CN202812386U - Intelligent hydraulic valve - Google Patents
Intelligent hydraulic valve Download PDFInfo
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- CN202812386U CN202812386U CN 201220130601 CN201220130601U CN202812386U CN 202812386 U CN202812386 U CN 202812386U CN 201220130601 CN201220130601 CN 201220130601 CN 201220130601 U CN201220130601 U CN 201220130601U CN 202812386 U CN202812386 U CN 202812386U
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Abstract
The utility model relates to an intelligent hydraulic valve including an electro-hydraulic proportioning valve which includes a valve body, a valve core, a valve cavity for holding the valve core, and a proportioning electromagnet. The intelligent hydraulic valve further includes a supersonic generator, an ultrasonic energy transducer, and an intelligent controller being capable of detecting the jamming and clamping failures of a detectable electro-hydraulic proportioning valve and controlling the work of the supersonic generator. The supersonic generator and the ultrasonic energy transducer are arranged in pair, the intelligent controller includes a flutter signal generating module, a system control signal module, a stabilized power supply module, a PID control module, a power amplification module, a sampling module, a signal processing module, a negative feedback module, a jamming and clamping judging module and a supersonic generator control module. Such a device can detect the jamming and clamping failures in real time online and restores the jamming and clamping failures caused by pollution and imbalanced radial load by means of ultrasonic vibration.
Description
Technical field
The utility model relates to a kind of hydrovalve, particularly a kind ofly can detect in real time, judge and instruction is carried out and repaired valve core of the spool valve bite chucking fault and utilize the ultrasonic vibration reparation by polluting and the radial force imbalance causes the intelligent hydraulic valve of bite chucking fault.
Background technique
Slide-valve gear is to adopt maximum a kind of structural type in all kinds of hydrovalves, and guiding valve consists of valve body, spool and three critical pieces of valve pocket, and by changing the position of spool in the valve body valve pocket, guiding valve can be realized change and the break-make of direction of flow.It is one of fault the most common in hydraulic system and failure mode that the guiding valve bite even tightens fault, generally can be divided into hydraulic pressure bite, chucking and mechanical bite chucking two large classes.Popular saying, bite refers to the intermediateness between nominal situation and chucking, and chucking is exactly that spool is inactive, and bite refers to that spool moves difficulty, smooth and easy during not as normal operation, is the omen of chucking, and solution in time can be avoided the generation of chucking.
Wherein, the hydraulic pressure bite, the chucking mainly because machining causes spool error in geometrical form and coaxiality error to produce radially unbalanced pressure, cause, mechanical bite, the chucking be mainly due to the operation on-the-spot particulate pollutant deposit and cause gradually in the guiding valve gap.There is constant pressure reduction at radial clearance two ends in spool and valve body formation, when hydraulic oil is brought contamination particle into gap, because the surface of gap runner hole wall also has the ability of catching contamination particle---degree of depth type filtering effect is constantly caught contamination particle, and contamination particle occurs hold back, pollute clamping force thereby produce.Simply say, pollute the main Types that chucking is the machinery chucking, the radial force imbalance is to cause the main cause of hydraulic lock.And bite is often caused by slight pollution chucking or radial force imbalance, resistance is less.
In prior art, the method of getting rid of above-mentioned two kinds of faults mainly contains two kinds: the one, in processing and on-the-spot running, take measures, reduce the probability broken down, such as installing on fine filter, spool, rationally offer balancing slit, strict processing and assembling quality etc. in system; Another kind method is exactly that online real-time fault diagnosis and fault are got rid of.At present, there is no sensitiveer, online real time fault diagnosis device accurately, though or similar device complex structure, with high costs arranged.
For the problems referred to above, a kind of solenoid directional control valve that HERION company manufactures and designs, except its work spool, also have " hammer " spool.During normal operation, " hammer " spool is failure to actuate, and when spool can't playback because of chucking, " hammer " spool knocks the work spool under spring-force driven dual, makes its return.The narrow limitation of this scheme is, the compressed machinery spring obtains and knocks energy owing to being top electricity, and " hammer " spool is hammer action for once, and is unidirectional, can't guarantee that fault gets rid of, and also can't be applied to servo, proportional valve control system.
The imagination that professor Li Wei of Zhejiang University has proposed accordingly a kind of " electric shock hammer ", when confirming that the chucking fault occurs, output signal access and corresponding amplifier that will " electric shock hammer " circuit, make it to produce significantly AC signal, " knocks " spool tightened repeatedly two-wayly.The narrow limitation of this thinking is, only depends on the electromagnetic force of valve body self sometimes can't overcome clamping force, and sharply changing also of electrical signal can produce and disturb the normal operation of system.
In view of this, the inventor is in conjunction with being engaged in hydrovalve area research work experience for many years, and the defect of above-mentioned technical field is studied for a long period of time, and this case produces thus.
The model utility content
The purpose of this utility model is to provide a kind of intelligent hydraulic valve, and can detect in real time the valve core of the spool valve bite, tighten fault and utilize the ultrasonic vibration reparation by the bite polluted and the radial force imbalance causes, chucking fault, and simple in structure, with low cost.
To achieve these goals, the technical solution of the utility model is as follows:
A kind of intelligent hydraulic valve, comprise electro-hydraulic proportional valve, and electro-hydraulic proportional valve comprises valve pocket and the proportion electro-magnet of valve body, spool, placement spool.Also comprise ultrasonic generator, supersonic transducer and can detect the electro-hydraulic proportional valve bite, tighten fault and control the intelligent controller of ultrasonic generator work.Ultrasonic generator and supersonic transducer arrange in pairs, the output terminal of ultrasonic generator is electrically connected to two electrodes of supersonic transducer, totally 4 of supersonic transducers, be fixedly installed in four sides up and down of electric-hydraulic proportion valve body with respect to the medial axis symmetry of electro-hydraulic proportional valve valve pocket, the medial axis of the shaft axis of supersonic transducer and electro-hydraulic proportional valve valve pocket intersect vertically and four shaft axiss in same plane.Intelligent controller is electrically connected to ultrasonic generator and electro-hydraulic proportional valve respectively.
Further, described intelligent controller comprises vibrating signal generation module 16, system control signal module 14, power module of voltage regulation 15, pid control module 17, power amplifier module 18, sampling module 19, signal processing module 20, reverse feedback module 21, bite chucking judging module 22 and ultrasonic generator control module 23;
Wherein, power module of voltage regulation 15 is connected with ultrasonic generator control module 23 with vibrating signal generation module 16, pid control module 17, power amplifier module 18, sampling module 19, signal processing module 20, reverse feedback module 21, bite chucking judging module 22 respectively; Vibrating signal generation module 16 is connected with pid control module 17, power amplifier module 18 respectively; System control signal module 14 is connected with reverse feedback module 21, pid control module 17 respectively; Pid control module 17 is connected with system control signal module 14, reverse feedback module 21, vibrating signal generation module 16, power amplifier module 18 respectively; Reverse feedback module 21 is connected with system control signal module 14, pid control module 17, signal processing module 20 respectively; Power amplifier module 18 is connected with the proportion electro-magnet 24 on pid control module 17, vibrating signal generation module 16, electro-hydraulic proportional valve respectively; Sampling module 19 is connected with the proportion electro-magnet 24 on signal processing module 20, electro-hydraulic proportional valve respectively; Signal processing module 20 is connected with sampling module 19, bite chucking judging module 22, reverse feedback module 21 respectively; Bite chucking judging module 22 is connected with signal processing module 20, ultrasonic generator control module 23 respectively; Ultrasonic generator control module 23 is connected with four ultrasonic generators;
Vibrating signal generation module 16 generates characteristic frequency, the vibrating signal of amplitude and waveform, system control signal module 14 for the signal of controlling the electro-hydraulic proportional valve spool travel with after subtracting each other from the feedback signal of reverse feedback module 21, offer pid control module 17 as input, after the output signal of pid control module 17 and the vibrating signal addition from vibrating signal generation module 16, after amplifying, power amplifier module 18 removes to drive proportion electro-magnet 24, vibrating signal waveform on the proportion electro-magnet 24 that sampling module 19 Real-time Collections are connected with spool 4, and waveform is offered to signal processing module 20, signal processing module 20 separates control signal with the flutter waveform, offer reverse feedback module 21 using control signal as input, the average value information of control signal and vibrating signal are offered to bite chucking judging module 22 as input simultaneously, bite chucking judging module 22 is according to the frequency of input vibrating signal, peak-to-peak value, the average value information of wave distortion and control signal, provide bite by Fuzzy multiple criteria decision-making method, the degree of membership judgement of chucking, and by this information output to ultrasonic generator control module 23, control ultrasonic generator and supersonic transducer work by ultrasonic generator control module 23.Thereby carry out to repair in detection, judgement and the instruction of bite chucking fault and there is high accuracy, sensitivity and reliability, such as utilizing specific vibrating signal generation module and signal processing module, can guarantee monotonicity, validity and the sensitivity of bite chucking testing signal.
Further, described bite chucking judging module 22 provides the degree of membership judgement of bite, chucking and this information output is referred to ultrasonic generator control module 23 by Fuzzy multiple criteria decision-making method: at first, adopt scoring function
Δ, accurate function
hand departure function
pcomprehensively pass judgment on, establish
a=
a 1 ,
a 2 ,
...,
a m be the scheme collection,
g=(
Δ,
h,
d)
tfor attribute vector,
for
gin each attribute weight vector,
∈ [0,1],
, estimate matrix and be:
; Scheme integrates three kinds of schemes in A three kinds of operating modes as electro-hydraulic proportional valve, respectively nominal situation, bite operating mode and chucking operating mode, frequency, peak-to-peak value, wave distortion and mean value that four kinds of attributes in property set G are vibrating signal, these four kinds of signals are provided by signal processing module 20; In bite chucking judging module, 22 12 bits serial A/D transducer TLV2453 converts 4 road signals digital quantity signal to and passes to data processing chip TMS320VC5402; The weight vectors of index is
ω=(0.1,0.5,0.2,0.2)
tthe weight maximum of the peak-to-peak value attribute of vibrating signal, these four weights, are called for data processing chip TMS320VC5402 in the FLASHROM in bite chucking judging module 22 by software solidification, can also by network remote, revise by the RS485 communication interface simultaneously; Attribute weight vector ω is multiplied each other and obtains the comprehensive vector of passing judgment on the evaluation matrix J:
, sorted according to the size of B element, and press maximum subjection principle and select optimum scheme; Secondly, the Interval Intuitionistic Fuzzy decision-making concrete steps based on this ranking method are as follows: the first step, and utilize weighting arithmetic to estimate the capable all elements of i in operator (1) Integrated Decision matrix, thereby obtain the comprehensive Interval Intuitionistic Fuzzy value corresponding to option A i; Second step, utilize respectively scoring function, accurate function and the departure function functional value that counts the score
(Ai), accurate functional value H (Ai) and departure function value P (Ai) (i=1,2 ..., m), build and estimate matrix J; The 3rd step, select the attribute weight vector
, calculate the comprehensive vectorial B of judge, sorted according to the size of B element, and press maximum subjection principle and select optimum scheme; The 3rd, after data processing chip TMS320VC5402 processes, provide the comprehensive judge information of electro-hydraulic proportional valve operating mode, after this information offers ultrasonic generator control module 23, according to different operating modes, go to control whether ultrasonic generator and supersonic transducer work or no whole work.Thereby further improve monotonicity, validity and the sensitivity of bite chucking testing signal, improve in the faut detection of bite chucking, judgement and instruction and carry out accuracy, sensitivity and the reliability on repairing.
Further, it is 95Hz that described vibrating signal generation module 16 produces frequency, and amplitude is 85% rated current, the vibrating signal that waveform is normal distribution curve.The difference of waveform, frequency and the amplitude of the vibrating signal that vibrating signal generation module generates is most important for validity and the sensitivity of this detecting method, the inventor finds under study for action, the vibrating signal frequency is at 95Hz, amplitude is 85% rated current, when waveform is normal distribution curve, it is dull that vibrating signal changes, and highly sensitive, best to the detection effect of fault.
Further, when bite chucking judging module provides the bite judgement, start the bite fault and solve pattern, the two pairs of ultrasonic generators of the upper and lower side of ultrasonic generator control module control valve body and supersonic transducer are worked simultaneously; When bite chucking judging module provides the chucking judgement, start the chucking fault and solve pattern, the four pairs of ultrasonic generators of ultrasonic generator control module control valve body four sides and supersonic transducer are worked simultaneously.Thereby can provide the starting time of ultrasonic generator and supersonic transducer and start number according to the fault order of severity, energy saving, have reduced the damage of ultrasonic cavitation corrosion to hydrovalve, improved reliability and the life-span of hydrovalve.
Further, intelligent controller also comprises and is subject to the ultrasonic generator control module to control, limit ultrasonic generator and/or the timing device of supersonic transducer operating time, when after the operating time regularly, vibrating signal waveform on the proportion electro-magnet 24 that sampling module 19 continuous acquisition are connected with spool 4, and waveform is offered to signal processing module 20, give to be out of order through bite chucking judging module 22 and get rid of effect judgement information and make the follow-up work instruction.Thereby further save energy and reduce the cost and increase work efficiency.
Further, described bite chucking judging module 22 is given to be out of order to get rid of effect judgement information and make the follow-up work instruction and referred to: when bite tightens, judging module 22 provides bite or the chucking fault is got rid of judgement, and instruction returns nominal situation; Alleviate judgement when bite chucking judging module 22 provides the bite fault, instruction starts bite fault solution pattern again; Alleviate judgement when bite chucking judging module 22 provides the chucking fault, instruction starts chucking fault solution pattern again.Thereby further save energy and reduce the cost and increase work efficiency.
Further, described bite chucking judging module 22 is given to be out of order to get rid of effect judgement information and make the follow-up work instruction and is also comprised: when starting twice above bite fault, solve pattern, bite chucking judging module 22 still provides the bite fault and alleviates judgement, think that this bite fault cause is for the chucking fault, instruction starts the chucking fault and solves pattern.Thereby further save energy and reduce the cost and increase work efficiency.
Further, described supersonic transducer is installed on the oil outlet side of power supply Proportional valve valve body side.Due to generally low pressure one side alluvial in valve body of contamination particle, corresponding supersonic transducer is arranged on the valve body side near oil outlet one end, and its effect of repairing mechanical bite, chucking fault is better.
Further, described supersonic transducer is installed on the zone of the corresponding spool in power supply Proportional valve valve body side.Due to the generation of unbalanced pressure radially, mainly in spool and the contacted zone of valve pocket, corresponding supersonic transducer is arranged on the corresponding region of the corresponding spool in valve body side, and its effect of repairing hydraulic pressure bite, chucking fault is better.
The working principle that the utility model solves mechanical bite, chucking fault is as follows:
When electro-hydraulic proportional valve produces mechanical bite, chucking fault, with the approaching contamination particle of the gap size of valve body spool because of valve body and uneven large the contamination particle of formation that be detained of spool face, than granule, be trapped between large particle simultaneously, form the dirty grain of dynamic growth cake, both actings in conjunction form common pollution chucking.The high-frequency oscillation signal sent by ultrasonic generator, converting the high frequency mechanical oscillation to by transducer propagates in hydraulic oil, ultrasound in hydraulic oil density interphase to previous irradiation, make flow of fluid and produce the micro-bubble that ten hundreds of diameters is 50-500 μ m, the micro-bubble be present in liquid vibrates under the effect of sound field.These bubbles form at the negative pressuren zone of ultrasound longitudinal propagation, growth, and, at zone of positive pressure, when acoustic pressure reaches certain value, bubble increases rapidly, then closed suddenly.And produce shock wave when bubble is closed, produce thousands of barometric pressure around it, destroy large contamination particle and dirty grain cake, and make them be dispersed into granule to be melted in hydraulic oil, and taken away slide-valve gear with oil circulation, thereby reach clean fluid and remove the purpose that tightens fault.When being the lighter mechanical bite of the order of severity, as long as start the supersonic transducer of a pair of correspondence, when be the heavier machinery of the order of severity while tightening, can start the supersonic transducer of two pairs of correspondences.
The working principle that the utility model solves hydraulic pressure bite, chucking is as follows:
The reason that electro-hydraulic proportional valve produces hydraulic pressure bite, chucking fault is to produce radially unbalanced pressure because machining causes how much proterties errors of spool and coaxiality error, makes spool press to the valve body wall, finally produces hydraulic pressure bite, chucking.When having serious hydraulic lock, the present invention arranges four supersonic transducers symmetrically and evenly in four sides of valve body, applies same ultrasound to them and drives signal, will produce vibration at valve interior surface, thereby spool is formed to uniform suspending power.Because the hydraulic lock meeting causes spool bias, press to a certain side wall surface, the gap smaller between this side and spool, and the gap between opposite one side and spool becomes large.Now, a side in gap smaller, the effect of pressing due to Ultrasonic Radiation strengthens, active force to spool will become large, and opposite one side Ultrasonic Radiation presses the active force to spool to diminish, the active force that will produce twice on same axis becomes spool a large thruster towards gap, until two side clearance approximately equals.Four sides arrange that four supersonic transducers can guarantee that spool is substantially on medial axis symmetrically and evenly, friction factor between valve interior surface and spool significantly reduces, can avoid spool to be crushed on valve interior wall can't move, thereby reaches the purpose that solves hydraulic lock.The principle that solves the hydraulic pressure bite is the same, just because the order of severity of hydraulic pressure bite is light than hydraulic lock, so as long as start the supersonic transducer of a pair of correspondence.
Ultrasonic generator and supersonic transducer in the intelligent hydraulic valve the utility model proposes belong to intermittent duty, and under nominal situation, ultrasonic generator and supersonic transducer, in halted state, just start while only having bite chucking fault to be detected.The faut detection of bite chucking is completed by intelligent controller.
The intelligent controller working principle of the utility model judgement bite chucking fault is as follows:
Be generally and avoid spool bite chucking, generally being superimposed with the low frequency vibrating signal on spool, to make spool be the radial vibration that keeps slight axially moving.When bite, chucking fault occur, must cause spool radial vibration damping to increase, be reacted to thus on electrical signal and just make vibrating signal change, intelligent controller can judge that by the variation that detects vibrating signal whether spool is in fault state.Because feedback module in Common Controller has obvious inhibitory action to the variation effect of vibrating signal, make this wave form varies ratio less.Signal processing module in intelligent controller is separated vibrating signal from control signal, tightens judging module by bite and processes, and detection sensitivity is significantly improved.
Bite chucking judging module goes to control the ultrasonic generator control module according to court verdict.While the bite fault being detected, a pair of ultrasonic generator of the upper and lower side of ultrasonic generator control module control valve body and transducer work; While the chucking fault being detected, ultrasonic generator control module control valve body four ultrasonic generators facing each other and transducer are worked simultaneously.
Adopt the technical program, the utility model is obtained following useful technique effect: 1, utilize hyperacoustic pneumatics effect to pulverize large contamination particle and dirty grain cake, thereby effectively get rid of mechanical bite, chucking fault; 2, utilize the friction factor between the low valve interior surface of Ultrasonic Radiation pressure drop and spool and spool is suspended near the valve pocket medial axis, thereby effectively getting rid of hydraulic pressure bite, chucking fault; 3, adopt ultrasonic processing bite, chucking fault, thereby also save energy and reduce the cost working life of greatly improving equipment easy to use, effective; 4, to when starting ultrasonic processing apparatus, adopt intelligent control to judge, realize intermittent duty, under nominal situation, ultrasonic generator and supersonic transducer, in halted state, just start while only having bite chucking fault to be detected, thereby greatly improve the working life of equipment and save energy and reduce the cost; 5, with existing similar functions device, compare, simple in structure, with low cost and using effect is good.
Below in conjunction with drawings and Examples, the utility model is described in further detail the technical solution of the utility model in order further to explain.
The accompanying drawing explanation
Fig. 1 is structured flowchart of the present utility model;
Fig. 2 is the axial sectional view that ultrasonic generator is connected with slide-valve gear with supersonic transducer;
Fig. 3 is the radial cross-section that ultrasonic generator is connected with slide-valve gear with supersonic transducer;
The structured flowchart that Fig. 4 is intelligent controller.
Embodiment
Below in conjunction with accompanying drawing to enforcement further detailed description of the present utility model.
In the following embodiments, that ultrasonic generator adopts is KMD-1000, and that supersonic transducer adopts is YP-7015-4Z, that electro-hydraulic proportional valve adopts is QVKZOR, intelligent controller is the circuit board that a monoblock is complete, and each module is the functional circuit on it, is inventor's self-control.
Embodiment 1: bite faut detection and self repair
With reference to Fig. 1, Fig. 2 and Fig. 4, a kind of intelligent hydraulic valve, comprise electro-hydraulic proportional valve 30, and electro-hydraulic proportional valve 30 comprises valve body 35, spool 34, places valve pocket 33 and the proportion electro-magnet 24 of spool.Also comprise ultrasonic generator 2, supersonic transducer 3 and can detect the intelligent controller 1 that the electro-hydraulic proportional valve bite tightens fault and controls ultrasonic generator work.Intelligent controller 1 is electrically connected to ultrasonic generator 2 and electro-hydraulic proportional valve 30 respectively.
The output terminal of ultrasonic generator 6 is electrically connected to two electrodes of supersonic transducer 7, and supersonic transducer 7 is fixedly connected on the upper side of electric-hydraulic proportion valve body 35; Two electrodes of the output terminal of ultrasonic generator 8 and supersonic transducer 9 are connected, and supersonic transducer 9 is fixedly connected on the downside of electro-hydraulic proportional valve 30 valve bodies 35; The medial axis of the shaft axis of these two supersonic transducers and electro-hydraulic proportional valve 30 valve pockets 33 intersect vertically and with respect to the medial axis symmetrical placement in oil outlet one side, two shaft axiss are in same plane.In the present embodiment, supersonic transducer is by central piezo ceramic element, the front and back metal cover board, and the prestressing force screw rod, electrode slices and insulation tube form.Ultrasonic generator adopts the aviation plug of 2 cores or 4 cores to be connected with supersonic transducer.Because the technical program requires, supersonic transducer is symmetrical to be installed, if four lateral thickness up and down of the valve body of electro-hydraulic proportional valve not with the medial axis symmetric design of valve pocket, form that can the supersonic transducer cushioned layer in the thinner side of valve body is overcome.The material of bed course does not limit, as long as it does not affect the working principle as aforementioned the technical program.
Above-mentioned intelligent controller can adopt other system integrated, as long as it can detect electro-hydraulic proportional valve bite chucking fault and control ultrasonic generator work.In the present embodiment, inventor's specialized designs one intelligent controller 1, by vibrating signal generation module 16, system control signal module 14, power module of voltage regulation 15, pid control module 17, power amplifier module 18, sampling module 19, signal processing module 20, reverse feedback module 21, bite chucking judging module 22 and ultrasonic generator control module 23, formed.Wherein power module of voltage regulation 15 is connected with ultrasonic generator control module 23 with vibrating signal generation module 16, pid control module 17, power amplifier module 18, sampling module 19, signal processing module 20, reverse feedback module 21, bite chucking judging module 22 respectively; Vibrating signal generation module 16 is connected with pid control module 17, power amplifier module 18 respectively; System control signal module 14 is connected with reverse feedback module 21, pid control module 17 respectively; Pid control module 17 is connected with system control signal module 14, reverse feedback module 21, vibrating signal generation module 16, power amplifier module 18 respectively; Reverse feedback module 21 is connected with system control signal module 14, pid control module 17, signal processing module 20 respectively; Power amplifier module 18 is connected with the proportion electro-magnet 24 on pid control module 17, vibrating signal generation module 16, electro-hydraulic proportional valve respectively; Sampling module 19 is connected with the proportion electro-magnet 24 on signal processing module 20, electro-hydraulic proportional valve respectively; Signal processing module 20 is connected with sampling module 19, bite chucking judging module 22, reverse feedback module 21 respectively; Bite chucking judging module 22 is connected with signal processing module 20, ultrasonic generator control module 23 respectively; Ultrasonic generator control module 23 is connected with four ultrasonic generators.
In the present embodiment, specifically, the analog signals of the power amplifier module of intelligent controller output is connected by the analog quantity input of 7 cores or 12 core plugs and electro-hydraulic proportional valve.The ultrasonic generator control module of intelligent controller is by the start and stop of Control ultrasonic generator.
In present embodiment, it is 95Hz that vibrating signal generation module 16 produces frequency, and amplitude is 85% rated current, the vibrating signal that waveform is normal distribution curve; The difference of waveform, frequency and the amplitude of the vibrating signal that vibrating signal generation module generates is most important for validity and the sensitivity of this detecting method, the inventor finds under study for action, the vibrating signal frequency is at 95Hz, amplitude is 85% rated current, when waveform is normal distribution curve, it is dull that vibrating signal changes, and highly sensitive, best to the detection effect of fault.System control signal module 14 for the signal of controlling the electro-hydraulic proportional valve spool travel with after subtracting each other from the feedback signal of reverse feedback module 21, offer pid control module 17 as input; After the output signal of pid control module 17 and the vibrating signal addition from vibrating signal generation module 16, after amplifying, power amplifier module 18 removes to drive proportion electro-magnet 24; Vibrating signal waveform on the proportion electro-magnet 24 that sampling module 19 Real-time Collections are connected with spool 4, and waveform is offered to signal processing module 20; Signal processing module 20 separates control signal with the flutter waveform, offer reverse feedback module 21 using control signal as input, the average value information of control signal and vibrating signal is offered to bite chucking judging module 22 as input simultaneously; Bite chucking judging module 22 is according to the average value information of frequency, peak-to-peak value, wave distortion and the control signal of input vibrating signal, provide the degree of membership judgement of bite, chucking by Fuzzy multiple criteria decision-making method, and by this information output to ultrasonic generator control module 23, control ultrasonic generator and supersonic transducer work by ultrasonic generator control module 23.Adopt the intelligent controller of above-mentioned feature, carry out to repair in detection, judgement and the instruction of bite chucking fault and there is high accuracy, sensitivity and reliability, such as utilizing specific vibrating signal generation module and signal processing module, can guarantee monotonicity, validity and the sensitivity of bite chucking testing signal.Realize the modules of above-mentioned functions, the structures such as its concrete circuit, components and parts owing to belonging to prior art, just repeat no more herein.
When the bite fault occurs, when bite chucking judging module provides the bite judgement, ultrasonic generator control module 23 is sent control signal, starts ultrasonic generator 6 and ultrasonic generator 8 and starts timing device simultaneously; Ultrasonic generator 6 and 8 continues the high-frequency oscillation signal sent in timing, converting the high frequency mechanical oscillation to by transducer 7 and 9 respectively propagates in hydraulic oil, ultrasound in hydraulic oil density interphase to previous irradiation, make flow of fluid and produce the micro-bubble that ten hundreds of diameters is 50-500 μ m, the micro-bubble be present in liquid vibrates under the effect of sound field.These bubbles form at the negative pressuren zone of ultrasound longitudinal propagation, growth, and, at zone of positive pressure, when acoustic pressure reaches certain value, bubble increases rapidly, then closed suddenly.And produce shock wave when bubble is closed, and produce thousands of barometric pressure around it, destroy large contamination particle and dirty grain cake, and make them be dispersed into granule to be melted in hydraulic oil, and taken away slide-valve gear with oil circulation.Because the bite fault causes by polluting chucking usually, the cavitation effect that the two pairs of ultrasonic generators and transducer produce is enough removed contamination particle, gets rid of mechanical bite fault.Certainly above-mentioned two pairs of ultrasonic generators and supersonic transducer produce uniform suspending power to spool, thereby can get rid of hydraulic pressure bite fault, and its concrete mode can be referring to the analysis in embodiment 2.Above-mentioned design makes and can provide the starting time of ultrasonic generator and supersonic transducer and start number according to the fault order of severity, and energy saving, reduced the damage of ultrasonic cavitation corrosion to hydrovalve, improved reliability and the life-span of hydrovalve.
When after the operating time regularly, the vibrating signal waveform on the common proportion electro-magnet 24 that sampling module 19 continuous acquisition are connected with spool 4, and waveform is offered to signal processing module 20, through bite chucking judging module 22 to being out of order the eliminating effect information.If the bite fault is got rid of, instruction returns nominal situation; If the bite fault alleviates, instruction again starts ultrasonic generator 6 and ultrasonic generator 8 and starts timing device simultaneously; If the bite fault does not alleviate, think that this bite fault cause is for the chucking fault, instruction starts the chucking fault and solves pattern.Thereby further save energy and reduce the cost and increase work efficiency.
In the present embodiment, select supersonic transducer is arranged on to the valve body side near the oil outlet side, due to generally low pressure one side alluvial in valve body of contamination particle, so its effect of repairing mechanical bite, chucking fault is better.
Embodiment 2: chucking faut detection and self repair
With reference to Fig. 1, Fig. 3 and Fig. 4, a kind of intelligent hydraulic valve, comprise electro-hydraulic proportional valve 30, and electro-hydraulic proportional valve 30 comprises valve body 35, spool 34, places valve pocket 33 and the proportion electro-magnet 24 of spool.Also comprise ultrasonic generator 2, supersonic transducer 3 and can detect the intelligent controller 1 that the electro-hydraulic proportional valve bite tightens fault and controls ultrasonic generator work.Intelligent controller 1 is electrically connected to ultrasonic generator 2 and electro-hydraulic proportional valve 30 respectively.
The output terminal of ultrasonic generator 6 is electrically connected to two electrodes of supersonic transducer 7, and supersonic transducer 7 is fixedly connected on the upper side of electric-hydraulic proportion valve body 35; Two electrodes of the output terminal of ultrasonic generator 8 and supersonic transducer 9 are connected, and supersonic transducer 9 is fixedly connected on the downside of electro-hydraulic proportional valve 30 valve bodies 35; Two electrodes of the output terminal of ultrasonic generator 10 and supersonic transducer 11 are connected, and supersonic transducer 11 is fixedly connected on the left surface of electro-hydraulic proportional valve 30 valve bodies 35; Two electrodes of the output terminal of ultrasonic generator 12 and supersonic transducer 13 are connected, and supersonic transducer 13 is fixedly connected on the right flank of electro-hydraulic proportional valve 30 valve bodies 35; These four supersonic transducers are oppositely arranged in twos, and the medial axis of the shaft axis of four supersonic transducers and electro-hydraulic proportional valve 30 valve pockets 33 intersects vertically, and four shaft axiss are in same plane.
In the present embodiment, select supersonic transducer is installed on the zone of the corresponding spool in power supply Proportional valve valve body side.Due to the generation of unbalanced pressure radially mainly in spool and the contacted zone of valve pocket, so its effect of repairing hydraulic pressure bite, chucking fault is better.
In the present embodiment, except separately having statement, the other guide of ultrasonic generator, supersonic transducer and the related content of intelligent controller, with embodiment 1, repeat no more herein.
When the chucking fault occurs, bite chucking judging module provides the bite judgement, and ultrasonic generator control module 23 is sent control signal, starts four ultrasonic generators simultaneously and starts timing device simultaneously.This ultrasonic generator and then the supersonic transducer passed through separately solve principle and the mode that machinery tightens, and with embodiment 1, repeat no more herein.
Four ultrasound driving signals that ultrasonic generator continues to send in timing, the transducer passed through respectively separately produces vibration at valve interior surface, thereby spool is formed to uniform suspending power.Because the chucking fault generally causes that by chucking spool bias causes, spool is pressed towards a certain side wall surface, the gap smaller between this side and spool, and the gap between opposite one side and spool becomes large.Now, a side in gap smaller, the effect of pressing due to Ultrasonic Radiation strengthens, active force to spool will become large, and opposite one side Ultrasonic Radiation presses the active force to spool to diminish, the active force that will produce twice on same axis becomes spool a large thruster towards gap, until two side clearance approximately equals.Four sides arrange that four supersonic transducers can guarantee that spool is substantially on the valve pocket medial axis symmetrically and evenly, and the friction factor between valve interior surface and spool significantly reduces, thereby reaches the purpose that solves hydraulic lock.
When after the operating time regularly, the vibrating signal waveform on the common proportion electro-magnet 24 that sampling module 19 continuous acquisition are connected with spool 4, and waveform is offered to signal processing module 20, through bite chucking judging module 22 to being out of order the eliminating effect information.If the chucking fault is got rid of, instruction returns nominal situation; If the chucking fault alleviates, instruction starts chucking fault solution pattern again.
In above-mentioned two embodiments, bite chucking judging module 22 is according to the average value information of frequency, peak-to-peak value, wave distortion and the control signal of the vibrating signal of sampling, by Fuzzy multiple criteria decision-making method, provides the degree of membership judgement of bite, chucking this information output is as follows to ultrasonic generator control module 23:
Due to electro-hydraulic proportional valve when nominal situation, bite operating mode and the chucking operating mode, the value of the electrical signal such as its vibrating signal frequency, peak-to-peak value, wave distortion and mean value is not a fixing value, but in certain interval fluctuation, be difficult to determine its failure condition by the method directly compared, for this reason, adopted the comprehensive foundation of integrated ordered new departure of a kind of Interval Intuitionistic Fuzzy number as the judgement of bite chucking in bite chucking judging module 22.
At first, adopted and used the scoring function Δ, accurately function H and departure function P carry out comprehensively passing judgment on, and establish A={A
1, A
2..., A
mbe the scheme collection, G=(Δ, H, D)
tfor attribute vector, λ=(λ
1, λ
2, λ
3) be each attribute weight vector in G, λ
i∈ [0,1],
Estimating matrix is:
Scheme integrates three kinds of schemes in A three kinds of operating modes as electro-hydraulic proportional valve, respectively nominal situation, bite operating mode and chucking operating mode, frequency, peak-to-peak value, wave distortion and mean value that four kinds of attributes in property set G are vibrating signal, these four kinds of signals are provided by signal processing module 20; In bite chucking judging module, 22 12 bits serial A/D transducer TLV2453 converts 4 road signals digital quantity signal to and passes to data processing chip TMS320VC5402; The weight vectors of index is ω=(0.1,0.5,0.2,0.2)
tthe weight maximum of the peak-to-peak value attribute of vibrating signal, these four weights, are called for data processing chip TMS320VC5402 in the FLASHROM in bite chucking judging module 22 by software solidification, can also by network remote, revise by the RS485 communication interface simultaneously; Attribute weight vector ω is multiplied each other and obtains the comprehensive vector of passing judgment on the evaluation matrix J: B=λ J, sorted according to the size of B element, and press maximum subjection principle selection optimum scheme;
Secondly, the Interval Intuitionistic Fuzzy decision-making concrete steps based on this ranking method are as follows: the first step, and utilize weighting arithmetic to estimate the capable all elements of i in operator (1) Integrated Decision matrix, thereby obtain the comprehensive Interval Intuitionistic Fuzzy value corresponding to option A i; Second step, utilize respectively scoring function, accurate function and the departure function functional value Δ (Ai) that counts the score, accurately functional value H (Ai) and departure function value P (Ai) (i=1,2 ..., m), build and estimate matrix J; The 3rd step, select attribute weight vector λ, calculates the comprehensive vectorial B of judge, sorted according to the size of B element, and press maximum subjection principle and select optimum scheme;
The 3rd, after data processing chip TMS320VC5402 processes, provide the comprehensive judge information of electro-hydraulic proportional valve operating mode, after this information offers ultrasonic generator control module 23, according to different operating modes, go to control whether ultrasonic generator and supersonic transducer work or no whole work.
Said process further improves monotonicity, validity and the sensitivity of bite chucking testing signal, improves in the faut detection of bite chucking, judgement and instruction and carries out accuracy, sensitivity and the reliability on repairing.
Adopt technique scheme, at first, utilize hyperacoustic pneumatics effect to pulverize large contamination particle and dirty grain cake, thereby effectively get rid of mechanical bite, chucking fault; Secondly, utilize the friction factor between the low valve interior surface of Ultrasonic Radiation pressure drop and spool and spool is suspended near the valve pocket medial axis, thereby effectively getting rid of hydraulic pressure bite, chucking fault; The 3rd, adopt ultrasonic processing bite, chucking fault, thereby also save energy and reduce the cost working life of greatly improving equipment easy to use, effective; The 4th, to when starting the judgement of ultrasonic processing apparatus employing intelligent control, realize intermittent duty, under nominal situation, ultrasonic generator and supersonic transducer are in halted state, just start while only having bite chucking fault to be detected, thereby greatly improve the working life of equipment and save energy and reduce the cost; The 5th, with existing similar functions device, compare, simple in structure, with low cost and using effect is good.
[0048] the foregoing is only specific embodiment of the utility model, not to the restriction of this case design, all equivalent variations of doing according to the design key of this case, all fall into the protection domain of this case.
Claims (3)
1. an intelligent hydraulic valve, comprise electro-hydraulic proportional valve, electro-hydraulic proportional valve comprises valve pocket and the proportion electro-magnet of valve body, spool, placement spool, it is characterized in that: also comprise ultrasonic generator, supersonic transducer and can detect the electro-hydraulic proportional valve bite, tighten fault and control the intelligent controller of ultrasonic generator work; Ultrasonic generator and supersonic transducer arrange in pairs, the output terminal of ultrasonic generator is electrically connected to two electrodes of supersonic transducer, totally 4 of supersonic transducers, be fixedly installed in four sides up and down of electric-hydraulic proportion valve body with respect to the medial axis symmetry of electro-hydraulic proportional valve valve pocket, the medial axis of the shaft axis of supersonic transducer and electro-hydraulic proportional valve valve pocket intersect vertically and four shaft axiss in same plane; Intelligent controller is electrically connected to ultrasonic generator and electro-hydraulic proportional valve respectively.
2. a kind of intelligent hydraulic valve as claimed in claim 1, it is characterized in that: described supersonic transducer is installed on the oil outlet side of power supply Proportional valve valve body side.
3. a kind of intelligent hydraulic valve as claimed in claim 1 is characterized in that: described supersonic transducer is installed on the zone of the corresponding spool in power supply Proportional valve valve body side.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102606801A (en) * | 2012-03-31 | 2012-07-25 | 绍兴文理学院 | Intelligent hydraulic valve |
| CN102606801B (en) * | 2012-03-31 | 2013-09-18 | 绍兴文理学院 | Intelligent hydraulic valve |
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