Hydroelectric double-drive device, complementary energy generator set and cooling tower

Abstract

The utility model relates to the technical field of hydraulic conversion, in particular to a hydroelectric double-drive device, a complementary energy generator set and a cooling tower. The hydroelectric double-drive device and the complementary energy generator set comprise a water turbine, a permanent magnet synchronous motor and a hydroelectric generator, a water inlet pipe and a water outlet pipe are arranged on the water turbine, and the water outlet pipe is communicated with a water distribution pipe in the cooling tower; an output shaft of the water turbine drives a spindle of the permanent magnet synchronous motor to rotate; the output end of the permanent magnet synchronous motor spindle is connected with the transmission shaft; the cooling tower comprises the water and electricity double-drive device and a complementary energy generator set and further comprises a tower body. The top of the tower body is provided with an air duct, a speed reducer and a fan are arranged in the air duct, an output shaft of the speed reducer is connected with the fan and drives the fan to rotate, and the transmission shaft is connected with the speed reducer in the air duct. The device has the advantages that kinetic energy of circulating backwater is converted to drive the cooling tower fan to operate, the hydroelectric generator can be switched to be driven to generate power in cold winter, waste of surplus kinetic energy of circulating water is reduced, electricity cost is saved, and power generation benefits are generated.

Description

Technical Field

[0001] This application relates to the technical field of power conversion of surplus water in circulating return water, and in particular to a hydroelectric dual-drive device, a waste energy generator set, and a cooling tower. Background Technology

[0002] In industrial cooling water circulation systems, traditional medium and large-sized cooling tower fans typically operate using a motor (purely electric power) – long drive shaft – reducer. The cooling tower fan motor operates continuously, consuming large amounts of electricity and generating consistently high electricity costs. The circulating return water, after being distributed through the water distribution pipes and sprayed into the cooling tower, falls through the packing channels for heat exchange and cooling. However, the "excess kinetic energy" of this circulating return water is released at the outlet plane of the water distribution nozzles (where the nozzles are in contact with the atmosphere) and is wasted. Therefore, how to utilize the excess kinetic energy of the circulating return water in the cooling tower fans is a pressing issue that needs to be addressed. Utility Model Content

[0003] In order to utilize the surplus kinetic energy of the circulating water to the cooling tower fan, reduce the waste of surplus water kinetic energy, save electricity costs, and generate electricity revenue, this application provides a water-electric dual-drive device, a waste energy generator set, and a cooling tower.

[0004] In the first aspect, the hydroelectric dual-drive device and waste heat generator set provided in this application adopt the following technical solution:

[0005] A hydroelectric dual-drive device and a waste heat generator set include a water turbine and a permanent magnet synchronous motor. The water turbine is equipped with an inlet pipe and an outlet pipe, and the outlet pipe is connected to a water distribution pipe in a cooling tower. The output shaft of the water turbine drives the main shaft of the permanent magnet synchronous motor to rotate. The output end of the main shaft of the permanent magnet synchronous motor is connected to the drive shaft of the cooling tower.

[0006] By adopting the above technical solution, when the cooling tower fan needs to rotate, there are three driving methods:

[0007] 1. Sufficient hydrodynamic energy: The fan is driven by the permanent magnet synchronous motor, drive shaft, and reducer inside the cooling tower only when the water turbine is running. The drive shaft and reducer inside the cooling tower are components within the cooling tower. (Note that when only the water turbine is running, the permanent magnet synchronous motor shaft is "idling," equivalent to a drive shaft. At this time, the permanent magnet synchronous motor does not consume electricity, does not generate electricity, and does not produce resistance.)

[0008] 2. It has water power, but it is insufficient: When the water turbine is working, the permanent magnet synchronous motor is energized to generate rotational torque, which drives the fan through the transmission shaft and the reducer inside the wind tunnel by means of "water power + compensating electrical energy".

[0009] 3. No water power: The permanent magnet synchronous motor (pure electric power) runs, and drives the fan through the transmission shaft and the reducer inside the air duct.

[0010] This invention utilizes a water turbine to convert the surplus energy (hydrodynamic energy) of the circulating water into mechanical energy to drive the cooling tower fan, thus replacing the traditional electric motor (pure electrical energy) used to drive the fan and achieving energy saving and consumption reduction. However, if the surplus energy of the circulating water is low and the ambient temperature is high (especially in hot summer weather), simply using a water turbine to drive the fan (low speed, small airflow) is insufficient to raise the cooling tower outlet water temperature to meet production process requirements. In this case, external power (differential power) is needed to increase the fan speed and airflow. This application utilizes a combination of hydrodynamic energy and compensated electrical energy to drive the cooling tower fan. This effectively converts and applies the surplus kinetic energy of the circulating water to the cooling tower fan, reducing the waste of surplus hydrodynamic energy and saving on electricity costs.

[0011] Optionally, it also includes a flexible coupling, a speed increaser, and a hydroelectric generator, wherein the speed increaser is a one-input, two-output type; the output shaft of the turbine is connected to the input end of the speed increaser through the flexible coupling, and the two output ends of the speed increaser are respectively connected to the main shaft of the permanent magnet synchronous motor and the input shaft of the hydroelectric generator.

[0012] Optionally, it also includes a first switching device and a second switching device; one output end of the speed increaser is connected to the main shaft of the permanent magnet synchronous motor through the first switching device, and the other output end is connected to the input shaft of the hydroelectric generator through the second switching device.

[0013] By adopting the above technical solution, in cold winter weather, the wind turbine can be slowed down or shut down. At this time, the excess water kinetic energy is converted into power to drive a hydroelectric generator for grid connection. When the wind turbine needs to be slowed down or shut down, a lower water energy can be used to drive the wind turbine to rotate at a low speed; or the wind turbine can be shut down without allocating water kinetic energy. By disconnecting the first on / off device and keeping the second on / off device in the on state, the water kinetic energy is maximized to drive the hydroelectric generator for power generation, achieving grid connection.

[0014] Optionally, the inlet pipe is equipped with a first inlet valve, the outlet pipe is equipped with an outlet valve, and a tower bypass pipe is provided connecting the inlet pipe and the outlet pipe, with a first bypass valve provided on the tower bypass pipe.

[0015] By adopting the above technical solution, when the hydroelectric dual-drive device and the residual energy generator set need to be maintained, the first inlet valve and outlet valve are closed, and the first bypass valve is opened, so that the circulating water does not flow through the turbine, thus achieving water cut-off maintenance.

[0016] Optionally, the first inlet valve, the outlet valve, and the first bypass valve are all electric valves.

[0017] Optionally, it also includes an intelligent control cabinet, wherein the first on / off device, the second on / off device, the first inlet valve, the outlet valve and the first bypass valve are all electrically connected to the intelligent control cabinet.

[0018] By adopting the above technical solution, the intelligent control cabinet will include a frequency converter specifically for the start-stop and speed regulation control of the permanent magnet synchronous motor. The intelligent control cabinet will also have an automatic synchronizing device specifically for solving the grid connection problem of the hydroelectric generator. The intelligent control cabinet is also equipped with an industrial PLC for collecting and displaying the unit's operating status data and uploading it to the DCS. It also includes a control system for the on / off devices, and control systems for the first inlet valve, outlet valve, and first bypass valve. The relevant structures of the above intelligent control cabinet are all existing technologies and can be configured according to actual conditions. Through the configuration of the intelligent control cabinet, each part automatically cooperates, resulting in high efficiency and reliability.

[0019] Optionally, a bypass water supply pipe is connected to the side wall of the water inlet pipe, and the end of the bypass water supply pipe away from the water inlet pipe is connected to the water distribution pipe in the cooling tower; a second water inlet valve is provided on the water inlet pipe, and the second water inlet valve is closer to the first water inlet valve than the connection between the bypass water supply pipe and the water inlet pipe, and a second bypass valve is provided on the bypass water supply pipe.

[0020] By adopting the above technical solution, a unit is formed by combining a permanent magnet synchronous motor, a water turbine, and a hydroelectric generator. In practice, the unit is installed outside the cooling tower's top duct, higher than the water distribution system plane inside the cooling tower. If the system's return water pressure is low, driving the water turbine at the top of the tower and raising the water head may reduce the circulating water volume. However, in hot summer weather, the production process does not allow for a reduction in the circulating water volume. Therefore, through the design of this application, the second bypass valve can be opened at this time, while the second inlet valve, outlet valve, and first bypass valve are closed, allowing return water to enter the water distribution pipe inside the cooling tower without reaching the water turbine at the top of the tower (restoring the circulating water operation state). The first and second on / off devices are automatically disconnected. At this time, the speed increaser and water turbine remain stationary, and the intelligent control cabinet supplies power to the permanent magnet synchronous motor. The permanent magnet synchronous motor rotates, driving the fan inside the duct to operate at high speed and high air volume via the drive shaft, solving the cooling tower cooling problem. The permanent magnet synchronous motor (pure electric power) can drive the fan at its rated high speed or operate with stepless speed regulation.

[0021] Secondly, this application provides a cooling tower, which adopts the following technical solution:

[0022] A cooling tower includes the aforementioned hydroelectric dual-drive device and a waste heat generator set.

[0023] Optionally, it also includes a tower body, with the hydroelectric dual-drive device and the waste energy generator set located outside the top of the tower body; a wind duct is installed on the top of the tower body, and a reducer, a fan and a drive shaft are installed inside the wind duct. The output shaft of the reducer is connected to the fan and drives the fan to rotate, and the end of the drive shaft away from the permanent magnet synchronous motor is connected to the reducer; a water distribution pipe, a water distribution nozzle and a water spraying packing are arranged sequentially from top to bottom inside the tower body.

[0024] By adopting the above technical solution, the water from the turbine enters the water distribution pipe inside the tower and is sprayed downwards through the water distribution nozzles, spreading and flowing through the water-spraying packing. The fan operates to draw dry and cold air into the tower, which flows upwards through the packing channel and undergoes contact heat transfer with the water flow, thereby cooling the circulating water. The circulating water then falls to the water pool at the bottom of the cooling tower and is then pumped to the heat exchanger for use. The water from the heat exchanger (circulating return water, hot water) enters the turbine through the return water header and the inlet water pipe to participate in the circulation.

[0025] In summary, this application includes at least the following beneficial technical effects:

[0026] The cooling tower fan is driven by a water turbine, a one-in-two-out speed increaser, a first on / off device, and a permanent magnet synchronous motor in conjunction with an intelligent control cabinet equipped with a frequency converter (automatic speed regulation). While ensuring that the cooling tower meets the production process requirements throughout the year, it continuously saves energy and reduces consumption. When the ambient temperature is too low in winter, the fan stops running, the first on / off device is disconnected, and the water turbine, the one-in-two-out speed increaser, the second on / off device, and a professional hydroelectric generator in conjunction with automatic synchronization and intelligent control cabinet output clean electrical energy to be connected to the power grid, thereby continuously generating economic benefits. Compared with the traditional cooling tower pure electric fan operation, this application has a simpler process, reduces labor costs, and generates economic benefits in all four seasons. Attached Figure Description

[0027] Figure 1 This is a side view of the cooling tower in an embodiment of this application.

[0028] Figure 2 This is a schematic diagram illustrating the structure of the water distribution pipe in an embodiment of this application.

[0029] Figure 3 This is a top view of the ventilation duct in an embodiment of this application.

[0030] Figure 4 This is a side view of the hydroelectric dual-drive device and the waste heat generator set in the embodiments of this application.

[0031] Figure 5 This is a top view of the hydroelectric dual-drive device and the waste energy generator set in this application.

[0032] Figure 6 This is a layout diagram of the hydroelectric dual-drive device and the waste heat generator set in the embodiments of this application.

[0033] Explanation of reference numerals in the attached drawings: 1. Inlet pipe; 2. First inlet valve; 3. Turbine; 4. Flexible coupling; 5. Speed ​​increaser; 6. First on / off device; 7. Permanent magnet synchronous motor; 8. Second on / off device; 9. Hydroelectric generator; 10. Common base; 11. Intelligent control cabinet; 12. Drive shaft; 13. Reducer; 14. Fan; 15. Air duct; 16. Outlet elbow; 17. Outlet valve; 18. Outlet pipe; 19. Tower bypass pipe; 20. First bypass valve; 21. Bypass water supply pipe; 22. Second bypass valve; 23. Second inlet valve; 24. Tower body; 25. Water distribution pipe; 26. Sprinkler packing. Detailed Implementation

[0034] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.

[0035] In a first aspect, embodiments of this application disclose a hydroelectric dual-drive device and a waste heat generator set. (Refer to...) Figure 1-3 The hydroelectric dual-drive device and waste heat generator set include a water turbine 3 and a permanent magnet synchronous motor 7. The water turbine 3 is equipped with an inlet pipe 1 and an outlet pipe 18. One end of the outlet pipe 18 is connected to the water turbine 3 through an outlet bend 16, and the other end of the outlet pipe 18 is connected to the water distribution pipe 25 in the cooling tower. The output shaft of the water turbine 3 is used to drive the main shaft of the permanent magnet synchronous motor 7 to rotate. The output end of the main shaft of the permanent magnet synchronous motor 7 is connected to the drive shaft 12 of the cooling tower.

[0036] When the cooling tower fan 14 needs to rotate, it includes three driving methods:

[0037] 1. Sufficient hydrodynamic energy: Only when the water turbine 3 is running, the fan 14 is driven by the permanent magnet synchronous motor 7, the drive shaft 12, and the reducer 13 inside the fan duct 15. The drive shaft 12 and the reducer 13 inside the fan duct 15 are components inside the cooling tower. (Note that when only the water turbine 3 is running, the shaft of the permanent magnet synchronous motor 7 is "idling," which is equivalent to one drive shaft 12. At this time, the permanent magnet synchronous motor 7 does not consume electricity, does not generate electricity, and does not generate resistance.)

[0038] 2. It has water power, but it is insufficient: When the water turbine 3 is working, the permanent magnet synchronous motor 7 is energized to generate rotational torque. Through the method of "water power + compensation electrical energy", the fan 14 is driven to run through the transmission shaft 12 and the reducer 13 inside the wind tunnel 15.

[0039] 3. No water power: The permanent magnet synchronous motor 7 (pure electric power) runs, and drives the fan 14 through the transmission shaft 12 and the reducer 13 inside the air duct 15.

[0040] The water turbine 3 converts the surplus energy and kinetic energy of the circulating water into mechanical energy to drive the cooling tower fan 14, thus replacing the traditional electric motor (pure electrical energy) driving the fan 14 on the cooling tower, achieving energy saving and consumption reduction. If the surplus energy of the circulating water is low and the ambient temperature is high (high temperatures in summer), simply driving the fan 14 with the water turbine 3 (low speed, small air volume) is insufficient to raise the cooling tower outlet water temperature to the production process requirements. In this case, external power (differential power) is needed to increase the fan 14 speed and increase the air volume. This application can drive the cooling tower fan 14 using a combination of "water kinetic energy + compensated electrical energy." This effectively converts and utilizes the surplus kinetic energy of the circulating water in the cooling tower fan 14, reducing the waste of surplus water kinetic energy and saving electricity costs.

[0041] Reference Figure 3-5 The hydroelectric dual-drive device and waste heat generator set also include a flexible coupling 4, a speed increaser 5, a hydroelectric generator 9, a first on / off device 6, and a second on / off device 8. The speed increaser 5 is a one-in-two-out type. The output shaft of the turbine 3 is connected to the input end of the speed increaser 5 through the flexible coupling 4. The two output ends of the speed increaser 5 are respectively connected to the main shaft of the permanent magnet synchronous motor 7 and the input shaft of the hydroelectric generator 9. One output end of the speed increaser 5 is connected to the main shaft of the permanent magnet synchronous motor 7 through the first on / off device 6, and the other output end is connected to the input shaft of the hydroelectric generator 9 through the second on / off device 8.

[0042] In cold winter weather, the wind turbine 14 can be slowed down or shut down. In this case, the water kinetic energy is converted to drive the hydroelectric generator 9 to generate electricity and achieve grid connection. When the wind turbine 14 needs to be slowed down or shut down, a lower water energy is used to drive the wind turbine 14 to rotate at a low speed; or the wind turbine 14 can be shut down without water kinetic energy allocation. This can be achieved by disconnecting the first switching device 6 and keeping the second switching device 8 in the connected state. In this case, the water kinetic energy is maximized to drive the hydroelectric generator 9 to generate electricity and achieve grid connection.

[0043] Reference Figure 1-2 and Figure 5 The inlet pipe 1 is equipped with a first inlet valve 2, and the outlet pipe 18 is equipped with an outlet valve 17. A bypass pipe 19 is connected between the inlet pipe 1 and the outlet pipe 18, and a first bypass valve 20 is installed on the bypass pipe 19. When the hydroelectric dual-drive unit and the residual energy generator set need to be maintained, the first inlet valve 2 and the outlet valve 17 are closed, and the first bypass valve 20 is opened. The circulating water will not flow through the turbine 3, thus achieving water cut-off maintenance.

[0044] Reference Figure 5The hydroelectric dual-drive unit and waste heat generator set also include an intelligent control cabinet 11. The first inlet valve 2, outlet valve 17, and first bypass valve 20 are all electric valves. The first on / off device 6, second on / off device 8, first inlet valve 2, outlet valve 17, and first bypass valve 20 are all electrically connected to the intelligent control cabinet 11. The intelligent control cabinet 11 includes a frequency converter specifically for the start / stop and speed regulation control of the permanent magnet synchronous motor 7. The intelligent control cabinet 11 also includes an automatic synchronizing device specifically for solving the grid connection problem of the hydroelectric generator 9. The intelligent control cabinet 11 also houses an industrial PLC for collecting and displaying the unit's operating status data and uploading it to the DCS. It also includes control systems for the on / off devices, the first inlet valve 2, outlet valve 17, and the first bypass valve 20. The aforementioned structure of the intelligent control cabinet 11 is all existing technology and can be configured according to actual conditions. Through the configuration of the intelligent control cabinet 11, each part automatically cooperates, resulting in high efficiency and reliability.

[0045] Reference Figure 1-3 and Figure 5 A bypass water supply pipe 21 is connected to the side wall of the water inlet pipe 1. The end of the bypass water supply pipe 21 away from the water inlet pipe 1 is connected to the water distribution pipe 25 in the cooling tower. A second water inlet valve 23 is provided on the water inlet pipe 1. The second water inlet valve 23 is closer to the first water inlet valve 2 than the connection between the bypass water supply pipe 21 and the water inlet pipe 1. A second bypass valve 22 is provided on the bypass water supply pipe 21.

[0046] The permanent magnet synchronous motor 7, water turbine 3, and hydroelectric generator 9 are combined to form a unit. In practice, the unit is installed outside the cooling tower's top duct 15, higher than the water distribution system plane inside the cooling tower. If the system's return water pressure is low, driving the water turbine 3 at the top of the tower and raising the water head may reduce the circulating water volume. However, in hot summer weather, the production process does not allow for a reduction in the circulating water volume. Therefore, through the design of this application, the second bypass valve 22 can be opened at this time, while the second inlet valve 23, outlet valve 17, and first bypass valve 20 are closed, allowing return water to enter the cooling tower's water distribution pipe 25 without reaching the top water turbine 3 (restoring the circulating water operation state). The first on / off device 6 and the second on / off device 8 are automatically disconnected. At this time, the speed increaser 5 and water turbine 3 remain stationary. The intelligent control cabinet 11 supplies power to the permanent magnet synchronous motor 7, and the output shaft of the permanent magnet synchronous motor 7 drives the fan 14 inside the duct 15 to operate at high speed and high air volume via the transmission shaft 12, solving the cooling tower cooling problem. The permanent magnet synchronous motor 7 (pure electric) can drive the fan 14 to run at rated high speed, or it can run with stepless speed regulation.

[0047] Secondly, this application discloses a cooling tower, which adopts the following technical solution:

[0048] Reference Figure 1-3The cooling tower includes the aforementioned common base 10, a water-electric dual-drive device and a waste heat generator set, and a tower body 24. The water-electric dual-drive device and the waste heat generator set are installed on the common base 10 at the top of the tower body 24. The common base 10 is fixedly installed outside the air duct 15. The air duct 15 is installed at the top of the tower body 24. A reducer 13, a fan 14, and a drive shaft 12 are installed inside the air duct 15. The output shaft of the reducer 13 is connected to the fan 14 to drive the rotation of the fan 14. The end of the drive shaft 12 away from the permanent magnet synchronous motor 7 is connected to the reducer 13. Water distribution pipes 25 and water spraying packing 26 are arranged sequentially from top to bottom inside the tower body 24. Water from turbine 3 enters the water distribution pipe 25 inside the tower and is sprayed downwards through the water distribution nozzles, spreading and flowing through the water-spraying packing. The fan operates to draw dry and cold air into the tower, which flows upwards through the packing channel and undergoes contact heat transfer with the water flow, thus cooling the circulating water. The circulating water then falls to the water pool at the bottom of the cooling tower and is then pumped to the heat exchanger for use. The water from the heat exchanger (circulating return water, hot water) enters turbine 3 through the return water header and inlet pipe 1 to participate in the circulation.

[0049] The implementation principle of the hydro-electric dual-drive device and waste heat generator set in this application embodiment is as follows: The entire unit is installed outside the cooling tower top duct 15. A fan 14 and a reducer 13 are installed inside the cooling tower top duct 15. A long drive shaft 12 passes through the duct 15, connecting one end to the internal reducer 13 and the other end to the permanent magnet synchronous motor 7 of the unit outside the duct 15. This hydro-electric dual-drive device and waste heat generator set includes a water turbine 3, a one-in-two-out speed increaser 5, a first on / off device 6, a second on / off device 8, a permanent magnet synchronous motor 7, a hydro generator 9, and an intelligent control cabinet 11. The unit layout is as follows: Figure 6 .

[0050] Unit Operation Mode 1: During the cool spring and autumn seasons, the circulating water enters the turbine 3 at the top of the cooling tower. After being accelerated by the speed increaser 5, the first on / off device 6 automatically engages under the control of the intelligent control cabinet 11 (the second on / off device 8 automatically disconnects, and the generator remains stationary). The water then drives the long transmission shaft 12 via the shaft of the permanent magnet synchronous motor 7 (which is not energized, consumes no electricity, and does not generate electricity, remaining in an idling state). This ultimately drives the reducer 13 and fan 14 within the air duct 15. Water from the turbine 3 flows downwards into the water distribution pipe 25 inside the cooling tower. Only the surplus energy from the system's return water drives the cooling tower fan 14, achieving energy saving (zero power consumption) while ensuring that the system's water volume and cooling tower cooling effect meet production needs.

[0051] Unit Operation Mode 2: In hot summer weather, if "Operation Mode 1" is used, and the excess return water is insufficient, the speed and air volume of fan 14 will be low. At this time, based on the water temperature monitoring data at the cooling tower outlet, the intelligent control cabinet 11 sends power to the permanent magnet motor via the frequency converter. The output torque of the permanent magnet synchronous motor 7 automatically combines with the output of the water turbine 3. The two forces work together to drive the fan 14 in the air duct 15 to operate at high speed and with a large air volume, meeting the cooling tower's cooling needs (operating only in hot weather, for a short time, with minimal power replenishment) to achieve energy saving. At the same time, the frequency and speed of the permanent magnet synchronous motor 7 can be automatically adjusted to keep the fan speed (air volume) and the cooling tower outlet water temperature in optimal matching state, maximizing energy saving benefits.

[0052] Unit Operation Mode 3: Because the water-electric dual-drive unit and the waste heat generator are installed outside the cooling tower top duct 15, higher than the water distribution system plane inside the cooling tower, if the system return water pressure is low, the water turbine 3 driven at the top of the tower will run, raising the water head and potentially reducing the circulating water volume. In hot summer weather, the production process does not allow for a reduction in the circulating water volume. At this time, the second bypass valve 22 at the bottom of the tower is opened, and the return water enters the water distribution pipe 25 inside the cooling tower without the water turbine 3 at the top of the tower (restoring the circulating water operation state). The first on / off device 6 and the second on / off device 8 are both automatically disconnected (the speed increaser 5 and the water turbine 3 remain stationary). The intelligent control cabinet 11 supplies power to the permanent magnet synchronous motor 7 via the frequency converter. The output torque of the permanent magnet motor drives the fan 14 inside the duct 15 to run at high speed and high volume via the long transmission shaft 12, solving the cooling tower cooling problem. The permanent magnet synchronous motor 7 (pure electric) can drive the fan 14 to run at its rated high speed.

[0053] Unit operation mode 4: In cold winter weather, the cooling tower fan 14 can be stopped (when multiple cooling towers are connected in parallel in the same circulating water system, 1, 2, ... multiple towers can be stopped), the first on / off device 6 is automatically disconnected (the permanent magnet synchronous motor 7, drive shaft 12, and reducer 13 stop rotating), the second on / off device 8 is automatically engaged, and the output of the water turbine 3 drives the hydroelectric generator 9 through the speed increaser 5 and the second on / off device 8. The generated electricity is sent to the intelligent control cabinet 11 and connected to the grid after automatic synchronization and other adjustments.

[0054] This hydroelectric dual-drive and nine hydroelectric generator sets are assembled and commissioned units, installed and fixed on the same common base 10. The equipment and base are installed as a whole outside the tower top wind tunnel 15. The structure is compact, convenient for construction, and easy to inspect. Lubricating grease can be added to the unit without stopping the machine.

[0055] The unit automatically switches between providing power to drive the wind turbine 14 for operation and generating electricity for grid connection, simplifying procedures and reducing labor costs.

[0056] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A hydroelectric dual-drive device and a waste heat generator set, characterized in that: It includes a water turbine (3) and a permanent magnet synchronous motor (7). The water turbine (3) is equipped with an inlet pipe (1) and an outlet pipe (18). The outlet pipe (18) is connected to the water distribution pipe (25) in the cooling tower. The output shaft of the water turbine (3) drives the main shaft of the permanent magnet synchronous motor (7) to rotate. The output end of the main shaft of the permanent magnet synchronous motor (7) is connected to the drive shaft (12) of the cooling tower.

2. The hydroelectric dual-drive device and waste heat generator set according to claim 1, characterized in that: It also includes a flexible coupling (4), a speed increaser (5) and a hydroelectric generator (9). The speed increaser (5) is a one-in-two-out type. The output shaft of the water turbine (3) is connected to the input end of the speed increaser (5) through the flexible coupling (4). The two output ends of the speed increaser (5) are respectively connected to the main shaft of the permanent magnet synchronous motor (7) and the input shaft of the hydroelectric generator (9).

3. The hydroelectric dual-drive device and waste heat generator set according to claim 2, characterized in that: It also includes a first switching device (6) and a second switching device (8); one output end of the speed increaser (5) is connected to the main shaft of the permanent magnet synchronous motor (7) through the first switching device (6), and the other output end is connected to the input shaft of the hydroelectric generator (9) through the second switching device (8).

4. The hydroelectric dual-drive device and waste heat generator set according to claim 3, characterized in that: The inlet pipe (1) is provided with a first inlet valve (2), the outlet pipe (18) is provided with an outlet valve (17), the inlet pipe (1) and the outlet pipe (18) are connected by a tower bypass pipe (19), and the tower bypass pipe (19) is provided with a first bypass valve (20).

5. The hydroelectric dual-drive device and waste heat generator set according to claim 4, characterized in that: The first inlet valve (2), the outlet valve (17), and the first bypass valve (20) are all electric valves.

6. The hydroelectric dual-drive device and waste heat generator set according to claim 5, characterized in that: It also includes an intelligent control cabinet (11), wherein the first on / off device (6), the second on / off device (8), the first inlet valve (2), the outlet valve (17) and the first bypass valve (20) are all electrically connected to the intelligent control cabinet (11).

7. A hydroelectric dual-drive device and a waste heat generator set according to any one of claims 1-5, characterized in that: A bypass water supply pipe (21) is connected to the side wall of the water inlet pipe (1). The end of the bypass water supply pipe (21) away from the water inlet pipe (1) is connected to the water distribution pipe (25) in the cooling tower. A second water inlet valve (23) is provided on the water inlet pipe (1). The second water inlet valve (23) is closer to the first water inlet valve (2) than the connection between the bypass water supply pipe (21) and the water inlet pipe (1). A second bypass valve (22) is provided on the bypass water supply pipe (21).

8. A cooling tower, characterized in that: Includes the hydroelectric dual-drive device and the waste energy generator set as described in any one of claims 1-7.

9. A cooling tower according to claim 8, characterized in that: It also includes a tower body (24), and the hydroelectric dual-drive device and the waste energy generator set are installed on the top of the tower body (24); a wind duct (15) is installed on the top of the tower body (24), and a reducer (13), a fan (14) and a drive shaft (12) passing through the wind duct are installed inside the wind duct (15). The output shaft of the reducer (13) is connected to the fan (14) and drives the fan (14) to rotate. The end of the drive shaft (12) away from the permanent magnet synchronous motor (7) is connected to the reducer (13); a water distribution pipe (25) and a water spraying filler (26) are arranged in sequence from top to bottom inside the tower body (24).

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