CN107321586B - A kind of liquid electric pulse shock wave generation device - Google Patents
A kind of liquid electric pulse shock wave generation device Download PDFInfo
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- CN107321586B CN107321586B CN201710512502.6A CN201710512502A CN107321586B CN 107321586 B CN107321586 B CN 107321586B CN 201710512502 A CN201710512502 A CN 201710512502A CN 107321586 B CN107321586 B CN 107321586B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
- B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
- B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
- B06B1/02—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy
- B06B1/0207—Driving circuits
- B06B1/0215—Driving circuits for generating pulses, e.g. bursts of oscillations, envelopes
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Abstract
The invention discloses a kind of liquid electric pulse shock wave generation device, including：Charge and discharge device and feedback regulation device；Charge and discharge device includes：High-voltage DC power supply, storage capacitor, high-voltage switch gear, high-field electrode and low-field electrode；Feedback regulation device includes：Drive module, transmission module, position inspection module and monitoring module；High-voltage DC power supply charges to storage capacitor, and storage capacitor discharges to high-field electrode and low-field electrode by high-voltage switch gear, forms pulse shock wave.Driving device, transmission device can control the movement of electrode, and displacement detector can detect the position of electrode；Monitoring device can be according to the measured value of the parameters such as discharge voltage, discharge current and output power compared with setting value, so as to correct the clearance distance of shock wave generating system and discharge voltage etc., so that discharge system is approximately at critical damping discharge condition, shock strength is improved.The configuration of the present invention is simple, it is pollution-free by pure physical means；Job stability is high with reliability；Energy conversion efficiency is high.
Description
Technical field
The invention belongs to high-voltage technology, technical field of pulse power, are produced more particularly, to a kind of liquid electric pulse shock wave
Generating apparatus.
Background technology
High temperature and pressure plasma, plasma rapid expanding will be formed by applying high voltage pulse to two electrodes in liquid
Pulsed pressure wave, i.e. pulse shock wave can be formed.Shock Wave Characteristics mainly with the phases such as loop parameter, discharge voltage and pole clearance
It closes.The producing method of general pulse shock wave is using the multiple half-wave oscillating discharge of electric current, during the electric discharge of this discharge mode at present
Between it is long, when in circuit, total energy storage is identical, the energy of the consumption such as light radiation, heat radiation is more, is converted to the energy of shock wave mechanical energy
Less, correspondingly, shock strength is relatively low.
In existing pulse shock wave technology, it is contemplated that breakdown voltage has dispersibility when being discharged using liquid, meanwhile, it discharges wink
Between the high-temperature electric arc ablation eletrode tip that is formed increase electrode gap distance, increase average voltage breakdown, therefore routine techniques
The reason of underdamping is used to discharge (current oscillation electric discharge) be ensure can with loop parameter, clearance distance it is consistent when, even if
Stand-off distance increases from slightly, still can carry out to many successes liquid pulse electro discharge, forms shock wave, without adjust every time charging voltage or
Clearance distance is proofreaded, greatly reduces manually-operated complexity.The defects of this technology be it cannot be guaranteed that pulsed discharge can
By property and consistency.And during pulse shock wave is mainly formed in first half-wave of main discharge current electric discharge, routine techniques can not
It automatically fed back according to discharge condition, adjust charging voltage or pole clearance, be unfavorable for accurately regulating and controlling shock strength.
Invention content
In view of the drawbacks of the prior art, the purpose of the present invention is to provide a kind of liquid electric pulse shock wave generation devices, it is intended to
Solve the problems, such as that shock strength is low in the prior art and stability and reliability is low.
The present invention provides a kind of liquid electric pulse shock wave generation device, including：Charge and discharge device and feedback regulation device；Institute
Charge and discharge device is stated to include：High-voltage DC power supply, storage capacitor, high-voltage switch gear, high-field electrode and low-field electrode；The energy storage electricity
One end of appearance is connected to one end of the high-voltage switch gear, and the other end of the high-voltage switch gear is connected to the first of the high-field electrode
Control terminal；The other end of the storage capacitor is connected to one end of the low-field electrode；The feedback regulation device includes：Driving
Module, transmission module, position inspection module and monitoring module；The output terminal of the drive module and the input terminal of the transmission module connect
It connects, the input terminal of the drive module is connect with the output terminal of the monitoring module；Second input terminal of the high-field electrode with
The output terminal connection of the transmission module, the input terminal of institute's rheme inspection module are connect with the first output terminal of the high-field electrode,
The first input end of the monitoring module is connected to the output terminal of institute's rheme inspection module, and the second input terminal is connected to the high-voltage electricity
The second output terminal of pole；By applying high voltage pulse to high-field electrode and low-field electrode, form high temperature and pressure plasma, wait from
Sub rapid expansion compression liquid water forms pulse shock wave；High-field electrode and low-field electrode are accurately controlled by feedback regulation device
Relative position and the high voltage pulse applied, increase interpolar plasma impedance, ensure to be near critical always during electric discharge every time
The underdamping state of damping state rather than routine, improves energy conversion efficiency, pulse shock wave intensity is made to reach most as much as possible
It is excellent.
Further, the high-field electrode is placed with low-field electrode space coaxial-symmetrical, the high-field electrode and
The low-field electrode is placed directly in liquid medium, and the high-field electrode forms pole clearance with the low-field electrode.
Further, drive module includes：Sequentially connected control button, driving motor and rotating guide；When described
When control button is adjusted to rotating forward state, the driving motor drives the rotating guide to rotate forward；When the control button is adjusted to instead
When turning state, the driving motor drives the rotating guide reversion, and the rotation of the rotating guide passes through the transmission module
Be converted to movement.
Further, the transmission module includes：The first chuck, gear and the second chuck set gradually；Described
Input terminal of the input terminal of one chuck as the transmission module, the gear are used for rotating guide in the drive module
Be converted to moving horizontally for the second chuck；Output terminal of the output terminal of second chuck as the transmission module, institute
Second chuck and the height can be driven by the gearing of the gear by stating the forward and backward of rotating guide in drive module
Piezoelectricity pole moves horizontally together, so as to regulate and control the relative position of the high-field electrode.
Further, institute's rheme inspection module includes：Converting unit, receiving unit, sensing unit and measuring unit；It is described
Measuring unit is used to measure the relative position of the high-field electrode by optical signal or magnetic field signal, and measuring signal is passed through institute
It states sensing unit and is sent to the receiving unit, the converting unit is used to convert analog signals into digital signal, realization pair
The measurement of the high-field electrode relative position.
Further, the monitoring module includes：Setup unit, display unit, output unit and control unit；It is described
For setup unit for setting one group of setting value or reference curve, the setting value is discharge voltage value and pole clearance value, described
Reference curve is discharge voltage or current curve；The display unit is used to obtain institute's rheme inspection mould measuring unit in the block
The signal taken is converted into curve and shows；The output unit is used to calculate to analyze according to the data of the display unit to deposit to
The power of arc channel and the speed of energy and size；Described control unit is used for the experiment according to display unit, output unit
Value or trial curve compared with the setting value of setup unit or reference curve, when measured value or trial curve respectively with setting value or
When reference curve has deviation, control button or high-voltage DC power supply in drive module are controlled so that pulse discharging voltage or pole
Between clearance distance change, the state of discharge system is made to optimize shock strength as close as Critical damping state；Work as measured value
Or trial curve, respectively and when setting value or reference curve do not have deviation, control unit will send out brake signal, carry out liquid electricity arteries and veins
Impulse electricity shock wave generates experiment.
In embodiments of the present invention, in order to improve the intensity of shock wave, and reduce the dispersibility of pulsed discharge shock wave, this
Invention setting feedback regulation device, when the monitoring module in feedback regulation device detects setting value or reference curve and measured value
Or experiment curv deviation when, control drive module and transmission module linkage, control high-field electrode to direction initialization move, adjustment
Clearance distance.When the non-setting value in position inspection module detection pole clearance, monitoring module will be informed, monitoring module will send out braking
Signal can carry out pulsed discharge therewith.According to the measuring unit measured value or experiment curv of monitoring module, above-mentioned adjusted is repeated
Journey.So far, can be formed to the adjusting of the closed loop feedback of pole clearance, successive optimization discharge condition, make discharge system be in always compared with
The Critical damping state of optimization realizes the high efficient and reliable regulation and control to shock strength.
Description of the drawings
Fig. 1 is the schematic diagram of pulse shock wave formation basic theory provided in an embodiment of the present invention.
Fig. 2 is the functional block diagram of shock wave regulation device provided in an embodiment of the present invention.
Fig. 3 is the structure diagram of shock wave regulation device provided in an embodiment of the present invention.
Fig. 4 is different half wave number current curves provided in an embodiment of the present invention, wherein (a) is the electricity of 7 half wave numbers of oscillation
Flow waveform；(b) current waveform for 3 half wave numbers of oscillation；(c) it is the current waveform of near critical damped electric discharge.
Fig. 5 is Shock Wave Characteristics corresponding with Fig. 4 provided in an embodiment of the present invention, wherein (a) swashs to be corresponding with Fig. 4 (a)
Wave waveform；(b) it is shock wave waveform corresponding with Fig. 4 (b)；(c) it is shock wave waveform corresponding with Fig. 4 (c).
Specific embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to the accompanying drawings and embodiments, it is right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
As shown in Figure 1, Figure 2 and Figure 3, liquid electric pulse shock wave generation device provided by the invention includes：Charge and discharge device and
Feedback regulation device；Wherein charge and discharge device includes：High-voltage DC power supply 1, storage capacitor 2, high-voltage switch gear 3,4 and of high-field electrode
Low-field electrode 5；Feedback regulation device includes：Drive module 6, transmission module 7, position inspection module 8 and monitoring module 9；Storage capacitor 2
A termination high-voltage switch gear 3 one end, another termination high-field electrode 4 of high-voltage switch gear 3 is connected；Another termination of storage capacitor 2
Low-field electrode 5.High-field electrode 4 is placed with 5 space coaxial-symmetrical of low-field electrode, and high-field electrode 4 and low-field electrode 5 are directly placed
In in liquid medium, high-field electrode 4 forms pole clearance with low-field electrode 5；6 rotating guide end of drive module and transmission module 7
The connection of the first chuck, the other end is connected with the control unit of monitoring module 9；First chuck-end of transmission module 7 and driving
The rotating guide of module 6 is fixedly connected, and the other end is fixedly connected with high-field electrode 4；The measuring unit end of position inspection module 8 and height
Piezoelectricity pole 4 connects, and the other end is connect with the control unit of monitoring module 9.
The power resources of the electrode movement in order to control of drive module 6, including control button, driving motor and rotating guide, control
The control signal of button reception control unit processed, the other end are electrically connected with driving motor, and driving electrodes are fixed with rotating guide to be connected
It connects.The operation principle of drive module 6 is：If control button is adjusted to rotating forward state, driving motor drives rotating guide to rotate forward, if control
Button processed is adjusted to inverted status, and driving motor drives rotating guide reversion, and the rotation of rotating guide passes through the tooth of transmission module 7
Rotation is converted to movement by wheel.
Transmission module 7 is made of the first chuck, gear and the second chuck, and the first chuck is fixedly connected with rotating guide, tooth
Rotating guide is converted to moving horizontally for the second chuck by wheel.Second chuck is fixedly connected with high-field electrode 4, is then revolved
The rotating of transduction bar can drive the second chuck and high-field electrode 4 move horizontally together by the gearing of gear, so as to adjust
Control the relative position of high-field electrode 4.
Position inspection module 8 is made of measuring unit, sensing unit, receiving unit, converting unit.Measuring unit passes through optical signal
Or magnetic field signal measures the relative position of high-field electrode 4, and measuring signal is sent to receiving unit by sensing unit, converts
Unit converts analog signals into digital signal, realizes the measurement to 4 relative position of high-field electrode, and measurement accuracy can reach
0.1mm。
Monitoring module 9 is the nucleus module of the embodiment of the present invention, including setup unit, display unit, output unit and control
One end electric signal connection of unit processed, setup unit and display unit, the other end of display unit connect with output unit, transmit
Electric signal, the other end and the control unit electric signal good connection of output unit, while control unit are by setup unit with showing
Unit, output unit signal compare, send out instruction regulation and control drive module 6；
Setup unit is act as：According to previous theoretical calculation or result of the test, one group of setting value of initial setting or reference
Curve, setting value can be discharge voltage value and pole clearance value, and reference curve is discharge voltage or current curve.
The signal for acting as examining position the measuring unit acquisition in module 8 of display unit is converted into curve and intuitively gives
It has been shown that, including discharge voltage, current curve and shock wave waveform.
The power and energy that act as calculating analysis according to the data of display unit and depositing to arc channel of output unit
Speed and size.
Control unit is the core of shock wave generation device of the present invention, and it acts as the examinations according to display unit, output unit
Compared with setting value or the reference curve of testing value or trial curve and setup unit, if measured value, trial curve and setting value, reference
Curve has deviation, and control unit sends out control signal, acts on the control button of drive module 6 or high-voltage DC power supply 1, makes arteries and veins
Impulse electricity voltage or pole clearance distance change, and making the state of discharge system, optimization swashs as close as Critical damping state
Intensity of wave；If conversely, measured value, trial curve and setting value, reference curve just without deviation, illustrate apparatus of the present invention and
Its discharge system condition meets the requirement of optimal shock strength, therefore control unit will send out brake signal, carries out liquid electricity therewith
Pulsed discharge shock wave generates experiment.
In embodiments of the present invention, there are two types of the choosing methods of setting value or reference curve：First method is：Setting is just
Behind beginning gap, apply the high voltage pulse of different amplitudes to high-field electrode 4, until discharge current is in nearly half-wave oscillating discharge
State.Voltage value at this time and gap width are the setting value optimized in pulse shock wave generating means under discharging condition thus.The
Two kinds of methods are：Initial setting voltage value, carry out pulsed discharge, if gap does not puncture, pole clearance need to be reduced, until success into
Row pulsed discharge and discharge current is in a half-wave oscillatory regime；If the multiple half-wave oscillating discharges of underdamping, appropriate increasing is needed
Add pole clearance, electric current is finally made to be in a half-wave oscillatory regime.Voltage value at this time and pole clearance value i.e. condition thus
The setting value optimized in lower pulse shock wave generating means.
In embodiments of the present invention, after the setting value of optimization determines, using optimally setting value as initial discharge condition, setting
The reference curve of discharge voltage or electric current, trim voltage or pole clearance make it meet ideal discharge voltage or current curve,
The cooperation of charging voltage and clearance distance at this time is optimal discharge condition, and the shock strength of acquisition is most strong.
In embodiments of the present invention, Rogowski coil, flexible current probe etc. can be used in discharge current measurement, according to electric discharge electricity
Stream can establish its corresponding relationship with pulse shock wave.
In embodiments of the present invention, the probes such as Tektronix, Northstar can be used in the measurement of discharge voltage, according to electricity
The measured value of stream and voltage, output unit can ask for output power and energy, and reference is provided for optimization shock strength.
In embodiments of the present invention, output unit is using voltage, electric current and the pulse shock wave in each discharge process as defeated
Enter, analysis calculates the changing rule of power and energy in discharge process, if output power waveform is vibrated for half-wave, deposits to electricity
The energy highest of talking path, energy conversion efficiency can reach 15%~30%, be 2~3 times of routine techniques energy conversion efficiency.
In embodiments of the present invention, the voltage of measurement, electric current, the output power of calculating, output energy respectively with it is corresponding
Setting value or reference curve compare, to analyze the extent of deviation of measured value and setting value.
In embodiments of the present invention, if measured value and setting value deviation be very big or experiment curv and reference curve deviation compared with
Greatly, control unit by the control button control interpolar clearance distance for sending out instruction control drive module 6 or sends out signal change
The output high pressure range-adjusting discharge voltage of high voltage power supply 1, by drive module 6, transmission module 7, position inspection module 8 and monitoring mould
The feedback regulation control of block 9 finally makes pulse discharge circuit be in Critical damping state, even if electric current or power are about one and half
Wave oscillatory regime makes the energy of storage capacitor deposit to pole clearance within the shorter time, and raising is converted to shock wave mechanical energy
Energy, and then improve shock strength.
In embodiments of the present invention, since high-temperature electric arc can that clearance distance occurs be thin ablation motor tip after discharging every time
Micro- variation, therefore the control unit of monitoring module 9 can detect the change of pole clearance, after the completion of pulsatile once electric discharge,
Automatic regulating gap distance is setting value, it is ensured that the consistency of each pulsed discharge while improving shock strength, ensures to swash
Wave dispersibility is smaller, improves the reliability of liquid electric pulse shock wave optimization device.
The charging system of the present invention is energized to discharge system, is formed high pressure pulse discharge and is formed pulse shock wave.Swash to improve
The intensity of wave, and reduce the dispersibility of pulsed discharge shock wave, the present invention, which is provided with, can form the drive module 6 of feedback regulation, pass
Dynamic model block 7, position inspection module 8 and monitoring module 9；Once monitoring module 9 detects setting value or reference curve and measured value or survey
The deviation of curve is measured, control drive module 6 and transmission module 7 are linked, being moved to direction initialization for control high-field electrode 4 is adjusted
Whole clearance distance.When once position, inspection module 8 detects pole clearance as setting value, monitoring module 9 will send out brake signal, at this time
It keeps discharging condition constant, carries out pulsed discharge shock wave therewith and generate experiment.According to the measuring unit measured value of monitoring module 9 or
Experiment curv repeats above-mentioned adjustment process.So far, the closed loop feedback adjusting that can be driven a vehicle to pole clearance, successive optimization electric discharge shape
State makes discharge system be in the Critical damping state of relatively optimization always, realizes the high efficient and reliable regulation and control to shock strength.
Fig. 1 is pulse shock wave formation basic theory schematic diagram of the embodiment of the present invention；Fig. 2 is shock wave tune provided in an embodiment of the present invention
Control the functional block diagram of device；Fig. 3 is the structure diagram of shock wave regulation device provided in an embodiment of the present invention；The shock wave generates dress
Put including：Charge and discharge device and feedback regulation device；Wherein charge and discharge device includes：High-voltage DC power supply 1, storage capacitor 2, height
Compress switch 3, high-field electrode 4 and low-field electrode 5；Feedback regulation device includes：Drive module 6, transmission module 7, position 8 and of inspection module
Monitoring module 9；The both ends of high-voltage DC power supply 1 are connect respectively with storage capacitor 2；One termination high-voltage switch gear 3 of storage capacitor 2
One end, another termination high-field electrode 4 of high-voltage switch gear 3 are connected；Another termination end low-field electrode 5 of storage capacitor 2.High-field electrode
4 place with 5 space coaxial-symmetrical of low-field electrode, and high-field electrode 4 and low-field electrode 5 are placed directly in liquid medium, high pressure
Electrode 4 forms pole clearance with low-field electrode 5.
The premise of pulse shock wave applies high voltage pulse and punctures pole clearance for high-field electrode 4 and low-field electrode 5, shape
Into arc channel.High voltage pulse generates process：The variable high pressure of 1 output amplitude of high-voltage DC power supply, fills not to storage capacitor 2
With the voltage of amplitude.If the terminal voltage of storage capacitor 2 reaches discharging condition, pass through triggering and conducting high-voltage switch gear 3, storage capacitor 2
Voltage instantaneous be applied to pole clearance, most the whole electric energy of storage capacitor 2 are deposited in fluid gap at last, are formed pulse and are swashed
Wave.Every time after electric discharge, above-mentioned charging process is repeated again.
Feedback regulation device ensures discharge system close to critical by automatic regulating voltage value or pole clearance value as far as possible
Damp the state of electric discharge.Feedback regulation device is formed by drive module 6, transmission module 7, position inspection module 8, monitoring module 9, is driven
6 one end of module is connect with the first chuck of transmission module 7, and the other end is connected with one end of monitoring module 9；Transmission module 7
One end is fixedly connected with the rotating guide of drive module 6, and the other end is fixedly connected with high-field electrode 4；Position 8 one end of inspection module
It is connect with high-field electrode 4, position inspection 8 other end of module is connect with the other end of monitoring module 9, and synergistic effect is formed between interpolar
The control of gap, and then optimize shock strength.
The power resources of the electrode movement in order to control of drive module 6, including control button, driving motor and rotating guide.It drives
The operation principle of dynamic model block 6 is：If control button is adjusted to rotating forward state, driving motor drives rotating guide to rotate forward, if control is pressed
Button adjusting is to inverted status, and driving motor drives rotating guide reversion, and the rotation of rotating guide will by the gear of transmission module 7
Be converted to movement.
Transmission module 7 is made of the first chuck, gear and the second chuck, and the first chuck is fixedly connected with rotating guide, tooth
Rotating guide is converted to moving horizontally for the second chuck by wheel.Second chuck is fixedly connected with high-field electrode 4, is then revolved
The rotating of transduction bar can drive the second chuck and high-field electrode 4 move horizontally together by the gearing of gear, so as to adjust
Control the relative position of high-field electrode 4.
Position inspection module 8 is made of measuring unit, sensing unit, receiving unit, converting unit.Measuring unit passes through optical signal
Or magnetic field signal measures the relative position of high-field electrode 4, and measuring signal is sent to receiving unit by sensing unit, converts
Unit converts analog signals into digital signal, realizes the measurement to 4 relative position of high-field electrode, and measurement accuracy can reach
0.1mm。
Monitoring module 9 is the nucleus module of the embodiment of the present invention, including setup unit, display unit, output unit and control
Unit processed.Setup unit is act as：According to previous theoretical calculation or result of the test, one group of setting value of initial setting or with reference to bent
Line, setting value can be discharge voltage value and pole clearance value, and reference curve is discharge voltage or current curve；The work of display unit
It is intuitively shown with for the signal that measuring unit obtains is converted into curve, including discharge voltage, current curve and is swashed
Wave waveform；
The power and energy that act as calculating analysis according to the data of display unit and depositing to arc channel of output unit
Speed and size；Control unit is the core of shock wave generation device of the present invention, and it acts as according to display unit, output unit
Test value or trial curve compared with the setting value of setup unit or reference curve, if measured value, trial curve and setting value,
Reference curve has deviation, and control unit sends out control signal, acts on the control button of drive module 6 or high-voltage DC power supply 1,
Change pulse discharging voltage or pole clearance distance, make the state of discharge system as close as Critical damping state, it is excellent
Change shock strength.
The choosing method of setting value or reference curve is as follows：First method：After setting primary clearance, to high-field electrode 4
Apply the high voltage pulse of different amplitudes, until discharge current is in the state of nearly half-wave oscillating discharge.Voltage value at this time
It is the setting value that optimizes in pulse shock wave generating means under discharging condition thus with gap width；Second method：Initial setting electricity
Pressure value carries out pulsed discharge, if gap does not puncture, need to reduce pole clearance, until successfully carrying out pulsed discharge and discharge current
In a half-wave oscillatory regime；If the multiple half-wave oscillating discharges of underdamping, appropriate increase pole clearance is needed, finally makes electric current
In a half-wave oscillatory regime.Voltage value at this time and pole clearance value i.e. thus under the conditions of it is excellent in pulse shock wave generating means
The setting value of change.
Output unit is using the voltage of measuring unit, electric current and pulse shock wave in each discharge process as input, analysis meter
The changing rule of power and energy in discharge process is calculated, if output power waveform is vibrated for half-wave, deposits to telephone channel
Energy highest, energy conversion efficiency can reach 15%~30%, be 2~3 times of traditional approach discharge energy transfer efficiency.
Voltage, the electric current of measurement, the output power of calculating, output energy respectively with corresponding setting value or reference curve phase
Compare, to analyze the extent of deviation of measured value and setting value.
If measured value and setting value deviation be very big or experiment curv and reference curve deviation it is larger, control unit will send out finger
It enables the control button control interpolar clearance distance of control drive module 6 or sends out the output high pressure that signal changes high voltage power supply 1
Range-adjusting discharge voltage examines module 8 and the feedback regulation control of monitoring module 9 by drive module 6, transmission module 7, position,
Finally pulse discharge circuit is made to be in Critical damping state, even if electric current or power are about a half-wave oscillatory regime, make energy storage
The energy of capacitance deposits to pole clearance within the shorter time, improves the energy for being converted to shock wave mechanical energy, and then improve and swash
Intensity of wave.
Since high-temperature electric arc meeting ablation motor tip makes clearance distance that subtle variation, monitoring occur after discharging every time
The control unit of module 9 can detect the change of pole clearance, and after the completion of pulsatile once electric discharge, automatic regulating gap distance is
Setting value, it is ensured that the consistency of each pulsed discharge while improving shock strength, ensures that shock wave dispersibility is smaller, improves
Liquid electric pulse shock wave optimizes the reliability of device.
The specific work process of monitoring device 9 is：Only by taking the 2nd kind of method as an example.Once monitoring module 9 detects setting value
Or reference curve and the deviation of measured value or experiment curv, control drive module 6 and transmission module 7 are linked, control high-voltage electricity
Being moved to direction initialization for pole 4, adjusts clearance distance.When the non-setting value in the position inspection detection of module 8 pole clearance, prison will be informed
Module 9 is controlled, monitoring module 9 will send out brake signal, and can carry out pulsed discharge therewith.It is surveyed according to the measuring unit of monitoring module 9
Magnitude or experiment curv repeat above-mentioned adjustment process.So far, the closed loop feedback adjusting that can be driven a vehicle to pole clearance, successive optimization
Discharge condition makes discharge system be in the Critical damping state of relatively optimization always, realizes the high efficient and reliable regulation and control to shock strength.
Current curve when Fig. 4 shows half wave number of different oscillations.Now by taking current curve a as an example, t0Moment, pole clearance quilt
Apply maximum charging voltage.By t0To t1Interval in, interpolar discharge electric current is very low.t1Moment, gap electrical breakdown, electric discharge electricity
Stream increased dramatically and start oscillatory extinction, and arc channel is formed and expanded, and pulse shock wave is formed, until being stored in storage capacitor
Electric energy is all converted to the energy of other forms, i.e. t2Moment current oscillation process terminates, at this time energy deposition process experience 106
μs.The useless energy of the consumption such as light radiation, heat radiation increases during more half wave number of oscillation, longer discharge time guiding discharge
Add, the energy for being converted into shock wave reduces, it is therefore desirable to adjust clearance distance or charging voltage amplitude changes discharge system damping.This
Place ensures that discharge voltage peak value is constant for 30kV, adjusts clearance distance by automatic cycle, makes the discharge current oscillatory extinction time
It reduces.Current curve a shows that discharge system damping is less than normal, it is therefore desirable to increase pole clearance, after adjusting clearance distance twice, put
Electric current curve is respectively curve b and curve c.It is clear that half wave number of current oscillation gradually reduces, sedimentary energy takes difference
For 84 μ s and 54 μ s.Curve c shows second half crest value very little, the 5% of about first half crest value, discharge system is approximate
In a half-wave discharge state, as make the highest preferable states of shock strength.
Fig. 5 is Shock Wave Characteristics corresponding with Fig. 4.The shock wave curve a of discharge current curves a~c difference corresponding diagrams 4 of Fig. 4
~c.The positive peak of shock wave curve 1 is 3.5MPa, during identical charging voltage, after adjusting pole clearance, and shock wave curve b and curve c
Shock strength 7.4MPa is incrementally increased by 5.5MPa, shock wave efficiency improves 200%.Existing result of the test shows to fill
Piezoelectric voltage is 30kV, when discharge system condition is constant, it is contemplated that the dispersibility of pulsed discharge, maximum shock strength is in curve c
In the range of change by a small margin.
Conventional pulse shock wave producing method is discharged for underdamped oscillation, this mode arc impedance is small, energy deposition velocity
Slow and numerical value is few, and the useless energy loss such as light radiation, heat radiation increases, therefore the energy for being converted into shock wave is reduced, shock strength
It is weaker, after multiple discharge the change of pole clearance reduce the reliability of device.And the liquid electric pulse shock wave optimization dress of the present invention
It puts and is to increase regulator control system the reason of improving shock strength, this system can be closed according to setting value and the deviation of measured value
Ring feedback regulation voltage value and pole clearance value for more excellent state and maintain this discharge condition to stablize, and make discharge current or output work
Rate is approximately the arc impedance for closing on damping discharge condition, increasing electric discharge formation of a half-wave oscillation, then more energy
Amount will deposit to pole clearance with quickly speed, increase energy conversion efficiency.
As it will be easily appreciated by one skilled in the art that the foregoing is merely illustrative of the preferred embodiments of the present invention, not to
The limitation present invention, all any modification, equivalent and improvement made all within the spirits and principles of the present invention etc., should all include
Within protection scope of the present invention.
Claims (5)
1. a kind of liquid electric pulse shock wave generation device, which is characterized in that including：Charge and discharge device and feedback regulation device；
The charge and discharge device includes：High-voltage DC power supply (1), storage capacitor (2), high-voltage switch gear (3), high-field electrode (4) and
Low-field electrode (5)；One end of the storage capacitor (2) is connected to one end of the high-voltage switch gear (3), the high-voltage switch gear (3)
The other end be connected to the first control terminal of the high-field electrode (4)；The other end of the storage capacitor (2) is connected to described low
One end of piezoelectricity pole (5)；
The feedback regulation device includes：Drive module (6), transmission module (7), position inspection module (8) and monitoring module (9)；Institute
The output terminal for stating drive module (6) is connect with the input terminal of the transmission module (7), the input terminal of the drive module (6) with
The output terminal connection of the monitoring module (9)；Second input terminal of the high-field electrode (4) is defeated with the transmission module (7)
Outlet connects, and the input terminal of institute's rheme inspection module (8) is connect with the first output terminal of the high-field electrode (4), the monitoring mould
The first input end of block (9) is connected to the output terminal of institute's rheme inspection module (8), and the second input terminal is connected to the high-field electrode
(4) second output terminal；
By applying high voltage pulse to high-field electrode (4) and low-field electrode (5), high temperature and pressure plasma is formed, plasma is fast
Speed expansion compression liquid water forms pulse shock wave；High-field electrode (4) and low-field electrode (5) are accurately controlled by feedback regulation device
Relative position and the high voltage pulse applied, increase interpolar plasma impedance, always in closely facing when ensureing electric discharge every time
The underdamping state of boundary's damping state rather than routine, improves energy conversion efficiency, reaches pulse shock wave intensity as much as possible
It is optimal；
The monitoring module (9) includes：Setup unit, display unit, output unit and control unit；
For the setup unit for setting one group of setting value or reference curve, the setting value is discharge voltage value and pole clearance
Value, the reference curve are discharge voltage or current curve；
The display unit is used to the signal that the measuring unit in institute's rheme inspection module (8) obtains being converted into curve and show；
The output unit is used for the power and energy that calculate analysis according to the data of the display unit and deposit to arc channel
Speed and size；
Described control unit is used for according to display unit, the test value of output unit or the setting value of trial curve and setup unit
Or reference curve compares, and when measured value or trial curve are respectively and when setting value or reference curve have deviation, controls drive module
(6) control button or high-voltage DC power supply (1) in so that pulse discharging voltage or pole clearance distance change, and make the electric discharge be
The state of system optimizes shock strength as close as Critical damping state；When measured value or trial curve respectively with setting value
Or reference curve, when not having deviation, control unit will send out brake signal, carry out liquid pulse electro discharge shock wave and generate experiment.
2. liquid electric pulse shock wave generation device as described in claim 1, which is characterized in that the high-field electrode (4) with it is described
Low-field electrode (5) space coaxial-symmetrical is placed, and the high-field electrode (4) and the low-field electrode (5) are placed directly in liquid
In medium, the high-field electrode (4) forms pole clearance with the low-field electrode (5).
3. liquid electric pulse shock wave generation device as described in claim 1, which is characterized in that the drive module (6) includes：According to
Control button, driving motor and the rotating guide of secondary connection；
When the control button is adjusted to rotating forward state, the driving motor drives the rotating guide to rotate forward；When the control
When button is adjusted to inverted status, the driving motor drives the rotating guide reversion, and the rotation of the rotating guide passes through institute
It states transmission module (7) and is converted to movement.
4. such as claim 1-3 any one of them liquid electric pulse shock wave generation devices, which is characterized in that the transmission module
(7) include：The first chuck, gear and the second chuck set gradually；
Input terminal of the input terminal of first chuck as the transmission module (7), the gear are used for the driving mould
Rotating guide is converted to moving horizontally for the second chuck in block (6)；The output terminal of second chuck is as the biography
The output terminal of dynamic model block (7), the forward and backward of rotating guide can pass through the gearing of the gear in the drive module (6)
Second chuck and the high-field electrode (4) is driven to move horizontally together, so as to regulate and control the opposite position of the high-field electrode (4)
It puts.
5. such as claim 1-3 any one of them liquid electric pulse shock wave generation devices, which is characterized in that institute's rheme inspection module
(8) include：Converting unit, receiving unit, sensing unit and measuring unit；
The measuring unit is used to measure the relative position of the high-field electrode (4) by optical signal or magnetic field signal, and will survey
Amount signal is sent to the receiving unit by the sensing unit, and the converting unit is used to convert analog signals into number
Signal realizes the measurement to the high-field electrode (4) relative position.
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| CN110596443B (en) * | 2019-10-23 | 2024-06-11 | 安徽理工大学 | Electrode spacing adjustable integrated underwater high-voltage pulse discharge device |
| CN110780239A (en) * | 2019-11-13 | 2020-02-11 | 南方电网科学研究院有限责任公司 | Shock wave generating device and test system for simulating disturbance of liquid in transformer |
| CN111042784A (en) * | 2019-12-12 | 2020-04-21 | 龚大建 | High-voltage discharge electrode with self-correcting function |
| CN111157861A (en) * | 2020-01-20 | 2020-05-15 | 南方电网科学研究院有限责任公司 | Heavy current electric arc shock wave detection system |
| CN111157862A (en) * | 2020-01-20 | 2020-05-15 | 南方电网科学研究院有限责任公司 | Large-current impact discharge arc detection system |
| CN113575657B (en) * | 2021-07-06 | 2022-08-02 | 华中科技大学 | Pork steak tenderizing device and method based on liquid-electric pulse shock waves |
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| US6264802B1 (en) * | 1997-06-23 | 2001-07-24 | Alexandr Semenovich Kamrukov | Method and device for UV treatment of liquids, air and surfaces |
| JP3773764B2 (en) * | 2000-07-07 | 2006-05-10 | 株式会社神戸製鋼所 | Liquid processing method and apparatus |
| EP1473103A4 (en) * | 2000-09-20 | 2008-02-13 | Mitsubishi Electric Corp | Electric discharge machining device and electric discharge machining method |
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