CN103032411B - A kind of large-scale veneer reeling machine hydraulic motor On-line Fault method of real-time and device - Google Patents
A kind of large-scale veneer reeling machine hydraulic motor On-line Fault method of real-time and device Download PDFInfo
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Abstract
A kind of large-scale veneer reeling machine hydraulic motor transmission On-line Fault method of real-time, comprises hydraulic drive part and micro-control part: hydraulic drive part comprises many group high-pressure oil pumps and Oil pump electrical machinery, electromagnetic relief valve and hydraulic motor, two-way plug-in valve and pipeline; Micro-control part comprises industrial computer, PLC, pressure sensor and bidirectional traffics detector and peripheral circuit; Oil pressure and flow detection by pressure sensor and bidirectional traffics monitor to hydraulic motor inlet and outlet of fuel channel also passed to PLC by signal, PLC passes to industrial computer again, with the standard parameter value comparison in industrial computer database, automatic alarm out of service while judging hydraulic motor fault. The invention solves the hydraulic motor transmission system failure can only be in judgement afterwards, problem that can not early warning, thus the reliability of veneer reeling machine and life-span are improved greatly.<!--1-->
Description
Technical field
The present invention relates to a kind of hydraulic motor transmission fault on-line real-time detection method and device, particularly oneLarge-scale veneer reeling machine hydraulic motor transmission On-line Fault method of real-time and device.
Background technology
Relevant large-scale veneer reeling machine main drive adopts fluid motor-driven, following patent documentation: application numberThe hydraulic transmission of 200520124804.9 large-scale veneer reeling machines, discloses large-scale veneer reeling machine hydraulic drive existingThe one of technology drives top working roll as main drive roll by many hydraulic motors simultaneously, and all the other working rolls areAuxiliary working roll; The another kind of prior art is that every working roll is connected and drives with a hydraulic motor respectively.Hydraulic control system provides power to hydraulic motor, and hydraulic system comprises Oil pump electrical machinery, high-pressure oil pump, and electromagnetism overflowsThe compositions such as stream valve, solenoid directional control valve, hydraulic control one-way valve, safety valve, pressure sensor, hydraulic services and fuel tank.
In the time that veneer reeling machine is worked, all bringing onto loads of all working rolls, for roll bending provides the hydraulic motor of moment of torsion frequentStart, and have shock loading, in the time that one or more hydraulic motor breaks down, the horse of breaking downReach and not only can not become power, can become on the contrary load, the power output of equipment is reduced. Simultaneously to driving sectionPart causes serious injury, and causes equipment to move. In prior art, can only judge this type of fault afterwards,Can not on-line monitoring and early warning, how in working order lower monitoring in real time, effectively trouble saving is the stable fortune of equipmentThe key of row is also a still unsolved difficult problem of currently available technology.
Summary of the invention
The object of this invention is to provide a kind of large-scale veneer reeling machine hydraulic motor On-line Fault method of real-time and dressPut, energy Real-Time Monitoring hydraulic motor working condition in equipment running process, when one or more hydraulic pressure whereinEnergy and alarm protection when motor breaks down, realized the stability that equipment moves thus, extends hydraulic pressure and establishIn standby service life, ensure man-machine safety.
In order to achieve the above object, technical scheme of the present invention is: a kind of large-scale veneer reeling machine hydraulic motor transmission thereforeBarrier on-line real time monitoring method, is characterized in that:
Comprise hydraulic drive part and micro-control part and monitor according to following steps:
Group high-pressure oil pumps and Oil pump electrical machinery thereof, first to fourth electromagnetism overflow more than described hydraulic drive part comprisesValve and first to fourth hydraulic motor, first to fourth two-way plug-in valve and pipeline; By many Oil pump electrical machineries respectivelyDrive many high-pressure oil pumps, by collaborating after first to fourth electromagnetic relief valve build-up pressure, then by two-wayInserted valve connects first to fourth hydraulic motor oil inlet and outlet simultaneously, the action change hydraulic oil of two-way plug-in valveFlow to, thereby complete the variation of first to fourth hydraulic motor rotation direction;
Described micro-control part comprises industrial computer, PLC, the first and second pressure sensors and first to fourthThe first to the 8th bidirectional traffics detector of installing on the oil inlet and outlet A of hydraulic motor and the oil circuit of B and peripheral electricityRoad; Industrial computer is for the setting of interface display and parameter, by pressure sensor to hydraulic motor oil inlet and outlet ADetect in real time and pass to PLC with B pressure change signal, bidirectional traffics detector is by the hydraulic oil detectingFlow signal is also passed to PLC, and PLC passes to industrial computer after to signal acquisition process, and industrial computer and PLC are by logicalThe mode of news is carried out communication;
Hydraulic motor transmission On-line Fault Real-Time Monitoring step: the pressure being detected by described pressure sensor andThe flow that two-way bidirectional traffics detector detects is converted into current signal and outputs to the analog acquisition mould of PLCPiece carries out computing; Then the flow detecting and pressure parameter are uploaded to industrial computer in real time, with industrial computerThe standard parameter value of the database the inside of middle foundation compares, and judges that whether hydraulic motor duty is normal,Be judged as and continue operation, automatic alarm out of service while being judged as fault when normal.
The invention has the beneficial effects as follows, by real-time detection and intelligence to veneer reeling machine flow rate of hydraulic system and pressureAnalyze, on-line automatic judgement operation conditions, is reported to the police and is protected by man-machine interface, has realized accurate control hydraulic pressureThe duty of motor, has ensured the stability of transmission. The present invention is reasonable in design, has solved hydraulic motor transmissionThe system failure can only be in judgement afterwards, problem that can not early warning, thereby make the reliability of veneer reeling machine and the life-span largeLarge raising.
Brief description of the drawings:
Fig. 1 is the structural representations of four hydraulic motors of the present invention while simultaneously driving a rotating machinery;
Fig. 2 is industrial computer of the present invention, PLC communication sampling structure figure;
Fig. 3 is hydraulic system structure schematic diagram of the present invention;
Fig. 4 is electric control system structure principle chart of the present invention;
Fig. 5 is fault decision flow chart of the present invention (motor forward);
Fig. 6 is fault decision flow chart of the present invention (motor reversion)
Detailed description of the invention:
Below in conjunction with brief description of the drawings the specific embodiment of the present invention:
Figure 1 shows that structural representation when four hydraulic motors drive a rotating machinery simultaneously. Four hydraulic motorsOutput shaft on four driving gears be installed be respectively A1, A2, A3, A4. Four driving gear A1, A2,A3, A4 drive again a driven gear A5 simultaneously. This is general, a typical many hydraulic motors whileDrive the situation of rotatable parts. The present invention does an explanation as example, and its protection domain is not subject to hydraulic motorThe restriction of concrete number of units.
Fig. 2 is industrial computer of the present invention, PLC communication sampling structure figure. This figure has introduced pressure and flow signal is logicalCross after PLC acquisition process, be uploaded to host computer by the mode of communication---industrial computer, simultaneously industrial computer alsoUnder the parameter of system setting, pass to and slave computer---PLC. PLC receives the instruction on guidance panel, by PLCOutput unit drive the electrical equipment work of peripheral hardware, thereby drive Oil pump electrical machinery and hydraulic valve bank action, more logicalThe change of crossing the hydraulic oil flow direction drives forward and reverse rotation of hydraulic motor.
Figure 3 shows that hydraulic system structure schematic diagram, mark in figure: fuel tank 1; High-pressure ball valve 2; Compensator3; Oil pump electrical machinery 4; High-pressure oil pump 5; In-line filter 6; First to fourth electromagnetic relief valve 7.a, 7.b,7.c, 7.d.; First to fourth check valve 8.a, 8.b, 8.c, 8.d; First to fourth two-way plug-in valve 9,10,11,12; The first pressure sensor 13a; The second pressure sensor 13b; The first to the 8th bidirectional trafficsDetector 14.a, 14.b, 14.c, 14.d, 14.e, 14.f, 14.g, 14.h; The first to the 8th balanceValve 15.a, 15.b, 15.c, 15.d, 15.e, 15.f, 15.g, 15.h; The first to the 8th bidirectional floodingValve 16.a, 16.b, 16.c, 16.d, 17.a, 17.b, 17.c, 17.d; The first oil path block 18a; SecondOil path block 18b; The 3rd oil path block 18c; First to fourth hydraulic motor 20.a, 20.b, 20.c, 20.d.When the parts of same structure are arranged in many group hydraulic motor lines respectively with a, b, c, d ... indicate.
Hydraulic drive part of the present invention comprises:
Four Oil pump electrical machineries 4 and high-pressure oil pump 5 direct connections, the inlet port of high-pressure oil pump 5 is by compensator 3, heightThe pipeline of pressure ball valve 2 connects with fuel tank 1; Fuel tank 1 has hydraulic oil, compensator 3 for reducing vibration and noise,Compensation is expanded with heat and contract with cold;
In-line filter 6, by threaded passage, connects high-pressure oil pump 5 and the first oil path block 18a; DescribedOne oil path block 18a is the cuboid piece of designed, designed, and Surface Finishing, has asphalt channel and screwed hole, passes throughScrew is fixed with first to fourth electromagnetic relief valve 7.a, 7.b, 7.c, 7.d and first to fourth list in planeTo valve 8.a, 8.b, 8.c, 8.d;
The first oil path block 18a and the second oil path block 18b connect by pipeline;
The second oil path block 18b is designed, designed, and structure is cuboid piece, and Surface Finishing is shown simultaneouslyFace electroplating processes. There are asphalt channel and screwed hole, for the circulation of hydraulic oil and the installation of valve member; In both sides pairTitle face respectively has 2 (having 4) fine finishining endoporus, described 4 group of first to fourth two-way plug-in valve 9,10,11,12 spool is plugged in 4 fine finishining endoporus of the second oil path block 18b; Described two groupOne pressure sensor 13a and the second pressure sensor 13b and the second oil path block 18b thread connection;
The first to the 8th bidirectional traffics detector 14.a, 14.b, 14.c, 14.d, 14.e, 14.f, 14.g,14.h connects the second oil path block 18b and the 3rd oil path block 18c by threaded passage;
The 3rd oil path block 18c is designed, designed, and structure is cuboid piece, Surface Finishing, have asphalt channel andScrewed hole, described the first to the 8th balanced valve 15.a, 15.b, 15.c, 15.d, 15.e, 15.f, 15.g,15.h, the first to the 8th bidirectional relief valve 16.a, 16.b, 16.c, 16.d, 17.a, 17.b, 17.c,17.d is fixed by screws in its plane;
Described first to fourth hydraulic motor 20.a, 20.b, 20.c, 20.d oil inlet and outlet A, B pass through spiral shellLine pipeline connects the 3rd oil path block 18c; Its drain tap T connects fuel tank 1 by threaded passage.
Start Oil pump electrical machinery 4, the hydraulic oil of the oil-out of high-pressure oil pump 5 filters through in-line filter 6,Ensure cleannes when hydraulic oil circulates in pipeline and Hydraulic Elements, at first to fourth electromagnetic relief valveWhen 7.a, 7.b, 7.c, 7.d must not electricity, hydraulic oil by first to fourth electromagnetic relief valve 7.a, 7.b,7.c, 7.d flow back to fuel tank 1; Obtain electric work at first to fourth electromagnetic relief valve 7.a, 7.b, 7.c, 7.dTime, hydraulic oil flows to the second oil path block 18b by first to fourth check valve 8.a, 8.b, 8.c, 8.d simultaneously;In the time that the second two-way plug-in valve 10 and the 3rd two-way plug-in valve 11 are switched on work, hydraulic oil is inserted by the second two-wayDress valve 10 flows out, and the first pressure sensor 13a detects the variation of the pressure of hydraulic motor oil-in, liquid in real timeThe oil-out of pressure motor flows back to and enters fuel tank through the 3rd two-way plug-in valve 11, simultaneously the second pressure sensor 13bDetect in real time the variation of the pressure of hydraulic motor oil-out; At this moment four hydraulic motors forward simultaneously; Otherwise, whenWhen the first two-way plug-in valve 9 and the 4th two-way plug-in valve 12 obtain electric work, hydraulic oil is by the 4th two-way plug-in mountingValve 12 flows out, and the second pressure sensor 13b detects the variation of the pressure of hydraulic motor oil-in, hydraulic pressure in real timeThe oil-out of motor flows back to and enters fuel tank through the first two-way plug-in valve 9, simultaneously the first pressure sensor 13aDetect in real time the variation of the pressure of hydraulic motor oil-out; At this moment four hydraulic motors reverse simultaneously; At the second oilOn the oil inlet and outlet of road piece 18b and the joining pipeline of the 3rd oil path block 18c, the first to the 8th bidirectional flow is installedAmount detector 14.a, 14.b, 14.c, 14.d, 14.e, 14.f, 14.g, 14.h; When the first hydraulic pressure horseWhile reaching 20.a forward, the second bidirectional traffics detector 14.b detects the flow of the first hydraulic motor 20.a import,The first bidirectional traffics detector 14.a detects the flow of the first hydraulic motor 20.a outlet; Other three secondFlow rate testing methods to the 4th hydraulic motor 20.b, 20.c, 20.d is the same with the first hydraulic motor 20.a,When forward, the 4th, the 6th and the 8th bidirectional traffics detector 14.d, 14.f, 14.h detect second, thirdWith the flow of the 4th hydraulic motor 20.b, 20.c, 20.d import, when reversion, the 3rd, the 5th and the 7th pairTo flow detector 14.c, 14.e, 14.g detect second, third and the 4th hydraulic motor 20.b, 20.c,The flow of 20.d import, 8 current signals that bidirectional traffics detector output electrical signals is 4～20mA; Work as liquidPressure motor when work the first to the 8th balanced valve 15.a, 15.b, 15.c, 15.d, 15.e, 15.f, 15.g,The opening pressure of 15.h is very low, is beneficial to flowing of hydraulic oil, reduces the pressure loss of hydraulic system; Work as hydraulic pressureWhen motor is not worked, balanced valve cuts out the oil-out of hydraulic motor, is beneficial to the rear braking of hydraulic motor rotationTime accurate location; Between balanced valve and hydraulic motor, be provided with the first to the 8th bidirectional relief valve 16.a,16.b, 16.c, 16.d, 17.a, 17.b, 17.c, 17.d, its effect is to stop at primer fluid pressure motorAfter rotation, braked rapidly, due to the first to the 8th balanced valve 15.a, 15.b, 15.c, 15.d, 15.e,15.f, 15.g, 15.h be in closed condition, because of the large reason of rotary inertia of the equipment of fluid motor-driven,There is the trend that drives hydraulic motor to continue rotation, due to closing of hydraulic motor oil-out balanced valve, hydraulic pressure like thisMotor oil-out pressure will increase, and in the time exceeding the set-pressure of overflow valve, the hydraulic oil of oil-out just passes throughOverflow valve flows to oil-in side, can well protect hydraulic motor, can be because of the hypertonia of oil-outHydraulic motor is damaged.
The course of work of hydraulic motor is as follows: start Oil pump electrical machinery, restart hydraulic motor forward, at this moment firstObtain electricly to the 4th electromagnetic relief valve 7.a, 7.b, 7.c, 7.d.a, 7.b, 7.c, 7.d, high pressure liquid force feed is logicalCross first to fourth check valve 8.a, 8.b, 8.c, 8.d and enter the second oil path block 18b, second and the 32Logical inserted valve 10,11 also conductings; The hydraulic oil circulation order of the first hydraulic motor 20.a is: the second two-way is insertedDress valve 10 → the second bidirectional traffics detector 14.b → the second balanced valve 15.b → the first hydraulic motor 20.a, →First balanced valve 15.a → the first bidirectional traffics detector 14.a → three two-way plug-in valve 11 → fuel tank 1; ?When hydraulic oil flows through the second bidirectional traffics detector 14.b and the first bidirectional traffics detector 14.a, bidirectional trafficsDetector and pressure sensor all send the current signal of a 4～20mA; Remaining hydraulic motor workJourney is the same; In the time that hydraulic fluid flow rate reaches the maximum stream flow of bidirectional traffics detector, the output of bidirectional traffics detectorFor 20mA current signal, the current signal of the variation of flow and bidirectional traffics detector output be one linearVariation relation, the variation that so just monitoring stream is crossed real-time traffic and the pressure of every hydraulic motor in real time,Whether just can real-time monitor every hydraulic motor by the variation of this flow and pressure breaks down.
Figure 4 shows that electric control system structure principle chart of the present invention. The turnover of the first hydraulic motor 20.aThe first and second bidirectional traffics detector 14.a that hydraulic fluid port A, B connect, the current signal that 14.b sends are respectivelyFor L14.a, L14.b; A, the B turnover of second, third and the 4th hydraulic motor 20.b, 20.c, 20.dThe current signal that sends of bidirectional traffics detector that hydraulic fluid port connects be respectively L14.c, L14.d, L14.e,L14.f, L14.g, L14.h; The first and second pressure sensor 13a, 13b equally also send 4～20mACurrent signal Y13a, Y13b; The current signal that bidirectional traffics detector and pressure sensor send is connected toPLC analog value collecting block S7-200-EM231, after the processing of the CPU of PLC, then is uploaded to host computerIndustrial computer processs and displays, simultaneously carry out the setting of systematic parameter at host computer industrial computer, and will arrangeUnder parameter, pass to PLC; Electric signal transmission and control are closed and are: when each hydraulic motor forward is normally workedTime, be at this moment connected to the current signal of the bidirectional traffics detector output of the oil-in B pipeline of hydraulic motorL14.b, L14.d, L14.f, L14.h are fixed values, in the time that hydraulic motor reverses, are connected to hydraulic pressure horseCurrent signal L14.a, the L14.c of the bidirectional traffics detector output of the oil-in A pipeline reaching, L14.e,L14.g is also a fixed value; Pressure signal is also a fixed value in the situation that load is identical simultaneously; ?These values, as the reference value of a standard, are set up a database and are kept at industrial computer the inside; When work withFlow, pressure under hydraulic motor real-time working state compare.
Judging while breaking down: the total flow that setting is supplied with four hydraulic motors by four high-pressure oil pumps is simultaneouslyQ is total; Setting hydraulic motor is forward working method. Determination methods is as follows:
There is phenomenon---the motor of " blocking " in one: four hydraulic motor of phenomenon one of them or several motorWhen stuck, there is such fault in the first hydraulic motor 20.a in the time of forward, flows to the first hydraulic motor 20.aFlow be just zero substantially, detection signal L14.b, L14.a that bidirectional traffics detector sends become bidirectional flowThe minimum output valve 4mA of amount detector; Flow to all the other second to the 4th hydraulic motor 20.b, 20.c, 20.dFlow will increase, and flow is that Q always/3 always/4 becomes Q in the time that hydraulic motor is all normally worked, at this moment two-wayDetection signal L14.c, L14.d, L14.e, L14.f, L14.g, L14.h that flow detector sends become large,Become 4/3 times of left and right of original value. The pressure of simultaneously supplying with other hydraulic motor also increases, and pressure sensor is sent outThe pressure signal going out also increases. In the time that hydraulic motor reverses, detection and determination methods are also as described above. OneWhen so similar fault appears in above motor, the signal that bidirectional traffics detector sends will be higher. SimultaneouslyThe pressure of supplying with other hydraulic motor also can be larger, the pressure that the first and second pressure sensor 13a, 13b sendForce signal Y13a, Y13b are also larger. When flow and the hydraulic motor of that or several hydraulic motors being detectedThe pressure of work is while changing, just can detect in real time that fault has appearred in which motor, in industry controlOn computer processed, report to the police, simultaneously out of service.
Phenomenon two: when one of them or several motor occur " puncturing " phenomenon---hydraulic oil is from hydraulic pressure horseReach oil-in A or B and directly flowed to drain tap T; While there is above-mentioned situation as the first hydraulic motor 20.a,Same the in the situation that of forward, flow to the first breakdown hydraulic motor 20.a because the reducing of resistance, hydraulic pressureThe oil second bidirectional traffics detector 14.b flow of flowing through will increase, and the current signal L14.b of its output alsoIncrease, and the flow of flow through the second to the 4th hydraulic motor 20.b, 20.c, 20.d can reduce same hydraulic pressureFlow through the 4th, the 6th, the 8th bidirectional traffics detector flow 14.d, 14.f, 14.h of oil also reduces, two-wayDetection signal L14.d, L14.f, L14.h that flow detector sends diminish, and flow to the pressure of hydraulic motor simultaneouslyPower also can diminish, and the pressure signal Y13b that the second pressure sensor 13b sends reduces. Judgement side when reversionMethod is same as above. When above-mentioned phenomenon appears in an above hydraulic motor, determination methods is with above-mentioned, according toAbove-mentioned detection method just can real time on-line monitoring hydraulic motor working condition.
When Fig. 5 is the present invention's the first hydraulic motor 20.a forward, fault judges flow process.
When Fig. 6 is the present invention's the first hydraulic motor 20.a reversion, fault judges flow process. Other second to the 4thThe fault judgment method of hydraulic motor 20.b, 20.c, 20.d is the same with the first hydraulic motor 20.a determination methods,The pressure signal that its first and second pressure sensor 13a, 13b detect is Y13a, Y13b, the 3rd to the 8thThe flow signal of bidirectional traffics detector 14.c, 14.d, 14.e, 14.f, 14.g, 14.h be L14.c,L14.d、L14.e、L14.f、L14.g、L14.h。
Claims (1)
1. a large-scale veneer reeling machine hydraulic motor transmission On-line Fault method of real-time, comprises hydraulic drive portionDivide and micro-control part, group high-pressure oil pump more than described hydraulic drive part comprises (5) and Oil pump electrical machineries (4) thereof,First to fourth electromagnetic relief valve (7.a, 7.b, 7.c, 7.d) and first to fourth hydraulic motor (20.a,20.b, 20.c, 20.d), first to fourth two-way plug-in valve (9,10,11,12) and pipeline; By manyOil pump electrical machinery (4) drives respectively many high-pressure oil pumps (5), by first to fourth electromagnetic relief valve (7.a, 7.b,7.c, 7.d) collaborate after build-up pressure, then connect first to fourth hydraulic pressure horse by two-way plug-in valve simultaneouslyReach (20.a, 20.b, 20.c, 20.d) oil inlet and outlet, the action of two-way plug-in valve changes the flow direction of hydraulic oil,Thereby complete the variation of first to fourth hydraulic motor (20.a, 20.b, 20.c, 20.d) rotation direction; Its featureBe:
Described micro-control part comprise industrial computer, PLC, the first and second pressure sensors (13a, 13b) andOn the oil inlet and outlet A of first to fourth hydraulic motor (20.a, 20.b, 20.c, 20.d) and the oil circuit of BThe first to the 8th bidirectional traffics detector of installing (14.a, 14.b, 14.c, 14.d, 14.e, 14.f, 14.g,14.h) and peripheral circuit; Industrial computer is for the setting of interface display and parameter, by pressure sensor to hydraulic pressure horseReach oil inlet and outlet A and B pressure change signal detects and pass to PLC in real time, bidirectional traffics detector will be examinedThe hydraulic fluid flow rate signal measuring is also passed to PLC, and PLC passes to industrial computer, industrial computer after to signal acquisition processCarry out communication with PLC by the mode of communication;
Hydraulic motor transmission On-line Fault Real-Time Monitoring step: the pressure being detected by described pressure sensor andThe flow that bidirectional traffics detector detects is converted into the analogue collection module that current signal outputs to PLC and entersRow computing; Then the flow detecting and pressure parameter are uploaded to industrial computer in real time, and build in industrial computerThe standard parameter value of vertical database the inside compares, and judges that whether hydraulic motor duty is normal, judgementContinue operation, automatic alarm out of service while being judged as fault when normal;
Described hydraulic drive part-structure is:
Four Oil pump electrical machineries (4) and high-pressure oil pump (5) direct connection, the inlet port of high-pressure oil pump (5) passes through shock-absorbingThe pipeline of larynx (3), high-pressure ball valve (2) connects with fuel tank (1); In-line filter (6) connects hydraulic oil by pipelinePump (5) and the first oil path block (18a); The first oil path block (18a) has asphalt channel and screwed hole, exists by screwPlane is fixed with first to fourth electromagnetic relief valve (7.a, 7.b, 7.c, 7.d) and first to fourth check valve(8.a, 8.b .8.c, 8.d); The first oil path block (18a) and the second oil path block (18b) pass through pipelineConnect;
The second oil path block (18b) has asphalt channel and screwed hole, for the circulation of hydraulic oil and the installation of valve member;Respectively there are 2 endoporus at bilateral symmetry face, the spool of first to fourth two-way plug-in valve (9,10,11,12)Be plugged in the endoporus of the second oil path block (18b); The first pressure sensor (13a) and the second pressure sensor(13b) with the second oil path block (18b) thread connection;
The first to the 8th bidirectional traffics detector (14.a, 14.b, 14.c, 14.d, 14.e, 14.f, 14.g,14.h) connect the second oil path block (18b) and the 3rd oil path block (18c) by pipeline; The 3rd oil path block (18c)There are asphalt channel and screwed hole, the first to the 8th balanced valve (15.a, 15.b, 15.c, 15.d, 15.e, 15.f,15.g, 15.h), the first to the 8th bidirectional relief valve (16.a, 16.b, 16.c, 16.d, 17.a, 17.b,17.c, 17.d) be fixed by screws in its plane;
First to fourth hydraulic motor (20.a, 20.b, 20.c, 20.d) oil inlet and outlet A, B pass through pipelineConnect the 3rd oil path block (18c); Its drain tap T connects fuel tank (1) by pipeline;
Oil circuit link relation: start Oil pump electrical machinery (4), the hydraulic oil process of the oil-out of high-pressure oil pump (5)In-line filter (6) filters, must not at first to fourth electromagnetic relief valve (7.a, 7.b, 7.c, 7.d)When electricity, hydraulic oil flows back to fuel tank (1) by first to fourth electromagnetic relief valve (7.a, 7.b, 7.c, 7.d);In the time that first to fourth electromagnetic relief valve (7.a, 7.b, 7.c, 7.d) obtains electric work, hydraulic oil is by firstFlow to the second oil path block (18b) to the 4th check valve (8.a, 8.b, 8.c, 8.d) simultaneously; When the second two-wayWhen inserted valve (10) and the 3rd two-way plug-in valve (11) energising work, hydraulic oil is by the second two-way plug-in valve(10) flow out and enter hydraulic motor, flowed back to through the 3rd two-way plug-in valve (11) by the oil-out of hydraulic motorEnter fuel tank (1), the first pressure sensor (13a) detects the variation of the pressure of hydraulic motor oil-in in real time,The second pressure sensor (13b) detects the variation of the pressure of hydraulic motor oil-out in real time simultaneously; At this moment fourHydraulic motor is forward simultaneously; Otherwise, when the first two-way plug-in valve (9) and the 4th two-way plug-in valve (12)When work in electricity,, hydraulic oil enters hydraulic motor by the 4th two-way plug-in valve (12) outflow, by hydraulic motorOil-out flows back to and enters fuel tank (1) through the first two-way plug-in valve (9), and at this moment four hydraulic motors are simultaneously anti-Turn; On the oil inlet and outlet of the second oil path block (18b) and the joining pipeline of the 3rd oil path block (18c), installHave the first to the 8th bidirectional traffics detector (14.a, 14.b, 14.c, 14.d, 14.e, 14.f, 14.g,14.h); In the time of the first hydraulic motor (20.a) forward, the second bidirectional traffics detector (14.b) detects theThe flow of one hydraulic motor (20.a) import, the first bidirectional traffics detector (14.a) detects the first hydraulic pressure horseReach the flow of (20.a) outlet; Other three second, third and the 4th hydraulic motors (20.b, 20.c,Flow rate testing methods 20.d) is with the first hydraulic motor (20.a), when forward, and the the 4th, the 6th and theEight bidirectional traffics detectors (14.d, 14.f, 14.h) detect second, third and the 4th hydraulic motor (20.b,20.c, 20.d) flow of import, when reversion, the 3rd, the 5th and the 7th bidirectional traffics detector (14.c,14.e, 14.g) detect the stream of second, third and the 4th hydraulic motor (20.b, 20.c, 20.d) importAmount, 8 current signals that bidirectional traffics detector output electrical signals is 4～20mA; In the time that hydraulic motor is workedFirst to the 8th balanced valve (15.a, 15.b, 15.c, 15.d, 15.e, 15.f, 15.g, 15.h) opensOpen pressure very low, be beneficial to flowing of hydraulic oil, reduce the pressure loss of hydraulic system; When hydraulic motor is not workedTime, balanced valve cuts out the oil-out of hydraulic motor, accurately determining while being beneficial to the rear braking of hydraulic motor rotationPosition; Between balanced valve and hydraulic motor, be provided with the first to the 8th bidirectional relief valve (16.a, 16.b, 16.c,16.d, 17.a, 17.b, 17.c, 17.d), its effect is rapid after primer fluid pressure motor stops the rotationBraked;
When hydraulic motor work, hydraulic oil flows to and Collection: start Oil pump electrical machinery, restart hydraulic pressure horseReach forward, at this moment first to fourth electromagnetic relief valve (7.a, 7.b, 7.c, 7.d) must be electric, high pressure liquid force feedEnter the second oil path block (18b), the second He by first to fourth check valve (8.a, 8.b, 8.c, 8.d)Also conducting of the 3rd two-way plug-in valve (10,11); The hydraulic oil circulation order of the first hydraulic motor (20.a) is:The second two-way plug-in valve (10) → second bidirectional traffics detector (14.b) → second balanced valve (15.b) →The first hydraulic motor (20.a) → first balanced valve (15.a) → first bidirectional traffics detectors (14.a) →The 3rd two-way plug-in valve (11) → fuel tank (1); Flow through the second bidirectional traffics detector (14.b) at hydraulic oilDuring with the first bidirectional traffics detector (14.a), bidirectional traffics detector and pressure sensor all send one 4～The current signal of 20mA; Remaining hydraulic motor course of work is the same; When hydraulic fluid flow rate reaches bidirectional trafficsWhen the maximum stream flow of detector, bidirectional traffics detector is output as 20mA current signal, the variation of flow and twoCurrent signal to flow detector output is a linear variation relation, and monitoring stream is crossed every hydraulic pressure in real timeThe real-time traffic of motor and the variation of pressure, real-time monitor every hydraulic motor by the variation of flow and pressureWhether break down;
Described micro-control part electric control system structure is: the oil inlet and outlet A of the first hydraulic motor (20.a),The current signal that the first and second bidirectional traffics detectors (14.a, 14.b) that B connects send is respectivelyL14.a, L14.b; A, the B turnover of second, third and the 4th hydraulic motor (20.b, 20.c, 20.d)The current signal that sends of bidirectional traffics detector that hydraulic fluid port connects be respectively L14.c, L14.d, L14.e,L14.f, L14.g, L14.h; The first and second pressure sensors (13a, 13b) equally also send 4～20Current signal Y13a, the Y13b of mA; The current signal that bidirectional traffics detector sends with pressure sensor is connectedAt PLC analog value collecting block S7-200-EM231, after the processing of the CPU of PLC, then be uploaded to upperMachine industrial computer processs and displays, and carries out the setting of systematic parameter, and will arrange at host computer industrial computer simultaneouslyParameter under pass to PLC; Electric signal transmission and control are closed and are: when the normal work of each hydraulic motor forwardWhile work, be at this moment connected to the current signal of the bidirectional traffics detector output of the oil-in B pipeline of hydraulic motorL14.b, L14.d, L14.f, L14.h are fixed values, in the time that hydraulic motor reverses, are connected to hydraulic pressure horseCurrent signal L14.a, the L14.c of the bidirectional traffics detector output of the oil-in A pipeline reaching, L14.e,L14.g is also a fixed value; Pressure signal is also a fixed value in the situation that load is identical simultaneously; ?These values, as the reference value of a standard, are set up a database and are kept at industrial computer the inside; When work withFlow, pressure under hydraulic motor real-time working state compare.
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| CN104340798A (en) * | 2013-07-31 | 2015-02-11 | 上海冶金矿山机械厂 | Self-diagnosis hydraulic brake circuit for elevator |
| CN103867532A (en) * | 2014-03-26 | 2014-06-18 | 上海电气液压气动有限公司 | Hydraulic test system of loading motor of railway tamping device |
| CN103967859B (en) * | 2014-05-23 | 2016-03-02 | 兰州兰石集团有限公司 | Control the closed type hydraulic system that four-roll plate bending machine top roll stablizes rotation |
| CN104163383B (en) * | 2014-08-13 | 2015-09-30 | 石家庄铁道大学 | Heavy engineering machine security monitored control system |
| CN110552932B (en) * | 2019-08-12 | 2021-08-31 | 长沙矿冶研究院有限责任公司 | Device and method for monitoring running state of motor of submarine crusher and crusher |
| CN113035561B (en) * | 2020-12-07 | 2022-11-22 | 广西电网有限责任公司电力科学研究院 | Oil pressure measurement-based transformer winding oil flow balance design method |
| CN113285654B (en) * | 2021-07-23 | 2021-09-24 | 山东辛丁技术有限公司 | Oil field petrochemical servo motor system based on fluid pressure actuating mechanism |
| CN114147737B (en) * | 2021-11-24 | 2023-04-18 | 广州多钛克机械科技有限公司 | Early warning method, system and medium for drainage robot and drainage robot |
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