CN202955322U - Hydraulic valve capable of detecting and repairing clamping faults - Google Patents
Hydraulic valve capable of detecting and repairing clamping faults Download PDFInfo
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- CN202955322U CN202955322U CN 201220268119 CN201220268119U CN202955322U CN 202955322 U CN202955322 U CN 202955322U CN 201220268119 CN201220268119 CN 201220268119 CN 201220268119 U CN201220268119 U CN 201220268119U CN 202955322 U CN202955322 U CN 202955322U
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Abstract
The utility model relates to a hydraulic valve capable of detecting and repairing clamping faults. The hydraulic valve comprises a proportional electromagnet, a valve element, a valve body with a valve cavity, an intelligent controller, a plurality of ultrasonic transducers and a special valve wall. The intelligent controller is respectively and electrically connected with the ultrasonic transducers, the proportional electromagnet and the special valve wall. The ultrasonic transducers are fixedly arranged on the outer side faces of the valve body of the hydraulic valve. The axis lines of the ultrasonic transducers are perpendicular to and intersect with the central axis line of the valve cavity in the valve body. The special valve wall comprises an upper valve wall main wall, a lower valve wall main wall, a left valve wall main wall, a right valve wall main wall, four magnetic separating strips and four groups of solenoid coils, wherein the four magnetic separating strips separate the valve wall main walls from each other and are respectively arranged on the four top corners of the valve wall, and the four groups of solenoid coils are provided with magnetic conducting frames and are respectively sleeved on the four valve wall main walls. Through adoption of the technical scheme, the hydraulic valve capable of detecting and repairing the clamping faults is capable of conveniently and accurately forecasting and detecting the clamping faults of the valve element of a slide valve in real time, judging the clamping positions, and convenient and quickly utilizing electromagnetic force to repair the clamping faults caused by pollution and unbalanced radial force, and being simple and convenient to operate and good in use effects.
Description
Technical field
The utility model relates to a kind of hydrovalve, particularly a kind of hydrovalve that detects and repair the chucking fault.
Background technique
Sliding valve core mechanism adopts maximum a kind of structural type in all kinds of hydrovalves.Guiding valve generally comprises spool and valve body, and valve body comprises valve wall and valve pocket.By the position of change spool in the valve pocket of valve body, guiding valve can be realized change and the break-make of direction of flow.Guiding valve chucking fault is one of fault the most common in hydraulic system and failure mode, generally can be divided into hydraulic lock and machinery chucking two large classes.Unbalanced pressure causes because machining causes how much proterties errors of spool and coaxiality error to produce radially in hydraulic lock; Machinery chucking is deposited gradually in the guiding valve gap by the on-the-spot particulate pollutant of operation and causes.The chucking fault has the differentiation of slight and severe.
Guiding valve chucking fault is one of fault the most common in hydraulic system and failure mode.Hydraulic system is as high-power actuator, in case chucking fault, the also even personal safety of entail dangers to equipment of the lighter's thrashing, severe one occur.Therefore, at first, find that in time the chucking fault is most important to the safe operation of hydraulic system; Secondly, more fault can be nipped in the bud to the forecast that tightens fault, significant to the reliability that improves whole system; The 3rd, if the chucking fault occurs, that lateral location that the judgement spool is clamped in valve pocket is also very crucial for the eliminating of chucking fault.
Obtaining of existing guiding valve chucking information is mainly to realize by the detection to hydraulic system pressure, flow, displacement equivalent, belongs to the method for indirect detection diagnosis, can't directly obtain the spool working state.Especially, the factor that affects the parameters such as pressure, flow, displacement is a lot, and chucking is one of them, and therefore the accuracy of chucking detection remains to be weighed.
The scholar who also has proposes to utilize the variation that is superimposed upon the vibrating signal on spool to detect chucking bite fault, this method can realize tightening detection and the forecast of fault to a certain extent, but because it is also to change indirect detection spool mechanical motion state by electromagnetic field, exist the judgement influence factor many, judgment threshold is difficult to the problems such as unified demarcation.
In addition, for the detection of chucking back valve core chucking position, the less report that is seen in.
In prior art, the method for fixing a breakdown mainly contains two kinds: the one, take measures in processing and on-the-spot running, and reduce the probability that breaks down.Rationally offer balancing slit, strict processing and assembling quality etc. on fine filter, spool such as installing in system; Another kind method is exactly that online real-time fault diagnosis and fault are got rid of.
A kind of solenoid directional control valve that HERION company manufactures and designs except its work spool, also has " hammer " spool.During normal operation, " hammer " spool is failure to actuate, and when spool can't playback because of chucking, " hammer " spool knocked the work spool under spring-force driven dual, make its return.The narrow limitation of this scheme is, the compressed machinery spring obtains to knock 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.
In view of this, the inventor is in conjunction with being engaged in hydrovalve area research work experience for many years, and the defective 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 hydrovalve that detects and repair the chucking fault simple in structure, with low cost, can facilitate, accurate, real-time forecast, detect valve core of the spool valve chucking fault, judgement chucking position, and can utilize easily the electromagnetic force reparation by the chucking fault of polluting and the radial force imbalance causes, easy and simple to handle, using effect is good.
To achieve these goals, the technical solution of the utility model is as follows:
A kind of hydrovalve that detects and repair the chucking fault comprises proportion electro-magnet, spool and with the valve body of valve pocket.Also comprise intelligent controller and a plurality of supersonic transducer, valve body comprises special valve wall, and intelligent controller is electrically connected to supersonic transducer, proportion electro-magnet and special valve wall respectively.
Described intelligent controller comprises CPU module, electromagnetic force chucking eliminating module, general proportional amplifier module, ultrasonic chucking failure prediction detection and location module, wireless communication module and power module of voltage regulation; Ultrasonic chucking failure prediction detection and location module comprises high-speed a/d modular converter, echo signal filter and amplification module, ultrasound emission module and multichannel handover module.
wherein, power module of voltage regulation is got rid of module, general proportional amplifier module, ultrasonic chucking failure prediction detection and location module with CPU module, electromagnetic force chucking, wireless communication module is connected and required voltage is provided, CPU module and electromagnetic force chucking is got rid of module, ultrasonic chucking failure prediction detection and location module, wireless communication module, power module of voltage regulation is connected and control the work of whole circuit, wireless communication module is connected with CPU module, general proportional amplifier module is connected with CPU module and proportion electro-magnet, four solenoids that electromagnetic force chucking is got rid of on module and CPU module and four valve wall master walls are connected, ultrasonic chucking failure prediction detection and location module is connected with CPU module and a plurality of ultrasonic transducer, being specially CPU module is connected with the high-speed a/d modular converter and can processes the echo signal of collection, CPU module is connected with the ultrasound emission module and can controls the ultrasonic pulse generation, CPU module and multichannel handover module are connected to be used between a plurality of supersonic transducers and switch ultrasound emission, receive object, the ultrasound emission module is connected with the multichannel handover module, the high-speed a/d modular converter is connected with echo signal filter and amplification module, echo signal filter and amplification module is connected with the multichannel handover module, the multichannel handover module is connected with a plurality of supersonic transducers,
Described supersonic transducer is fixedly installed in the outer side surface of hydraulic valve body, and the medial axis of the shaft axis of supersonic transducer and valve body internal valve cavity intersects vertically; Supersonic transducer and valve body outer side surface directly scribble acoustic coupling medium.
Described special valve wall comprises up and down four valve wall master walls, valve wall master wall is separated and is divided into four of four drift angles of valve wall every tape and four groups of band magnetic conduction frameworks and is enclosed within respectively four solenoids on valve wall master wall; Spool and valve wall master wall are made by the magnet case alloy, are made by magnet case alloy not every tape.
Further, described a plurality of supersonic transducers are the even number more than six, are divided into two rows, are parallel on adjacent two outer side surfaces that are arranged on valve body of valve body internal valve cavity medial axis, and each supersonic transducer on each side is uniformly-spaced arranged.Thereby convenient, accurate, real-time forecast, detection valve core of the spool valve chucking fault, judgement tighten the position, and cost is cheaper, and structure is simpler.
Further, the frequency of described supersonic transducer is more than 10MHz.This design be consider spool and valve wall gap less, thereby more economical realize above-mentioned technique effect.
Further, the A/D converter in described intelligent controller high speed A/D modular converter is selected the A/D chip of ADS5485 or equal performance, and described supersonic transducer is selected normal probe, and described acoustic coupling medium is machine oil.Thereby more economical realize above-mentioned technique effect.
Further, described spool and valve wall master wall are made by high magnetic conductance alloy 1J89, described every tape by YG8 not magnetic conduction import wolfram steel make.Thereby further improve the repairing effect of electromagnetic attraction in the technical program, and using effect is better.
Adopt the technical program to detect the working principle following (Fig. 5 is referring to the description of drawings part) of chucking fault:
Ultrasound is frequency higher than the mechanical wave of 20 kilo hertzs, and this mechanical wave can be propagated with certain speed and direction in material, runs into the different heterogeneous interface of acoustic impedance (as the bottom surface of defective or measured object etc.) and will produce reflection.This reflex can be used to carry out ultrasonic flaw detection, and the most frequently used is the pulse echo defectoscopy.During flaw detection, the voltage that impulse oscillator sends is added in supersonic transducer (ultrasonic probe in other words, the detecting element made from piezoelectric constant or quartz wafer) on, the ultrasonic pulse that supersonic transducer sends enters material and propagates therein by acoustic coupling medium (as machine oil or water etc.), after running into defective, the part reflected energy returns to supersonic transducer along former approach, and supersonic transducer changes it into electrical pulse again.According to position and the amplitude (making comparisons with the reflected wave amplitude of Artificial defect in Reference block) of flaw echo electrical pulse, can measure position and the approximate size of defective.
The utility model is used for reference the mechanism of above-mentioned ultrasonic flaw detection, utilizes ultrasound to realize forecast, detection and the location of spool chucking in the heterogeneous interface reflex.Hydrovalve as shown in Figure 5 is when normal operation, in spool 41 and valve body 40, the medial axis of valve pocket overlaps, the electrical signal that the ultrasound emission module is sent is added on supersonic transducer 50, then the ultrasonic pulse that produces enters the valve wall and propagates therein by acoustic coupling medium (machine oil), gap location between valve wall and spool, because the hydraulic oil in the gap is different with the acoustic impedance of valve wall, ultrasound produces emission at gap location.The part reflected energy returns to supersonic transducer along former incident approach, supersonic transducer changes it into electrical pulse again, CPU module is according to position t1 and the amplitude v1 of the reflected wave electrical pulse that gathers, carry out fuzzy judgment with reference position t and reference amplitude v, and then obtain being nominal situation this moment, there is not the judgement information of chucking fault; And work as hydrovalve due to hydraulic lock or machinery chucking, make spool depart from position, valve pocket medial axis.Gap smaller (the bite operating mode in Fig. 5) between this moment spool and valve wall, CPU module is constant according to position or the boundary position of t1(valve wall of the reflected wave electrical pulse that gathers), and amplitude becomes v2, v1 during with nominal situation compares significantly and reduces, and can forecast that thus the chucking fault has the trend of generation; When the chucking fault occurs, this moment, spool departed from the medial axis far away, and between the valve wall almost (the bite operating mode in Fig. 5) very close to each other, CPU module is according to position or the t1 of the reflected wave electrical pulse that gathers, and amplitude has become v3, if the v3 value is made as the detection threshold of chucking fault, can whether judge lower than v3 the generation that tightens fault by judging reflex amplitude.Otherwise, if the supersonic transducer in Fig. 5 is arranged on opposite one side, hydrovalve is in the process that nominal situation changes to the chucking operating mode, and the value of v1v2v3 is to increase progressively relation, can whether judge higher than v3 the generation that whether side is had the chucking fault by judging reflex amplitude.
As preferably, for more accurate forecast, detection and location chucking fault, on the axial cross section of spool, the position (having 8 kinds of possible orientation at least) that needs at least two supersonic transducers can judge that chucking occurs on this cross section; Because spool is axially having certain length, chucking might occur in any one axial position, and at least 3 transducers on axis can be used for detecting chucking position in the axial direction.
Adopt the working principle of the technical program reparation machinery chucking fault as follows:
When electro-hydraulic proportional valve produces machinery chucking fault, the contamination particle that approaches with the gap size of valve body spool is because of valve body and uneven large the contamination particle of formation that be detained of spool face, be trapped between large particle than granule simultaneously, consist of the dirty grain of dynamic growth cake, both actings in conjunction form common pollution chucking.Spool chucking fault is mainly two kinds of forms of expression, or spool mainly is stuck in some sides of valve pocket, or spool mainly is stuck in certain two side (as above these more serious bi-side of principle analysis are generally adjacent) of valve pocket.We can detect by said apparatus, judge to this.
Mainly be stuck in some sides of valve pocket when the judgement spool, the energising of the solenoid on the valve wall master wall of this that side of opposite, side, make this valve wall master's wall and spool be magnetized, become opposite polarity two blocks of magnet (after the energising of the solenoid on valve wall master wall, valve wall master wall just is equivalent to the iron core in electromagnet, and spool just is equivalent to the armature in electromagnet; Below be the work of electromagnet principle: in electromagnet, iron core and armature are magnetized, and become opposite polarity two blocks of magnet, will produce electromagnetic attraction between them.During greater than the reaction force of spring, armature begins towards direction motion unshakable in one's determination when suction.During less than certain certain value or interruption of power supply, electromagnetic attraction is less than the reaction force of spring when the electric current in coil, and armature will return to original release position under the effect of reaction force), produce electromagnetic attraction between them.During greater than the active force of machinery chucking, spool begins towards the motion of opposite side direction when suction, and gripping orientation is eased.consider that spool relative both sides all produce the situation of polluting in various degree chucking, after the energising of the solenoid on side valve wall master wall certain hour, this solenoid outage, and make subsequently with this side valve wall master's wall opposite valve wall master wall on same time of solenoid energising, so circulation repeatedly, spool is under the effect of electromagnetic force, radially Large Amplitude Vibration along valve pocket, make large contamination particle and a dirty grain cake be subjected to the mechanical vibration effect and fragmentation is decomposed into granule and is melted in hydraulic oil, and taken away slide-valve gear with oil circulation, thereby reach cleaning fluid and remove the purpose that tightens fault, and finally make spool can rest on place, valve pocket medial axis.
mainly be stuck in certain two side (being adjacent) of valve pocket as above-mentioned these more serious bi-side when the judgement spool, the energising of the solenoid on the valve wall master wall of these those both sides, opposite, bi-side, make corresponding valve wall master's wall and spool be magnetized, become opposite polarity two blocks of magnet, (principle that valve wall master's wall and spool are magnetized is with above-mentioned to produce electromagnetic attraction between them, in addition, the centerline direction that the synthetic electromagnetic field direction that produces after two side valve wall energising magnetization is angle, namely 45 the degree directions, also the direction of 45 degree to the polar orientation after the spool magnetization).During greater than the active force of machinery chucking, spool begins towards the diagonal motion when suction, and gripping orientation is eased.consider that the spool surrounding all produces the situation of polluting in various degree chucking, after the energising of the solenoid on two side valve wall master walls certain hour, allow this both sides solenoid cut off the power supply, and make subsequently with this two side valves wall master's wall opposite two side valve wall master walls on same time of solenoid energising, so circulation repeatedly, spool is under the effect of electromagnetic force, radially Large Amplitude Vibration along valve pocket, make large contamination particle and a dirty grain cake be subjected to the mechanical vibration effect and fragmentation is decomposed into granule and is melted in hydraulic oil, and taken away slide-valve gear with oil circulation, thereby reach cleaning fluid and remove the purpose that tightens fault, and finally make spool can rest on place, valve pocket medial axis.
Adopt the working principle of the technical program reparation hydraulic lock fault as follows:
The reason that electro-hydraulic proportional valve produces the hydraulic lock 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 lock.Spool chucking fault is mainly two kinds of forms of expression, or spool mainly is stuck in some sides of valve pocket, or spool mainly is stuck in certain two side (as above these more serious bi-side of principle analysis are generally adjacent) of valve pocket.We can detect by said apparatus, judge to this.
Mainly be stuck in some sides of valve pocket when the judgement spool, the energising of the solenoid on the valve wall master wall of this that side of opposite, side, make this valve wall master's wall and spool be magnetized, become opposite polarity two blocks of magnet, produce electromagnetic attraction (principle that valve wall master's wall and spool are magnetized is with aforementioned) between them.During greater than the active force of hydraulic lock, spool begins towards the motion of opposite side direction when suction, and gripping orientation is eased.after the energising of the solenoid on side valve wall master wall certain hour, allow this solenoid cut off the power supply, and make subsequently with this side valve wall master's wall opposite valve wall master wall on same time of solenoid energising, so circulation repeatedly, spool is under the effect of electromagnetic force, radially Large Amplitude Vibration along valve pocket, making radially, unbalanced pressure is alleviated or is eliminated, thereby spool is got back near the medial axis of valve pocket, friction factor between valve interior surface and spool significantly reduces, avoiding spool to be crushed on valve interior wall can't move, reach the purpose of removing hydraulic lock, and finally make spool can rest on place, valve pocket medial axis.
Mainly be stuck in certain two side (it is generally adjacent as above analyzing these more serious bi-side) of valve pocket when the judgement spool, the energising of the solenoid on the valve wall master wall of these those both sides, opposite, bi-side, make this valve wall master's wall and spool be magnetized, become opposite polarity two blocks of magnet, produce between them electromagnetic attraction (valve wall master's wall and spool is magnetized and the principle of polar orientation with aforementioned).During greater than the active force of hydraulic lock, spool begins towards the diagonal motion when suction, and gripping orientation is eased.after the energising of the solenoid on two side valve wall master walls certain hour, allow this both sides solenoid cut off the power supply, and make subsequently with this two side valves wall master's wall opposite two side valve wall master walls on same time of solenoid energising, so circulation repeatedly, spool is under the effect of electromagnetic force, radially Large Amplitude Vibration along valve pocket, making radially, unbalanced pressure is alleviated or is eliminated, thereby spool is got back near the medial axis of valve pocket, friction factor between valve interior surface and spool significantly reduces, avoiding spool to be crushed on valve interior wall can't move, reach the purpose of removing hydraulic lock, and finally make spool can rest on place, valve pocket medial axis.
When polluting the generation of chucking fault, spool generally can depart from position, valve pocket medial axis, and in order to improve the effect of electromagnetic force de-chucking, the electrical current on the solenoid on that side of close spool or the valve wall of those both sides is smaller.Four Magnetic field distribution when tape is mainly used in improving the solenoid energising weaken the repulsion between same pole.
The utility model is compared following advantage and effect with prior art: 1, the principle with ultrasonic flaw detection applies to the faut detection of hydrovalve chucking, simplicity of design is ingenious, can facilitate, accurate, real-time forecast, detects valve core of the spool valve chucking fault, judgement chucking position and got rid of; 2, above-mentioned detection is non-destructive inspection, need not to change the hydrovalve structure; Forecast, detection and the abort situation that 3, can realize tightening fault are located; 4, directly feed back the spool position information, than indirect detection better reliability; 5, the signal as the chucking faut detection is single, and accuracy is high, and being disturbed property is little; 6, utilize the bi-directional electromagnetic suction of electromagnet that spool is radially vibrated, thereby pulverize large contamination particle and dirty grain cake, the chucking fault decontaminates; 7, utilize the bi-directional electromagnetic suction of electromagnet alleviate or eliminate radially unbalanced pressure, thereby reduce the friction factor between valve interior surface and spool and spool is returned near the medial axis, get rid of the hydraulic lock fault; 8, the direction of chucking is radially, and the utility model is by radial electromagnetic force effect de-chucking fault, and its effect is better than the chucking solution by the axial vibration mode; 9, in the technical program, the final equinoctial point that electromagnetic force can reach is just the nominal situation of Proportional valve, and namely the medial axis coincidence status of spool and valve pocket, therefore adopt the technical program finally can make spool can rest on place, valve pocket medial axis; 10, the technical program has failure prediction, detection and certainly gets rid of function, and the real-time status information of valve, reliability and the working life of having improved hydrovalve can be provided to central control room by wireless transport module online; 11, adopt the technical program, simple in structure, with low cost, easy and simple to handle, 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.
Description of drawings
Fig. 1 is common electro-hydraulic proportional valve structural representation;
Fig. 2 is structural representation of the present utility model;
Fig. 3 is that the utility model is along the sectional drawing of vertical valve core direction of axis line.
Fig. 4 is supersonic transducer mounting point schematic diagram;
Fig. 5-1 is the nominal situation schematic diagram,
Fig. 5-2 are the Line Chart of Fig. 5-1v and t,
Fig. 5-3 be bite operating mode schematic diagram,
Fig. 5-4 are the Line Chart of Fig. 5-3v and t,
Fig. 5-5 for chucking operating mode schematic diagram,
Fig. 5-6 are the Line Chart of Fig. 5-5v and t.
Fig. 6 is the module frame chart of the utility model intelligent controller;
Fig. 7 is the structured flowchart between each module and supersonic transducer in the CPU module of intelligent controller and ultrasonic chucking failure prediction detection and location module.
Embodiment
Below in conjunction with accompanying drawing to enforcement further detailed description of the present utility model.
The structure of common electro-hydraulic proportional valve comprises spool 1 ' and valve body as shown in Figure 1, and valve body comprises valve pocket 2 ' and valve wall 3 '.As for miscellaneous part, generally also comprise proportional amplifier 5 ', proportion electro-magnet 4 '.Proportion electro-magnet 4 ' can be also single, replaces with Returnning spring at the other end.Proportion electro-magnet matches with spool, passing ratio solenoid actuated spool.The moving iron core of general proportion electro-magnet 4 ' heads on spool 1 '.By the position of change spool 1 ' in the valve pocket of valve body, Proportional valve can be realized change and the break-make of direction of flow.Above-mentioned is prior art, repeats no more herein.
To shown in Figure 7, be preferred embodiment of the present utility model as Fig. 2.
A kind of hydrovalve that detects and repair the chucking fault comprises proportion electro-magnet 30, spool 41 and with the valve body 40 of valve pocket 42.Above-mentioned is the state of the art, repeats no more herein.
As shown in Figure 2, also comprise intelligent controller 10 and a plurality of supersonic transducer 50, valve body comprises special valve wall 43, and intelligent controller 10 is electrically connected to supersonic transducer 50, proportion electro-magnet 30 and special valve wall 43 respectively.
As Fig. 6, shown in Figure 7, intelligent controller 10 comprises CPU module 20, electromagnetic force chucking eliminating module 21, general proportional amplifier module (adopting RT-5001 in the present embodiment) 22, ultrasonic chucking failure prediction detection and location module 23, wireless communication module 24 and power module of voltage regulation 25; Ultrasonic chucking failure prediction detection and location module 23 comprises high-speed a/d modular converter 232, echo signal filter and amplification module 233, ultrasound emission module 234 and multichannel handover module 235.
Wherein, power module of voltage regulation 25 is connected and required voltage is provided with CPU module 20, electromagnetic force chucking eliminating module 21, general proportional amplifier module 22, ultrasonic chucking failure prediction detection and location module 23, wireless communication module 24; CPU module 20 and electromagnetic force chucking is got rid of module 21, ultrasonic chucking failure prediction detection and location module 23, wireless communication module 24, power module of voltage regulation 25 is connected and control the work of whole circuit; Wireless communication module 24 is connected with CPU module 20; General proportional amplifier module 22 is connected with CPU module 20 and proportion electro-magnet 30; Four solenoids that electromagnetic force chucking is got rid of on module 21 and CPU module 20 and four valve wall master walls 43 are connected;
ultrasonic chucking failure prediction detection and location module 23 is connected with CPU module 20 and a plurality of ultrasonic transducer 50, being specially CPU module 20 is connected with high-speed a/d modular converter 232 and can processes the echo signal of collection, CPU module 20 is connected with ultrasound emission module 234 and can controls the ultrasonic pulse generation, CPU module and multichannel handover module 235 are connected to be used between a plurality of supersonic transducers 50 and switch ultrasound emission, receive object, ultrasound emission module 234 is connected with multichannel handover module 235, high-speed a/d modular converter 232 is connected with echo signal filter and amplification module 233, echo signal filter and amplification module 233 is connected with multichannel handover module 235, multichannel handover module 235 is connected with a plurality of supersonic transducers 50,
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.Intelligent controller 10 is connected respectively the aviation plug that adopts 2 cores or 4 cores and is connected with supersonic transducer; Intelligent controller 10 is connected by 7 cores or 12 core plugs with proportion electro-magnet 30.Intelligent controller 10 connects by 2 core aviation plugs with four solenoids that are connected on valve wall 43.The moving iron core of proportion electro-magnet 30 heads on spool 41.
Consider that spool and valve wall gap are less, the frequency of supersonic transducer is at least more than 10MHz.Supersonic transducer and valve body outer side surface directly scribble acoustic coupling medium, are machine oil in the present embodiment.This design be on the one hand consider spool and valve wall gap less, thereby more economical realize above-mentioned technique effect, be to consider to realize better supersonic sounding effect with less cost on the other hand, and detection, judged result are more accurate.
Supersonic transducer is selected normal probe, and Couplant is machine oil; A/D converter in the high-speed a/d modular converter is selected the A/D chip of ADS5485 or equal performance.
Special valve wall comprises up and down four valve wall master walls 431, valve wall master wall is separated and is divided into four of four drift angles of valve wall every tape 432 and four groups of band magnetic conduction frameworks and is enclosed within respectively four solenoids 433 on valve wall master wall, the i.e. solenoids of belt coil.Spool and valve wall master wall are made by the magnet case alloy, are made by magnet case alloy not every tape.
In the present embodiment, electro-hydraulic proportional valve along the sectional drawing of vertical valve core direction of axis line as shown in Figure 3.The 41st, spool is made by high hardness, high magnetic conductance alloy 1J89; The 42nd, valve pocket; The 432nd, by YG8 not magnetic conduction import wolfram steel make every tape, totally four, on four drift angles of rectangular cross-section, its size is as shown in the figure respectively; The 431st, the valve wall master wall by high hardness, high magnetic conductance alloy 1J89 make, separated every tape, and four forms valve body valve wall jointly every tape totally by four; 433 is solenoids of four groups of band magnetic conduction frameworks, and namely the solenoid of belt coil, be enclosed within respectively on four valve wall master walls 431.Thereby further improve the repairing effect of electromagnetic attraction in the technical program, realize better technique effect with lower cost.
Embodiment 1: the failure prediction of machinery chucking, detection, location and eliminating certainly (a side chucking):
In present embodiment, the wireless communication module 24 of intelligent controller receives from the given signal of central control room and sends signal to CPU module 20; CPU module 20 is delivered to general proportional amplifier module 22 with this signal; General proportional amplifier module 22 makes hydrovalve work through processing of circuit output power signal to proportion electro-magnet 30 according to this signal.Regularly produce ultrasonic pulse encourages six ultrasonic transducers and detection of echoes signal (being the reflected wave electrical pulse) to ultrasonic chucking failure prediction detection and location module 23 in turn, and this echo signal and reference signal amplitude are compared differentiation, when departing from the regime values scope, send failure prediction to CPU module 20.CPU module 20 driving wireless communication modules 24 send to central control room with this failure prediction and carry out fault pre-alarming.If ultrasonic chucking failure prediction detection and location module 23 detects echo signal and drops on the chucking number range, except sending trouble report to CPU module 20, also will detect simultaneously the occurrence positions of chucking fault---determine the chucking position of this plane normal direction by the echo values that compares three place's supersonic transducers on same plane, and this information is sent to CPU module 20.CPU module 20 according to the energising number of four solenoids on four valve wall master walls 431 of this signal deciding, sequentially, size of current, current"on"time and frequency, and this information is delivered to the electromagnetic force chucking gets rid of module 21.The electromagnetic force chucking is got rid of module 21 makes corresponding solenoid energising enforcement chucking fault get rid of accordingly.Intelligent controller detects spool chucking fault by ultrasonic chucking failure prediction detection and location module, judges that simultaneously spool is stuck in which or two inner side surfaces of valve pocket.
Suppose that spool mainly is stuck in the A side of valve pocket (left side shown in Figure 3 namely marks 431 and 432 sides), this that side of opposite, side is B side (right side shown in Figure 3).433 energisings of the solenoid on B side valves wall master wall make valve wall master wall 431 and the spool 41 of this coil winding be magnetized, and become opposite polarity two blocks of magnet, produce electromagnetic attraction between them.During greater than the active force of machinery chucking, spool begins towards the motion of B side direction when suction, and gripping orientation is eased.the AB both sides of considering spool all produce the situation of polluting in various degree chucking, after the solenoid 433 energising certain hours on B side valves wall master wall, this solenoid outage, and make subsequently the same time of solenoid 433 energising on A side valves wall master wall 431 (as preferably, little than on B side solenoid of electrical current on A side solenoid, thereby improve the effect of electromagnetic attraction de-chucking), so circulation repeatedly, spool 41 is under the effect of electromagnetic force, radially (A is to B) Large Amplitude Vibration along valve pocket 42, make large contamination particle and a dirty grain cake be subjected to the mechanical vibration effect and fragmentation is decomposed into granule and is melted in hydraulic oil, and taken away slide-valve gear with oil circulation, thereby reach cleaning fluid and remove the purpose that tightens fault, and finally make spool can rest on place, valve pocket medial axis.
Embodiment 2: hydraulic lock failure prediction, detection, location and eliminating certainly (a side chucking)
In present embodiment, the wireless communication module 24 of intelligent controller receives from the given signal of central control room and sends signal to CPU module 20; CPU module 20 is delivered to general proportional amplifier module 22 with this signal; General proportional amplifier module 22 makes hydrovalve work through processing of circuit output power signal to proportion electro-magnet 30 according to this signal.Regularly produce ultrasonic pulse encourages six ultrasonic transducers and detection of echoes signal to ultrasonic chucking failure prediction detection and location module 23 in turn, and this echo signal and benchmark calibration signal are compared differentiation, when departing from the regime values scope, send failure prediction to CPU module 20.CPU module 20 driving wireless communication modules 24 send to central control room with this failure prediction and carry out fault pre-alarming.If ultrasonic chucking failure prediction detection and location module 23 detects echo signal and drops on the chucking number range, except sending trouble report to CPU module 20, also will detect simultaneously the occurrence positions of chucking fault---determine the chucking position of this plane normal direction by the echo values that compares three place's supersonic transducers on same plane, and this information is sent to CPU module 20.CPU module 20 according to the energising number of four solenoids on four valve wall master walls 431 of this signal deciding, sequentially, size of current, current"on"time and frequency, and this information is delivered to the electromagnetic force chucking gets rid of module 21.The electromagnetic force chucking is got rid of module 21 makes corresponding solenoid energising enforcement chucking fault get rid of accordingly.Intelligent controller detects spool chucking fault by ultrasonic chucking failure prediction detection and location module, judges that simultaneously spool is stuck in which or two inner side surfaces of valve pocket.
Suppose that spool mainly is stuck in the A side of valve pocket (left side shown in Figure 3 namely marks 431 and 432 sides), this that side of opposite, side is B side (right side shown in Figure 3).433 energisings of the solenoid on B side valves wall master wall make valve wall master wall 431 and the spool 41 of this coil winding be magnetized, and become opposite polarity two blocks of magnet, produce electromagnetic attraction between them.During greater than the active force of hydraulic lock, spool begins towards the motion of B side direction when suction, and gripping orientation is eased.after the solenoid 433 energising certain hours on B side valves wall master wall, this solenoid outage, and make subsequently the same time of solenoid 433 energising on A side valves wall master wall 431 (as preferably, little than on B side solenoid of electrical current on A side solenoid, thereby improve the effect of electromagnetic attraction de-chucking), so circulation repeatedly, spool 41 is under the effect of electromagnetic force, radially (A is to B) Large Amplitude Vibration along valve pocket 42, making radially, unbalanced pressure is alleviated or is eliminated, thereby spool is got back near the medial axis of valve pocket, friction factor between valve interior surface and spool significantly reduces, avoiding spool to be crushed on valve interior wall can't move, reach the purpose of removing hydraulic lock, and finally make spool can rest on place, valve pocket medial axis.
In above-mentioned two embodiments, in ultrasonic chucking failure prediction detection and location module 23, each module and CPU module 20 tighten the working procedure of failure prediction, detection and location such as following.
The working procedure of chucking failure prediction and detection is as follows:
Hydrovalve is installed that side surface wiped clean of supersonic transducer, spread machine oil, six supersonic transducers are placed along the equidistant average line in valve pocket medial axis of hydrovalve;
When using for the first time, first spool is adjusted to nominal situation (medial axis of spool and valve pocket overlaps); Supersonic transducer 50 is connected with multichannel handover module 235, starts CPU module 20 work; CPU module 20 at first follow procedure is controlled No. 1 supersonic transducer of multichannel handover module 235 connections; Then starting ultrasound emission module 234 sends electrical signal and is added on No. 1 supersonic transducer, the ultrasonic pulse that No. 1 supersonic transducer is excited to produce enters the valve wall and propagates therein by acoustic coupling medium (machine oil), gap location between valve wall and spool, because the hydraulic oil in the gap is different with the acoustic impedance of valve wall, ultrasound produces emission at gap location.The part reflected energy returns to supersonic transducer No. 1 along former incident approach, No. 1 supersonic transducer changes it into electrical pulse again, and this electrical pulsing signal is input to high-speed a/d modular converter 232 after by echo signal filter and amplification module 233 and is converted to digital quantity and sends to CPU module 20.CPU module 20 records and preserves reference signal sequence as this monitoring point with the reflected wave electrical pulse that gathers.According to hydrovalve and ultrasound parameter, calculate the echo position in gap between spool valve wall, the reference signal amplitude when extracting corresponding amplitude in reference signal sequence as nominal situation according to this position.
Then hydrovalve is adjusted to the chucking operating mode and repeated above-mentioned steps, corresponding reference signal amplitude when obtaining tightening operating mode.
Repeat by above program for other 5 supersonic transducers, finally obtain the complete reference signal sequence of 6 monitoring points.
When the chucking fault occurs, spool and a certain side valve wall contact, the gap between this side valve core and valve wall is close to and disappears, at this moment, when central processing unit (CPU) module 20 follow procedures carry out ultrasound detection to this monitoring point, the echo signal that collects is compared with the reference signal amplitude of chucking operating mode after treatment, can forecast and detect the generation of chucking fault by Fuzzy Processing, its order of severity etc.
The working procedure of chucking fault localization is as follows:
Hydrovalve is installed that side surface wiped clean of supersonic transducer, spread machine oil, six supersonic transducers are placed along the equidistant average line in valve pocket medial axis of hydrovalve;
When using for the first time, first spool is adjusted to nominal situation (medial axis of spool and valve pocket overlaps); Supersonic transducer 50 is connected with multichannel handover module 235, starts CPU module 20 work; CPU module 20 at first follow procedure is controlled No. 1 supersonic transducer of multichannel handover module 235 connections; Then starting ultrasound emission module 234 sends electrical signal and is added on No. 1 supersonic transducer, the ultrasonic pulse that No. 1 supersonic transducer is excited to produce enters the valve wall and propagates therein by acoustic coupling medium (machine oil), gap location between valve wall and spool, because the hydraulic oil in the gap is different with the acoustic impedance of valve wall, ultrasound produces emission at gap location.The part reflected energy returns to supersonic transducer No. 1 along former incident approach, No. 1 supersonic transducer changes it into electrical pulse again, and this electrical pulsing signal is input to high-speed a/d modular converter 232 after by echo signal filter and amplification module 233 and is converted to digital quantity and sends to CPU module 20.CPU module 20 records and preserves reference signal sequence as this monitoring point with the reflected wave electrical pulse (being echo signal) that gathers.According to hydrovalve and ultrasound parameter, calculate the echo position in gap between spool valve wall, the reference signal amplitude when extracting corresponding amplitude in reference signal sequence as nominal situation according to this position.
Then hydrovalve is adjusted to the chucking operating mode and repeated above-mentioned steps, corresponding reference signal amplitude when obtaining tightening operating mode.Repeat by above program for other 5 supersonic transducers, finally obtain the complete reference signal sequence of 6 monitoring points.
When the chucking fault occurs, spool and a certain side valve wall contact, the gap between this side valve core and valve wall is close to and disappears, at this moment, when central processing unit (CPU) module 20 follow procedures carry out ultrasound detection to this monitoring point, the echo signal that collects is compared with the reference signal amplitude of chucking operating mode after treatment, can judge that by Fuzzy Processing the chucking fault occurs.Press above program for all the other 5 and all can draw the judgement that whether tightens, the comprehensive chucking situation of these 6 points, the chucking position that can draw spool.
The working principle of above-mentioned location is as follows: when chucking occured, the part of spool and valve wall pressure were tight, almost there is no the space between the two; And leave the space between remaining part and valve wall.When ultrasonic echo detected, the size in space can be by analysis draws to ultrasonic echo feature like this.Bull ultrasonic probe along from poppet shaft to distributing installation can obtain the chucking information of this tangent plane.If along the more ultrasonic probe of spool circumferencial direction distributing installation, just can obtain the steric information about chucking, the position of spool chucking also can accurately be located in three dimensional space.
The above is only specific embodiment of the utility model, is not the restriction to this case design, and all equivalent variations of doing according to the design key of this case all fall into the protection domain of this case.
Claims (5)
1. one kind can be detected and repair the hydrovalve that tightens fault, comprise proportion electro-magnet, spool and with the valve body of valve pocket, it is characterized in that: also comprise intelligent controller and a plurality of supersonic transducer, valve body comprises special valve wall, and intelligent controller is electrically connected to supersonic transducer, proportion electro-magnet and special valve wall respectively;
Described intelligent controller comprises CPU module, electromagnetic force chucking eliminating module, general proportional amplifier module, ultrasonic chucking failure prediction detection and location module, wireless communication module and power module of voltage regulation; Ultrasonic chucking failure prediction detection and location module comprises high-speed a/d modular converter, echo signal filter and amplification module, ultrasound emission module and multichannel handover module;
wherein, power module of voltage regulation is got rid of module, general proportional amplifier module, ultrasonic chucking failure prediction detection and location module with CPU module, electromagnetic force chucking, wireless communication module is connected and required voltage is provided, CPU module and electromagnetic force chucking is got rid of module, ultrasonic chucking failure prediction detection and location module, wireless communication module, power module of voltage regulation is connected and control the work of whole circuit, wireless communication module is connected with CPU module, general proportional amplifier module is connected with CPU module and proportion electro-magnet, four solenoids that electromagnetic force chucking is got rid of on module and CPU module and four special valve walls are connected, ultrasonic chucking failure prediction detection and location module is connected with CPU module and a plurality of ultrasonic transducer, being specially CPU module is connected with the high-speed a/d modular converter and can processes the echo signal of collection, CPU module is connected with the ultrasound emission module and can controls the ultrasonic pulse generation, CPU module and multichannel handover module are connected to be used between a plurality of supersonic transducers and switch ultrasound emission, receive object, the ultrasound emission module is connected with the multichannel handover module, the high-speed a/d modular converter is connected with echo signal filter and amplification module, echo signal filter and amplification module is connected with the multichannel handover module, the multichannel handover module is connected with a plurality of supersonic transducers,
Described supersonic transducer is fixedly installed in the outer side surface of hydraulic valve body, and the medial axis of the shaft axis of supersonic transducer and valve body internal valve cavity intersects vertically; Supersonic transducer and valve body outer side surface directly scribble acoustic coupling medium;
Described special valve wall comprises up and down four valve wall master walls, valve wall master wall is separated and is divided into four of four drift angles of valve wall every tape and four groups of band magnetic conduction frameworks and is enclosed within respectively four solenoids on valve wall master wall; Spool and valve wall master wall are made by the magnet case alloy, are made by magnet case alloy not every tape.
As claimed in claim 1 a kind of detect and repair the chucking fault hydrovalve, it is characterized in that: described a plurality of supersonic transducers are the even number more than six, be divided into two rows, be parallel on adjacent two outer side surfaces that are arranged on valve body of valve body internal valve cavity medial axis, each supersonic transducer on each side is uniformly-spaced arranged.
As claimed in claim 1 or 2 a kind of detect and repair the chucking fault hydrovalve, it is characterized in that: the frequency of described supersonic transducer is more than 10MHz.
As claimed in claim 3 a kind of detect and repair the chucking fault hydrovalve, it is characterized in that: the A/D converter in described intelligent controller high speed A/D modular converter is selected the A/D chip of ADS5485 or equal performance, described supersonic transducer is selected normal probe, and described acoustic coupling medium is machine oil.
As claimed in claim 3 a kind of detect and repair the chucking fault hydrovalve, it is characterized in that: described spool and valve wall master wall are made by high magnetic conductance alloy 1J89, described every tape by YG8 not magnetic conduction import wolfram steel make.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220268119 CN202955322U (en) | 2012-06-08 | 2012-06-08 | Hydraulic valve capable of detecting and repairing clamping faults |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201220268119 CN202955322U (en) | 2012-06-08 | 2012-06-08 | Hydraulic valve capable of detecting and repairing clamping faults |
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| CN202955322U true CN202955322U (en) | 2013-05-29 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102734243A (en) * | 2012-06-08 | 2012-10-17 | 绍兴文理学院 | Hydraulic valve capable of detecting and repairing chucking fault |
| CN112113002A (en) * | 2020-08-21 | 2020-12-22 | 欧路莎股份有限公司 | Ultrasonic switching integrated valve for ultrasonic jet cleaning device |
-
2012
- 2012-06-08 CN CN 201220268119 patent/CN202955322U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102734243A (en) * | 2012-06-08 | 2012-10-17 | 绍兴文理学院 | Hydraulic valve capable of detecting and repairing chucking fault |
| CN102734243B (en) * | 2012-06-08 | 2014-08-13 | 绍兴文理学院 | Hydraulic valve capable of detecting and repairing chucking fault |
| CN112113002A (en) * | 2020-08-21 | 2020-12-22 | 欧路莎股份有限公司 | Ultrasonic switching integrated valve for ultrasonic jet cleaning device |
| CN112113002B (en) * | 2020-08-21 | 2022-04-19 | 欧路莎股份有限公司 | Ultrasonic switching integrated valve for ultrasonic jet cleaning device |
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