CN216950656U - Special water turbine for cooling tower with power generation dual-purpose permanent magnet motor - Google Patents
Special water turbine for cooling tower with power generation dual-purpose permanent magnet motor Download PDFInfo
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- CN216950656U CN216950656U CN202123415373.XU CN202123415373U CN216950656U CN 216950656 U CN216950656 U CN 216950656U CN 202123415373 U CN202123415373 U CN 202123415373U CN 216950656 U CN216950656 U CN 216950656U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
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Abstract
The utility model discloses a special water turbine for a cooling tower of a dual-purpose permanent magnet motor with power generation, which relates to the technical field of water turbines and comprises a cooling tower, wherein the water turbine is arranged in the cooling tower, a fan blade is fixedly arranged on an output shaft of the water turbine, a motor box body is arranged on the outer side of the output shaft of the water turbine, and a speed measuring probe is fixedly arranged at one end, close to the fan blade, of the motor box body. When the temperature rises in summer and the required air volume is increased, the permanent magnet motor is started through the frequency converter to serve as auxiliary power, and the rotating speed of the fan can be properly adjusted through the frequency converter according to the requirement of the cooling tower on the change of the air volume. In winter, the fan blades are removed, and the four-quadrant frequency converter can receive the input current of the motor and input the generated power of the motor into the power grid.
Description
Technical Field
The utility model relates to the technical field of water turbines, in particular to a water turbine special for a cooling tower with a dynamic power generation dual-purpose permanent magnet motor.
Background
In an industrial circulating water system, system return water often has certain return water pressure, and is generally consumed by properly closing a return water valve of the system, and a water turbine for a cooling tower drives a fan of the cooling tower to rotate by utilizing the surplus pressure of the return water in the circulating water system, so that an original cooling tower motor is replaced, and the energy-saving effect is achieved.
Most of circulating water system single-tower backwater surplus energy is often not enough to drive the fan to reach the original rotating speed, thereby reaching the original cooling effect, and the solution adopted at present mainly comprises the following steps:
1. and water transformation, namely, the surplus energy of the backwater of two or more cooling towers is utilized to push one fan to do work to realize energy-saving transformation of one tower, and other towers are driven by the original motor.
2. The improvement is realized by adding an auxiliary motor, generally, a common four-stage or six-stage asynchronous motor is adopted, and a belt pulley (in the case of small auxiliary power) or a speed reducer (in the case of large auxiliary power) is coupled with an original transmission system to realize hybrid drive.
3. The fan is driven by the built-in direct-connected motor hybrid water turbine to reach the original rotating speed, so that the cooling effect is realized.
The permanent magnet motor of the existing hybrid water turbine with the built-in direct-connected motor only has a power function, and the matching of the motor power is also selected according to the difference value between the output power of the water turbine and the actual power of the original motor, so that the power generation function cannot be realized.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a special water turbine for a cooling tower of a dual-purpose permanent magnet motor with power generation, which aims to solve the problems in the background technology.
In order to achieve the purpose, the utility model provides the following technical scheme: the utility model provides a take dual-purpose permanent magnet motor's of power generation special hydraulic turbine of cooling tower, includes the cooling tower, the internally mounted of cooling tower has the hydraulic turbine, the output shaft fixed mounting of the hydraulic turbine has the flabellum, the wet return of cooling tower is connected to the hydraulic turbine, the output shaft outside of the hydraulic turbine is equipped with the motor box, and the output shaft runs through the motor box, and flabellum fixed mounting at the top of output shaft, the internally mounted of motor box has stator, rotor, the one end fixed mounting that the motor box is close to the flabellum has the probe that tests the speed, still includes rotational speed variable frequency control cabinet, rotational speed variable frequency control cabinet and test the speed probe, motor box are connected.
Preferably, the fan blades are mounted on the upper end of the output shaft through a hub.
Preferably, a rotating wheel is installed inside the water turbine, and a water outlet pipe of the water turbine is connected with a spray head of the cooling tower.
Preferably, the rotating speed variable frequency control cabinet is connected with an external wire, and a circuit breaker and a motor switch are installed on the wire.
Preferably, the original fan shaft power is set as P0The output power of the water turbine is P1The shaft power of the compensation motor is P2And then:
P2＝P0-P1
considering that the cooling effect needs to be properly improved under some conditions, the rotating speed of the fan can be properly increased, namely the power P of the auxiliary motor is properly increased2Thereby improving the shaft power of the fan and achieving the purpose of improving the cooling effect.
Compared with the prior art, the utility model has the beneficial effects that:
according to the utility model, the speed measuring probe and the frequency converter are arranged, so that the power grid supplies power to the motor through the frequency converter when the cooling tower needs to be cooled. Rivers get into the hydraulic turbine from the spiral case, drive and discharge from the outlet pipe after the runner does work, and the runner passes through the main shaft and drives the fan and go to, and the fan only is driven by the hydraulic turbine when the amount of wind that the cooling tower needs is not big, rises when temperature in summer, and the amount of wind increases, opens permanent-magnet machine through the converter and as auxiliary power, can be according to the requirement of cooling tower to the amount of wind variation in size, through the appropriate rotational speed of adjusting the fan of converter.
In winter, the fan blades are removed, and the four-quadrant frequency converter can receive the input current of the motor and input the generated power of the motor into the power grid.
The motor is selected and matched according to the larger value of the phase difference value of the output power of the water turbine, the output power of the water turbine and the actual power of the original motor, so that the motor can simultaneously meet the functions of an auxiliary motor and power generation. Considering that the cooling effect needs to be properly improved under some conditions, the rotating speed of the fan can be properly increased, namely the power P of the auxiliary motor is properly increased2Thereby improving the shaft power of the fan and achieving the purpose of improving the cooling effect.
Drawings
FIG. 1 is a cross-sectional view of a water turbine and blades in accordance with the present invention;
FIG. 2 is a top view of the turbine and blades of the present invention;
fig. 3 is a schematic view of the entire structure of the present invention.
In the figure: 1. a motor case; 2. a stator; 3. a rotor; 4. a bearing; 5. an output shaft; 6. a hub; 7. a speed measuring probe; 8. a fan blade; 9. a rotating wheel; 10. a water outlet pipe; 11. a rotating speed variable frequency control cabinet; 13. connecting an electric wire; 14. a circuit breaker; 15. a motor switch; 16. a motor control line; 17. the temperature control line.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-3, the embodiment provides a special water turbine for a cooling tower with a dual-purpose permanent magnet motor for power generation, which includes a cooling tower, a water turbine installed inside the cooling tower, a blade 8 fixedly installed on an output shaft 5 of the water turbine, the output shaft of the water turbine 5 being capable of driving the blade 8 to rotate to provide power for the blade 8, a water inlet of the water turbine being connected to a water return pipe of the cooling tower, and water in the water return pipe of the cooling tower entering the inside of the water turbine being capable of driving the output shaft to rotate.
The internally mounted of hydraulic turbine has runner 9, and the water that gets into the spiral case can take runner 9 to rotate, and runner 9 passes through the key-type connection with output shaft 5, can take output shaft 5 to rotate, and the shower nozzle of cooling tower is connected to the outlet pipe 10 of hydraulic turbine, and the water that flows out from the hydraulic turbine can be through the shower nozzle blowout to flow into in the cooling tower.
The outer side of an output shaft 5 of the water turbine is provided with a motor box body 1, the motor box body 1 is connected with the output shaft 5 through a bearing 4, the output shaft 5 penetrates through the motor box body 1, the fan blades 8 are fixedly arranged at the top of the output shaft 5, the stator 2 and the rotor 3 are arranged in the motor box body 1, the stator 2 is fixedly arranged in the motor box body 1, the rotor 3 is fixedly connected with the output shaft 5, one end of the motor box body 1 close to the fan blades 8 is fixedly provided with the speed measuring probe 7, the working part of the speed measuring probe 7 faces the fan blades 8, can be used for detecting the slew velocity of flabellum 8, still include rotational speed variable frequency control cabinet 11, rotational speed variable frequency control cabinet 11 and speed probe 7 and motor box 1 pass through the connection of electric lines, and speed probe 7 can transmit the rotational speed of the flabellum 8 that detects for rotational speed variable frequency control cabinet 11 changes output frequency.
The frequency converter is arranged inside the rotating speed frequency conversion control cabinet 11 and is connected with an external circuit of the motor, the frequency converter is a motor frequency converter and can change the output frequency so as to control the rotating speed of the motor, the currently used frequency converter mainly adopts an alternating current-direct current-alternating current mode (VVVF frequency conversion or vector control frequency conversion), firstly, a power frequency alternating current power supply is converted into a direct current power supply through a rectifier, and then, the direct current power supply is converted into an alternating current power supply with controllable frequency and voltage so as to be supplied to the motor.
The water turbine is an ultra-low specific speed mixed-flow water turbine, the motor is a low-speed permanent magnet synchronous motor, the power grid supplies power to the motor through the frequency converter, water flow enters the water turbine from the volute and drives the rotating wheel 9 to do work and then is discharged from the water outlet pipe 10, and the rotating wheel 9 drives the fan blades 8 to rotate through the output shaft 5. When the air quantity required by the cooling tower is not large, the fan is only driven by the water turbine, when the temperature rises in summer and the required air quantity is increased, the permanent magnet motor is started through the frequency converter to serve as auxiliary power, and the rotating speed of the fan can be properly adjusted through the frequency converter according to the requirement of the cooling tower on the change of the air quantity.
In the embodiment, the ultra-multi-stage permanent magnet motor is matched with the four-quadrant frequency converter, the motor is used as a power device in summer, and the switching and the speed regulation of the motor can be realized through the variable-frequency rotating speed variable-frequency control cabinet according to the requirement of the cooling tower on temperature reduction.
The motor starting method comprises the following steps:
because the permanent magnet motor starts generally from zero hertz through the converter, and the motor starts from static acceleration, this patent generally is that the hydraulic turbine starts in advance, reaches certain rotational speed, has certain rotational speed before the motor starts, and the motor starting method does, and the initial frequency of converter is input and is obtained according to the rotational speed that surveys.
Under the condition that the weather is cold in winter, when the water of the cooling tower is not cooled, the fan blades are removed, and the frequency converter can receive the input current of the motor and input the generated power of the motor into the power grid due to the four-quadrant frequency converter, so that the power generation is realized.
The flabellum 8 is installed in the upper end of output shaft 5 through wheel hub 6, when dismantling the flabellum, can dismantle wheel hub 6 to directly take off flabellum 8.
The rotating speed variable frequency control cabinet 11 is connected with an external wire 13, a circuit breaker 14 and a motor switch 15 are installed on the wire, the circuit breaker has a protection effect on a circuit, and the circuit overload is avoided. The motor switch can be used for starting and stopping the motor and controlling the operation of the motor.
Motor switch passes through motor control line 16 and is connected with rotational speed variable frequency control cabinet 11, and rotational speed variable frequency control cabinet 11 is through the vibration, speed measuring probe and temperature sensor are connected to temperature control line 17, speed measuring probe and temperature sensor install in the cooling tower, the probe of vibration and rotational speed is measured to the hydraulic turbine upper band, detect the operation status of the hydraulic turbine, temperature sensor can detect the temperature, and vibration sensor can detect the frequency that the vibration can pass through four-quadrant converter accommodate motor, change flabellum 8's rotational speed, realize the better cooling to the cooling tower.
And (3) selecting and calculating the motors:
setting the original shaft power of the fan as P0The output power of the water turbine is P1The shaft power of the compensation motor is P2And then:
P2＝P0-P1
considering that the cooling effect needs to be properly improved under some conditions, the rotating speed of the fan can be properly increased, namely the power P of the auxiliary motor is properly increased2Thereby increasing P0And the purpose of improving the cooling effect is achieved.
The motor is selected and matched according to the larger value of the phase difference value of the output power of the water turbine, the output power of the water turbine and the actual power of the original motor, so that the motor can simultaneously meet the functions of an auxiliary motor and power generation.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. The utility model provides a take dual-purpose permanent magnet machine's of power generation special hydraulic turbine of cooling tower, includes the cooling tower, its characterized in that: the internally mounted of cooling tower has the hydraulic turbine, output shaft (5) fixed mounting of the hydraulic turbine has flabellum (8), the wet return of cooling tower is connected to the hydraulic turbine, output shaft (5) the outside of the hydraulic turbine is equipped with motor box (1), and output shaft (5) run through motor box (1), and flabellum (8) fixed mounting at the top of output shaft (5), the internally mounted of motor box (1) has stator (2), rotor (3), motor box (1) is close to the one end fixed mounting of flabellum (8) and tests speed probe (7), still includes rotational speed variable frequency control cabinet (11), rotational speed variable frequency control cabinet (11) and test speed probe (7), motor box (1) and connect, rotational speed variable frequency control cabinet (11) internally mounted has the converter.
2. The special water turbine for the cooling tower of the dual-purpose permanent magnet motor with power generation as claimed in claim 1, is characterized in that: the frequency converter is a four-quadrant frequency converter; in winter, the fan blades are removed, and the four-quadrant frequency converter can receive the input current of the motor and input the generated power of the motor into the power grid.
3. The water turbine special for the cooling tower of the dual-purpose permanent magnet motor with power generation as claimed in claim 1, characterized in that: the fan blades (8) are mounted at the upper end of the output shaft (5) through the hub (6).
4. The special water turbine for the cooling tower of the dual-purpose permanent magnet motor with power generation as claimed in claim 1, is characterized in that: and a rotating wheel (9) is arranged in the water turbine, and a water outlet pipe (10) of the water turbine is connected with a spray head of the cooling tower.
5. The special water turbine for the cooling tower of the dual-purpose permanent magnet motor with power generation as claimed in any one of claims 1 to 3, characterized in that: the rotating speed frequency conversion control cabinet (11) is connected with an external wire, and a circuit breaker (14) and a motor switch (15) are installed on the wire.
6. The special water turbine for the cooling tower of the dual-purpose permanent magnet motor with power generation as claimed in claim 4, is characterized in that: setting the original shaft power of the fan as P0The output power of the water turbine is P1The shaft power of the compensation motor is P2And then:
P2＝P0-P1
considering that the cooling effect needs to be properly improved under some conditions, the rotating speed of the fan can be properly increased, namely the power P of the auxiliary motor is properly increased2Thereby increasing P0And the purpose of improving the cooling effect is achieved.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123415373.XU CN216950656U (en) | 2021-12-30 | 2021-12-30 | Special water turbine for cooling tower with power generation dual-purpose permanent magnet motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123415373.XU CN216950656U (en) | 2021-12-30 | 2021-12-30 | Special water turbine for cooling tower with power generation dual-purpose permanent magnet motor |
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| CN216950656U true CN216950656U (en) | 2022-07-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202123415373.XU Active CN216950656U (en) | 2021-12-30 | 2021-12-30 | Special water turbine for cooling tower with power generation dual-purpose permanent magnet motor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117267153A (en) * | 2023-11-13 | 2023-12-22 | 西安力邦节能科技发展有限公司 | Intelligent mixing efficient energy-saving water turbine for circulating water system |
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2021
- 2021-12-30 CN CN202123415373.XU patent/CN216950656U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117267153A (en) * | 2023-11-13 | 2023-12-22 | 西安力邦节能科技发展有限公司 | Intelligent mixing efficient energy-saving water turbine for circulating water system |
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