CN103643717A - Hydraulic walking test system and test method for hydraulic walking system of excavating machine - Google Patents
Hydraulic walking test system and test method for hydraulic walking system of excavating machine Download PDFInfo
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- CN103643717A CN103643717A CN201310685364.3A CN201310685364A CN103643717A CN 103643717 A CN103643717 A CN 103643717A CN 201310685364 A CN201310685364 A CN 201310685364A CN 103643717 A CN103643717 A CN 103643717A
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Abstract
The invention discloses a test method for a hydraulic walking system of an excavating machine. The test method comprises the steps as follows: detecting hydraulic pressure P21 of a first hydraulic fluid port and hydraulic pressure P22 of a second hydraulic fluid port of a first hydraulic motor of the hydraulic walking system, detecting flow Q1 of the first hydraulic fluid port of the first hydraulic motor, and detecting hydraulic pressure P1 of guide oil used for controlling the flow of the first hydraulic motor; during braking of the hydraulic walking system, adjusting the hydraulic pressure P21 of the first hydraulic fluid port and the hydraulic pressure P22 of the second hydraulic fluid port of the first hydraulic motor according to the detected P21 and P22 values to enable the values to be constant, controlling the hydraulic pressure P1 of the guide oil to change linearly according to the detected P1 value, and evaluating the maneuverability of the first hydraulic motor simultaneously according to the change linearity of the detected flow Q1 value of the first hydraulic fluid port of the first hydraulic motor. The invention further discloses a walking test system of the excavating machine corresponding to the method. With the adoption of the scheme, the maneuverability of the hydraulic walking system can be evaluated based on an actual working status of the hydraulic walking system.
Description
Technical field
The present invention relates to hydraulic technique field, particularly relate to a kind of walking hydraulic test system of excavator and the method for testing of hydraulic travel system thereof.
Background technology
Hydraulic travel system is one of crucial drive subsystem of excavator, and the reliability of its use and functional performance not only directly affect the applicability of excavator complete machine to operating mode, even can cause huge economic loss to client.Therefore performance test and the evaluation of hydraulic travel system are one of most important tasks of excavator performance test.And the superiority of hydraulic travel system is not only guaranteed by the element function of walk motor with hydraulic pressure, the matching performance that is simultaneously also subject to running motor and complete machine directly affects.For test and evaluating, method of testing about running gear not only will be considered the performance of element itself, more need to suit the various operating modes that relate in running gear actual moving process, could make sufficient evaluation to hydraulic travel system like this, for evaluation, improvement and the type selecting of running motor provide can reference foundation.The method of testing that only has the speed of travel and running deviation value in current national excavator test program, is only the inspection for the general functional performance of single individuality, is difficult to carry out comparativity and system relationship Journal of Sex Research.
Therefore, need to provide a kind of walking hydraulic test system of excavator and the method for testing of hydraulic travel system thereof, to address the above problem.
Summary of the invention
The invention provides a kind of walking hydraulic test system of excavator and the method for testing of hydraulic travel system thereof can solve in prior art and can not to hydraulic travel system, assess in conjunction with real work operation conditions the technical problem of test.
For solving the problems of the technologies described above, the technical scheme that the present invention adopts is: the method for testing that a kind of hydraulic travel system of excavator is provided, this method of testing comprises: the hydraulic pressure P21 of the first hydraulic fluid port and the hydraulic pressure P22 of the second hydraulic fluid port that detect the first hydraulic motor of hydraulic travel system, detect the flow Q1 of the first hydraulic fluid port of the first hydraulic motor, detect for controlling the hydraulic pressure P1 of the guide oil of the first hydraulic motor flow; When hydraulic travel system is braked, the hydraulic pressure P21 of the first hydraulic fluid port and the hydraulic pressure P22 of the second hydraulic fluid port that according to the value of the P21 detecting and P22, adjust the first hydraulic motor make the two all constant, and that according to the value of the P1 detecting, controls that the linearity that the hydraulic pressure P1 linear change of guide oil changes according to the value of the flow Q1 of the first hydraulic fluid port of the first hydraulic motor detecting simultaneously assesses the first hydraulic motor can be handling.
Wherein, method of testing further comprises: the flow Q2 that detects the second hydraulic fluid port of the first hydraulic motor; In the first hydraulic motor operation process, by the value of (Q2-Q1)/Q1, assess the dredge oil amount of the first hydraulic motor.
Wherein, method of testing further comprises: detect the first hydraulic motor drain tap draining pressure and compare to assess the complete machine matching of the first hydraulic motor with predetermined draining pressure criteria value.
Wherein, method of testing further comprises: excavator is under various operating modes time, the first hydraulic fluid port hydraulic pressure P21 of the first hydraulic motor detecting and the peak value of the second hydraulic fluid port hydraulic pressure P22 and default pressure peak are compared, if be less than default pressure peak be evaluated as qualified.
Wherein, method of testing further comprises: the hydraulic pressure P31 of the first hydraulic fluid port and the hydraulic pressure P32 of the second hydraulic fluid port that detect the second hydraulic motor of hydraulic travel system; When the first hydraulic motor and the second hydraulic motor turn round simultaneously, by the difference P31-P21 of the first hydraulic fluid port hydraulic pressure of the first hydraulic fluid port hydraulic pressure of the second hydraulic motor and the first hydraulic motor and the first preset difference value comparison, by the difference P32-P22 of the second hydraulic fluid port hydraulic pressure of the second hydraulic fluid port hydraulic pressure of the second hydraulic motor and the first hydraulic motor and the second preset difference value comparison, if P31-P21 is less than the first preset difference value or P32-P22 is less than the second preset difference value, it is qualified to be evaluated as.
For solving the problems of the technologies described above, another technical solution used in the present invention is: a kind of walking hydraulic test system is provided, this walking hydraulic test system comprises: operated control valve group, the first motor control valve, the first hydraulic motor, the first load pressure control valve group, the first guide oil pressure sensor, the first motor pressure sensor, the second motor pressure sensor, the first motor flow transmitter and control module, thereby operated control valve group controls for exporting guide oil the flow Q1 of the first hydraulic fluid port and the flow Q2 of the second hydraulic fluid port that the first motor control valve is controlled the first hydraulic motor, the first load pressure control valve group is for regulating pressure P 21 and the P22 of two hydraulic fluid ports of the first hydraulic motor, the first guide oil pressure sensor is for detection of the hydraulic pressure P1 of the guide oil of operated control valve group output, the first motor pressure sensor and the second motor pressure sensor are respectively used to detect the hydraulic pressure P21 of the first hydraulic fluid port and the hydraulic pressure P22 of the second hydraulic fluid port of the first hydraulic motor, the first motor flow transmitter is for detection of the flow Q1 of the first hydraulic fluid port of the first hydraulic motor, control module regulates the pressure P 21 of two hydraulic fluid ports of the first hydraulic motor and the hydraulic pressure P1 of the guide oil of P22 and the output of control action control valve group for controlling the first load pressure control valve group.
Wherein, walking hydraulic test system also comprises the second motor flow transmitter, and the second motor flow transmitter is for detection of the flow Q2 of the second hydraulic fluid port of the first hydraulic motor.
Wherein, walking hydraulic test system also comprises the first draining pressure sensor, and the first draining pressure sensor is for detection of the draining pressure of the drain tap of the first hydraulic motor.
Wherein, thus control module for the operation of operator under the various operating modes of the guide oil pressure Walk Simulation hydraulic test system of control action control valve group output.
Wherein, walking hydraulic test system also comprises: the second hydraulic motor, the second motor control valve, the 3rd motor pressure sensor, the 4th motor pressure sensor and the second load pressure control valve group, thus operated control valve group also controls for exporting guide oil the flow Q3 of the first hydraulic fluid port and the flow Q4 of the second hydraulic fluid port that the second motor control valve is controlled the second hydraulic motor; The 3rd motor pressure sensor and the 4th motor pressure sensor are respectively used to detect the hydraulic pressure P31 of the first hydraulic fluid port and the hydraulic pressure P32 of the second hydraulic fluid port of the second hydraulic motor, and the second load pressure control valve group is for regulating pressure P 31 and the P32 of two hydraulic fluid ports of the second hydraulic motor.
The invention has the beneficial effects as follows: the situation that is different from prior art, the present invention is by arranging the first hydraulic fluid port of control module control load pressure-regulating valve regulator solution pressure motor and the pressure of the second hydraulic fluid port, control module control action control valve group is set to be regulated for controlling the flow of the guide oil of the first hydraulic motor flow, when the braking of walking hydraulic test system, the hydraulic pressure P21 of the first hydraulic fluid port and the hydraulic pressure P22 of the second hydraulic fluid port that according to the value of the P21 detecting and P22, adjust the first hydraulic motor make the two all constant, that according to the value of the P1 detecting, controls that the linearity that the hydraulic pressure P1 linear change of this guide oil changes according to the value of the flow Q1 of the first hydraulic fluid port of the first hydraulic motor detecting simultaneously assesses described the first hydraulic motor can be handling, can be handling thereby the practical working situation that can suit the hydraulic test system of walking is assessed it.
Accompanying drawing explanation
Fig. 1 is hydraulic circuit principle and the electric control principle schematic diagram of preferred embodiment of the walking hydraulic test system of excavator of the present invention;
Fig. 2 is the walking hydraulic test system of the excavator of the present invention corresponding lever operated signal of telecommunication schematic diagram of hydraulic control in control module when operating mode 1-6;
Fig. 3 is the walking hydraulic test system of the excavator of the present invention corresponding lever operated signal of telecommunication schematic diagram of hydraulic control in control module when operating mode 7-10;
Fig. 4 is the flow chart of preferred embodiment of method of testing of the hydraulic travel system of excavator of the present invention;
Fig. 5 is the flow chart of another preferred embodiment of method of testing of the hydraulic travel system of excavator of the present invention.
The specific embodiment
Below in conjunction with drawings and Examples, the present invention will be described in detail.
Refer to Fig. 1, Fig. 1 is hydraulic circuit principle and the electric control principle schematic diagram of preferred embodiment of the walking hydraulic test system of excavator of the present invention.In the present embodiment, walking hydraulic test system preferably includes: hydraulic oil container 10, prime mover M, the first main pump 11, the second main pump 12, pioneer pump 13, the first motor control valve 14, the second motor control valve 15, operated control valve group 16, the first hydraulic motor 17, the second hydraulic motor 18, the first load pressure control valve group 19, the second load pressure control valve group 20, the first guide oil pressure sensor 21, the second guide oil pressure sensor 22, the 3rd guide oil pressure sensor 23, the 4th guide oil pressure sensor 24, the first motor pressure sensor 25, the second motor pressure sensor 26, the 3rd motor pressure sensor 27, the 4th motor pressure sensor 28, the first motor flow transmitter 29, the second motor flow transmitter 30, the 3rd motor flow transmitter 31, the 4th motor flow transmitter 32, the first draining pressure sensor 33, the second draining pressure sensor 34, the first motor rotary speed sensor 35, the second motor rotary speed sensor 36, emergent control module 37, control module 38 and alarm 39.
It should be noted that, in other embodiments, walking hydraulic test system can not arrange related elements according to actual needs yet, for example in other embodiments, if only test 17 of the first hydraulic motors, the second hydraulic motor or relative testing element and control element can be set, if only test similarly 18 of the second hydraulic motors, the first hydraulic motor or relative testing element and control element can be set, in other embodiments, detecting element with parameter correlation can also be set according to actual conditions when not needing to test some parameter, the present embodiment does not limit this.
The first main pump 11 and the second main pump 12 are converted to hydraulic energy by the mechanical energy of prime mover M and are respectively used to as driving the first hydraulic motor 17 and the second hydraulic motor 18, and pioneer pump 13 is used to operated control valve group 16 that pressure oil is provided.Preferably, the first hydraulic motor 17 and the second hydraulic motor 18 are respectively left running motor 17 and the right running motor 18 of walking hydraulic test system.
The oil-in of the first main pump 11 connects hydraulic oil container 10, the oil-in of the first motor control valve 14 connects the oil-out of the first main pump 11, the first actuator port of the first motor control valve 14 connects the first hydraulic fluid port of the first hydraulic motor 17, the second actuator port of the first motor control valve 14 connects the second hydraulic fluid port of the first hydraulic motor 17, and the oil return opening of the first motor control valve 14 connects hydraulic oil container 10.
The oil-in of the second main pump 12 connects hydraulic oil container 10, the oil-in of the second motor control valve 15 connects the oil-out of the second main pump 12, the first actuator port of the second motor control valve 15 connects the first hydraulic fluid port of the second hydraulic motor 18, the second actuator port of the second motor control valve 15 connects the second hydraulic fluid port of the second hydraulic motor 18, and the oil return opening of the second motor control valve 15 connects hydraulic oil container 10.
Thereby operated control valve group 16 is controlled the first motor control valve 14 control the first hydraulic fluid port of the first hydraulic motor 17 and flow Q1 and Q2 of the second hydraulic fluid port for exporting guide oil.
In the present embodiment, operated control valve group 16 comprises control valve A, control valve B, control valve C and control valve D, in the present embodiment, control valve A, control valve B, control valve C and control valve D are preferably type pilot ratio electromagnetic type pressure-control valve, can be also other control valves in other embodiments.The oil-in of control valve A, control valve B, control valve C and control valve D connects the oil-out of pioneer pump 13, the oil-out of control valve A and control valve B is connected respectively first guide's hydraulic fluid port and second guide's hydraulic fluid port of the first motor control valve 14, the oil-out of control valve C and control valve D is connected respectively first guide's hydraulic fluid port and second guide's hydraulic fluid port of the second motor control valve 15, and the oil return opening of control valve A, control valve B, control valve C and control valve D all connects hydraulic oil container 10.Control valve A controls the output flow of the first actuator port of the first motor control valve 14 (i.e. the flow Q1 of the first hydraulic fluid port of the first hydraulic motor 17) for exporting guide oil, control valve B controls the output flow of the second actuator port of the first motor control valve 14 (i.e. the flow Q2 of the second hydraulic fluid port of the first hydraulic motor 17) for exporting guide oil, control valve C controls the output flow of the first actuator port of the second motor control valve 15 (i.e. the flow Q3 of the first hydraulic fluid port of the second hydraulic motor 18) for exporting guide oil, control valve D controls the output flow of the second actuator port of the second motor control valve 15 (i.e. the flow Q4 of the second hydraulic fluid port of the second hydraulic motor 18) for exporting guide oil.
Control module 38 couples with operated control valve group 16, by the signal of telecommunication, control the pressure of the guide oil of control valve A, control valve B output, and then control the first actuator port of the first motor control valve 14 and the output flow of the second actuator port, control the flow Q1 of the first hydraulic fluid port and the flow Q2 of the second hydraulic fluid port of the first hydraulic motor 17, and then control the rotating speed of the first hydraulic motor 17 and turn to; Similarly, by the signal of telecommunication, control the pressure of the guide oil of control valve C, control valve D output, and then control the first actuator port of the second motor control valve 15 and the output flow of the second actuator port, control the flow Q3 of the first hydraulic fluid port and the flow Q4 of the second hydraulic fluid port of the second hydraulic motor 18, and then control the rotating speed of the second hydraulic motor 18 and turn to.In control module 38, store the lever operated signal of telecommunication of different operating modes, coordinate the operation of simulation operator in various actual conditions with operated control valve group 16.
The first guide oil pressure sensor 21 is connected between the oil-out of control valve A and first guide's hydraulic fluid port of the first motor control valve 14, the pressure P 1 of the guide oil of exporting for detection of control valve A, the second guide oil pressure sensor 22 is connected between the oil-out of control valve B and second guide's hydraulic fluid port of the first motor control valve 14, the pressure P 2 of the guide oil of exporting for detection of control valve B, the 3rd guide oil pressure sensor 23 is connected between control valve C and first guide's hydraulic fluid port of the second motor control valve 15, the pressure P 3 of the guide oil of exporting for detection of control valve C, the 4th guide oil pressure sensor 24 is connected between control valve D and second guide's hydraulic fluid port of the second motor control valve 15, the pressure P 4 of the guide oil of exporting for detection of control valve D.
The first motor flow transmitter 29 is connected to the first actuator port of the first motor control valve 14, flow Q1 for detection of the first hydraulic fluid port of the first hydraulic motor 17, the second motor flow transmitter 30 is connected to the second actuator port of the first motor control valve 14, flow Q2 for detection of the second hydraulic fluid port of the first hydraulic motor 17, the 3rd motor flow transmitter 30 is connected to the first actuator port of the second hydraulic motor 18, flow Q3 for detection of the first hydraulic fluid port of the second hydraulic motor 18, the 4th motor flow transmitter 31 is connected to the second actuator port of the second motor control valve 15, flow Q4 for detection of the second hydraulic fluid port of the second hydraulic motor 18.
The first load pressure control valve group 19 is for regulating pressure P 21 and the P22 of two hydraulic fluid ports of described the first hydraulic motor 17.
In the present embodiment, the first load pressure control valve group 19 is for regulating the first hydraulic fluid port of the first hydraulic motor 17 and the pressure of the second hydraulic fluid port.The second load pressure control valve group 20 is for regulating the first hydraulic fluid port of the second hydraulic motor 18 and the pressure of the second hydraulic fluid port.Particularly, the first load pressure control valve group 19 comprises that pressure regulates electrically-controlled valve E and pressure to regulate electrically-controlled valve F, the first hydraulic fluid port of pressure-regulating valve E connects the first hydraulic fluid port of the first hydraulic motor 17, the second hydraulic fluid port of pressure-regulating valve E connects the second hydraulic fluid port of the first hydraulic motor 17, the first hydraulic fluid port of pressure-regulating valve F connects the second hydraulic fluid port of the first hydraulic motor 17, and the second hydraulic fluid port of pressure-regulating valve F connects the first hydraulic fluid port of the first hydraulic motor 17; Similarly, the second load pressure control valve group 20 comprises pressure-regulating valve G and pressure-regulating valve H, the first hydraulic fluid port of pressure-regulating valve G connects the first hydraulic fluid port of the second hydraulic motor 18, the second hydraulic fluid port of pressure-regulating valve G connects the second hydraulic fluid port of the second hydraulic motor 18, the first hydraulic fluid port of pressure-regulating valve H connects the second hydraulic fluid port of the second hydraulic motor 18, and the second hydraulic fluid port of pressure-regulating valve H connects the first hydraulic fluid port of the second hydraulic motor 18.
Control module 38 regulates the pressure P 21 of two hydraulic fluid ports of the first hydraulic motor 17 and the hydraulic pressure P1 of the guide oil of P22 and 16 outputs of control action control valve group for controlling the first load pressure control valve group 19.Thereby control module 38 is for the operation of operator to operated control valve group 16 under the various operating modes of the hydraulic travel system of the guide oil pressure simulation excavator of control action control valve 16 outputs.
Control module 38 couples with the first load pressure control valve group 19 and the second load pressure control valve group 20 respectively, thereby controls the hydraulic pressure P21 of the first hydraulic fluid port of the first load pressure control valve group 19 and second load pressure control valve group 20 adjusting the first hydraulic motors 17 and the hydraulic pressure P31 of the first hydraulic fluid port and the hydraulic pressure P32 of the second hydraulic fluid port of the hydraulic pressure P22 of the second hydraulic fluid port and adjusting the second hydraulic motor 18 by the signal of telecommunication.Control module 38 stores the signal of telecommunication of excavator actual loading under different operating modes and simulates by controlling the first and second load pressure control valves the different loads being subject in the various actual conditions of the first and second hydraulic motors 18.
The first motor pressure sensor 25 is connected with the first hydraulic fluid port of the first hydraulic motor 17, hydraulic pressure P21 for detection of the first hydraulic fluid port of the first hydraulic motor 17, the second motor pressure sensor is connected with the second hydraulic fluid port of the first hydraulic motor 17, hydraulic pressure P22 for detection of the second hydraulic fluid port of the first hydraulic motor 17, the 3rd motor pressure sensor is connected with the first hydraulic fluid port of the second hydraulic motor 18, hydraulic pressure P31 for detection of the first hydraulic fluid port of the second hydraulic motor 18, the 4th motor pressure sensor is connected with the second hydraulic fluid port of the second hydraulic motor 18, hydraulic pressure P32 for detection of the second hydraulic fluid port of the second hydraulic motor 18.
The first draining pressure sensor 33 is connected between the drain tap and hydraulic oil container 10 of the first hydraulic motor 17, draining pressure for detection of the first hydraulic motor 17, the second draining pressure sensor 34 is connected between the drain tap and hydraulic oil container 10 of the second hydraulic motor 18, for detection of the draining pressure of the second hydraulic motor 18.
The first motor rotary speed sensor 35 is for detection of the rotating speed of the first hydraulic motor 17, and the second motor rotary speed sensor 36 is for detection of the rotating speed of the second hydraulic motor 18.
Emergent control module 37 is for when control module 38 breaks down, operated control valve group 16 is being controlled temporarily, and emergent control module 37 comprises knob A1, knob B1, knob C1, knob D1 and emergency cut-off switch S.Knob A1 is used for controlling control valve A, and knob B1 is used for controlling control valve B, and knob C1 is used for controlling control valve C, and knob D1 is used for controlling control valve D.Emergency cut-off switch S is for the emergency shutdown of excavator.In other embodiments, walking hydraulic test system also can not comprise emergent control module 37.
Alarm 39 is connected with control module 38, and for the prompting before test and after test.In other embodiments, walking hydraulic test system also can not comprise alarm 39.
In the present embodiment, control module 38, alarm 39 and emergent control module 37 are all arranged in driver's cabin.
The automatic control action control valve group 16 of control module 38, completes the test action under each operating mode successively, and in course of action automatic acquisition and recording data.For example, operating mode has several as follows:
1. start-stop and switching operating mode (being divided into two kinds of operating modes of high/low speed).
2. the quick switching operating mode (being divided into two kinds of operating modes of high/low speed) of advancing-retreat.
3. height-low speed switches operating mode.
4. minor-circle turn operating mode (being divided into two kinds of operating modes of high/low speed).
5. monolateral turning operating mode (being divided into two kinds of operating modes of high/low speed).
6. drive operating mode (being divided into two kinds of operating modes of high/low speed) simultaneously.
7. ramp starts-stops and switching operating mode (being divided into two kinds of operating modes of high/low speed).
8. the ramp quick switching operating mode (being divided into two kinds of operating modes of high/low speed) of advancing-retreat.
9. the ramp slow operation operating mode (be divided into two kinds of operating modes of high/low speed, each operating mode is further divided into two kinds, up/down slope operating mode) of advancing.
10. ramp retreats slow operation operating mode (be divided into two kinds of operating modes of high/low speed, each operating mode is further divided into two kinds, up/down slope operating mode).
Refer to Fig. 2-Fig. 3, Fig. 2 is the walking hydraulic test system of the excavator of the present invention corresponding lever operated signal of telecommunication schematic diagram of hydraulic control in control module when operating mode 1-6, and Fig. 3 is the walking hydraulic test system of the excavator of the present invention corresponding lever operated signal of telecommunication schematic diagram of hydraulic control in control module when operating mode 7-10.
In control module 38, the forward motion that left lateral is sailed operating grip is replaced by control valve A, the backward movement that left lateral is sailed operating grip is replaced by control valve B, and the forward motion of right travel operating grip is replaced by control valve C, and the backward movement of right travel operating grip is replaced by control valve D.Can in advance above 10 kinds of test operating modes be prestored in control module 38, during running gear performance under need to testing certain operating mode, only need in control module 38, select corresponding operating mode, after operating mode is selected, when testing, control module 38 is first carried out security warning by alarm 39, after 5 seconds, control module 38 will be according to the regular automatic output analog current of above-described operation condition testing method, thereby control control valve A, B, C, the pressure that the regular output of D is different, realize and automatically control the content measurement that excavator completes walking hydraulic test system, and automatically record corresponding test data.Whole process is without manual operation and intervention.When control module 38 breaks down, can excavator be parked to home by emergent control module 37, or by emergency cut-off switch S, machine be stopped working and shut down, thereby guarantee experimental safe.
Refer to Fig. 4, Fig. 4 is the flow chart of preferred embodiment of method of testing of the hydraulic travel system of excavator of the present invention.
In the present embodiment, the method for testing of the hydraulic travel system of excavator comprises:
Step S11: the hydraulic pressure P21 of the first hydraulic fluid port and the hydraulic pressure P22 of the second hydraulic fluid port that detect the first hydraulic motor of hydraulic travel system, detect the flow Q1 of the first hydraulic fluid port of the first hydraulic motor, detect for controlling the hydraulic pressure P1 of the guide oil of the first hydraulic motor flow.
In step S11, for example with the first motor pressure sensor 25 in above-mentioned walking hydraulic test system preferred embodiment, detect the hydraulic pressure P21 of the first hydraulic fluid port of the first hydraulic motor 17, with the second hydraulic motor sensor 26, detect the hydraulic pressure P22 of the second hydraulic fluid port of the first hydraulic motor 17, with the first motor flow transmitter 29, detect the flow Q1 of the first hydraulic fluid port of the first hydraulic motor 17, the hydraulic pressure P1 detecting for the guide oil of the first hydraulic motor 17 flows with the first guide oil pressure sensor 21.In the present embodiment, the first hydraulic motor 17 and the second hydraulic motor 18 are respectively left running motor and the right running motor of excavator running gear.In the present embodiment, just preferably test the first hydraulic motor 17, and can be that the first hydraulic motor 17 and the second hydraulic motor 18 are tested simultaneously or only the second hydraulic motor 18 tested in other embodiments.
Step S12: when hydraulic travel system is braked, the hydraulic pressure P21 of the first hydraulic fluid port and the hydraulic pressure P22 of the second hydraulic fluid port that according to the value of the P21 detecting and P22, adjust the first hydraulic motor make the two all constant, and that according to the value of the P1 detecting, controls that the linearity that the hydraulic pressure P1 linear change of guide oil changes according to the value of the flow Q1 of the first hydraulic fluid port of the first hydraulic motor detecting simultaneously assesses the first hydraulic motor can be handling.
In step S12, for example, by control module 38, control pressure P 21 and the P22 that the first load pressure control valve group 19 regulates two hydraulic fluid ports of the first hydraulic motor 17, by control module 38 control action control valve groups 16, control the hydraulic pressure P1 linear change of guide oil, detailed says, for example, control module 38 is controlled guide oil pressure P 1 linear change of control valve A output, what the linearity that meanwhile, the value of the flow Q1 of the first hydraulic fluid port of the first hydraulic motor 17 of detecting of record changes was assessed the first hydraulic motor 17 can be handling.Similarly, in other embodiments, control module 38 is controlled guide oil pressure P 2 linear change of control valve B output, can detect by similar method the linearity of flow Q2 of the second hydraulic fluid port of the first hydraulic motor 17, equally, also can similarly test the second hydraulic motor 18, not repeat herein.
Step S13: the flow Q2 that detects the second hydraulic fluid port of the first hydraulic motor.
In step S13, for example, with the second motor flow transmitter 30, detect the flow Q2 of the second hydraulic fluid port of the first hydraulic motor 17.
Step S14: in the first hydraulic motor operation process, assess the dredge oil amount of the first hydraulic motor by the value of (Q2-Q1)/Q1.
In step S14, (Q2-Q1)/Q1 is preferably test passes when being less than 3%.
Step S15: detect the first hydraulic motor drain tap draining pressure and compare to assess the complete machine matching of the first hydraulic motor with predetermined draining pressure criteria value.
In step S15, draining pressure criteria value is 10bar, and it is qualified for example with the draining pressure that the first draining pressure sensor 33 detects the drain tap of the first hydraulic motor 17, being less than 10bar.
Step S16: when excavator is under various operating modes, the first hydraulic fluid port hydraulic pressure P21 of the first hydraulic motor detecting and the peak value of the second hydraulic fluid port hydraulic pressure P22 and default pressure peak are compared, if be less than default pressure peak be evaluated as qualified.
In step S16, for example by control module 38 control action control valve groups 16, simulate the various operating modes of excavator running gears, preset pressure peak value is preferably P=M1/M2*Pm, wherein M1 is the braking moment of the first hydraulic motor, M2 is the driving moment M2 of the first hydraulic motor, the flowing pressure that Pm is hydraulic travel system.
Step S17: the hydraulic pressure P31 of the first hydraulic fluid port and the hydraulic pressure P32 of the second hydraulic fluid port that detect the second hydraulic motor of hydraulic travel system.
Step S18: when the first hydraulic motor and the second hydraulic motor turn round simultaneously, by the difference P31-P21 of the first hydraulic fluid port hydraulic pressure of the first hydraulic fluid port hydraulic pressure of the second hydraulic motor and the first hydraulic motor and the first preset difference value comparison, by the difference P32-P22 of the second hydraulic fluid port hydraulic pressure of the second hydraulic fluid port hydraulic pressure of the second hydraulic motor and the first hydraulic motor and the second preset difference value comparison, if P31-P21 is less than the first preset difference value or P32-P22 is less than the second preset difference value, it is qualified to be evaluated as.
In step S18, the first preset difference value and the second preset difference value are all preferably 25bar.
It should be noted that above-described embodiment is the preferred embodiment of the method for testing of hydraulic travel system of the present invention, above-mentioned each step can rearrange and be combined to form new embodiment, at this, does not enumerate.
Refer to Fig. 5, Fig. 5 is the flow chart of another preferred embodiment of method of testing of the hydraulic travel system of excavator of the present invention.In the present embodiment, the method for testing of the hydraulic travel system of excavator comprises:
Step S21: the hydraulic pressure P21 of the first hydraulic fluid port and the hydraulic pressure P22 of the second hydraulic fluid port that detect the first hydraulic motor of hydraulic travel system, detect the flow Q1 of the first hydraulic fluid port of the first hydraulic motor, detect for controlling the hydraulic pressure P1 of the guide oil of the first hydraulic motor flow.
Step S22: when hydraulic travel system is braked, the hydraulic pressure P21 of the first hydraulic fluid port and the hydraulic pressure P22 of the second hydraulic fluid port that according to the value of the P21 detecting and P22, adjust the first hydraulic motor make the two all constant, and that according to the value of the P1 detecting, controls that the linearity that the hydraulic pressure P1 linear change of guide oil changes according to the value of the flow Q1 of the first hydraulic fluid port of the first hydraulic motor detecting simultaneously assesses the first hydraulic motor can be handling.
The present invention is by arranging the first hydraulic fluid port of control module control load pressure-regulating valve regulator solution pressure motor and the pressure of the second hydraulic fluid port, control module control action control valve group is set to be regulated for controlling the flow of the guide oil of the first hydraulic motor flow, when hydraulic travel system is braked, the hydraulic pressure P21 of the first hydraulic fluid port and the hydraulic pressure P22 of the second hydraulic fluid port that according to the value of the P21 detecting and P22, adjust the first hydraulic motor make the two all constant, that according to the value of the P1 detecting, controls that the linearity that the hydraulic pressure P1 linear change of this guide oil changes according to the value of the flow Q1 of the first hydraulic fluid port of the first hydraulic motor detecting simultaneously assesses described the first hydraulic motor can be handling, can be handling thereby the practical working situation that can suit hydraulic travel system is assessed it.
The foregoing is only embodiments of the present invention; not thereby limit the scope of the claims of the present invention; every equivalent structure or conversion of equivalent flow process that utilizes manual of the present invention and accompanying drawing content to do; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (10)
1. a method of testing for the hydraulic travel system of excavator, is characterized in that, described method of testing comprises:
Detect the hydraulic pressure P21 of the first hydraulic fluid port and the hydraulic pressure P22 of the second hydraulic fluid port of the first hydraulic motor of described hydraulic travel system, detect the flow Q1 of the first hydraulic fluid port of described the first hydraulic motor, detect for controlling the hydraulic pressure P1 of the guide oil of described the first hydraulic motor flow;
When described hydraulic travel system braking, the hydraulic pressure P21 of the first hydraulic fluid port and the hydraulic pressure P22 of the second hydraulic fluid port that according to the value of the P21 detecting and P22, adjust described the first hydraulic motor make the two all constant, and that according to the value of the P1 detecting, controls that the linearity that the hydraulic pressure P1 linear change of described guide oil changes according to the value of the flow Q1 of the first hydraulic fluid port of described the first hydraulic motor detecting simultaneously assesses described the first hydraulic motor can be handling.
2. method of testing according to claim 1, is characterized in that, described method of testing further comprises:
Detect the flow Q2 of the second hydraulic fluid port of described the first hydraulic motor;
In described the first hydraulic motor operation process, by the value of (Q2-Q1)/Q1, assess the dredge oil amount of described the first hydraulic motor.
3. method of testing according to claim 1, is characterized in that, described method of testing further comprises:
Detect described the first hydraulic motor drain tap draining pressure and compare to assess the complete machine matching of described the first hydraulic motor with predetermined draining pressure criteria value.
4. method of testing according to claim 1, is characterized in that, described method of testing further comprises:
Described excavator is under various operating modes time, the first hydraulic fluid port hydraulic pressure P21 of described the first hydraulic motor detecting and the peak value of the second hydraulic fluid port hydraulic pressure P22 and default pressure peak are compared, if be less than default pressure peak be evaluated as qualified.
5. according to the method for testing described in claim 1-4 any one, it is characterized in that, described method of testing further comprises:
Detect the hydraulic pressure P31 of the first hydraulic fluid port and the hydraulic pressure P32 of the second hydraulic fluid port of the second hydraulic motor of described hydraulic travel system;
When described the first hydraulic motor and the second hydraulic motor turn round simultaneously, by the difference P31-P21 of the first hydraulic fluid port hydraulic pressure of the first hydraulic fluid port hydraulic pressure of described the second hydraulic motor and described the first hydraulic motor and the first preset difference value comparison, by the difference P32-P22 of the second hydraulic fluid port hydraulic pressure of the second hydraulic fluid port hydraulic pressure of described the second hydraulic motor and described the first hydraulic motor and the second preset difference value comparison, if P31-P21 is less than described the first preset difference value or P32-P22 is less than described the second preset difference value, it is qualified to be evaluated as.
6. a walking hydraulic test system for excavator, is characterized in that, described walking hydraulic test system comprises:
Operated control valve group (16), the first motor control valve (14) and the first hydraulic motor (17), described operated control valve group (16) for exporting guide oil and controlling described the first motor control valve (14) thus control the flow Q1 of the first hydraulic fluid port and the flow Q2 of the second hydraulic fluid port of described the first hydraulic motor (17);
The first load pressure control valve group (19), the first guide oil pressure sensor (21), the first motor pressure sensor (25), the second motor pressure sensor (26), the first motor flow transmitter (29) and control module (38), described the first load pressure control valve group (19) is for regulating pressure P 21 and the P22 of two hydraulic fluid ports of described the first hydraulic motor (17), described the first guide oil pressure sensor (21) is for detection of the hydraulic pressure P1 of the guide oil of described operated control valve group (16) output, described the first motor pressure sensor (25) and the second motor pressure sensor (26) are respectively used to detect the hydraulic pressure P21 of the first hydraulic fluid port and the hydraulic pressure P22 of the second hydraulic fluid port of described the first hydraulic motor (17), described the first motor flow transmitter (29) is for detection of the flow Q1 of the first hydraulic fluid port of described the first hydraulic motor (17), described control module (38) regulates pressure P 21 and the P22 of two hydraulic fluid ports of described the first hydraulic motor (17) and the hydraulic pressure P1 that controls the described guide oil of described operated control valve group (16) output for controlling described the first load pressure control valve group (19).
7. walking hydraulic test system according to claim 6, it is characterized in that, described walking hydraulic test system also comprises the second motor flow transmitter (30), and described the second motor flow transmitter (30) is for detection of the flow Q2 of the second hydraulic fluid port of described the first hydraulic motor (17).
8. walking hydraulic test system according to claim 6, it is characterized in that, described walking hydraulic test system also comprises the first draining pressure sensor (33), and described the first draining pressure sensor (33) is for detection of the draining pressure of the drain tap of described the first hydraulic motor (17).
9. walking hydraulic test system according to claim 6, it is characterized in that, described control module (38) for controlling described operated control valve group (16) thus the guide oil pressure of output is simulated the operation of operator under the various operating modes of described hydraulic travel system.
10. according to the walking hydraulic test system described in claim 6-9 any one, it is characterized in that, described walking hydraulic test system also comprises:
The second hydraulic motor (18) and the second motor control valve (15), described operated control valve group (16) also for exporting that guide oil is controlled described the second motor control valve (15) thus the flow Q3 of the first hydraulic fluid port and the flow Q4 of the second hydraulic fluid port that control described the second hydraulic motor (18);
The 3rd motor pressure sensor (27), the 4th motor pressure sensor (28) and the second load pressure control valve group (20), described the 3rd motor pressure sensor (27) and the 4th motor pressure sensor (28) are respectively used to detect the hydraulic pressure P31 of the first hydraulic fluid port and the hydraulic pressure P32 of the second hydraulic fluid port of described the second hydraulic motor (18), and described the second load pressure control valve group (20) is for regulating pressure P 31 and the P32 of two hydraulic fluid ports of described the second hydraulic motor (18).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310685364.3A CN103643717B (en) | 2013-12-13 | 2013-12-13 | The walking hydraulic test system of excavator and the method for testing of hydraulic travel system thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310685364.3A CN103643717B (en) | 2013-12-13 | 2013-12-13 | The walking hydraulic test system of excavator and the method for testing of hydraulic travel system thereof |
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| CN103643717A true CN103643717A (en) | 2014-03-19 |
| CN103643717B CN103643717B (en) | 2016-04-06 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112268028A (en) * | 2020-10-19 | 2021-01-26 | 山推工程机械股份有限公司 | Road roller walking system and walking control method |
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| JP2012082953A (en) * | 2010-09-17 | 2012-04-26 | Daikin Industries Ltd | Hybrid type hydraulic device |
| CN102493974A (en) * | 2011-12-28 | 2012-06-13 | 中国人民解放军65185部队 | Hydraulic oil circuit suitable for tests of multiple kinds of hydraulic components |
| CN102787624A (en) * | 2011-05-19 | 2012-11-21 | 日立建机株式会社 | Information management system for construction machine |
| CN202579458U (en) * | 2012-04-19 | 2012-12-05 | 上海纳博特斯克液压有限公司 | Device for testing traveling motor |
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| JPH10331774A (en) * | 1997-05-29 | 1998-12-15 | Maruma Tekunika Kk | Energy recovery type hydraulic tester |
| JP2012082953A (en) * | 2010-09-17 | 2012-04-26 | Daikin Industries Ltd | Hybrid type hydraulic device |
| CN102787624A (en) * | 2011-05-19 | 2012-11-21 | 日立建机株式会社 | Information management system for construction machine |
| CN102493974A (en) * | 2011-12-28 | 2012-06-13 | 中国人民解放军65185部队 | Hydraulic oil circuit suitable for tests of multiple kinds of hydraulic components |
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| CN112268028A (en) * | 2020-10-19 | 2021-01-26 | 山推工程机械股份有限公司 | Road roller walking system and walking control method |
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| CN103643717B (en) | 2016-04-06 |
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