CN105403404A - Conveyer belt fatigue test device - Google Patents
Conveyer belt fatigue test device Download PDFInfo
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- CN105403404A CN105403404A CN201510921146.4A CN201510921146A CN105403404A CN 105403404 A CN105403404 A CN 105403404A CN 201510921146 A CN201510921146 A CN 201510921146A CN 105403404 A CN105403404 A CN 105403404A
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- 238000009661 fatigue test Methods 0.000 title claims abstract description 34
- 238000012360 testing method Methods 0.000 claims abstract description 52
- 239000002828 fuel tank Substances 0.000 claims description 50
- 239000012530 fluid Substances 0.000 claims description 27
- 230000008676 import Effects 0.000 claims description 12
- 238000001514 detection method Methods 0.000 claims description 6
- 239000002243 precursor Substances 0.000 claims description 5
- 239000000446 fuel Substances 0.000 claims description 4
- 239000003921 oil Substances 0.000 description 92
- 238000000034 method Methods 0.000 description 12
- 230000001276 controlling effect Effects 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000295 fuel oil Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- GOLXNESZZPUPJE-UHFFFAOYSA-N spiromesifen Chemical compound CC1=CC(C)=CC(C)=C1C(C(O1)=O)=C(OC(=O)CC(C)(C)C)C11CCCC1 GOLXNESZZPUPJE-UHFFFAOYSA-N 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
- G01M13/02—Gearings; Transmission mechanisms
- G01M13/023—Power-transmitting endless elements, e.g. belts or chains
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
- G01M13/02—Gearings; Transmission mechanisms
- G01M13/025—Test-benches with rotational drive means and loading means; Load or drive simulation
- G01M13/026—Test-benches of the mechanical closed-loop type, i.e. having a gear system constituting a closed-loop in combination with the object under test
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- General Physics & Mathematics (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention provides a conveyor belt fatigue testing device, which comprises: the two ends of the tested conveyor belt are fixedly arranged on the test bench and can drive the test bench to rotate around the rotating shaft; the driving system comprises a hydraulic motor and a motor driving part for driving the hydraulic motor to rotate, the hydraulic motor is connected with the conveying belt and drives the conveying belt to move, and the motor driving part is connected with the hydraulic motor; and the load system comprises a first load piston cylinder and a second load piston cylinder which are connected to the test bench and positioned on two sides of the rotating shaft, and the first load piston cylinder and the second load piston cylinder are connected with auxiliary control parts for controlling the oil outlet pressure of a rodless cavity of the first load piston cylinder and the rodless cavity of the second load piston cylinder. The conveyor belt fatigue testing device has the advantages of compact structure, reasonable design and the like, and can test the fatigue performance of the conveyor belt conveniently, quickly, accurately and efficiently.
Description
Technical field
The present invention relates to wind power generating set auxiliary test unit field, particularly relate to a kind of travelling belt fatigue test device.
Background technology
Cog belt becomes the one important change oar technology that oar is Large-scale Wind Turbines, because the working environment of aerogenerator is comparatively complicated, and change oar acts frequently, therefore require higher to the fatigue behaviour becoming oar cog belt, the life-span that General Requirements becomes oar cog belt is not less than 20 years.
The method of test cog belt fatigue lifetime can adopt cog belt on-hook to test, and cog belt is arranged in wind power generating set, judges its characteristic by cog belt in the postrun test result of aerogenerator.This kind of method test period is longer, and exists uncertain in test process, lessly in current practical application uses.
At present, the method for test cog belt fatigue lifetime is mainly carried out in laboratory, becomes oar ruuning situation, pull cog belt run with load, and test the fatigue lifetime of cog belt with this by cog belt fatigue experimental device wind-driven generator simulation.Existing test unit load mode hangs up weight at cog belt two ends, rotated and reverse drive cog belt pull-up and transfer weight by driven wheel, tests cog belt fatigue lifetime in the process of so continuous circular flow.But, the load that existing test unit needs hanging comparatively heavy, and load weight adjustment comparatively bothers, and carries out cog belt test and uses inconvenience, make testing efficiency lower.
Summary of the invention
Embodiments of the invention provide a kind of travelling belt fatigue test device, to solve the awkward problem of cog belt proving installation of the prior art.
For achieving the above object, embodiments of the invention provide a kind of travelling belt fatigue test device, comprising: test board, and the two ends of tested travelling belt are fixedly installed on test board, and test board can be driven to rotate around the axis; Drive system, the motor driving part that drive system comprises oil motor and drives described oil motor to rotate, oil motor is connected with travelling belt, and drives conveyer belt, and motor driving part is connected with oil motor; Load system, load system comprises and is connected on test board and is positioned at the first load piston cylinder and the second load piston cylinder of rotating shaft both sides, the first load piston cylinder and the second load piston cylinder is connected with the assist control oil pressure of the rodless cavity of control first load piston cylinder and the rodless cavity of the second load piston cylinder.
Further, the first fuel-displaced branch road is connected with between the rodless cavity of the first load piston cylinder and fuel tank, be connected with the second fuel-displaced branch road between the rodless cavity of the second load piston cylinder and fuel tank, assist control comprises the first surplus valve be arranged on the first fuel-displaced branch road and the second surplus valve be arranged on the second fuel-displaced branch road.
Further, first surplus valve and the second surplus valve are precursor overflow valve, assist control also comprises the first operation valve and the second operation valve, first operation valve is connected with the control mouth of the first surplus valve and controls the oil pressure relief of the first surplus valve, and the second operation valve is connected with the control mouth of the second surplus valve and controls the oil pressure relief of the second surplus valve.
Further, the first repairing branch road is connected with between the rodless cavity of the first load piston cylinder and fuel tank, be connected with the second repairing branch road between the rodless cavity of the second load piston cylinder and fuel tank, assist control also comprises the first repairing operation valve of control first repairing branch road break-make and controls the second repairing operation valve of the second repairing branch road break-make.
Further, travelling belt fatigue test device also comprises: the first pressure transducer, and what it tested the rodless cavity of the first load piston cylinder goes out oil pressure; Second pressure transducer, what it tested the rodless cavity of the second load piston cylinder goes out oil pressure; Control module, its be connected with the first pressure transducer and the second pressure transducer and control that assist control regulates the rodless cavity of the first load piston cylinder and the second load piston cylinder according to detected pressures go out oil pressure.
Further, drive division comprises: hydraulic pump, is connected and to oil motor fuel feeding with oil motor; Reversal valve, it is arranged between hydraulic pump and oil motor, and reversal valve comprises cut-off station, positive switching stations and reversion station, when being in cut-off station, oil circuit cut-off between hydraulic pump and oil motor, oil motor does not work; When being in positive switching stations, the oil-out of hydraulic pump is communicated with the first hydraulic fluid port of oil motor, and the second hydraulic fluid port of oil motor is communicated with fuel tank, and oil motor rotates forward; When being in reversion station, the oil-out of hydraulic pump is communicated with the second hydraulic fluid port of oil motor, and the first hydraulic fluid port of oil motor is communicated with fuel tank, and oil motor reverses.
Further, reversal valve is solenoid directional control valve, it has P mouth, T mouth, A mouth and B mouth, the P mouth of reversal valve is connected with the oil-out of hydraulic pump, T mouth is connected with fuel tank, and A mouth is connected with the first hydraulic fluid port of oil motor, and B mouth is connected with the second hydraulic fluid port of oil motor, when being in cut-off station, P mouth, T mouth, A mouth and B mouth all end; When being in positive switching stations, P mouth is communicated with A mouth, and T mouth is communicated with B mouth; When being in reversion station, P mouth is communicated with B mouth, and T mouth is communicated with A mouth.
Further, drive division also comprises the first safety valve for the working pressure of hydraulic control motor and the second safety valve, and the import of the first safety valve is connected with the A mouth of reversal valve, and the outlet of the first safety valve is connected with fuel tank; The import of the second safety valve is connected with the B mouth of reversal valve, and the outlet of the second safety valve is connected with fuel tank.
Further, drive system also comprises the first Fill valve and the second Fill valve, the import of the first Fill valve is connected with fuel tank, the outlet of the first Fill valve is connected with the first hydraulic fluid port of oil motor, the import of the second Fill valve is connected with fuel tank, and the outlet of the second Fill valve is connected with the second hydraulic fluid port of oil motor.
Further, travelling belt fatigue test device also comprises: position-detection sensor, and it detects the extended position of the piston rod of the first load piston cylinder and the second load piston cylinder; Control module, the extended position information of control module receiving position detecting sensor transmission, and control reversal valve switching station according to extended position information.
The travelling belt fatigue test device of embodiments of the invention, oil motor is driven to rotate by motor driving part, drive travelling belt to rotate by oil motor and then drive test board to rotate, by being connected to the real load of the load system Imitation conveyance band actual operating mode on test board, the fatigue behaviour of travelling belt effectively can be tested out.
Accompanying drawing explanation
Fig. 1 is the structural representation of travelling belt fatigue test device of the present invention.
Description of reference numerals:
1, hydraulic pump; 2, reversal valve; 3, oil motor; 31, the first hydraulic fluid port; 32, the second hydraulic fluid port; 4, the first safety valve; 41, the second safety valve; 42, the 3rd safety valve; 5, the first Fill valve; 51, the second Fill valve; 52, oil control valve is gone out; 6, the first repairing operation valve; 61, the second repairing operation valve; 7, the first surplus valve; 71, the second surplus valve; 8, the first operation valve; 81, the second operation valve; 9, the first load piston cylinder; 91, the second load piston cylinder; 10, heating radiator; 11, filtrator; 12, fuel tank; 13, position-detection sensor; 14, the first tensimeter; 141, the second tensimeter; 142, the 3rd tensimeter; 15, the first pressure transducer; 151, the second pressure transducer.
Embodiment
Be described in detail below in conjunction with the travelling belt fatigue test device of accompanying drawing to the embodiment of the present invention.
Fig. 1 is the structural representation of travelling belt fatigue test device of the present invention, and this travelling belt fatigue test device can be used for the fatigue behaviour of the travelling belt tested in various applied environment, such as wind generating set pitch control cog belt.Certainly, this proving installation can also be used for carrying out testing fatigue to the conveyer chain in other applied environments.
As shown in Figure 1, this travelling belt fatigue test device comprises test board (not shown), drive system and load system.Wherein, the two ends of tested travelling belt are fixedly installed on test board, and test board can be driven to rotate around the axis.Drive system comprises oil motor 3 and motor driving part, and oil motor 3 is connected with travelling belt, and drives conveyer belt, and motor driving part is connected with oil motor 3, and drives oil motor 3 to rotate.Load system comprises and is connected on test board and is positioned at the assist control going out oil pressure the first load piston cylinder 9 of rotating shaft both sides and the second load piston cylinder 91, first load piston cylinder 9 and the second load piston cylinder 91 being connected with the rodless cavity of control first load piston cylinder 9 and the rodless cavity of the second load piston cylinder 91.
In the present embodiment, this travelling belt fatigue test device utilizes motor driving part to drive oil motor 3 to rotate, travelling belt is driven to rotate by oil motor 3, travelling belt then drives test board to rotate around the axis, in test board rotation process, one, the piston rod being connected to the first load piston cylinder 9 on test board and the second load piston cylinder 91 stretches out, and another is retracted (the such as piston rod of the first load piston cylinder 9 stretch out while the piston rod of the second load piston cylinder 91 retract).The piston rod of the first load piston cylinder 9 only needs overcome friction when stretching out, and acting force is very little; The piston rod of the second load piston cylinder 91 needs the pressure of the pressure medium overcome in rodless cavity when retracting, its acting force be subject to is larger, this acting force can act on test board, form the resistance stoping and test board is rotated, this drag effect final, on tested travelling belt, forms the load of travelling belt.Travelling belt can be considered the run with load of travelling belt with the process that oil motor 3 rotates, and can test out the fatigue lifetime of travelling belt in the process.What can regulate the rodless cavity of the rodless cavity of the first load piston cylinder 9 and the second load piston cylinder 91 by regulating assist control goes out oil pressure, and then the load on control travelling belt, the working environment of travelling belt can be simulated exactly, realize reliably testing efficiently, and ensure measuring accuracy.
Preferably, between the rodless cavity of the first load piston cylinder 9 and fuel tank 12, be connected with the first fuel-displaced branch road, between the rodless cavity of the second load piston cylinder 91 and fuel tank 12, be connected with the second fuel-displaced branch road.Assist control comprises the first surplus valve 7 be arranged on the first fuel-displaced branch road and the second surplus valve 71 be arranged on the second fuel-displaced branch road.Control out oil pressure by surplus valve simple and reliable, and easy to adjust, easily ensure degree of regulation.
When the piston rod of the first load piston cylinder 9 is retracted, the pressure of the pressure medium in its rodless cavity increases rapidly, and when this force value reaches the oil pressure relief of the first surplus valve 7, pressure medium flows back to fuel tank 12 by the first surplus valve 7.Now the tested test stand of the piston rod of the second load piston cylinder 91 drives pull-out, and the acting force that its needs overcome is less.What the oil pressure relief of the first surplus valve 7 equaled the first load piston cylinder 9 goes out oil pressure, the pressure of the pressure medium that the piston rod being the first load piston cylinder 9 will overcome, the test load of travelling belt can be considered as, therefore, the loading that can control travelling belt by the first surplus valve 7.In like manner, when the first load piston cylinder 9 is drawn out, when the second load piston cylinder 91 is by compression, the loading that can control travelling belt by the second surplus valve 71.
Preferably, first surplus valve 7 and the second surplus valve 71 are precursor overflow valve, assist control also comprises the first operation valve 8 and the second operation valve 81, first operation valve 8 is connected with the control mouth of the first surplus valve 7 and controls the oil pressure relief of the first surplus valve 7, and the second operation valve 81 is connected with the control mouth of the second surplus valve 71 and controls the oil pressure relief of the second surplus valve 71.The regulation and control of the oil pressure relief to the first surplus valve 7 and the second surplus valve 71 can be realized by the first operation valve 8 and the second operation valve 81, make to control simple thus and conveniently adjust oil pressure as required.
The oil pressure relief of the first surplus valve 7 can be controlled by the pressure controlling the first operation valve 8.Particularly, the first operation valve 8 and the second operation valve 81 are surplus valve.Be connected with the remote control mouth of the first surplus valve 7 (precursor overflow valve) with the oil-in of the first surplus valve 7: the first operation valve 8 for the first operation valve 8, oil-out is connected with fuel tank 12.When the piston rod of the first load piston cylinder 9 is retracted, pressure medium in its rodless cavity is pressed into the first surplus valve 7, its small portion pressure medium, through the leader channel of the first surplus valve 7 inside, flows to the first operation valve 8 of the oil pressure relief for controlling the first surplus valve 7.When the pressure of this pressure medium is lower, when not reaching the set pressure of the first operation valve 8, the first operation valve 8 is closed, and the first surplus valve 7 is in closed condition, and pressure medium does not flow to fuel tank 12 by the first surplus valve 7.When the pressure of this pressure medium is higher, when reaching the set pressure of the first operation valve 8, the first operation valve 8 is opened, and the first surplus valve 7 is in conducting state, and pressure medium can flow to fuel tank 12 by the first surplus valve 7.In like manner, the pressure by controlling the second operation valve 81 can control the oil pressure relief of the second surplus valve 71.
More preferably, in order to improve robotization, facilitate Long-distance Control, the first operation valve 8 and the second operation valve 81 are proportional pressure control valve, to make the control of the oil pressure relief to the first surplus valve 7 and the second surplus valve 71 convenient, and then realize the loading that controls quickly and easily travelling belt.Meanwhile, the first operation valve 8 and the second operation valve 81 are set to proportional pressure control valve, can its set pressure of Long-distance Control, and then realize Long-distance Control that travelling belt is loaded, to improve the testing efficiency to travelling belt fatigue behaviour.
The scheme that this first surplus valve 7, second surplus valve 71 matches with the first operation valve 8, second operation valve 81, because the first surplus valve 7, second surplus valve 71 is precursor overflow valve, be thus applicable to that load needed for travelling belt is comparatively large, the first load piston cylinder 9 and the larger travelling belt fatigue property test device of the second load piston cylinder 91 pressure medium flow.
More preferably, the first repairing branch road is connected with between the rodless cavity of the first load piston cylinder 9 and fuel tank 12, be connected with the second repairing branch road between the rodless cavity of the second load piston cylinder 91 and fuel tank 12, assist control also comprises the first repairing operation valve 6 of control first repairing branch road break-make and controls the second repairing operation valve 61 of the second repairing branch road break-make.
When the piston rod of the first load piston cylinder 9 stretches out, negative pressure is formed in its rodless cavity, first repairing operation valve 6 controls the first repairing branch road conducting, and the pressure medium in fuel tank 12 can flow in this rodless cavity by the first repairing operation valve 6, has supplemented the pressure medium in rodless cavity.Pressure medium in rodless cavity has supplemented, or first load piston cylinder 9 piston rod retract time, pressure medium in rodless cavity is forced out, and the first repairing operation valve 6 controls the first repairing branch road and closes, and the pressure medium in rodless cavity does not flow into fuel tank 12 by the first repairing operation valve 6.Can guarantee that this travelling belt fatigue test device can carry out loop test to travelling belt by this kind of mode, improve testing efficiency, and test automation.Second repairing operation valve 61 controls the mode of the second repairing branch road break-make, similar to the working method of the first repairing operation valve 6, does not repeat here.
First repairing operation valve 6 and the second repairing operation valve 61 are preferably retaining valve, to control the break-make of the first repairing branch road and the second repairing branch road more easily, make the pressure medium in fuel tank 12 can rapidly flow toward the rodless cavity of the first load piston cylinder 9 and the second load piston cylinder 91, and the pressure medium preventing in the first load piston cylinder 9 and the second load piston cylinder 91, flow to fuel tank 12 by the first repairing operation valve 6 and the second repairing operation valve 61, adopt retaining valve to control simple and reliable.It should be noted that, the first repairing operation valve 6 and the second repairing operation valve 61 also can be any valve that can satisfy the demand such as switch valve or solenoid directional control valve.
More preferably, the quantity of the first repairing operation valve 6 and the second repairing operation valve 61 is multiple (the first repairing operation valve 6 in figure and the quantity of the second repairing operation valve 61 are two), and its concrete quantity can be determined according to the first load piston cylinder 9 and the second load piston cylinder 91 pressure medium flow.The first load piston cylinder 9 and the second load piston cylinder 91 pressure medium flow larger time, pressure medium in fuel tank 12 can by multiple first repairing operation valves 6 and multiple second repairing operation valve 61, flow to the first load piston cylinder 9 and the second load piston cylinder 91 rapidly, guarantee thus to meet user demand.
More preferably, this travelling belt fatigue test device also comprises the first pressure transducer 15, second pressure transducer 151 and control module (not shown).Wherein, the first pressure transducer 15 is connected on the first fuel-displaced branch road, goes out oil pressure for what test the rodless cavity of the first load piston cylinder 9.Second pressure transducer 151 is connected on the second fuel-displaced branch road, goes out oil pressure for what test the rodless cavity of the second load piston cylinder 91.Control module is connected with the first pressure transducer 15 and the second pressure transducer 151, and control that assist control regulates the rodless cavity of the first load piston cylinder 9 and the second load piston cylinder 91 according to detected pressures go out oil pressure.
Particularly, control module can be connected with the first operation valve 8 and the second operation valve 81, according to the detected pressures of the first pressure transducer 15 and the second pressure transducer 151, control the oil pressure relief of the first surplus valve 7 and the second surplus valve 71, and then control the first load piston cylinder 9 and the second load piston cylinder 91 rodless cavity go out oil pressure, to realize the automatic control loaded travelling belt.
Conveniently staff directly observes out oil pressure, first fuel-displaced branch road and the second fuel-displaced branch road can also arrange the first tensimeter 14 and the second tensimeter 141, show the pressure of the pressure medium on the first fuel-displaced branch road and the second fuel-displaced branch road respectively, make staff can regulate the oil pressure relief of the first surplus valve 7 and the second surplus valve 71 according to the force value of its display, so control the first load piston cylinder 9 and the second load piston cylinder 91 rodless cavity go out oil pressure.
Certainly, in other embodiments, can the display device such as display screen be set, make it with the first pressure transducer 15 and the second pressure transducer 151 or control module are connected, and show the detected pressures that the first pressure transducer 15 and the second pressure transducer 151 detect.
More preferably, motor driving part comprises hydraulic pump 1 and reversal valve 2.Hydraulic pump 1 is connected with oil motor 3, for oil motor 3 fuel feeding.Reversal valve 2 is arranged between hydraulic pump 1 and oil motor 3, and for the flow direction of controlled pressure medium so that turning to of hydraulic control motor 3, reversal valve 2 comprises cut-off station, positive switching stations and reversion station.
When reversal valve 2 is in cut-off station, end between hydraulic pump 1 and oil motor 3, oil motor 3 does not work.When reversal valve 2 is in positive switching stations, the oil-out of hydraulic pump 1 is communicated with the first hydraulic fluid port 31 of oil motor 3, and the second hydraulic fluid port 32 of oil motor 3 is communicated with fuel tank 12, and oil motor 3 rotates forward and drives travelling belt to rotate forward.When reversal valve 2 is in reversion station, the oil-out of hydraulic pump 1 is communicated with the second hydraulic fluid port 32 of oil motor 3, and the first hydraulic fluid port 31 of oil motor 3 is communicated with fuel tank 12, and oil motor 3 reverses and drives travelling belt to reverse.
Oil motor 3 can also be connected with travelling belt by reductor, is with idling to move for controlling travelling belt under the rotating speed be applicable to.
Particularly, reversal valve 2 is three-position four-way electromagnetic directional valve, and it has P mouth, T mouth, A mouth and B mouth, the P mouth of reversal valve 2 is connected with the oil-out of hydraulic pump 1, T mouth is connected with fuel tank 12, and A mouth is connected with the first hydraulic fluid port 31 of oil motor 3, and B mouth is connected with the second hydraulic fluid port 32 of oil motor 3.When this solenoid directional control valve is in cut-off station, P mouth, T mouth, A mouth and B mouth all end.When being in positive switching stations, P mouth is communicated with A mouth, and T mouth is communicated with B mouth; When being in reversion station, P mouth is communicated with B mouth, and T mouth is communicated with A mouth.
Certainly, in other embodiments, reversal valve 2 can be that other can realize valve group or other valves of identical function.
More preferably, motor driving part also comprises the first safety valve 4 and the second safety valve 41, for the working pressure of hydraulic control motor 3, makes it under the hydraulic pressure of safety, carry out work.
Particularly, the import of the first safety valve 4 is connected with the A mouth of reversal valve 2, and the outlet of the first safety valve 4 is connected with fuel tank 12.When oil motor 3 rotates forward, if the working pressure of oil motor 3 is comparatively large, during safe pressure more than the first safety valve 4, unnecessary pressure medium can flow back to fuel tank 12 by the first safety valve 4.
The import of the second safety valve 41 is connected with the B mouth of reversal valve 2, and the outlet of the second safety valve 41 is connected with fuel tank 12.When oil motor 3 reverses, if the working pressure of oil motor 3 is comparatively large, during safe pressure more than the second safety valve 41, unnecessary pressure medium can flow to fuel tank 12 by the second safety valve 41.
More preferably, drive system also comprises the first Fill valve 5 and the second Fill valve 51, and for controlling the break-make of the repairing branch road between fuel tank 12 and oil motor 3, the first Fill valve 5 and the second Fill valve 51 are preferably retaining valve.
Concrete, the import of the first Fill valve 5 is connected with fuel tank 12, and outlet is connected with the first hydraulic fluid port 31 of oil motor 3.When working pressure in oil motor 3 is less, the first Fill valve 5 is in conducting state, and the pressure medium in fuel tank 12 can enter the first hydraulic fluid port 31 of oil motor 3 by the first Fill valve 5, carry out supplementary pressure medium to oil motor 3; When working pressure in oil motor 3 is larger, the first Fill valve 5 is in closed condition.The import of the second Fill valve 51 is connected with fuel tank 12, and the outlet of the second Fill valve 51 is connected with the second hydraulic fluid port 32 of oil motor 3, and its working method is similar to the working method of the first Fill valve 5, does not repeat here.
Hydraulic pump 1 and the connecting line of reversal valve 2 can also be provided with out oil control valve 52, the 3rd safety valve 42 and the 3rd tensimeter 142.Go out oil control valve 52 for when the pressure medium of hydraulic control pump 1 flows to reversal valve 2, the conducting of the outlet line of hydraulic control pump 1, and forbid that the pressure medium in reversal valve 2 flows to hydraulic pump 1.The oil-in of the 3rd safety valve 42 is connected with the oil-out of hydraulic pump 1, and oil-out is communicated with fuel tank 12, goes out oil pressure for hydraulic control pump 1.3rd tensimeter 142 goes out oil pressure for what show hydraulic pump 1, and staff can regulate the safe pressure of the 3rd safety valve 42 according to the display pressure of the 3rd tensimeter 142, so hydraulic control pump 1 go out oil pressure.
More preferably, travelling belt fatigue test device also comprises position-detection sensor 13, for detecting the extended position of the piston rod of the first load piston cylinder 9 and the second load piston cylinder 91, and by the extended position information transmission that detects to control module.The extended position information of control module receiving position detecting sensor 13 transmission, and switch station according to extended position information control reversal valve 2.
Particularly, if when reversal valve 2 is in positive switching stations, position-detection sensor 13 detects that the piston rod of the first load piston cylinder 9 and the second load piston cylinder 91 has stretched out or bounced back and puts in place, information is sent to control module, control reversal valve 2 by control module and be transformed into reversion station, hydraulic control motor 3 rotates round about, and the first load piston cylinder 9 and the second load piston cylinder 91 are moved round about.Material is thus formed the automatic cycle of the forward and reverse of oil motor 3, and drive travelling belt circulation to rotate and reverse, and then the piston rod controlling the first load piston cylinder 9 and the second load piston cylinder 91 cyclically stretches out or bounces back, thus achieve dynamic the moving in circles of Imitation conveyance band band idling.
In the process, control travelling belt cycle rotation when correct load, just whether can reach predetermined cycle index by detecting travelling belt, judging that whether the fatigue behaviour of travelling belt is qualified.If tested travelling belt ruptured before reaching predetermined cycle index, then judge that its fatigue behaviour is defective; If tested travelling belt reaches predetermined cycle index, then judge that its fatigue behaviour is qualified.
As a kind of embodiment, this travelling belt fatigue test device also comprises heating radiator 10 and/or filtrator 11.Heating radiator 10 can be arranged on the oil return branch road that drive system and load system be connected with fuel tank 12, and the pressure medium for convection current oil return box 12 is lowered the temperature.Filtrator can be arranged on fuel tank for passing in and out the oil circuit of pressure medium, for filtering the pressure medium in inlet and outlet of fuel channel, prevents impurity wherein to wear and tear element in this device.
The travelling belt fatigue test device of the embodiment of the present invention has following effect:
By drive systems cog belt cycle rotation, and the oil pressure relief of regulation relief valve regulates the loading force to travelling belt, effectively can simulate the actual condition of travelling belt, and then test out the fatigue behaviour of travelling belt efficiently and accurately;
This travelling belt fatigue test device compact conformation, reasonable in design, control accurately, fatigue property test can be carried out to travelling belt quickly and easily.
It may be noted that the needs according to implementing, all parts described can be split as more multi-part, also the part operation of two or more parts and parts can be combined into new parts, to realize object of the present invention in the application.
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; change can be expected easily or replace, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claim.
Claims (10)
1. a travelling belt fatigue test device, is characterized in that, comprising:
Test board, the two ends of tested travelling belt are fixedly installed on described test board, and described test board can be driven to rotate around the axis;
Drive system, the motor driving part that described drive system comprises oil motor (3) and drives described oil motor (3) to rotate, described oil motor (3) is connected with described travelling belt, and driving described conveyer belt, described motor driving part is connected with described oil motor (3);
Load system, described load system comprises and is connected on described test board and is positioned at the first load piston cylinder (9) and the second load piston cylinder (91) of described rotating shaft both sides, and described first load piston cylinder (9) and described second load piston cylinder (91) are connected with the assist control going out oil pressure controlling the rodless cavity of described first load piston cylinder (9) and the rodless cavity of described second load piston cylinder (91).
2. travelling belt fatigue test device according to claim 1, it is characterized in that, the first fuel-displaced branch road is connected with between the rodless cavity of described first load piston cylinder (9) and fuel tank (12), be connected with the second fuel-displaced branch road between the rodless cavity of described second load piston cylinder (91) and fuel tank (12), described assist control comprises the first surplus valve (7) be arranged on described first fuel-displaced branch road and the second surplus valve (71) be arranged on described second fuel-displaced branch road.
3. travelling belt fatigue test device according to claim 2, it is characterized in that, described first surplus valve (7) and described second surplus valve (71) are precursor overflow valve, described assist control also comprises the first operation valve (8) and the second operation valve (81), described first operation valve (8) is connected with the control mouth of described first surplus valve (7) and controls the oil pressure relief of described first surplus valve (7), described second operation valve (81) is connected with the control mouth of described second surplus valve (71) and controls the oil pressure relief of described second surplus valve (71).
4. travelling belt fatigue test device according to claim 1, it is characterized in that, the first repairing branch road is connected with between the rodless cavity of described first load piston cylinder (9) and fuel tank (12), be connected with the second repairing branch road between the rodless cavity of described second load piston cylinder (91) and fuel tank (12), described assist control also comprises the first repairing operation valve (6) controlling described first repairing branch road break-make and the second repairing operation valve (61) controlling described second repairing branch road break-make.
5. travelling belt fatigue test device according to claim 1, is characterized in that, described travelling belt fatigue test device also comprises:
First pressure transducer (15), its test described first load piston cylinder (9) rodless cavity go out oil pressure;
Second pressure transducer (151), its test described second load piston cylinder (91) rodless cavity go out oil pressure;
Control module, its be connected with described first pressure transducer (15) and described second pressure transducer (151) and control according to detected pressures that described assist control regulates the rodless cavity of described first load piston cylinder (9) and described second load piston cylinder (91) go out oil pressure.
6. travelling belt fatigue test device according to claim 1, is characterized in that, described drive division comprises:
Hydraulic pump (1), is connected with described oil motor (3) and to described oil motor (3) fuel feeding;
Reversal valve (2), it is arranged between described hydraulic pump (1) and described oil motor (3), and described reversal valve (2) comprises cut-off station, positive switching stations and reversion station,
When being in described cut-off station, between described hydraulic pump (1) and described oil motor (3), oil circuit ends, and oil motor (3) does not work;
When being in described positive switching stations, the oil-out of described hydraulic pump (1) is communicated with first hydraulic fluid port (31) of described oil motor (3), second hydraulic fluid port (32) of described oil motor (3) is communicated with fuel tank (12), and described oil motor (3) rotates forward;
When being in described reversion station, the oil-out of described hydraulic pump (1) is communicated with second hydraulic fluid port (32) of described oil motor (3), first hydraulic fluid port (31) of described oil motor (3) is communicated with described fuel tank (12), and described oil motor (3) reverses.
7. travelling belt fatigue test device according to claim 6, it is characterized in that, described reversal valve (2) is solenoid directional control valve (2), it has P mouth, T mouth, A mouth and B mouth, the P mouth of described reversal valve (2) is connected with the oil-out of described hydraulic pump (1), T mouth is connected with described fuel tank (12), A mouth is connected with first hydraulic fluid port (31) of described oil motor (3), B mouth is connected with second hydraulic fluid port (32) of described oil motor (3)
When being in described cut-off station, P mouth, T mouth, A mouth and B mouth all end;
When being in described positive switching stations, P mouth is communicated with A mouth, and T mouth is communicated with B mouth;
When being in described reversion station, P mouth is communicated with B mouth, and T mouth is communicated with A mouth.
8. travelling belt fatigue test device according to claim 7, it is characterized in that, described drive division also comprises the first safety valve (4) and second safety valve (41) of the working pressure for controlling described oil motor (3), the import of described first safety valve (4) is connected with the A mouth of described reversal valve (2), and the outlet of described first safety valve (4) is connected with described fuel tank (12); The import of described second safety valve (41) is connected with the B mouth of described reversal valve (2), and the outlet of described second safety valve (41) is connected with described fuel tank (12).
9. travelling belt fatigue test device according to any one of claim 1 to 8, it is characterized in that, described drive system also comprises the first Fill valve (5) and the second Fill valve (51), the import of described first Fill valve (5) is connected with fuel tank (12), and the outlet of described first Fill valve (5) is connected with first hydraulic fluid port (31) of described oil motor (3); The import of described second Fill valve (51) is connected with described fuel tank (12), and the outlet of described second Fill valve (51) is connected with second hydraulic fluid port (32) of described oil motor (3).
10. travelling belt fatigue test device according to claim 6, is characterized in that, described travelling belt fatigue test device also comprises:
Position-detection sensor (13), it detects the extended position of the piston rod of described first load piston cylinder (9) and described second load piston cylinder (91);
Control module, it receives the extended position information that described position-detection sensor (13) transmits, and controls described reversal valve (2) switching station according to described extended position information.
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| CN201510921146.4A CN105403404B (en) | 2015-12-11 | 2015-12-11 | Conveyer belt fatigue test device |
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| CN105403404B (en) | 2018-01-05 |
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