CN103884586A - Electro-hydraulic loading system of film biaxial tensile testing machine - Google Patents
Electro-hydraulic loading system of film biaxial tensile testing machine Download PDFInfo
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- CN103884586A CN103884586A CN201410111436.8A CN201410111436A CN103884586A CN 103884586 A CN103884586 A CN 103884586A CN 201410111436 A CN201410111436 A CN 201410111436A CN 103884586 A CN103884586 A CN 103884586A
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Abstract
The invention discloses an electro-hydraulic loading system of a film biaxial tensile testing machine. The electro-hydraulic loading system comprises a low-pressure filter, hydraulic pumps, a motor, a one-way valve, a stop valve, an energy storage device, an electromagnetic unloading valve, a proportional overflow valve, a pressure compensator, a proportional directional valve, a servo hydraulic cylinder, a pull pressure sensor, a displacement sensor, a mechanical fixture, a filter, a cooler and an oil tank, wherein the two hydraulic pumps share the one oil tank, and two independent loading hydraulic loops can be formed, so that the manufacturing cost and the installation space are greatly saved. Furthermore, the servo hydraulic cylinder can be controlled by the single set of pressure compensator and proportional directional valve, so that loading synchronism and stability can be guaranteed. The electro-hydraulic loading system of the film biaxial tensile testing machine has the characteristics of being simple in structure, large in tensile force, high in loading synchronism and accuracy, rapid in control response and the like, and can be used for film composite material biaxial tensile testing machines such as an architectural membrane material tester and an airship skin test as well as a uniaxial drawing tester.
Description
Technical field
The present invention relates to the dynamo-electric liquid loading system of a kind of tension test, relate in particular to a kind of electro-hydraulic loading system of thin-film biaxial tensile testing machine.
Background technology
Macromolecule compound fabric membraneous material has the advantages such as lightweight, high-strength, chemically-resistant, permanance in industrial circle application such as modern building fabric field, Aero-Space, as building membrane structure, aviation dirigible, space flight parachute or soft landing system etc. because of it.Film of fabric is generally made up of base cloth and coating, base cloth is by the macromolecular material synthon that reel off raw silk from cocoons, then be made into cloth, 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, film of fabric material has complicated mechanical behavior feature, shows as material nonlinearity, non-resilient, anisotropy, viscoelasticity, amphicheirality etc.
The mechanical behavior feature of film of fabric material generally obtains by cupping machine, and electric liquid loading system is an important component part of cupping machine.The dynamo-electric liquid loading system of tension test generally comprises air pressure, hydraulic pressure, stepper motor and corresponding automatically controlled and sensor-based system.General universal structure laboratory electricity liquid loading system (as MTS etc.) structure is very complicated, and expensive, so far seldom there is the specific electric liquid loading system for the biaxial stretch-formed testing machine of film, therefore the domestic main mechanical parameter about film of fabric material, design criteria in application are mainly derived from unidirectional experiment at present, and utilize the experiment of two-way mechanical behavior of the biaxial stretch-formed testing machine test fabric of film membraneous material less, so exploitation electro-hydraulic loading system of thin-film biaxial tensile testing machine tool is of great significance.
Through the retrieval of prior art document is found, Chinese Patent Application No. 201110107672.9, patent name: electro-hydraulic loading system of thin-film biaxial tensile testing machine, this patent adopts the integrated systems such as servo hydraulic cylinder, proportional pressure control valve, proportional reversing valve to realize the collaborative loading of binary channels four cylinders, but loading synchronous and pressurize are undesirable.
Therefore, those skilled in the art is devoted to develop a kind of simple in structure, loading synchronous is high, pressurize is effective electro-hydraulic loading system of thin-film biaxial tensile testing machine.
Summary of the invention
Because the above-mentioned defect of prior art, technical matters to be solved by this invention is to provide a kind of simple in structure, loading synchronous is high, pressurize is effective electro-hydraulic loading system of thin-film biaxial tensile testing machine.
For achieving the above object, the invention provides a kind of improved electro-hydraulic loading system of thin-film biaxial tensile testing machine, comprise low-pressure filter, hydraulic pump, motor, retaining valve, stop valve, accumulator, unloading electromagnetic valve, proportional pressure control valve, pressure compensator, proportional reversing valve, servo hydraulic cylinder, pull pressure sensor, displacement transducer, mechanical clamp, filtrator, refrigeratory and fuel tank;
Described servo hydraulic cylinder is connected successively with described displacement transducer, described pull pressure sensor and described mechanical clamp;
The delivery outlet of described fuel tank is connected with described low-pressure filter, described hydraulic pump, described motor and described retaining valve successively, and is connected with the described proportional pressure control valve of bypass, then connects oil feed line; The oil suction chamber of described servo hydraulic cylinder is connected with described proportional reversing valve, described pressure compensator, described stop valve and described accumulator successively, realizes fuel feeding by oil feed line;
Described unloading electromagnetic valve is connected with the input port of described filtrator, described refrigeratory and described fuel tank successively, connects return line, realizes oil return; The oil back chamber of described servo hydraulic cylinder connects described proportional reversing valve, is back to fuel tank by return line;
Described servo hydraulic cylinder, by described oil feed line and described return line, is connected with described fuel tank, forms circulating oil path.
Further, described servo hydraulic cylinder is provided with four; Described four orthogonal thereto layouts of servo hydraulic cylinder, form four hydraulic loaded ends; Described circulating oil path comprises a described fuel tank and two described hydraulic pumps, forms two independently hydraulic loading systems, and each described hydraulic loading system comprises two described pressure compensators and two described proportional reversing valves; In each described hydraulic loading system, after described hydraulic pump is fuel-displaced, through described stop valve and described accumulator, then be divided into two described oil feed lines, each described oil feed line is corresponding described servo-hydraulic oil supply cylinder by described proportional reversing valve and described pressure compensator, i.e. a coaxial described servo hydraulic cylinder of described proportional reversing valve control.
Further, described hydraulic pump, after described stop valve and described accumulator, is divided into two described oil feed lines by three-way connection.
Further, described refrigeratory is connected with electromagnetic water valve and multiple stop valve.
Further, described fuel tank adopts stainless steel to make.
Further, described mechanical clamp adopts alloy steel to make.
The improved electro-hydraulic loading system of thin-film biaxial tensile testing machine of one provided by the invention, wherein two hydraulic loading systems share a fuel tank, form two and independently load hydraulic circuit, and be independent of each other between two independent loads hydraulic circuits, greatly dwindle cost of manufacture, saved installing space.The present invention makes full use of servo hydraulic cylinder in addition, proportional pressure control valve, the feature of the various valves such as proportional reversing valve, realize single group pressure compensator and servo hydraulic cylinder of proportional reversing valve control, guarantee loading synchronous and stability, compared with the dynamo-electric liquid loading system of existing tension test, electro-hydraulic loading system of thin-film biaxial tensile testing machine structure of the present invention is simpler, pulling force is larger, loading synchronous is higher, pressurize better effects if, precision is higher, control response is faster, can not only be used for building film material test, the biaxial stretch-formed testing machines of film composite material such as airship envelope test, can also be used for uniaxial tensile test machine.
Brief description of the drawings
Fig. 1 is the structural drawing of the electro-hydraulic loading system of thin-film biaxial tensile testing machine of a preferred embodiment of the present invention.
Embodiment
Below in conjunction with accompanying drawing, embodiments of the invention are elaborated, the present embodiment is implemented under taking technical solution of the present invention as prerequisite, provided detailed embodiment and concrete operating process, but protection domain of the present invention is not limited to following embodiment.
In preferred embodiment of the present invention, as shown in Figure 1, a kind of improved electro-hydraulic loading system of thin-film biaxial tensile testing machine, comprises low-pressure filter 1, hydraulic pump 2, motor 3, retaining valve 4, stop valve 5, accumulator 6, unloading electromagnetic valve 7, proportional pressure control valve 8, pressure compensator 10, proportional reversing valve 11, servo hydraulic cylinder 12, pull pressure sensor 13, displacement transducer 14, mechanical clamp 15, filtrator 16, refrigeratory 17 and fuel tank 18.
Wherein, servo hydraulic cylinder 12 is provided with four, and orthogonal thereto layout, forms four hydraulic loaded ends, and each servo hydraulic cylinder 12 is connected successively with corresponding displacement transducer 14, pull pressure sensor 13 and mechanical clamp 15.
The delivery outlet of fuel tank 18 is connected with the second hydraulic loading system with the first hydraulic loading system respectively, and two hydraulic loading systems are formed by connecting by the proportional pressure control valve 8 of low-pressure filter 1, hydraulic pump 2, motor 3, retaining valve 4 and bypass; In each hydraulic loading system, hydraulic pump 2, after stop valve 5 and accumulator 6, is divided into two oil feed lines 19 by three-way connection.The oil suction chamber of each servo hydraulic cylinder 12 successively proportional reversing valve 11, the pressure compensator 10 corresponding with it connects, and then, by each self-corresponding oil feed line, realizes fuel feeding.
Two unloading electromagnetic valves 7 are all connected with filtrator 16, refrigeratory 17 and the input port of fuel tank 18 successively, form two return lines 20, realize oil return.Wherein refrigeratory 17 is connected with electromagnetic water valve 9 by stop valve 5.The oil back chamber of each servo hydraulic cylinder 12 connects the proportional reversing valve 11 that it is corresponding, is back to fuel tank by each self-corresponding return line.
Each servo hydraulic cylinder 12, by its corresponding oil feed line and return line, is connected with fuel tank 18, forms circulating oil path.
In the electro-hydraulic loading system of thin-film biaxial tensile testing machine of preferred embodiment of the present invention, two hydraulic pumps share a fuel tank 18, form two and independently load hydraulic circuit, respectively control two wherein coaxial servo hydraulic cylinders 12, and two independently load between hydraulic circuit and be independent of each other, cost of manufacture and installing space are greatly saved.The present invention makes full use of servo hydraulic cylinder 12 in addition, proportional pressure control valve 8, the feature of the various valves such as proportional reversing valve 11, realize single group pressure compensator 10 and proportional reversing valve 11 and control a servo hydraulic cylinder 12, loading synchronous and stability are guaranteed, compared with the dynamo-electric liquid loading system of existing tension test, electro-hydraulic loading system of thin-film biaxial tensile testing machine structure of the present invention is simpler, pulling force is larger, loading synchronous is higher, pressurize better effects if, precision is higher, control response is faster, can not only be used for building film material test, the biaxial stretch-formed testing machines of film composite material such as airship envelope test, can also be used for uniaxial tensile test machine.
Scantling of the present invention, material is selected, technological design can be determined for 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, stop valve 5, accumulator 6, unloading electromagnetic valve 7, proportional pressure control valve 8, pressure compensator 10, proportional reversing valve 11, servo hydraulic cylinder 12, pull pressure sensor 13, displacement transducer 14, filtrator 16, refrigeratory 17, the model parameter of oil inlet pipe and scavenge pipe, all select by matching parameter, fuel tank 18 can adopt stainless steel to make, mechanical clamp 15 can adopt alloy steel to make.
More than describe preferred embodiment of the present invention in detail.The ordinary skill that should be appreciated that this area just can design according to the present invention be made many modifications and variations without creative work.Therefore, all technician in the art, all should be in by the determined protection domain of claims under this invention's idea on the basis of existing technology by the available technical scheme of logical analysis, reasoning, or a limited experiment.
Claims (9)
1. an electro-hydraulic loading system of thin-film biaxial tensile testing machine, it is characterized in that, comprise low-pressure filter, hydraulic pump, motor, retaining valve, stop valve, accumulator, unloading electromagnetic valve, proportional pressure control valve, pressure compensator, proportional reversing valve, servo hydraulic cylinder, pull pressure sensor, displacement transducer, mechanical clamp, filtrator, refrigeratory and fuel tank;
Described servo hydraulic cylinder is connected successively with described displacement transducer, described pull pressure sensor and described mechanical clamp;
The delivery outlet of described fuel tank is connected with described low-pressure filter, described hydraulic pump, described motor and described retaining valve successively, and is connected with the described proportional pressure control valve of bypass, then connects oil feed line; The oil suction chamber of described servo hydraulic cylinder is connected with described proportional reversing valve, described pressure compensator, described stop valve and described accumulator successively, realizes fuel feeding by oil feed line;
Described unloading electromagnetic valve is connected with the input port of described filtrator, described refrigeratory and described fuel tank successively, connects return line, realizes oil return; The oil back chamber of described servo hydraulic cylinder connects described proportional reversing valve, is back to fuel tank by return line;
Described servo hydraulic cylinder, by described oil feed line and described return line, is connected with described fuel tank, forms circulating oil path.
2. electro-hydraulic loading system of thin-film biaxial tensile testing machine as claimed in claim 1, is characterized in that, described servo hydraulic cylinder is provided with four.
3. electro-hydraulic loading system of thin-film biaxial tensile testing machine as claimed in claim 2, is characterized in that, described four orthogonal thereto layouts of servo hydraulic cylinder, form four hydraulic loaded ends.
4. electro-hydraulic loading system of thin-film biaxial tensile testing machine as claimed in claim 2, it is characterized in that, described circulating oil path comprises a described fuel tank and two described hydraulic pumps, form two independently hydraulic loading systems, each described hydraulic loading system comprises two described pressure compensators and two described proportional reversing valves.
5. electro-hydraulic loading system of thin-film biaxial tensile testing machine as claimed in claim 4, it is characterized in that, in each described hydraulic loading system, after described hydraulic pump is fuel-displaced, through described stop valve and described accumulator, then be divided into two described oil feed lines, each described oil feed line is corresponding described servo-hydraulic oil supply cylinder by described proportional reversing valve and described pressure compensator, i.e. a coaxial described servo hydraulic cylinder of described proportional reversing valve control.
6. electro-hydraulic loading system of thin-film biaxial tensile testing machine as claimed in claim 5, is characterized in that, described hydraulic pump, after described stop valve and described accumulator, is divided into two described oil feed lines by three-way connection.
7. electro-hydraulic loading system of thin-film biaxial tensile testing machine as claimed in claim 1, is characterized in that, described refrigeratory is connected with electromagnetic water valve and multiple stop valve.
8. electro-hydraulic loading system of thin-film biaxial tensile testing machine as claimed in claim 1, is characterized in that, described fuel tank adopts stainless steel to make.
9. electro-hydraulic loading system of thin-film biaxial tensile testing machine as claimed in claim 1, is characterized in that, described mechanical clamp adopts alloy steel to make.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108760507A (en) * | 2018-04-10 | 2018-11-06 | 泰州职业技术学院 | A kind of cupping machine |
| CN109342221A (en) * | 2018-12-13 | 2019-02-15 | 中科航空动力(株洲)装备制造研究院有限公司 | Fabric breaking strength test device |
| 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 |
| CN110005646A (en) * | 2019-04-01 | 2019-07-12 | 浙江大学 | A kind of digital electro-hydraulic loading device and its loading method suitable for big load section |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN109342221A (en) * | 2018-12-13 | 2019-02-15 | 中科航空动力(株洲)装备制造研究院有限公司 | Fabric breaking strength test device |
| CN110005646A (en) * | 2019-04-01 | 2019-07-12 | 浙江大学 | A kind of digital electro-hydraulic loading device and its loading method suitable for big load section |
| 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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Application publication date: 20140625 |