CN106402086B - A kind of hydraulic valve debugging system - Google Patents
A kind of hydraulic valve debugging system Download PDFInfo
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- CN106402086B CN106402086B CN201611061657.4A CN201611061657A CN106402086B CN 106402086 B CN106402086 B CN 106402086B CN 201611061657 A CN201611061657 A CN 201611061657A CN 106402086 B CN106402086 B CN 106402086B
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- hydraulic valve
- valve rod
- valve
- pressure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B19/00—Testing; Calibrating; Fault detection or monitoring; Simulation or modelling of fluid-pressure systems or apparatus not otherwise provided for
- F15B19/005—Fault detection or monitoring
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- Fluid Mechanics (AREA)
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- General Engineering & Computer Science (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The present invention proposes a kind of hydraulic valve debugging system, include the pressure sensor and electric potential measuring instrument being connect with the valve rod of hydraulic valve, the pressure sensor and the electric potential measuring instrument are connected with controller, the pressure of the valve rod of the change of magnetic field strength and hydraulic valve of the pressure sensor and electric potential measuring instrument test hydraulic valve electromagnetic coil, flow, at least one of current parameters running parameter, and test result is transferred to controller, the change of magnetic field strength according to hydraulic valve electromagnetic coil, determine that the parameter of valve rod of hydraulic valve is compared by the stroke directions of valve rod with pre-set threshold value；It determines whether valve rod working condition is normal, and when occurring abnormal, determines debugging direction, the present invention can accurately carry out breakdown judge in real time, and enter corresponding debugging mode, solve its failure.
Description
Technical field
The invention belongs to technical field of engineering machinery, more particularly to a kind of hydraulic valve debugging system.
Background technology
Currently, slide-valve gear is using a kind of most structure type in all kinds of hydraulic valves, guiding valve is by valve body, spool and valve
Three critical pieces of chamber are constituted, and by changing position of the spool in valve body valve chamber, the change of fluid flow direction may be implemented in guiding valve
And break-make.Slide valve jam even clamping failure is one of failure and failure mode most commonly seen in hydraulic system, can generally be divided
For hydraulic pressure bite, clamping and mechanical bite clamping two major classes.Popular to say, bite refers to the intermediate shape between nominal situation and clamping
State, clamping are exactly that spool is not active, and bite refers to that spool movement is difficult, smooth when not as good as normal work, is the omen of clamping,
Solving in time can be to avoid the generation of clamping.
Wherein, hydraulic pressure bite, clamping are mainly since machining causes spool error in geometrical form and coaxiality error to produce
Caused by raw radial direction unbalanced pressure, and mechanical bite, clamping are then mainly since the particulate pollutant at operation scene is in guiding valve
Gap is gradually caused by siltation.There is constant pressure difference at the radial clearance both ends that valve rod and valve body are constituted, when hydraulic oil is dirty
When dye particle brings gap into, because the surface of gap runner hole wall also has the ability of capture pollution particle --- depth type filtering effect
It answers and constantly captures pollution particle, and occur to pollute particle entrapment, to generate pollution clamping force.Briefly, that is, clamping is polluted
It is the main Types of mechanical clamping, radial load imbalance is the main reason for causing hydraulic lock.And bite is often by slight dirty
Dye clamping or radial load imbalance cause, and resistance is smaller.
In the prior art, there are mainly two types of the methods for excluding above two failure：First, in processing and live operational process
In take measures, reduce the probability to break down, for example, install in systems fine filter, rationally open up on valve rod balancing slit,
Stringent process and assemble quality etc.；Another method is exactly online real-time fault diagnosis and troubleshooting.Currently, there is no it is sensitiveer,
Accurate online real time fault diagnosis device, though there is similar device complicated, with high costs.
Therefore, there is an urgent need for a kind of hydraulic valve debugging systems now, can accurately carry out breakdown judge in real time, and enter corresponding
Debugging mode solves its failure.
Invention content
The present invention proposes a kind of hydraulic valve debugging system, and can not in time hydraulic valve be adjusted in the prior art by solving
Examination, solves the problems, such as its failure.
The technical proposal of the invention is realized in this way：Hydraulic valve debugging system includes being connect with the valve rod of hydraulic valve
Pressure sensor and electric potential measuring instrument, the pressure sensor and the electric potential measuring instrument are connected with controller, the pressure
The pressure of the valve rod of the change of magnetic field strength and hydraulic valve of force snesor and electric potential measuring instrument test hydraulic valve electromagnetic coil,
At least one of flow, current parameters running parameter, and test result is transferred to controller, it is described according to hydraulic valve electromagnetism
The change of magnetic field strength of coil determines that the parameter of valve rod of hydraulic valve is compared by the stroke directions of valve rod with pre-set threshold value；Really
Whether normal determine valve rod working condition, and when occurring abnormal, determines debugging direction.
As a preferred embodiment, further including having supersonic generator, described in the supersonic generator connection
Controller, the supersonic generator detect hydraulic valve working condition, generate the vibrating signal of specific frequency, amplitude and waveform,
And the valve rod controller for hydraulic valve that the vibrating signal is added to, acquire the vibrating signal wave on electromagnetic coil in hydraulic valve
Shape, and by waveform first control signal and flutter waveform detach, it is defeated that the control signal obtained after separation is fed back into signal
Second control signal is generated after entering the signal subtraction for controlling valve rod of hydraulic valve displacement of end and setting, by what is obtained after separation
The average information of second control signal is exported with vibrating signal and carries out breakdown judge.
As a preferred embodiment, the breakdown judge includes the average value letter according to the control signal detected
The frequency of breath and vibrating signal, peak-to-peak value, wave distortion provide degree of membership by Fuzzy multiple criteria decision-making method and judge；According to
Judging result determines controller output power.
As a preferred embodiment, determine whether valve rod working condition is normal, including the valve rod work that will be measured
Parameter is compared with pre-set threshold value, when surveying running parameter more than the first threshold values or less than the second threshold values, determines valve rod
Whether abnormal and Exception Type is greater than the first threshold values or is less than the second threshold values for work.
As a preferred embodiment, the pressure of acquisition valve rod, oil inlet is acquired including the use of pressure sensor
Pressure signal, and be compared respectively with the first threshold values and the second threshold values.
As a preferred embodiment, at least one of the pressure of the valve rod of hydraulic valve, flow, current parameters work
Make parameter, braking characteristic curve is generated during braking, determines correcting variable.
As a preferred embodiment, in the electromagnetic coil braking process, n times are carried out in several cycles and are prolonged
It is continuous, in each cycle, school is carried out to predetermined braking characteristic curve according to recurrence formula using the parameter of previous cycle
Just.
As a preferred embodiment, further include being directed to the default necessary pressure of the valve rod in the controller, according to
The collected pressure of pressure sensor increases time or pressure demand, generates the variable for correction, determines correction coefficient, will
The correction coefficient and predetermined braking characteristic curve addition/be multiplied, generate correction braking characteristic curve.
As a preferred embodiment, the correction coefficient is expressed as：
Kn=1- (1-Kfil,n-1)*√T1/T2, wherein n is the quantity of K, T1 be current pressure increased total increase time/
Pressure demand, T2 are to increase the time by desired pressure difference and the nominal calculated nominal pressure of gradient, and pressure difference is by previous
Pressure drop determines.
As a preferred embodiment, after disconnected fault type, provides follow-up work using the controller and instruct, packet
It includes into corresponding failure and solves pattern.
After using above-mentioned technical proposal, the beneficial effects of the invention are as follows：Using hydraulic valve debugging system of the present invention right
When hydraulic valve is debugged, entire debugging process automatically completes, and shortens detection and debugs the required time, improves detection
The efficiency of debugging；Operation, detection, the judgement of hydraulic valve reduce the artificial influence because of to test result, ensure that debugging
Correctness；There can be very master-hand's sensitivity in the detection that bite tightens failure, utilize specific vibrating signal, Ke Yibao
The monotonicity of card detection signal；The working method that intermittent cyclic can be utilized, reduces energy consumption.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention without having to pay creative labor, may be used also for those of ordinary skill in the art
With obtain other attached drawings according to these attached drawings.
Fig. 1 is the structural diagram of the present invention；
Fig. 2 is the workflow schematic diagram of the present invention.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other without creative efforts
Embodiment shall fall within the protection scope of the present invention.
As shown in Figs. 1-2, this hydraulic valve debugging system includes the pressure sensor and electricity being connect with the valve rod of hydraulic valve
Position measuring appliance, the pressure sensor and the electric potential measuring instrument are connected with controller, the pressure sensor and current potential
In the change of magnetic field strength of measuring appliance test hydraulic valve electromagnetic coil and the pressure of the valve rod of hydraulic valve, flow, current parameters
At least one running parameter, and test result is transferred to controller, the magnetic field intensity according to hydraulic valve electromagnetic coil
Variation, determines that the parameter of valve rod of hydraulic valve is compared by the stroke directions of valve rod with pre-set threshold value；Determine valve rod working condition
It is whether normal, and when occurring abnormal, determine debugging direction.
Further include having supersonic generator, the supersonic generator connects the controller, the supersonic generator
Hydraulic valve working condition is detected, generates the vibrating signal of specific frequency, amplitude and waveform, and the vibrating signal is added to liquid
The valve rod controller of pressure valve acquires the vibrating signal waveform on electromagnetic coil in hydraulic valve, and the first control in waveform is believed
Number detached with flutter waveform, by the control signal obtained after separation feed back to signal input part and setting for controlling hydraulic valve
Second control signal is generated after the signal subtraction of displacement of valve rod, by the average information of the second control signal obtained after separation to quiver
The signal that shakes output carries out breakdown judge.
The breakdown judge includes frequency, the Feng Feng according to the average value information and vibrating signal of the control signal detected
Value, wave distortion provide degree of membership by Fuzzy multiple criteria decision-making method and judge；According to judging result, determine that controller exports
Power.
It determines whether valve rod working condition is normal, including the valve rod running parameter of measurement is compared with pre-set threshold value,
It is more than the first threshold values or when less than the second threshold values when surveying running parameter, determines whether valve rod work abnormal and exception class
Type is greater than the first threshold values or is less than the second threshold values.
Acquire valve rod pressure, including the use of pressure sensor acquire oil inlet pressure signal, and respectively with the first valve
Value and the second threshold values are compared.
At least one of the pressure of the valve rod of hydraulic valve, flow, current parameters running parameter, generates system during braking
Broken line analysis determines correcting variable.
In the electromagnetic coil braking process, n times continuity is carried out in several cycles, in each cycle, using current
The parameter of cycle is corrected predetermined braking characteristic curve according to recurrence formula.
Further include being directed to the default necessary pressure of the valve rod in the controller, is increased according to the collected pressure of pressure sensor
Between added-time or pressure demand, variable of the generation for correction determine correction coefficient, by the correction coefficient and predetermined system
Broken line analysis addition/multiplication generates correction braking characteristic curve.
The correction coefficient is expressed as：
Kn=1- (1-Kfil,n-1)*√T1/T2, wherein n is the quantity of K, T1 be current pressure increased total increase time/
Pressure demand, T2 are to increase the time by desired pressure difference and the nominal calculated nominal pressure of gradient, and pressure difference is by previous
Pressure drop determines.
After disconnected fault type, provides follow-up work using the controller and instruct, including enter corresponding failure and solve pattern.
The operation principle of the hydraulic valve debugging system is：It is adjusted to hydraulic valve using hydraulic valve debugging system of the present invention
When examination, entire debugging process automatically completes, and shortens detection and debugs the required time, improves the efficiency of detection debugging；
Operation, detection, the judgement of hydraulic valve reduce the artificial influence because of to test result, ensure that the correctness of debugging；It can
There is very master-hand's sensitivity in the detection that bite tightens failure, utilize specific vibrating signal, it is ensured that detection signal
Monotonicity；The working method that intermittent cyclic can be utilized, reduces energy consumption.
In certain embodiments, controller is also associated with memory, can store the fault data of hydraulic valve, and
Data after storage are processed, accident analysis figure is generated.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
With within principle, any modification, equivalent replacement, improvement and so on should all be included in the protection scope of the present invention god.
Claims (4)
1. a kind of hydraulic valve debugging system, which is characterized in that include the pressure sensor and electricity being connect with the valve rod of hydraulic valve
Position measuring appliance, the pressure sensor and the electric potential measuring instrument are connected with controller, the pressure sensor and current potential
In the change of magnetic field strength of measuring appliance test hydraulic valve electromagnetic coil and the pressure of the valve rod of hydraulic valve, flow, current parameters
At least one running parameter, and test result is transferred to controller, according to the magnetic field intensity of the hydraulic valve electromagnetic coil
Variation, determines that the parameter of valve rod of hydraulic valve is compared by the stroke directions of valve rod with pre-set threshold value；Determine valve rod working condition
It is whether normal, and when occurring abnormal, determine debugging direction；Further include having supersonic generator, the supersonic generator
The controller is connected, the supersonic generator detects hydraulic valve working condition, generates quivering for specific frequency, amplitude and waveform
Shake signal, and the valve rod controller for hydraulic valve that the vibrating signal is added to, and acquires the flutter on electromagnetic coil in hydraulic valve
Signal waveform, and by waveform first control signal and flutter waveform detach, the control signal obtained after separation is fed back to
Second control signal is generated after signal input part and the signal subtraction for controlling valve rod of hydraulic valve displacement of setting, after separation
The average information of obtained second control signal is exported with vibrating signal and carries out breakdown judge；The breakdown judge includes according to inspection
The average value information of the control signal measured and the frequency of vibrating signal, peak-to-peak value, wave distortion, pass through Fuzzy Multi-criteria Decision-making
Method provides degree of membership judgement；According to judging result, controller output power is determined；Determine whether valve rod working condition is normal,
Including the valve rod running parameter of measurement to be compared with pre-set threshold value, when actual measurement running parameter is more than the first threshold values or is less than
When the second threshold values, it is abnormal to determine that valve rod work exists；The pressure for acquiring valve rod acquires oil inlet including the use of pressure sensor
Pressure signal, and be compared respectively with the first threshold values and the second threshold values；The pressure of the valve rod of hydraulic valve, flow, current parameters
At least one of running parameter, during braking generate braking characteristic curve, determine correcting variable.
2. hydraulic valve debugging system according to claim 1, which is characterized in that in the electromagnetic coil braking process,
N times continuity is carried out in multiple cycles, in each cycle, using the parameter of previous cycle according to recurrence formula to predetermined
Braking characteristic curve is corrected.
3. hydraulic valve debugging system according to claim 2, which is characterized in that further include being directed to the valve in the controller
The default necessary pressure of bar, increases time or pressure demand according to the collected pressure of pressure sensor, generates for correction
Variable determines correction coefficient, by the correction coefficient and predetermined braking characteristic curve addition/be multiplied, generates correction braking
Characteristic curve.
4. hydraulic valve debugging system according to claim 3, which is characterized in that after failure judgement type, utilize the control
Device processed provides follow-up work instruction, and pattern is solved into corresponding failure.
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| CN201611061657.4A CN106402086B (en) | 2016-11-25 | 2016-11-25 | A kind of hydraulic valve debugging system |
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| CN201611061657.4A CN106402086B (en) | 2016-11-25 | 2016-11-25 | A kind of hydraulic valve debugging system |
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| CN106402086B true CN106402086B (en) | 2018-09-25 |
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| CN110671390B (en) * | 2018-07-03 | 2020-11-20 | 河南平芝高压开关有限公司 | Method and device for detecting action characteristics of reversing valve unit |
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