversible damage to the water pumping structure. Simultaneously, an emergency shutdown of the unit will severely impact the reliability of the power plant's power supply, adversely affecting the stable operation of the power grid. Utility Model Content

[0006] The present invention aims to solve at least one of the aforementioned technical problems existing in the prior art.

[0007] Therefore, this utility model provides an emergency water pump system based on the self-rotation energy of a water turbine.

[0008] This utility model provides an emergency water pump system based on the self-rotation energy of a water turbine, comprising:

[0009] The turbine shaft serves as the power input source.

[0010] A continuously variable transmission (CVT) has an input end and an output end. The input end of the CVT is connected to the main shaft of the turbine unit in an interruptible transmission manner. The CVT is used to adjust the speed of the power input from the input end and output it through the output end.

[0011] A centrifugal pump has a drive end, an oil inlet end, and an oil outlet end. The drive end of the centrifugal pump is connected to the output end of the continuously variable transmission. The oil inlet end of the centrifugal pump is connected to the first oil tank of the water-guided oil tank. The oil outlet end of the centrifugal pump is connected to the second oil tank of the water-guided oil tank. A water guide tile is installed in the second oil tank.

[0012] The emergency water pump system based on the self-rotation energy of a water turbine, according to the above-described technical solution of this utility model, may also have the following additional technical features:

[0013] In the above technical solution, the turbine shaft is fitted with a first gear, and the first gear rotates synchronously with the turbine shaft.

[0014] In the above technical solution, the emergency water pump system also includes an electromagnetic clutch, and the input end of the continuously variable transmission is connected to the first gear in an interruptible transmission manner through the electromagnetic clutch.

[0015] The electromagnetic clutch receives a start control signal to interrupt or establish a power transmission path between the input end of the continuously variable transmission and the first gear under the control of the start control signal.

[0016] In the above technical solution, the electromagnetic clutch includes:

[0017] The clutch input gear is connected to the first gear in a transmission connection.

[0018] The clutch output gear is connected to the input end of the continuously variable transmission (CVT).

[0019] The clutch input shaft is connected to the clutch input gear and rotates synchronously.

[0020] The clutch output shaft is connected to the clutch output gear and rotates synchronously.

[0021] The on / off control mechanism includes an iron core, an electromagnetic coil, a first friction plate fixedly connected to the clutch input shaft, and a second friction plate fixedly connected to the clutch output shaft; the on / off control mechanism realizes energization control of the electromagnetic coil according to the start control signal;

[0022] When the electromagnetic coil is energized, the first friction plate and the second friction plate are attracted to each other, so as to realize the synchronous rotation of the clutch input gear and the clutch output gear.

[0023] In the above technical solution, the continuously variable transmission includes:

[0024] The input shaft of the gearbox is a discontinuous transmission connection to the main shaft of the turbine unit;

[0025] An active cone disc assembly is fitted onto the input shaft of the transmission.

[0026] The output shaft of the transmission serves as the output end of the continuously variable transmission and is connected to the drive end of the centrifugal pump.

[0027] The driven cone disc assembly is sleeved on the output shaft of the transmission;

[0028] A continuously variable steel belt, wherein the driving cone disc assembly and the driven cone disc assembly are connected by a continuously variable steel belt;

[0029] The stepless change of the transmission ratio is achieved by adjusting the position of the continuously variable transmission steel belt on the cone disc.

[0030] In the above technical solution, the continuously variable transmission further includes:

[0031] The transmission input gear, serving as the input end of the continuously variable transmission, is fitted onto the transmission input shaft and rotates synchronously with it.

[0032] In the above technical solution, the active cone disk assembly includes:

[0033] The first fixed cone disc is fixedly mounted on the input shaft of the transmission.

[0034] The first movable cone disc is slidably mounted on the input shaft of the transmission. There is a first gap between the first fixed cone disc and the first movable cone disc to place the continuously variable transmission steel belt. The continuously variable transmission steel belt is respectively engaged and connected to the first fixed cone disc and the first movable cone disc.

[0035] A first driving device, connected to the first movable cone disk, is used to drive the first movable cone disk to slide relative to the first fixed cone disk on the transmission input shaft to change the first distance.

[0036] In the above technical solution, the driven cone disk assembly includes:

[0037] The second fixed cone disc is fixedly mounted on the output shaft of the transmission.

[0038] The second movable cone disc is slidably mounted on the output shaft of the transmission. There is a second gap between the second fixed cone disc and the second movable cone disc to place the continuously variable transmission steel belt. The continuously variable transmission steel belt is respectively engaged and connected with the second fixed cone disc and the second movable cone disc.

[0039] The second drive device, connected to the second movable cone, is used to drive the second movable cone to slide relative to the second fixed cone on the output shaft of the transmission, so as to change the second distance.

[0040] In the above technical solution, the speed ratio adjustment range of the continuously variable transmission is 1:5 to 1:15.

[0041] The above technical solution also includes:

[0042] An input shaft speed sensor is mounted on the transmission input shaft to monitor the transmission input shaft speed.

[0043] An output shaft speed sensor is mounted on the output shaft of the transmission to monitor the speed of the transmission output shaft.

[0044] In summary, due to the adoption of the above-mentioned technical features, the beneficial effects of this utility model are:

[0045] This patent proposes an emergency water guide pump system and its control method based on the self-rotational energy of a hydroelectric turbine. In the event of an external power failure of the water guide pump, the system utilizes the turbine's own rotational energy as a power source to supply water guide oil in an emergency. This improves the safety and reliability of the turbine unit's operation, reduces downtime caused by water guide pump failure, and minimizes the impact on the power plant's power supply reliability. It effectively solves the problem of water guide oil supply during external power failures, avoids mechanical accidents such as bearing burnout due to insufficient oil in the water guide bearings, ensures the safe and stable operation of the turbine unit, reduces the number of emergency shutdowns, lowers equipment wear, and improves the production efficiency and economic benefits of the hydroelectric power plant.

[0046] Specifically, in emergency situations such as external power failure of the water guide pump, the emergency water guide pump system can be started quickly, effectively avoiding serious accidents such as dry friction and bearing failure caused by interruption of water guide oil supply, providing strong protection for the safe operation of the turbine unit, reducing the number of emergency shutdowns of the unit, and extending the service life of the unit.

[0047] This invention reduces the risk of power outages by minimizing emergency shutdown time caused by water pump failures, improves the stability and reliability of power supply from power plants to the grid, helps maintain the normal operation of the grid, and reduces the losses to society and the economy caused by power outages.

[0048] This invention reduces the risk of equipment damage to the water-conducting system in emergency situations, lowering maintenance costs and equipment replacement expenses. Simultaneously, by improving unit utilization, it increases power generation and enhances the power plant's economic efficiency.

[0049] The emergency water pump system of this utility model is reasonably designed, which can make full use of the self-rotation energy of the water turbine to achieve efficient power transmission and speed ratio adjustment, meet the requirements of centrifugal pump speed under different working conditions, ensure the stability and reliability of emergency water supply, and has good promotion and application value.

[0050] Additional aspects and advantages of this invention will become apparent in the following description or may be learned by practice of this invention. Attached Figure Description

[0051] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0052] Figure 1 This is a perspective view of an emergency water pump system based on the self-rotation energy of a water turbine, according to an embodiment of this utility model.

[0053] in, Figure 1 The correspondence between the reference numerals and component names in the attached drawings is as follows:

[0054] 1. Turbine main shaft; 2. Continuously variable transmission (CVT); 3. Centrifugal pump; 4. Electromagnetic clutch; 5. Input shaft speed sensor; 6. Output shaft speed sensor;

[0055] 11. First gear;

[0056] 21. Gearbox input shaft; 22. Driven cone disc assembly; 23. Gearbox output shaft; 24. Driven cone disc assembly; 25. Continuously variable transmission (CVT) steel belt; 26. Gearbox input gear;

[0057] 221. First fixed cone disk; 222. First movable cone disk; 223. First driving device;

[0058] 31. Drive end; 32. Oil inlet end; 33. Oil outlet end;

[0059] 41. Clutch input gear; 42. Clutch output gear; 43. Clutch input shaft; 44. Clutch output shaft; 45. On / off control mechanism;

[0060] 451. Iron core; 452. Electromagnetic coil; 453. First friction plate; 454. Second friction plate. Detailed Implementation

[0061] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0062] Many specific details are set forth in the following description in order to provide 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 scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0063] The following reference Figure 1 This invention describes an emergency water pump system and its control method based on the self-rotation energy of a water turbine, according to some embodiments of the present invention.

[0064] Some embodiments of this application provide an emergency water pump system based on the self-rotation energy of a water turbine.

[0065] like Figure 1 As shown, the first embodiment of this utility model proposes an emergency water pump system based on the self-rotation energy of a water turbine, which includes at least a water turbine main shaft 1, a continuously variable transmission 2, and a centrifugal pump 3.

[0066] The turbine shaft 1 serves as the power input source and drives the centrifugal pump 3 when the external power source fails.

[0067] The continuously variable transmission (CVT) 2 has an input end and an output end. The input end of the CVT 2 is interruptibly connected to the turbine shaft 1. The CVT 2 is used to adjust the speed of the power input from the input end and output it through the output end. Specifically, the transmission between the input end of the CVT 2 and the turbine shaft 1 can be controlled by using a controllable mechanical device.

[0068] The centrifugal pump 3 has a drive end 31, an oil inlet end 32, and an oil outlet end 33. The drive end 31 of the centrifugal pump 3 is connected to the output end of the continuously variable transmission 2. The continuously variable transmission adjusts the rotational speed input to the drive shaft of the centrifugal pump 3 to meet the power requirements for pumping water-guided oil from the outer oil tank to the upper oil tank. The oil inlet end 32 of the centrifugal pump 3 is connected to the first oil tank of the water-guided oil tank, and the oil outlet end 33 of the centrifugal pump 3 is connected to the second oil tank of the water-guided oil tank. The second oil tank is equipped with water-guided bearings. It can be understood that in this disclosure, the first oil tank is the outer oil tank of the water-guided oil tank, and the second oil tank is the upper oil tank of the water-guided oil tank. The centrifugal pump 3 pumps the water-guided oil from the first oil tank to the second oil tank to lubricate the water-guided bearings.

[0069] It should be noted that water guide bearings are sliding bearing components used in equipment such as hydro-generator sets. Their main function is to bear the radial force of the turbine main shaft, keep the main shaft in a centered position, maintain the stable operation of the unit's main shaft within the bearing clearance range, reduce shaft axis error, and alleviate the unbalanced forces on rotating parts during unit operation. Their specific structure and the structure of the matching water guide oil tank are well known to those skilled in the art and will not be described in detail here.

[0070] In some embodiments, the turbine shaft 1 is fitted with a first gear 11, which rotates synchronously with the turbine shaft 1 and transmits power from the turbine shaft 1 to the outside through the first gear 11.

[0071] In some embodiments, the emergency water pump system further includes an electromagnetic clutch 4, and the input end of the continuously variable transmission 2 is interruptibly connected to the first gear 11 via the electromagnetic clutch 4; wherein the electromagnetic clutch 4 receives a start control signal to interrupt or establish the power transmission path between the input end of the continuously variable transmission 2 and the first gear 11 under the control of the start control signal.

[0072] In some embodiments, the electromagnetic clutch 4 includes a clutch input gear 41, a clutch output gear 42, a clutch input shaft 43, a clutch output shaft 44, and an on / off control mechanism 45.

[0073] The clutch input gear 41 is driven by the first gear 11; the clutch output gear 42 is driven by the input end of the continuously variable transmission 2; the clutch input shaft 43 is connected to the clutch input gear 41 and rotates synchronously; the clutch output shaft 44 is connected to the clutch output gear 42 and rotates synchronously; the on / off control mechanism 45 includes an iron core 451, an electromagnetic coil 452, a first friction plate 453 fixedly connected to the clutch input shaft 43, and a second friction plate 454 fixedly connected to the clutch output shaft 44; the on / off control mechanism 45 realizes the energization control of the electromagnetic coil 452 according to the start control signal; when the electromagnetic coil 452 is energized, the first friction plate 453 and the second friction plate 454 are attracted to achieve synchronous rotation of the clutch input gear 41 and the clutch output gear 42.

[0074] It should be noted that for the electromagnetic clutch 4, the start control signal is an external input signal. It can be manually input or automatically input after being generated by the PLC controller based on condition judgment. For example, when the dual pumps of the water guiding system fail and the oil pressure drops to the warning pressure, and when the turbine unit is in the start-up state, the start control signal instructs the controller of the electromagnetic clutch 4 to energize the electromagnetic coil 452.

[0075] In some embodiments, the continuously variable transmission 2 includes: a transmission input shaft 21, a driving cone disc assembly 22, a transmission output shaft 23, a driven cone disc assembly 24, a continuously variable steel belt 25, and a transmission input gear 26.

[0076] The transmission input shaft 21 is interruptibly connected to the turbine main shaft 1; the driving cone disc assembly 22 is sleeved on the transmission input shaft 21; the transmission output shaft 23 serves as the output end of the continuously variable transmission 2 and is connected to the drive end 31 of the centrifugal pump 3; the driven cone disc assembly 24 is sleeved on the transmission output shaft 23; the driving cone disc assembly 22 and the driven cone disc assembly 24 are connected by a continuously variable transmission steel belt 25; wherein, the stepless change of the transmission ratio is achieved by adjusting the position of the continuously variable transmission steel belt on the cone discs. The transmission input gear 26 serves as the input end of the continuously variable transmission 2, is sleeved on the transmission input shaft 21, and rotates synchronously with the transmission input shaft 21.

[0077] Specifically, the speed ratio adjustment of the continuously variable transmission 2 can be achieved by adjusting the driving cone plate group 22, the driven cone plate group 24, or both simultaneously. The driving cone plate group 22 and the driven cone plate group 24 can adopt the same structure. Figure 1 The illustrated embodiment uses the same structure for both as an example.

[0078] In some embodiments, the active cone disk assembly 22 includes a first fixed cone disk 221, a first movable cone disk 222, and a first drive device 223.

[0079] A first fixed cone disc 221 is fixedly mounted on the transmission input shaft 21; a first movable cone disc 222 is slidably mounted on the transmission input shaft 21, and a first gap exists between the first fixed cone disc 221 and the first movable cone disc 222 to accommodate the continuously variable transmission (CVT) belt 25, which is engaged with both the first fixed cone disc 221 and the first movable cone disc 222; a first drive device 223 is connected to the first movable cone disc 222 and is used to drive the first movable cone disc 222 to slide relative to the first fixed cone disc 221 on the transmission input shaft 21 to change the first gap.

[0080] In some embodiments, the driven cone disk assembly 24 includes a second fixed cone disk, a second movable cone disk, and a second driving device.

[0081] The second fixed cone disc is fixedly mounted on the transmission output shaft 23; the second movable cone disc is slidably mounted on the transmission output shaft 23, and there is a second gap between the second fixed cone disc and the second movable cone disc to place the continuously variable transmission steel belt 25. The continuously variable transmission steel belt 25 is engaged with the second fixed cone disc and the second movable cone disc respectively; the second drive device is connected to the second movable cone disc and is used to drive the second movable cone disc to slide relative to the second fixed cone disc on the transmission output shaft 23 to change the second gap.

[0082] The first drive unit 223 and the second drive unit can be driven by controllable hydraulic cylinders, motors, or other similar devices. When the speed ratio is adjusted solely by regulating the active cone disc assembly 22, the second drive unit can be omitted. Conversely, the first drive unit 223 can also be omitted.

[0083] Specifically, when the movable cone of the driving cone assembly 22 moves, it changes the radius of rotation of the steel belt on the driving cone assembly 22. Simultaneously, since the length of the steel belt is fixed, the movable cone of the driven cone assembly 24 moves in the opposite direction under the tension of the steel belt, thereby changing the transmission ratio and achieving stepless speed change. For example, when the movable cone of the driving cone assembly 22 moves closer to the fixed cone, increasing the radius of rotation of the steel belt on the driving cone assembly 22, the movable cone of the driven cone assembly 24 moves away from the fixed cone, decreasing the radius of rotation of the steel belt on the driven cone assembly 24 and reducing the transmission ratio. Conversely, when the movable cone of the driving cone assembly 22 moves away from the fixed cone and the movable cone of the driven cone assembly 24 moves closer to the fixed cone, the transmission ratio increases.

[0084] In some embodiments, the continuously variable transmission 2 has a speed ratio adjustment range of 1:5 to 1:15.

[0085] In some embodiments, the emergency water pump system further includes an input shaft speed sensor 5 and an output shaft speed sensor 6.

[0086] Input shaft speed sensor 5 is mounted on the input shaft 21 of the transmission to monitor the rotational speed of the input shaft 21; output shaft speed sensor 6 is mounted on the output shaft 23 of the transmission to monitor the rotational speed of the output shaft 23. Based on the data collected by the input shaft speed sensor 5 and the output shaft speed sensor 6, the cone-disc spacing can be flexibly adjusted, thereby ensuring that the final output speed of the centrifugal pump 3 remains within a reasonable range.

[0087] It should be noted that the emergency water-guided pump system based on the self-rotational energy of the turbine proposed in this disclosure can not only be used for water-guided oil supply in emergency situations, but also for water-guided oil supply under normal operating conditions in some cases. However, it should be noted that the system is not ready for operation before the unit is started. After the unit is running, it is put into operation using the turbine's own power. Specifically, after the turbine is running normally, the electromagnetic clutch can be activated, causing the main shaft to drive the transmission mechanism in the electromagnetic clutch. The transmission mechanism is connected to a continuously variable transmission (CVT), which adjusts the rotational speed input to the centrifugal pump 3 drive shaft to meet the power requirements for pumping water-guided oil from the outer oil tank to the upper oil tank, thereby realizing the circulating supply of water-guided oil.

[0088] This utility model provides a control method for an emergency water pump system based on the self-rotation energy of a water turbine. The method utilizes the emergency water pump system as described in any of the above embodiments to supply water and oil in case of an external power failure. The control method includes:

[0089] When the emergency mode is triggered by a dual failure of the main water pump, the emergency water pump system is activated.

[0090] After the emergency water pump system starts and monitors that the turbine main shaft 1 speed is ≥90% of the rated value, it sends a start control signal to the electromagnetic clutch 4 to open the electromagnetic clutch 4 to establish a power transmission path between the input end of the continuously variable transmission 2 and the first gear 11; specifically, it outputs 24V DC power to the electromagnetic coil 452 so that the friction plate completes the engagement within 200ms, establishes a power transmission path, and drives the input shaft of the continuously variable transmission 2 to rotate through the clutch output gear 42;

[0091] The speed ratio of the continuously variable transmission (CVT) 2 is dynamically adjusted according to the required speed range of the centrifugal pump 3, the speed of the input shaft 21 of the transmission, and the speed of the output shaft 23 of the transmission. Specifically, the CVT adjusts the distance between the cone discs through the first drive device 223 and / or the second drive device. At the same time, the output shaft speed sensor 6 feeds back the speed signal to the PLC. After calculation by the PID algorithm, the speed ratio is dynamically adjusted so that the speed of the centrifugal pump 3 is stabilized in the high-efficiency range of 1200-1500 rpm.

[0092] The speed of centrifugal pump 3 is stabilized within the required range so that the oil in the outer oil tank is drawn into the upper oil tank through the oil inlet 32 ​​of centrifugal pump 3.

[0093] When the speed of centrifugal pump 3 exceeds the safety threshold, the power transmission path between the input end of continuously variable transmission 2 and the first gear 11 is interrupted; specifically, when the speed exceeds the safety threshold of 1800 rpm, the mechanical overload clutch immediately cuts off the power transmission, and the PLC synchronously disconnects the power supply to the electromagnetic clutch, forming a dual protection.

[0094] In this specification, the illustrative expressions of the terms used do not necessarily refer to the same embodiments or examples. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0095] Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model shall be included within the protection scope of this utility model.

Claims

1. An emergency water guide pump system based on the self-rotating kinetic energy of a water turbine, characterized in that, include: The turbine shaft serves as the power input source. A continuously variable transmission (CVT) has an input end and an output end. The input end of the CVT is connected to the main shaft of the turbine unit in an interruptible transmission manner. The CVT is used to adjust the speed of the power input from the input end and output it through the output end. A centrifugal pump has a drive end, an oil inlet end, and an oil outlet end. The drive end of the centrifugal pump is connected to the output end of the continuously variable transmission. The oil inlet end of the centrifugal pump is connected to the first oil tank of the water-guided oil tank. The oil outlet end of the centrifugal pump is connected to the second oil tank of the water-guided oil tank. A water guide tile is installed in the second oil tank.

2. The emergency water guide pump system based on the self-rotating kinetic energy of a hydraulic turbine according to claim 1, characterized in that, The turbine shaft is fitted with a first gear, which rotates synchronously with the turbine shaft.

3. The emergency water guide pump system based on the self-rotating kinetic energy of a hydraulic turbine according to claim 2, characterized in that, The emergency water pump system also includes an electromagnetic clutch, and the input end of the continuously variable transmission is connected to the first gear in an interruptible transmission manner through the electromagnetic clutch. The electromagnetic clutch receives a start control signal to interrupt or establish a power transmission path between the input end of the continuously variable transmission and the first gear under the control of the start control signal.

4. The emergency water guide pump system based on the self-rotating kinetic energy of a hydraulic turbine according to claim 3, characterized in that, The electromagnetic clutch includes: The clutch input gear is connected to the first gear in a transmission connection. The clutch output gear is connected to the input end of the continuously variable transmission (CVT). The clutch input shaft is connected to the clutch input gear and rotates synchronously. The clutch output shaft is connected to the clutch output gear and rotates synchronously. The on / off control mechanism includes an iron core, an electromagnetic coil, a first friction plate fixedly connected to the clutch input shaft, and a second friction plate fixedly connected to the clutch output shaft; the on / off control mechanism realizes energization control of the electromagnetic coil according to the start control signal; When the electromagnetic coil is energized, the first friction plate and the second friction plate are attracted to each other, so as to realize the synchronous rotation of the clutch input gear and the clutch output gear.

5. The emergency water guide pump system based on the self-rotating kinetic energy of a hydraulic turbine according to claim 3, characterized in that, The continuously variable transmission includes: The input shaft of the gearbox is a discontinuous transmission connection to the main shaft of the turbine unit; An active cone disc assembly is fitted onto the input shaft of the transmission. The output shaft of the transmission serves as the output end of the continuously variable transmission and is connected to the drive end of the centrifugal pump. The driven cone disc assembly is sleeved on the output shaft of the transmission; A continuously variable steel belt, wherein the driving cone disc assembly and the driven cone disc assembly are connected by a continuously variable steel belt; The stepless change of the transmission ratio is achieved by adjusting the position of the continuously variable transmission steel belt on the cone disc.

6. The emergency water guide pump system based on the self-rotating kinetic energy of a hydraulic turbine according to claim 5, characterized in that, The continuously variable transmission also includes: The transmission input gear, serving as the input end of the continuously variable transmission, is fitted onto the transmission input shaft and rotates synchronously with it.

7. The emergency water guide pump system based on the self-rotating kinetic energy of a hydraulic turbine according to claim 5, characterized in that, The active cone disk assembly includes: The first fixed cone disc is fixedly mounted on the input shaft of the transmission. The first movable cone disc is slidably mounted on the input shaft of the transmission. There is a first gap between the first fixed cone disc and the first movable cone disc to place the continuously variable transmission steel belt. The continuously variable transmission steel belt is respectively engaged and connected to the first fixed cone disc and the first movable cone disc. A first driving device, connected to the first movable cone disk, is used to drive the first movable cone disk to slide relative to the first fixed cone disk on the transmission input shaft to change the first distance.

8. The emergency water guide pump system based on the self-rotating kinetic energy of a hydraulic turbine according to claim 5, characterized in that, The driven cone disk assembly includes: The second fixed cone disc is fixedly mounted on the output shaft of the transmission. The second movable cone disc is slidably mounted on the output shaft of the transmission. There is a second gap between the second fixed cone disc and the second movable cone disc to place the continuously variable transmission steel belt. The continuously variable transmission steel belt is respectively engaged and connected with the second fixed cone disc and the second movable cone disc. The second drive device, connected to the second movable cone, is used to drive the second movable cone to slide relative to the second fixed cone on the output shaft of the transmission, so as to change the second distance.

9. The emergency water guide pump system based on the self-rotating kinetic energy of a hydraulic turbine according to claim 5, characterized in that, The continuously variable transmission has a speed ratio adjustment range of 1:5 to 1:

15.

10. The emergency water guide pump system based on the self-rotating kinetic energy of a hydraulic turbine according to claim 5, characterized in that, Also includes: An input shaft speed sensor is mounted on the transmission input shaft to monitor the transmission input shaft speed. An output shaft speed sensor is mounted on the output shaft of the transmission to monitor the speed of the transmission output shaft.

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