CN212406816U - Steam-electric three-source power assembly with permanent magnet coupler arranged in different shafts - Google Patents
Steam-electric three-source power assembly with permanent magnet coupler arranged in different shafts Download PDFInfo
- Publication number
- CN212406816U CN212406816U CN202021467485.2U CN202021467485U CN212406816U CN 212406816 U CN212406816 U CN 212406816U CN 202021467485 U CN202021467485 U CN 202021467485U CN 212406816 U CN212406816 U CN 212406816U
- Authority
- CN
- China
- Prior art keywords
- permanent magnet
- speed
- magnet coupler
- motor
- speed reducer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Control Of Turbines (AREA)
Abstract
The utility model discloses a steam-electricity three-source power assembly with different-axis arrangement of permanent magnet couplers, wherein an output shaft of a steam turbine is connected with a first input shaft of a speed reducer through a first speed-regulating permanent magnet coupler, an output shaft of a motor is connected with a second input shaft of the speed reducer through a second speed-regulating permanent magnet coupler, an output shaft of a pneumatic motor is connected with a third input shaft of the speed reducer through a third speed-regulating permanent magnet coupler, and an output shaft of the speed reducer is mechanically connected with external rotating machinery; the control system is connected with the steam turbine, the first speed-regulating permanent magnet coupler, the motor, the second speed-regulating permanent magnet coupler, the pneumatic motor and the third speed-regulating permanent magnet coupler, and the power assembly has the characteristics of electric energy saving, simple starting and stopping operation and short consumed time.
Description
Technical Field
The utility model relates to a vapour electric three source power assemblies, concretely relates to vapour electric three source power assemblies that permanent magnet coupler different axis was arranged.
Background
The power production process of coal-fired power plants determines that a large number of fans, water pumps and various rotating machines need to be arranged in the power plants. Typically, these fans or pumps are driven by electric motors. The motor driving mode has the advantages of being fast in starting and stopping, stable and reliable, but with stricter energy consumption index assessment of the thermal power generating units, reduction of plant power consumption rate becomes a problem which has to be considered by many thermal power plants.
The small steam turbine is used for replacing a motor to drive equipment with larger electric power, such as a draught fan, a feed pump and the like, so that the power consumption of the equipment in a plant can be obviously reduced, and the small steam turbine is widely applied to a power plant at present. The steam-driven equipment utilizes the steam produced by the boiler of the unit as an energy source, can effectively improve the energy consumption level of the unit, but also has the following defects:
1. the starting process is complicated, the consumed time is long, and the load speed of the unit and the net belt is influenced. In the starting process of the small steam turbine, 4-5 hours are often needed until a fan, a water pump and the like reach normal operation rotating speed through turning, pipe warming, rushing, warming and speed fixing. Compared with the switching-on of an electric equipment switch, the equipment can be started within several minutes, the time and the labor are obviously wasted, and the starting grid-connected speed of the unit is tired.
2. The shutdown process is complicated and takes a long time. A steam turbine turning motor needs to be additionally equipped. After the steam-driven equipment is normally stopped or is stopped in an accident, in order to ensure that the main shaft of the steam turbine is not damaged, the shaft seal needs to be maintained and a turning gear is put into the shaft seal, the main shaft is kept at a rotating speed, the machine can be completely stopped after 2-3 hours, and the whole stopping process takes a long time.
The permanent magnet coupler is also called a magnetic coupling and a permanent magnet transmission device. The magnetic rotor mainly comprises a conductor rotor, a magnetic rotor and a controller. Generally, the conductor rotor is connected to the motor shaft, the permanent magnet rotor is connected to the shaft of the working machine, there is an air gap (called air gap) between the conductor rotor and the permanent magnet rotor, and there is no mechanical connection for transmitting torque. Therefore, a soft (magnetic) connection is formed between the motor and the working machine, and the torque and the rotating speed of the working machine shaft are changed by adjusting the air gap. Because of the difference of air gap adjusting modes, the permanent magnet eddy current transmission device is divided into different types such as a standard type, a delay type, a speed regulation type and the like.
The permanent magnet coupler integrates non-contact and super-elastic (soft) transmission, can greatly reduce impact and vibration, and reduces the starting current of equipment. Meanwhile, the transmission efficiency is high, and the service life is long.
How to effectively combine the power saving advantage of the pneumatic equipment and the quick characteristic of the electric equipment and give full play to the advantages of the two is a problem worthy of research.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome above-mentioned prior art's shortcoming, provide a vapour electric three driving assembly that permanent magnet coupler different axle was arranged, this driving assembly has the characteristics of saving the electric energy, start and shut down easy operation, consuming time shorter.
In order to achieve the above object, the steam-electric three-source power assembly with the different-axis arrangement of the permanent magnet coupler of the present invention comprises a control system, a steam turbine, a first speed-regulating permanent magnet coupler, an electric motor, a second speed-regulating permanent magnet coupler, a pneumatic motor and a third speed-regulating permanent magnet coupler;
an output shaft of the steam turbine is connected with a first input shaft of the speed reducer through a first speed-regulating permanent magnet coupler, an output shaft of the motor is connected with a second input shaft of the speed reducer through a second speed-regulating permanent magnet coupler, an output shaft of the pneumatic motor is connected with a third input shaft of the speed reducer through a third speed-regulating permanent magnet coupler, and an output shaft of the speed reducer is connected with external rotating machinery;
the control system is connected with the steam turbine, the first speed-regulating permanent magnet coupler, the motor, the second speed-regulating permanent magnet coupler, the pneumatic motor and the third speed-regulating permanent magnet coupler.
The speed reducer is a spiral umbrella speed reducer or a helical gear speed reducer.
The utility model discloses following beneficial effect has:
the steam-electricity three-source power assembly that permanent magnet coupler different shafts arranged when concrete operation, utilize the steam turbine, motor and pneumatic motor are as the power supply respectively in different stages, be starting the initial stage promptly, regard as the power supply with the motor, at the normal operating stage, regard as the power supply with the steam turbine, at the shut down stage, regard as the power supply with pneumatic motor, can exert quick start-stop advantage that motor drive has, can exert the low power consumption advantage that steam turbine drive has again, excellent comprehensive efficiency has, and save the electric energy, utilize three speed governing type permanent magnet coupler to realize the steam turbine simultaneously, motor and pneumatic motor thoroughly intervene and withdraw from, compare with current steam-electricity dual drive equipment, the starting process is more steady, switching process disturbance is littleer, the concurrent operation is comparatively simple, it is consuming time shorter.
Furthermore, when the steam turbine is in fault tripping, the motor is started, the function of steam-driven switching and electric driving under the accident condition is achieved, and the availability and the reliability of the equipment are greatly improved.
Furthermore, the pneumatic motor is used as a turbine stopping and turning device, and compared with an independent small motor, the energy-saving and cost-saving device has obvious energy-saving and cost advantages.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Wherein, 1 is a steam turbine, 2 is a first speed-regulating permanent magnet coupler, 3 is a motor, 4 is a second speed-regulating permanent magnet coupler, 5 is a speed reducer, 6 is a third speed-regulating permanent magnet coupler, and 7 is a pneumatic motor.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings:
referring to fig. 1, the steam-electric three-source power assembly with different-axis arrangement of permanent magnet couplers of the present invention includes a control system, a steam turbine 1, a first speed-regulating permanent magnet coupler 2, a motor 3, a second speed-regulating permanent magnet coupler 4, a pneumatic motor 7, and a third speed-regulating permanent magnet coupler 6; an output shaft of the steam turbine 1 is connected with a first input shaft of a speed reducer 5 through a first speed regulation type permanent magnet coupler 2, an output shaft of a motor 3 is connected with a second input shaft of the speed reducer 5 through a second speed regulation type permanent magnet coupler 4, an output shaft of a pneumatic motor 7 is connected with a third input shaft of the speed reducer 5 through a third speed regulation type permanent magnet coupler 6, and an output shaft of the speed reducer 5 is mechanically connected with external rotating machinery; the control system is connected with the steam turbine 1, the first speed-regulating permanent magnet coupler 2, the motor 3, the second speed-regulating permanent magnet coupler 4, the pneumatic motor 7 and the third speed-regulating permanent magnet coupler 6, and preferably, the speed reducer 5 is a spiral bevel speed reducer or a helical tooth speed reducer.
The utility model discloses a concrete working process does:
the steam turbine 1 utilizes the self-produced steam of the boiler as the energy source, drives the impeller rotatory to produce power, rethread first speed governing type permanent magnet coupler 2 and speed reducer 5 finally drive and rotate mechanical work, and the theory of operation of first speed governing type permanent magnet coupler 2 is: the torque transmitted to the speed reducer 5 by the steam turbine 1 is adjusted by adjusting the size of the air gap between the conductor disc and the magnet disc, wherein the torque continuously changes from 0 to a rated value range, and the stable intervention and stable exit of a power source are realized.
The motor 3 is connected with the speed reducer 5 through the second speed regulation type permanent magnet coupler 4, and the second speed regulation type permanent magnet coupler 4 mainly functions to reduce large torque impact at the moment of starting, reduce starting current of equipment and realize stable intervention and exit of a power source.
The pneumatic motor 7 uses compressed air as a power source, then uses high-pressure compressed air to push the inner impeller to rotate, then transmits power to the speed reducer 5 through the output shaft and the third speed-regulating permanent magnet coupler 6, finally drives the rotating machinery to rotate at a low speed, and simultaneously drives the low-speed turning gear of the steam turbine 1.
During working, the system is divided into a starting initial stage, a normal operation stage and a shutdown stage;
in the initial stage of starting, the load carried by the rotating machine is light, the output of the rotating machine is required to be not more than 30% of the rated output, and the low-power motor 3 is used as a power source in the stage.
In the normal operation stage, the output of the rotating machine is required to be within the range of 30-100% of rated output and can be continuously adjusted, and the steam turbine 1 is used as a power source in the stage.
And in the shutdown stage, the load of the rotating machinery is 0, the equipment is only required to rotate at a low speed at the moment, the normal turning of the steam turbine 1 is ensured, and the pneumatic motor 7 is used as a power source in the stage.
The specific application process is as follows:
1) air gaps between conductor discs and magnet discs in the first speed-regulating permanent magnet coupler 2, the second speed-regulating permanent magnet coupler 4 and the third speed-regulating permanent magnet coupler 6 are positioned at the maximum position, and the torque transmission among the steam turbine 1, the electric motor 3, the pneumatic motor 7 and the speed reducer 5 is 0;
2) starting the motor 3, gradually reducing the air gap between the conductor disc and the magnet disc in the second speed-regulating permanent magnet coupler 4, so that the torque transmitted between the motor 3 and the speed reducer 5 is gradually increased from zero to a rated value, the output of the rotating machine is continuously adjusted within the range of 0-30% of the rated output at the moment, the requirement of the initial starting stage is met, meanwhile, the steam turbine 1 performs pipe warming and impulse rotation, after the steam turbine 1 operates stably, the power source switching is requested, and the switching process is as follows: firstly, the rotating speed of the steam turbine 1 is increased to be 10r/min-20r/min higher than the rotating speed of the motor 3, then the air gap between the conductor disc and the magnet disc in the first speed-regulating permanent magnet coupler 2 is gradually reduced, the power of the steam turbine 1 starts to intervene, when the rotating speed of the rotating machine starts to increase, the motor 3 is stopped, the air gap between the conductor disc and the magnet disc in the second speed-regulating permanent magnet coupler 4 is increased, the motor 3 completely exits, and at the moment, the power source of the rotating machine is switched to the steam turbine 1 without interference by the motor 3.
In the normal operation stage, when the steam turbine 1 is in fault trip, the motor 3 is started, and the air gap between the conductor disc and the magnet disc in the second speed-regulating permanent magnet coupler 4 is directly regulated to the minimum value so as to transmit the maximum torque;
when the equipment needs to be shut down, when the motor 3 works at the moment, the air gap between the conductor disc and the magnet disc in the second speed regulation type permanent magnet coupler 4 is increased to disconnect the elastic connection between the motor 3 and the speed reducer 5, when the steam turbine 1 works at the moment, as the turning after the shutdown is involved, the pneumatic motor 7 is started when the steam turbine 1 starts to be shut down gradually, and during the period, the air gaps between the conductor disc and the magnet disc in the first speed regulation type permanent magnet coupler 2 and the third speed regulation type permanent magnet coupler 6 are adjusted according to the rotating speed required by the turning, so that the normal turning rotating speed of the steam turbine 1 can be maintained.
Claims (2)
1. A steam-electric three-source power assembly with permanent magnet couplers arranged in different shafts is characterized by comprising a control system, a steam turbine (1), a first speed-regulating permanent magnet coupler (2), a motor (3), a second speed-regulating permanent magnet coupler (4), a pneumatic motor (7) and a third speed-regulating permanent magnet coupler (6);
an output shaft of the steam turbine (1) is connected with a first input shaft of the speed reducer (5) through a first speed regulation type permanent magnet coupler (2), an output shaft of the motor (3) is connected with a second input shaft of the speed reducer (5) through a second speed regulation type permanent magnet coupler (4), an output shaft of the pneumatic motor (7) is connected with a third input shaft of the speed reducer (5) through a third speed regulation type permanent magnet coupler (6), and an output shaft of the speed reducer (5) is mechanically connected with external rotating machinery;
the control system is connected with the steam turbine (1), the first speed-regulating permanent magnet coupler (2), the motor (3), the second speed-regulating permanent magnet coupler (4), the pneumatic motor (7) and the third speed-regulating permanent magnet coupler (6).
2. The steam-electric three-source power assembly with the permanent magnet coupler coaxially arranged according to claim 1, wherein the speed reducer (5) is a spiral bevel speed reducer or a helical tooth speed reducer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021467485.2U CN212406816U (en) | 2020-07-22 | 2020-07-22 | Steam-electric three-source power assembly with permanent magnet coupler arranged in different shafts |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021467485.2U CN212406816U (en) | 2020-07-22 | 2020-07-22 | Steam-electric three-source power assembly with permanent magnet coupler arranged in different shafts |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212406816U true CN212406816U (en) | 2021-01-26 |
Family
ID=74405033
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021467485.2U Active CN212406816U (en) | 2020-07-22 | 2020-07-22 | Steam-electric three-source power assembly with permanent magnet coupler arranged in different shafts |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212406816U (en) |
-
2020
- 2020-07-22 CN CN202021467485.2U patent/CN212406816U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11329583B2 (en) | Generalized frequency conversion system for steam turbine generator unit | |
| CN201288679Y (en) | Dual driving apparatus for steam turbine and electric motor | |
| CN201884082U (en) | Driving system utilizing waste heat steam | |
| CN109519232B (en) | Synchronous automatic regulation control method for rotation speed of SHRT unit frequency converter and steam turbine | |
| CN104405655A (en) | Energy-saving type boiler induced-draft fan driving system applied to thermal power plant | |
| CN111412023A (en) | Coordination control method for realizing stable operation of steam-electricity dual-drive system | |
| CN111734502A (en) | Steam-electricity three-source power assembly with permanent magnet coupler arranged in different shafts and working method thereof | |
| CN212406816U (en) | Steam-electric three-source power assembly with permanent magnet coupler arranged in different shafts | |
| CN111663972A (en) | Arrange high-efficient heating system of secondary reheat unit in | |
| CN105545770A (en) | Shafting capable of achieving steam-electric alternate drive and combined drive of large-scale static-blade adjustable axial flow fan | |
| CN111287805A (en) | High-efficient nimble vapour electricity hybrid power equipment | |
| CN114718682B (en) | Sintering steam dragging system and method | |
| CN202550961U (en) | Frequency conversion energy-saving device of low-voltage three-phase asynchronous motor control system | |
| CN215719675U (en) | Power frequency/frequency conversion undisturbed switching energy-saving driving system of axial flow fan with adjustable moving blades | |
| CN115450593A (en) | Steam-electricity double-drive system, skid-mounted equipment and steam-electricity double-drive method | |
| CN208845236U (en) | The turbine generator water supply system of function cogeneration of heat and power | |
| CN210859087U (en) | Automatic control device for air compressor unit of rail car | |
| CN209369996U (en) | Feed pump with arrangement of clutch | |
| CN219774380U (en) | Blower unit control device for turbine and motor opposite-side coaxial driving | |
| CN213684252U (en) | Steam-electricity dual-drive system | |
| CN215979514U (en) | Steam energy utilization device | |
| CN210974735U (en) | Five-machine redundancy unit of blast furnace | |
| CN215486673U (en) | Steam-electricity different-side coaxial-driven blower unit | |
| CN114039453B (en) | Gas turbine generator set started by alternating current exciter of brushless generator and starting method thereof | |
| CN212454554U (en) | High-efficient nimble vapour electricity hybrid power equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |