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

Abstract

The invention 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 converting surplus hydrodynamic energy of circulating return water, and particularly relates to a hydroelectric dual-drive device, a surplus energy generating set, and a cooling tower. Background Art

[0002] In an industrial cooling circulating water system, traditional medium and large cooling tower fans usually operate driven by an electric motor (pure electric energy) - a long transmission shaft - a speed reducer. The cooling tower fan motor runs for a long time, consuming a large amount of electricity and continuously generating high electricity bills. The circulating return water rises to the cooling tower, is split by the water distribution pipe, atomized by the spray nozzle and falls in a refined manner, and then exchanges heat through the packing flow channel to cool down. There is "surplus water kinetic energy" in the circulating return water, which is released and wasted at the outlet plane of the water distribution nozzle in the cooling tower (where the water distribution nozzle contacts the atmosphere). How to apply the surplus kinetic energy of the circulating return water to the cooling tower fan has become an urgent problem to be solved. Summary of the Invention

[0003] In order to apply the surplus kinetic energy of the circulating return water to the cooling tower fan, reduce the waste of surplus water kinetic energy, save the electricity cost, and at the same time generate the effect of power generation income, this application provides a hydroelectric dual-drive device, a surplus energy generating set, and a cooling tower.

[0004] In the first aspect, a hydroelectric dual-drive device and a surplus energy generating set provided by this application adopt the following technical solutions: A hydroelectric dual-drive device and a surplus energy generating set include a water turbine and a permanent magnet synchronous motor. An inlet pipe and an outlet pipe are arranged on the water turbine, and the outlet pipe is communicated with the water distribution pipe in the 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 transmission shaft of the cooling tower.

[0005] By adopting the above technical solutions, when the fan of the cooling tower needs to rotate, there are three driving modes: 1. Sufficient water kinetic energy: Only the water turbine operates, driving the fan to operate through the permanent magnet synchronous motor, the transmission shaft, and the speed reducer in the air duct. The transmission shaft and the speed reducer in the air duct are components in the cooling tower (specifically stated that when only the water turbine operates, the rotating shaft of the permanent magnet synchronous motor "idles", acting as a transmission shaft. At this time, the permanent magnet synchronous motor does not consume electricity, does not generate electricity, and does not generate resistance.); 2. There is water kinetic energy, but it is insufficient: The water turbine works, and at the same time the permanent magnet synchronous motor is energized to generate a rotating torque, and the fan is driven to operate through the "water kinetic energy + compensated electric energy" mode via the transmission shaft and the speed reducer in the air duct; 3. No water kinetic energy: The permanent magnet synchronous motor (pure electric energy) operates, driving the fan to operate through the transmission shaft and the speed reducer in the air duct.

[0006] The "surplus energy, water kinetic energy" of the circulating return water is converted into mechanical energy through a water turbine to drive the rotation of the cooling tower fan, thus replacing the traditional motor (pure electric energy) on the cooling tower to drive the fan, achieving the effect of energy conservation and consumption reduction; when the surplus energy of the return water is low and the environmental temperature is high (in hot summer weather), only driving the fan by the water turbine (low speed and small air volume) cannot make the outlet water temperature of the cooling tower meet the production process requirements. At this time, external power (differential power) needs to be added to increase the fan speed and air volume. This application can drive the cooling tower fan to operate in the way of "water kinetic energy + compensated electric energy". It plays a role in converting and applying the surplus kinetic energy of the circulating return water to the cooling tower fan, reducing the waste of surplus water kinetic energy, and saving the electricity cost.

[0007] Optionally, it further includes an elastic coupling, a speed increaser and a hydraulic generator. The speed increaser is of a one-in-two-out type; the output shaft of the water turbine is connected to the input end of the speed increaser through an elastic 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 hydraulic generator.

[0008] Optionally, it further includes a first on-off device and a second on-off device; one output end of the speed increaser is connected to the main shaft of the permanent magnet synchronous motor through the first on-off device, and the other output end is connected to the input shaft of the hydraulic generator through the second on-off device.

[0009] By adopting the above technical solution, in cold winter weather, the speed of the fan can be reduced or the fan can be stopped. At this time, the surplus water kinetic energy of the return water is converted to drive the hydraulic generator to generate electricity and be connected to the grid. When the fan needs to be decelerated or stopped, a lower water energy can be used to drive the fan to rotate at a low speed; or the water kinetic energy is not distributed to stop the fan. By disconnecting the first on-off device and making the second on-off device in the on state, the water kinetic energy is maximally converted to drive the hydraulic generator to generate electricity and achieve grid connection.

[0010] Optionally, a first inlet valve is provided on the inlet pipe, an outlet valve is provided on the outlet pipe, a bypass pipe on the tower is connected between the inlet pipe and the outlet pipe, and a first bypass valve is provided on the bypass pipe on the tower.

[0011] By adopting the above technical solution, when the hydroelectric dual-drive device and the surplus energy generating unit need to be overhauled, the first inlet valve and the outlet valve are closed, and the first bypass valve is opened. The circulating water will not flow through the water turbine, realizing water cut-off maintenance.

[0012] Optionally, the first inlet valve, the outlet valve and the first bypass valve are all electric valves.

[0013] Optionally, it further includes an intelligent control cabinet. 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.

[0014] By adopting the above technical solution, the intelligent control cabinet will include a frequency converter, which is dedicated to the start-stop and speed regulation operation control of the permanent magnet synchronous motor. The intelligent control cabinet will also be equipped with an automatic synchronization device, which is dedicated to solving the problem of power grid connection of the hydraulic generator. An industrial PLC is also installed in the intelligent control cabinet, which is used to collect and display the operating condition data of the unit and upload it to the DCS. At the same time, there is a control system for the on-off device, and the control systems for the first water inlet valve, the water outlet valve and the first bypass valve. The relevant structures of the above intelligent control cabinet are all existing technologies and can be set according to the actual situation. Through the setting of the intelligent control cabinet, each part automatically divides labor and cooperates, efficiently and reliably.

[0015] Optionally, a bypass upper water pipe is connected to the side wall of the water inlet pipe, and the end of the bypass upper water pipe far from the water inlet pipe is connected to the water distribution pipe in the cooling tower; a second water inlet valve is arranged on the water inlet pipe, and the second water inlet valve is closer to the first water inlet valve than the connection of the bypass upper water pipe and the water inlet pipe, and a second bypass valve is arranged on the bypass upper water pipe.

[0016] By adopting the above technical solution, the permanent magnet synchronous motor, the water turbine and the hydraulic generator are combined to form a unit. In actual situations, the unit is installed outside the wind barrel on the top of the cooling tower, higher than the plane of the water distribution system in the cooling tower. If the return water pressure of the system is low, driving the water turbine to operate on the top of the tower and raising the water head may reduce the circulating water volume. However, in high-temperature summer weather, the production process does not allow the reduction of the circulating water volume. Therefore, through the setting of this application, the second bypass valve can be opened at this time, and the second water inlet valve, the water outlet valve and the first bypass valve can be closed, so that the return water enters the water distribution pipe in the cooling tower instead of the water turbine on the top of the tower (restoring the circulating water operation state). The first on-off device and the second on-off device are all automatically disconnected. At this time, the speed increaser and the water turbine are stationary, and the intelligent control cabinet supplies power to the permanent magnet synchronous motor. The permanent magnet synchronous motor rotates and drives the fan in the wind barrel to run at high speed with a large air volume through the transmission shaft, solving the cooling problem of the cooling tower. The permanent magnet synchronous motor (pure electric power) can drive the fan to run at the rated high speed or can run with stepless speed regulation.

[0017] In a second aspect, the present application provides a cooling tower, adopting the following technical solution: A cooling tower includes the above-mentioned hydroelectric dual-drive device and the residual energy generating set.

[0018] Optionally, it further includes a tower body, and the hydroelectric dual-drive device and the residual energy generating set are arranged outside the top of the tower body; a wind barrel is installed on the top of the tower body, and a speed increaser, a fan and a transmission shaft are arranged in the wind barrel. The output shaft of the speed increaser is connected to the fan and drives the fan to rotate, and one end of the transmission shaft far from the permanent magnet synchronous motor is connected to the speed increaser; a water distribution pipe, a water distribution nozzle and a water spraying filler are sequentially arranged in the tower body from top to bottom.

[0019] By adopting the above technical scheme, the water outlet from the turbine enters the water distribution pipe in the tower and is splashed downward through the water distribution nozzle, and the scattered flow passes through the water spraying filler. The fan operates to suck dry cold air into the tower through the filler flow channel from bottom to top, and contact heat transfer occurs with the water flow to achieve circulating water cooling. 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 through the water supply pump. The outlet water of the heat exchanger (circulating return water, hot water) enters the turbine through the return water main pipe and the water inlet pipe to participate in the circulation.

[0020] In summary, the present application includes at least the following beneficial technical effects: The cooling tower fan is driven to operate (automatic speed regulation) by a water turbine, a one-inlet and two-outlet speed increaser, a first on-off device, a permanent magnet synchronous motor and an intelligent control cabinet with a frequency converter, thereby ensuring that the cooling tower meets the production process throughout the year and continuously saving energy and reducing consumption; when the ambient temperature is too low in winter, the fan stops running and the first on-off device is cut off, and the water turbine, a one-inlet and two-outlet speed increaser, a second on-off device, a professional hydraulic generator cooperate with automatic quasi-synchronization and an intelligent control cabinet to output clean electric energy and connect to the power grid, thereby continuously generating economic benefits; compared with the operation of pure electric fans in traditional cooling towers, the present application has a simple process, reduces labor costs, and generates economic benefits all year round. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a side view of a cooling tower in an embodiment of the present application.

[0022] Figure 2 It is a structural schematic diagram used to display the water distribution pipe in the embodiment of the present application.

[0023] Figure 3 It is a top view of the wind tube in the embodiment of the present application.

[0024] Figure 4 It is a side view of the hydroelectric dual-drive device and the surplus energy generator set in the embodiment of the present application.

[0025] Figure 5 It is a top view of the hydroelectric dual-drive device and the surplus energy generator set in this application.

[0026] Figure 6 It is a layout diagram of the hydroelectric dual-drive device and the surplus energy generator set in the embodiment of the present application.

[0027] Description of the reference numerals in the drawings: 1, water inlet pipe; 2, first water inlet valve; 3, water turbine; 4, flexible coupling; 5, speed increaser; 6, first on-off device; 7, permanent magnet synchronous motor; 8, second on-off device; 9, hydraulic generator; 10, common machine base; 11, intelligent control cabinet; 12, transmission shaft; 13, speed reducer; 14, fan; 15, air duct; 16, outlet elbow; 17, outlet valve; 18, water outlet pipe; 19, bypass pipe on the tower; 20, first bypass valve; 21, bypass upper water pipe; 22, second bypass valve; 23, second water inlet valve; 24, tower body; 25, water distribution pipe; 26, water spraying filler. Specific embodiments

[0028] The following is a further detailed description of this application in conjunction with the attached Figures 1-6 drawings.

[0029] In a first aspect, embodiments of this application disclose a hydroelectric dual-drive device and a surplus energy generating set. Referring to Figures 1-3 , the hydroelectric dual-drive device and the surplus energy generating set include a water turbine 3 and a permanent magnet synchronous motor 7. An inlet pipe 1 and an outlet pipe 18 are provided on the water turbine 3. One end of the outlet pipe 18 is connected to the water turbine 3 through an outlet elbow 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 transmission shaft 12 of the cooling tower.

[0030] When the fan 14 of the cooling tower needs to rotate, there are three driving methods: 1. Sufficient water kinetic energy: Only the water turbine 3 operates to drive the fan 14 to operate through the permanent magnet synchronous motor 7, the transmission shaft 12, and the speed reducer 13 in the air duct 15. The transmission shaft 12 and the speed reducer 13 in the air duct 15 are components in the cooling tower (specifically stated that when only the water turbine 3 operates, the rotating shaft of the permanent magnet synchronous motor 7 is "idling", equivalent to a transmission shaft 12. At this time, the permanent magnet synchronous motor 7 does not consume electricity, does not generate electricity, and does not generate resistance.); 2. There is water kinetic energy, but it is insufficient: The water turbine 3 works, and at the same time, the permanent magnet synchronous motor 7 is energized to generate a rotating torque, and the fan 14 is driven to operate through the transmission shaft 12 and the speed reducer 13 in the air duct 15 by the method of "water kinetic energy + compensated electric energy"; 3. There is no water kinetic energy: The permanent magnet synchronous motor 7 (pure electric energy) operates to drive the fan 14 to operate through the transmission shaft 12 and the speed reducer 13 in the air duct 15.

[0031] The "surplus energy, water kinetic energy" of the circulating return water is converted into mechanical energy through the water turbine 3 to drive the cooling tower fan 14 to rotate, thereby replacing the traditional motor (pure electric energy) on the cooling tower to drive the fan 14, achieving the effect of energy conservation and consumption reduction; if the surplus energy of the return water is low and the ambient temperature is high (in high-temperature summer weather), only driving the fan 14 to operate through the water turbine 3 (low speed and small air volume) cannot make the outlet water temperature of the cooling tower meet the production process requirements. At this time, external power (differential power) needs to be added to increase the rotation speed of the fan 14 and increase the air volume. This application can adopt the method of "water kinetic energy + compensated electric energy" to drive the cooling tower fan 14 to operate. It plays a role in converting and applying the surplus kinetic energy of the circulating return water to the cooling tower fan 14, reducing the waste of surplus water kinetic energy, and saving electricity costs.

[0032] Refer to Figures 3-5 , the water-electricity dual-drive device and the surplus energy generating set further include an elastic coupling 4, a speed increaser 5, a hydraulic generator 9, a first on-off device 6 and a second on-off device 8. The speed increaser 5 is of 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 elastic coupling 4, and 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 hydraulic 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 hydraulic generator 9 through the second on-off device 8.

[0033] In the case of cold winter weather, the speed of the fan 14 can be reduced or the fan 14 can be stopped. At this time, the water kinetic energy is converted to drive the hydraulic generator 9 to generate electricity and be connected to the grid. When the fan 14 needs to be decelerated or stopped, a lower water energy is used to drive the fan 14 to rotate at a low speed; or no water kinetic energy is allocated to stop the fan 14. The first on-off device 6 can be disconnected and the second on-off device 8 can be in a connected state. At this time, the water kinetic energy is maximally converted to drive the hydraulic generator 9 to generate electricity and achieve grid connection.

[0034] Refer to Figures 1-2 and Figure 5 , a first inlet valve 2 is provided on the inlet pipe 1, an outlet valve 17 is provided on the outlet pipe 18, a bypass pipe 19 on the tower is connected between the inlet pipe 1 and the outlet pipe 18, and a first bypass valve 20 is provided on the bypass pipe 19 on the tower. When the water-electricity dual-drive device and the surplus energy generating set need to be overhauled, the first inlet valve 2 and the outlet valve 17 are closed, and the first bypass valve 20 is opened. The circulating water then does not flow through the water turbine 3, realizing water cut-off for overhaul.

[0035] Refer to Figure 5The hydroelectric dual-drive device and the surplus energy generator set also include an intelligent control cabinet 11. The first water inlet valve 2, the water outlet valve 17 and the first bypass valve 20 are all electric valves. The first on-off device 6, the second on-off device 8, the first water inlet valve 2, the water outlet valve 17 and the first bypass valve 20 are all electrically connected to the intelligent control cabinet 11. The intelligent control cabinet 11 will include a frequency converter, which is dedicated to the start and stop and speed regulation operation control of the permanent magnet synchronous motor 7. There will also be an automatic quasi-synchronous device on the intelligent control cabinet 11, which is dedicated to solving the grid connection problem of the hydroelectric generator 9 generating electricity. An industrial PLC is also installed in the intelligent control cabinet 11, which is used to collect and display the operating condition data of the unit and upload it to the DCS at the same time. There is also a control system for the on-off device, the first water inlet valve 2, the water outlet valve 17 and the first bypass valve 20. The relevant structures of the above-mentioned intelligent control cabinet 11 are all existing technologies, which can be set according to the actual situation. Through the setting of the intelligent control cabinet 11, each part automatically divides the work and cooperates, which is efficient and reliable.

[0036] Reference Figures 1-3 and Figure 5 A bypass upper water pipe 21 is connected to the side wall of the water inlet pipe 1, and the end of the bypass upper water 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 arranged on the water inlet pipe 1, and the second water inlet valve 23 is closer to the first water inlet valve 2 than the connection between the bypass upper water pipe 21 and the water inlet pipe 1, and a second bypass valve 22 is arranged on the bypass upper water pipe 21.

[0037] The permanent magnet synchronous motor 7, the turbine 3 and the hydroelectric generator 9 are combined to form a unit. In actual situations, the unit is installed outside the cooling tower top wind tube 15, which is higher than the plane of the water distribution system in the cooling tower. If the system return water pressure is low, the upper tower top drives the turbine 3 to run, and raising the water head may reduce the circulating water volume. However, in hot summer weather, the production process does not allow the circulating water volume to be reduced. For this reason, through the setting of this application, the second bypass valve 22 can be opened at this time, the second water inlet valve 23, the water outlet valve 17 and the first bypass valve 20 can be closed, and the return water can enter the water distribution pipe 25 in the cooling tower without the upper tower top turbine 3 (restoring the circulating water operation state). The first on-off device 6 and the second on-off device 8 are all automatically disconnected. At this time, the speed increaser 5 and the turbine 3 are stationary, and the intelligent control cabinet 11 supplies power to the permanent magnet synchronous motor 7. The output shaft of the permanent magnet synchronous motor 7 drives the fan 14 in the wind tube 15 to run at a high speed and large air volume through the transmission shaft 12, solving the cooling tower cooling problem. The permanent magnet synchronous motor 7 (pure electric power) can drive the fan 14 to run at a rated high speed, and can also run at a stepless speed regulation.

[0038] In a second aspect, the present application discloses a cooling tower, which adopts the following technical solution: Reference Figures 1-3, the cooling tower includes the above-mentioned common machine base 10, the hydro-electric dual-drive device and the surplus energy generating set, and the tower body 24. The hydro-electric dual-drive device and the surplus energy generating set are arranged on the common machine base 10 at the top of the tower body 24, and the common machine base 10 is fixedly installed outside the air duct 15; the air duct 15 is installed at the top of the tower body 24, and a speed reducer 13, a fan 14 and a transmission shaft 12 are arranged inside the air duct 15. The output shaft of the speed reducer 13 is connected to the fan 14 to drive the rotation of the fan 14, and one end of the transmission shaft 12 away from the permanent magnet synchronous motor 7 is connected to the speed reducer 13; a water distribution pipe 25 and a water spraying filler 26 are arranged in the tower body 24 from top to bottom in sequence. The water output from the water turbine 3 enters the water distribution pipe 25 in the tower and is sprayed downward through the water spraying nozzles, and is scattered to flow through the water spraying filler. The fan operates to suck dry cold air into the tower and flow upward through the filler flow channel from bottom to top, and contact heat transfer occurs with the water flow to realize the cooling of the circulating water. Then the circulating water falls to the bottom pool of the cooling tower, and then is sent to the heat exchanger by the water supply pump for use. The water output from the heat exchanger (circulating return water, hot water) enters the water turbine 3 through the return water main pipe and the water inlet pipe 1 to participate in the cycle.

[0039] The implementation principle of the hydro-electric dual-drive device and the surplus energy generating set in the embodiment of the present application is as follows: The whole unit is installed outside the air duct 15 at the top of the cooling tower. A fan 14 and a speed reducer 13 are installed inside the air duct 15 at the top of the tower. The long transmission shaft 12 passes through the air duct 15 and is connected to the internal speed reducer 13 at one end and the permanent magnet synchronous motor 7 of this unit outside the air duct 15 at the other end. The hydro-electric dual-drive device and the surplus energy generating set include a water turbine 3, a one-in-two-out type speed increaser 5, a first on-off device 6, a second on-off device 8, a permanent magnet synchronous motor 7, a hydraulic generator 9 and an intelligent control cabinet 11. The unit layout mode refers to Figure 6 .

[0040] Unit operation mode 1: In spring and autumn, the climate is cool. The circulating return water enters the water turbine 3 at the top of the tower, is accelerated by the speed increaser 5, and the first on-off device 6 automatically meshes under the control of the intelligent control cabinet 11 (the second on-off device 8 automatically disconnects and the generator is stationary). The rotating shaft of the permanent magnet synchronous motor 7 (not powered on, not consuming electricity, not generating electricity, in an idling state) drives the long transmission shaft 12, and finally drives the speed reducer 13 and the fan 14 inside the air duct 15 to operate. The water output from the water turbine 3 flows downward and enters the water distribution pipe 25 in the cooling tower. Only the surplus energy of the system return water is used to drive the operation of the cooling tower fan 14, and the purpose of energy saving (zero power consumption) is achieved on the premise of ensuring that the system water volume and the cooling effect of the cooling tower meet the production requirements.

[0041] Unit operation mode 2: In hot summer weather, if "operation mode 1" is adopted and the surplus energy of the return water is small, resulting in a relatively low rotational speed and air volume of the fan 14. At this time, according to the monitored data of the water temperature out of the tower, the intelligent control cabinet 11 supplies power to the permanent magnet motor through the frequency converter. The output torque of the permanent magnet synchronous motor 7 automatically combines with "the output of the water turbine 3", and the two forces jointly drive the fan 14 in the air duct 15 to operate at high speed with a large air volume, meeting the cooling requirements of the cooling tower (only operating in hot weather, short time, less supplementary power), achieving the purpose of energy conservation. At the same time, the frequency and rotational speed of the permanent magnet synchronous motor 7 can be automatically adjusted to keep the rotational speed (air volume) of the fan 14 in the best matching state with the water temperature out of the cooling tower, maximizing the energy-saving benefit.

[0042] Unit operation mode 3: Since the hydroelectric dual-drive device and the surplus energy generating unit are installed outside the air duct 15 on the top of the cooling tower, higher than the plane of the water distribution system inside the cooling tower. If the return water pressure of the system is low, when driving the water turbine 3 to operate on the top of the tower, raising the water head may reduce the circulating water volume. In hot summer weather, the production process does not allow reducing the circulating water volume. At this time, open the second bypass valve 22 under the tower, and the return water enters the water distribution pipe 25 inside the cooling tower instead of the water turbine 3 on 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 all automatically disconnected (the speed increaser 5 and the water turbine 3 are stationary), and the intelligent control cabinet 11 supplies power to the permanent magnet synchronous motor 7 through the frequency converter. The output torque of the permanent magnet motor drives the fan 14 in the air duct 15 to operate at high speed with a large air volume, solving the cooling problem of the cooling tower. The permanent magnet synchronous motor 7 (pure electric power) can drive the fan 14 to operate at the rated high speed.

[0043] Unit operation mode 4: In cold winter weather, the cooling tower fan 14 can stop operating (when there are multiple cooling towers in parallel in the same circulating water system, 1, 2,... multiple units can be stopped). The first on-off device 6 is automatically disconnected (the permanent magnet synchronous motor 7, the transmission shaft 12, and the speed reducer 13 stop rotating), and the second on-off device 8 is automatically engaged. The output of the water turbine 3 drives the hydraulic generator 9 to operate through the speed increaser 5 and the second on-off device 8, and the generated electricity enters the intelligent control cabinet 11 and is synchronized and adjusted automatically and then connected to the grid.

[0044] This hydroelectric dual-drive and hydraulic generator 9 set is an assembled and debugged unit, which is installed and fixed on the same common machine base 10. The equipment and the machine base are integrally installed outside the air duct 15 on the top of the tower, with a compact structure, convenient construction, and clear visibility for inspection. Lubricating grease can be added to the unit without shutting down the machine.

[0045] This unit automatically switches both when providing power to drive the fan 14 to operate and when generating electricity and connecting to the grid, simplifying the process and reducing labor costs.

[0046] The above are all the preferred embodiments of this application. The protection scope of this application is not limited by this. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. A hydroelectric dual-drive device and a surplus energy generating set, characterized in that: It includes a water turbine (3) and a permanent magnet synchronous motor (7). An inlet pipe (1) and an outlet pipe (18) are provided on the water turbine (3), and the outlet pipe (18) is connected to a 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 transmission shaft (12) of the cooling tower.

2. The hydroelectric dual-drive device and residual energy generating set according to claim 1, wherein: It further includes an elastic coupling (4), a speed increaser (5) and a hydraulic generator (9). The speed increaser (5) is of a one-inlet two-outlet type; the output shaft of the water turbine (3) is connected to the input end of the speed increaser (5) through the elastic coupling (4), and 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 hydraulic generator (9).

3. The hydro - electric dual - drive device and residual energy generating set according to claim 2, characterized in that: It further includes a first on-off device (6) and a second on-off 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 on-off device (6), and the other output end is connected to the input shaft of the hydraulic generator (9) through the second on-off device (8).

4. A hydroelectric and electric dual-drive device and surplus energy generating set according to claim 3, characterized in that: A first inlet valve (2) is provided on the inlet pipe (1), an outlet valve (17) is provided on the outlet pipe (18), a tower bypass pipe (19) is connected between the inlet pipe (1) and the outlet pipe (18), and a first bypass valve (20) is provided on the tower bypass pipe (19).

5. A hydroelectric dual-drive device and a surplus energy generating 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 hydro - electric dual - drive device and residual energy generating set according to claim 5, characterized in that: It further includes an intelligent control cabinet (11). 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 and electric dual-drive device and a surplus energy generating unit according to any one of claims 1-5, characterized in that: A bypass upper water pipe (21) is connected to the side wall of the inlet pipe (1), and the end of the bypass upper water pipe (21) far from the inlet pipe (1) is connected to the water distribution pipe (25) in the cooling tower; a second inlet valve (23) is provided on the inlet pipe (1), and the second inlet valve (23) is closer to the first inlet valve (2) than the connection point of the bypass upper water pipe (21) and the inlet pipe (1), and a second bypass valve (22) is provided on the bypass upper water pipe (21).

8. A cooling tower, characterized in that: It includes the hydroelectric dual-drive device and the surplus energy generating set according to any one of claims 1-7.

9. The cooling tower according to claim 8, wherein: It further includes a tower body (24). The hydroelectric dual-drive device and the surplus energy generating set are arranged on the top of the tower body (24); a wind cylinder (15) is installed on the top of the tower body (24). A speed reducer (13), a fan (14) and a transmission shaft (12) passing through the wind cylinder are arranged in the wind cylinder (15). The output shaft of the speed reducer (13) is connected to the fan (14) and drives the fan (14) to rotate. The end of the transmission shaft (12) far from the permanent magnet synchronous motor (7) is connected to the speed reducer (13); a water distribution pipe (25) and a water spraying filler (26) are sequentially arranged in the tower body (24) from top to bottom.

Images