CN1116629C - Full-digital microcomputer-controlled water turbine speed regulator - Google Patents
Full-digital microcomputer-controlled water turbine speed regulator Download PDFInfo
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- CN1116629C CN1116629C CN98113562A CN98113562A CN1116629C CN 1116629 C CN1116629 C CN 1116629C CN 98113562 A CN98113562 A CN 98113562A CN 98113562 A CN98113562 A CN 98113562A CN 1116629 C CN1116629 C CN 1116629C
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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
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Abstract
The present invention provides a full digital microcomputer controlled and hydraulically regulated speed regulator of a hydraulic turbine. The traditional and complex regulating mode which is controlled by analog quantity and is composed of a servo valve(or a proportional valve), a guiding valve, an auxiliary servomotor, a main matching valve, etc. is completely changed by the present invention which adopts a mode that hydraulic impulse width regulation is controlled by a microcomputer. A regulating device of hydraulic impulse width is mainly formed by combining an electromagnetic ball valve and a cartridge valve, wherein the electromagnetic ball valve can be opened and closed by receiving an impulse width signal command of a microcomputer electric controlling device. A full digital electric controlling device controlled by the microcomputer takes a microcomputer CPU as a center, and is formed by connecting arranged corresponding input modules and output modules. The present invention has the characteristics of simple structure, easy debugging and installation, high reliability, good stability, low price, easy product seriation, etc.
Description
Technical field
What the present invention relates to is hydrogovernor, particularly full digital system controlled by computer hydraulic pressure pulse-width regulated hydrogovernor.
Technical background
Over past ten years,, developed the analog and analog digital formula electrohydraulic governor that a batch facility is strong, reliability is higher both at home and abroad along with developing rapidly of microcomputer electronic technology and hydraulic technique.Forms such as electro-hydraulic servo formula, step-servo motor formula are arranged on physical construction; Speed adjusting techniques such as two microcomputer PLC on electronic control part, have been adopted, as the WT--S type of Wuhan hydroelectricity control equipment company, the SJ--721A type of Nanjing Institute of Automation, the novel speed regulators such as WDT--A type of the Changjiang river opertaing device research institute, its reliability has all reached the level of external equivalents.But hydraulic follow-up device part has still been continued to use servo-valve (or proportioning valve), pilot valve, auxiliary receiver, main basic structure of joining the analog quantity control of compositions such as valve.For example, the hydraulic turbine automatic speed governor (95242025) of Chinese patent microcomputerized control is exactly this kind pattern.The governor structure complexity of this pattern, processing request height, adjust the position and link is many, operation adjust difficulty big, adjust precision and be difficult for maintenance, maintenance difficult, system's fuel consumption when static state is big, used element adopts the professional component of particular design mostly, is not easy to standardization, universalization, integrated, seriation.
Summary of the invention
The purpose of this invention is to provide a kind of simple in structure, hydrogovernor of adjusting easy, easy to operate, good stability, fault is few, price is low full digital system controlled by computer hydraulic pressure pulse-width regulated.
Formation block diagram of the present invention is seen Fig. 1, and the hydraulic regulating device schematic diagram is seen Fig. 2, and electric control gear is seen Fig. 3.
The present invention realizes like this.Hydraulic regulating device and the micro-processor controlled electric control gear of full digital that this speed regulator is made up of the high complete standardized Hydraulic Elements of reliabilities such as Solenoid ball valve, inserted valve constitute.Solenoid ball valve 7,8 imports that wherein can accept the pulse width signal switching of electric control gear meet pressure oil P, outlet is connected on the control oil channel of inserted valve 1,2,3,4, the working connection import of inserted valve 2,3 meets pressure oil P, outlet is connected on respectively on chamber, the left and right sides oil circuit of servomotor, the working connection import of inserted valve 1,4 is connected on chamber, the left and right sides oil circuit of servomotor 12, and outlet is connected on the oil return O; The micro-processor controlled electric control gear of full digital is to be the center with microcomputer CPU, its importation by can reader frequently, net frequently and the parallel load module of the TTL logic of guide vane opening signal and the load module that can import switching values such as start, shutdown form; Output be made up of the transistor output module that the CPU pulse width signal can be converted to solenoid valve Push And Release signal and the output module that CPU shows signal conversion TTL logic can be walked abreast.
Control principle of the present invention is: microcomputer is according to data such as switching signal such as the machine frequency of input, the start of netting frequency and guide vane opening signal and input, shutdown, according to distinctive control strategy and operational method, send the pulse width signal instruction of a modulation through comprehensive computing, export to Solenoid ball valve, inserted valve group by becoming pulse current behind the amplifier, change to servomotor by hydraulic pressure, import a pulse liquid volume, servomotor produces corresponding displacement, this displacement is stepping, if it is very little that pulsewidth is set, the step-wise displacement step pitch is just very little, is similar to straight line.Above process is carried out continuously, just can finish the self-regulating process of flow speed control valve.
The present invention has changed the analog regulation pattern of traditional complexity fully, has adopted the pattern of system controlled by computer hydraulic pressure pulse-width regulated.Make its have simple in structure, debugging is installed easily, reliability is high, good stability, cheap, product are easy to characteristics such as seriation.This speed regulator also has broad prospect of application in water power, thermoelectricity, steel-making, speed regulating control field such as peculiar to vessel.
Description of drawings
The present invention is further described with drawings and Examples below.
Fig. 1 is a formation block diagram of the present invention,
Fig. 2 is the hydraulic regulating device schematic diagram of embodiments of the invention,
Fig. 3 is the digital micro-processor controlled electric control gear theory diagram of embodiments of the invention.
Among Fig. 21,2,3,4--inserted valve group, 5--hand-operated direction valve, 6--EmS valve, 7, the 8--Solenoid ball valve, 9--transfer valve, the two-way oil filter of 10--, the unidirectional stroke throttle valve of 11--, 12--servomotor, 13--throttle grverning valve.
Specific embodiment
As can be seen from Figure 2, the course of work of hydraulic regulating device of the present invention is such.
1, prepares operating mode.
After pressure oil P connects, because Solenoid ball valve 7,8 transfer valves 9 do not obtain signal instruction, spool is in initial position, the control oil channel that pressure oil P enters inserted valve 1,2,3,4 by Solenoid ball valve 7,8 transfer valves 9, the working connection of inserted valve 1,2,3,4 is closed, also make the chamber, the left and right sides of servomotor 12 all not have turnover oil, make servomotor 12 be positioned at neutral position.
2, automatic operating condition.The working connection of inserted valve 1,2,3,4 is opened, is closed and move switching time at every turn, be by electric control gear according to power station specific requirement programming, utilize microcomputer to operate that Solenoid ball valve 7,8 finishes.As 7 energisings of microcomputer order Solenoid ball valve, the control oil channel and the oil return O of inserted valve 1,3 are connected, then the left chamber of servomotor 12 is connected by the major loop and the oil return O of inserted valve 1, the right chamber of servomotor 12 is connected by the major loop and the pressure oil P of inserted valve 3, thereby pressure oil P enters the right chamber of servomotor 12, drives servomotor 12 to left dislocation.If 8 energisings of microcomputer order Solenoid ball valve, the course of action of servomotor 12 is with above-mentioned opposite.Solenoid ball valve the 7, the 8th, by pulsewidth work, through the conversion (being equivalent to pass through power amplification) of inserted valve, export a pulse liquid volume and enter servomotor, make servomotor produce displacement.Said process carries out continuously, then can finish the automatic operational process of speed regulator.
3, emergency cutoff operating mode.
When the automatic control flow of water wheels unit sends the force outage signal; 6 actions of microcomputer order solenoid directional control valve; spool is positioned at position, a left side; pressure oil P enters the control oil channel of inserted valve 2,4 by solenoid directional control valve 6; turn-off inserted valve 2,4; control oil channel and oil return O with inserted valve 1,3 connects simultaneously, and the working connection of inserted valve 1,3 and the oil inlet and oil return road of servomotor 12 are connected.Pressure oil P--inserted valve 3--servomotor 12 right chambeies--servomotor 12 left chambeies--retaining valve 11--inserted valve 1---oil return O, servomotor are to left movement (shutdown direction), thus realization emergency stop (this moment, transfer valve 9 should be switched on always).
4, manual operating condition.
When not needing automatic control, promptly adopt manual operating condition, operation hand-operated direction valve 5, pressure oil P enters the left chamber or the right chamber of servomotor 12, makes servomotor 12 to the right or to left dislocation.According to generating unit speed, carefully operate the number of times and the time of hand-operated direction valve 5, generating unit speed is stabilized under the rated speed moves.
As can be seen from Figure 3, the principle of work of the digital micro-processor controlled electric control gear of the present invention is such.
Machine class frequency and mains frequency or frequency are given to produce a deviation signal through high speed counting module, deliver to CPU by the parallel load module of TTL logic and carry out the PID computing, the result of computing carries out comprehensively with the guide vane opening signal again, after calculating two groups of width modulations (PWM) signal through CPU again, carry out power amplification by the transistor output module.One group for opening, and pulse width signal switch high speed electromagnetic ball valve, the inserted valve of another group for closing reaches and open or the purpose of guide vane closing servomotor.The command signal of unit waterwheel dish through input module switch finish the water wheels unit start, shut down, generate electricity by way of merging two or more grid systems, operation such as increasing and decreasing load, emergency stop.The parallel output module of TTL logic is finished the people--machine dialogue, indication, demonstration unit operating condition, operational factor, state status or the like.
Claims (1)
1, a kind of full-digital microcomputer-controlled water turbine speed regulator is made up of hydraulic pressure pulse-width regulated device and the micro-processor controlled electric control gear of full digital, it is characterized in that:
A) hydraulic pressure pulse-width regulated device is to adopt standardized Hydraulic Elements to form, Solenoid ball valve (7, the 8) import that wherein can accept the pulse width signal switching of electric control gear connects pressure (P), outlet is connected on the control oil channel of inserted valve (1,2,3,4), the working connection import of inserted valve (2,3) connects pressure oil (P), outlet is connected on respectively on chamber, the left and right sides oil circuit of servomotor, the working connection import of inserted valve (1,4) is connected on chamber, the left and right sides oil circuit of relay (12), and outlet is connected in the oil return (O);
B) the micro-processor controlled electric control gear of full digital is to be the center with microcomputer (CPU), its importation by can reader frequently, net frequently and the parallel load module of (TTL) logic of guide vane opening signal and the load module that can import switching values such as start, shutdown form; Output be made up of the transistor output module that (CPU) pulse width signal can be converted to solenoid valve Push And Release signal and the output module that (CPU) shows signal conversion (TTL) logic can be walked abreast.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN98113562A CN1116629C (en) | 1998-05-18 | 1998-05-18 | Full-digital microcomputer-controlled water turbine speed regulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN98113562A CN1116629C (en) | 1998-05-18 | 1998-05-18 | Full-digital microcomputer-controlled water turbine speed regulator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1199139A CN1199139A (en) | 1998-11-18 |
| CN1116629C true CN1116629C (en) | 2003-07-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN98113562A Expired - Fee Related CN1116629C (en) | 1998-05-18 | 1998-05-18 | Full-digital microcomputer-controlled water turbine speed regulator |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0212567A2 (en) * | 1984-03-01 | 1987-03-04 | Bodenseewerk Perkin-Elmer Gmbh | Device for regulating the fuel and oxidant gas supply for a burner of an atomic absorption spectrometer |
| CN1048912A (en) * | 1990-07-25 | 1991-01-30 | 张金铭 | Fluid speed changing |
| CN2252246Y (en) * | 1995-11-14 | 1997-04-16 | 武汉长江控制设备研究所 | Electrohydraulic ration follow-up device for water turbine governor |
| CN2258635Y (en) * | 1996-05-17 | 1997-07-30 | 王素华 | Computer controller for hydraulic turbine speed regulator |
-
1998
- 1998-05-18 CN CN98113562A patent/CN1116629C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0212567A2 (en) * | 1984-03-01 | 1987-03-04 | Bodenseewerk Perkin-Elmer Gmbh | Device for regulating the fuel and oxidant gas supply for a burner of an atomic absorption spectrometer |
| CN1048912A (en) * | 1990-07-25 | 1991-01-30 | 张金铭 | Fluid speed changing |
| CN2252246Y (en) * | 1995-11-14 | 1997-04-16 | 武汉长江控制设备研究所 | Electrohydraulic ration follow-up device for water turbine governor |
| CN2258635Y (en) * | 1996-05-17 | 1997-07-30 | 王素华 | Computer controller for hydraulic turbine speed regulator |
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| Publication number | Publication date |
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| CN1199139A (en) | 1998-11-18 |
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