CN201433848Y - Full-digital integrated cylindrical valve digital quantization tank - Google Patents
Full-digital integrated cylindrical valve digital quantization tank Download PDFInfo
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- CN201433848Y CN201433848Y CN2009200817869U CN200920081786U CN201433848Y CN 201433848 Y CN201433848 Y CN 201433848Y CN 2009200817869 U CN2009200817869 U CN 2009200817869U CN 200920081786 U CN200920081786 U CN 200920081786U CN 201433848 Y CN201433848 Y CN 201433848Y
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- 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
- Y02E10/20—Hydro energy
Abstract
The utility model belongs to the field of inlet valve control of water-turbine generator set, particularly to a full-digital integrated cylindrical valve digital quantization tank. The full-digital integrated cylindrical valve digital quantization tank comprises a tank body, a piston, a mechanical feedback mechanism, a servomotor displacement sensor, a feedback coupling mechanism, a coupling gear,a digital valve, a fluid control check valve and a stepping motor, wherein the digital valve is connected with the stepping motor, the coupling gear is mounted between the feedback coupling mechanismand the digital valve core, the servomotor displacement detecting sensor is mounted on the coupling gear, and the mechanical feedback mechanism is connected with the feedback coupling mechanism and the piston. The digital quantization tank provided by the utility model overcomes the defects of the prior electrohydraulic synchronization method, and has the advantages of higher reliability and control precision as well as simple structure and convenient installation, operation and maintenance compared with the prior electrohydraulic synchronization method.
Description
Technical field:
The utility model belongs to hydraulic generator unit inlet valve control field, is full digital integrated cylindrical valve digital quantization cylinder concretely.
Background technique:
At one of water power plant hydraulic generator unit inlet valve, promptly in the use of cylindrical valve, except that the design of cylindrical valve body, manufacturing, installation, the control of cylindrical valve, promptly how to guarantee many servomotors synchronously, become the key technical problem of cylindrical valve control.
At present, the extensive method of synchronization that adopts of domestic cylindrical valve lazy-tongs has two kinds: be respectively the mechanical synchronization mode and the electric liquid method of synchronization.
The mechanical synchronization mode is in the upper end of tubular valve body, arranges many hydraulic relay devices equably along circumference, and every servomotor lower end is fixed on the valve body.Gear is equipped with in the leading screw upper end of every servomotor, by chain all gears is moved simultaneously.Hydraulic relay device piston moves upward, and cylindrical valve is opened; Hydraulic relay device piston moves downward, and cylindrical valve cuts out.The same moved further of each servomotor piston is realized by the rolling screw pair of reversible transmission.Rolling screw pair is on the servomotor piston rod, fixes the nut of a rolling screw transmission, and nut connects turn-screw.Move when the servomotor piston is upper and lower, open, when closing cylindrical valve, the forward and reverse thereupon rotation of leading screw, gear by the leading screw upper end, vertical motion up and down with cylindrical valve becomes radially rotatablely moving of gear, the gear driven chain, the gear of other servomotors of interlock is with speed rotation, and react on its leading screw and realize many servomotors synchronously.The mechanical synchronization mode mainly relies on moving elements such as leading screw, chain to cooperatively interact, and guarantees that each servomotor is synchronized with the movement up and down; Rising, the descending motion of servomotor piston are driven by hydraulic control system.
The mechanical synchronization mode has following advantage:
(1) cylindrical valve open, close can be automatically, manually control;
(2) in debugging or electric when malfunctioning, still can be manually opened entirely, close cylindrical valve;
(3) pipeline is few, and tie point is few, and it is up to standard to help power plant;
(4) debugging, maintenance work are simply, conveniently.
The mechanical synchronization mode also has following shortcoming:
(1) synchronization accuracy can't quantize;
(2) the servomotor oil cylinder does not have self-adjusting ability, and chain is corrected ability to asynchronous oil cylinder takes place synchronously;
(3) can only constant speed open and close, can not open and close by arbitrary curve;
(4) the place spatial requirement is bigger on arranging.
The electricity liquid method of synchronization is made up of hydraulic control system and electric control system, and these two control system are indispensable.Hydraulic control system must be by the accurate control of electric control system, and electric control system must be carried out by hydraulic control system, could operate servomotor, drives cylindrical valve and opens and closes.
Based on the experience and the technology of the world today, all cylindrical valve control gear manufacturers mainly adopt at present, and feasible electric liquid synchronization scenario has two: coaxial oil motor scheme, servo proportion scheme.Main flow electricity liquid synchronization scenario is coaxial oil motor scheme.
Its advantage:
(1) cylindrical valve switch control law any adjustment able to programme;
(2) good to asynchronous servomotor rectification ability takes place;
(3) but follow procedure specifies keying speed to open and close control.
Its shortcoming:
(1) can not under any mode of operation, realize high-precise synchronization;
(2) control is complicated; System, pipeline, complex structure are unfavorable for that power plant is up to standard;
(3) system's installation, debugging, difficult in maintenance;
(4) arrange that in the place space requires bigger.
Along with the quickening of China's hydroelectric development progress, unit capacity, size are increasing, and the size of cylindrical valve is also increasing, and simplified weight is also more and more heavier, and the mechanical synchronization mode of original comparative maturity just demonstrated its inborn defective.Has only the synchronization control demand that adopts the electric liquid method of synchronization could satisfy present hydroelectric development large scale, big weight, big stroke cylindrical valve.But the practical effect of main aforementioned two kinds of electric liquid methods of synchronization of using is not very desirable at present.
The digital quantization cylinder that the utility model is related overcomes the shortcoming that has the electric liquid method of synchronization now, and is more simple in structure than existing electric liquid method of synchronization reliability height, control accuracy height, installation, operation, easy to maintenance.
Summary of the invention:
For solving the problems of the technologies described above, the technical solution adopted in the utility model is as follows:
A kind of full digital integrated cylindrical valve digital quantization cylinder, it is characterized in that: described digital quantization cylinder comprises cylinder body, piston, mechanical feedback mechanism, servomotor displacement transducer, back coupling mechanism, coupling wheel, digital valve, Pilot operated check valve, stepper motor, described digital valve links to each other with stepper motor, described coupling wheel is installed between back coupling mechanism and the digital valve spool, the servomotor displacement detecting sensor is installed on the described coupling wheel, and described mechanical feedback mechanism connects back coupling mechanism and piston.
The rolling screw transmission nut of described mechanical feedback mechanism is fixed on the piston;
The feedback drving sprial bar of described mechanical feedback mechanism is by back coupling mechanism, with coupling wheel, the coupling of digital valve spool spiral.
Described digital quantization cylinder is meant that hydraulic control device and cylindrical valve servomotor are integrated as a whole.
Described mechanical feedback mechanism is for reversing heliconid.
Described sensor is a multi-turn rotation absolute position encoder.
The utlity model has following advantage:
One, full digital integrated cylindrical valve digital quantization cylinder has been abandoned traditional driven control theory, adopts Active Control Mode.Traditional driven control is that controlling object is applied control signal, and actuator carries out, and with the motion state of sensor controlling object, the motion conditions of controlling object is fed back to controller.In controller, repeatedly compare, regulate, revise, form the close-loop feedback control system, make controlling object finally arrive predetermined target value with desired value.Around desired value, system is carrying out servo-actuated closed-loop feedback dynamic adjustments all the time.
The utility model servomotor piston motion control, be electrical system according to desired value, provide a certain amount of control impuls, hydraulic system just press the stack of digital quantization value automatically and is moved, until desired value.Generally, want to allow the servomotor piston walk how many displacement amounts exactly, just give servomotor amount of piston displacement ÷ digital quantization value individual control impuls, the servomotor piston is just walked given displacement amount automatically;
Two, whole system control (comprising electrical system and hydraulic system), from the hydraulic motion operation of stroke detection, control signal, servomotor, whole process has realized accurately digitized.The servomotor position probing adopts multi-turn rotation absolute position encoder.In design, strict guarantee servomotor piston moves 10mm, encoder rotation 1 circle.Encoder rotation output signal is exactly a standard digital signals.
The servomotor piston under the hydraulic oil operation, is to move with the digital quantization value.Control impuls and servomotor piston moving displacement have strict corresponding relationship.
Three, any open and close operation of cylindrical valve, servomotor all is a high-precise synchronization;
Four, to taking place, asynchronous operation servomotor (oil cylinder) has very strong rectification ability;
Five, servomotor position detection accuracy height;
Even six system pressure oil sources disappear, locking is constant substantially for a long time in any aperture position (comprising fully open position) also can to keep cylindrical valve;
Seven, system architecture is simple, device is few.Hydraulic control system is exactly several digital quantization cylinders.Concrete quantity is consistent with operation servomotor quantity, and it is to be determined by the cylindrical valve structural design.Can significantly reduce installing space, reduce the time of building site installation and debugging.
Description of drawings:
Fig. 1 is a digital quantization cylinder structure schematic representation;
Fig. 2 is full digital integrated cylindrical valve electrohydraulic synchronous control system structural representation (6 digital quantization cylinder);
Fig. 3 is electrical system architecture frame diagram (6 digital quantization cylinder).
Shown in the accompanying drawing 1, digital quantization cylinder 2, cylinder body 3, piston 4, mechanical feedback mechanism 5, servomotor displacement transducer 6, back coupling device 7, coupling wheel 8, digital valve 9, Pilot operated check valve 10, stepper motor
Embodiment:
The utility model proposes a kind of full digital integrated cylindrical valve digital quantization cylinder.It is characterized in that: described digital quantization cylinder comprises cylinder body (2), piston (3), mechanical feedback mechanism (4), servomotor displacement transducer (5), back coupling mechanism (6), coupling wheel (7), digital valve (8), Pilot operated check valve (9), stepper motor (10).Described digital valve (8) links to each other with stepper motor (10), and described coupling wheel (7) is installed between back coupling mechanism (6) and digital valve (8) spool.Servomotor displacement detecting sensor (5) is installed on the described coupling wheel (7), and described mechanical feedback mechanism (4) connects back coupling mechanism (6) and piston (3).
The rolling screw transmission nut of mechanical feedback mechanism (4) is fixed on the piston (3); The feedback drving sprial bar of described mechanical feedback mechanism (4) is by back coupling mechanism (6), with coupling wheel (7), the coupling of digital valve (8) spool spiral.Mechanical feedback mechanism is for reversing heliconid, and sensor is a multi-turn rotation absolute position encoder.
Full digital integrated cylindrical valve electrohydraulic synchronous control system, critical component are the digital quantization cylinders of forming the hydraulic control system elementary cell.The digital quantization cylinder is the hydraulic actuator of an ACTIVE CONTROL.
The hydraulic control system of full digital integrated cylindrical valve electrohydraulic synchronous control system is exactly by several elementary cells--and-digital quantization cylinder is formed.The quantity of digital quantization cylinder is exactly the quantity of the required servomotor of cylindrical valve.The quantity of the required servomotor of cylindrical valve is to be determined by designing and calculating.
At each servomotor top, a cover precision digital is installed quantizes hydraulic control device.Hydraulic control device and cylindrical valve servomotor integrate, become an organic whole, by with the ingenious built-in high-accuracy mechanical position feedback mechanism that connects of servomotor piston, feed back in real time movement velocity, position to cylindrical valve operation servomotor, form position closed loop, speed-controllable is finished the digitizing motor performance of servomotor automatically.
We are called the conglomerate of hydraulic control device and cylindrical valve servomotor digital fluid cylinder and (are called for short: digital cylinder), should be called the digital quantization cylinder more accurately and (be called for short: digital cylinder).
The digital quantization cylinder is exactly the servomotor that the band precision digital quantizes hydraulic control device, and promptly we quantize the complete precision digital of servomotor.The digital quantization cylinder is a highly integrated hydraulic control component.It is made up of cylinder body (2), piston (3), mechanical feedback mechanism (4), servomotor displacement transducer (5), back coupling mechanism (6), coupling wheel (7), digital valve (8), Pilot operated check valve (9), stepper motor (10) etc.Being integrated in the stepper motor (10) in the digital quantization cylinder, is exactly the interface of electric-hydraulic control system, and it is just like the electric liquid switching mechanism of speed regulator.The digital pulse signal that stepper motor (10) receiving computer sends and rotating, this rotates and drives digital valve (8) valve core movement, by back coupling mechanism (6) spool is rotatablely moved and to change straight line motion into, this straight line motion is opened the valve port of digital valve (8), thereby hydraulic oil is introduced the operation servomotor, and drive operation servomotor piston-advance or retreat by hydraulic oil source.
On the servomotor piston, the mechanical feedback mechanism (4) of reversible transmission is installed, mechanical feedback mechanism (4) is a kind of heliconid that reverses.The rolling screw transmission nut of mechanical feedback mechanism (4) is fixed on the piston (3); The feedback drving sprial bar of mechanical feedback mechanism (4) is by back coupling mechanism (6), with coupling wheel (7), the coupling of digital valve (8) spool spiral.Piston (3) advance or fallback procedures in, drive rotatablely moving of rolling screw transmission nut in the mechanical feedback mechanism (4) be contained in above it by piston (3), be converted into the straight line motion of feedback drving sprial bar.The straight line motion of mechanical feedback mechanism (4) by back coupling mechanism (6), acts on digital valve (8) spool on the one hand, makes spool get back to the preceding original position of action, forms the position reverse feedback; Act on coupling wheel (7) on the other hand, drive servomotor displacement transducer (5) and rotate, the physical location of piston (3) is detected.
When stepper motor (10) received digital pulse control signal that electric control system sends, servomotor piston (3) just moved a fixing stroke (as 0.01mm).The stroke value that this is fixing is called the digital quantization value, and digital quantization value unit is mm.
According to the different requirements of system's control accuracy, digital quantization value K can be designed to 0.01mm, 0.02mm, 0.05mm, 0.1mm, 0.5mm, 1.0mm etc.
The digital quantization value is to be determined by design.By an inner cover mechanical feedback mechanism, the corresponding relation that strict guarantee control impuls and servomotor piston move, digital quantization value.With the mobile complete digital quantization of servomotor piston, make the amount of movement of servomotor piston, only relevant with control impuls quantity.
Between back coupling mechanism (6) and digital valve (8) spool, coupling wheel (7) is housed, on coupling wheel (7) projecting shaft, servomotor displacement detecting sensor (5) is installed, sensor is a multi-turn rotation absolute position encoder, makes it accurately to know the physical location of servomotor piston (3).
In design, guarantee that the servomotor piston moves 10mm, encoder rotation 1 circle.Encoder rotation 1 circle has 8192 measuring points; The resolution that this means displacement measuring device is 10mm ÷ 8192 ≈ 1.22 μ m, and promptly precision can reach 1.5 μ m, and the stroke of 10mm can be divided into 8192 measuring points and detect.
On the control oil channel of digital quantization cylinder, be integrated with Pilot operated check valve (9), it is used for system pressure oil sources disappearance locking, prevents that cylindrical valve from gliding in the enable possition.
There is a projecting shaft end in stepper motor (10).With the projecting shaft of the manual rotating stepper motor of instrument (10), apply control wave just as giving stepper motor (10), equally accurately control figure quantizes the cylinder piston motion.Pure manually-operable when non-transformer is provided.
The digital quantization cylinder is the position closed loop and the speed controlling of complexity originally, has become simple numerical pulse control.Like this, both simplify control system, also simplified system architecture, improved speed of response simultaneously.
Because all elements of hydraulic control device all are contained in servomotor inside, have improved the Security and the reliability of system greatly, have improved the antijamming capability of system greatly.This structure is suitable for bad working environment and extensive maintenance levels especially, has improved the reliability of equipment, can accomplish that basically on-the-spot acyclic homologically trioial is tried and zero dimension is protected long-term stable operation.
The digital quantization cylinder also has characteristics, and the actual error of its piston rod moving displacement in servomotor piston rod moving process, has only a basic error by design, production, assembling decision, does not have cumulative error.
Digital quantization cylinder interface comprises hydraulic interface and electric interfaces.
Hydraulic interface: every digital quantization cylinder has a hydraulic fluid port P to connect pressure oil-source (P among the electric-hydraulic synchronous control system figure, X are same hydraulic fluid port); Hydraulic fluid port oil (T among the electric-hydraulic synchronous control system figure, Y are same hydraulic fluid port) that runs in.Only need the P hydraulic fluid port with the digital quantization cylinder, the T hydraulic fluid port is received respectively on 2 fuel ring pipes (1 pressure oil pipe P, 1 return tube T), and fuel ring pipe is directly connected to the power station oil pressure unit, and the centre no longer includes other hydraulic equipment and device.
Electric interfaces: mainly contain 2 electric interfaces between electric control system and the hydraulic control system, stepper motor, displacement transducer.Stepper motor is with the electrical system control signal, is converted into hydraulic control system actuator; Displacement transducer is with the hydraulic control system implementation status, changes by digital quantization cylinder position of piston, stroke, feeds back to electrical system.Stepper motor, displacement transducer link to each other with cylindrical valve electrical control dish by cable.
The servomotor displacement detecting sensor is a multi-turn rotation absolute position encoder.Between the driving mechanism and digital valve spool that links to each other with the servomotor piston, coupling wheel is housed, encoder is installed on the coupling wheel projecting shaft.Coupling wheel changes the motion of servomotor piston linear into to rotatablely move, and in design, strict guarantee servomotor piston moves 10mm, encoder rotation 1 circle.Like this, just with the servomotor actual displacement, detect concrete physical location by encoder.
The electric control system accompanying drawing is to be example with 6 servomotors, and to many (3 to 12) servomotors, system diagram is identical, just increases and decreases servomotor quantity and gets final product.
Control section is made up of PLC, touch screen, air-break switch, relay, signaling lamp, diverter switch, control knob, wiring base.
Power section is made up of power supply change-over device, 24VDC power supply selection device, ups power, controllor for step-by-step motor, air-break switch, relay, signaling lamp, wiring base.
The core of electric control equipment is PLC, is opened, is closed by its control and operation cylindrical valve, and all demonstrations all realize on touch screen interface.The execute-in-place order both can be operated on touch screen interface, also can operate on the control section panel.
Programmable controller comprises frame, power module, CPU module, switching input module, switching value output module, analog amount load module, analog output module, step motor control module, communication module etc.All inputs, output module except that cylindrical valve electric control equipment oneself control is used, are reserved with switching value input, the output channel of certain surplus, analog amount input, output channel.
Electric control equipment is by 220VDC, the power supply of 220VAC two class power supplys.220VDC power supply, 220VAC power supply are realized the multichannel redundancy.
Under the normal state, first power supply change-over device provides the first via 24VDC power supply by first via 220VAC power supply.When first via 220VAC power supply disappears, automatically switch by the 220VDC power supply, by the second power supply conversion equipment, provide the second road 24VDC power supply (the second road 24VDC power supply is in hot stand-by duty all the time).When first via 220VAC power up, recover automatically again to power by first via 220VAC.If first via 220VAC power supply, 220VDC disappear simultaneously, first via 24VDC power supply, the second road 24VDC power supply also just disappear simultaneously, at this moment, just power by the second road 220VAC power supply fully, through the 3rd power supply change-over device, provide Third Road 24VDC power supply, to guarantee the reliability of cylindrical valve electric control equipment.
The second road 220VAC power supply is connected across on the ups power, and under the normal state, ups power is in floating charge state.The output of ups power offers the 3rd power supply change-over device on the one hand, makes Third Road 24VDC power supply be in hot stand-by duty all the time; Stepper motor power drive template 220VAC is provided power supply on the other hand.Even external like this 220VAC, 220VDC complete obiteration, ups power can guarantee within a certain period of time that also cylindrical valve electrohydraulic synchronous control system can be operated, just improve the reliability of digital quantization cylinder barrel shape valve electrohydraulic synchronous control system greatly.
Third Road 220VAC power supply provides power supplys such as control section intraoral illumination, draught fan, electric heating protection against the tide, two-phase power supply socket, three-phase power socket.
The 24VDC power supply of servomotor displacement transducer is provided by electric control equipment.Signaling interface between displacement transducer and the electric control equipment adopts the digital quantity communication.
Full digital integrated cylindrical valve electrohydraulic synchronous control system is controlled the tubular opening of valves, is closed, and is driven by many digital quantization cylinders.During proper functioning, as long as by the cylindrical valve electric control system, according to the program that weaves, on many digital quantization cylinders stepper motor output same frequency, with the control wave of quantity; Cylindrical valve can be by given operation curve high-precise synchronization lifting; Pulse frequency is represented the servomotor motion speed, and the pulse sum is represented stroke, and is corresponding one by one.
If desired during certain digital quantization cylinder of single movement cylindrical valve, need only give needs independent digital quantization cylinder send out control wave to get final product.This initial stage installation, debugging, correction, rectification for cylindrical valve provides great convenience.
Be integrated in the displacement transducer on the digital quantization cylinder, detect each digital quantization cylinder physical location, stroke in real time, and testing signal delivered to the cylindrical valve electric control system in real time, the cylindrical valve electric control system receives digital quantization cylinder position, stroke signal, and measure, monitor, analyze, handle, and judge many digital quantization cylinder synchronous situation simultaneously.
Though cylindrical valve opens, cuts out, under same frequency, pulse signal control, can keep the elevating movement of many digital quantization cylinder high-precise synchronization with quantity.But in order to increase system reliability, we are still with digital quantization cylinder displacement transducer signal, send into electric control system, the system of doing on the one hand shows, constitutes on the other hand a big closed loop control system, both finished functions such as measurement, supervision, analysis, processing, and made whole system possess dual distribution closed loop control function.
Keeping many digital quantization cylinders of cylindrical valve synchronous, is the important step in the cylindrical valve control.Whether many digital quantization cylinders are synchronous, and we measure, judge by many digital quantization cylinder displacement signals.The physical location of many digital quantization cylinders, stroke are to be finished jointly by displacement transducer, displacement measurement unit.Displacement transducer is integrated in the digital quantization cylinder, and the displacement measurement unit is in the electrical control dish.
Claims (6)
1, a kind of full digital integrated cylindrical valve digital quantization cylinder, it is characterized in that: described hydraulic control system is the digital quantization cylinder, described digital quantization cylinder comprises cylinder body (2), piston (3), mechanical feedback mechanism (4), servomotor displacement transducer (5), back coupling mechanism (6), coupling wheel (7), digital valve (8), Pilot operated check valve (9), stepper motor (10), described digital valve (8) links to each other with stepper motor (10), described coupling wheel (7) is installed between back coupling mechanism (6) and digital valve (8) spool, servomotor displacement detecting sensor (5) is installed on the described coupling wheel (7), and described mechanical feedback mechanism (4) connects back coupling mechanism (6) and piston (3).
2, full digital integrated cylindrical valve digital quantization cylinder according to claim 1 is characterized in that: the rolling screw transmission nut of described mechanical feedback mechanism (4) is fixed on the piston (3);
3, full digital integrated cylindrical valve digital quantization cylinder according to claim 2, it is characterized in that: the feedback drving sprial bar of described mechanical feedback mechanism (4), by back coupling mechanism (6), with coupling wheel (7), the coupling of digital valve (8) spool spiral.
4, full digital integrated cylindrical valve digital quantization cylinder according to claim 3, it is characterized in that: described digital quantization cylinder is meant that hydraulic control device and cylindrical valve servomotor are integrated into an organic whole.
5, full digital integrated cylindrical valve digital quantization cylinder according to claim 4, it is characterized in that: described mechanical feedback mechanism is for reversing heliconid.
6, full digital integrated cylindrical valve digital quantization cylinder according to claim 5 is characterized in that: described sensor is a multi-turn rotation absolute position encoder.
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| CN2009200817869U CN201433848Y (en) | 2009-06-16 | 2009-06-16 | Full-digital integrated cylindrical valve digital quantization tank |
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| CN2009200817869U CN201433848Y (en) | 2009-06-16 | 2009-06-16 | Full-digital integrated cylindrical valve digital quantization tank |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102011681A (en) * | 2010-06-05 | 2011-04-13 | 常州液压成套设备厂有限公司 | Underground workshop servomotor |
| CN102635492A (en) * | 2012-04-25 | 2012-08-15 | 中国水电顾问集团西北勘测设计研究院 | Double-regulating electric combined device and method of Kaplan turbine |
| CN104265545A (en) * | 2014-09-18 | 2015-01-07 | 武汉大学 | Integrated oscillating servomotor of water turbine distributor |
| CN105464881A (en) * | 2015-12-22 | 2016-04-06 | 国家电网公司 | Non-synchronous guide vane servomotor free of cylinder falling |
| CN106704312A (en) * | 2015-11-17 | 2017-05-24 | 北京航空航天大学 | Digital hydraulic cylinder with novel feedback mechanism |
| CN104033432B (en) * | 2014-05-23 | 2017-06-13 | 北京航天发射技术研究所 | Numerical control oil cylinder closed-loop control system and method |
| CN107917117A (en) * | 2016-10-11 | 2018-04-17 | 张利 | A kind of mechanical hydraulic servo cylinder |
| CN108331799A (en) * | 2018-04-12 | 2018-07-27 | 辽宁工程技术大学 | A kind of machine feedback formula single pole symmetrical figure fluid cylinder |
| CN108843479A (en) * | 2018-06-28 | 2018-11-20 | 中国电建集团华东勘测设计研究院有限公司 | Cylindrical valve overcurrent characteristic test method and measuring device |
| CN114607548A (en) * | 2022-03-22 | 2022-06-10 | 中国长江电力股份有限公司 | Hydraulic zero calibration method for digital quantization cylinder type cylindrical valve of hydroelectric generating set |
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- 2009-06-16 CN CN2009200817869U patent/CN201433848Y/en not_active Expired - Lifetime
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102011681A (en) * | 2010-06-05 | 2011-04-13 | 常州液压成套设备厂有限公司 | Underground workshop servomotor |
| CN102635492A (en) * | 2012-04-25 | 2012-08-15 | 中国水电顾问集团西北勘测设计研究院 | Double-regulating electric combined device and method of Kaplan turbine |
| CN102635492B (en) * | 2012-04-25 | 2014-05-07 | 中国水电顾问集团西北勘测设计研究院 | Double-regulating electric combined device and method of Kaplan turbine |
| CN104033432B (en) * | 2014-05-23 | 2017-06-13 | 北京航天发射技术研究所 | Numerical control oil cylinder closed-loop control system and method |
| CN104265545A (en) * | 2014-09-18 | 2015-01-07 | 武汉大学 | Integrated oscillating servomotor of water turbine distributor |
| CN104265545B (en) * | 2014-09-18 | 2016-04-27 | 武汉大学 | Turbine gate mechanism integrated oscillating type servomotor |
| CN106704312A (en) * | 2015-11-17 | 2017-05-24 | 北京航空航天大学 | Digital hydraulic cylinder with novel feedback mechanism |
| CN105464881A (en) * | 2015-12-22 | 2016-04-06 | 国家电网公司 | Non-synchronous guide vane servomotor free of cylinder falling |
| CN107917117A (en) * | 2016-10-11 | 2018-04-17 | 张利 | A kind of mechanical hydraulic servo cylinder |
| CN108331799A (en) * | 2018-04-12 | 2018-07-27 | 辽宁工程技术大学 | A kind of machine feedback formula single pole symmetrical figure fluid cylinder |
| CN108843479A (en) * | 2018-06-28 | 2018-11-20 | 中国电建集团华东勘测设计研究院有限公司 | Cylindrical valve overcurrent characteristic test method and measuring device |
| CN108843479B (en) * | 2018-06-28 | 2024-03-19 | 中国电建集团华东勘测设计研究院有限公司 | Cylindrical valve overcurrent characteristic test method and measurement device |
| CN114607548A (en) * | 2022-03-22 | 2022-06-10 | 中国长江电力股份有限公司 | Hydraulic zero calibration method for digital quantization cylinder type cylindrical valve of hydroelectric generating set |
| CN114607548B (en) * | 2022-03-22 | 2023-06-13 | 中国长江电力股份有限公司 | Hydraulic zero calibration method for digital quantized cylinder type barrel valve of hydroelectric generating set |
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Effective date of registration: 20181126 Address after: 618000 the Yellow River West Road, Deyang, Deyang, Sichuan Co-patentee after: Dongfang Electric Automatic Control Engineering Co., Ltd. Patentee after: Dongfang Electric Group Dongfang Motor Co., Ltd. Address before: 618000 the Yellow River West Road, Deyang, Deyang, Sichuan Co-patentee before: DFEM Control Equipment Co., Ltd. Patentee before: Dongfang Electric Group Dongfang Motor Co., Ltd. |
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Granted publication date: 20100331 |