CN106402086A - Debugging system for hydraulic valve - Google Patents
Debugging system for hydraulic valve Download PDFInfo
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- CN106402086A CN106402086A CN201611061657.4A CN201611061657A CN106402086A CN 106402086 A CN106402086 A CN 106402086A CN 201611061657 A CN201611061657 A CN 201611061657A CN 106402086 A CN106402086 A CN 106402086A
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- hydraulic valve
- pressure
- valve
- valve rod
- debugging system
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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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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The invention provides a debugging system for a hydraulic valve. The debugging system comprises a pressure sensor and a potential measurer which are connected with a valve rod of the hydraulic valve. A controller is connected to the pressure sensor and the potential measurer. The pressure sensor and the potential measurer tests the magnetic field intensity change of a hydraulic valve electromagnetic coil and at least one of the working parameters including the pressure, the flow and the current parameter of the valve rod of the hydraulic valve and transmits the test results to the controller; the stroke direction of the valve rod is determined according to the magnetic field intensity change of the hydraulic valve electromagnetic coil; the parameter of the valve rod of the hydraulic valve is compared with the preset threshold value; whether the working state of the valve rod is normal or not is determined; and the debugging direction is determined when an anomaly occurs. The debugging system for the hydraulic valve can accurately conduct failure judgment in real time and enters a corresponding debugging mode, so that the failure of the debugging system is solved.
Description
Technical field
The invention belongs to technical field of engineering machinery, particularly to a kind of hydraulic valve debugging system.
Background technology
At present, slide-valve gear is to adopt a kind of most versions in all kinds of hydraulic valves, and guiding valve is by valve body, valve element and valve
Three, chamber critical piece is constituted, and by changing position in valve body valve pocket for the valve element, guiding valve can realize the change of fluid flow direction
And break-make.Slide valve jam or even clamping fault are one of most commonly seen fault in hydraulic system and failure mode, typically can divide
For hydraulic pressure bite, clamping and mechanical bite clamping two big class.Popular say, bite refers to the middle shape between nominal situation and clamping
State, clamping is exactly that valve element is not active, and bite refers to that valve element is mobile difficult, not as smooth during normal work, is the omen of clamping,
Solve in time to avoid the generation of clamping.
Wherein, hydraulic pressure bite, clamping cause valve element error in geometrical form and coaxiality error to produce mainly due to machining
Raw radial direction unbalanced pressure causes, and mechanical bite, clamping are then mainly due to running the particulate pollutant at scene in guiding valve
Gradually deposit and cause in gap.There is constant pressure reduction at the radial clearance two ends constituting in valve rod and valve body, when hydraulic oil is dirty
When dye granule brings gap into, because the ability depth type that the surface of gap runner hole wall also has capture pollution granule filters effect
Answer and constantly capture pollution granule, and occur to pollute particle entrapment, thus producing pollution clamping force.Briefly, that is, pollute clamping
It is the main Types of mechanical clamping, radial direction force unbalance is the main cause causing hydraulic lock.And bite is often by slight dirt
Dye clamping or radial direction force unbalance cause, and resistance is less.
In prior art, the method for exclusion above two fault mainly has two kinds：One is in processing and live running
In take measures, reduce the probability that breaks down, such as install in systems fine filter, rationally open up on valve rod balancing slit,
Strict process and assemble quality etc.；Another kind of method is exactly online real-time fault diagnosis and failture evacuation.At present, there is no sensitiveer,
Accurately online real time fault diagnosis device, though or have similar device complex structure, with high costs.
Therefore, need now a kind of hydraulic valve debugging system badly, accurately can carry out breakdown judge in real time, and enter corresponding
Debugging mode, solves its fault.
Content of the invention
The present invention proposes a kind of hydraulic valve debugging system, solves in prior art and cannot in time hydraulic valve be adjusted
Examination, solves the problems, such as its fault.
The technical scheme is that and be achieved in that：Hydraulic valve debugging system, including be connected with the valve rod of hydraulic valve
Pressure transducer and electric potential measuring instrument, described pressure transducer and described electric potential measuring instrument are connected with controller, described pressure
The pressure of valve rod of the change of magnetic field strength of force transducer and electric potential measuring instrument test hydraulic valve solenoid and hydraulic valve,
At least one of flow, current parameters running parameter, and test result is transferred to controller, described according to hydraulic valve electromagnetism
The change of magnetic field strength of coil, determines that the parameter of valve rod of hydraulic valve and pre-set threshold value are compared by the stroke directions of valve rod；Really
Whether normal determine valve rod working condition, and when abnormal occur, determine debugging direction.
As one kind preferred embodiment, also include supersonic generator, described supersonic generator connects described
Controller, described supersonic generator detects hydraulic valve working condition, generates the vibrating signal of characteristic frequency, amplitude and waveform,
And the valve rod controller of hydraulic valve that described vibrating signal is added to, the vibrating signal ripple on solenoid in collection hydraulic valve
Shape, and the first control signal in waveform is separated with tremor waveform, the control signal obtaining after separation is fed back to signal defeated
The second control signal is generated, by obtain after separation after entering end and the signal subtraction for controlling valve rod of hydraulic valve displacement of setting
The average information of the second control signal carries out breakdown judge with vibrating signal output.
As one kind preferred embodiment, described breakdown judge includes the meansigma methodss letter according to the control signal detecting
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
Judged result, determines controller output.
As one kind preferred embodiment, determine whether valve rod working condition is normal, works including by the valve rod of measurement
Parameter is compared with pre-set threshold value, when actual measurement running parameter is more than the first threshold values or is less than the second threshold values, determines valve rod
Whether work is abnormal, and Exception Type is greater than the first threshold values or is less than the second threshold values.
As one kind preferred embodiment, gather the pressure of valve rod, gather oil-in including using pressure transducer
Pressure signal, and be compared with the first threshold values and the second threshold values respectively.
As one kind preferred embodiment, at least one of the pressure of the valve rod of hydraulic valve, flow, current parameters work
Make parameter, generate braking characteristic curve during braking, determine correcting variable.
As one kind preferred embodiment, in described solenoid braking procedure, carry out n times in several cycles and prolong
Continuous, in each cycle, the parameter using previous cycle carries out school according to recurrence formula to predetermined braking characteristic curve
Just.
As one kind preferred embodiment, it is additionally included in controller and be directed to described valve rod default necessity pressure, according to
The pressure that pressure transducer collects increases time or pressure demand, produces the variable for correction, determines correction coefficient, will
This correction coefficient be added/is multiplied with predetermined braking characteristic curve, produces correction braking characteristic curve.
As one kind preferred embodiment, described correction coefficient is expressed as：
Kn=1- (1-Kfil,n-1)*√T1/T2, wherein, n is the quantity of K, T1 be current pressure increase total increase time/
Pressure demand, T2 is to increase the time by the nominal pressure that desired pressure differential and nominal gradiometer calculate, and pressure differential is by previous
Pressure drop determines.
As one kind preferred embodiment, after disconnected fault type, follow-up work instruction, bag are provided using described controller
Include entrance corresponding failure and solve pattern.
After employing technique scheme, the invention has the beneficial effects as follows：Using hydraulic valve debugging system of the present invention right
When hydraulic valve is debugged, whole debugging process automatically completes, and shortens the time required for detection debugging, improves detection
The efficiency of debugging；The operation of hydraulic valve, detection, judge to decrease artificial because the impact to test result is it is ensured that debugging
Correctness；Can tighten in bite and very master-hand's susceptiveness is had on the detection of fault, using specific vibrating signal, Ke Yibao
The monotonicity of card detection signal；The working method of intermittent cyclic, reducing energy consumption can be utilized.
Brief description
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
Have technology description in required use accompanying drawing be briefly described it should be apparent that, drawings in the following description be only this
Some embodiments of invention, for those of ordinary skill in the art, without having to pay creative labor, also may be used
So that other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is the structural representation of the present invention；
Fig. 2 is the workflow schematic diagram of the present invention.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation description is it is clear that described embodiment is only a part of embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of not making creative work
Embodiment, broadly falls into the scope of protection of the invention.
As shown in Figure 1-2, this hydraulic valve debugging system, including the pressure transducer being connected with the valve rod of hydraulic valve and electricity
Position measuring device, described pressure transducer and described electric potential measuring instrument are connected with controller, described pressure transducer and current potential
Measuring device is tested in the change of magnetic field strength of hydraulic valve solenoid and the pressure of valve rod of hydraulic valve, flow, current parameters
At least one running parameter, and test result is transferred to controller, the described magnetic field intensity according to hydraulic valve solenoid
Change, determines that the parameter of valve rod of hydraulic valve and pre-set threshold value are compared by the stroke directions of valve rod；Determine valve rod working condition
Whether normal, and when abnormal occur, determine debugging direction.
Also include supersonic generator, described supersonic generator connects described controller, described supersonic generator
Detection hydraulic valve working condition, generates the vibrating signal of characteristic frequency, amplitude and waveform, and described vibrating signal is added to liquid
The valve rod controller of pressure valve, the vibrating signal waveform on solenoid in collection hydraulic valve, and the first control in waveform is believed
Number separate with tremor waveform, the control signal obtaining is fed back to signal input part and being used for of setting controls hydraulic valve after separation
The second control signal is generated, by the average information of the second control signal obtaining after separation to quiver after the signal subtraction of displacement of valve rod
Signal output of shaking carries out breakdown judge.
Described breakdown judge includes frequency according to the average value information of control signal that detects and vibrating signal, peak-to-peak
Value, wave distortion, provide degree of membership by Fuzzy multiple criteria decision-making method and judge；According to judged result, determine that controller exports
Power.
Determine whether valve rod working condition is normal, is compared with pre-set threshold value including by the valve rod running parameter of measurement,
When actual measurement running parameter is more than the first threshold values or is less than the second threshold values, determine whether valve rod work is abnormal, and exception class
Type is greater than the first threshold values or is less than the second threshold values.
Collection valve rod pressure, including using pressure transducer gather oil-in 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, determine correcting variable.
In described solenoid braking procedure, carry out n times continuity in several cycles, in each cycle, using current
The parameter of circulation is corrected to predetermined braking characteristic curve according to recurrence formula.
It is additionally included in controller and is directed to described valve rod default necessity pressure, increased according to the pressure that pressure transducer collects
Between the added-time or pressure demand, produce the variable for correction, determine correction coefficient, by this correction coefficient and predetermined system
Broken line analysis are added/are multiplied, and produce correction braking characteristic curve.
Described correction coefficient is expressed as：
Kn=1- (1-Kfil,n-1)*√T1/T2, wherein, n is the quantity of K, T1 be current pressure increase total increase time/
Pressure demand, T2 is to increase the time by the nominal pressure that desired pressure differential and nominal gradiometer calculate, and pressure differential is by previous
Pressure drop determines.
After disconnected fault type, provide follow-up work instruction using described controller, solve pattern including entering corresponding failure.
The operation principle of this hydraulic valve debugging system is：Using hydraulic valve debugging system of the present invention, hydraulic valve is being adjusted
During examination, whole debugging process automatically completes, and shortens the time required for detection debugging, improves the efficiency of detection debugging；
The operation of hydraulic valve, detection, judge to decrease artificial because the impact to test result is it is ensured that the correctness of debugging；Can
Tighten in bite and very master-hand's susceptiveness is had on the detection of fault, using specific vibrating signal it is ensured that detection signal
Monotonicity；The working method of intermittent cyclic, reducing energy consumption can be utilized.
In certain embodiments, controller is also associated with memorizer, can be stored the fault data of hydraulic valve, and
Data after storage is processed, generates accident analysis figure.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all essences in the present invention
Within god and principle, any modification, equivalent substitution and improvement made etc., should be included within the scope of the present invention.
Claims (10)
1. a kind of hydraulic valve debugging system is it is characterised in that include pressure transducer and the electricity being connected with the valve rod of hydraulic valve
Position measuring device, described pressure transducer and described electric potential measuring instrument are connected with controller, described pressure transducer and current potential
Measuring device is tested in the change of magnetic field strength of hydraulic valve solenoid and the pressure of valve rod of hydraulic valve, flow, current parameters
At least one running parameter, and test result is transferred to controller, the described magnetic field intensity according to hydraulic valve solenoid
Change, determines that the parameter of valve rod of hydraulic valve and pre-set threshold value are compared by the stroke directions of valve rod；Determine valve rod working condition
Whether normal, and when abnormal occur, determine debugging direction.
2. hydraulic valve debugging system according to claim 1 is it is characterised in that also including supersonic generator, described
Supersonic generator connects described controller, and described supersonic generator detects hydraulic valve working condition, generates characteristic frequency, width
Value and the vibrating signal of waveform, and the valve rod controller of hydraulic valve that described vibrating signal is added to, electromagnetism in collection hydraulic valve
Vibrating signal waveform on coil, and the first control signal in waveform is separated with tremor waveform, the control that will obtain after separation
Signal processed generates the second control after feeding back to signal input part and the signal subtraction for controlling valve rod of hydraulic valve displacement of setting
Signal, the average information of the second control signal obtaining after separation is carried out breakdown judge with vibrating signal output.
3. hydraulic valve debugging system according to claim 2 is it is characterised in that described breakdown judge includes according to detecting
The average value information of control signal and the frequency of vibrating signal, peak-to-peak value, wave distortion, by Fuzzy multiple criteria decision-making method
Provide degree of membership to judge；According to judged result, determine controller output.
4. hydraulic valve debugging system according to claim 3 is it is characterised in that determine that valve rod working condition is whether normal,
It is compared with pre-set threshold value including by the valve rod running parameter of measurement, when actual measurement running parameter is more than the first threshold values or is less than
During the second threshold values, determine whether valve rod work is abnormal, and Exception Type is greater than the first threshold values or is less than the second threshold values.
5. hydraulic valve debugging system according to claim 4, it is characterised in that the pressure of collection valve rod, is pressed including utilizing
Force transducer gathers the pressure signal of oil-in, and is compared with the first threshold values and the second threshold values respectively.
6. hydraulic valve debugging system according to claim 5 is it is characterised in that the pressure of the valve rod of hydraulic valve, flow, electricity
At least one of stream parameter running parameter, generates braking characteristic curve during braking, determines correcting variable.
7. hydraulic valve debugging system according to claim 6 is it is characterised in that in described solenoid braking procedure,
Multiple circulation in carry out n times continuity, in each cycle, using previous cycle parameter according to recurrence formula to predetermined
Braking characteristic curve is corrected.
8. hydraulic valve debugging system according to claim 7 is directed to described valve it is characterised in that being additionally included in controller
Necessity pressure preset by bar, increases time or pressure demand according to the pressure that pressure transducer collects, produces for correction
Variable, determines correction coefficient, and this correction coefficient be added/is multiplied with predetermined braking characteristic curve, produces correction braking
Characteristic curve.
9. hydraulic valve debugging system according to claim 8 is it is characterised in that described correction coefficient is expressed as：
Kn=1- (1-KFil, n-1)*√T1/T2, wherein, n is the quantity of K, and T1 is total increase time/pressure that current pressure increases
Demand, T2 is to increase the time by the nominal pressure that desired pressure differential and nominal gradiometer calculate, and pressure differential is by previous pressure drop
Determine.
10. hydraulic valve debugging system according to claim 9 is it is characterised in that after disconnected fault type, using described control
Device provides follow-up work instruction, solves pattern including entering corresponding failure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611061657.4A CN106402086B (en) | 2016-11-25 | 2016-11-25 | A kind of hydraulic valve debugging system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611061657.4A CN106402086B (en) | 2016-11-25 | 2016-11-25 | A kind of hydraulic valve debugging system |
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| CN106402086A true CN106402086A (en) | 2017-02-15 |
| CN106402086B CN106402086B (en) | 2018-09-25 |
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| CN201611061657.4A Active CN106402086B (en) | 2016-11-25 | 2016-11-25 | A kind of hydraulic valve debugging system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110671390A (en) * | 2018-07-03 | 2020-01-10 | 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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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110671390A (en) * | 2018-07-03 | 2020-01-10 | 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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| CN106402086B (en) | 2018-09-25 |
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