CN205025865U - Servo loading system of large -scale multi -functional ground structural model test platform multiple spot - Google Patents
Servo loading system of large -scale multi -functional ground structural model test platform multiple spot Download PDFInfo
- Publication number
- CN205025865U CN205025865U CN201520771073.0U CN201520771073U CN205025865U CN 205025865 U CN205025865 U CN 205025865U CN 201520771073 U CN201520771073 U CN 201520771073U CN 205025865 U CN205025865 U CN 205025865U
- Authority
- CN
- China
- Prior art keywords
- pressure
- way
- valve
- oil
- group
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn - After Issue
Links
- 238000011068 loading method Methods 0.000 title claims abstract description 56
- 238000012360 testing method Methods 0.000 title claims abstract description 29
- 239000003921 oil Substances 0.000 claims description 128
- 238000005086 pumping Methods 0.000 claims description 52
- 230000009467 reduction Effects 0.000 claims description 17
- 239000002828 fuel tank Substances 0.000 claims description 13
- 239000010720 hydraulic oil Substances 0.000 claims description 13
- 238000005070 sampling Methods 0.000 claims description 12
- 238000006073 displacement reaction Methods 0.000 claims description 8
- 239000013589 supplement Substances 0.000 claims description 8
- 238000004891 communication Methods 0.000 claims description 6
- 230000011664 signaling Effects 0.000 claims description 6
- 238000012544 monitoring process Methods 0.000 claims description 4
- 238000009434 installation Methods 0.000 claims description 3
- 238000004088 simulation Methods 0.000 abstract description 15
- 230000007774 longterm Effects 0.000 abstract description 5
- 238000011160 research Methods 0.000 abstract description 5
- 238000000034 method Methods 0.000 description 22
- 238000002474 experimental method Methods 0.000 description 15
- 230000001276 controlling effect Effects 0.000 description 9
- 238000010586 diagram Methods 0.000 description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
- 230000008569 process Effects 0.000 description 8
- 239000011435 rock Substances 0.000 description 7
- 238000013461 design Methods 0.000 description 6
- 239000012530 fluid Substances 0.000 description 5
- 239000007788 liquid Substances 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- 230000008878 coupling Effects 0.000 description 4
- 238000010168 coupling process Methods 0.000 description 4
- 238000005859 coupling reaction Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000000446 fuel Substances 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- 230000001105 regulatory effect Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 230000006837 decompression Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000004377 microelectronic Methods 0.000 description 3
- 238000011144 upstream manufacturing Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000002153 concerted effect Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 230000002452 interceptive effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009530 blood pressure measurement Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 239000010727 cylinder oil Substances 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000010773 plant oil Substances 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000007619 statistical method Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000003325 tomography Methods 0.000 description 1
Landscapes
- Fluid-Pressure Circuits (AREA)
Abstract
The utility model relates to a servo loading system of large -scale multi -functional ground structural model test platform multiple spot, technical field is applyed to the outside load that belongs to simulation ground structural engineering, this system includes: the hydraulic system who constitutes by 15 group double -acting cylinder, loading power supplies, 15 tunnel multichannel separators to and servo control system, wherein, the loading power supply passes through the multichannel separator and links to each other with double -acting cylinder, and servo control system links to each other with loading power supply and multichannel separator respectively, every double -acting cylinder of group comprises the same a plurality of double -acting cylinder that exert oneself, every double -acting cylinder of group corresponds a multichannel separator, and every double -acting cylinder of group constitutes a passageway, and the double -acting cylinder of across block and inter block independently arranges for parallel. This system can satisfy in actual scientific research, the engineering protects the active demand of carrying a steady voltage function, accuracy and applying the servo loading system of automatic ground structural model test of long -term load to having.
Description
Technical field
The external loads that the utility model belongs to simulation geotechnical structure engineering applies technical field; In particular to large-sized multifunction geotechnical structure model test platform multiple spot servo loading system.
Background technique
In rock engineering, physical experiments existing model engineering practical structures stress deformation feature, again can the complicated geological defect such as tomography, disturbed belt of approximate simulation rock mass inside on the impact of engineering stability, overcome discontinuous, non-linear, a heterogeneous body difficult problem that numerical simulation is difficult to go beyond, therefore it has extremely important effect and is widely used in the engineerings such as water conservancy, mining, tunnel, and the big-and-middle-sized arch dam of such as China substantially all did physical experiments.
In the physical experiments of rock engineering, the external load how accurate simulation structure is subject to is the difficult point of physical experiments always, this is directly connected to the accuracy of model test simulation, traditional model test simply uses multiple jack to simulate the applying process of external load, apply water ballast(ing) in induced joint model test upstream dam facing, this situation is described below.
Dam facing water ballast(ing) is the area load of Triangle-Profile, the dam facing water ballast(ing) analogy method that domestic and international scientific research institution generally adopts is that upstream dam facing is divided into tens of pieces of regions, water ballast(ing) size, the center of loading in every block region is calculated according to the water depth simulation, dam facing face power active area etc. in region, every block region uses a jack Simulated Water load, the water ballast(ing) action center in region is the action center of jack, and the water ballast(ing) of simulation is made a concerted effort for the effect of jack is made a concerted effort; In test, jack and upstream dam facing are tried one's best close contact, jack is divided into 5-7 group to go out force value according to the difference of size of exerting oneself is approximate, often organize jack to be all connected with corresponding multichannel oil separator, monitor multichannel oil separator internal oil pressure with precision pressure gauge, control the increase of oil pressure manually or automatically or reduce with the load of exerting oneself controlling jack.To sum up, it is coarse that tradition both domestic and external applies area load Measures compare, can not the actual load situation that is subject to of monitors physical model realize servo loading in real time; And due to the effect of pipe friction etc., actual the exerting oneself of jack is generally less than design load.Simultaneously, the simulation of rock-soil material stream change in recent years plays further important role in rock engineering, have need for a long time (1-3 month) more future and be continuously applied the physical experiments of steady load with simulation rock engineering long-time running stability, and the situation that load is lax may be there is when being carried in long-time load application in traditional jack, these govern the development of rock engineering physical experiments all to a certain extent, can not meet Practical Project and scientific research active demand.To sum up, in Practical Project and scientific research to develop a kind of have to protect carry a voltage stabilizing function, accurately the large-sized multifunction geotechnical structure model test platform multiple spot servo loading system of load application and have urgent demand.
Model utility content
The purpose of this utility model is the defect existed for overcoming traditional loading method, propose a kind of large-sized multifunction geotechnical structure model test platform multiple spot servo loading system, native system can meet in actual scientific research, engineering having the active demand protected and carry voltage stabilizing function, accurately apply the automation geotechnical structure model test servo loading system of long term loading.
A kind of large-sized multifunction geotechnical structure model test platform multiple spot servo loading system of the present utility model, it is characterized in that, this system comprises: the hydraulic system be made up of 15 groups of two-way cylinders, loading power source, 15 tunnel multichannel oil separators, and servo-control system, wherein, load power source to be connected with two-way cylinder by multichannel oil separator, servo-control system is connected with multichannel oil separator with loading power source respectively; Often organize two-way cylinder to be made up of identical multiple two-way cylinders of exerting oneself; Often organizing the corresponding road multichannel oil separator of two-way cylinder, often organize two-way cylinder and form a passage, is independent layout that walk abreast with the two-way cylinder in group between group.
The feature of the utility model system and beneficial effect:
Native system has multipoint excitation (having at most 106 load(ing) points) in load application process, loading procedure is controlled in real time, and long-term lasting loading is stablized, and loads the feature that change is rapid, precision is high, significantly can reduce the manpower and materials consumption in model test, improve the validity of experiment:
(1) native system is made up of (can further expand) 106 two-way cylinders, by control program to each two-way cylinder exert oneself/displacement controls automatically, excursion of exerting oneself is larger; Be furnished with oil cylinder wall friction and eliminate function, make the precision of loading force higher, error is less than 1%.
(2) native system has good interactive operation interface, realizes experiment overall process and automatically controls, the error or error avoiding manual loading to operate causing, and can carry out secondary development to interactive operation interface.
(3) native system adopts two-way cylinder, and every group oil cylinder can realize loading, unloading servocontrol, and considers the impact that casing wall frictional force exerts oneself on actual loading, makes actual loading value more accurate.
(4) native system adopts the measures such as two-way constant voltage pumping plant to ensure device energy conservation environmental protection, and working procedure noise is less.
(5) native system continuous working period is long, can ensure that load applies more than 3 months (in experimentation, pressure loss amplitude peak is less than 1%) continually and steadily, facilitates the long-term stable experiment of geotechnical structure model to use.
(6) each loading passage of native system can work alone, and each interchannel also can by set model collaborative work.
(7) native system has good safety protection device and oil hydraulic pump cooling system, and the impact on process of the test under effectively can reducing power failure suddenly or automatically controlling the fortuitous events such as inefficacy.
Native system is not confined to the model test field of rock engineering, and can need to use in the physical experiments of applying area load at Aero-Space, building, machinery etc.Be specially adapted to the rheological test needing in physical model experiment to apply load steady in a long-term.
Accompanying drawing illustrates:
Fig. 1 is the utility model overall system composition schematic diagram;
Fig. 2 is the hydraulic system connection diagram of the utility model system;
Fig. 3 is the multichannel oil distributor structure schematic diagram of the utility model system;
Fig. 4 is the utility model servo-control system connection diagram;
Fig. 5 is the annexation block diagram of the pumping plant control box of the utility model system;
Fig. 6 is the workflow schematic diagram of the pumping plant control box of the utility model system;
Fig. 7 is the annexation block diagram of the oil circuit control box of the utility model system;
Fig. 8 is the workflow block diagram of the oil circuit control box of the utility model system.
Embodiment
The large-sized multifunction geotechnical structure model test platform multiple spot servo loading system that the utility model proposes by reference to the accompanying drawings and embodiment describe in detail:
Native system comprises the hydraulic system be made up of two-way cylinder, loading power source, multichannel oil separator, and servo-control system.As shown in Figure 1, wherein, load power source and be connected with two-way cylinder by multichannel oil separator, servo-control system is connected with multichannel oil separator with loading power source respectively.
Embodiment's composition of each part mentioned above of native system and function are described in detail as follows:
1, hydraulic system by loading power source, 15 groups of two-way cylinders, 15 groups of multichannel oil separators form, often organize two-way cylinder and be made up of identical multiple two-way cylinders of exerting oneself; Often organize the corresponding one group of multichannel oil separator of two-way cylinder, as shown in Figure 2, the annexation of each several part is: load power source and connected with each group of multichannel oil separator by multiplexer channel, a multichannel oil separator is connected with all two-way cylinders of this group; Be in parallel between each group of multichannel oil separator, it is in parallel for often organizing between all two-way cylinders corresponding to multichannel oil separator.
The each constituent element composition of hydraulic system is described in detail as follows:
1.1, two-way cylinder:
Native system selects two-way cylinder to meet the usage requirement of automatic compression and decompression.System total has 106 two-way cylinders; Each two-way cylinder divides 15 groups, often organizes two-way cylinder and forms a passage, i.e. 15 passages.Independently arrange for parallel with the two-way cylinder in group between group.
With external displacement transducer in each two-way cylinder; External displacement transducer is electronic ruler (niiko) brand, KTC-550 model.An electrohydraulic control is installed altogether to control all two-way cylinders in group with the two-way cylinder in group; The D633R16KD1M1VSS2 model that electrohydraulic control adopts U.S. MOOG company to produce, rated flow 63L/min, working pressure 20MPa, this electrohydraulic control adopts direct drive type electro liquid servo techniques, is used for controlling the unlatching of liquid stream, stopping and direction.Servo-control system receives Displacement Feedback result by external displacement transducer, and then controls the displacement of two-way cylinder by controlling electrohydraulic control.While completing dead load loading, also can by external displacement transducer and electrohydraulic control acting in conjunction simulation vibrations load.
Two-way cylinder stroke is between 200mm ~ 300mm, and concrete two-way cylinder characteristic and quantity are in table 1.According to the cylinder diameter of exert oneself requirement and the standard of two-way cylinder, oil pressure when calculating loading by formula P=F/S (P, F, S are respectively oil pressure, surperficial on-load pressure when two-way cylinder loads in cylinder, the compression area in two-way cylinder cylinder) in cylinder; Two-way cylinder quantity and exerting oneself accordingly with travel parameters in table 2.The size of two-way cylinder and sealing adopt international standards to make, with the seal fitting buying avoiding two-way cylinder and the trouble used.
Table 1 two-way cylinder range and quantity statistics table
The loading number of channels of table 2 two-way cylinder and exerting oneself accordingly and dimensional parameters table
The two-way cylinder frictional force that the utility model proposes based on method of least squares is eliminated controlling method, and is achieved automatic " elimination " to casing wall frictional force.Traditional loading equipemtn have ignored two-way cylinder or the frictional force between jack and its inwall to actual loss of exerting oneself, the utility model effectively overcomes frictional force to actual impact of exerting oneself by following measures: each two-way cylinder before being taken into use, to test in different cylinder oil pressure and actual corresponding relation of exerting oneself in oil cylinder of (choosing 5%, 20%, 40%, 60%, 80%, 100% of two-way cylinder design maximum output value respectively) in oil pressure situation, these loose putting are carried out curve fitting; By curve data stored in the control program in cooperation control computer, when real work, servo-control system can automatically according to actual go out pressure required value inverse two-way cylinder should have oil pressure, and then oil pressure value etc. in adjustment two-way cylinder automatically; The method effectively overcomes the frictional force of the two-way cylinder inside wall of cylinder to the impact of reality output load, ensures that actual loaded is exerted oneself accurate.
1.2, power source is loaded:
Load power source to be made up of main power source, manual pressure supplement system two part, main power source and manual pressure supplement system are for being connected in parallel.
1.2.1, main power source adopts two-way constant voltage pumping plant, and two-way constant voltage pumping plant comprises low pressure pump group, high-pressure service pump group, fuel tank heater, tubular type one-way valve, board-like connection high-voltage ratio relief valve, board-like connection low pressure proportional pressure control valve, high-power cooler, is provided with the filter of height force feed module, oil pressure sensor, shock-proof pressure gauge, the bimetallic thermometer etc. of bypass valve and differential pressure signaling device.Wherein: fuel tank heater is arranged on the hydraulic oil container of low pressure pump group and high-pressure service pump group; Bimetallic thermometer measuring section is placed in fuel tank; Tubular type one-way valve is arranged in the low pressure pump group of two-way constant voltage pumping plant and the export pipeline of high-pressure service pump group; Board-like connection high voltage/low voltage proportional pressure control valve is arranged on the outlet port (low pressure pump group and high-pressure service pump group are installed the board-like of different model respectively and be connected proportional pressure control valve) of low pressure pump group and high-pressure service pump group; Height force feed filter module and high-power cooler are arranged in the different brackets pressure piping of the high-voltage output end of low pressure pump group and high-pressure service pump group, are also provided with bypass valve and differential pressure signaling device in the pressure piping height force feed filter module of output terminal; Each pump group has 2 oil pressure sensors, wherein one be positioned at board-like connection high voltage/low voltage proportional pressure control valve after, monitor the pressure of board-like connection high voltage/low voltage proportional overflow valve outlet port; Another, on multichannel oil separator, monitors the pressure of working connection module.Shock-proof pressure gauge is arranged on board-like connection proportional pressure control valve outlet port.
Low pressure pump group is by ABB motor (1.5KW, model M2QA160M6A/B3/1.5KW/380V/50HZ), plunger pump, coupling and hydraulic oil container composition, pressure rating 31.5MPa, power 1.5KW, rotating speed 1470r/min, peak rate of flow 3.75L/min, oil hydraulic pump maximum service pressure is 21MPa, and sense of rotation is seen as clockwise direction from pump shaft end.ABB motor (1.5KW) is connected with plunger pump by coupling, and plunger pump is arranged on hydraulic oil container upper cover top, for hydraulic system provides power oil sources.
High-pressure service pump group is by ABB motor (7.5KW, model M2QA160M6A/B3/7.5KW/380V/50HZ), plunger pump, coupling and hydraulic oil container composition, pressure rating 31.5MPa, power 7.5KW, rotating speed 1470r/min, peak rate of flow 15L/min, oil hydraulic pump maximum service pressure is 10MPa, sense of rotation is seen as clockwise direction from pump shaft end, ABB motor (7.5KW) is connected with plunger pump by coupling, plunger pump is arranged on its hydraulic oil container connected and covers, for hydraulic system provides power oil sources.
Two-way constant voltage pumping plant is that two groups of pressure are different, the compression pump group that flow is different, adopt the object of two-way constant voltage pumping plant to be start two pump groups at the two-way cylinder pressurization initial stage of main power source simultaneously, accelerate no-load running speed, when all loops all reach setting pressure, high-pressure service pump group is closed, and low pressure pump group is also closed simultaneously; Complete ftercompction when loading loop needs automatically to start low pressure pump group during ftercompction, ftercompction completes low pressure pump group and quits work.The above method of operation, by pumping plant control box and cooperation control computer controlled automatic, can play the object that funds are saved in environmental protection and energy saving.
The fuel tank heater power 1KW of two-way constant voltage pumping plant, AC supply voltage 220V, frequency 50HZ, fuel tank heater, for heating fluid in hydraulic oil container, is arranged on hydraulic oil container side plate; Start fuel tank heater heating fluid when hydraulic oil container oil temperature is down to 25 °, when hydraulic oil container oil temperature rises to 35 °, fuel tank heater power-off, stops heating fluid.
On high-pressure service pump group and low pressure pump group export pipeline, the inside nominal diameter of tubular type one-way valve is respectively 10mm and 6mm, pressure rating 31.5MPa, cracking pressure 0.035MPa, the effect of tubular type one-way valve is that when preventing high-pressure service pump group or low pressure pump group from quitting work, fluid flows back in pump group, improves the stability of two-way constant voltage pumping plant.
Board-like connection low pressure proportional pressure control valve (this brand of Italian atropic of low pressure pump group outlet, model: RZMO-AE-06/315/I), inside nominal diameter 6mm, maximal regulated pressure 31.5MPa, minimum conciliation pressure 0.7MPa, peak rate of flow 4L/min, VDC 24DV, input signal 4 ~ 20mA, controls to let out in oily internal control, and the pressure adjusting amount of board-like connection low pressure proportional pressure control valve is directly proportional to input electrical signal.
High-pressure service pump group exports board-like connection high-voltage ratio relief valve (this brand of Italian atropic, model: AGMZO-AE-10/315/I), inside nominal diameter 10mm, maximal regulated pressure 31.5MPa, minimum conciliation pressure 0.7MPa, peak rate of flow 200L/min, VDC 24DV, input signal 4 ~ 20mA, controls to let out in oily internal control, and the pressure adjusting amount of board-like connection high-voltage ratio relief valve is directly proportional to input electrical signal; Board-like connection high-voltage ratio relief valve is also furnished with Manual pressure adjustment function, can limit maximum oil force value.
The height force feed filter module of the high-voltage output end of high-pressure service pump group and low pressure pump group is arranged in the outlet of different brackets pressure piping, in order to remove or to stop due to the impurity worn and torn when the external world brings element manipulation into and the chemical action of oily medium own produces.Height force feed filter module is specially adapted to servo-control system; can prevent high-precision control unit and executive component due to pollution premature abrasion or stuck; thus can fault be reduced; extension element working life, bypass valve and the differential pressure signaling device of height force feed filter module play double protection functions.
The oil pressure sensor of each pump group totally 2, operating voltage is DV24V, and output signal is 4 ~ 20mA, can display measurement point pressure, can measuring pressure scope 0 ~ 21MPa.
High-power cooler is forced air cooler, model FL-2, and power of fan 90W, rotating speed 1800RPM, be serially connected in function working connection module with heat radiation, to reduce oil temperature; When continuous pressure hydraulic oil can heat up when the set temperature is reached, start high-power cooler, cooling is carried out to hydraulic oil.
Bi-metal temperature counts the proud imperial board WSS-484 model in Shanghai, range 0-100 DEG C.
Shock-proof pressure gauge is universal YN-60 model, pressure measurement scope (0 ~ 25) MPA; Be arranged between board-like connection high voltage/low voltage proportional pressure control valve and hydraulic lock, for measuring the pressure of board-like connection high voltage/low voltage proportional overflow valve outlet port.
1.2.2 the manual pressure supplement system, loading power source by with often organize the quick closing valve valve installed in passage that multichannel oil separator is connected and manual ftercompction pump forms; Manual pressure supplement system is to meet the needs of uninterrupted test under temporary interruption or servo-control system failure conditions.
When the long-time dead electricity of servo-control system, cannot automatic compensation time, connect manual ftercompction pump and pressure be transferred to the normal pressure size of this oil circuit, open quick closing valve valve, start manual ftercompction, after reaching test requirements document pressure, close quick closing valve valve, take off manual ftercompction pump, this path manual ftercompction terminates; Other passage needs manual ftercompction can carry out successively according to said method.
1.3, multichannel oil separator:
Because load mode is static load or semi-static load, require lower to loading end travelling speed, and without the Rapid Variable Design demand of loading direction, therefore native system adopts 15 multichannel oil separators to be connected in parallel, often organize multichannel oil separator and connect multiple two-way cylinder, meet the demand of actual loaded in the mode of dividing into groups to load.Multichannel oil separator adopts sub-module design, and multiple two-way cylinders that each multichannel oil separator controls are a module; Each module can independently be installed, and also can superpose the module of installing any amount as required.Can lay down easily when not needing, multichannel oil distributor structure and Placement are as shown in Figure 3.
Multichannel oil separator is made up of parts such as working connection module, servo ratio reduction valve, three-position four-way electromagnetic directional valve, oil pressure sensor, bladder high pressure accumulator group, pressure display table, electrohydraulic control, hydraulic lock.Working connection module is a mountion plate, employing integrated package is integrated, by the turner technology in modern times, the connecting pipeline of design is processed as required in the inside of working connection module, and for installing the position of the parts such as servo ratio reduction valve, three-position four-way electromagnetic directional valve, oil pressure sensor, bladder high pressure accumulator group, pressure display table, and realize the function of hydraulic control.The concrete annexation of each parts is: servo ratio reduction valve is directly connected with the export pipeline of two-way constant voltage pumping plant, three-position four-way electromagnetic directional valve respectively with servo ratio reduction valve, the height force feed filter module of two-way constant voltage pumping plant, hydraulic lock is connected, at three-position four-way electromagnetic directional valve other installation electrohydraulic control, between three-position four-way electromagnetic directional valve and two-way cylinder, successively hydraulic lock is installed, oil pressure sensor, bladder high pressure accumulator group, pressure display table, hydraulic lock is passed through successively in the loop of two-way cylinder, three-position four-way electromagnetic directional valve enters two-way constant voltage pumping plant.
As shown in table 2, this servo loading system has 7 kinds of sizes of exerting oneself, 15 groups of totally 106 two-way cylinders.Often all in group two-way cylinder outlet ports share a multichannel oil separator, the outlet section of each multichannel oil separator has a servo ratio reduction valve and a three-position four-way electromagnetic directional valve, control the loading and unloading of all two-way cylinders of this group, go out force value with the loading of all two-way cylinders in group identical with unloading rate.
1. working connection module: often organize two-way cylinder and connect a multichannel oil separator, the core of each multichannel oil separator is working connection module.Each working connection module is the oil pressure by being arranged on servocontrol in servo-control system and sampling plate and controlling servo ratio reduction valve in this working connection module and three-position four-way electromagnetic directional valve by and then control in all two-way cylinders corresponding to this working connection module, each working connection module can work alone, also can with other working connection module according to set model collaborative work.
2. servo ratio reduction valve: adopt this product of atropic (model AGRCZO-AE-10/210/I), as shown in table 2, native system has 7 kinds of dissimilar totally 15 groups of two-way cylinders: in the cylinder of 10 groups of two-way cylinders above, oil pressure is at below 13MPa, oil pressure is less, therefore the board-like connection of servo ratio reduction valve employing, inside nominal diameter 10mm, maximal regulated pressure 21MPa, peak rate of flow is 160L/min, input signal 4 ~ 20mA, this valve is two-stage Normally closed type proportional pressure-reducing valve, by pressure regulation power and the proportional relation of input electrical signal; 5 groups of two-way cylinders below reach more than 20MPa due to oil pressure in oil cylinder, and the servo ratio reduction valve therefore adopted is board-like connection, inside nominal diameter 10mm, maximal regulated pressure 31.5MPa, and peak rate of flow is 160L/min, input signal 4-20mA; This valve is also two-stage Normally closed type proportional pressure-reducing valve, by the proportional relation of electrical signal of pressure regulation power and input.
3. hydraulic lock has another name called Pilot operated check valve, is German BOSCH-REXROTH product; When system enters packing state, hydraulic lock ensures that hydraulic oil can not blow back in fuel tank.
4. three-position four-way electromagnetic directional valve: be the reversing slide valve of operation electriomagnet, is used for controlling the unlatching of liquid stream in two-way cylinder, stopping and direction.During electromagnet power-off, the spool spring that is reset back into home position.When left electromagnet energising, the power of electromagnet acts on spool through push rod, shifts spool onto required working position by state of rest, and liquid stream is logical by P to A, B to T, and oil cylinder is released; When right electromagnet energising, the power of electromagnet acts on spool through push rod, shifts spool onto required working position by state of rest, and liquid stream is logical by P to B, A to T, and two-way cylinder is return.
For keeping loading force to stablize under long-time oil-break state, multichannel oil separator adopting three-position four-way electromagnetic directional valve to open and cuts off fuel feeding and return line.When loading force reaches setting value or suddenly power-off when, the power-off of three-position four-way electromagnetic directional valve electromagnet, solenoid directional control valve is in neutral position, and hydraulic lock oppositely closes to make oil pressure keep the loading force reached.Consider that the positive and negative oil pocket of two-way cylinder leaks the system decompression factor caused mutually.
Multichannel oil separator installs jumbo bladder high pressure accumulator group additional, form power-off pressure holding function: when duration of test power-off, three-position four-way electromagnetic directional valve and hydraulic lock act on simultaneously and have turned off fuel feeding on multichannel oil separator and oil returning tube, jumbo bladder high pressure accumulator group can compensate because fluid reveals the system decompression caused in time simultaneously, and system pressure can not be decayed within 24 hours after unexpected power-off.Simultaneously, often organize two-way cylinder and a set of quick closing valve valve is installed and manual ftercompction pump forms manual pressure supplement system, multichannel oil separator installs shock-proof pressure gauge and quick closing valve valve: when the long-time dead electricity of servo-control system additional, cannot servo automatic compensation time, connect the desired value size that this group in-cylinder pressure is transferred to pressure by manual ftercompction pump, open quick closing valve valve, manual ftercompction again, close quick closing valve valve after reaching setting value, take off Manual pressurization pump, the manual ftercompction in this road terminates.
2, as shown in Figure 4, servo-control system mainly forms and comprises: the operating console be made up of two interconnective 2 operating table (operating table one, operating table two), the cooperation control computer storing test Relational database, pumping plant control box, in parallel 15 cover oil circuit control boxs, wherein, operating console (2 operating table), pumping plant control box, 15 cover oil circuit control boxs are connected with cooperation control computer respectively.
(1) operating console (2 operating table) of the present embodiment: adopt the commercial PC (780MT) of Dell, 22 inch liquid crystal displays, are wherein previously stored with the control program using MicrosoftVisualStudio exploitation; Operating console, for receiving the control command of operator and instruction being conveyed to cooperation control computer, loads the statistical analysis of data and pressure data, form and statistic curve figure by the programming automatic generation in operating console simultaneously.2 operating table lay respectively on pumping plant control box and oil circuit control box: the operating table on pumping plant control box controls the startup of Electric Machine at Pumping Station and stops ensureing the pressure required for pipeline; Operating table on each oil circuit control box makes to adjust each road two-way cylinder pressure.
(2) cooperation control computer: cooperation control computer, for carrying out Detection & Controling to machinery equipment in the process such as production procedure, data parameters, be control command and sampled signal turn originator, be also the storage person loading data.
What the cooperation control computer of native system selected Advantech company of the U.S. to produce grinds magnificent IPC-610 process control machine, prestore the Detection & Controling program that useful MicrosoftVisualStudio develops, run on Windows system platform, data store and adopt SQLServer database.Cooperation control computer be control command and sampled signal turn originator, be also the storage person loading data simultaneously.Cooperation control computer by RS485 interface and oil circuit control box and the communication of pumping plant control box, by Ethernet interface and console communication.As shown in Figure 4, control command is transmitted to the control panel in pumping plant control box and oil circuit control box by cooperation control computer, the information such as the running state of each pumping plant and oil circuit are passed to operating console, and cooperation control computer realizes the inspection of above-mentioned function and control program is worked out according to conventional programming techniques by programming personnel.
(3) pumping plant control box: the built-in pumping plant control panel of pumping plant control box, nucleus product in the STM32-F107 of employing ST Microelectronics, the stronger product of performance in the brand-new STM32 interconnected type Series of MCU that STM32-F107 kernel Shi Yi method company produces, IAREmbeddedWorkbenchforARM and pid algorithm exploitation is adopted to form, pumping plant control panel monitoring pumping plant oil pressure and oil temperature signal, ensure sampling and the correct execution controlled.
Pumping plant control box has four kinds of signal input output channels or the interfaces such as High Speed Analog acquisition channel, highi degree of accuracy controllable simulation output channel, the real-time controlled output channel of three railway digitals, High-Speed RS 485 communication interface (this interface does not use).As shown in Figure 5, pumping plant control box input end with load the oil pressure sensor, thermometer, three-position four-way electromagnetic directional valve etc. installed in two-way constant voltage pumping plant and multichannel oil separator in power source and be connected.Wherein, pressure transducer is analog signal output, and its output terminal directly receives the High Speed Analog acquisition channel of pumping plant control panel; Three-position four-way electromagnetic directional valve is connected with the real-time controlled output channel of three railway digitals of pumping plant control panel; The bypass valve of oil strain module is connected with highi degree of accuracy controllable simulation (highi degree of accuracy controllable simulation output channel the is a tunnel name) output channel of pumping plant control panel with differential pressure signaling device.Pumping plant control box output terminal respectively with load power source high-pressure service pump group (maximum service pressure 21MPa), be board-likely connected high-voltage ratio relief valve, low pressure pump group (maximum service pressure 10MPa), board-like connection low pressure proportional pressure control valve be connected with fuel tank heater etc.
The workflow of pumping plant control box as shown in Figure 6, controls high-pressure service pump group and the operation of low pressure pump group, the board-like pressure of connection high voltage/low voltage proportional pressure control valve and the working state of fuel tank heater; After this servo loading system runs, the data such as temperature, pressure of pumping plant control box Real-Time Monitoring high-pressure service pump group or low pressure pump group, and by program to Monitoring Data Real-time Feedback and then the index such as temperature, pressure controlling high-pressure service pump group or low pressure pump group.
(4) oil circuit control box: native system has 15 cover oil circuit control boxs, often overlaps the built-in a set of servocontrol of oil circuit control box and sampling plate, for controlling corresponding oil circuit.Servocontrol and sampling plate adopt the STM32-F107 technical grade cpu chip of ST Microelectronics, inside have the program adopting IAREmbeddedWorkbenchforARM and pid algorithm exploitation, ensure oil circuit sampling and the correct execution controlled.The work-based logic block diagram of oil circuit control box and annexation are as shown in Figure 7.The input end of oil circuit control box is connected with the oil pressure sensor in this group multichannel oil separator; Servo ratio reduction valve and the three-position four-way electromagnetic directional valve of output terminal and multichannel oil separator are connected.
The servocontrol of installing in oil circuit control box and sampling plate adopt the STM32-F107 technical grade cpu chip of ST Microelectronics to have High Speed Analog acquisition channel, highi degree of accuracy controllable simulation output channel, the real-time controlled output channel of three railway digitals, High-Speed RS 485 communication interface.Oil pressure sensor is analog signal output, and therefore, it directly receives the High Speed Analog acquisition channel of servocontrol and sampling plate; Servo ratio reduction valve and three-position four-way electromagnetic directional valve receive the real-time controlled output channel of three railway digitals of servocontrol and sampling plate.Servocontrol and sampling plate monitor the fuel injection pressure signal on each road, control the operation of servo ratio reduction valve and three-position four-way electromagnetic directional valve, its workflow is as shown in Figure 8: by the fuel injection pressure signal of timing or Real-time Collection oil pressure sensor, is input to the servocontrol that servocontrol and sampling plate carry out analyzing also feedback processing and then realize oil circuit pressure.
The operating process of the present embodiment system:
(1) system compensation: the oil cylinder used is about to each, (select and design 5%, 20%, 40%, 60%, 80%, 100% of maximum output) oil pressure and actual corresponding relation of exerting oneself in oil cylinder respectively in test different pressures situation, these loose points are carried out curve fitting; By the numbering of each two-way cylinder and curve data in the program stored in cooperation control computer.
(2) the CPU numbering of pumping plant control box, each oil circuit control box is set: first connect with experiment in to number pumping plant control box CPU and the CPU of each oil circuit control box numbers and arranges, and corresponding, without the need to arranging again in use from now on.Pumping plant control box is set, the CPU numbering of each oil circuit control box is to make oil circuit corresponding in the servocontrol of pumping plant control box and the control panel in sampling plate, each oil circuit control box and control software design corresponding, namely in order to cooperation control computer identifies pumping plant control box and each oil circuit control box and numbers.
(3) mounting point of oil circuit is set: the oil circuit of reality is mapped with the oil circuit in experiment, and adds in experimental series, be stored in cooperation control computer.
(4) loading parameters and experiment information are set: the loading parameters load this experiment every layer and Test Information are arranged, and comprise each pressure, the number of plies etc. that load.
(5) start-up loading;
(6) according to real-time loading procedure monitored results (feedback such as temperature, pressure), operating console is arranged and adjustment real-time loading process automatic or manual;
(7) if there is situations such as power-off, automatically control inefficacy, manual compensation device supplementary pressure can be used;
(8) off-test, utilizes control software design to carry out initial analysis process to test result, derives laboratory data;
(9) shut down.
Claims (8)
1. a large-sized multifunction geotechnical structure model test platform multiple spot servo loading system, it is characterized in that, this system comprises: the hydraulic system be made up of 15 groups of two-way cylinders, loading power source, 15 tunnel multichannel oil separators, and servo-control system, wherein, load power source to be connected with two-way cylinder by multichannel oil separator, servo-control system is connected with multichannel oil separator with loading power source respectively; Often organize two-way cylinder to be made up of identical multiple two-way cylinders of exerting oneself; Often organizing the corresponding road multichannel oil separator of two-way cylinder, often organize two-way cylinder and form a passage, is independent layout that walk abreast with the two-way cylinder in group between group.
2. the system as claimed in claim 1, is characterized in that, with external displacement transducer in described each two-way cylinder; With the two-way cylinder in group, an electrohydraulic control is installed altogether.
3. the system as claimed in claim 1, is characterized in that, described loading power source is made up of main power source, manual pressure supplement system two-part, and main power source and manual pressure supplement system are for being connected in parallel; Described main power source adopts two-way constant voltage pumping plant, and two-way constant pressure pump station owner will comprise low pressure pump group, high-pressure service pump group, fuel tank heater, tubular type one-way valve, board-like connection high-voltage ratio relief valve, board-like connection low pressure proportional pressure control valve, be provided with the filter of height force feed module, oil pressure sensor, shock-proof pressure gauge, the bimetallic thermometer of bypass valve and differential pressure signaling device; Wherein: fuel tank heater is arranged on the hydraulic oil container of low pressure pump group and high-pressure service pump group; Bimetallic thermometer measuring section is placed in fuel tank; Tubular type one-way valve is arranged in the low pressure pump group of two-way constant voltage pumping plant and the export pipeline of high-pressure service pump group; Board-like connection high voltage/low voltage proportional pressure control valve is arranged on the outlet port of low pressure pump group and high-pressure service pump group; Height force feed filter module is arranged in the different brackets pressure piping of the high-voltage output end of low pressure pump group and high-pressure service pump group respectively, is also provided with bypass valve and differential pressure signaling device in the pressure piping height force feed filter module of output terminal; Each pump group has 2 oil pressure sensors, wherein one be positioned at board-like connection high voltage/low voltage proportional pressure control valve after, another on multichannel oil separator, the pressure of monitoring working connection module; Shock-proof pressure gauge is arranged on the outlet port of board-like connection proportional pressure control valve; Described manual pressure supplement system by with often organize the quick closing valve valve installed in passage that multichannel oil separator is connected and manual ftercompction pump forms.
4. the system as claimed in claim 1, it is characterized in that, described multichannel oil separator comprises working connection module, servo ratio reduction valve, three-position four-way electromagnetic directional valve, oil pressure sensor, bladder high pressure accumulator group, pressure display table, electrohydraulic control, hydraulic lock, working connection module is an installation module, for installing servo ratio reduction valve, three-position four-way electromagnetic directional valve, oil pressure sensor, bladder high pressure accumulator group, the position of pressure display table, and realize the function of hydraulic control, the concrete annexation of each parts is: servo ratio reduction valve is directly connected with the export pipeline of two-way constant voltage pumping plant, three-position four-way electromagnetic directional valve respectively with servo ratio reduction valve, the height force feed filter module of two-way constant voltage pumping plant, hydraulic lock is connected, at three-position four-way electromagnetic directional valve other installation electrohydraulic control, between three-position four-way electromagnetic directional valve and two-way cylinder, successively hydraulic lock is installed, oil pressure sensor, bladder high pressure accumulator group, pressure display table, hydraulic lock is passed through successively in the loop of two-way cylinder, three-position four-way electromagnetic directional valve enters two-way constant voltage pumping plant.
5. the system as claimed in claim 1, it is characterized in that, servo-control system mainly forms and comprises: the operating console be made up of two interconnective operating table, the cooperation control computer storing test Relational database, pumping plant control box, in parallel 15 cover oil circuit control boxs, wherein, operating console, pumping plant control box, each cover oil circuit control box are connected with cooperation control computer respectively; Control program is previously stored with in described 2 operating table; 2 operating table lay respectively on pumping plant control box and oil circuit control box.
6. the system as claimed in claim 1, is characterized in that, described cooperation control computer by RS485 interface and oil circuit control box and the communication of pumping plant control box, by Ethernet interface and console communication.
7. the system as claimed in claim 1, is characterized in that, the built-in pumping plant control panel of described pumping plant control box.
8. the system as claimed in claim 1, is characterized in that, described often the cover built-in a set of servocontrol of oil circuit control box and sampling plate, and the input end of oil circuit control box is connected with the oil pressure sensor in this group multichannel oil separator; Servo ratio reduction valve and the three-position four-way electromagnetic directional valve of output terminal and multichannel oil separator are connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520771073.0U CN205025865U (en) | 2015-09-30 | 2015-09-30 | Servo loading system of large -scale multi -functional ground structural model test platform multiple spot |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520771073.0U CN205025865U (en) | 2015-09-30 | 2015-09-30 | Servo loading system of large -scale multi -functional ground structural model test platform multiple spot |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205025865U true CN205025865U (en) | 2016-02-10 |
Family
ID=55258402
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520771073.0U Withdrawn - After Issue CN205025865U (en) | 2015-09-30 | 2015-09-30 | Servo loading system of large -scale multi -functional ground structural model test platform multiple spot |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205025865U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105240350A (en) * | 2015-09-30 | 2016-01-13 | 清华大学 | Large multifunctional rock-soil structure model test platform multi-point servo loading system |
| CN106338969A (en) * | 2016-10-21 | 2017-01-18 | 吉林大学 | Reliability test apparatus and test method for electro-hydraulic servo feeding system |
-
2015
- 2015-09-30 CN CN201520771073.0U patent/CN205025865U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105240350A (en) * | 2015-09-30 | 2016-01-13 | 清华大学 | Large multifunctional rock-soil structure model test platform multi-point servo loading system |
| CN106338969A (en) * | 2016-10-21 | 2017-01-18 | 吉林大学 | Reliability test apparatus and test method for electro-hydraulic servo feeding system |
| CN106338969B (en) * | 2016-10-21 | 2018-09-14 | 吉林大学 | Electro-hydraulic servo feed system reliability test and test method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105240350A (en) | Large multifunctional rock-soil structure model test platform multi-point servo loading system | |
| CN110823613B (en) | Tunnel surrounding rock and lining coupling structure bearing waterproof test system and method | |
| CN102278124B (en) | Energy-saving hydraulic shield propulsion system | |
| CN103671336B (en) | Load sensitive hydraulic system and power matching control method, device and system | |
| CN205025865U (en) | Servo loading system of large -scale multi -functional ground structural model test platform multiple spot | |
| CN204646867U (en) | A kind of hydraulic system of cylinder bench | |
| CN101995354B (en) | Water pressure testing machine pressure balancing device and control method thereof | |
| CN104776086B (en) | Remanufacture oil cylinder performance detecting platform | |
| CN201503346U (en) | Control system for detecting oil temperature of speed changer | |
| CN109441912A (en) | A kind of Intelligent Hydraulic loading tester | |
| CN103352900A (en) | Heavy-duty mining dump vehicle hydraulic oil cylinder/hydraulic valve test table | |
| CN203176063U (en) | Test bed of hydraulic servo valve | |
| CN101726440B (en) | CNC pressurizing system for model test and control method thereof | |
| CN102519683B (en) | Energy-saving testing device for high-temperature high-pressure performance of down-hole packer | |
| CN202612229U (en) | Hydraulic ultra-high boosting system | |
| CN203081905U (en) | Test bed of valve actuator cylinder | |
| CN202718397U (en) | Prestress automatic tensioning system | |
| CN201983993U (en) | Load maintaining hydraulic device for creep test in power failure | |
| CN204113783U (en) | A kind of for the hydraulic pressure synchronous drive device in nuclear fusion device | |
| CN103775399B (en) | For the hydraulic system of tunnel loading test platform | |
| CN101144493A (en) | Dynamic compensation hydraulic pressure servo valve null shift method | |
| CN102953550B (en) | Manual-automatic integrated tensioning system | |
| CN205918670U (en) | Beat sign indicating number hydraulic press hydraulic control system | |
| CN204099314U (en) | The automatic thickness hydraulic control system of high low pressure independence split | |
| CN203465082U (en) | Test stand for stop valve of hydraulic bracket |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20160210 Effective date of abandoning: 20170616 |