CN102734528B

CN102734528B - Method for intelligently detecting and repairing hydraulic valve chucking failure

Info

Publication number: CN102734528B
Application number: CN 201210187034
Authority: CN
Inventors: 李伟波; 张华芳
Original assignee: University of Shaoxing
Current assignee: University of Shaoxing
Priority date: 2012-06-08
Filing date: 2012-06-08
Publication date: 2013-09-04
Anticipated expiration: 2032-06-08
Also published as: CN102734528A

Abstract

The invention relates to a method for intelligently detecting and repairing a hydraulic valve chucking failure, which comprises the following steps: reconstruction, mounting, reference calibration, detection and repairing. In the reconstruction step: the valve wall of the valve body is reconstructed into a specially-made valve wall; in the mounting step, a plurality of ultrasonic transducers are fixedly mounted on the outer side surface of the valve body; and in the repairing step, a central processing unit module of an intelligent controller determines the electrifying direction, electrifying number, sequence, current magnitude, electrifying time, frequency and the like of solenoid coils on a valve core magnetizer and four solenoid coils on the specially-made valve wall according to a chucking signal transmitted by the detection step, so that the corresponding solenoid coils are electrified, thereby clearing the chucking failure. The technical scheme can be used for conveniently and accurately predict and detect the slide valve core chucking failure and judge the chucking position in real time, and electromagnetic force can be conveniently utilized to repair the chucking failure caused by pollution and radial force imbalance; and thus, the invention is simple to operate and has favorable use effect.

Description

A kind of Intelligent Measurement is also repaired the method that hydrovalve tightens fault

Technical field

The present invention relates to a kind of method, particularly a kind of Intelligent Measurement of relevant hydrovalve chucking fault and repair the method that hydrovalve tightens 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 changing the position of 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 common faults and failure mode the most in the hydraulic system, generally can be divided into hydraulic lock and machinery chucking two big classes.Unbalanced pressure causes because machining causes how much proterties sum of errors of spool coaxiality error to produce radially in hydraulic lock; The machinery chucking is then 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 common faults and failure mode the most in the hydraulic system.Hydraulic system is as high-power actuator, in case appearance chucking fault, the lighter's thrashing, weight person goes back entail dangers to equipment even personal safety.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 takes place, that lateral location that the judgement spool is clamped in the valve pocket is also very crucial for the chucking troubleshooting of faults.

Obtaining of existing guiding valve chucking information mainly is 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 influences 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 the spool to detect chucking bite fault, this method can realize tightening detection and the forecast of fault to a certain extent, but because it also is to change indirect detection spool mechanical motion state by electromagnetic field, exist the decision influence factor many, judgment threshold is difficult to problems such as unified demarcation.

In addition, for the detection of chucking back valve core chucking position, the then less report that is seen in.

In the prior art, the method for fixing a breakdown mainly contains two kinds: the one, in processing and on-the-spot running, take measures, and reduce the probability that breaks down.Rationally offer balancing slit, strict processing and assembling quality etc. on fine filter, the spool such as in system, installing; Another kind method is exactly that online real time fail 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 proper functioning, " hammer " spool is failure to actuate, and when spool can't playback because of chucking, " hammer " spool knocked the work spool under the spring force effect, make its return.The narrow limitation of this scheme is, owing to be that the compressed machinery spring obtains to knock energy when powering on, " hammer " spool is hammer action for once, and is unidirectional, can't guarantee the fault eliminating, 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.

Summary of the invention

The object of the present invention is to provide a kind of Intelligent Measurement simple in structure, with low cost and repair the method that hydrovalve tightens fault, can make things convenient for, accurate, real-time forecast, detect valve core of the spool valve chucking fault, judge the chucking position, and can utilize the electromagnetic force reparation by the chucking fault of polluting and the radial force imbalance causes easily, easy and simple to handle, using effect is good.

To achieve these goals, technological scheme of the present invention is as follows:

A kind of Intelligent Measurement is also repaired the method that hydrovalve tightens fault, and hydrovalve comprises the valve body of proportion electro-magnet, spool and band valve pocket.

Comprise adaptation step, installation steps, demarcation benchmark step, detect step and repair step, specific as follows:

Wherein adaptation step refers to, the valve wall of valve body is transformed into special valve wall, 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 four solenoids on the valve wall master wall respectively, spool and valve wall master wall are made by the magnet case alloy, are made by magnet case alloy not every tape; Add the cartridge spool magnetizing assembly between spool and proportion electro-magnet, the spool magnetizing assembly comprises solenoid and the cylindrical shaft core of band magnetic conduction framework, and axle core and spool are made one, and the axle core is made by the magnet case alloy.

Installation steps wherein refer to a plurality of supersonic transducers are 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; Described supersonic transducer and valve body outer side surface directly scribble acoustic coupling medium; Described a plurality of supersonic transducer is the even number more than six, is divided into two rows, is parallel on adjacent two outer side surfaces that are installed in valve body of valve body internal valve cavity medial axis, and each supersonic transducer on each side is uniformly-spaced arranged.

Wherein demarcate the benchmark step, refer to by intelligent controller and the supersonic transducer that is subjected to its control, carry out the operation of the amplitude output control of the ultrasound detection control of intelligent controller and intelligent controller, when obtaining monitoring point, a plurality of supersonic transducers place nominal situation and the complete reference signal amplitude when tightening operating mode.

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, power module of voltage regulation and magnetization control module; Ultrasonic chucking failure prediction detection and location module comprises high-speed a/d modular converter, echo signal filtering 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, wireless communication module with CPU module, electromagnetic force chucking, the magnetization control module links to each other 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, the magnetization control module links to each other and control the work of entire circuit; Wireless communication module links to each other with CPU module; General proportional amplifier module links to each other with CPU module and proportion electro-magnet; Four solenoids that electromagnetic force chucking is got rid of on module and CPU module and the four valve wall master walls link to each other; The magnetization control module links to each other with solenoid on CPU module and the spool magnetizing assembly; Ultrasonic chucking failure prediction detection and location module links to each other with CPU module and a plurality of ultrasonic transducer, being specially CPU module links to each other with the high-speed a/d modular converter and can handle the echo signal of collection, CPU module links to each other with the ultrasound emission module and can control the ultrasonic pulse generation, CPU module and multichannel handover module link to each other to be used between a plurality of supersonic transducers and switch ultrasound emission, receive object, the ultrasound emission module links to each other with the multichannel handover module, the high-speed a/d modular converter links to each other with echo signal filtering amplification module, echo signal filtering amplification module links to each other with the multichannel handover module, and the multichannel handover module links to each other with a plurality of supersonic transducers.

Intelligent controller is electrically connected with supersonic transducer, proportion electro-magnet, spool magnetizing assembly and special valve wall respectively;

The ultrasound detection control of described intelligent controller, refer to that the CPU module follow procedure at first controls the multichannel handover module and connect a certain supersonic transducer, starting the ultrasound emission module then sends electrical signal and is added on this supersonic transducer, the ultrasonic pulse that this supersonic transducer is excited to produce enters the valve wall by acoustic coupling medium and propagates therein, 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 this supersonic transducer along former incident approach, this supersonic transducer changes it into electrical pulse again, this electrical pulsing signal is input to the high-speed a/d modular converter after by echo signal filtering amplification module and is converted to digital quantity and sends to CPU module, and the reflected wave electrical pulse record that CPU module will be gathered is also preserved.

The amplitude output control of described intelligent controller, refer to the CPU module follow procedure of intelligent controller, the reflected wave electrical pulse of record and preservation at first the ultrasound detection of intelligent controller being controlled, burst as this monitoring point, secondly according to hydrovalve and ultrasound parameter, calculate the echo position in gap between spool valve wall, at last according to the signal amplitude of the corresponding amplitude in this position information extraction burst as this monitoring point.

Wherein detect step, refer to the general operating mode at hydrovalve, the ultrasonic chucking failure prediction detection and location module of controlling the CPU module of intelligent controller encourages a plurality of ultrasonic transducers regularly to produce ultrasonic pulse and detection of echoes signal (being the reflected wave electrical pulse) in turn, ultrasonic chucking failure prediction detection and location module tightens differentiation control of failure ratio with this echo signal and reference signal amplitude, finally send the failure prediction signal or send the failure prediction signal and the chucking signal to CPU module, CPU module driving wireless communication module sends to central control room with this failure prediction signal and carries out fault pre-alarming;

Described chucking failure ratio is differentiated control, refer to echo signal (being the reflected wave electrical pulse) after the amplitude-frequency analysing and processing and during nominal situation and during the chucking operating mode reference signal amplitude of correspondence compare; During reference signal amplitude range when detecting echo signal and depart from nominal situation, send the failure prediction signal to CPU module; Drop on the reference signal amplitude range of chucking during operating mode when detecting echo signal, except sending to CPU module the failure prediction signal, also determine the chucking position of this plane normal direction by the echo signal numerical value of the above supersonic transducer in three places on the more same plane, detection obtains tightening the occurrence positions of fault, and sends the chucking signal to CPU module.

Wherein repairing step refers to, the CPU module of intelligent controller is according to detecting the chucking signal that step is sent, determine the energising direction, energising number of solenoid on the spool magnetizing assembly and four solenoids on the special valve wall, in proper order, size of current, current"on"time and frequency etc., and this information delivered to the spool magnetizing assembly and the electromagnetic force chucking is got rid of module.Spool magnetizing assembly and electromagnetic force chucking eliminating module are moved accordingly corresponding solenoid energising enforcement chucking fault are got rid of.

Further, in the described demarcation benchmark step by intelligent controller and the supersonic transducer that is subjected to its control, carry out the ultrasound detection control of intelligent controller and the amplitude of intelligent controller and export the operation of controlling, refer to comprise demarcate normal benchmark step and demarcate tighten the benchmark step; Wherein demarcate normal benchmark step, refer to hydrovalve is adjusted to nominal situation, be about to spool and adjust to the medial axis coincidence of spool and valve pocket, ultrasound detection control by intelligent controller, and the amplitude of intelligent controller output control, the reference signal amplitude of correspondence when obtaining signal amplitude as monitoring point, particular ultrasound transducer place nominal situation repeats aforesaid operations, the complete reference signal amplitude when finally obtaining monitoring point, a plurality of supersonic transducers place nominal situation; Wherein demarcate chucking benchmark step, refer to hydrovalve is adjusted to the chucking operating mode, ultrasound detection control by intelligent controller, and the amplitude of intelligent controller output control, the reference signal amplitude of correspondence when obtaining signal amplitude as monitoring point, particular ultrasound transducer place chucking operating mode, repeat aforesaid operations, the complete reference signal amplitude when finally obtaining monitoring point, a plurality of supersonic transducers place chucking operating mode.

Further, in the described demarcation benchmark step by intelligent controller and the supersonic transducer that is subjected to its control, carry out the ultrasound detection control of intelligent controller and the amplitude of intelligent controller and export the operation of controlling, refer to comprise as follows: hydrovalve is adjusted to nominal situation, be about to spool and adjust to the medial axis coincidence of spool and valve pocket, ultrasound detection control by intelligent controller, and the amplitude of intelligent controller output control, the reference signal amplitude of correspondence when obtaining signal amplitude as monitoring point, particular ultrasound transducer place nominal situation; Hydrovalve is adjusted to the chucking operating mode, by the ultrasound detection control of intelligent controller, and the amplitude of intelligent controller output control, the reference signal amplitude of correspondence when obtaining signal amplitude as monitoring point, particular ultrasound transducer place chucking operating mode; Repeat aforesaid operations, when finally obtaining monitoring point, a plurality of supersonic transducers place nominal situation and the complete reference signal amplitude during the chucking operating mode.

Further, described spool magnetizing assembly and electromagnetic force chucking eliminating module are moved accordingly corresponding solenoid energising enforcement chucking fault are got rid of, refer to that spool magnetizing assembly 60 takes spool magnetization control to make spool be magnetized to N or S magnetic pole accordingly, the electromagnetic force chucking is got rid of module and is taked valve wall magnetization control to make four valve wall master walls all be magnetized to the magnetic pole identical with spool accordingly, produce the electromagnetic repulsion force that differs in size between spool and four valve wall master walls, thereby make spool begin to move to the medial axis direction of valve pocket, alleviate gripping orientation; Perhaps, the electromagnetic force chucking is got rid of module and is taked valve wall magnetization control to make four valve wall master walls all be magnetized to N or S magnetic pole accordingly, the spool magnetizing assembly takes spool magnetization control that spool is magnetized to and the identical magnetic pole of valve wall master wall accordingly, produce the electromagnetic repulsion force that differs in size between spool and four valve wall master walls, thereby make spool begin to move to the medial axis direction of valve pocket, alleviate gripping orientation.

Described spool magnetization control refers to, to solenoid 61 energisings on the spool magnetizing assembly, control the current direction in this solenoid, just be magnetized to N or S magnetic pole equally with being inserted in the spool 41 that axle core in the solenoid is magnetized to N or S magnetic pole and axle core 62 one.

Described valve wall magnetization control refers to that four solenoids on four valve wall master walls are switched on simultaneously, and each coil current equates, controls the current direction in four solenoids, makes four valve wall master walls be geomagnetic into N or S magnetic pole.

Further, described spool magnetizing assembly 60 and electromagnetic force chucking eliminating module 21 are moved accordingly corresponding solenoid energising enforcement chucking fault are got rid of, also comprise and take discontinuous cycle control, described discontinuous cycle control refers to, behind the solenoid 433 energising certain hours on the solenoid 61 of spool magnetizing assembly 60 and the four valve wall master walls 431, make each solenoid outage certain hour simultaneously, continue to implement above-mentioned reparation step then, so circulation repeatedly, make spool 41 under the effect of electromagnetic force, along the radially significantly vibration of valve pocket 42.Consider that the relative both sides of spool all produce the situation of chucking in various degree, adopt technique scheme can make big contamination particle and a dirty grain cake be subjected to the mechanical vibration effect and fragmentation is decomposed into granule and is melted in the hydraulic oil, and taken away slide-valve gear with fluid circulation, and then reach cleaning fluid and remove the purpose that machinery tightens fault, and finally make spool can rest on place, valve pocket medial axis; Can making radially, unbalanced pressure is alleviated or is eliminated, thereby spool is suspended near the medial axis of valve pocket, friction factor between valve interior surface and the spool significantly reduces, avoiding spool to be crushed on the 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.

Further, described spool magnetizing assembly and electromagnetic force chucking eliminating module are moved accordingly corresponding solenoid energising enforcement chucking fault are got rid of, refer to that the spool magnetizing assembly takes spool magnetization control to make spool be magnetized to N or S magnetic pole accordingly, the electromagnetic force chucking is got rid of module and is taked valve wall magnetization control accordingly, make the valve wall master wall of chucking side, opposite be magnetized to the magnetic pole opposite with spool, produce electromagnetic attraction between the valve wall master wall of spool and chucking side, opposite, thereby make spool begin to move to the medial axis direction of valve pocket, alleviate gripping orientation; Perhaps electromagnetic force chucking eliminating module takes valve wall magnetization control to make the valve wall master wall of chucking side, opposite be magnetized to N or S magnetic pole accordingly, the spool magnetizing assembly is taked spool magnetization control that spool is magnetized to accordingly and is tightened the opposite magnetic pole of valve wall master wall of side, opposite, produce electromagnetic attraction between the valve wall master wall of spool and chucking side, opposite, thereby make spool begin to move to the medial axis direction of valve pocket, alleviate gripping orientation.

Described spool magnetization control refers to, solenoid on the spool magnetizing assembly is switched on, control the current direction in this solenoid, just be magnetized to N or S magnetic pole equally with being inserted in the spool that axle core in the solenoid is magnetized to N or S magnetic pole and axle core one.

Described valve wall magnetization control refers to, some or two sides at the spool chucking place of valve pocket are the chucking side, a side or two sides on chucking opposite, side are chucking side, opposite, to the energising of the solenoid on the valve wall master wall of chucking side, opposite, current direction in the control solenoid makes the valve wall master wall of chucking side, opposite be geomagnetic into N or S magnetic pole.

Further, described spool magnetizing assembly and electromagnetic force chucking eliminating module are moved accordingly corresponding solenoid energising enforcement chucking fault are got rid of, also comprise and take double vibrations control, described double vibrations control refers to, behind the energising of the solenoid on the valve wall master wall of chucking side, opposite certain hour, make this solenoid outage, and the solenoid on the valve wall master wall that tightens the side is switched on the same time, so circulation repeatedly, make spool under the effect of electromagnetic force, along the radially significantly vibration of valve pocket.Consider that the relative both sides of spool all produce the situation of chucking in various degree, adopt technique scheme, can make big contamination particle and a dirty grain cake be subjected to the mechanical vibration effect and fragmentation is decomposed into granule and is melted in the hydraulic oil, and taken away slide-valve gear with fluid circulation, and then reach cleaning fluid and remove the purpose that machinery tightens fault, and finally make spool can rest on place, valve pocket medial axis; Can 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 the spool significantly reduces, avoiding spool to be crushed on the 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.

Further, the electrical current of the solenoid on the valve wall master wall of chucking side is littler than the electrical current of the solenoid on the valve wall master wall of chucking side, opposite in the described double vibrations control.Thereby improve the effect of electromagnetic attraction de-chucking.

Further, described Frequency for Ultrasonic Energy Transducer is more than 10MHz.This design is to consider that spool and valve wall gap are less, thus the above-mentioned technique effect of more economical realization.

Further, the A/D converter in the described intelligent controller high speed A/D modular converter is selected the A/D chip of ADS5485 or equal performance for use, and described supersonic transducer is selected normal probe for use, and described acoustic coupling medium is machine oil.Thereby the above-mentioned technique effect of more economical realization.

Further, described spool is made by high magnetic conductance alloy 1J87, and described valve wall master's wall and cylindrical shaft core 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 force 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 that frequency is higher than 20 kilo hertzs mechanical wave, 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, be the detecting element made from piezoelectric constant or quartz wafer) on, the ultrasonic pulse that supersonic transducer sends enters material by acoustic coupling medium (as machine oil or water etc.) and propagates therein, after running into defective, the part reflected energy returns 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 the Reference block) of flaw echo electrical pulse, can measure position and the approximate size of defective.

The present invention uses 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 proper functioning, the medial axis of valve pocket overlaps in spool 41 and the valve body 40, the electrical signal that the ultrasound emission module is sent is added on the supersonic transducer 50, the ultrasonic pulse of Chan Shenging enters the valve wall by acoustic coupling medium (machine oil) and propagates therein then, 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 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 of gathering, carry out fuzzy judgment with reference position t and reference amplitude v, and then obtain being nominal situation this moment, there is not chucking failure judgment information; And work as hydrovalve because hydraulic lock or machinery chucking make spool depart from position, valve pocket medial axis.Gap smaller (the bite operating mode among Fig. 5) between this moment spool and the valve wall, CPU module still is that the boundary position of t1(valve wall is constant according to the position of the reflected wave electrical pulse of gathering), 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 takes place, this moment, spool departed from the medial axis far away, and between the valve wall almost (the bite operating mode among Fig. 5) very close to each other, CPU module is according to position or the t1 of the reflected wave electrical pulse of gathering, and amplitude has become v3, if the v3 value is made as the detection threshold that tightens fault, then can whether be lower than the generation that v3 judges the chucking fault by judging reflex amplitude.Otherwise, if the supersonic transducer among Fig. 5 is installed in opposite one side, then in chucking operating mode transforming process, the value of v1 v2 v3 then is to increase progressively relation to hydrovalve at nominal situation, then can whether be higher than whether v3 judges the chucking fault to the side generation by judging reflex amplitude.

As preferably, for more accurate forecast, detection and location chucking fault, on the axial cross section of spool, need two supersonic transducers can judge in position that this cross section chucking takes place (have at least 8 kinds may orientation) at least; Because spool is axially having certain length, chucking might occur in any one axial position, and at least 3 transducers on the 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 big the contamination particle of formation that be detained of spool face, be trapped between large particle than granule simultaneously, constitute 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 generally are adjacent) of valve pocket.We can detect, judge by said apparatus to this.

When judging that spool mainly is stuck in the some of valve pocket or two sides, the axle core that is inserted in the solenoid is magnetized in the then solenoid of spool magnetizing assembly energising, makes the spool that links to each other with the axle core be magnetized to S or N magnetic pole.Simultaneously, four solenoids on the valve wall master wall are switched on simultaneously, and each coil current equates.The current direction of controlling in four solenoids makes valve wall master wall be geomagnetic into the magnetic pole identical with spool.At this moment spool becomes two blocks of identical magnet of polarity with valve wall master wall, produces electromagnetic repulsion force between them.The electromagnetic repulsion force that one or two side of pressing close to spool is subjected to is bigger, and the electromagnetic repulsion force of all the other several side is less, and when repulsion during greater than the active force of machinery chucking, spool begins the medial axis direction motion to valve pocket, and gripping orientation is eased.Consider that the relative both sides of spool all produce the situation of polluting chucking in various degree, behind the energising of the solenoid on spool magnetizing assembly and four side valve wall master walls certain hour, make each solenoid outage certain hour simultaneously, so circulation repeatedly, spool is under the effect of electromagnetic force, radially significantly vibration along valve pocket, make big contamination particle and a dirty grain cake be subjected to the mechanical vibration effect and fragmentation is decomposed into granule and is melted in the hydraulic oil, and taken away slide-valve gear with fluid circulation, thereby reach cleaning fluid and remove the purpose that tightens fault, and finally make spool can rest on place, valve pocket medial axis.

Certain above-mentioned electromagnetic force also can be electromagnetic attraction, it is constant namely to start the spool magnetization, and only make solenoid energising on the valve wall master wall of one or both sides on some or opposite, two sides at valve pocket chucking place, make this corresponding valve wall master wall be magnetized, and the current direction in the control solenoid, make spool and valve wall master wall become opposite polarity two blocks of magnet, produce electromagnetic attraction between them.When suction during greater than the active force of machinery chucking, spool begins towards opposite side or diagonal motion, and gripping orientation is eased.Consider the relative both sides of spool or all produce the situation of polluting chucking in various degree all around, behind the energising of the solenoid on the valve wall master wall of one or both sides certain hour, this solenoid outage, and make the same time of solenoid energising on the valve wall master wall of one or both sides, opposite (as preferably subsequently, electrical current on latter's solenoid little than on the former solenoid, thereby improve the effect of electromagnetic attraction de-chucking), so circulation repeatedly, spool is under the effect of electromagnetic force, along the radially significantly vibration of valve pocket, its effect is the same.

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 sum of errors of spool 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 generally are adjacent) of valve pocket.We can detect, judge by said apparatus to this.

When judging that spool mainly is stuck in the some of valve pocket or two sides, the axle core that is inserted in the solenoid is magnetized in the then solenoid of spool magnetizing assembly energising, makes the spool that links to each other with the axle core be magnetized to S or N magnetic pole.Simultaneously, four solenoids on the valve wall master wall are switched on simultaneously, and each coil current equates.The current direction of controlling in four solenoids makes valve wall master wall be geomagnetic into the magnetic pole identical with spool.At this moment spool becomes two blocks of identical magnet of polarity with valve wall master wall, produces electromagnetic repulsion force between them.The electromagnetic repulsion force that one or two side of pressing close to spool is subjected to is bigger, and the electromagnetic repulsion force of all the other several side is less, and when repulsion during greater than the active force of machinery chucking, spool begins the medial axis direction motion to valve pocket, and gripping orientation is eased.Behind the energising of the solenoid on spool magnetizing assembly and four side valve wall master walls certain hour, make each solenoid outage certain hour simultaneously, so circulation repeatedly, spool is under the effect of electromagnetic force, radially significantly vibration along valve pocket, making radially, unbalanced pressure is alleviated or is eliminated, thereby spool is suspended near the medial axis of valve pocket, friction factor between valve interior surface and the spool significantly reduces, avoiding spool to be crushed on the 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.

Certain above-mentioned electromagnetic force also can be electromagnetic attraction, it is constant namely to start the spool magnetization, and only make solenoid energising on the valve wall master wall of one or both sides on some or opposite, two sides at valve pocket chucking place, make this corresponding valve wall master wall be magnetized, and the current direction in the control solenoid, make spool and valve wall master wall become opposite polarity two blocks of magnet, produce electromagnetic attraction between them.When suction during greater than the active force of hydraulic lock, spool begins towards opposite side or diagonal motion, and gripping orientation is eased.Behind the energising of the solenoid on the valve wall master wall of one or both sides certain hour, allow this solenoid cut off the power supply, and make the same time of solenoid energising on the valve wall master wall of one or both sides, opposite (as preferably subsequently, electrical current on latter's solenoid little than on the former solenoid, thereby improve the effect of electromagnetic attraction de-chucking), so circulation repeatedly, spool is under the effect of electromagnetic force, radially significantly vibration along valve pocket, make radially that unbalanced pressure is alleviated or eliminates, thereby reach as above-mentioned technique effect.

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 present invention compares 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 make things convenient for, accurate, real-time forecast, detect valve core of the spool valve chucking fault, judges the chucking position and got rid of; 2, above-mentioned detection is non-destructive inspection, need not to change the hydrovalve structure; 3, can realize tightening forecast, detection and the abort situation location of fault; 4, directly feed back the spool position information, than indirect detection better reliability; 5, the signal as the chucking faut detection is single, and the accuracy height is subjected to interference little; 6, utilize the bi-directional electromagnetic suction of electromagnet that spool is radially vibrated, thereby pulverize big contamination particle and dirty grain cake, the chucking fault decontaminates; 7, utilize the bi-directional electromagnetic suction of electromagnet to alleviate or eliminate radially unbalanced pressure, thereby reduce the friction factor between valve interior surface and the spool and spool is returned near the medial axis, get rid of the hydraulic lock fault; 8, Ka Jin direction is radially, and the present invention 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 just is the nominal situation of Proportional valve, and namely therefore the medial axis coincidence status of spool and valve pocket adopts the technical program finally can make spool can rest on place, valve pocket medial axis; 10, the technical program has failure prediction, detection and online from getting rid of function, and can provide the real-time status information of valve, reliability and the working life of having improved hydrovalve to central control room by wireless transport module; 11, adopt the technical program, simple in structure, with low cost, easy and simple to handle, using effect is good.

Technological scheme of the present invention the present invention is described in further detail below in conjunction with drawings and Examples in order further to explain.

Description of drawings

Fig. 1 is common electrical liquid proportional valve arrangement schematic representation;

Fig. 2 is for implementing the structural representation of hydrovalve of the present invention;

When Fig. 3 repairs for implementing electromagnetic force among the present invention along the sectional drawing of vertical valve core direction of axis line;

Fig. 4 is supersonic transducer mounting point schematic representation;

Fig. 5 is chucking faut detection working principle schematic representation among the present invention;

Fig. 6 is the module frame chart of intelligent controller among the present invention;

Fig. 7 is the structured flowchart between each module and the supersonic transducer in the CPU module of intelligent controller and the ultrasonic chucking failure prediction detection and location module;

Fig. 8 is the structural representation of spool magnetizing assembly.

Embodiment

Below in conjunction with accompanying drawing to enforcement further detailed description of the present invention.

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 ' also can be 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 changing the position of 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.

Extremely shown in Figure 8 as Fig. 2, be to implement the related structure of hydrovalve of technical solution of the present invention and the schematic representation of principle.

A kind of Intelligent Measurement is also repaired the method that hydrovalve tightens fault, and hydrovalve comprises the valve body 40 of proportion electro-magnet 30, spool 41 and band valve pocket 42, and above-mentioned is the state of the art, repeats no more herein.

Wherein adaptation step refers to, the valve wall of valve body is transformed into special valve wall 43, special valve wall 43 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 four solenoids 433 on the valve wall master wall, the i.e. solenoids of belt coil respectively.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, hydrovalve 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 of being made by high hardness, high magnetic conductance alloy 1J89, totally four, separated every tape and four form valve body valve wall jointly every tape; 433 is solenoids of four groups of band magnetic conduction frameworks, and namely the solenoid of belt coil is enclosed within respectively on four valve wall master walls 431.Thereby further improve the repairing effect of electromagnetic attraction in the technical program, realize preferable technique effect with lower cost.Four Magnetic field distribution when tape is mainly used in improving the solenoid energising weaken the repulsion between same pole.

As Fig. 2, shown in Figure 8, adaptation step also comprises spool magnetizing assembly 60 is installed between spool 41 and the proportion electro-magnet 30.Spool magnetizing assembly 60 comprises that the solenoid 61(of band magnetic conduction framework is the solenoid of belt coil) and cylindrical shaft core 62, axle core 62 and spool 41 are made one.The axle core is made by the magnet case alloy.In the present embodiment, the structure of spool magnetizing assembly 60 is made up of the cylindrical shaft core 62 that the solenoid 61 of being with the magnetic conduction framework and high magnetic conductance alloy 1J89 make as shown in Figure 8; Axle core 62 and spool 41 are made one, and the mode of making one has a lot, and only otherwise influencing magnetized axle core 62 drives the magnetization of spools 41 homopolarities and get final product, in the present embodiment, both are connected, and the shaft axis coincidence namely can be considered as the axle core extension of spool.Thereby further improve the repairing effect of electromagnetic force in the technical program, and using effect is better.

Four Magnetic field distribution when tape is mainly used in improving the solenoid energising weaken the repulsion between same pole.The soft magnetic material that axle core in the spool magnetizing assembly and spool adopt is respectively high magnetic conductance alloy 1J89 and high magnetic conductance alloy 1J87, wherein the magnetic property of 1J87 is better than 1J89, She Ji purpose is to improve solenoid magnetic field on every side, energising back respectively like this, improves the magnetization effect of spool.

The push rod that is noted that existing proportion electro-magnet is the two-part that separate with spool, and proportion electro-magnet energising rear push-rod promotes valve core movement in proportion.In the technical program, in the spool magnetizing assembly, the axle core of spool and spool magnetizing assembly is made one, and the magnetic conduction ability of spool section material is stronger, purpose is the Magnetic field distribution when improving the energising of spool magnetizing assembly, adds the magnetization degree of forcing that section of spool material.The push rod of the proportion electro-magnet in the technical program promotes axle core (and spool) motion of spool magnetizing assembly under nominal situation.

In the present embodiment, supersonic transducer 50 is fixedly installed in the outer side surface of hydraulic valve body 40, and the medial axis of the shaft axis of supersonic transducer and valve body internal valve cavity 42 intersects vertically.Quantity, the concrete distribution of ultrasonic ring energy device can have multiple.As shown in Figure 4, a plurality of supersonic transducers 50 are the even number more than six, are divided into two rows, are parallel on adjacent two outer side surfaces that are installed in valve body 40 of valve body internal valve cavity medial axis, and each supersonic transducer on each side is uniformly-spaced arranged.In the present embodiment, as shown in Figure 4, totally six ultrasonic transducers are by central piezo ceramic element, the front and back metal cover board, the prestressing force screw rod, electrode slices and insulation tube are formed, and are divided into outer upper side and external right side face that two rows are installed on hydraulic valve body, supersonic transducer on each side is three and drops on the straight line, this straight line is parallel with valve body internal valve cavity medial axis, and ultrasonic transduction implement body mounting point is in this surperficial both sides and neutral position, and three supersonic transducers are uniformly-spaced arranged.Thereby convenient, accurate, real-time forecast, detection valve core of the spool valve chucking fault, judgement chucking position, and cost is cheaper, and structure is simpler.

Consider that spool and valve wall gap are less, Frequency for Ultrasonic Energy 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 is to consider that spool and valve wall gap are less on the one hand, thereby the above-mentioned technique effect of more economical realization is 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 for use, 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 for use.

Wherein demarcate the benchmark step, refer to by intelligent controller and the supersonic transducer that is subjected to its control, carry out the operation of the amplitude output control of the ultrasound detection control of intelligent controller and intelligent controller, when obtaining monitoring point, a plurality of supersonic transducers place nominal situation and the complete reference signal amplitude when tightening operating mode.Its specific implementation method has multiple, sees specifying in the following working procedure for details.

In the present embodiment, as shown in Figure 2, intelligent controller 10, a plurality of supersonic transducer 50 and spool magnetizing assembly 60, valve body comprise special valve wall 43, and intelligent controller 10 is electrically connected with supersonic transducer, proportion electro-magnet 30, spool magnetizing assembly 60 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, power module of voltage regulation 25 and magnetization control module 26; Ultrasonic chucking failure prediction detection and location module 23 comprises high-speed a/d modular converter 232, echo signal filtering amplification module 233, ultrasound emission module 234 and multichannel handover module 235.

Wherein, power module of voltage regulation 25 is got rid of module 21, general proportional amplifier module 22, ultrasonic chucking failure prediction detection and location module 23, wireless communication module 24 with CPU module 20, electromagnetic force chucking, magnetization control module 26 links to each other and required voltage is provided; CPU module 20 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 magnetized the work that control module 26 links to each other and controls entire circuit with the electromagnetic force chucking; Wireless communication module 24 links to each other with CPU module 20; General proportional amplifier module 22 links to each other 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 the four valve wall master walls 431 link to each other; Magnetization control module 26 links to each other with solenoid on CPU module 20 and the spool magnetizing assembly 60.

Ultrasonic chucking failure prediction detection and location module 23 links to each other with CPU module 20 and a plurality of ultrasonic transducer 50, being specially CPU module 20 links to each other with high-speed a/d modular converter 232 and can handle the echo signal of collection, CPU module 20 links to each other with ultrasound emission module 234 and can control the ultrasonic pulse generation, CPU module and multichannel handover module 235 link to each other to be used between a plurality of supersonic transducers 50 and switch ultrasound emission, receive object, ultrasound emission module 234 links to each other with multichannel handover module 235, high-speed a/d modular converter 232 links to each other with echo signal filtering amplification module 233, echo signal filtering amplification module 233 links to each other with multichannel handover module 235, and multichannel handover module 235 links to each other with a plurality of supersonic transducers 50;

Realize each module of above-mentioned functions, structures such as its concrete circuit, components and parts owing to belong to prior art, just repeat no more herein.Intelligent controller 10 adopts the aviation plug of 2 cores or 4 cores to be connected with supersonic transducer 50 respectively; Intelligent controller 10 links to each other by 7 cores or 12 core plugs with proportion electro-magnet 30.Four solenoids on intelligent controller 10 and the special valve wall 43 and the solenoid on the spool magnetizing assembly 60 are connected by 2 core aviation plugs.The moving iron core of proportion electro-magnet 30 heads on the axle core 62 of spool magnetizing assembly.

The ultrasound detection control of described intelligent controller, refer to that the CPU module follow procedure at first controls the multichannel handover module and connect a certain supersonic transducer, starting the ultrasound emission module then sends electrical signal and is added on this supersonic transducer, the ultrasonic pulse that this supersonic transducer is excited to produce enters the valve wall by acoustic coupling medium and propagates therein, 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 this supersonic transducer along former incident approach, this supersonic transducer changes it into electrical pulse again, this electrical pulsing signal is input to the high-speed a/d modular converter after by echo signal filtering amplification module and is converted to digital quantity and sends to CPU module, and the reflected wave electrical pulse record that CPU module will be gathered is also preserved;

The amplitude output control of described intelligent controller, refer to the CPU module follow procedure of intelligent controller, the reflected wave electrical pulse of record and preservation at first the ultrasound detection of intelligent controller being controlled, burst as this monitoring point, secondly according to hydrovalve and ultrasound parameter, calculate the echo position in gap between spool valve wall, at last according to the signal amplitude of the corresponding amplitude in this position information extraction burst as this monitoring point;

Wherein detect step, refer to the general operating mode at hydrovalve, the ultrasonic chucking failure prediction detection and location module 23 of controlling the CPU module of intelligent controller encourages a plurality of ultrasonic transducers regularly to produce ultrasonic pulse and detection of echoes signal (being the reflected wave electrical pulse) in turn, ultrasonic chucking failure prediction detection and location module 23 tightens differentiation control of failure ratio with this echo signal and reference signal amplitude, finally send the failure prediction signal or send the failure prediction signal and the chucking signal to CPU module 20, CPU module 20 driving wireless communication modules 24 send to central control room with this failure prediction signal and carry out fault pre-alarming;

Described chucking failure ratio is differentiated control, refer to echo signal (being the reflected wave electrical pulse) after the amplitude-frequency analysing and processing and during nominal situation and during the chucking operating mode reference signal amplitude of correspondence compare; During reference signal amplitude range when detecting echo signal and depart from nominal situation, send (the detection here of failure prediction signal to CPU module 20, just send the failure prediction signal in the time of can being the reference signal amplitude range of the echo signal that detects certain monitoring point, supersonic transducer place correspondence when departing from this monitoring point nominal situation, also can be whole detections, after the echo signal that obtains all monitoring points, the supersonic transducer place information that corresponding reference signal amplitude is compared during with this monitoring point nominal situation, handle by fuzzy algorithmic approach, draw and just send the failure prediction signal when echo signal departs from the reference signal amplitude range); Drop on the reference signal amplitude range of chucking during operating mode when detecting echo signal, except (the detection here to CPU module 20 sends the failure prediction signal, the reference signal amplitude when being the chucking operating mode except comparison other, all the other are the same), also determine the chucking position of this plane normal direction by the echo signal numerical value of the above supersonic transducer in three places on the more same plane, detection obtains tightening the occurrence positions of fault, and sends the chucking signal to CPU module 20.Above-mentioned amplitude-frequency analysing and processing is specially frequecny domain analysis and amplitude analysis, and these analytical technologies all belong to prior art, repeat no more herein.Above-mentioned fuzzy algorithmic approach belongs to prior art, repeats no more herein.

Wherein repairing step refers to, the CPU module 20 of intelligent controller is according to detecting the chucking signal that step is sent, determine the energising direction, energising number of solenoid 61 on the spool magnetizing assembly 60 and four solenoids on the special valve wall 43, in proper order, size of current, current"on"time and frequency etc., and this information delivered to spool magnetizing assembly 60 and the electromagnetic force chucking is got rid of module 21.Spool magnetizing assembly 60 and electromagnetic force chucking eliminating module 21 are moved accordingly corresponding solenoid energising enforcement chucking fault are got rid of.

Described spool magnetizing assembly 60 and electromagnetic force chucking eliminating module 21 are moved accordingly corresponding solenoid energising enforcement chucking fault are got rid of, and its specific implementation method has multiple, in the present embodiment, specifically introduces following several:

One, here segmentation can have two kinds again: one, refer to that spool magnetizing assembly 60 takes spool magnetization control to make spool be magnetized to N or S magnetic pole accordingly, the electromagnetic force chucking is got rid of module and is taked valve wall magnetization control to make four valve wall master walls all be magnetized to the magnetic pole identical with spool accordingly, produce the electromagnetic repulsion force that differs in size between spool and four valve wall master walls, thereby make spool begin to move to the medial axis direction of valve pocket, alleviate gripping orientation; Two, refer to that perhaps electromagnetic force tightens the eliminating module and takes valve wall magnetization control to make four valve wall master walls all be magnetized to N or S magnetic pole accordingly, spool magnetizing assembly 60 takes spool magnetization control that spool is magnetized to and the identical magnetic pole of valve wall master wall accordingly, produce the electromagnetic repulsion force that differs in size between spool and four valve wall master walls, thereby make spool begin to move to the medial axis direction of valve pocket, alleviate gripping orientation;

Described spool magnetization control refers to, to solenoid 61 energisings on the spool magnetizing assembly, control the current direction in this solenoid, just be magnetized to N or S magnetic pole equally with being inserted in the spool 41 that axle core in the solenoid is magnetized to N or S magnetic pole and axle core 62 one; Described valve wall magnetization control refers to that four solenoids on four valve wall master walls are switched on simultaneously, and each coil current equates, controls the current direction in four solenoids, makes four valve wall master walls be geomagnetic into N or S magnetic pole.

In addition, in the said method, also can comprise and take discontinuous cycle control, the control of described discontinuous cycle refers to, behind the solenoid 433 energising certain hours on the solenoid 61 of spool magnetizing assembly 60 and the four valve wall master walls 431, makes each solenoid outage certain hour simultaneously, continue to implement above-mentioned reparation step then, so circulation makes spool 41 under the effect of electromagnetic force repeatedly, along the radially significantly vibration of valve pocket 42.Consider that the relative both sides of spool all produce the situation of chucking in various degree, adopt technique scheme can make big contamination particle and a dirty grain cake be subjected to the mechanical vibration effect and fragmentation is decomposed into granule and is melted in the hydraulic oil, and taken away slide-valve gear with fluid circulation, and then reach cleaning fluid and remove the purpose that machinery tightens fault, and finally make spool can rest on place, valve pocket medial axis; Can making radially, unbalanced pressure is alleviated or is eliminated, thereby spool is suspended near the medial axis of valve pocket, friction factor between valve interior surface and the spool significantly reduces, avoiding spool to be crushed on the 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.

They are two years old, here segmentation can have two kinds again: one, refer to that spool magnetizing assembly 60 takes spool magnetization control to make spool be magnetized to N or S magnetic pole accordingly, the electromagnetic force chucking is got rid of module and is taked valve wall magnetization control accordingly, make the valve wall master wall of chucking side, opposite be magnetized to the magnetic pole opposite with spool, produce electromagnetic attraction between the valve wall master wall of spool and chucking side, opposite, thereby make spool begin to move to the medial axis direction of valve pocket, alleviate gripping orientation; Two, refer to that perhaps electromagnetic force tightens the eliminating module and takes valve wall magnetization control to make the valve wall master wall of chucking side, opposite be magnetized to N or S magnetic pole accordingly, spool magnetizing assembly 60 is taked spool magnetization control that spool is magnetized to accordingly and is tightened the opposite magnetic pole of valve wall master wall of side, opposite, produce electromagnetic attraction between the valve wall master wall of spool and chucking side, opposite, thereby make spool begin to move to the medial axis direction of valve pocket, alleviate gripping orientation;

Described spool magnetization control refers to, to solenoid 61 energisings on the spool magnetizing assembly, control the current direction in this solenoid, just be magnetized to N or S magnetic pole equally with being inserted in the spool 41 that axle core in the solenoid is magnetized to N or S magnetic pole and axle core 62 one; Described valve wall magnetization control refers to, some or two sides at the spool chucking place of valve pocket are the chucking side, a side or two sides on chucking opposite, side are chucking side, opposite, to the energising of the solenoid on the valve wall master wall of chucking side, opposite, current direction in the control solenoid makes the valve wall master wall of chucking side, opposite be geomagnetic into N or S magnetic pole.

In addition, in the said method, also can comprise and take double vibrations control, described double vibrations control refers to, behind the energising of the solenoid on the valve wall master wall of chucking side, opposite certain hour, makes this solenoid outage, and the solenoid on the valve wall master wall that tightens the side is switched on the same time, so circulation makes spool under the effect of electromagnetic force repeatedly, along the radially significantly vibration of valve pocket.Consider that the relative both sides of spool all produce the situation of chucking in various degree, adopt technique scheme, can make big contamination particle and a dirty grain cake be subjected to the mechanical vibration effect and fragmentation is decomposed into granule and is melted in the hydraulic oil, and taken away slide-valve gear with fluid circulation, and then reach cleaning fluid and remove the purpose that machinery tightens fault, and finally make spool can rest on place, valve pocket medial axis; Can 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 the spool significantly reduces, avoiding spool to be crushed on the 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.

Embodiment 1: the failure prediction of machinery chucking, detection, location and eliminating (side chucking) certainly:

In the 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 arrives proportion electro-magnet 30 according to this signal through processing of circuit output power control signal, this moment magnetizing assembly 60 solenoid 61 no electric circuits, the moving iron core pushing shaft core 62 of proportion electro-magnet 30 also drives spool 41 and moves by given control signal and make the hydrovalve proper functioning.

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 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 the trouble report to CPU module 20, also will detect the occurrence positions of chucking fault simultaneously---determine the chucking position of this plane normal direction by the echo values of three place's supersonic transducers on the more same plane, and this information is sent to CPU module 20.CPU module 20 is according to the solenoid 61 on this signal deciding spool magnetizing assembly 60 and four solenoids 5 on the special valve wall 43,6,7,8 energising direction, electric current, time and frequency, and this information delivered to spool magnetizing assembly 60 and the electromagnetic force chucking is got rid of module 21.Spool magnetizing assembly 60 and electromagnetic force chucking eliminating module 21 are moved accordingly corresponding solenoid energising enforcement chucking fault are got rid of.

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, and solenoid 8 is arranged on it), then this that side of opposite, side is B side (there is solenoid 6 on right side shown in Figure 3 on it).Then 61 energisings of the solenoid on the spool magnetizing assembly 60, the spool 41 that axle core 62 is magnetized to N magnetic pole and axle core 62 one is magnetized to the N magnetic pole equally.Four groups of (5,6,7,8) solenoid 433 energisings simultaneously, make the four side valve wall master walls 431 that twined by solenoid 433 all be geomagnetic into the N magnetic pole, spool 41 becomes two blocks of identical magnet of polarity with four side valve wall master walls 431, produces electromagnetic repulsion force between them.When repulsion during greater than the active force of machinery chucking, spool begins to the motion of valve pocket medial axis direction, and gripping orientation is eased.The AB both sides of considering spool all produce the situation of polluting chucking in various degree, behind the solenoid 61 and the 433 energising certain hours of the solenoid on the four side valve wall master walls 431 of magnetizing assembly 60, make each solenoid outage certain hour simultaneously, so circulation repeatedly, spool 41 is under the effect of electromagnetic force, radially (A is to B) along valve pocket 42 significantly vibrates, make big contamination particle and a dirty grain cake be subjected to the mechanical vibration effect and fragmentation is decomposed into granule and is melted in the hydraulic oil, and taken away slide-valve gear with fluid circulation, thereby reach cleaning fluid and remove the purpose that tightens fault, and finally make spool can rest on place, valve pocket medial axis.Especially, supersonic transducer is pressed from spool magnetizing assembly 60 distances from the near to the remote with supersonic transducer called after 50a, 50b, 50c on the same plane, if detected chucking fault point is respectively when 50a, 50b, 50c position, electrical current on the corresponding solenoid 5,6,7,8 is ia, ib, ic, and ia＜ib＜ic.

Certain above-mentioned electromagnetic force also can be electromagnetic attraction, it is constant namely to start spool 41 magnetization, and the solenoid 433 on the B side valves wall master wall 433 is switched on, and make B side valve wall master's wall 431 and spool 41 become opposite polarity two blocks of magnet, produce electromagnetic attraction between them.When suction during greater than the active force of machinery chucking, spool begins towards the motion of B side direction, and gripping orientation is eased.Consider that the relative both sides of spool all produce the situation of polluting chucking in various degree, behind the energising of the solenoid on B side valve wall master wall certain hour, this solenoid outage, and make the same time of solenoid energising on the A side valve wall master wall (as preferably subsequently, electrical current on the A side solenoid little than on the B side solenoid, thereby improve the effect of electromagnetic attraction de-chucking), so circulation repeatedly, spool is under the effect of electromagnetic force, along the radially significantly vibration of valve pocket, its effect is the same.

Embodiment 2: hydraulic lock failure prediction, detection, location and eliminating (side chucking) certainly

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 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 the trouble report to CPU module 20, also will detect the occurrence positions of chucking fault simultaneously---determine the chucking position of this plane normal direction by the echo values of three place's supersonic transducers on the more same plane, and this information is sent to CPU module 20.CPU module 20 is according to the solenoid 62 on this signal deciding spool magnetizing assembly 60 and four solenoids 5 on the special valve wall 43,6,7,8 energising direction, electric current, time and frequency, and this information delivered to spool magnetizing assembly 60 and the electromagnetic force chucking is got rid of module 21.Spool magnetizing assembly 60 and electromagnetic force chucking eliminating module 21 are moved accordingly corresponding solenoid energising enforcement chucking fault are got rid of.

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, and solenoid 8 is arranged on it), then this that side of opposite, side is B side (there is solenoid 6 on right side shown in Figure 3 on it).Then 61 energisings of the solenoid on the spool magnetizing assembly 60, the spool 41 that axle core 62 is magnetized to N magnetic pole and axle core 62 one is magnetized to the N magnetic pole equally.Four groups of (5,6,7,8) solenoid 433 energisings simultaneously, make the four side valve wall master walls 431 that twined by solenoid 433 all be geomagnetic into the N magnetic pole, spool 41 becomes two blocks of identical magnet of polarity with four side valve wall master walls 431, produces electromagnetic repulsion force between them.When repulsion during greater than the active force of hydraulic lock, spool begins to the motion of valve pocket medial axis direction, and gripping orientation is eased.Behind the solenoid 61 and the 433 energising certain hours of the solenoid on the four side valve wall master walls of magnetizing assembly 60, make each solenoid outage certain hour simultaneously, so circulation repeatedly, spool 41 is under the effect of electromagnetic force, radially (A is to B) along valve pocket 42 significantly vibrates, 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 the spool significantly reduces, avoiding spool to be crushed on the 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.Especially, supersonic transducer is pressed from spool magnetizing assembly 60 distances from the near to the remote with supersonic transducer called after 50a, 50b, 50c on the same plane, if detected chucking fault point is respectively when 50a, 50b, 50c position, electrical current on the corresponding solenoid 5,6,7,8 is ia, ib, ic, and ia＜ib＜ic.

Certain above-mentioned electromagnetic force also can be electromagnetic attraction, and it is constant namely to start spool 41 magnetization, and only makes 431 energisings of B side valve wall master wall and make spool 41 and B side valve wall master wall 431 become opposite polarity two blocks of magnet, produces electromagnetic attraction between them.When suction during greater than the active force of hydraulic lock, spool begins towards the motion of B side direction, and gripping orientation is eased.Behind the energising of the solenoid on B side valve wall master wall certain hour, this solenoid outage, and make the same time of solenoid energising on the A side valve wall master wall (as preferably subsequently, electrical current on the A side solenoid little than on the B side solenoid, thereby improve the effect of electromagnetic attraction de-chucking), so circulation repeatedly, spool is under the effect of electromagnetic force, radially significantly vibration along valve pocket, make radially that unbalanced pressure is alleviated or eliminates, thereby reach as above-mentioned technique effect.

As described above, the direction of chucking is radially, and the present invention is by radial electromagnetic force effect de-chucking fault, and its effect is better than the chucking solution by the axial vibration mode; Simultaneously, adopt the technical program, simple in structure, with low cost, easy and simple to handle, using effect is good.

Among above-mentioned two embodiments, each module and CPU module 20 tighten the working procedure of failure prediction, detection and location such as following in the ultrasonic chucking failure prediction detection and location module 23:

With that side surface wiped clean that hydrovalve is installed supersonic transducer, spread acoustic coupling medium (being machine oil in the present embodiment), a plurality of supersonic transducers (being six in the present embodiment) equidistant average line placement along the medial axis of hydrovalve.Be about to the outer side surface that six supersonic transducers are fixedly installed in hydraulic valve body, the medial axis of the shaft axis of supersonic transducer and valve body internal valve cavity intersects vertically, in other words six supersonic transducer equidistant average line placements along the valve pocket medial axis of hydrovalve.

Then, demarcate the operation of benchmark step, by intelligent controller and the supersonic transducer that is subjected to its control, carry out the operation of the amplitude output control of the ultrasound detection control of intelligent controller and intelligent controller, when obtaining monitoring point, a plurality of supersonic transducers place nominal situation and the complete reference signal amplitude when tightening operating mode.In the present embodiment, specifically introduce two kinds:

When using for the first time, hydrovalve is adjusted to nominal situation, be about to spool and adjust to the medial axis coincidence of spool and valve pocket, ultrasound detection control by intelligent controller, and the amplitude of intelligent controller output control, the reference signal amplitude of correspondence when obtaining signal amplitude as monitoring point, No. 1 supersonic transducer place nominal situation repeats aforesaid operations, the complete reference signal amplitude when finally obtaining monitoring point, six supersonic transducer places nominal situation; Hydrovalve is adjusted to the chucking operating mode, ultrasound detection control by intelligent controller, and the amplitude of intelligent controller output control, the reference signal amplitude of correspondence when obtaining signal amplitude as monitoring point, No. 1 supersonic transducer place chucking operating mode, repeat aforesaid operations, the complete reference signal amplitude when finally obtaining monitoring point, a plurality of supersonic transducers place chucking operating mode;

Said method is to demarcate whole supersonic transducers when adjusting to nominal situation one by one, demarcates whole supersonic transducers when adjusting to the chucking operating mode then more one by one.Can certainly take following method, supersonic transducer one by one, each supersonic transducer are demarcated nominal situation earlier, demarcate chucking operating mode again.Specific as follows:

When using for the first time, hydrovalve is adjusted to nominal situation, be about to spool and adjust to the medial axis coincidence of spool and valve pocket, ultrasound detection control by intelligent controller, and the amplitude of intelligent controller output control, the reference signal amplitude of correspondence when obtaining signal amplitude as monitoring point, particular ultrasound transducer place nominal situation; Hydrovalve is adjusted to the chucking operating mode, by the ultrasound detection control of intelligent controller, and the amplitude of intelligent controller output control, the reference signal amplitude of correspondence when obtaining signal amplitude as monitoring point, particular ultrasound transducer place chucking operating mode; Repeat aforesaid operations, when finally obtaining monitoring point, a plurality of supersonic transducers place nominal situation and the complete reference signal amplitude during the chucking operating mode.

In addition, the step of above-mentioned demarcation benchmark, be at the hydrovalve an of the unknown, if the hydrovalve of a certain identical type or a certain same batch is detected, the reference value of using for the first time this similar hydrovalve to obtain by this two step before then can directly copying, but obviously: at first, this method of measurement is not to have omitted this two step, but directly copying on the basis of measurement procedure before; Secondly, be to judge more accurately, our suggestion still each hydrovalve is demarcated goodly one by one, does not have complete living hydrovalve after all.

General operating mode at hydrovalve, when the chucking fault may take place (when occurring needing to judge the chucking fault message of hydrovalve in other words), the ultrasonic chucking failure prediction detection and location module 23 of controlling the CPU module of intelligent controller encourages a plurality of ultrasonic transducers regularly to produce ultrasonic pulse and detection of echoes signal (being the reflected wave electrical pulse) in turn, ultrasonic chucking failure prediction detection and location module 23 tightens differentiation control of failure ratio with this echo signal and reference signal amplitude, finally send the failure prediction signal or send the failure prediction signal and the chucking signal to CPU module 20, CPU module 20 driving wireless communication modules 24 send to central control room with this failure prediction signal and carry out fault pre-alarming.

The chucking failure ratio is differentiated control as described above.Further specify down the details of relatively differentiating in the control below:

When the chucking fault takes place, spool and a certain side valve wall contact, then the gap between this side valve core and valve wall is close to and disappears, at this moment, with echo signal (being the reflected wave electrical pulse) after the amplitude-frequency analysing and processing and during nominal situation and during the chucking operating mode reference signal amplitude of correspondence compare, can draw corresponding signal;

Drop on the reference signal amplitude range of chucking during operating mode when detecting echo signal, except to CPU module 20 sends the failure prediction signal, also determine the chucking position of this plane normal direction by the echo signal numerical value of the above supersonic transducer in three places on the more same plane, detect the occurrence positions that obtains tightening fault.The working principle of above-mentioned location is as follows: when chucking took place, the part of spool and valve wall pressure were tight, almost do not have the space between the two; And leave the space between remaining part and the valve wall.When ultrasonic echo detected, the size in space can be by drawing the echo signal signature analysis like this.Can obtain the chucking information of this tangent plane along the bull ultrasonic probe of spool axial distribution installation.If along the distribution of spool circumferencial direction more ultrasonic probe is installed, 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 specific embodiments of the invention only, 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

1. an Intelligent Measurement and repair the method for hydrovalve chucking fault, hydrovalve comprises the valve body of proportion electro-magnet, spool and band valve pocket, it is characterized in that: comprise adaptation step, installation steps, demarcation benchmark step, detect step and repair step, specific as follows:

Wherein adaptation step refers to, the valve wall of valve body is transformed into special valve wall, 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 four solenoids on the valve wall master wall respectively, spool and valve wall master wall are made by the magnet case alloy, are made by magnet case alloy not every tape; Add the cartridge spool magnetizing assembly between spool and proportion electro-magnet, the spool magnetizing assembly comprises solenoid and the cylindrical shaft core of band magnetic conduction framework, and axle core and spool are made one, and the axle core is made by the magnet case alloy;

Installation steps wherein refer to a plurality of supersonic transducers are 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; Described supersonic transducer and valve body outer side surface directly scribble acoustic coupling medium; Described a plurality of supersonic transducer is the even number more than six, is divided into two rows, is parallel on adjacent two outer side surfaces that are installed in valve body of valve body internal valve cavity medial axis, and each supersonic transducer on each side is uniformly-spaced arranged;

Wherein demarcate the benchmark step, refer to by intelligent controller and the supersonic transducer that is subjected to its control, carry out the operation of the amplitude output control of the ultrasound detection control of intelligent controller and intelligent controller, when obtaining monitoring point, a plurality of supersonic transducers place nominal situation and the complete reference signal amplitude when tightening operating mode;

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, power module of voltage regulation and magnetization control module; Ultrasonic chucking failure prediction detection and location module comprises high-speed a/d modular converter, echo signal filtering 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, wireless communication module with CPU module, electromagnetic force chucking, the magnetization control module links to each other 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, the magnetization control module links to each other and control the work of entire circuit; Wireless communication module links to each other with CPU module; General proportional amplifier module links to each other with CPU module and proportion electro-magnet; Four solenoids that electromagnetic force chucking is got rid of on module and CPU module and the four valve wall master walls link to each other; The magnetization control module links to each other with solenoid on CPU module and the spool magnetizing assembly; Ultrasonic chucking failure prediction detection and location module links to each other with CPU module and a plurality of ultrasonic transducer, being specially CPU module links to each other with the high-speed a/d modular converter and can handle the echo signal of collection, CPU module links to each other with the ultrasound emission module and can control the ultrasonic pulse generation, CPU module and multichannel handover module link to each other to be used between a plurality of supersonic transducers and switch ultrasound emission, receive object, the ultrasound emission module links to each other with the multichannel handover module, the high-speed a/d modular converter links to each other with echo signal filtering amplification module, echo signal filtering amplification module links to each other with the multichannel handover module, and the multichannel handover module links to each other with a plurality of supersonic transducers;

Wherein detect step, refer to the general operating mode at hydrovalve, the CPU module of intelligent controller is controlled ultrasonic chucking failure prediction detection and location module and is encouraged a plurality of ultrasonic transducers regularly to produce ultrasonic pulse and detection of echoes signal in turn, echo signal is the reflected wave electrical pulse, ultrasonic chucking failure prediction detection and location module tightens differentiation control of failure ratio with this echo signal and reference signal amplitude, finally send the failure prediction signal or send the failure prediction signal and the chucking signal to CPU module, CPU module driving wireless communication module sends to central control room with this failure prediction signal and carries out fault pre-alarming;

Described chucking failure ratio is differentiated control, refer to echo signal after the amplitude-frequency analysing and processing and during nominal situation and during the chucking operating mode reference signal amplitude of correspondence compare; During reference signal amplitude range when detecting echo signal and depart from nominal situation, send the failure prediction signal to CPU module; Drop on the reference signal amplitude range of chucking during operating mode when detecting echo signal, except sending to CPU module the failure prediction signal, also determine the chucking position of this plane normal direction by the echo signal numerical value of the above supersonic transducer in three places on the more same plane, detection obtains tightening the occurrence positions of fault, and sends the chucking signal to CPU module;

Wherein repairing step refers to, the CPU module of intelligent controller is according to detecting the chucking signal that step is sent, determine the energising direction, energising number of solenoid on the spool magnetizing assembly and four solenoids on the special valve wall, in proper order, size of current, current"on"time and frequency, and this information delivered to the spool magnetizing assembly and the electromagnetic force chucking is got rid of module;

Spool magnetizing assembly and electromagnetic force chucking eliminating module are moved accordingly corresponding solenoid energising enforcement chucking fault are got rid of.

2. a kind of Intelligent Measurement as claimed in claim 1 and repair the method for hydrovalve chucking fault, it is characterized in that: in the described demarcation benchmark step by intelligent controller and the supersonic transducer that is subjected to its control, carry out the ultrasound detection control of intelligent controller and the amplitude of intelligent controller and export the operation of controlling, refer to comprise demarcate normal benchmark step and demarcate tighten the benchmark step; Wherein demarcate normal benchmark step, refer to hydrovalve is adjusted to nominal situation, be about to spool and adjust to the medial axis coincidence of spool and valve pocket, ultrasound detection control by intelligent controller, and the amplitude of intelligent controller output control, the reference signal amplitude of correspondence when obtaining signal amplitude as monitoring point, particular ultrasound transducer place nominal situation repeats aforesaid operations, the complete reference signal amplitude when finally obtaining monitoring point, a plurality of supersonic transducers place nominal situation; Wherein demarcate chucking benchmark step, refer to hydrovalve is adjusted to the chucking operating mode, ultrasound detection control by intelligent controller, and the amplitude of intelligent controller output control, the reference signal amplitude of correspondence when obtaining signal amplitude as monitoring point, particular ultrasound transducer place chucking operating mode, repeat aforesaid operations, the complete reference signal amplitude when finally obtaining monitoring point, a plurality of supersonic transducers place chucking operating mode.

3. a kind of Intelligent Measurement as claimed in claim 1 and repair the method for hydrovalve chucking fault, it is characterized in that, in the described demarcation benchmark step by intelligent controller and the supersonic transducer that is subjected to its control, carry out the ultrasound detection control of intelligent controller and the amplitude of intelligent controller and export the operation of controlling, refer to comprise as follows: hydrovalve is adjusted to nominal situation, be about to spool and adjust to the medial axis coincidence of spool and valve pocket, ultrasound detection control by intelligent controller, and the amplitude of intelligent controller output control, the reference signal amplitude of correspondence when obtaining signal amplitude as monitoring point, particular ultrasound transducer place nominal situation; Hydrovalve is adjusted to the chucking operating mode, by the ultrasound detection control of intelligent controller, and the amplitude of intelligent controller output control, the reference signal amplitude of correspondence when obtaining signal amplitude as monitoring point, particular ultrasound transducer place chucking operating mode; Repeat aforesaid operations, when finally obtaining monitoring point, a plurality of supersonic transducers place nominal situation and the complete reference signal amplitude during the chucking operating mode.

4. as claim 2 or 3 described a kind of Intelligent Measurement and repair the method for hydrovalve chucking fault, it is characterized in that: described spool magnetizing assembly and electromagnetic force chucking eliminating module are moved accordingly corresponding solenoid energising enforcement chucking fault are got rid of, refer to that the spool magnetizing assembly takes spool magnetization control to make spool be magnetized to N or S magnetic pole accordingly, the electromagnetic force chucking is got rid of module and is taked valve wall magnetization control to make four valve wall master walls all be magnetized to the magnetic pole identical with spool accordingly, produce the electromagnetic repulsion force that differs in size between spool and four valve wall master walls, thereby make spool begin to move to the medial axis direction of valve pocket, alleviate gripping orientation; Perhaps, the electromagnetic force chucking is got rid of module and is taked valve wall magnetization control to make four valve wall master walls all be magnetized to N or S magnetic pole accordingly, the spool magnetizing assembly takes spool magnetization control that spool is magnetized to and the identical magnetic pole of valve wall master wall accordingly, produce the electromagnetic repulsion force that differs in size between spool and four valve wall master walls, thereby make spool begin to move to the medial axis direction of valve pocket, alleviate gripping orientation;

Described spool magnetization control refers to, solenoid on the spool magnetizing assembly (61) is switched on, control the current direction in this solenoid, just be magnetized to N or S magnetic pole equally with being inserted in the spool (41) that axle core in the solenoid is magnetized to N or S magnetic pole and axle core (62) one;

5. a kind of Intelligent Measurement as claimed in claim 4 and repair the method for hydrovalve chucking fault, it is characterized in that: described spool magnetizing assembly and electromagnetic force chucking eliminating module are moved accordingly corresponding solenoid energising enforcement chucking fault are got rid of, also comprise and take discontinuous cycle control, described discontinuous cycle control refers to, solenoid energising on the solenoid of spool magnetizing assembly and four valve wall master walls, make each same time of solenoid outage more simultaneously, continue to implement above-mentioned reparation step then, so circulation repeatedly, make spool (41) under the effect of electromagnetic force, along the radial vibration of valve pocket (42).

6. a kind of Intelligent Measurement as claimed in claim 5 and repair the method for hydrovalve chucking fault, it is characterized in that: described Frequency for Ultrasonic Energy Transducer is more than 10MHz; A/D converter in the described intelligent controller high speed A/D modular converter is selected the A/D chip of ADS5485 or equal performance for use, and described supersonic transducer is selected normal probe for use, and described acoustic coupling medium is machine oil; 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.

7. as claim 2 or 3 described a kind of Intelligent Measurement and repair the method for hydrovalve chucking fault, it is characterized in that: described spool magnetizing assembly and electromagnetic force chucking eliminating module are moved accordingly corresponding solenoid energising enforcement chucking fault are got rid of, refer to that the spool magnetizing assembly takes spool magnetization control to make spool be magnetized to N or S magnetic pole accordingly, the electromagnetic force chucking is got rid of module and is taked valve wall magnetization control accordingly, make the valve wall master wall of chucking side, opposite be magnetized to the magnetic pole opposite with spool, produce electromagnetic attraction between the valve wall master wall of spool and chucking side, opposite, thereby make spool begin to move to the medial axis direction of valve pocket, alleviate gripping orientation; Perhaps electromagnetic force chucking eliminating module takes valve wall magnetization control to make the valve wall master wall of chucking side, opposite be magnetized to N or S magnetic pole accordingly, the spool magnetizing assembly is taked spool magnetization control that spool is magnetized to accordingly and is tightened the opposite magnetic pole of valve wall master wall of side, opposite, produce electromagnetic attraction between the valve wall master wall of spool and chucking side, opposite, thereby make spool begin to move to the medial axis direction of valve pocket, alleviate gripping orientation;

Described spool magnetization control refers to, solenoid on the spool magnetizing assembly is switched on, control the current direction in this solenoid, just be magnetized to N or S magnetic pole equally with being inserted in the spool that axle core in the solenoid is magnetized to N or S magnetic pole and axle core one;

8. a kind of Intelligent Measurement as claimed in claim 7 and repair the method for hydrovalve chucking fault, it is characterized in that: described spool magnetizing assembly and electromagnetic force chucking eliminating module are moved accordingly corresponding solenoid energising enforcement chucking fault are got rid of, also comprise and take double vibrations control, described double vibrations control refers to, solenoid energising on the valve wall master wall of chucking side, opposite, make this solenoid outage again, and the solenoid on the valve wall master wall that tightens the side is switched on the same time, so circulation repeatedly, make spool under the effect of electromagnetic force, along the radial vibration of valve pocket.

9. a kind of Intelligent Measurement as claimed in claim 8 and repair the method for hydrovalve chucking fault, it is characterized in that: the electrical current of the solenoid in the described double vibrations control on the valve wall master wall of chucking side is littler than the electrical current of the solenoid on the valve wall master wall of chucking side, opposite.

10. a kind of Intelligent Measurement as claimed in claim 9 and repair the method for hydrovalve chucking fault, it is characterized in that: described Frequency for Ultrasonic Energy Transducer is more than 10MHz; A/D converter in the described intelligent controller high speed A/D modular converter is selected the A/D chip of ADS5485 or equal performance for use, and described supersonic transducer is selected normal probe for use, and described acoustic coupling medium is machine oil; 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.