CN101353970A - Control device of double-driving force rotating barrier actuating mechanism - Google Patents
Control device of double-driving force rotating barrier actuating mechanism Download PDFInfo
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- CN101353970A CN101353970A CNA2008100392426A CN200810039242A CN101353970A CN 101353970 A CN101353970 A CN 101353970A CN A2008100392426 A CNA2008100392426 A CN A2008100392426A CN 200810039242 A CN200810039242 A CN 200810039242A CN 101353970 A CN101353970 A CN 101353970A
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- displacement transducer
- rotating barrier
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Abstract
The invention relates to an actuator control device of a dual-drive power rotary clapboard, which comprises a first moving component, a first hydraulic servomotor, a second moving component, a second hydraulic servomotor, an electrohydraulic servo valve, a first displacement transducer, a second displacement transducer, a first oil pipe and a second oil pipe; wherein, the second displacement transducer is arranged on a connecting rod of the second hydraulic servomotor. The upper part of an oil cylinder of the first hydraulic servomotor 4 is connected with the lower part of an oil cylinder of the second hydraulic servomotor by the first oil pipe. The upper part of the oil cylinder of the second hydraulic servomotor is connected with the lower part of the oil cylinder of the first hydraulic servomotor by the second oil pipe; the electrohydraulic servo valve receives a control instruction sent from a stream turbine control system (DEH) at the external part of the device. The instruction is compared with a route feedback given by the first displacement transducer arranged on the connecting rod of the first hydraulic servomotor and then an operation is carried out to obtain a control signal. The electrohydraulic servo valve inputs oil to the first hydraulic servomotor and the second hydraulic servomotor so as to ensure that the pistons of the two hydraulic servomotors move and the rotary clapboard meets the opening degree required by the control instruction.
Description
Technical field
The present invention relates to a kind of control device of double-driving force rotating barrier actuating mechanism.
Background technique
At present, the rotation of extraction turbine rotating barrier all is by one-sided oil engine control, the aperture of removing to regulate rotating barrier after the command signal that oil engine is accepted control system and the closed loop output of travel feedback, the adjustment extraction pressure.As Fig. 1, single oil engine be controlled to be single closed loop control, steam turbine control system (DEH) 95 provides control command, this instruction (is a summation operation with being arranged on the computing of making comparisons of travel feedback that first displacement transducer 71 on the first oil engine connecting rod 42 provides, since control command be generally on the occasion of, travel feedback is generally reverse feedback, it is actual that what draw is both differences) after provide a current signal to electrohydraulic control 6, this servovalve 6 is according to two the oil transportation mouth 61 of SC sigmal control that receives, 62 aperture, make the first oil engine piston 41 produce motion, the first oil engine piston 41 drives the first motion assembly, 21 motions of the first oil engine connecting rod 42 and rotating barrier.In the first oil engine connecting rod, 42 movement processes, first displacement transducer 71 constantly provides travel feedback, the computing of constantly making comparisons of control command and travel feedback, move to the position that control command requires up to the first oil engine connecting rod 42, be that rotating barrier 1 aperture reaches requirement, this moment, the difference of control command and travel feedback was 0, and two oil transportation mouths of servovalve 61,62 are closed.
To be high pressure oil flow into through valves 9 and filter screen 91 filler opening 63 from servovalve 6 from power oil input end 93 oil circuit of one-sided oil engine, when control command requires the first oil engine piston 41 to move upward, servovalve 6 is connected the filler opening 63 and the first oil transportation mouth 61, high pressure oil flows to the first oil engine piston, 41 bottoms, servovalve 6 is connected the oil outlet 64 and the second oil transportation mouth 62 simultaneously, high pressure oil flows to oil revolving end 92 from the first oil engine piston, 41 tops, this moment, the first oil engine piston 41 moved upward, steam turbine rotary spacing plate 1 rotates to clockwise direction, promptly opens.
But the active force of one-sided oil engine also can produce a positive pressure that acts on the rotating barrier bearing except the required torque of the rotating barrier that rotates.For large-size steam turbine, the rotating barrier bearing diameter is very big, under the effect of positive pressure, except producing big friction torque, also can cause the rotating barrier distortion, makes the rotating barrier bite.
Chinese patent CN10121168 discloses a kind of double-driving force even type rotary partition board exeacting mechanism, comprises two cover rotating barrier actuating mechanisms, and every cover mechanism comprises motion assembly and the oil engine that lever, connecting rod, fulcrum constitute.This actuator is rotated by the common rotary driving dividing plate of two oil engines, and wherein first oil engine is that initiatively second oil engine is driven.This mechanism has avoided one-sided oil engine to act on the positive pressure of rotating barrier bearing, has eliminated friction torque, and problem such as rotating barrier distortion, bite.But this patent only discloses two oil engine rotating barrier actuating mechanisms, does not have open how the motion of two oil engines to be control effectively.
Summary of the invention
The object of the present invention is to provide a kind of control device of double-driving force rotating barrier actuating mechanism, this control gear is realized the effective control to the rotating barrier motion by the motion of two oil engines of control, and the rotation of assurance rotating barrier nimbly and freely.
The present invention is achieved in that a kind of control device of double-driving force rotating barrier actuating mechanism, comprise the first motion assembly, first oil engine, the second motion assembly, second oil engine, electrohydraulic control and first displacement transducer, this device also comprises second displacement transducer, first oil pipe and second oil pipe, second displacement transducer is arranged on the second oil engine connecting rod, the first oil engine oil cylinder top links to each other by first oil pipe with the second oil engine oil cylinder bottom, and the second oil engine oil cylinder top links to each other by second oil pipe with the first oil engine oil cylinder bottom;
Electrohydraulic control is accepted from installing the control command that outside steam turbine control system (DEH) provides, this instruction be arranged on the computing of making comparisons of travel feedback that first displacement transducer on the first oil engine connecting rod provides and draw control signal, electrohydraulic control is to first oil engine and the second oil engine oil transportation, make two oil engine piston motions, rotating barrier reaches the aperture that control command requires.
The described first oil engine oil cylinder inside is provided with spacing fixture block.
The travel feedback signal that described second displacement transducer provides is only done demonstration and is used not as the feedback signal in the closed loop control.
The travel feedback that the travel feedback that described second displacement transducer provides and first displacement transducer provide is averaged earlier, provide the control command computing of making comparisons with steam turbine control system (DEH) again and draw control signal, this control signal input electrohydraulic control, and then make rotating barrier reach the aperture that control signal requires.
Control device of double-driving force rotating barrier actuating mechanism working principle of the present invention is:
The steam turbine control system (DEH) outside from device provides the control command of opening rotating barrier (promptly clockwise rotating), this instructs and is arranged on the travel feedback (physical location of the clear oil engine connecting rod of this feedback form that first displacement transducer on the first oil engine connecting rod provides, the physical location of rotating barrier just) computing of making comparisons draws control signal (specified position of this signal indicating rotating barrier and the gap of physical location).This control signal control electrohydraulic control moves upward the first oil engine piston by power oil, and the second oil engine piston moves downward, and drives the first motion assembly and the second motion assembly, makes rotating barrier to moving clockwise, and promptly opens.Along with the first oil engine connecting rod constantly moves upward, the travel feedback that first displacement transducer provides and the difference of control command are more and more littler, and the aperture of electrohydraulic control is also corresponding to be reduced, up to difference is zero, be that the rotating barrier aperture puts in place, electrohydraulic control is just closed each oil transportation mouth, and action is finished.
Otherwise steam turbine control system (DEH) provides the control command of closing rotating barrier (promptly rotating counterclockwise), and the travel feedback that this instruction provides with first displacement transducer computing of making comparisons draws control signal.This control signal control electrohydraulic control makes rotating barrier to motion counterclockwise, promptly closes.
The first oil engine oil cylinder inside is provided with spacing fixture block, define the range of movement of the first oil engine piston, because second oil engine is from oil engine, the range of movement of the second oil engine piston also obtains limiting indirectly, like this, also corresponding the obtaining of the rotation of rotating barrier limits.Spacing fixture block guarantees that the aperture of rotating barrier is no more than limit position.
For second displacement transducer, two kinds of not same-actions can be arranged, a kind of is only to show, the travel feedback that provides is not as the feedback signal in the closed loop control; Another kind is that the travel feedback that the travel feedback that provides of second displacement transducer and first displacement transducer provide is averaged earlier, provide the control command computing of making comparisons with steam turbine control system (DEH) again and draw control signal, this command control electrohydraulic control, and then make rotating barrier reach the aperture that control command requires.Because first oil engine is initiatively, second oil engine is driven, only from final effect, as long as the motion of control first oil engine can be accomplished requirement, but impossible absolute synchronization in the movement process of principal and subordinate's oil engine in the actual production, if two travel feedback are done on average, can draw accurate relatively rotating barrier aperture situation in real time, can make control procedure more accurate.
The present invention has following beneficial effect: control device of double-driving force rotating barrier actuating mechanism of the present invention adopts rational oil circuit configuration, switching by the control electrohydraulic control, reach effective control to two oil cylinder motions, solve the stationary problem of two oil engines, guaranteed rotating barrier control nimbly and freely.
Description of drawings
The invention will be further described below in conjunction with the drawings and specific embodiments.
Fig. 1 is the one-sided oil engine rotating barrier actuating mechanism of a prior art control gear schematic representation;
Fig. 2 is a control device of double-driving force rotating barrier actuating mechanism schematic representation of the present invention;
Among the figure: 1 rotating barrier, 21 first motion assemblies, 22 second motion assemblies, 31 first oil pipes, 32 second oil pipes, 4 first oil engines, 41 first oil engine pistons, 42 first oil engine connecting rods, 5 second oil engines, 51 second oil engine pistons, 52 second oil engine connecting rods, 6 electrohydraulic controls, 61 first oil transportation mouths, 62 second oil transportation mouths, 63 filler openings, 64 oil outlets, 71 first displacement transducers, 72 second displacement transducers, 73 demodulators, 8 servoamplifiers, 9 valves, 91 filter screens, 92 oil revolving ends, 93 power oil input ends, 95 steam turbine control systems (DEH), 10 spacing fixture blocks.
Embodiment
Referring to Fig. 2, a kind of control device of double-driving force rotating barrier actuating mechanism, comprise the first motion assembly 21, first oil engine 4, the second motion assembly 22, second oil engine 5, the electrohydraulic control 6 and first displacement transducer 71, this device also comprises second displacement transducer 72, first oil pipe 31 and second oil pipe 32, second displacement transducer 72 is arranged on the second oil engine connecting rod 52, first oil engine, 4 oil cylinder tops link to each other by first oil pipe 31 with second oil engine, 5 oil cylinder bottoms, and second oil engine, 5 oil cylinder tops link to each other by second oil pipe 32 with first oil engine, 4 oil cylinder bottoms;
Electrohydraulic control is accepted from installing the control command that outside steam turbine control system (DEH) 95 provides, this instruction be arranged on the computing of making comparisons of travel feedback that first displacement transducer 71 on the first oil engine connecting rod 42 provides and draw control signal, this control signal control electrohydraulic control 6, the control signal that electrohydraulic control 6 bases receive is to first oil engine 4 and 5 oil transportations of second oil engine, make two oil engine piston motions, rotating barrier 1 reaches the aperture that control command requires.First oil engine, 4 oil cylinder inside are provided with spacing fixture block 10, the second oil engines 5 also can be provided with identical spacing fixture block.
During device work, the steam turbine control system (DEH) outside from device provides the control command of opening rotating barrier 1 (promptly clockwise rotating), first displacement transducer 71 that is arranged on simultaneously on the first oil engine connecting rod 42 provides travel feedback, travel feedback through after demodulator 73 demodulation with control command with make comparisons computing, draw control signal, this control signal is amplified back control electrohydraulic control 6 through servoamplifier 8, electrohydraulic control 6 is connected the filler opening 63 and the first oil transportation mouth 61, and the oil outlet 64 and the second oil transportation mouth 62 are connected.This moment, power oil flowed into the first oil engine piston, 41 bottoms through the filler opening 63 and the first oil transportation mouth 61 of valve 9, filter screen 91 electrohydraulic controls 6 successively from power oil input end 93, and power oil flows to the second oil engine piston, 51 tops along second oil pipe 32; Power oil simultaneously flows out from the first oil engine piston, 41 tops, and power oil flows to the first oil engine piston, 41 tops from the second oil engine piston, 51 bottoms along first oil pipe 31, and the power oil that flows out from the first oil engine piston, 41 tops flows to oil revolving end 92 through the second oil transportation mouth 62 and servovalve oil outlet 64.Like this, the first oil engine piston 41 moves upward, and the second oil engine piston 51 moves downward, and drives the first motion assembly 21 and the second motion assembly 22, makes rotating barrier 1 to moving clockwise, and promptly opens.Along with the first oil engine connecting rod 42 constantly moves upward, the travel feedback that first displacement transducer 71 provides and the difference of control command are more and more littler, the aperture of electrohydraulic control 6 is corresponding to be reduced, up to difference is zero, be that rotating barrier 1 aperture puts in place, electrohydraulic control 6 is just closed each oil transportation mouth, and action is finished.
Otherwise steam turbine control system (DEH) provides the control command of closing rotating barrier 1 (promptly rotating counterclockwise), and the travel feedback that this instruction provides with first displacement transducer 71 computing of making comparisons draws control signal.This control signal control electrohydraulic control 6, electrohydraulic control 6 is connected the filler opening 63 and the second oil transportation mouth 62, and the oil outlet 64 and the first oil transportation mouth 61 are connected.This moment, power oil flowed into the first oil engine piston, 41 tops and the second oil engine piston, 51 bottoms; Power oil simultaneously flows out to oil revolving end 92 from the first oil engine piston, 41 bottoms and the second oil engine piston, 51 tops.Like this, the first oil engine piston 41 moves downward, and the second oil engine piston 51 moves upward, and drives the first motion assembly 21 and the second motion assembly 22, makes rotating barrier 1 to motion counterclockwise, promptly closes.Along with the first oil engine connecting rod 42 constantly moves downward, the travel feedback that first displacement transducer 71 provides and the difference of control command are more and more littler, are zero up to difference, and promptly rotating barrier is closed and put in place, and electrohydraulic control 6 is just closed each oil transportation mouth, and action is finished.
Claims (4)
1, a kind of control device of double-driving force rotating barrier actuating mechanism, comprise the first motion assembly, first oil engine, the second motion assembly, second oil engine, electrohydraulic control and first displacement transducer, it is characterized in that, this device also comprises second displacement transducer, first oil pipe and second oil pipe, second displacement transducer is arranged on the second oil engine connecting rod, the first oil engine oil cylinder top links to each other by first oil pipe with the second oil engine oil cylinder bottom, and the second oil engine oil cylinder top links to each other by second oil pipe with the first oil engine oil cylinder bottom;
Electrohydraulic control is accepted from installing the control command that outside steam turbine control system (DEH) provides, this instruction be arranged on the computing of making comparisons of travel feedback that first displacement transducer on the first oil engine connecting rod provides and draw control signal, electrohydraulic control is to first oil engine and the second oil engine oil transportation, make two oil engine piston motions, rotating barrier reaches the aperture that control command requires.
2, driving force rotating barrier actuating mechanism control gear as claimed in claim 1 is characterized in that, the described first oil engine oil cylinder inside is provided with spacing fixture block.
3, driving force rotating barrier actuating mechanism control gear as claimed in claim 1 or 2 is characterized in that, the travel feedback signal that described second displacement transducer provides is only done demonstration and used not as the feedback signal in the closed loop control.
4, driving force rotating barrier actuating mechanism control gear as claimed in claim 1 or 2, it is characterized in that, the travel feedback that the travel feedback that described second displacement transducer provides and first displacement transducer provide is averaged earlier, provide the control command computing of making comparisons with steam turbine control system (DEH) again and draw control signal, this control signal input electrohydraulic control, and then make rotating barrier reach the aperture that control signal requires.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2008100392426A CN101353970B (en) | 2008-06-20 | 2008-06-20 | Control device of double-driving force rotating barrier actuating mechanism |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2008100392426A CN101353970B (en) | 2008-06-20 | 2008-06-20 | Control device of double-driving force rotating barrier actuating mechanism |
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| CN101353970A true CN101353970A (en) | 2009-01-28 |
| CN101353970B CN101353970B (en) | 2012-02-01 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102061949A (en) * | 2009-11-13 | 2011-05-18 | 上海电气电站设备有限公司 | Turbine rotary clapboard and processing technology thereof |
| CN102621906A (en) * | 2012-03-30 | 2012-08-01 | 江苏金茂制链有限公司 | Method for locating control of hydraulic cylinder |
| CN103437833A (en) * | 2013-09-09 | 2013-12-11 | 中国航空动力机械研究所 | Air inlet guide vane adjusting device |
| CN107246418A (en) * | 2017-06-07 | 2017-10-13 | 哈尔滨理工大学 | Gap couples two-tank method cooperative motion device and its mutual interference decoupling compensation control method |
-
2008
- 2008-06-20 CN CN2008100392426A patent/CN101353970B/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102061949A (en) * | 2009-11-13 | 2011-05-18 | 上海电气电站设备有限公司 | Turbine rotary clapboard and processing technology thereof |
| CN102061949B (en) * | 2009-11-13 | 2013-07-10 | 上海电气电站设备有限公司 | Turbine rotary clapboard and processing technology thereof |
| CN102621906A (en) * | 2012-03-30 | 2012-08-01 | 江苏金茂制链有限公司 | Method for locating control of hydraulic cylinder |
| CN102621906B (en) * | 2012-03-30 | 2014-05-07 | 江苏金茂制链有限公司 | Method for locating control of hydraulic cylinder |
| CN103437833A (en) * | 2013-09-09 | 2013-12-11 | 中国航空动力机械研究所 | Air inlet guide vane adjusting device |
| CN103437833B (en) * | 2013-09-09 | 2016-05-25 | 中国航空动力机械研究所 | Air inlet guide vane adjusting device |
| CN107246418A (en) * | 2017-06-07 | 2017-10-13 | 哈尔滨理工大学 | Gap couples two-tank method cooperative motion device and its mutual interference decoupling compensation control method |
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| Publication number | Publication date |
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| CN101353970B (en) | 2012-02-01 |
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