Communication servo control but the development of governor of process designing hydraulic turbine and application

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The article introduced communication servo control but governor of process designing hydraulic turbine is electric part, electric - the structure of mechanical changeover component and hydraulic pressure system and working principle, labor the design characteristic of departmental cent and function. Communication servo control but the main function index of governor of process designing hydraulic turbine is achieved or excel state level is worth, the moving circumstance in factory of water and electricity also makes clear, this governor performance is good. Hydraulic turbine governor is the main component of hydroelectric station, basically use at controlling water turbogenerator group rotate speed and exert oneself, its character and function affect the on the safe side of electric energy character and hydroelectric station to move directly. Electric - the core component that mechanical changeover component is governor, accordingly, in solving hydraulic turbine governor electric - dependability of work of mechanical changeover assembly is poor, fight smeary ability to wait for a problem infirmly, it is the key that raises dependability of hydraulic turbine governor. The blemish that 1 pace of  enters electric machinery or governor of hydraulic turbine of pilot of dc servo electric machinery exists 20 centuries 90 time are prime, orgnaization of domestic institution of higher learing, scientific research and manufactory home developed electric machinery early or late (the pace enters electric machinery, dc servo electric machinery) model electric - mechanical changeover component. The pace is controlled by instruction pulse into the roll of electric machinery, control is simple; Control of dc servo electric machinery is convenient, timing range is wide, output torsion is tall, overload capability is strong, trends has been answered. Accordingly, enter electric machinery with the pace or governor of hydraulic turbine of pilot of dc servo electric machinery obtained remarkable positive result in the application of big, medium-sized hydroelectric station, solved thereby electro-hydraulic it is weak, easy that servo a powerful person fights smeary ability dependability of hairpin, job is poorer wait for a problem. But, the pace presents electric machinery and limitation of existence of itself of dc servo electric machinery, main show is in: The pace has one to start frequency into electric machinery, cause speed is answered to cannot pass below case of big negative charge fast, and when high speed runs torsion drops, the likelihood when encountering calorie of block locked-rotor, lose a condition; Grind and produce the problem of unripe scintilla of brush of existence of dc servo electric machinery and commutator, of brush wear away can bring trouble, make its are in at the same time safeguard a respect relatively troublesome. Control of 2 communication servo but the structure of governor of process designing hydraulic turbine and main characteristic in recent years, as the progress of electronic technology, parts of an apparatus of new-style power switch, special integrated circuit and control develop algorithmicly, make communicate the drive power source, function that communicates servo to rise greatly, it divides the inadequacy that overcame a pace to enter electric machinery or itself of dc servo electric machinery, still have a function means of powerful, control agile, specifications is good with dependability advanced characteristic. Accordingly, what regard hydraulic turbine governor as the actuating device that makes by communication servo electric machinery is electric - the inevitable result that mechanical changeover component is power electron technology, microelectronics technology, computer technology and control principle progress and ceaseless and forward progress. 2.

Control of servo of 1 structure communication but the electric part of governor of process designing hydraulic turbine is with can making up Cheng controller (PLC) for hardware core, software is used completely modular structure, screen of chromatic liquid crystal shows, have interface of good man-machine of complete Chinese graph; Electric - mechanical changeover component uses communication servo electric machinery, match with ball helix automatic answer buy of traditional Chinese clothes; Hydraulic pressure system is the straight structure that connect form, control in order to communicate the mechanical displacement of servo actuating device directly advocate distributing valve. PLC measures the frequency signal deviation of water turbogenerator group, press certain adjustment the rule (PID or PI) changeover becomes name of telecommunication of positional pilot number; Electric - mechanical changeover component this number signal displacement measures linear translate into machine, again direct control is mixed by auxiliary servomotor advocate the enlarge of 2 class hydraulic pressure that distributing valve comprises, through advocate servomotor control hydraulic turbine guides water Xiekai is spent (or oar leaf corner) , realize the timing of water turbogenerator group and bear control. Communication servo control but the systematic principle structure of governor of process designing hydraulic turbine sees a picture 1, the structure of system of mechanical hydraulic pressure sees a picture 2. Graph control of 1 communication servo but the block diagram of systematic principle structure of governor of process designing hydraulic turbine pursues control of 2 communication servo but the structure of system of hydraulic pressure of machinery of governor of process designing hydraulic turbine 2.

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1 without oil electric - mechanical changeover component 2.

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Actuating device of 1 communication servo communicates servo actuating device to be comprised by communication servo electric machinery and the driver with its form a complete set. In development, type selecting and application, the electric machinery of MSMA communication servo that chose production of the company below Japanese pine and MSDA communicate servo driver. The main characteristic of electric machinery of MSMA communication servo is inertia small, torsion is big, control precision is tall, can achieve the variable rate that becomes direct ratio with frequency conveniently, crawl is not had when low speed moves, without shake, timing range is wide, pitching moment - frequency character is good, the position that high resolution contains oneself on axis of this electric machinery at the same time rotates coder, can give drive the actual corner feedback of electric machinery axis conveniently, position of a closed circuit is formed to control below positional annulus means. Structure of electric machinery of MSMA communication servo is simple, volume is minor, move reliable, need not safeguard. With its the MSDA of form a complete set communicates servo driver is a function the agile, total number word that suits a variety of utility changes way of powerful, control actuating device, itself contains CPU and man-machine interaction interface, can control fashion to its (positional control, speed control, torsion controls fashion or combination controls fashion) , working parameter (if annulus of gain of annulus of positional annulus gain, speed, speed is integral the make a present of before time constant, speed) have set, in order to obtain best control, contented and different operating mode issues the stability of timing system to ask. 2.

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2 automatic answer buy of traditional Chinese clothes is automatic answer buy of traditional Chinese clothes basically is mixed by nut of lever of silk of big lead ball, ball the composition such as positioner. Communication servo electric machinery passes shaft coupling and small handwheel (the hand moves an operation to use) lever of silk of direct link ball, drive ball silk lever to turning when electric machinery (or invert) when, the displacement output rod that becomes an organic whole repeatedly with ball nut rises (or drop) , change electric number signal directly thereby output for mechanical displacement. Because used helix of big lead ball deputy, so fast it is good to use a sex, grind resistance is little, transmission efficiency is tall, dead band is small, life is long. In the meantime, two side set the horizontal semmetry position that outputs lever in ball nut and displacement each a positioner, when communication servo electric machinery breaks phone, below the action of positioner, ball nut and displacement output lever reply instantly primitive horizontal null, ball silk lever also is returned primitive in. Accordingly, adjusting in the process, should hand in, direct current source appears at the same time when breakdown, because communicate servo device setting to have automatic answer in function, can make advocate distributing valve is seasonable answer in, make governor keeps stable, ensure aircrew safety moves.  2.

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2 mechanical hydraulic pressure are followed move systematic machinery hydraulic pressure to follow use a system by contain automatic answer of buy of traditional Chinese clothes electric - mechanical changeover component, pilot distributing valve, auxiliary servomotor and advocate distributing valve piece, oil path module, urgent stop Electromechanical magnetism a powerful person to wait for composition. The structural characteristic of this system is: Use oil path module, cancel the bright canal of join vitta road; Use electric feedback, cancel mechanical feedback lever reach wire rope, transmission lever is not had inside machine ark, avoid to generate dead travel in place of join with a hinge; Implementation uses hand, automatic switch without faze, the structure is compact, the shell is beautiful, the operation is simple, safeguard convenient. 2.

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3 people - machine interface uses chromatic liquid crystal to feel screen to show frequency of current operating conditions, aircrew, guide vane opens unit in real time degree, all sorts of moving parameter such as value of aircrew power, head and breakdown information and operating mode, have a person through touching screen directly - machine dialog, allow to revise moving parameter in real time through menu, show intuitionistic, the operation is convenient, have interface of good man-machine of complete Chinese graph. Control of 3 communication servo but governor of process designing hydraulic turbine saves the county that find black to fight hydroelectric station of the type after power plant of Yan Shui power is dam in the applied Jiangxi of hydroelectric station, installation has 3 12.

5The group of water turbogenerator of mixed flow type of MW, governor is SKDT-80 imitate electro-hydraulic governor, electro-hydraulic servo component is used electro-hydraulic converter. Those who get limited company of the waterpower that fight comfort entrust, carry on by limited company of engineering of Electromechanical of Guangdong river sea the technical reformation task of this governor. In technical reformation, use communication servo to be able to make up programmed control to make a technology undertake technical reformation to this governor, transform at was being finished in June 2001, devoted move. Through a year many move actually, governor case is good. , stop machine a few, the stabilization period that switchs on the mobile phone to record movement for nothing from aircrew is brief, and the net is fast, aircrew idling time decreases, managing with water; Adjust acute, move reliable. The governor model after transforming is GKT80-SP, the spot appraisal test that passed power industry expert in August 2002 at was being mixed in January 2002 respectively and the appraisal that Guangdong visits set of expert of irrigation works hall. The result of main appraisal test after will be being transformed (see a picture 3, graph 4 with the watch 1) with GB/T9652.

1, the data of 1997 undertakes comparative, its are main function index is achieved entirely or excel state level provides a value. Of result of test of the 1 GKT80-SP of experiment curve watch when the experiment graph 4 GKT80-SP when graph 3 GKT80-SP governor throws 25% negative charge governor throws 100% negative charge governor and national par value compare 4 last word  control of   communication servo can process designing governor passed true opportunity of hydroelectric station spot, its adjust acute, reliability is high, performance is good, moving stability, and this product technology is advanced, the construction is simple, reasonable, the operation is simple, safeguard convenient, can bring better economic benefits for hydroelectric station. CNC Milling