CN201228693Y - Adaptation type hydraulic system of closed-loop control load for computer - Google Patents

Adaptation type hydraulic system of closed-loop control load for computer Download PDF

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Publication number
CN201228693Y
CN201228693Y CNU2008200880711U CN200820088071U CN201228693Y CN 201228693 Y CN201228693 Y CN 201228693Y CN U2008200880711 U CNU2008200880711 U CN U2008200880711U CN 200820088071 U CN200820088071 U CN 200820088071U CN 201228693 Y CN201228693 Y CN 201228693Y
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China
Prior art keywords
hydraulic system
circuit
conversion circuit
oil pump
digital
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Expired - Fee Related
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CNU2008200880711U
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Chinese (zh)
Inventor
王长陶
钟绵新
李建华
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Zhejiang University ZJU
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Zhejiang University ZJU
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Priority to CNU2008200880711U priority Critical patent/CN201228693Y/en
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Abstract

The utility model relates to a computer closed-loop control load adaptability type hydraulic system, which comprises an oil pump generator system, wherein the oil pump generator system is connected with a servo oil cylinder via a servo valve, the hydraulic system is further equipped with a closed-loop control circuit, the closed-loop control circuit is composed of a pressure sensor, a signal amplification circuit, an analog-to-digital conversion circuit, an industrial computer, a digital-to-analog conversion circuit and a proportional relief valve, wherein an input end of the pressure sensor is connected with the servo oil cylinder, an output end of the pressure sensor is connected with an input end of the digital-to-analog conversion circuit via the signal amplification circuit, an output end of the digital-to-analog conversion circuit and an input end of the digital-to- analog conversion circuit are respectively connected with the industrial computer, an output end of the digital-to-analog conversion circuit is respectively connected with the proportional relief valve and the servo valve, and the proportional relief valve is connected with the oil pump generator system. The utility model realizes the computer self-adapting control of the highest output pressure of the hydraulic system.

Description

A kind of computer close-loop control adaptive load type hydraulic system
(1) technical field
The utility model relates to a kind of hydraulic system that is used for the structural test system.
(2) background technique
The large-sized structure experiment system is a kind of large-scale instrument that is used for the test structure mechanical property, its development and development, to the Infrastructure that must build in the modernization of the country process of construction such as: the design check of super-high buildings, subway, airport, office building, auditoriums, hotels, Longspan Bridge, airliner, space shuttle, jumbo ship, ocean platform, nuclear power plant etc., optimize, checking has landmark meaning.
Because application standard sample or small-scale model are inferred the complete reliable data that are difficult to obtain the overall structure performance, in order to satisfy the above-mentioned requirements of objective reality, modern structural experiment must be finished by the single component test in past and test and the full size cun conversion of testing to overall structure.And the structure of forming for composite material, even carry out multi parameter analysis with computer and also be difficult to infer, must carry out for guaranteeing safety near practical structures or full scale test.Simultaneously, the science and technology development particularly develop rapidly of computer technology, electronic technology, automatic control technology and hydraulic servo technology provides solid foundation for the development of structural test and monitoring technology, for design, test and the monitoring of various labyrinths provides sound assurance, promoted the development of structural design theory.Therefore, in the world each state all in the developmental research of being devoted to the large-sized structure experiment instrument.
The existing hydraulic system that is used for the structural test system mostly is level pressure control, the system pressure that is hydraulic oil source keeps constant along with the test rising of power or decline, thereby make that the reactive power consumption of hydraulic system is quite big, do not meet the developing direction of modern society's energy-saving and environmental protection.
(3) model utility content
Technical problem to be solved in the utility model is to provide the hydraulic system of a kind of non-constant pressure, computer-based adaptive control.
Described computer close-loop control adaptive load type hydraulic system, comprise the Oil pump electrical machinery group, the Oil pump electrical machinery group connects servo-cylinder through servovalve, described hydraulic system also is provided with closed control circuit, described closed control circuit is by pressure transducer, signal amplification circuit, analog to digital conversion circuit, process control machine, D/A converting circuit and proportional pressure control valve are formed, the pressure transducer input end connects servo-cylinder, the pressure transducer output terminal is through signal amplification circuit connection mode number conversion circuit input end, the analog to digital conversion circuit output terminal is connected process control machine respectively with the D/A converting circuit input end, the D/A converting circuit output terminal connects proportional pressure control valve and servovalve respectively, and proportional pressure control valve connects the Oil pump electrical machinery group.
Further, be provided with high pressure filter between described Oil pump electrical machinery group and the servovalve.
The utility model provides a kind of hydraulic system that is used for the non-constant pressure control of structural test system, the system pressure of hydraulic oil source is at process control machine--rises along with the rising of test power under the control of electric-hydraulic proportion pressure valve control system, descend along with the decline of test power, realized the computer-based adaptive control of the high output pressure of hydraulic system, make the reactive power consumption of hydraulic system descend greatly, meet the developing direction of modern society's energy-saving and environmental protection.
(4) description of drawings
Fig. 1 is the structural representation of the described computer close-loop control adaptive load of embodiment type hydraulic system.
(5) embodiment
Below by embodiment the utility model is made preferably specific description, but protection domain of the present utility model is not limited to this.
With reference to Fig. 1, a kind of computer close-loop control adaptive load type hydraulic system, comprise Oil pump electrical machinery group 1, Oil pump electrical machinery group 1 connects servo-cylinder 3 through servovalve 2, described hydraulic system is provided with closed control circuit, described closed control circuit is by pressure transducer 4, signal amplification circuit 5, analog to digital conversion circuit 6, process control machine 7, D/A converting circuit 8 and proportional pressure control valve 9 are formed, pressure transducer 4 input ends connect servo-cylinder 3, pressure transducer 4 output terminals connect analog to digital conversion circuit 6 input ends through signal amplification circuit 5, analog to digital conversion circuit 6 output terminals are connected process control machine 7 respectively with D/A converting circuit 8 input ends, D/A converting circuit 8 output terminals connect proportional pressure control valve 9 and servovalve 2 respectively, and proportional pressure control valve 9 connects Oil pump electrical machinery group 1.
Be provided with high pressure filter 10 between described Oil pump electrical machinery group 1 and the servovalve 2.
In the process of the test, process control machine 7 records the working pressure by pressure transducer 4 detected servo-cylinders 3 after mould is put the conversion sampling.Process control machine 7 sends control signal through analog-to-digital conversion and gives proportional pressure control valve 9, the delivery pressure of control rising or reduction hydraulic system oil sources.The delivery pressure of process control machine 7 automated closed-loop resize ratio relief valve controlled hydraulic system oil sources makes it to satisfy the requirement of servovalve to valve port two ends pressure reduction.Like this, when the working pressure of servo-cylinder reduces, the delivery pressure of hydraulic system oil sources also decreases, when the working pressure of servo-cylinder raises, the delivery pressure of hydraulic system oil sources also increases, really realize the load auto-adaptation of hydraulic system oil supply pressure, greatly reduced the reactive power consumption of hydraulic system.

Claims (2)

1, a kind of computer close-loop control adaptive load type hydraulic system, comprise the Oil pump electrical machinery group, the Oil pump electrical machinery group connects servo-cylinder through servovalve, it is characterized in that described hydraulic system also is provided with closed control circuit, described closed control circuit is by pressure transducer, signal amplification circuit, analog to digital conversion circuit, process control machine, D/A converting circuit and proportional pressure control valve are formed, the pressure transducer input end connects servo-cylinder, the pressure transducer output terminal is through signal amplification circuit connection mode number conversion circuit input end, the analog to digital conversion circuit output terminal is connected process control machine respectively with the D/A converting circuit input end, the D/A converting circuit output terminal connects proportional pressure control valve and servovalve respectively, and proportional pressure control valve connects the Oil pump electrical machinery group.
2, computer close-loop control adaptive load type hydraulic system as claimed in claim 1 is characterized in that being provided with high pressure filter between described Oil pump electrical machinery group and the servovalve.
CNU2008200880711U 2008-05-30 2008-05-30 Adaptation type hydraulic system of closed-loop control load for computer Expired - Fee Related CN201228693Y (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CNU2008200880711U CN201228693Y (en) 2008-05-30 2008-05-30 Adaptation type hydraulic system of closed-loop control load for computer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CNU2008200880711U CN201228693Y (en) 2008-05-30 2008-05-30 Adaptation type hydraulic system of closed-loop control load for computer

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Publication Number Publication Date
CN201228693Y true CN201228693Y (en) 2009-04-29

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102225735A (en) * 2011-04-28 2011-10-26 上海三一科技有限公司 Feedback compensation type brake control scheme with adaptive function
CN103075389A (en) * 2013-01-23 2013-05-01 北京理工大学 Hydraulic oil supply system for machine tool which rolls and strengthens torque shaft surface
CN103502655A (en) * 2010-12-17 2014-01-08 派克汉尼芬公司 Hydraulic system with return pressure control
CN104154053A (en) * 2014-07-18 2014-11-19 国家电网公司 Main-cylinder hydraulic loop system
CN106015139A (en) * 2016-07-20 2016-10-12 浙江大学 Tension and compression testing machine hydraulic loading system adopting differential control of proportional overflow valves
CN108397443A (en) * 2018-03-22 2018-08-14 佛山鑫进科技有限公司 A kind of Closed Hydraulic Cable Power Computation machine detecting device

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103502655A (en) * 2010-12-17 2014-01-08 派克汉尼芬公司 Hydraulic system with return pressure control
CN103502655B (en) * 2010-12-17 2016-01-20 派克汉尼芬公司 There is the hydraulic system that back pressure controls
CN102225735A (en) * 2011-04-28 2011-10-26 上海三一科技有限公司 Feedback compensation type brake control scheme with adaptive function
CN102225735B (en) * 2011-04-28 2014-07-23 上海三一科技有限公司 Feedback compensation type brake control scheme with adaptive function
CN103075389A (en) * 2013-01-23 2013-05-01 北京理工大学 Hydraulic oil supply system for machine tool which rolls and strengthens torque shaft surface
CN103075389B (en) * 2013-01-23 2015-02-18 北京理工大学 Hydraulic oil supply system for machine tool which rolls and strengthens torque shaft surface
CN104154053A (en) * 2014-07-18 2014-11-19 国家电网公司 Main-cylinder hydraulic loop system
CN106015139A (en) * 2016-07-20 2016-10-12 浙江大学 Tension and compression testing machine hydraulic loading system adopting differential control of proportional overflow valves
CN106015139B (en) * 2016-07-20 2017-10-31 浙江大学 The tensile and compression testing machine hydraulic loading system of adoption rate overflow valve Differential Control
CN108397443A (en) * 2018-03-22 2018-08-14 佛山鑫进科技有限公司 A kind of Closed Hydraulic Cable Power Computation machine detecting device

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C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20090429

Termination date: 20170530

CF01 Termination of patent right due to non-payment of annual fee