CN109888973A - Thermal power plant air cooling blower fan alternating current asynchronous servo speed control device - Google Patents
Thermal power plant air cooling blower fan alternating current asynchronous servo speed control device Download PDFInfo
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- CN109888973A CN109888973A CN201910066187.8A CN201910066187A CN109888973A CN 109888973 A CN109888973 A CN 109888973A CN 201910066187 A CN201910066187 A CN 201910066187A CN 109888973 A CN109888973 A CN 109888973A
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- alternating current
- air cooling
- drive shaft
- current asynchronous
- governor
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- 238000001816 cooling Methods 0.000 title claims abstract description 41
- 230000002452 interceptive effect Effects 0.000 claims abstract description 9
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 13
- 230000008878 coupling Effects 0.000 claims description 12
- 238000010168 coupling process Methods 0.000 claims description 12
- 238000005859 coupling reaction Methods 0.000 claims description 12
- 238000009434 installation Methods 0.000 claims description 2
- 238000000605 extraction Methods 0.000 claims 1
- 238000005303 weighing Methods 0.000 claims 1
- 230000033228 biological regulation Effects 0.000 abstract description 10
- 238000012423 maintenance Methods 0.000 abstract description 8
- 239000003638 chemical reducing agent Substances 0.000 description 6
- 238000013461 design Methods 0.000 description 4
- 230000001360 synchronised effect Effects 0.000 description 3
- 230000004888 barrier function Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000005347 demagnetization Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
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Abstract
The invention discloses a kind of thermal power plant air cooling blower fan alternating current asynchronous servo speed control devices, including cage AC asynchronous electric motor, alternating current asynchronous servo governor, blower and fan blade, it is characterized in that further including Special support bearing and human-computer interactive control system on the spot, spring bearing is fixedly connected with motor, while fan blade being driven to rotate；It installs incremental encoder A additional on motor and air cooling blower fan special governor is accessed by private cable, cage AC asynchronous electric motor directly drives fan blade by Special support bearing；Alternating current asynchronous servo governor receives the control instruction driving cage AC asynchronous electric motor and control rotation speed of fan of DCS；A set of rotation speed of fan man-machine interactive system has also been devised in the present invention, debugging maintenance personnel can carry out fast parameter setting and debugging to alternating current asynchronous servo governor by man-machine interactive system, the requirement to maintenance personnel is reduced, speed regulation accuracy improves 1000 times or more.
Description
Technical field
The present invention relates to 16 grades of thermal power plant slow-speed of revolution cage AC asynchronous electric motor automation fields.
Background technique
Traditional air cooling blower fan is by cage AC asynchronous electric motor, speed reducer, yielding coupling, frequency converter and control system group
At that there are energy-saving effects is unobvious, speed reducer maintenance is big, frequency converter failure rate is higher, fan easily invert, standby redundancy is held high
The problems such as expensive, difficulty in starting, speed regulation are inaccurate, frequency converter and big blower calorific value.
The fan speed regulation device that the present invention selects is alternating current asynchronous servo governor, precision, response speed, slow-speed of revolution torque
Etc. performances it is more excellent than synchronous servo, aim at the design of common cage AC asynchronous electric motor, solve synchronous servo Permanent Magnet and Electric
Machine demagnetization, high/low temperature are difficult to the problems such as high-power, stall overcurrent loss of excitation, make air cooling blower fan with common squirrel-cage alternating current asynchronous
The speed regulation of electric-machine directly-driven air cooling blower fan is possibly realized.
Summary of the invention
The object of the present invention is to provide a kind of thermal power plant air cooling blower fan alternating current asynchronous servo speed control device, middle and slow speed of revolution
In the case of it is more energy saving, can fully phase out speed reducer under middle and slow speed of revolution operating condition, the cancellation of speed reducer can reduce maintenance and
Maintenance cost avoids blower from inverting, and accurately adjusts rotation speed of fan by automatic control system.
The technical scheme is that a kind of thermal power plant air cooling blower fan alternating current asynchronous servo speed control device, including sky
Air-cooler special governor, motor, alternating current asynchronous servo governor, blower and fan blade, it is characterized in that further including dedicated branch
Bearing and on the spot human-computer interactive control system are supportted, spring bearing is fixedly connected with motor, while fan blade being driven to rotate.
It installs incremental encoder additional on motor and air cooling blower fan special governor is accessed by private cable, motor passes through
Special support bearing directly drives fan blade；Alternating current asynchronous servo governor receives control instruction driving motor and the control of DCS
Rotation speed of fan processed；The spring bearing is by axial thrust disk, shaft coupling, drive shaft, the first radial ball bearing, O-ring seal,
Blower drive shaft, flange base, the second radial ball bearing, blower drive shaft extend pedestal, drive shaft thrust block pad composition.
Preferably, axial thrust disk is mounted on flange base lower part, combines closely on one side with drive shaft thrust block pad top, separately
It combines closely on one side with drive shaft thrust block pad lower part.
Preferably, the second radial ball bearing is mounted on axial thrust disk lower part and closely entangles blower drive shaft.
Preferably, it is close to be mounted on blower drive shaft extension pedestal end driving shaft pilot sleeve top for the first radial ball bearing
Entangle blower drive shaft.
Preferably, O-ring seal is mounted on blower drive shaft extension pedestal driving shaft pilot sleeve and blower drive shaft lead division
Position, O-ring seal tightly entangle blower drive shaft 6.
Preferably, motor is fixed on flange base and connects with shaft coupling, and the shaft coupling other end connects drive shaft, driving
Axis directly drives fan blade by blower drive shaft, and blower axial force is balanced by axial thrust disk, and blower radial force passes through
Second radial roller bearing and the first radial ball bearing balance.
Preferably, there are three types of control models for alternating current asynchronous servo governor: remote control DCS control model controls on the spot
Mode and debugging mode, realization accurately control rotation speed of fan.
The motor is cage AC asynchronous electric motor.
Advantages of the present invention:
1, the present invention directly drives 16 grades of slow-speed of revolution cage AC asynchronous electric motors by alternating current asynchronous servo governor H,
It installs incremental encoder A additional on motor and governor is accessed by private cable, this governor has more excellent than synchronous servo
It is anisotropic can, torque is 10 times or so of frequency converter V/F mode under slow-speed of revolution operating condition, in the case of middle and slow speed of revolution than frequency converter more supernumerary segment
Energy.The raising of torque can fully phase out speed reducer under middle and slow speed of revolution operating condition, and the cancellation of speed reducer can reduce maintenance and dimension
Protect cost.Alternating current asynchronous servo governor H can be such that motor is in the lock state in the case where stoppage in transit, and blower is made to avoid occurring
Reversion.Alternating current asynchronous servo governor H replaces frequency converter timing, and speed regulation accuracy improves 1000 times or more.Pass through automatic control
System accurately adjusts rotation speed of fan.
2, design machined the direct connection driving spring bearing of a kind of Low speed electric motor and blower, this support device is fixedly connected
Motor, while fan blade being driven to rotate.
3, a set of rotation speed of fan man-machine interactive system is devised, debugging maintenance personnel can be by man-machine interactive system to friendship
It flows asynchronous servo governor and carries out fast parameter setting and debugging, reduce the requirement to maintenance personnel.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of Special supporting device of the present invention.
Fig. 2 is the scheme of installation of motor of the present invention.
Fig. 3 is control system figure of the invention.
Fig. 4 is the partial enlargement diagram of Fig. 3.
Drawing reference numeral: axial thrust disk 41, shaft coupling 42, drive shaft 43, the first radial ball bearing 44, O-ring seal
45, blower drive shaft 46, motor 47, flange base 48, the second radial ball bearing 49, blower drive shaft extension pedestal 20, wind
Machine blade 21, drive shaft thrust block pad 22.
Specific embodiment
Below in conjunction with attached drawing, the present invention will be described in detail, the description of this part be only it is exemplary and explanatory, no
It should be regarded as the limitation to presently disclosed techniques content.
In Fig. 1, Fig. 2, a kind of thermal power plant air cooling blower fan alternating current asynchronous servo speed control device, including squirrel-cage exchange
Asynchronous machine 47, alternating current asynchronous servo governor H, blower and fan blade 21, it is characterized in that further include Special support bearing and
Human-computer interactive control system on the spot, spring bearing are fixedly connected with motor 47, while fan blade 21 being driven to rotate；On motor 47
It installs incremental encoder A additional and air cooling blower fan special governor K is accessed by private cable, cage AC asynchronous electric motor 47 is logical
It crosses Special support bearing and directly drives fan blade 21；The control instruction that alternating current asynchronous servo governor H receives DCS drives mouse cage
Formula AC induction motor 47 and control rotation speed of fan；The spring bearing is by axial thrust disk 41, shaft coupling 42, drive shaft 43,
First radial ball bearing 44, O-ring seal 45, blower drive shaft 46, flange base 48, the second radial ball bearing 49, wind
Machine drive shaft extends pedestal 20, and drive shaft thrust block pad 22 forms.
The spring bearing is by axial thrust disk 41, shaft coupling 42, drive shaft 43, and the first radial ball bearing 44 is O-shaped close
Seal 45, blower drive shaft 46, flange base 48, the second radial ball bearing 49, blower drive shaft extend pedestal 20, drive shaft
Thrust block pad 22 forms.
Axial thrust disk 41 is mounted on 48 lower part of flange base, combines closely on one side with 22 top of drive shaft thrust block pad, and one
Face and 22 lower part of drive shaft thrust block pad are combined closely, and balancing axial thrust is played the role of.
Second radial ball bearing 49 is mounted on 41 lower part of axial thrust disk and closely entangles blower drive shaft 46, plays balance
The effect of a part of radial force.
First radial ball bearing 44 is mounted on blower drive shaft extension 20 end driving shaft pilot sleeve top of pedestal and closely covers
Firmly blower drive shaft 46 plays the role of a part of radial force of balance.
O-ring seal 45 is mounted on blower drive shaft and extends 20 driving shaft pilot sleeve of pedestal and 46 lead division of blower drive shaft
Position, O-ring seal 45 tightly entangle blower drive shaft 46, prevent lubricating oil from oozing out.
Motor 47 is fixed on flange base 48 and connects with shaft coupling 42, and 42 other end of shaft coupling connects drive shaft 43,
Drive shaft 43 directly drives fan blade 21 by blower drive shaft 46, and blower axial force is balanced by axial thrust disk 41, wind
Machine radial force passes through the second radial roller bearing 49, the first radial ball bearing 44 balance.
Thermal power plant air cooling blower fan alternating current asynchronous servo governor H receives DCS (Distributed Control System) centralized control, leads to
It crosses DCS (Distributed Control System) transmission revolving speed control instruction and accurately controls rotation speed of fan to air cooling blower fan special governor K, it is air-cooled
Blower special governor K drives common cage AC asynchronous electric motor 47, and common cage AC asynchronous electric motor 47 passes through dedicated
Design spring bearing directly drives fan blade 21.Alternating current asynchronous servo governor H design has human-computer interactive control system on the spot,
The functions such as model selection, parameter setting and debugging may be implemented, there are three types of control models: remote control DCS (collecting and distributing control system
System) control model, on the spot control model and debugging mode, it realizes and air cooling blower fan revolving speed is accurately controlled.
In Fig. 3, Fig. 4,1 is the enabled instruction of alternating current asynchronous servo governor.2 refer to for the stopping of alternating current asynchronous servo governor
It enables.3 be the enabled instruction of alternating current asynchronous servo governor.4 instruct for alternating current asynchronous servo governor failure reset.5 is different to exchange
Walk servo governor positive and negative rotation instruction.The 6 instruction common ends 24VDC.7 be alternating current asynchronous servo governor run signal.8 exchanges are different
Walk servo governor stop signal.9 be alternating current asynchronous servo governor fault-signal.10 prepare for alternating current asynchronous servo governor
Good signal.11 be alternating current asynchronous servo governor 0-10V rotary speed instruction positive signal.12 be alternating current asynchronous servo governor 0-10V
Rotary speed instruction negative signal.13 be alternating current asynchronous servo governor 0-10V current feedback positive signal.14 adjust the speed for alternating current asynchronous servo
Device 0-10V current feedback negative signal.15 be alternating current asynchronous servo governor 0-10V Voltage Feedback positive signal.16 be alternating current asynchronous
Servo governor 0-10V Voltage Feedback negative signal.17 be alternating current asynchronous servo governor 0-10V speed feedback positive signal.18 are
Alternating current asynchronous servo governor 0-10V speed feedback negative signal.19 be the negative letter of alternating current asynchronous servo governor 0-10V speed feedback
Number.A is incremental encoder.B is display screen.C is load switch.D is alternating current asynchronous servo governor DO interface 24VDC-.E
For alternating current asynchronous servo governor DO interface 24VDC-.F is alternating current asynchronous servo governor DO interface.K is that air cooling blower fan is dedicated
Governor.H is alternating current asynchronous servo governor.23 be to send DCS (Distributed Control System) run signal.24 send DCS (collecting and distributing control
System) stop signal.25 send DCS (Distributed Control System) positive and negative rotaring signal.26 be to send DCS (Distributed Control System) signal
The common end 24VDC-.27 issue enabled instruction for DCS (Distributed Control System).28 issue stopping for DCS (Distributed Control System)
Instruction.29 issue failure reset instruction for DCS (Distributed Control System).30, which issue positive and negative rotation for DCS (Distributed Control System), refers to
It enables.31 instruct anode for the rotational speed regulation 4-20Ma that DCS (Distributed Control System) issues.32 send out for DCS (Distributed Control System)
Rotational speed regulation 4-20Ma out instructs cathode.33 is positive to send DCS (Distributed Control System) electric current 4-20Ma to feed back.34 be to send
DCS (Distributed Control System) electric current 4-20Ma feeds back cathode.35 be to send DCS (Distributed Control System) revolving speed 4-20Ma feedback just
Pole.36 be that DCS (Distributed Control System) revolving speed 4-20Ma is sent to feed back cathode.
In Fig. 3, enabled instruction 1, halt instruction 2 are issued by alternating current asynchronous servo governor H, enable to instruct 3, failure multiple
It is air-cooled that bit instruction 4, positive and negative rotation instruct 5, run signal 7, stop signal 8, fault-signal 9, rotary speed instruction 11 and 12 to control together
Start and stop, positive and negative rotation and the speed preset of blower special governor K.
Air cooling blower fan special governor K is passed through enabled instruction 1, halt instruction by the control of alternating current asynchronous servo governor H
2, instruction 3 is enabled, failure reset instruction 4, positive and negative rotation instruction 5 control the start and stop of air cooling blower fan special governor K together and positive and negative
Turn.
Air cooling blower fan special governor K passes through acquisition alternating current asynchronous servo governor H run signal 7, stop signal 8, event
Barrier signal 9, to get out signal 10,0-10V rotary speed instruction positive signal 11,0-10V rotary speed instruction negative signal 12,0-10V electric current anti-
Present positive signal 13,0-10V current feedback negative signal 14,0-10V Voltage Feedback positive signal 15,0-10V Voltage Feedback negative signal 16,
0-10V speed feedback positive signal 17,0-10V speed feedback negative signal 18 to air cooling blower fan carry out every operating parameter monitoring and
Protection.
Under remote control mode, alternating current asynchronous servo governor H receives DCS (Distributed Control System) by DI interface and sends out
Enabled instruction 27, halt instruction 28, failure reset instruction 29, positive and negative rotation instruction 30 out, pass through alternating current asynchronous servo governor H
AI interface receive DCS (Distributed Control System) sending rotational speed regulation instruction 31 and 32, pass through alternating current asynchronous servo governor H
AO interface to DCS (Distributed Control System) issue speed feedback 35 and 36, current feedback 33 and 34, pass through alternating current asynchronous servo
The DO interface of governor H issues run signal 23, stop signal 24, positive and negative rotaring signal 25 to DCS (Distributed Control System), passes through
The DO interface of alternating current asynchronous servo governor H issues enabled instruction 1 to air cooling blower fan special governor K, halt instruction 2, enables
Instruction 3, failure reset instruction 4, positive and negative rotation instruct 5 start and stop, positive and negative rotation and and event for controlling air cooling blower fan special governor K together
Barrier resets, and issues speed 0-10V revolving speed to air cooling blower fan special governor K by the AO interface of alternating current asynchronous servo governor H
Instruction 11 and 12 controls air cooling blower fan special governor K revolving speed together.
Alternating current asynchronous servo governor H is under control model on the spot, and operator is by showing that screen B can issue simulation
Speed-regulating instruction, start stop operation, positive and negative rotation control and failure reset are measured, all operational orders that display screen B is issued pass through
RS485 communication is transmitted to alternating current asynchronous servo governor H, and by the DO interface of alternating current asynchronous servo governor H to air-cooled wind
Machine special governor K issues enabled instruction 1, halt instruction 2, enabled instruction 3, failure reset instruction 4,5 control of positive and negative rotation instruction
Start and stop, positive and negative rotation and and the failure reset of air cooling blower fan special governor K；Pass through the AO interface of alternating current asynchronous servo governor H
0-10V rotary speed instruction 11 and 12, which is issued, to air cooling blower fan special governor K controls air cooling blower fan special governor K revolving speed together.
Display screen B is communicated by RS485 and alternating current asynchronous servo governor H, and display governor state parameter is deposited
Storage and display historical data are convenient for parameter setting and model selection by way of touch, and air cooling blower fan special governor K passes through
It acquires the real-time tach signal of motor incremental encoder A and accurate closed-loop control, the dedicated tune of air cooling blower fan is carried out to 47 revolving speed of motor
Fast device K passes through the rotation speed regulation of three-phase power line driving motor 47.
Load switch C controls air cooling blower fan special governor K 380VAC on/off, and to the dedicated speed regulation of air cooling blower fan
Device K plays overload flow protection.
It should finally be noted above embodiments are only the more representational examples of the present invention.On it is clear that the invention is not restricted to
Embodiment is stated, acceptable there are many deformations.It is to the above embodiments any simple according to the technical essence of the invention
Modification, equivalent variations and modification, are considered as belonging to the scope of protection of the present invention.
Claims (8)
1. a kind of thermal power plant air cooling blower fan alternating current asynchronous servo speed control device, including air cooling blower fan special governor K, motor
(47), alternating current asynchronous servo governor H, blower and fan blade (21), it is characterized in that further including Special support bearing and on the spot
Human-computer interactive control system, spring bearing are fixedly connected with motor (47), while fan blade (21) being driven to rotate；In motor (47)
Upper installation incremental encoder A simultaneously accesses air cooling blower fan special governor K by private cable, and motor (47) passes through Special support
Bearing directly drives fan blade (21)；Alternating current asynchronous servo governor H receives control instruction driving motor (47) and the control of DCS
Rotation speed of fan processed；The spring bearing is by axial thrust disk (41), shaft coupling (42), drive shaft (43), the first radial ball axis
It holds (44), O-ring seal (45), blower drive shaft (46), flange base (48), the second radial ball bearing (49), blower drives
Moving axis extends pedestal (20), drive shaft thrust block pad (22) composition.
2. thermal power plant air cooling blower fan alternating current asynchronous servo speed control device as claimed in claim 1, it is characterized in that axial
Thrust disc (41) is mounted on flange base (48) lower part, combines closely on one side with drive shaft thrust block pad (22) top, another side and
It combines closely drive shaft thrust block pad (22) lower part.
3. thermal power plant air cooling blower fan alternating current asynchronous servo speed control device as claimed in claim 1, it is characterized in that second
Radial ball bearing (49) is mounted on axial thrust disk (41) lower part and closely entangles blower drive shaft (46).
4. thermal power plant air cooling blower fan alternating current asynchronous servo speed control device as claimed in claim 1, it is characterized in that first
Radial ball bearing (44) is mounted on blower drive shaft extension pedestal (20) end driving shaft pilot sleeve top and closely entangles blower drive
Moving axis (46).
5. thermal power plant air cooling blower fan alternating current asynchronous servo speed control device as claimed in claim 1, it is characterized in that O-shaped close
Seal (45) is mounted on blower drive shaft and extends pedestal (20) driving shaft pilot sleeve and blower drive shaft (46) extraction position, O-shaped close
Seal (45) tightly entangles blower drive shaft (46).
6. thermal power plant air cooling blower fan alternating current asynchronous servo speed control device as claimed in claim 1, it is characterized in that motor
(47) it is fixed on flange base (48) and is driven with shaft coupling (42) connection, shaft coupling (42) other end connection drive shaft (43)
Moving axis (43) is directly driven fan blade (21) by blower drive shaft (46), and blower axial force is flat by axial thrust disk (41)
Weighing apparatus, blower radial force pass through the second radial roller bearing (49) and the first radial ball bearing (44) balance.
7. thermal power plant air cooling blower fan alternating current asynchronous servo speed control device as claimed in claim 1, it is characterized in that exchange
There are three types of control models by asynchronous servo governor H: remote control DCS control model, on the spot control model and debugging mode are realized
Rotation speed of fan is accurately controlled.
8. thermal power plant air cooling blower fan alternating current asynchronous servo speed control device as claimed in claim 1, it is characterized in that described
Motor (47) is cage AC asynchronous electric motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910066187.8A CN109888973A (en) | 2019-01-24 | 2019-01-24 | Thermal power plant air cooling blower fan alternating current asynchronous servo speed control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910066187.8A CN109888973A (en) | 2019-01-24 | 2019-01-24 | Thermal power plant air cooling blower fan alternating current asynchronous servo speed control device |
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| Publication Number | Publication Date |
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| CN109888973A true CN109888973A (en) | 2019-06-14 |
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| CN201910066187.8A Withdrawn CN109888973A (en) | 2019-01-24 | 2019-01-24 | Thermal power plant air cooling blower fan alternating current asynchronous servo speed control device |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202833624U (en) * | 2012-10-08 | 2013-03-27 | 台州佳迪泵业有限公司 | Thrust bearing |
| CN204794796U (en) * | 2015-06-03 | 2015-11-18 | 广州智光电气股份有限公司 | Thermal power unit air cooling island cooling unit's controlling means |
| CN108768240A (en) * | 2018-07-09 | 2018-11-06 | 广东水利电力职业技术学院（广东省水利电力技工学校） | A kind of AC induction motor servo drive system and control method |
| CN209593203U (en) * | 2019-01-24 | 2019-11-05 | 华能铜川照金煤电有限公司 | Thermal power plant air cooling blower fan alternating current asynchronous servo speed control device |
-
2019
- 2019-01-24 CN CN201910066187.8A patent/CN109888973A/en not_active Withdrawn
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202833624U (en) * | 2012-10-08 | 2013-03-27 | 台州佳迪泵业有限公司 | Thrust bearing |
| CN204794796U (en) * | 2015-06-03 | 2015-11-18 | 广州智光电气股份有限公司 | Thermal power unit air cooling island cooling unit's controlling means |
| CN108768240A (en) * | 2018-07-09 | 2018-11-06 | 广东水利电力职业技术学院（广东省水利电力技工学校） | A kind of AC induction motor servo drive system and control method |
| CN209593203U (en) * | 2019-01-24 | 2019-11-05 | 华能铜川照金煤电有限公司 | Thermal power plant air cooling blower fan alternating current asynchronous servo speed control device |
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Application publication date: 20190614 |
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