CN103032411A - On-line real-time monitoring method and device for failure of hydraulic motor of large-sized plate bending roll - Google Patents
On-line real-time monitoring method and device for failure of hydraulic motor of large-sized plate bending roll Download PDFInfo
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- CN103032411A CN103032411A CN2012105944462A CN201210594446A CN103032411A CN 103032411 A CN103032411 A CN 103032411A CN 2012105944462 A CN2012105944462 A CN 2012105944462A CN 201210594446 A CN201210594446 A CN 201210594446A CN 103032411 A CN103032411 A CN 103032411A
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Abstract
The invention discloses an on-line real-time monitoring method for failure of a hydraulic motor of a large-sized plate bending roll. The on-line real-time monitoring method comprises a hydraulic transmission part and a micro control part, wherein the hydraulic transmission part comprises a plurality of groups of high-pressure oil pumps and an oil pump motor, an electromagnetic overflow valve and a hydraulic motor thereof, two-way cartridge valves and a pipeline; the micro control part comprises an industrial personal computer, a PLC (Programmable Logic Controller), a pressure sensor, a bidirectional flow detector and a peripheral circuit; oil pressures and flow rates of oil inlet and outlet paths of the hydraulic motor are detected, and signals are transmitted to the PLC by the pressure sensor and the bidirectional flow detector, are then transmitted to the industrial personal computer by the PLC and are compared with standard parameter values in an industrial personal computer database; and an alarm is automatically sent out and the operation is stopped when the failure of the hydraulic motor is judged. According to the on-line real-time monitoring method, the problem that the failure of a transmission system of the hydraulic motor can only be judged afterwards and cannot be warned early is solved, so that the reliability of the plate bending roll is greatly improved and the life of the plate bending roll is greatly prolonged.
Description
Technical field
The present invention relates to a kind of hydraulic motor transmission fault on-line real-time detection method and device, particularly a kind of large-scale plate bending rolls hydraulic motor transmission On-line Fault method of real-time and device.
Background technique
Relevant large-scale plate bending rolls main transmission adopts fluid motor-driven, following patent documentation: the hydraulic transmission of application number 200520124804.9 large-scale plate bending rollss, the a kind of of large-scale plate bending rolls hydraulic transmission prior art disclosed, namely drive simultaneously top working roll as main drive roll by many oil hydraulic motors, all the other work rolls are auxiliary work roll; The another kind of prior art is that every work roll is connected with an oil hydraulic motor respectively and drives.Hydraulic control system provides power to oil hydraulic motor, and hydraulic system comprises Oil pump electrical machinery, high pressure oil pump, the compositions such as electromagnetic relief valve, solenoid directional control valve, Pilot operated check valve, safety valve, pressure transducer, hydraulic services and fuel tank.
When plate bending rolls is worked, all work rolls are bringing onto load all, the oil hydraulic motor frequent starting of moment of torsion is provided for roll bending, and impulsive load arranged, when one or more oil hydraulic motor breaks down, the motor that breaks down not only can not become power, can become load on the contrary, and the output power of equipment is reduced.Simultaneously transmission part is caused serious injury, cause equipment to move.In the prior art, can only judge this type of fault afterwards, can not on-line monitoring and early warning, how descend in working order Real Time Monitoring, effective trouble saving is the key of equipment stable operation, also is a still unsolved difficult problem of present prior art.
Summary of the invention
The purpose of this invention is to provide a kind of large-scale plate bending rolls oil hydraulic motor On-line Fault method of real-time and device; energy Real-Time Monitoring oil hydraulic motor working condition in equipment running process; when wherein one or more oil hydraulic motor breaks down can and alarm and protection; realized thus the stability of equipment operation; prolong the working life of hydraulic equipment, guaranteed man-machine safety.
In order to achieve the above object, technological scheme of the present invention is: a kind of large-scale plate bending rolls hydraulic motor transmission On-line Fault method of real-time is characterized in that:
Comprise that hydraulic transmission part and micro-control partly and according to following steps monitor:
Described hydraulic transmission partly comprises many group high pressure oil pumps and Oil pump electrical machinery, electromagnetic relief valve and oil hydraulic motor, two-way plug-in valve and pipeline; Drive respectively many high pressure oil pumps by many Oil pump electrical machineries, by collaborating behind the electromagnetic relief valve build-up pressure, then connect simultaneously many oil hydraulic motor oil inlet and outlets by two-way plug-in valve, the action of two-way plug-in valve changes the flow direction of hydraulic oil, thereby finishes the variation of oil hydraulic motor rotation direction;
Described micro-control partly comprises process control machine, PLC, pressure transducer and two-way bidirectional traffics detector and the peripheral circuit installed at the oil circuit of the oil inlet and outlet A of every oil hydraulic motor and B; Process control machine is used for the setting of interface display and parameter, by pressure transducer oil hydraulic motor oil inlet and outlet A and B pressure change signal are detected and pass to PLC in real time, the bidirectional traffics monitor is also passed to PLC with the hydraulic fluid flow rate signal that detects, PLC passes to process control machine after to signal acquisition process, and process control machine and PLC carry out communication by the mode of communication;
Hydraulic motor transmission On-line Fault Real-Time Monitoring step: the flow that the pressure that is detected by described pressure transducer and two-way bidirectional traffics detector detect is converted into the analogue collection module that current signal outputs to PLC and carries out computing; Then flow and the pressure parameter that detects is uploaded to process control machine in real time, compare with the standard parameter value of the database the inside of setting up in the process control machine, judge whether the oil hydraulic motor working state is normal, be judged as and continue operation when normal, automatic alarm and out of service when being judged as fault.
The invention has the beneficial effects as follows; by real-time detection and the intellectual analysis to plate bending rolls flow rate of hydraulic system and pressure, on-line automatic judgement operation conditions is reported to the police and protection by man-machine interface; realize the working state of accurate control oil hydraulic motor, guaranteed the stability of transmission.The present invention is reasonable in design, and having solved the hydraulic motor transmission system failure can only judge afterwards, problem that can not early warning, thereby so that the reliability of plate bending rolls and life-span greatly improve.
Description of drawings:
Fig. 1 is the structural representations of four oil hydraulic motors of the present invention when driving a rotating machinery simultaneously;
Fig. 2 is process control machine 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 counter-rotating)
Embodiment:
Below in conjunction with description of drawings the specific embodiment of the present invention:
Figure 1 shows that the structural representation when four oil hydraulic motors drive a rotating machinery simultaneously.Four driving gears are installed on the output shaft of four oil hydraulic motors are respectively A1, A2, A3, A4.Four driving gear A1, A2, A3, A4 drive again a driven gear A5 simultaneously.This is a situation general, that typical many oil hydraulic motors drive rotatable parts simultaneously.The present invention does an explanation as example, and its protection domain is not subjected to the restriction of the concrete number of units of oil hydraulic motor.
Fig. 2 is process control machine of the present invention, PLC communication sampling structure figure.This figure has introduced pressure and flux signal by after the PLC collecting treatment, and the mode by communication is uploaded to upper-position unit---process control machine, and process control machine is also passing to and lower-position unit under the parameter of system's setting simultaneously---PLC.PLC receives the instruction on the operation panel, is driven the electrical equipment work of peripheral hardware by the output unit of PLC, thereby drives Oil pump electrical machinery and hydraulic valve bank action, and the change that flows to by hydraulic oil again drives forward and reverse rotation of oil hydraulic motor.
Figure 3 shows that the hydraulic system structure schematic diagram, mark among the figure: fuel tank 1; High-pressure ball valve 2; Compensator 3; Oil pump electrical machinery 4; High pressure oil pump 5; In-line filter 6; Electromagnetic relief valve 7; One-way valve 8; Two-way plug-in valve 9,10,11,12; Pressure transducer 13; Two-way bidirectional traffics detector 14; Equilibrium valve 15; Relief valve 16,17; Manifold block 18; Oil hydraulic motor 20.When the parts of same structure are installed in many group hydraulic motor lines respectively with a, b, c, d ... indicate.
Hydraulic transmission of the present invention partly comprises:
Four Oil pump electrical machineries 4 and high pressure oil pump 5 direct connections, the inlet port of high pressure oil pump 5 connects with fuel tank 1 by the pipeline of compensator 3, high-pressure ball valve 2; Fuel tank 1 has hydraulic oil, and compensator 3 is for reducing vibration and noise, and compensation is expanded with heat and contract with cold;
In-line filter 6 connects high pressure oil pump 5 and manifold block 18a by threaded passage; The cuboid piece that described manifold block 18a is designed, designed, surface finishing has asphalt channel and tapped hole, is fixed with electromagnetic relief valve 7 and one-way valve 8 on the plane by screw;
Manifold block 18a and manifold block 18b connect by pipeline;
Manifold block 18b is designed, designed, and structure is the cuboid piece, and surface finishing has been carried out the electroplating surface processing simultaneously.Asphalt channel and tapped hole are arranged, be used for the circulation of hydraulic oil and the installation of valve member; At the bilateral symmetry face 2 (having 4) fine finishing endoporus are arranged respectively, described 4 groups of two-way plug-in valves 9,10,11,12 spool are plugged in 4 fine finishing endoporus of manifold block 18b; Described two groups of pressure transducer 13a and 13b and manifold block 18b scyewed joint;
Manifold block 18c is designed, designed, and structure is the cuboid piece, and surface finishing has asphalt channel and tapped hole, and described equilibrium valve 15, relief valve 16,17 are fixed by screws on its plane;
Described oil hydraulic motor 20 oil inlet and outlet A, B connect manifold block 18c by threaded passage; Its drain tap T connects fuel tank 1 by threaded passage.
Start Oil pump electrical machinery 4, the hydraulic oil of the oil outlet of high pressure oil pump 5 filters through in-line filter 6, guarantee the turbidity test when hydraulic oil circulate in pipeline and hydraulic element, when electromagnetic relief valve 7 must not be electric, hydraulic oil flowed back to fuel tank 1 by electromagnetic relief valve 7; When electromagnetic relief valve 7 got electric work, hydraulic oil flow to manifold block 18b simultaneously by one-way valve 8a, 8b, 8c, 8d; When two-way plug-in valve 10 and 11 energising work, hydraulic oil flows out by two-way plug-in valve 10, pressure transducer 13a detects the variation of the pressure of oil hydraulic motor filler opening in real time, the oil outlet of oil hydraulic motor flows back to through two-way plug-in valve 11 and enters fuel tank, and pressure transducer 13b detects the variation of the pressure of oil hydraulic motor oil outlet in real time simultaneously; At this moment four oil hydraulic motors forwards simultaneously; Otherwise, when two-way plug-in valve 9 and 12 gets electric work, hydraulic oil flows out by two-way plug-in valve 12, pressure transducer 13b detects the variation of the pressure of oil hydraulic motor filler opening in real time, the oil outlet of oil hydraulic motor flows back to through two-way plug-in valve 9 and enters fuel tank, and pressure transducer 13a detects the variation of the pressure of oil hydraulic motor oil outlet in real time simultaneously; At this moment four oil hydraulic motors reverse simultaneously; Oil inlet and outlet and the joining pipeline of manifold block 18c at manifold block 18b are equipped with bidirectional traffics detector 14.a, 14.b, 14.c, 14.d, 14.e, 14.f, 14.g, 14.h; When oil hydraulic motor 20.a forward, two-way bidirectional traffics detector 14.b detects the flow of oil hydraulic motor 20.a import, and bidirectional traffics detector 14.a detects the flow of hydraulic pressure 20.a outlet; The flow rate testing methods of other three oil hydraulic motor 20.b, 20.c, 20.d is the same with oil hydraulic motor 20.a, during forward, bidirectional traffics detector 14.d, 14.f, 14.h detect the flow of oil hydraulic motor 20.b, 20.c, 20.d import, during counter-rotating, two-way bidirectional traffics detector 14.c, 14.e, 14.g detect the flow of oil hydraulic motor 18.b, 18.c, 18.d import, and 8 bidirectional traffics detector output electrical signals are the current signal of 4～20mA; The cracking pressure of equilibrium valve 15.a, 15.b, 15.c, 15.d, 15.e, 15.f, 15.g, 15.h is very low when oil hydraulic motor is worked, and is beneficial to flowing of hydraulic oil, reduces the pressure loss of hydraulic system; When oil hydraulic motor was not worked, equilibrium valve cut out the oil outlet of oil hydraulic motor, the accurate location when being beneficial to the rear braking of oil hydraulic motor rotation; Bidirectional relief valve 16.a is installed between equilibrium valve and oil hydraulic motor; 16.b; 16.c; 16.d; 17.a; 17.b; 17.c; 17.d; its effect is braked rapidly after the primer fluid pressure motor stops the rotation; because equilibrium valve 15a; 15.b; 15.c; 15.d; 15.e; 15.f; 15.g; 15.h all be in closed condition; the large reason of rotary inertia because of the equipment of fluid motor-driven; the trend that oil hydraulic motor continues rotation that drives is arranged; because closing of oil hydraulic motor oil outlet equilibrium valve; oil hydraulic motor oil outlet pressure will increase like this; when surpassing the Set pressure of relief valve; the high pressure oil of oil outlet just flows to the filler opening side by relief valve; can well protect oil hydraulic motor, oil hydraulic motor is damaged.
The working procedure of oil hydraulic motor is as follows: start Oil pump electrical machinery, restart the oil hydraulic motor forward, at this moment electromagnetic relief valve 7.a, 7.b, 7.c, 7.d get electricly, and the high pressure liquid force feed enters manifold block 18b by one-way valve 8.a, 8.b, 8.c, 8.d, also conducting of two-way plug-in valve 10,11; The hydraulic oil circulation of oil hydraulic motor 20.a sequentially is: two-way plug-in valve 10 → bidirectional traffics detector 14.b → equilibrium valve 15.b → oil hydraulic motor 20.a → equilibrium valve 15.a → bidirectional traffics detector 14.a → two-way plug-in valve 11 → fuel tank 1; When hydraulic oil flow through bidirectional traffics detector 14.b and 14.a, bidirectional traffics detector and pressure transducer all sent the current signal of 4～20 mA; Remaining oil hydraulic motor working procedure is the same; When hydraulic fluid flow rate reaches the peak rate of flow of bidirectional traffics detector, the bidirectional traffics detector is output as 20 mA current signals, the current signal of the variation of flow and the output of bidirectional traffics detector is the variation relation of a linearity, the so just in real time monitoring stream variation of crossing real-time traffic and the pressure of every oil hydraulic motor, whether the variation by this flow and pressure just can real-time monitor every oil hydraulic motor and break down.
Figure 4 shows that electric control system structure principle chart of the present invention.Bidirectional traffics detector 14 .a that import and export A, the B of oil hydraulic motor 20.a connects, the current signal that 14.b sends are respectively L14.a, L14.b; The current signal that the bidirectional traffics detector that the A of oil hydraulic motor 18.b, 18.c, 18.d, B import and export connect sends is respectively L14.c, L14.d, L14.e, L14.f, L14.g, L14.h; Pressure transducer 13a, 13b equally also send current signal Y13a, the Y13b of 4～20 mA; The current signal that bidirectional traffics detector and pressure transducer send is connected to PLC analog value collecting block---S7-200-EM231, after the processing of the CPU of process PLC, be uploaded to again that upper-position unit---process control machine processs and displays, simultaneously at upper-position unit---industrial process control machine carries out the setting of systematic parameter, and will pass to PLC under the parameter that arrange; Electric signal transmission and control are closed and are: when each oil hydraulic motor forward works, at this moment current signal L14.b, L14.d, L14.f, the L14.h of bidirectional traffics detector output that is connected to the filler opening B pipeline of oil hydraulic motor is a fixed value, when oil hydraulic motor reversed, current signal L14.a, L14.c, L14.e, the L14.g of bidirectional traffics detector output that is connected to the filler opening A pipeline of oil hydraulic motor also was a fixed value; Simultaneously pressure signal in the situation that load identical also be a fixed value; The reference value of these values as a standard, set up a database and be kept at the process control machine the inside; Flow, pressure under when work and oil hydraulic motor real-time working state compare.
Judgement when breaking down: the total discharge that setting is supplied with four oil hydraulic motors simultaneously by four high pressure oil pumps is that Q is total; Setting oil hydraulic motor is the forward working method.Determination methods is as follows:
The phenomenon of " blocking " appears in one: four oil hydraulic motor of phenomenon one of them or several motor---when motor is stuck, fault as oil hydraulic motor 20.a occurs when the forward, the flow that flows to oil hydraulic motor 20.a just is zero substantially, and testing signal L14.b, the L14.a that the bidirectional traffics detector sends becomes the minimum output value 4mA of bidirectional traffics detector; The flow that flows to remaining fluid pressure motor 20.b, 20.c, 20.d will increase, flow is that Q always/3 always/4 becomes Q when all being worked by oil hydraulic motor, at this moment the testing signal L14.c, the L14.d that send of bidirectional traffics detector, L14.e, L14.f, L14.g, L14.h become large, become about 4/3 times of original value.The pressure of supplying with simultaneously other oil hydraulic motor also increases, and the pressure signal that pressure transducer sends also increases.When oil hydraulic motor reversed, detection and determination methods were also as described above.When so similar fault appearred in the motor more than, the signal that the bidirectional traffics detector sends will be higher.The pressure of supplying with simultaneously other oil hydraulic motor also can be larger, and pressure signal Y13a, Y13b that pressure transducer 13a, 13b send are also larger.When the pressure of the flow that detects that or several oil hydraulic motors and oil hydraulic motor work changes, just can detect in real time which motor and fault occur, report to the police at industrial control computer, simultaneously out of service.
Phenomenon two: when one of them or several motor occur " puncture " phenomenon---hydraulic oil has directly flowed to drain tap T from oil hydraulic motor filler opening A or B; When above-mentioned situation occurring such as oil hydraulic motor 20.a, same in the situation that forward, flow to breakdown oil hydraulic motor 20.a reducing because of resistance, the hydraulic oil bidirectional traffics detector 14.b flow of flowing through will increase, the current signal L14.b of its output also just increases, and the oil hydraulic motor 20.b that flows through, 20.c, 20.d flow can reduce, the same hydraulic oil bidirectional traffics detector flow 14.d that flows through, 14.f, 14.h also reduce, the testing signal L14.d that the bidirectional traffics detector sends, L14.f, L14.h diminishes, the pressure that flows to simultaneously oil hydraulic motor also can diminish, and the pressure signal Y13b that pressure transducer 13b sends reduces.Determination methods during counter-rotating is same as above.When above-mentioned phenomenon appearred in the oil hydraulic motor more than, determination methods was with above-mentioned, according to above-mentioned detecting method just can the real time on-line monitoring oil hydraulic motor working condition.
Fault was judged flow process when Fig. 5 was oil hydraulic motor 20.a forward of the present invention.
Fault was judged flow process when Fig. 6 was oil hydraulic motor 20.a counter-rotating of the present invention.The fault judgment method of other oil hydraulic motor 20.b, 20.c, 20.d is the same with oil hydraulic motor 20.a determination methods, the pressure signal that its pressure transducer 13a, 13b detect is Y13a, Y13b, and the flux signal of bidirectional traffics detector 14.c, 14.d, 14.e, 14.f, 14.g, 14.h is L14.c, L14.d, L14.e, L14.f, L14.g, L14.h.
Claims (3)
1. one kind large-scale plate bending rolls hydraulic motor transmission On-line Fault method of real-time is characterized in that:
Comprise that hydraulic transmission part and micro-control partly and according to following steps monitor:
Described hydraulic transmission partly comprises many group high pressure oil pumps (5) and Oil pump electrical machinery (4), electromagnetic relief valve (7) and oil hydraulic motor (20), two-way plug-in valve (9,10,11,12) and pipeline; Drive respectively many high pressure oil pumps (5) by many Oil pump electrical machineries (4), by collaborating behind electromagnetic relief valve (7) build-up pressure, then connect simultaneously many oil hydraulic motors (20) oil inlet and outlet by two-way plug-in valve, the action of two-way plug-in valve changes the flow direction of hydraulic oil, thereby finishes the variation of oil hydraulic motor (20) rotation direction;
Described micro-control partly comprises process control machine, PLC, pressure transducer (13a, 13b) and bidirectional traffics detector (14) and the peripheral circuit installed at the oil circuit of the oil inlet and outlet A of every oil hydraulic motor (20) and B; Process control machine is used for the setting of interface display and parameter, by pressure transducer oil hydraulic motor oil inlet and outlet A and B pressure change signal are detected and pass to PLC in real time, the bidirectional traffics monitor is also passed to PLC with the hydraulic fluid flow rate signal that detects, PLC passes to process control machine after to signal acquisition process, and process control machine and PLC carry out communication by the mode of communication;
Hydraulic motor transmission On-line Fault Real-Time Monitoring step: the flow that the pressure that is detected by described pressure transducer and bidirectional traffics detector detect is converted into the analogue collection module that current signal outputs to PLC and carries out computing; Then flow and the pressure parameter that detects is uploaded to process control machine in real time, compare with the standard parameter value of the database the inside of setting up in the process control machine, judge whether the oil hydraulic motor working state is normal, be judged as and continue operation when normal, automatic alarm and out of service when being judged as fault.
2. large-scale plate bending rolls hydraulic motor transmission On-line Fault method of real-time according to claim 1, it is characterized in that: the hydraulic transmission 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) connects with fuel tank (1) by the pipeline of compensator (3), high-pressure ball valve (2); In-line filter (6) connects high pressure oil pump (5) and manifold block (18a) by pipeline; Manifold block (18a) has asphalt channel and tapped hole, is fixed with electromagnetic relief valve (7) and one-way valve (8) on the plane by screw; Manifold block (18a) and manifold block (18b) connect by pipeline;
Manifold block (18b) has asphalt channel and tapped hole, is used for the circulation of hydraulic oil and the installation of valve member; At the bilateral symmetry face 2 endoporus are arranged respectively, the spool of two-way plug-in valve (9,10,11,12) is plugged in the endoporus of manifold block (18b); Pressure transducer (13a) and (13b) and manifold block (18b) scyewed joint;
Bidirectional traffics detector (14) connects manifold block (18b) and manifold block (18c) by pipeline; Manifold block (18c) has asphalt channel and tapped hole, and equilibrium valve (15), relief valve (16,17) are fixed by screws on its plane;
Oil hydraulic motor (20) oil inlet and outlet A, B connect manifold block (18c) by pipeline; Its drain tap T connects fuel tank (1) by pipeline;
The oil circuit link relation: start Oil pump electrical machinery (4), the hydraulic oil of the oil outlet of high pressure oil pump (5) filters through in-line filter (6), and when electromagnetic relief valve (7) must not electricity, hydraulic oil flowed back to fuel tank (1) by electromagnetic relief valve (7); When electromagnetic relief valve (7) got electric work, hydraulic oil flow to manifold block (18b) simultaneously by one-way valve (8a, 8b, 8c, 8d); When two-way plug-in valve (10) and (11) energising work, hydraulic oil flows out by two-way plug-in valve (10) and enters oil hydraulic motor, flowed back to through two-way plug-in valve (11) by the oil outlet of oil hydraulic motor and to enter fuel tank (1), pressure transducer (13a) detects the variation of the pressure of oil hydraulic motor filler opening in real time, and pressure transducer (13b) detects the variation of the pressure of oil hydraulic motor oil outlet in real time simultaneously; At this moment four oil hydraulic motors forwards simultaneously; Otherwise, when two-way plug-in valve (9) and (12) during electric work, hydraulic oil flows out by two-way plug-in valve (12) and enters oil hydraulic motor, is flowed back to through two-way plug-in valve (9) by the oil outlet of oil hydraulic motor and enters fuel tank (1), and at this moment four oil hydraulic motors reverse simultaneously; Oil inlet and outlet and the joining pipeline of manifold block (18c) at manifold block (18b) are equipped with bidirectional traffics detector (14.a, 14.b, 14.c, 14.d, 14.e, 14.f, 14.g, 14.h); When oil hydraulic motor (20.a) forward, bidirectional traffics detector (14.b) detects the flow of oil hydraulic motor (20.a) import, and bidirectional traffics detector (14.a) detects the flow of hydraulic pressure (20.a) outlet; The same oil hydraulic motor of flow rate testing methods (20.a) of other three oil hydraulic motors (20.b, 20.c, 20.d), during forward, bidirectional traffics detector (14.d, 14.f, 14.h) detects the flow of oil hydraulic motor (20.b, 20.c, 20.d) import, during counter-rotating, bidirectional traffics detector (14.c, 14.e, 14.g) detects the flow of oil hydraulic motor (18.b, 18.c, 18.d) import, and 8 bidirectional traffics detector output electrical signals are the current signal of 4～20mA; The cracking pressure of equilibrium valve when oil hydraulic motor is worked (15.a, 15.b, 15.c, 15.d, 15.e, 15.f, 15.g, 15.h) is very low, is beneficial to flowing of hydraulic oil, reduces the pressure loss of hydraulic system; When oil hydraulic motor was not worked, equilibrium valve cut out the oil outlet of oil hydraulic motor, the accurate location when being beneficial to the rear braking of oil hydraulic motor rotation; Bidirectional relief valve (16.a, 16.b, 16.c, 16.d, 17.a, 17.b, 17.c, 17.d) is installed between equilibrium valve and oil hydraulic motor, and its effect is braked rapidly after the primer fluid pressure motor stops the rotation;
Hydraulic oil flows to and Collection during the work of oil hydraulic motor: start Oil pump electrical machinery, restart the oil hydraulic motor forward, at this moment electromagnetic relief valve (7.a, 7.b, 7.c, 7.d) gets electric, the high pressure liquid force feed enters manifold block (18b) by one-way valve (8.a, 8.b, 8.c, 8.d), also conducting of two-way plug-in valve (10,11); The hydraulic oil circulation of oil hydraulic motor (20.a) sequentially is: two-way plug-in valve (10) → bidirectional traffics detector (14.b) → equilibrium valve (15.b) → oil hydraulic motor (20.a) → equilibrium valve (15.a) → bidirectional traffics detector (14.a) → two-way plug-in valve (11) → fuel tank (1); Flow through bidirectional traffics detector (14.b) and (14.a) time, bidirectional traffics detector and pressure transducer all send the current signal of 4～20 mA at hydraulic oil; Remaining oil hydraulic motor working procedure is the same; When hydraulic fluid flow rate reaches the peak rate of flow of bidirectional traffics detector, the bidirectional traffics detector is output as 20 mA current signals, the current signal of the variation of flow and the output of bidirectional traffics detector is the variation relation of a linearity, monitoring stream is crossed the variation of real-time traffic and the pressure of every oil hydraulic motor in real time, and whether the variation by flow and pressure real-time monitors every oil hydraulic motor and break down.
3. large-scale plate bending rolls hydraulic motor transmission On-line Fault method of real-time according to claim 1, it is characterized in that: micro-control part electric control system structure is: the current signal that the bidirectional traffics detector (14 .a, 14.b) that import and export A, the B of oil hydraulic motor (20.a) connects sends is respectively (L14.a, L14.b); The current signal that the bidirectional traffics detector that A, the B import and export of oil hydraulic motor (18.b, 18.c, 18.d) connect sends is respectively (L14.c, L14.d, L14.e, L14.f, L14.g, L14.h); Pressure transducer (13a, 13b) equally also sends the current signal (Y13a, Y13b) of 4～20 mA; The current signal that bidirectional traffics detector and pressure transducer send is connected to PLC analog value collecting block---S7-200-EM231, after the processing of the CPU of process PLC, be uploaded to again that upper-position unit---process control machine processs and displays, simultaneously at upper-position unit---industrial process control machine carries out the setting of systematic parameter, and will pass to PLC under the parameter that arrange; Electric signal transmission and control are closed and are: when each oil hydraulic motor forward works, at this moment the current signal (L14.b, L14.d, L14.f, L14.h) of bidirectional traffics detector output that is connected to the filler opening B pipeline of oil hydraulic motor is a fixed value, when oil hydraulic motor reversed, the current signal (L14.a, L14.c, L14.e, L14.g) of bidirectional traffics detector output that is connected to the filler opening A pipeline of oil hydraulic motor also was a fixed value; Simultaneously pressure signal in the situation that load identical also be a fixed value; The reference value of these values as a standard, set up a database and be kept at the process control machine the inside; Flow, pressure under when work and oil hydraulic motor real-time working state compare.
4. one kind large-scale plate bending rolls hydraulic motor transmission On-line Fault real-time monitoring device comprises hydraulic transmission part and micro-control part, and it is characterized in that: the hydraulic transmission 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) connects with fuel tank (1) by the pipeline of compensator (3), high-pressure ball valve (2); In-line filter (6) connects high pressure oil pump (5) and manifold block (18a) by pipeline; Manifold block (18a) has asphalt channel and tapped hole, is fixed with electromagnetic relief valve (7) and one-way valve (8) on the plane by screw; Manifold block (18a) and manifold block (18b) connect by pipeline;
Manifold block (18b) has asphalt channel and tapped hole, is used for the circulation of hydraulic oil and the installation of valve member; At the bilateral symmetry face 2 endoporus are arranged respectively, the spool of two-way plug-in valve (9,10,11,12) is plugged in the endoporus of manifold block (18b); Pressure transducer (13a) and (13b) and manifold block (18b) scyewed joint;
Bidirectional traffics detector (14) connects manifold block (18b) and manifold block (18c) by pipeline; Manifold block (18c) has asphalt channel and tapped hole, and equilibrium valve (15), relief valve (16,17) are fixed by screws on its plane;
Oil hydraulic motor (20) oil inlet and outlet A, B connect manifold block (18c) by pipeline; Its drain tap T connects fuel tank (1) by pipeline;
The oil circuit link relation: start Oil pump electrical machinery (4), the hydraulic oil of the oil outlet of high pressure oil pump (5) filters through in-line filter (6), and when electromagnetic relief valve (7) must not electricity, hydraulic oil flowed back to fuel tank (1) by electromagnetic relief valve (7); When electromagnetic relief valve (7) got electric work, hydraulic oil flow to manifold block (18b) simultaneously by one-way valve (8a, 8b, 8c, 8d); When two-way plug-in valve (10) and (11) energising work, hydraulic oil flows out by two-way plug-in valve (10) and enters oil hydraulic motor, flowed back to through two-way plug-in valve (11) by the oil outlet of oil hydraulic motor and to enter fuel tank (1), pressure transducer (13a) detects the variation of the pressure of oil hydraulic motor filler opening in real time, and pressure transducer (13b) detects the variation of the pressure of oil hydraulic motor oil outlet in real time simultaneously; At this moment four oil hydraulic motors forwards simultaneously; Otherwise, when two-way plug-in valve (9) and (12) during electric work, hydraulic oil flows out by two-way plug-in valve (12) and enters oil hydraulic motor, is flowed back to through two-way plug-in valve (9) by the oil outlet of oil hydraulic motor and enters fuel tank (1), and at this moment four oil hydraulic motors reverse simultaneously; Oil inlet and outlet and the joining pipeline of manifold block (18c) at manifold block (18b) are equipped with bidirectional traffics detector (14.a, 14.b, 14.c, 14.d, 14.e, 14.f, 14.g, 14.h); When oil hydraulic motor (20.a) forward, bidirectional traffics detector (14.b) detects the flow of oil hydraulic motor (20.a) import, and bidirectional traffics detector (14.a) detects the flow of hydraulic pressure (20.a) outlet; The same oil hydraulic motor of flow rate testing methods (20.a) of other three oil hydraulic motors (20.b, 20.c, 20.d), during forward, bidirectional traffics detector (14.d, 14.f, 14.h) detects the flow of oil hydraulic motor (20.b, 20.c, 20.d) import, during counter-rotating, bidirectional traffics detector (14.c, 14.e, 14.g) detects the flow of oil hydraulic motor (18.b, 18.c, 18.d) import, and 8 bidirectional traffics detector output electrical signals are the current signal of 4～20mA; The cracking pressure of equilibrium valve when oil hydraulic motor is worked (15.a, 15.b, 15.c, 15.d, 15.e, 15.f, 15.g, 15.h) is very low, is beneficial to flowing of hydraulic oil, reduces the pressure loss of hydraulic system; When oil hydraulic motor was not worked, equilibrium valve cut out the oil outlet of oil hydraulic motor, the accurate location when being beneficial to the rear braking of oil hydraulic motor rotation; Bidirectional relief valve (16.a, 16.b, 16.c, 16.d, 17.a, 17.b, 17.c, 17.d) is installed between equilibrium valve and oil hydraulic motor, and its effect is braked rapidly after the primer fluid pressure motor stops the rotation;
Hydraulic oil flows to and Collection during the work of oil hydraulic motor: start Oil pump electrical machinery, restart the oil hydraulic motor forward, at this moment electromagnetic relief valve (7.a, 7.b, 7.c, 7.d) gets electric, the high pressure liquid force feed enters manifold block (18b) by one-way valve (8.a, 8.b, 8.c, 8.d), also conducting of two-way plug-in valve (10,11); The hydraulic oil circulation of oil hydraulic motor (20.a) sequentially is: two-way plug-in valve (10) → bidirectional traffics detector (14.b) → equilibrium valve (15.b) → oil hydraulic motor (20.a) → equilibrium valve (15.a) → bidirectional traffics detector (14.a) → two-way plug-in valve (11) → fuel tank (1); Flow through bidirectional traffics detector (14.b) and (14.a) time, bidirectional traffics detector and pressure transducer all send the current signal of 4～20 mA at hydraulic oil; Remaining oil hydraulic motor working procedure is the same; When hydraulic fluid flow rate reaches the peak rate of flow of bidirectional traffics detector, the bidirectional traffics detector is output as 20 mA current signals, the current signal of the variation of flow and the output of bidirectional traffics detector is the variation relation of a linearity, monitoring stream is crossed the variation of real-time traffic and the pressure of every oil hydraulic motor in real time, and whether the variation by flow and pressure real-time monitors every oil hydraulic motor and break down.
Micro-control part electric control system structure is: the current signal that the bidirectional traffics detector (14 .a, 14.b) that import and export A, the B of oil hydraulic motor (20.a) connects sends is respectively (L14.a, L14.b); The current signal that the bidirectional traffics detector that A, the B import and export of oil hydraulic motor (18.b, 18.c, 18.d) connect sends is respectively (L14.c, L14.d, L14.e, L14.f, L14.g, L14.h); Pressure transducer (13a, 13b) equally also sends the current signal (Y13a, Y13b) of 4～20 mA; The current signal that bidirectional traffics detector and pressure transducer send is connected to PLC analog value collecting block---S7-200-EM231, after the processing of the CPU of process PLC, be uploaded to again that upper-position unit---process control machine processs and displays, simultaneously at upper-position unit---industrial process control machine carries out the setting of systematic parameter, and will pass to PLC under the parameter that arrange; Electric signal transmission and control are closed and are: when each oil hydraulic motor forward works, at this moment the current signal (L14.b, L14.d, L14.f, L14.h) of bidirectional traffics detector output that is connected to the filler opening B pipeline of oil hydraulic motor is a fixed value, when oil hydraulic motor reversed, the current signal (L14.a, L14.c, L14.e, L14.g) of bidirectional traffics detector output that is connected to the filler opening A pipeline of oil hydraulic motor also was a fixed value; Simultaneously pressure signal in the situation that load identical also be a fixed value; The reference value of these values as a standard, set up a database and be kept at the process control machine the inside; Flow, pressure under when work and oil hydraulic motor real-time working state compare.
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| CN103967859A (en) * | 2014-05-23 | 2014-08-06 | 兰州兰石集团有限公司 | Closed hydraulic system for controlling stable rotation of upper roller on four-roller veneer reeling machine |
| CN104163383A (en) * | 2014-08-13 | 2014-11-26 | 石家庄铁道大学 | Safety monitoring system for heavy engineering machinery |
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| CN114147737A (en) * | 2021-11-24 | 2022-03-08 | 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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