CN101276208A - Hydraulic system servo control apparatus - Google Patents
Hydraulic system servo control apparatus Download PDFInfo
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- CN101276208A CN101276208A CNA2008100476031A CN200810047603A CN101276208A CN 101276208 A CN101276208 A CN 101276208A CN A2008100476031 A CNA2008100476031 A CN A2008100476031A CN 200810047603 A CN200810047603 A CN 200810047603A CN 101276208 A CN101276208 A CN 101276208A
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Abstract
The present invention provides a hydraulic system servocontrol device processing data exchange with the computer control system, composed of a first given function block, a second given function block, a third given function block, a regulating function block, a first multiplication function block, a limiting capacity black, a second multiplication function block and an addition function, being mutually connected and processing information exchange by a computer software; when the output signal of the output module of the computer control system is -10-+10mA/DC, the second given function block and the third given function block, the second multiplication function block and the addition function block do not work; when the output signal of the output module is 4-20mA/DC, all functions work. The hydraulic system servocontrol device of the invention makes each set TRT saving 0.06-0.5 million RMB, improving the control precision and stability of the TRT set at the same time, reducing the cost of operation and maintenance.
Description
Technical field
The invention belongs to hydraulic system servo control technique field, relate in particular to blast-furnace top gas recovery energy recovery turbine power generation project and other large hydraulic servocontrol engineering.
Background technology
Blast-furnace top gas recovery energy recovery turbine power generation (being called for short TRT) is the energy-conserving and environment-protective project (referring to accompanying drawing 4) that steel industry does one's utmost to promote.Over nearly 20 years, China introduce and homemade TRT genset above 300, and will have that more multicomputer is yet to be built.TRT is the pressure differential of utilizing between blast furnace furnace roof and the gas main, and blast furnace gas is imported turbine expansion acting through variable stator vane angle, drives generator for electricity generation, thereby will can be reclaimed by the pressure reduction with noise and the consumption of heat energy form on the reduction valve group.General TRT engineering has the identical Hydraulic Servo Control loop of 3～4 covers, also claims the servo-valve station, and some project bypass quick-opening valve only is 1 cover.Above-mentioned Hydraulic Servo Control loop is as follows:
Inlet butterfly valve control: be used for the cutoff high blast furnace gas and advance the coal gas turbine engine, but, cooperate turbine variable stator vane angle control rotating speed simultaneously by any aperture of quick control.
Variable stator vane angle control: turbine generators rotating speed control when being used for Qi Jizhi and being incorporated into the power networks; Changeing blast furnace top pressure when carrying out power per liter control and TRT ordinary production after being incorporated into the power networks regulates automatically.Blast furnace top pressure is a most important technological parameter during whole ironmaking is produced.
Bypass quick-opening valve 1 control: be used for the safety protection control of coal gas turbine engine, when the TRT emergency stop, have automatic adjusting blast furnace top pressure function simultaneously.
Bypass quick-opening valve 2 controls: be used for the safety protection control of coal gas turbine engine, when the TRT emergency stop, have automatic adjusting blast furnace top pressure function simultaneously.
Above quadruplet Hydraulic Servo Control loop is the core of TRT system.Be the deficiency (seeing Fig. 2 and Fig. 3) that example illustrates original servo controller now with the turbine variable stator vane angle.Servo controller is and computer control system instrumentation (built and all adopt this independent servo controller in 300 TRT projects of building in China) independently, its receive from the output signal of computer control system isolate, comparison, computing and amplification, export the servo-valve station again to, control variable stator vane angle automatically and move by technological requirement.Adopt servo controller to compare following shortcoming with the present invention:
(1) precision of servo controller and stability are not as computer control system, particularly low and middle-grade servo controllers.
(2) signal need be isolated.Because servo controller is the equipment of power supply of need working independently, input signal must be isolated (low-grade servo controller does not have first isolator and second insulator functionality, needs the independent isolator of other design alternative) through first isolator and second isolator.
(3) servo controller is equipped with specific requirement to the installation position, need occupy panel board or calculate the rack certain position.
(4) servo controller, isolator adopt lead to be connected with computer control system, and having increased fault may.
(5) increased investment.The price of low-grade servo controller is more than 10,000 yuan; The price of medium-to-high grade servo controller is at 5～120,000 yuan.Therefore, the servo controller price of a cover TRT is at 6～500,000 yuans.
(6) construction working amount and operation expense have been increased.
Because it is complicated that TRT control requires, the TRT project must supportingly go up computer control system.And be to utilize existing computer equipment by the hydraulic system servo control apparatus that software programming realizes, therefore do not increase any project investment and correlative charges.
Summary of the invention
Technical matters to be solved by this invention is: provide a kind of software function to replace traditional hydraulic system servo control apparatus, so that improve the control accuracy and the stability of TRT unit, reduce operation expense.
The technical solution adopted for the present invention to solve the technical problems is: be made up of the first given functional block, the second given functional block, the 3rd given functional block, regulatory function piece, the first multiplication function piece, amplitude limit functional block, the second multiplication function piece and addition function piece, above-mentioned each functional module interconnects by computer software and carries out message exchange.When the output signal of the output module of computer control system be-10～+ during 10mA/DC, the second given functional block and the 3rd given functional block, the second multiplication function piece and addition function piece are inoperative; When the output signal of output module was 4～20mA/DC, all functions piece all worked.
The present invention compared with prior art, the advantage that has mainly is: general TRT genset has the identical Hydraulic Servo Control loop of 3～4 covers, in blast-furnace top gas recovery energy recovery turbine power generation project and other large hydraulic servocontrol engineering, tradition control needs to buy 3～4 cover Hydraulic Servo Control devices, buying expenses 5～400,000 yuan increase user's maintenance task and expense simultaneously.If adopt hydraulic system servo control apparatus of the present invention can make every cover TRT genset save 6～500,000 yuans.Improve the control accuracy and the stability of TRT genset simultaneously, reduced operation expense.
Description of drawings
Fig. 1 is the hydraulic system servo control apparatus schematic diagram.
Fig. 2 is hydraulic system servo controller (medium-to-high grade) schematic diagram.
Fig. 3 is hydraulic system servo controller (low grade) schematic diagram.
Fig. 4 is the schematic diagram that hydraulic system servo control apparatus is controlled blast-furnace top gas recovery energy recovery turbine power generation.
Embodiment
The invention will be further described below in conjunction with embodiment and accompanying drawing, but do not limit the present invention.
The present invention is the hydraulic system servo control apparatus that a kind of and computer control system are carried out exchanges data, its structure is as shown in Figure 1: be made up of the first given functional block, the second given functional block, the 3rd given functional block, regulatory function piece, the first multiplication function piece, amplitude limit functional block, the second multiplication function piece and addition function piece, each functional block realizes by programming and is flexible coupling in computing machine, carries out exchanges data with standard or signal specific (the different manufacturers computer control system is relevant with adopting).Signal system difference according to the output module of computer control system, more than the effect of each functional block different, as: when the output signal of output module be-10～+ during 10mA/DC, the second given functional block and the 3rd given functional block, the second multiplication function piece and addition function piece are inoperative; When the output signal of output module was 4～20mA/DC, all functions piece all worked.
In the computer control system, the regulatory function piece and the addition function piece of the controller and first load module, second load module and output module and Servocontrol device interconnect by software in computing machine, transmit with standard signal.First load module, second load module and output module are connected by cable with field measurement apparatus, position transmitter and servo-valve station.
The described first given functional block and the second given functional block all are used for parameter setting, and setting range is-10～10mA/DC (as-9 ,-8 ,-2 ,-1,0.5,1,2,3,4,5 etc.), are used for signal and amplify or dwindle.
The structure of the first given functional block is: by field instrument acquired signal access controller.
The structure of the second given functional block is: by computer control system process PID computing access controller.
The described the 3rd given functional block is used for parameter setting, setting value is the constant relevant with output module (as get 0.5,1,2,3,4,5 etc.), and relevant with Computer signal system and word length, be used for signals migrate (as being-50～50% etc.) by 0～100% migration.
Described regulatory function piece carries out comparison, amplification and the processing of routine to the signal of the computer control function piece and second load module, and carries out PID (ratio, integration, differential) calculation function.
The described first multiplication function piece carries out conventional multiplying to the signal that comes the self-regulating function piece and the first given functional block, is the canonical algorithm in the Computing functional block storehouse.The power of first multiplication function piece decision Servocontrol device effect.Described amplitude limit functional block is used for the result of the first multiplication function piece is carried out the amplitude restriction.Range value depends on the computer control system of different manufacturers, as the control system of Siemens Company, the amplitude limit functional block with+27648 and+/-27648 dual modes limit.
The described second multiplication function piece carries out conventional multiplying to the signal from the amplitude limit functional block and the second given functional block, is the canonical algorithm in the Computing functional block storehouse.Be used for the input reference signal at different size servo-valve station is adjusted.
Described addition function piece carries out conventional additive operation to the signal from the second multiplication function piece and the 3rd given functional block, is the canonical algorithm in the Computing functional block storehouse.The operation result of addition function piece is controlled the action of corresponding servo-valve station by output module.
Above-mentioned hydraulic system servo control apparatus provided by the invention, (comprise field bus control system FCS with the shared cover computer control system of each functional module, scattered control system DCS and Programmable Logic Controller PLC etc.), can realize multiple signal system (with computer control system first load module, second load module and output module correspondence, as 4～20mA/DC, 0～10mA/DC,-10～10mA/DC 0～20mA/DC,-20～20mA/DC, 1～5V/DC, 0～10V/DC,-10～10V/DC,-1～1V/DC etc.) comparison, computing and amplification, and in conjunction with output module, the multiple signal system control signal that output is satisfied technological requirement and mated with the servo-valve station, as 4～20mA/DC, 0～10mA/DC ,-10～10mA/DC, 0～20mA/DC,-20～20mA/DC, 1～5V/DC, 0～10V/DC ,-10～10V/DC etc., these signals are used to control the action of servo-valve station, thereby fast, accurately drive the controlled device motion.
Hydraulic system servo control apparatus provided by the invention can be used for blast-furnace top gas recovery energy recovery turbine power generation is controlled, its control principle as shown in Figure 4:
Hydraulic system servo control apparatus provided by the invention is a kind of device that can carry out exchanges data with computer control system, and this device is divided into medium-to-high grade and low grade products according to actual needs.
Hydraulic system servo control apparatus principle of work provided by the invention is: the detection signal of measurement mechanism (can be temperature, various technological parameters such as flow, pressure and position) carry out signals collecting by load module and handle after deliver to the control function piece of computer control system, warp and setting value comparison and computing output signal to the regulatory function piece.The regulatory function piece, send the input signal of functional block (carrying out signals collecting and processing) to compare computing in conjunction with another road from the position change and (comprise ratio, integration, differential control through load module, be PID control), the result send the first multiplication function piece and carries out multiplication with the first given functional block, and operation result exports the amplitude limit functional block to.The output of the second given functional block and amplitude limit functional block is after the second multiplication function piece computing, add computing through addition function piece and the 3rd given functional block again, carry out conversion of signals and processing through output module then, output control signals to on-the-spot servo-valve station (servo-valve station can be servo or proportioning valve etc.), realize the automatic control of technological process (temperature, pressure, flow or position).
Below the controller relevant with hydraulic system servo control apparatus of the present invention (control function piece), measurement mechanism, position transmitter, servo-valve station and first load module, second load module and output module are described.
Described control function piece, the computer standard functional block is PID or other regulative mode, it accepts the measuring-signal of first load module and the setting signal of computing machine is regulated.
Described measurement mechanism, measurement and dispensing device for multiple signal such as temperature, pressure, flow or position generally are installed in industry spot.
Described position transmitter is the measurement and the dispensing device of displacement of the lines or angular displacement, and general and controlled device such as valve are supporting and be installed in industry spot.
Described servo-valve station comprises electro-hydraulic proportional valve and electrohydraulic servo valve etc., is the reception and the actuating unit of servo-control signal, its by-pass valve control aperture or displacement size, and general and controlled device such as valve are supporting and be installed in industry spot.
Described first load module receives the multiple signal system from measurement mechanism, as 4～20mA/DC, 0～10mA/DC ,-10～10mA/DC 0～20mA/DC ,-20～20mA/DC, 1～5V/DC, 1～10V/DC, 0～10V/DC,-10～10V/DC,-1～1V/DC ,-250～250mV/DC, thermal resistance, thermopairs etc. are gathered, are transformed and demarcate various signals.First load module belongs to the part of computer control system, generally is installed in the pulpit with computing machine.
Described second load module, reception is from the multiple signal system of position transmitter, as 4～20mA/DC, 0～10mA/DC ,-10～10mA/DC 0～20mA/DC,-20～20mA/DC, 1～5V/DC, 0～10V/DC ,-10～10V/DC,-1～1V/DC etc. gather, transform and demarcate various signals.Second load module belongs to the part of computer control system, generally is installed in the pulpit with computing machine.
Described output module receives the digital signal from Servocontrol device, and signal is transformed and demarcates, output as 4～20mA/DC, 0～10mA/DC ,-10～10mA/DC, 0～20mA/DC,-20～20mA/DC, 1～5V/DC, 0～10V/DC ,-10～10V/DC, output module belongs to the part of computer control system, generally is installed in the pulpit with computing machine.
Claims (9)
1. an energy and computer control system are carried out the Servocontrol device that is applicable to hydraulic system of exchanges data, be made up of the first given functional block, the second given functional block, the 3rd given functional block, regulatory function piece, the first multiplication function piece, amplitude limit functional block, the second multiplication function piece and addition function piece, above-mentioned each functional module interconnects by computer software and carries out message exchange; When the output signal of the output module of computer control system be-10～+ during 10mA/DC, the second given functional block and the 3rd given functional block, the second multiplication function piece and addition function piece are all inoperative; Have only when the output signal of output module is 4～20mA/DC, all functions piece all works, in order to the servo loop of controlled hydraulic system.
2. Servocontrol device according to claim 1 is characterized in that the first given functional block and the second given functional block, and it is used for, and signal amplifies or the parameter area that dwindles is-10～10mA/DC.
3. Servocontrol device according to claim 1 is characterized in that the 3rd given functional block, and it is used for the setting of the parameter of signals migrate, parameter by the relevant constant of output module and with Computer signal system and word length decision.
4. Servocontrol device according to claim 1 is characterized in that the regulatory function piece, the functional block of computer control system and the signal of second load module is carried out conventional comparison, amplification and processing, and carry out the PID computing.
5. according to claim 1 or 2 or 4 described Servocontrol devices, it is characterized in that the first multiplication function piece, the signal that comes the self-regulating function piece and the first given functional block is carried out conventional multiplying, and the power of decision hydraulic system servo control apparatus effect.
6. Servocontrol device according to claim 1 is characterized in that the amplitude limit functional block, is used for the result of the first multiplication function piece is carried out the amplitude restriction.
7. Servocontrol device according to claim 1, it is characterized in that the second multiplication function piece, signal from the amplitude limit functional block and the second given functional block is carried out conventional multiplying, to adjust the input reference signal at the different size servo-valve station in the computer control system.
8. according to claim 1 or 7 described Servocontrol devices, it is characterized in that the addition function piece, the signal from the second multiplication function piece and the 3rd given functional block is carried out conventional additive operation, its operation result is controlled the action of corresponding servo-valve station by output module.
9. Servocontrol device according to claim 1, it is characterized in that being used for comparison, computing and amplification to the multiple signal system corresponding with computer control system first load module, second load module and output module, and in conjunction with output module, the multiple signal system control signal that output is satisfied technological requirement and mated with the servo-valve station, with the action of the servo-valve station in the control computer control system, realize the automatic control of technological process.
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| CN2008100476031A CN101276208B (en) | 2008-05-06 | 2008-05-06 | Hydraulic system servo control apparatus |
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| CN2008100476031A CN101276208B (en) | 2008-05-06 | 2008-05-06 | Hydraulic system servo control apparatus |
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| CN101276208B CN101276208B (en) | 2010-12-08 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102156446A (en) * | 2010-12-01 | 2011-08-17 | 中冶南方工程技术有限公司 | Electro-hydraulic servo control system |
| CN102591383A (en) * | 2012-01-10 | 2012-07-18 | 江苏科技大学 | Electro-hydraulic linear displacement digital servo system and control method thereof |
| CN105278559A (en) * | 2015-11-19 | 2016-01-27 | 西安建筑科技大学 | Variable speed hydraulic power supply compound compensation control system and method |
| US10670055B2 (en) | 2013-06-04 | 2020-06-02 | Danfoss Power Solutions Aps | Hydraulic system and a method for operating a hydraulic system |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1032554C (en) * | 1994-08-01 | 1996-08-14 | 北京科技大学 | Precise and inertial hydraulic servo controlling system and method |
| CN1325891C (en) * | 2003-07-21 | 2007-07-11 | 陕西帅克传感仪器制造有限公司 | Full-automatic accurate pressure testing control instrument |
| CN2690928Y (en) * | 2004-03-30 | 2005-04-06 | 中国人民解放军63983部队 | Hydraulic servo synchronous controller |
| CN2717569Y (en) * | 2004-08-09 | 2005-08-17 | 天津市天锻压力机有限公司 | Intelligent semisolid die forging hydraulic press complete equipment control system |
| CN1916787A (en) * | 2005-08-16 | 2007-02-21 | 比亚迪股份有限公司 | Electrohydraulic servo control system and method inuse for simulating motorway |
| CN1955870A (en) * | 2005-10-28 | 2007-05-02 | 上海欧达电气成套设备工程有限公司 | Device for controlling constant-pressure system at hydraulic pressure of planisher |
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2008
- 2008-05-06 CN CN2008100476031A patent/CN101276208B/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102156446A (en) * | 2010-12-01 | 2011-08-17 | 中冶南方工程技术有限公司 | Electro-hydraulic servo control system |
| CN102591383A (en) * | 2012-01-10 | 2012-07-18 | 江苏科技大学 | Electro-hydraulic linear displacement digital servo system and control method thereof |
| US10670055B2 (en) | 2013-06-04 | 2020-06-02 | Danfoss Power Solutions Aps | Hydraulic system and a method for operating a hydraulic system |
| CN105278559A (en) * | 2015-11-19 | 2016-01-27 | 西安建筑科技大学 | Variable speed hydraulic power supply compound compensation control system and method |
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| CN101276208B (en) | 2010-12-08 |
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