CN102269671A - Electro-hydraulic loading system of thin-film biaxial tensile testing machine - Google Patents
Electro-hydraulic loading system of thin-film biaxial tensile testing machine Download PDFInfo
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- CN102269671A CN102269671A CN 201110107672 CN201110107672A CN102269671A CN 102269671 A CN102269671 A CN 102269671A CN 201110107672 CN201110107672 CN 201110107672 CN 201110107672 A CN201110107672 A CN 201110107672A CN 102269671 A CN102269671 A CN 102269671A
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Abstract
The invention provides an electro-hydraulic loading system of a thin-film biaxial tensile testing machine, belonging to the technical field of mechanics of materials and building materials. The system provided by the invention comprises a low-pressure filter, a hydraulic pump, a motor, a check valve, a pressure sensor, a stop valve, a power accumulator, an electromagnetic unloading valve, a proportional overflow valve, a throttling valve, an electromagnetic directional valve, four servo hydraulic cylinders, a drawing force and compression force sensor, a displacement sensor, a mechanical clamp, a filter, a cooler, an electromagnetic water valve, an oil tank and a unidirectional intercept valve. The system provided by the invention has the advantages of great drawing force, high precision, fast control response, simplicity, special purpose, movability and independent use and can be used for the thin-film composite material biaxial tensile testing machines of construction film material tests, airship skin tests and the like.
Description
Technical field
The present invention relates to the device of a kind of mechanics of materials and building material technical field, be specifically related to the dynamo-electric liquid loading system of the biaxial stretch-formed test of a kind of film.
Background technology
Macromolecule compound fabric membraneous material lightweight, high-strength, chemically-resistant, permanance and use at industrial circles such as modern building fabric field, Aero-Space are as building membrane structure, aviation dirigible, space flight parachute or soft landing system etc.Film of fabric generally has base cloth and coating to constitute, base cloth is by the macromolecular material synthon that reel off raw silk from cocoons, be made into cloth then, mainly contain dacron, glass fibre etc. at building field, mainly contain dacron, aramid fiber, nylon fiber etc. at aerospace field, coating mainly contains teflon, poly-inclined to one side tetrafluoroethene, adopts coating or laminated, and substrate laminated or coating also has other chemical colloid.Therefore, the film of fabric material has complicated mechanical behavior feature, shows as material nonlinearity, non-resilient, anisotropy, viscoelasticity, amphicheirality etc.Domestic main mechanics parameter about the film material, design at present used according to being mainly derived from single pass test, test, the analysis and research of carrying out the two-way mechanical behavior of film material arranged in recent years, and obtained impressive progress and achievement in research.
The dynamo-electric liquid loading system of tension test generally has air pressure, hydraulic pressure, motor and corresponding automatically controlled and sensor-based system.The cylinder of air pressure is big, pressure is little, needs the large-scale air compressor machine of pneumatic supply; Motor and leading screw matching design, stepper motor can realize degree of precision and big pulling force; Hydraulic pressure has that cylinder is little, pulling force is big, response is fast, precision is high, but does not have specific hydraulic electric control loading system at the biaxial stretch-formed testing machine of film, and general versatility structural test chamber hydraulic electric control loads as MTS etc. very complicated, expensive.
Find through retrieval prior art, " membrane structure engineering design " China Construction Industry Press of Chen Wujun work, 2005.3. introduces film material parameter, tear test method, gas cell dual-spindle testing method; " multifunctional membrane structure tester " ZL20041006758.7 of Chen Wujun, Fu Gongyi work has developed multifunctional membrane structure tester, adopts leading screw and link mechanism to load, and the loading ratio is restricted and precision is low; " the biaxial stretch-formed test of membraneous material " engineering mechanics of Liu Wenbin, Yu Jinghai, Wu Jiansheng work, 1998,152:138-145 has developed inflation twin shaft test unit, adopts grating measuring to survey big strain, and has carried out the analysis of membrane material attribute testing; " development of the biaxial stretch-formed testing machine of membrane structure and exploitation " science and technology and engineering of Chen Lu, Li Yang, Zhang Qilin, Yang Zonglin work, 2006, the biaxial stretch-formed testing machine of membrane structure has been introduced in the 61:17-23 development, adopt motor as power, connect leading screw, force transducer, displacement transducer etc. and realize two-way loading and control; " the mechanical property research of building film material material and membrane structure and application " Tongji University's doctorate paper of Li Yangzhu, 2007.8 have studied biaxial stretch-formed testing machine, have customized to load spectrum and test method; " application of Digital Image Correlation Method in the tension test of film material " engineering mechanics of Sun Wei, He Xiaoyuan, Xu Ming, Luo Binzhu, 2007, the strain field test analysis that 242:34-39 has adopted digital correlation method to carry out biaxial stretch-formed test, special-purpose pilot system, the wide 200mm of cross test specimen limb; The tension test of the nonlinear analysis of jacking membrane structure and the fabric membrane material " research " Southeast China University's doctorate paper of Luo Binzhu, 2003.9 studied membrane structure look for shape, load and cutting nonlinear analysis method, and carried out biaxial stretch-formed experimental study; " evaluation method of building film material material biaxial stretching elastic constant " engineering mechanics of Yi Honglei, fourth suffering, Chen Shouhui work, 2006,2310:180-184 has studied that the film material is unidirectional, the computing method of biaxial tensile test elastic constant; " the biaxial stretch-formed experimental study of PVC membrane material and engineering thereof are used " Shanghai University's master thesis of Ni Jingzhu, 2008.1 utilize Zwick/Rocell-Z010/TH2A to carry out test of multi-state twin shaft and parameter analysis, this testing machine is that two uniaxial test machine orthogonal sets merging customization loading spectrums form, maximum pull 10kN, the wide only 60mm of test specimen spider.
Summary of the invention
The objective of the invention is to deficiency at existing simple and easy twin shaft test unit or general test loading system, provide the biaxial stretch-formed test of a kind of film dynamo-electric liquid loading system, have that pulling force is big, precision is high, control response is fast, simple, special-purpose, removable, the independent use, can be used for the biaxial stretch-formed testing machines of film composite material such as building film material test, airship envelope test.
The present invention is achieved by the following technical solutions, the present invention includes: low-pressure filter, hydraulic pump, motor, retaining valve, pressure transducer, stop valve, accumulator, unloading electromagnetic valve, proportional pressure control valve, throttling valve, solenoid directional control valve, four servo hydraulic cylinders, pull pressure sensor, displacement transducer, mechanical clamp, filtrator, refrigeratory, the electromagnetism water valve, fuel tank and unidirectional intercepting valve, it is characterized in that: four servo hydraulic cylinders and corresponding displacement transducer, pull pressure sensor and mechanical clamp are connected successively, the delivery outlet of fuel tank successively with low-pressure filter, hydraulic pump, motor links to each other with retaining valve and by proportional pressure control valve bypass fuel feeding, unloading electromagnetic valve successively with refrigeratory, the input port of filtrator and fuel tank links to each other and realizes oil return, the oil suction chamber of each servo hydraulic cylinder successively with pressure transducer, stop valve, accumulator, throttling valve links to each other with solenoid directional control valve and realizes fuel feeding, the oil back chamber of each servo hydraulic cylinder is back to fuel tank by return line and forms a circulating oil path, and unidirectional intercepting valve is arranged at pressure transducer front end oil inlet pipe.
Described four servo hydraulic cylinder quadrature arrangement become four loading ends.
Described oil circuit has two fuel tanks and oil supply system to form two independent loads hydraulic circuits.
The present invention makes full use of the characteristics of various valves such as servo hydraulic cylinder, motor, proportional pressure control valve, realize that the dynamo-electric liquid loading system pulling force of the biaxial stretch-formed test of novel thin film is big, precision is high, control response is fast, simple, special-purpose, removable, can be applicable to uniaxial tensile test machine, biaxial stretch-formed testing machine etc.
In the prior art document, no specific hydraulic electric control loading system at the biaxial stretch-formed testing machine of film does not realize the system that single twin shaft loads simultaneously yet, and simultaneously general versatility structural test chamber hydraulic electric control loads very complicated, expensive.
Description of drawings
Fig. 1 is the dynamo-electric liquid loading system figure of the biaxial stretch-formed test of film;
Among the figure: 1 low-pressure filter, 2 hydraulic pumps, 3 motors, 4 retaining valves, 5 pressure transducers, 6 stop valves, 7 accumulators, 8 unloading electromagnetic valves, 9 proportional pressure control valves, 10 throttling valve, 11 solenoid directional control valves, 12 servo hydraulic cylinders, 13 pull pressure sensor, 14 displacement transducers, 15 mechanical clamps, 16 filtrators, 17 refrigeratorys, 18 fuel tanks, 19 unidirectional intercepting valves.
Embodiment
Below embodiments of the invention are elaborated, present embodiment is being to implement under the prerequisite with the technical solution of the present invention, provided detailed embodiment and concrete operating process, but protection scope of the present invention is not limited to following embodiment.
As shown in Figure 1, present embodiment comprises low-pressure filter 1, hydraulic pump 2, motor 3, retaining valve 4, pressure transducer 5, stop valve 6, energy storage 7 devices, unloading electromagnetic valve 8, proportional pressure control valve 9, throttling valve 10, solenoid directional control valve 11, servo hydraulic cylinder 12, pull pressure sensor 13, displacement transducer 14, mechanical clamp 15, filtrator 16, refrigeratory 17, fuel tank 18, unidirectional intercepting valve 19, wherein: four servo hydraulic cylinder 12 quadrature arrangement become four loading ends, each servo hydraulic cylinder 12 vicinal displacement sensor 14, connect pull pressure sensor 13, connect mechanical clamp 15 again, servo hydraulic cylinder 12 oil suction chambers and oil back chamber connect pressure transducer 5 respectively, in pressure transducer 5 front end oil inlet pipe orders to intercepting valve 19.From fuel tank 18 oil-feeds, through low-pressure filter 1, hydraulic pump 2, motor 3, retaining valve 4, by proportional pressure control valve 9 bypass fuel feeding, by unloading electromagnetic valve 8 oil returns, and, being back to fuel tank 18 through refrigeratory 17, filtrator 16, oil-feed is by pressure transducer 5, stop valve 6, accumulator 7, and through throttling valve 10, solenoid directional control valve 11 to two servo hydraulic cylinders, 12 oil suction chamber fuel feeding, oil back chamber is back to 18 one-tenth oil circuits of fuel tank by return line.Two fuel tanks 18 and oil supply system form two independent loads hydraulic circuits.
The scantling of present embodiment, material is selected, technological design can be determined at concrete application, comprise fuel tank 18, the geometric parameter of mechanical clamp 15, low-pressure filter 1, hydraulic pump 2, motor 3, retaining valve 4, pressure transducer 5, stop valve 6, energy storage 7 devices, unloading electromagnetic valve 8, proportional pressure control valve 9, throttling valve 10, solenoid directional control valve 11, servo hydraulic cylinder 12, pull pressure sensor 13, displacement transducer 14, filtrator 16, refrigeratory 17, unidirectional intercepting valve 19, the model parameter of oil inlet pipe and scavenge pipe, select by matching parameter, fuel tank 18 can adopt stainless steel, and mechanical clamp 15 can adopt alloy steel.
Claims (3)
1. dynamo-electric liquid loading system of the biaxial stretch-formed test of novel thin film, comprise: low-pressure filter, hydraulic pump, motor, retaining valve, pressure transducer, stop valve, accumulator, unloading electromagnetic valve, proportional pressure control valve, throttling valve, solenoid directional control valve, four servo hydraulic cylinders, pull pressure sensor, displacement transducer, mechanical clamp, filtrator, refrigeratory, the electromagnetism water valve, fuel tank and unidirectional intercepting valve, it is characterized in that: four servo hydraulic cylinders and corresponding displacement transducer, pull pressure sensor and mechanical clamp are connected successively, the delivery outlet of fuel tank successively with low-pressure filter, hydraulic pump, motor links to each other with retaining valve and by proportional pressure control valve bypass fuel feeding, unloading electromagnetic valve successively with refrigeratory, the input port of filtrator and fuel tank links to each other and realizes oil return, the oil suction chamber of each servo hydraulic cylinder successively with pressure transducer, stop valve, accumulator, throttling valve links to each other with solenoid directional control valve and realizes fuel feeding, the oil back chamber of each servo hydraulic cylinder is back to fuel tank by return line and forms a circulating oil path, and unidirectional intercepting valve is arranged at pressure transducer front end oil inlet pipe.
2. according to the dynamo-electric liquid loading system of the biaxial stretch-formed test of the film of claim 1, it is characterized in that described four servo hydraulic cylinder quadrature arrangement become four loading ends.
3. according to the dynamo-electric liquid loading system of the biaxial stretch-formed test of the film of claim 1, it is characterized in that described oil circuit has two fuel tanks and oil supply system to form two independent loads hydraulic circuits.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011101076729A CN102269671B (en) | 2011-04-28 | 2011-04-28 | Electro-hydraulic loading system of thin-film biaxial tensile testing machine |
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| CN2011101076729A CN102269671B (en) | 2011-04-28 | 2011-04-28 | Electro-hydraulic loading system of thin-film biaxial tensile testing machine |
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| CN102269671B CN102269671B (en) | 2012-11-28 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104006972A (en) * | 2014-05-07 | 2014-08-27 | 江苏大学 | Electric vehicle regenerative brake test loading mechanism and method |
| CN104314893A (en) * | 2014-08-27 | 2015-01-28 | 南京创贝高速传动机械有限公司 | Hydraulic servo control test bed system |
| CN104897489A (en) * | 2015-06-30 | 2015-09-09 | 华东建筑设计研究院有限公司 | Test device and method of biaxial mechanical capability of ETFE (ethylene tetra fluoro ethylene) film |
| CN105092374A (en) * | 2015-06-03 | 2015-11-25 | 中国矿业大学 | Test method suitable for elastic modulus of coated fabric membrane material in model test |
| CN106801690A (en) * | 2017-01-04 | 2017-06-06 | 潍柴动力股份有限公司 | A kind of hydraulic system for the experiment of hydraulic pump driving system loads |
| CN109870347A (en) * | 2019-04-17 | 2019-06-11 | 中国科学院深海科学与工程研究所 | Mechanical property testing system and method under material deep water hyperpressure state |
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| DE3617455A1 (en) * | 1986-05-23 | 1987-11-26 | Messerschmitt Boelkow Blohm | Double-axle loading device for planar sample elements |
| CN1865910A (en) * | 2006-06-02 | 2006-11-22 | 清华大学 | Vertical double-shaft four-cylinder electro-hydraulic servo testing machine |
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| JP2009244183A (en) * | 2008-03-31 | 2009-10-22 | Mitsubishi Materials Corp | Two-axis tensile test device |
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2011
- 2011-04-28 CN CN2011101076729A patent/CN102269671B/en active Active
Patent Citations (4)
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| DE3617455A1 (en) * | 1986-05-23 | 1987-11-26 | Messerschmitt Boelkow Blohm | Double-axle loading device for planar sample elements |
| CN2852103Y (en) * | 2005-10-21 | 2006-12-27 | 上海同磊土木工程技术有限公司 | Film material stretching tester |
| CN1865910A (en) * | 2006-06-02 | 2006-11-22 | 清华大学 | Vertical double-shaft four-cylinder electro-hydraulic servo testing machine |
| JP2009244183A (en) * | 2008-03-31 | 2009-10-22 | Mitsubishi Materials Corp | Two-axis tensile test device |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104006972A (en) * | 2014-05-07 | 2014-08-27 | 江苏大学 | Electric vehicle regenerative brake test loading mechanism and method |
| CN104006972B (en) * | 2014-05-07 | 2017-11-17 | 江苏大学 | A kind of electric automobile regenerative braking experiment load maintainer and loading method |
| CN104314893A (en) * | 2014-08-27 | 2015-01-28 | 南京创贝高速传动机械有限公司 | Hydraulic servo control test bed system |
| CN105092374A (en) * | 2015-06-03 | 2015-11-25 | 中国矿业大学 | Test method suitable for elastic modulus of coated fabric membrane material in model test |
| CN104897489A (en) * | 2015-06-30 | 2015-09-09 | 华东建筑设计研究院有限公司 | Test device and method of biaxial mechanical capability of ETFE (ethylene tetra fluoro ethylene) film |
| CN106801690A (en) * | 2017-01-04 | 2017-06-06 | 潍柴动力股份有限公司 | A kind of hydraulic system for the experiment of hydraulic pump driving system loads |
| CN106801690B (en) * | 2017-01-04 | 2019-08-27 | 潍柴动力股份有限公司 | A kind of hydraulic system for the test of hydraulic pump driving system loads |
| CN109870347A (en) * | 2019-04-17 | 2019-06-11 | 中国科学院深海科学与工程研究所 | Mechanical property testing system and method under material deep water hyperpressure state |
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