CN104179740B - A kind of hydraulic system of Double Tops cylinder structure - Google Patents
A kind of hydraulic system of Double Tops cylinder structure Download PDFInfo
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- CN104179740B CN104179740B CN201410359071.0A CN201410359071A CN104179740B CN 104179740 B CN104179740 B CN 104179740B CN 201410359071 A CN201410359071 A CN 201410359071A CN 104179740 B CN104179740 B CN 104179740B
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Abstract
The invention discloses a kind of hydraulic system of Double Tops cylinder structure, comprise fuel tank, oil pump, one-way valve, high pressure filter, pressure gauge, guide's electromagnetic relief valve, proportional velocity regulating valve, solenoid directional control valve, pressure transducer, driving oil cylinder, fixed support, pull pressure sensor, suspended slider link, displacement transducer, loading cylinders, proportional pressure valve, cooler, return filter and pipeline.Hydraulic system passing ratio pressure valve and proportional velocity regulating valve be control load power size and displacement amount respectively, and this load mode has stepless adjustable, can active and passively load, and can load by tension compression bidirectional, can the step response of realizable force, builds the features such as the pressure time is short.The present invention can be widely used in as experimental research provides load force, the simulation industry spot extruding force process loaded flexibly, provides a kind of solution feasible flexibly for needing the experimental system producing load force.
Description
Technical field
The present invention relates to a kind of hydraulic system of Double Tops cylinder structure, particularly a kind of for providing the load force loaded flexibly, the hydraulic system simulating industry spot extruding force process for laboratory.
Background technique
In experimental research, often need for actuator provides certain load, this load not only comprises a power while producing, and also can produce certain displacement; As the extrusion process of extrusion press, the material of extruding not only can have a resistivity to extrusion press moved cross beam, but also can distortion be compressed, this resistivity has the trend of non-linear increase along with the increase of compressive strain, therefore in the process of simulation loading, require this load force (resistivity) can realize stepless adjustable, the response time is short.And general power load mode such as gravitational load and spring load, all cannot provide for actuator the load force and displacement met the demands.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of hydraulic system that can realize stepless adjustable, Double Tops cylinder structure that the response time is short.
In order to solve the problems of the technologies described above, the hydraulic system of Double Tops cylinder structure provided by the invention, comprise fuel tank, oil cylinder and loading cylinders centering is driven to be arranged on fixed support, the piston rod of described driving oil cylinder and the piston rod of described loading cylinders are fixedly connected to form Double Tops cylinder structure with pull pressure sensor both ends of the surface respectively, also comprise the displacement transducer of the real-time displacement value of the piston rod of the Double Tops cylinder structure described in a mensuration; Comprise a solenoid directional control valve, described solenoid directional control valve is three-position four-way electromagnetic directional valve, oily delivery side of pump is driven to be connected with the import of proportional velocity regulating valve, the outlet of described proportional velocity regulating valve is connected with an import of described solenoid directional control valve, two of described solenoid directional control valve outlets are connected with the rod chamber of described driving oil cylinder and rodless cavity respectively, and the oily delivery side of pump of described driving is also connected with guide's electromagnetic relief valve; The rod chamber of described loading cylinders is connected with the first load oil pump and the second load oil pump respectively with rodless cavity, and the rod chamber of described loading cylinders is connected with the first proportional pressure valve, and the rodless cavity of described loading cylinders connects the second proportional pressure valve; Described driving oil pump, the first load oil pump are all connected with described fuel tank with the import of the second load oil pump, and the return opening of the return opening of described solenoid directional control valve, the return opening of described guide's electromagnetic relief valve, the first described proportional pressure valve is all connected with described fuel tank with the return opening of the second described proportional pressure valve; Control signal and the control system of the control end of the control end of described guide's electromagnetic relief valve, the control end of described solenoid directional control valve, described proportional velocity regulating valve, the first proportional pressure valve and the second proportional pressure valve communicate to connect.
The rod chamber hydraulic fluid port of described driving oil cylinder is provided with the second pressure transducer, and the rodless cavity hydraulic fluid port of described driving oil cylinder is provided with the first pressure transducer, and the second described pressure transducer and the first described pressure transducer and control system communicate to connect.
Described displacement transducer adopts the displacement transducer of magnetic suspension slide block type; The displacement transducer of described magnetic suspension slide block type comprises magnetic suspension slide block and sensor base, described magnetic suspension slide block is fixedly connected with described pull pressure sensor by suspended slider link, make itself and described pull pressure sensor do synchronous linear to-and-fro motion, described magnetic suspension slide block and described sensor base keep 3-5mm distance.
The rod chamber hydraulic fluid port of described loading cylinders is provided with the 3rd pressure transducer, and the rodless cavity hydraulic fluid port of described loading cylinders is provided with the 4th pressure transducer, and the 3rd described pressure transducer and the 4th described pressure transducer and control system communicate to connect.
Described solenoid directional control valve is the three-position four-way electromagnetic directional valve of " O " type Median Function.
Described guide's electromagnetic relief valve comprises guide's two-position two-way solenoid valve and relief valve, and described guide's two-position two-way solenoid valve and control system communicate to connect.
Described driving oil delivery side of pump is provided with the first pressure gauge, the rod chamber hydraulic fluid port of described driving oil cylinder is provided with the 3rd pressure gauge, the rodless cavity hydraulic fluid port of described driving oil cylinder is provided with the second pressure gauge, the rod chamber hydraulic fluid port of described loading cylinders is provided with the 4th pressure gauge, and the rodless cavity hydraulic fluid port of described loading cylinders is provided with the 5th pressure gauge.
Described driving oil delivery side of pump is provided with the first one-way valve and the first high pressure filter, the first described load oil delivery side of pump is provided with the second one-way valve and the second high pressure filter, and the second described load oil delivery side of pump is provided with the 3rd one-way valve and third high filter pressed oil device.
The return opening of the return opening of described solenoid directional control valve, the return opening of described guide's electromagnetic relief valve, the first described proportional pressure valve is connected with described fuel tank with return filter by cooler with the return opening of the second described proportional pressure valve.
The fluid flowing back to fuel tank all cools through supercooler, prevents spill losses from causing hydraulic system temperature rise excessive.
The fluid flowing back to fuel tank all filters through return filter, clean fluid.
Adopt the hydraulic system of the Double Tops cylinder structure of technique scheme, hydraulic system is divided into drive part and loading section; Drive part comprises fuel tank, drives oil pump, the first one-way valve, high pressure filter, the first pressure gauge, the second pressure gauge, the 3rd pressure gauge, guide's electromagnetic relief valve, proportional velocity regulating valve, solenoid directional control valve, the first pressure transducer, the second pressure transducer, drives oil cylinder, cooler, return filter; Loading section comprises fuel tank, the first load oil pump, the second load oil pump, the second one-way valve, the 3rd one-way valve, the second high pressure filter, third high filter pressed oil device, the 4th pressure gauge, the 5th pressure gauge, the 3rd pressure transducer, the 4th pressure transducer, loading cylinders, the first proportional pressure valve, the second proportional pressure valve, cooler, return filter.
The rod chamber of loading cylinders and rodless cavity adopt the first load oil pump and the second load oil pump independently to control respectively, and pressure and the flow in two chambeies do not interfere with each other, and make the adjustment of two cavity pressures and flow more flexibly, reliably.
Displacement transducer adopts the displacement transducer of magnetic suspension slide block type; Magnetic suspension slide block is fixedly connected with pull pressure sensor by suspended slider link, itself and pull pressure sensor is made to do synchronous linear to-and-fro motion, magnetic suspension slide block and sensor base keep 3-5mm distance, produced by magnetic induction and export electrical signal, thus measure the real-time displacement value of Double Tops cylinder piston rod; By the shift value that displacement transducer records, the control signal of proportional velocity regulating valve can be regulated further, realize, to the closed loop control of piston rod displacement, meeting control overflow.
Double Tops cylinder structure is set as all the time by the action of driving oil cylinder pushing loading cylinders.
Pull pressure sensor both can survey the pressure between two cylinder piston rods, was again the link of Double Tops cylinder structure two-piston bar.
The load force of hydraulic system is regulated by loading section; The pressure p of the rod chamber of loading cylinders
1set up by the first proportional pressure valve, the pressure p of loading cylinders rodless cavity
2set up by the second proportional pressure valve; The piston area of the rod chamber of loading cylinders is A
1, the piston area of the rodless cavity of loading cylinders is A
2, when Double Tops cylinder piston rod is made uniform motion or be static, this hydraulic system load force F is by formula F=p
2a
2-p
1a
1calculate, by setting the control signal of the first proportional pressure valve and the second proportional pressure valve, the arbitrary load force value within the scope of system maximum load power can be obtained, realizing the stepless adjustable of load force.
In above-mentioned hydraulic system, the motion speed of Double Tops cylinder piston rod is regulated by drive part; The movement velocity of Double Tops cylinder piston rod determines by entering the fluid flow driving oil cylinder, and its flow passing ratio series flow control valve is set up.
Drive the rodless cavity hydraulic fluid port of oil cylinder to be provided with the first pressure transducer, the first pressure transducer can detect the oil pressure driven in oil cylinder rodless cavity in real time; Drive the rod chamber hydraulic fluid port of oil cylinder to be provided with the second pressure transducer, the second pressure transducer can detect the oil pressure driven in cylinder rod chamber in real time; The rod chamber hydraulic fluid port of loading cylinders is provided with the 3rd pressure transducer, and described 3rd pressure transducer can detect the oil pressure in the rod chamber of loading cylinders in real time; The rodless cavity hydraulic fluid port of loading cylinders is provided with the 4th pressure transducer, and described 4th pressure transducer can detect the oil pressure in the rodless cavity of loading cylinders in real time; By the oil pressure that the 3rd pressure transducer and the 4th pressure transducer record, the control signal of the first proportional pressure valve and the second proportional pressure valve can be regulated further, realize, to the closed loop control of load force, meeting control overflow.
First pressure gauge, the second pressure gauge, the 3rd pressure gauge, the 4th pressure gauge and the 5th pressure gauge are used for the real-time display of detected pressure value.
The fluid of oil pump, the first load oil pump and the second load fuel pump outlet is driven to filter respectively through the first high pressure filter, the second high pressure filter and third high filter pressed oil device, clean fluid, prevents the impurity in fluid from causing damage to components and parts such as the Proportional valves in hydraulic system.
Oil pump, the first load oil pump and the second load oil pump is driven to be metering pumps, or variable displacement pump.
Guide's electromagnetic relief valve is guide's electromagnetic relief valve, or proportional pressure valve.
The present invention at least has following advantages:
Passing ratio pressure valve of the present invention and proportional velocity regulating valve control load power size and displacement amount respectively, the process of the stressed extrusion-deformation of energy accurate simulation extrded material, and this load mode has stepless adjustable, can active and passively load, can load by tension compression bidirectional, can the step response of realizable force, build the features such as the pressure time is short, make to need for experimental system provide the various experimental researcies of load force can convenient, accurate, carry out reliably.
In sum, the hydraulic system of a kind of Double Tops cylinder structure that the present invention proposes, passing ratio pressure valve and proportional velocity regulating valve control load power size and displacement amount respectively, this load mode has stepless adjustable, can active and passively load, can load by tension compression bidirectional, can the step response of realizable force, build the features such as the pressure time is short.The present invention can be widely used in as experimental research provides load force, the simulation industry spot extruding force process loaded flexibly, provides a kind of solution feasible flexibly for needing the experimental system producing load force.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Embodiment
For further setting forth the present invention for the technological means reaching predetermined goal of the invention and take and effect, below in conjunction with accompanying drawing and preferred embodiment, to the embodiment proposed according to the present invention, structure, feature and effect thereof, be described in detail as follows.
See Fig. 1, the load mode of Double Tops cylinder structure and hydraulic system thereof, comprise fuel tank 1, oil cylinder 10 and loading cylinders 15 centering is driven to be arranged on fixed support 11, drive the piston rod of oil cylinder 10 and the piston rod of loading cylinders 15 to be fixedly connected to form Double Tops cylinder structure with pull pressure sensor 12 both ends of the surface respectively, also comprise the displacement transducer 14 that measures the real-time displacement value of the piston rod of Double Tops cylinder structure; Comprise a solenoid directional control valve 8, solenoid directional control valve 8 is three-position four-way electromagnetic directional valve, solenoid directional control valve 8 is provided with left electromagnet 8-1 and right electromagnet 8-2, the electrical condition that corresponding two electromagnet are different, and solenoid directional control valve 8 can be in different working position, three, left, center, right.The outlet of oil pump 2-1 is driven to be connected with the import of proportional velocity regulating valve 7, the outlet of proportional velocity regulating valve 7 is connected with an import of solenoid directional control valve 8, two outlets of solenoid directional control valve 8 are connected with the rod chamber and rodless cavity that drive oil cylinder 10 respectively, drive the outlet of oil pump 2-1 to be also connected with guide's electromagnetic relief valve 6; The rod chamber of loading cylinders 15 is connected with the first load oil pump 2-2 and the second load oil pump 2-3 respectively with rodless cavity, and the rod chamber of loading cylinders 15 is connected with the first proportional pressure valve 16-1, and the rodless cavity of loading cylinders 15 connects the second proportional pressure valve 16-2; Driving oil pump 2-1, the first load oil pump 2-2 are all connected with fuel tank 1 with the import of the second load oil pump 2-3, and the return opening of the return opening of solenoid directional control valve 8, the return opening of guide's electromagnetic relief valve 6, the first proportional pressure valve 16-1 is all connected with fuel tank 1 with the return opening of the second proportional pressure valve 16-2; The control end of the control end of guide's electromagnetic relief valve 6, the control end of solenoid directional control valve 8, proportional velocity regulating valve 7, the control signal of the first proportional pressure valve 16-1 and the second proportional pressure valve 16-2 and control system communicate to connect.
Preferably, drive the rod chamber hydraulic fluid port of oil cylinder 10 to be provided with the second pressure transducer 9-2, drive the rodless cavity hydraulic fluid port of oil cylinder 10 to be provided with the first pressure transducer 9-1, the second pressure transducer 9-2 and the first pressure transducer 9-1 and control system communicate to connect; The rod chamber hydraulic fluid port of loading cylinders 15 is provided with the 3rd pressure transducer 9-3, and the rodless cavity hydraulic fluid port of loading cylinders 15 is provided with the 4th pressure transducer 9-4, and the 3rd pressure transducer 9-3 and the 4th pressure transducer 9-4 and control system communicate to connect.
Preferably, displacement transducer 14 adopts the displacement transducer of magnetic suspension slide block type; The displacement transducer of magnetic suspension slide block type comprises magnetic suspension slide block 14-1 and sensor base 14-2, magnetic suspension slide block 14-1 is fixedly connected with pull pressure sensor 12 by suspended slider link 13, make itself and pull pressure sensor 12 do synchronous linear to-and-fro motion, magnetic suspension slide block 14-1 and sensor base 14-2 keeps 3-5mm distance.
Preferably, solenoid directional control valve 8 is the three-position four-way electromagnetic directional valve of " O " type Median Function.
Particularly, guide's electromagnetic relief valve 6 comprises guide's two-position two-way solenoid valve 6-1 and relief valve 6-2, and guide's two-position two-way solenoid valve 6-1 and control system communicate to connect.
Further, drive the outlet of oil pump 2-1 that the first pressure gauge 5-1 is installed, drive the rod chamber hydraulic fluid port of oil cylinder 10 that the 3rd pressure gauge 5-3 is installed, drive the rodless cavity hydraulic fluid port of oil cylinder 10 that second pressure gauge 5-2 is installed, the rod chamber hydraulic fluid port of loading cylinders 15 is provided with the 4th pressure gauge 5-4, and the rodless cavity hydraulic fluid port of loading cylinders 15 is provided with the 5th pressure gauge 5-5.
Further, drive the outlet of oil pump 2-1 that the first one-way valve 3-1 and the first high pressure filter 4-1 is installed, the outlet of the first load oil pump 2-2 is provided with the second one-way valve 3-2 and the second high pressure filter 4-2, and the outlet of the second load oil pump 2-3 is provided with the 3rd one-way valve 3-3 and third high filter pressed oil device 4-3.
Further, the return opening of solenoid directional control valve 8, the return opening of guide's electromagnetic relief valve 6, the return opening of the first proportional pressure valve 16-1 are connected with fuel tank 1 with return filter 18 by cooler 17 with the return opening of the second proportional pressure valve 16-2.
The specific embodiment of the present invention is provided in detail by following examples and accompanying drawing thereof.
As shown in Figure 1, hydraulic system is divided into drive part (in Fig. 1 on the left of dotted line) and loading section (in Fig. 1 on the right side of dotted line); Drive part comprises fuel tank 1, driving oil pump 2-1, the first one-way valve 3-1, the first high pressure filter 4-1, the first pressure gauge 5-1, the second pressure gauge 5-2, the 3rd pressure gauge 5-3, guide's electromagnetic relief valve 6, proportional velocity regulating valve 7, solenoid directional control valve 8, first pressure transducer 9-1, the second pressure transducer 9-2, drives oil cylinder 10, cooler 17, return filter 18; Loading section comprises fuel tank 1, first load oil pump 2-2, the second load oil pump 2-3, the second one-way valve 3-2, the 3rd one-way valve 3-3, the second high pressure filter 4-2, third high filter pressed oil device 4-3, the 4th pressure gauge 5-4, the 5th pressure gauge 5-5, the 3rd pressure transducer 9-3, the 4th pressure transducer 9-4, loading cylinders 15, first proportional pressure valve 16-1, the second proportional pressure valve 16-2, cooler 17, return filter 18.
When two cylinder piston rods move right, drive part in-line is: drive oil pump 2-1 from fuel tank 1 oil suction, and fluid has the rodless cavity extremely driving oil cylinder 10 successively through the first one-way valve 3-1, the first high pressure filter 4-1, proportional velocity regulating valve 7, the left position of solenoid directional control valve 8; Drive part oil circuit is: the fluid driving the rod chamber of oil cylinder 10, successively through the left position of solenoid directional control valve 8, cooler 17, return oil filter 18 to fuel tank 1; Oil pump 2-1 is driven to export unnecessary fluid through pilot solenoid valve 6, cooler 17, return filter 18 overflow to fuel tank 1; Loading section in-line is: the first load oil pump 2-2 is from fuel tank 1 oil suction, and fluid carries out repairing through the second one-way valve 3-2, the second high pressure filter 4-2 to the rod chamber of load oil pump 15 successively; First load oil pump 2-2 exports unnecessary fluid through the first proportional pressure valve 16-1, cooler 17, return filter 18 overflow to fuel tank 1; Loading section oil circuit is: the fluid of the rodless cavity of loading cylinders 15, successively through the second proportional pressure valve 16-2 cooler 17, return oil filter 18 to fuel tank 1.
When two cylinder piston rods are to left movement, drive part in-line is: drive oil pump 2-1 from fuel tank 1 oil suction, and fluid extremely drives the rod chamber of oil cylinder 10 successively through the first one-way valve 3-1, the first high pressure filter 4-1, proportional velocity regulating valve 7, the right position of solenoid directional control valve 8; Drive part oil circuit is: the fluid driving the rodless cavity of oil cylinder 10, successively through the right position of solenoid directional control valve 8, cooler 17, return oil filter 18 to fuel tank 1; Oil pump 2-1 is driven to export unnecessary fluid through pilot solenoid valve 6, cooler 17, return filter 18 overflow to fuel tank 1; Loading section in-line is: the second load oil pump 2-3 is from fuel tank 1 oil suction, and fluid carries out repairing through the 3rd one-way valve 3-3, third high filter pressed oil device 4-3 to the rodless cavity of load oil pump 15 successively; Second load oil pump 2-3 exports unnecessary fluid through the second proportional pressure valve 16-2, cooler 17, return filter 18 overflow to fuel tank 1; Loading section oil circuit is: the fluid of the rod chamber of loading cylinders 15, successively through the first proportional pressure valve 16-1, cooler 17, return oil filter 18 to fuel tank 1.
Drive oil cylinder 10 and loading cylinders 15 to be arranged on fixed support 11, adjustment maintenance two oil cylinder centering, makes two cylinder piston rods be connected and fixed with pull pressure sensor 12 both ends of the surface internal thread respectively, forms Double Tops cylinder structure.
The rod chamber of loading cylinders 15 and rodless cavity adopt the first load oil pump 2-2 and the second load oil pump 2-3 independently to control respectively, and pressure and the flow in two chambeies do not interfere with each other, and make the adjustment of two cavity pressures and flow more flexibly, reliably.
Above-mentioned Double Tops cylinder structure is set as promoting loading cylinders 15 action by driving oil cylinder 10 all the time.
Said system comprises pull pressure sensor 12, and described pull pressure sensor 12 both can survey the pressure between two cylinder piston rods, is again the link of Double Tops cylinder structure two-piston bar.
The load force of above-mentioned hydraulic system is regulated by loading section; The pressure p of the rod chamber of loading cylinders 15
1set up by the first proportional pressure valve 16-1, the pressure p of the rodless cavity of loading cylinders 15
2set up by the second proportional pressure valve 16-2; The piston area of the rod chamber of loading cylinders 15 is A
1, the piston area of the rodless cavity of loading cylinders 15 is A
2, when Double Tops cylinder piston rod is made uniform motion or be static, this hydraulic system load force F is by formula F=p
2a
2-p
1a
1calculate, by setting the control signal of the first proportional pressure valve 16-1 and the second proportional pressure valve 16-2, the arbitrary load force value within the scope of system maximum load power can be obtained, realizing the stepless adjustable of load force.
In above-mentioned hydraulic system, the motion speed of Double Tops cylinder piston cylinder is regulated by drive part; The movement velocity of Double Tops cylinder piston rod determines by entering the fluid flow driving oil cylinder, and its flow passing ratio series flow control valve 7 is set up.
Above-mentioned guide's two-position two-way solenoid valve 6-1 electromagnet obtains electric, and the oil pressure relief of guide's electromagnetic relief valve 6 is 0, starts and drives oil pump 2-1 to be No Load Start; The input signal controlling the first proportional pressure valve 16-1 is 0, starts the first load oil pump 2-2 and is No Load Start; The input signal controlling the second proportional pressure valve 16-2 is 0, starts the second load oil pump 2-3 and is No Load Start.
No Load Start drives oil pump 2-1, solenoid directional control valve 8 is made to be in meta, guide's two-position two-way solenoid valve 6-1 electromagnet dead electricity, the pressure of manual tune relief valve 6-2 is a fixed value, drives oil pump 2-1 to export oil liquid pressure and to reach after setting value by guide's electromagnetic relief valve 6 overflow to fuel tank 1; No Load Start second load oil pump 2-3, setting the second proportional pressure valve 16-2 control inputs signal is a fixed value, and the pressure of the rodless cavity of loading cylinders 15 is a certain fixed value; No Load Start first load oil pump 2-2, setting the first proportional pressure valve 16-1 control inputs signal is 0, carries out repairing to the rod chamber of loading cylinders 15; The left electromagnet 8-1 of solenoid directional control valve 8 is energized, and solenoid directional control valve 8 is in left position working state, drives oil pump 2-1 to export fluid and enters the rodless cavity driving oil pump 10, namely realize the loading of active pressure.
No Load Start drives oil pump 2-1, solenoid directional control valve 8 is made to be in meta, guide's two-position two-way solenoid valve 6-1 electromagnet dead electricity, the pressure of manual tune relief valve 6-2 is a fixed value, drives oil pump 2-1 to export oil liquid pressure and to reach after setting value by guide's electromagnetic relief valve 6 overflow to fuel tank 1; No Load Start first load oil pump 2-2, setting the first proportional pressure valve 16-1 control inputs signal is a fixed value, and the pressure of the rod chamber of loading cylinders 15 is a certain fixed value; No Load Start second load oil pump 2-3, setting the second proportional pressure valve 16-2 control inputs signal is 0, carries out repairing to the rodless cavity of loading cylinders 15; The left electromagnet 8-2 of solenoid directional control valve 8 is energized, and solenoid directional control valve 8 is in right position working state, drives oil pump 2-1 to export fluid and enters the rod chamber driving oil pump 10, namely realize the loading of initiatively pulling force.
No Load Start drives oil pump 2-1, solenoid directional control valve 8 is made to be in meta, guide's two-position two-way solenoid valve 6-1 electromagnet dead electricity, the pressure of manual tune relief valve 6-2 is a fixed value, drives oil pump 2-1 to export oil liquid pressure and to reach after setting value by guide's electromagnetic relief valve 6 overflow to fuel tank 1; Second load oil pump 2-3 does not start, and setting the second proportional pressure valve 16-2 control inputs signal is a fixed value; No Load Start first load oil pump 2-2, setting the first proportional pressure valve 16-1 control inputs signal is 0, carries out repairing to the rod chamber of loading cylinders 15; The left electromagnet 8-1 of solenoid directional control valve 8 is energized, and solenoid directional control valve 8 is in left position working state, drives oil pump 2-1 to export fluid and enters the rodless cavity driving oil pump 10, namely realize the loading of passive resistance.
No Load Start drives oil pump 2-1, solenoid directional control valve 8 is made to be in meta, guide's two-position two-way solenoid valve 6-1 electromagnet dead electricity, the pressure of manual tune relief valve 6-2 is a fixed value, drives oil pump 2-1 to export oil liquid pressure and to reach after setting value by guide's electromagnetic relief valve 6 overflow to fuel tank 1; First load oil pump 2-2 does not start, and setting the first proportional pressure valve 16-1 control inputs signal is a fixed value; No Load Start second load oil pump 2-3, setting the second proportional pressure valve 16-2 control inputs signal is 0, carries out repairing to the rodless cavity of loading cylinders 15; The left electromagnet 8-2 of solenoid directional control valve 8 is energized, and solenoid directional control valve 8 is in right position working state, drives oil pump 2-1 to export fluid and enters the rod chamber driving oil pump 10, namely realize the loading of passive pulling force.
Drive the rodless cavity hydraulic fluid port of oil cylinder 10 to be provided with the first pressure transducer 9-1, the first pressure transducer 9-1 can detect the oil pressure in the rodless cavity driving oil cylinder 10 in real time; Drive the rod chamber hydraulic fluid port of oil cylinder 10 to be provided with the second pressure transducer 9-2, the second pressure transducer 9-2 can detect the oil pressure in the rod chamber driving oil cylinder 10 in real time; The rod chamber hydraulic fluid port of loading cylinders 15 is provided with the 3rd pressure transducer 9-3, and the 3rd pressure transducer 9-3 can detect the oil pressure in loading cylinders 15 rod chamber in real time; The rodless cavity hydraulic fluid port of loading cylinders 15 is provided with the 4th pressure transducer 9-4, and the 4th pressure transducer 9-4 can detect the oil pressure in the rodless cavity of loading cylinders 15 in real time; By the oil pressure that the 3rd pressure transducer 9-3 and the 4th pressure transducer 9-4 record, the control signal of the first proportional pressure valve 16-1 and the second proportional pressure valve 16-2 can be regulated further, realize, to the closed loop control of load force, meeting control overflow.
The fluid that above-mentioned driving oil pump 2-1, the first load oil pump 2-2 and the second load oil pump 2-3 export filters respectively through the first high pressure filter 4-1, the second high pressure filter 4-2 and third high filter pressed oil device 4-3, clean fluid, prevents the impurity in fluid from causing damage to components and parts such as the Proportional valves in hydraulic system.
The fluid flowing back to fuel tank all cools through supercooler 17, prevents spill losses from causing hydraulic system temperature rise excessive.
The fluid flowing back to fuel tank all filters through return filter 18, clean fluid.
Driving oil pump 2-1, the first load oil pump 2-2 and the second load oil pump 2-3 can be metering pumps, also can be variable displacement pumps.
By rational design, the load mode of Double Tops cylinder structure provided by the invention and hydraulic system thereof can provide for experimental research load force, the simulation industry spot extruding force process loaded flexibly, this load mode has stepless adjustable, can active and passively load, can load by tension compression bidirectional, can the step response of realizable force, build the features such as the pressure time is short.
The above, only embodiment of accompanying each other of the present invention, not any pro forma restriction is done to the present invention, although the present invention discloses as above with preferred embodiment, but and be not used to limit the present invention, any technician being familiar with this specialty, do not departing within the scope of technical solution of the present invention, make a little change when the technology contents of above-mentioned announcement can be utilized or be modified to the equivalent example of equivalent variations, in every case be the content not departing from technical solution of the present invention, according to technical spirit of the present invention to any simple modification made for any of the above embodiments, equivalent variations and modification, all still belong in the scope of technical solution of the present invention.
Claims (9)
1. the hydraulic system of a Double Tops cylinder structure, comprise fuel tank (1), it is characterized in that: drive oil cylinder (10) and loading cylinders (15) centering to be arranged on fixed support (11), the piston rod of described driving oil cylinder (10) and the piston rod of described loading cylinders (15) are fixedly connected to form Double Tops cylinder structure with pull pressure sensor (12) both ends of the surface respectively, also comprise the displacement transducer (14) of the real-time displacement value of the piston rod of the Double Tops cylinder structure described in a mensuration; Comprise a solenoid directional control valve (8), described solenoid directional control valve (8) is three-position four-way electromagnetic directional valve, the outlet of oil pump (2-1) is driven to be connected with the import of proportional velocity regulating valve (7), the outlet of described proportional velocity regulating valve (7) is connected with an import of described solenoid directional control valve (8), two of described solenoid directional control valve (8) outlets are connected with the rod chamber of described driving oil cylinder (10) and rodless cavity respectively, and the outlet of described driving oil pump (2-1) is also connected with guide's electromagnetic relief valve (6); The rod chamber of described loading cylinders (15) is connected with the first load oil pump (2-2) and the second load oil pump (2-3) respectively with rodless cavity, the rod chamber of described loading cylinders (15) is connected with the first proportional pressure valve (16-1), and the rodless cavity of described loading cylinders (15) connects the second proportional pressure valve (16-2); Described driving oil pump (2-1), the first load oil pump (2-2) are all connected with described fuel tank (1) with the import of the second load oil pump (2-3), and the return opening of described solenoid directional control valve (8), the return opening of described guide's electromagnetic relief valve (6), the return opening of described the first proportional pressure valve (16-1) are all connected with described fuel tank (1) with the return opening of described the second proportional pressure valve (16-2); Control signal and the control system of the control end of the control end of described guide's electromagnetic relief valve (6), the control end of described solenoid directional control valve (8), described proportional velocity regulating valve (7), the first proportional pressure valve (16-1) and the second proportional pressure valve (16-2) communicate to connect.
2. the hydraulic system of Double Tops cylinder structure according to claim 1, it is characterized in that: the rod chamber hydraulic fluid port of described loading cylinders (15) is provided with the 3rd pressure transducer (9-3), the rodless cavity hydraulic fluid port of described loading cylinders (15) is provided with the 4th pressure transducer (9-4), and the 3rd described pressure transducer (9-3) and the 4th described pressure transducer (9-4) communicate to connect with control system; By the oil pressure that the 3rd pressure transducer (9-3) and the 4th pressure transducer (9-4) record, the control signal of further adjustment first proportional pressure valve (16-1) and the second proportional pressure valve (16-2), realize the closed loop control to load force, meet control overflow.
3. the hydraulic system of Double Tops cylinder structure according to claim 1 and 2, is characterized in that: described displacement transducer (14) adopts the displacement transducer of magnetic suspension slide block type; The displacement transducer of described magnetic suspension slide block type comprises magnetic suspension slide block (14-1) and sensor base (14-2), described magnetic suspension slide block (14-1) is fixedly connected with described pull pressure sensor (12) by suspended slider link (13), make itself and described pull pressure sensor (12) do synchronous linear to-and-fro motion, described magnetic suspension slide block (14-1) and described sensor base (14-2) keep 3-5mm distance; By the shift value that displacement transducer (14) records, regulate the control signal of proportional velocity regulating valve (7) further, realize, to the closed loop control of piston rod displacement, meeting control overflow.
4. the hydraulic system of Double Tops cylinder structure according to claim 1 and 2, it is characterized in that: the rod chamber hydraulic fluid port of described driving oil cylinder (10) is provided with the second pressure transducer (9-2), the rodless cavity hydraulic fluid port of described driving oil cylinder (10) is provided with the first pressure transducer (9-1), and described the second pressure transducer (9-2) and described the first pressure transducer (9-1) communicate to connect with control system.
5. the hydraulic system of Double Tops cylinder structure according to claim 1 and 2, is characterized in that: described solenoid directional control valve (8) is the three-position four-way electromagnetic directional valve of " O " type Median Function.
6. the hydraulic system of Double Tops cylinder structure according to claim 1 and 2, it is characterized in that: described guide's electromagnetic relief valve (6) comprises guide's two-position two-way solenoid valve (6-1) and relief valve (6-2), described guide's two-position two-way solenoid valve (6-1) and control system communicate to connect.
7. the hydraulic system of Double Tops cylinder structure according to claim 1 and 2, it is characterized in that: the outlet of described driving oil pump (2-1) is provided with the first pressure gauge (5-1), the rod chamber hydraulic fluid port of described driving oil cylinder (10) is provided with the 3rd pressure gauge (5-3), the rodless cavity hydraulic fluid port of described driving oil cylinder (10) is provided with the second pressure gauge (5-2), the rod chamber hydraulic fluid port of described loading cylinders (15) is provided with the 4th pressure gauge (5-4), the rodless cavity hydraulic fluid port of described loading cylinders (15) is provided with the 5th pressure gauge (5-5).
8. the hydraulic system of Double Tops cylinder structure according to claim 1 and 2, it is characterized in that: the outlet of described driving oil pump (2-1) is provided with the first one-way valve (3-1) and the first high pressure filter (4-1), the outlet of the first described load oil pump (2-2) is provided with the second one-way valve (3-2) and the second high pressure filter (4-2), and the outlet of the second described load oil pump (2-3) is provided with the 3rd one-way valve (3-3) and third high filter pressed oil device (4-3).
9. the hydraulic system of Double Tops cylinder structure according to claim 1 and 2, is characterized in that: the return opening of the return opening of described solenoid directional control valve (8), the return opening of described guide's electromagnetic relief valve (6), described the first proportional pressure valve (16-1) is connected with described fuel tank (1) with return filter (18) by cooler (17) with the return opening of described the second proportional pressure valve (16-2).
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