CN105910964A - Double-excitation solenoid type particle sensing device adopting wave inhibiting - Google Patents

Abstract

The invention relates to a double-excitation solenoid type particle sensing device adopting wave inhibiting. The double-excitation solenoid type particle sensing device is arranged on a hydraulic pipeline; a filter, a separating and adsorbing module, a rotary shaping module, an excitation coil I, an induction coil and an excitation coil II are sequentially arranged on the hydraulic pipeline; the excitation coil I and the excitation coil II are reversely connected in series; the induction coil is positioned at the center between the excitation coil I and the excitation coil II; an ECU (electronic control unit) is electrically connected with the filter, the separating and adsorbing module, the rotary shaping module, the excitation coil I, the excitation coil II and the induction coil, and is used for controlling the filter, the separating and adsorbing module, the rotary shaping module, the excitation coil I, the excitation coil II and the induction coil; the filter adopts a working condition self-adaptive wave inhibiting filter; the separating and adsorbing module consists of a mechanical centrifugal module, a magnetizing module, a magnetic adsorbing module, an electrifying module and an electric adsorbing module which are sequentially connected. The double-excitation solenoid type particle sensing device has the advantages that the non-contact measuring type is adopted; the signature consistency is good, the reliability is good, the strength of detection signal is high, the error is little, and the like.

Description

A kind of employing presses down the double excitation solenoid type microgranule sensor of ripple

[technical field]

The present invention relates to a kind of hydraulic oil wear particle detection device, be specifically related to a kind of employing and press down the double excitation helical of ripple Tubular type microgranule sensor, belongs to technical field of hydraulic equipment.

[background technology]

Abrasion is one of principal element of component of machine inefficacy, and wear particle is monitoring wear process and diagnosis abrasion The most directly information word of failure type.Statistics both domestic and external show, hydraulic machinery 70% fault be derived from fluid Grain pollutes.Therefore, the metallic wear particles in fluid is carried out on-line monitoring and has become minimizing abrasion and hydraulic system clamping card One of important channel of puckery fault.

Inductance type transducer belongs to non-contact measurement, and in fluid, material and the quantity of contained metallic wear particles make biography Sensor equivalent inductance changes, thus realizes the on-line monitoring of wear particle.Chinese invention patent the 201310228772.6th Number disclosing a kind of fluid metal worn particle on-line monitoring system, this fluid metal worn particle on-line monitoring system includes sensor, micro- Processor and circuit, its sensor is solenoid type inductance sensor.When using this system to carry out on-line monitoring, first by two The excitation coil parallel connection of identical sensor accesses excitation AC signal generator, by two induction coil differential concatenations and with two The big resistance of the resistance such as individual is connected into AC bridge；Then make the oil circuit of a fluid sensor from which passes through.Work as sensor In an oil circuit containing excitation coil and induction coil by the fluid containing metal worn particle, another is obstructed out-of-date, metal Abrasive particle affects the magnetic field intensity of sensor, destroys the balance of electric bridge, the alternating voltage of induction coil output respective magnitudes.Output electricity Pressure size and metal worn particle concentration are directly proportional, and the metal worn particle concentration contained in fluid is the biggest, and output voltage values is the biggest.Logical Cross system processing module to output signal collection and process, reach the purpose to fluid metal worn particle concentration on-line monitoring.

But, there is the deficiency of following several respects in above-mentioned monitoring method:

1. the magnetic fluctuation that metallic wear particles causes when flowing through test coil is the faintest, the output result of detection coil Affected relatively big by microgranule Negotiation speed, in pipeline, pressure and the flowed fluctuation of fluid will have a strong impact on having of inductance method detection of particulates Effect property and concordance.

2. the galling abrasive particle in machine oil can be divided into ferromagnetics microgranule (such as ferrum) and non-according to its electromagnetic property Ferromagnetics microgranule (such as copper, aluminum).Ferromagnetics microgranule strengthens the equivalent inductance of cell winding, and non-ferromagnetic material microgranule then weakens biography The equivalent inductance of sensor coil.When two kinds of microgranules are simultaneously by detection coil, this monitoring device will lose efficacy.

The particle diameter of metallic wear particles is less the most under normal circumstances, at about 5um, and predominantly ball milling grain, its fiber number is little In other abrasive particles, cell winding is relatively weak to its power of test.Such as patent documentation 1, can only to process the metal of about 10um micro- Grain, it is impossible to the premature wear of monitoring parts.

4. the magnetic induction density B in solenoid is non-uniform Distribution along its axis direction, and this will cause serious measurement by mistake Difference；The inductance of the most same model is greater than the power of test to copper granule to the power of test of Ferrous particles, and this equally can Bring measurement error.

Therefore, for solving above-mentioned technical problem, the employing of a kind of innovation of necessary offer presses down the double excitation solenoid of ripple Decline a sensor, to overcome described defect of the prior art.

[summary of the invention]

For solving above-mentioned technical problem, it is an object of the invention to provide a kind of employing non-contacting metering system, signal Concordance is good, reliability is high, detect the employing that signal is strong and error is little presses down the double excitation solenoid type microgranule sensor of ripple.

For achieving the above object, the technical scheme that the present invention takes is: a kind of employing presses down the double excitation solenoid of ripple and declines Grain sensor, it is arranged on fluid pressure line, and it includes wave filter, separates adsorption module, rotates moulding module, excitation coil I, excitation coil II, induction coil and ECU；Wherein, described wave filter, separate adsorption module, rotate moulding module, excitation line Circle I, induction coil, excitation coil II are successively set on fluid pressure line；Described excitation coil I and excitation coil II reversely goes here and there Connection；Described induction coil central authorities between excitation coil I and excitation coil II；Described ECU is electrically connected with and controls Wave filter, separate adsorption module, rotate moulding module, excitation coil I, excitation coil II and induction coil；Described wave filter bag Include input pipe, shell, outlet tube, elastic thin-wall, H mode filter and cascaded H mode filter；Wherein, described input pipe connects In one end of shell, it extends in shell, itself and hydraulic oil inlet docking；Described outlet tube is connected to another of shell End, it extends in shell, and itself and U-shaped separation of particles module are docked；Described elastic thin-wall is installed on shell along the radial direction of shell In；Described input pipe, outlet tube and elastic thin-wall are collectively forming a two-tube slip-on filter；In the axial direction of described elastic thin-wall Uniformly have some taper structure changes damping holes；Described taper structure changes damping hole is by cone shaped elastic damping hole pipe and slot apertures group Become；Resonance series cavity volume I and parallel resonance cavity volume is formed between described elastic thin-wall and shell；Described resonance series cavity volume I Outside set a resonance series cavity volume II, between described resonance series cavity volume I and resonance series cavity volume II by one taper insert Pipe connects；This taper inserts pipe near input tube side；Described H mode filter is positioned at parallel resonance cavity volume, and itself and taper become knot Structure damping hole is connected；Described cascaded H mode filter is positioned at resonance series cavity volume I and resonance series cavity volume II, and it also and is bored Deformation structure damping hole is connected；Described H mode filter and cascaded H mode filter are axially symmetrical set, and form connection in series-parallel H Mode filter；Described separation adsorption module is by the mechanical centrifugal module being sequentially connected with, magnetized module, magnetic suck module, electrification mould Block and electric adsorption module composition.

The employing of the present invention presses down the double excitation solenoid type microgranule sensor of ripple and is further arranged to: described input pipe and The axis of outlet tube is the most on the same axis；The wider place of described taper structure changes damping hole opening be positioned at resonance series cavity volume I and In parallel resonance cavity volume, its taper angle is 10 °；The Young's modulus ratio of described taper structure changes damping hole cone shaped elastic damping hole pipe The Young's modulus of elastic thin-wall wants big, can be with change in fluid pressure stretching or compression；The Young's modulus of slot apertures hinders than cone shaped elastic The Young's modulus of Buddhist nun hole pipe wants big, can be with fluid opened by pressure or closedown；Described taper is inserted the wider place of tube opening and is positioned at series connection In resonance cavity volume II, its taper angle is 10 °.

The employing of the present invention presses down the double excitation solenoid type microgranule sensor of ripple and is further arranged to: described mechanical centrifugal Module uses eddy flow to be centrifuged module；Described eddy flow is centrifuged module and includes eddy flow tube wall, the first flow deflector, the second flow deflector, stepping Motor and flow transducer；Wherein, described first flow deflector is provided with 3, these 3 first flow deflectors along tube wall inner periphery every 120 ° are uniformly distributed, and its laying angle is set to 18 °；Described second flow deflector and the first flow deflector structure are identical, and it is arranged on first After flow deflector, and and the first flow deflector stagger 60 ° and be connected in tube wall, its laying angle is set to 36 DEG C；Described first flow deflector Long limit is connected with tube wall, and minor face extends along the axis of tube wall；Its leading edge frustrates into obtuse, and trailing edge is processed into wing, and its height is pipe 0.4 times of wall diameter, 1.8 times of a length of tube wall diameter；Described motor connects and drives the first flow deflector and second to lead Flow, to regulate laying angle；Described flow transducer is arranged on the central authorities in tube wall.

The employing of the present invention presses down the double excitation solenoid type microgranule sensor of ripple and is further arranged to: described magnetized module Including aluminum matter pipeline, some windings, iron shell and flange；Wherein, described some windings are rotating around outside aluminum matter pipeline；Institute State iron shell to be coated on aluminum matter pipeline；Described flange welding is at the two ends of aluminum matter pipeline.

The employing of the present invention presses down the double excitation solenoid type microgranule sensor of ripple and is further arranged to: described magnetic suck mould Block uses homopolarity adjacent type absorbing ring, and this homopolarity adjacent type absorbing ring includes aluminium ring shape pipeline, forward solenoid, reverse helical Pipe and irony magnetic conduction cap；Described forward solenoid and reverse solenoid are respectively arranged in aluminium ring shape pipeline, and both are connected with Electric current in opposite direction so that forward solenoid and reverse solenoid adjacent produce like pole；Described irony magnetic conduction cap cloth Be placed on the inwall of aluminium ring shape pipeline, its be positioned at forward solenoid and reverse solenoid adjacent and forward solenoid and The intermediate point of reverse solenoid axis.

The employing of the present invention presses down the double excitation solenoid type microgranule sensor of ripple and is further arranged to: described magnetic suck mould Block uses the homopolarity adjacent type absorbing ring of charged hammer, and the homopolarity adjacent type absorbing ring of this charged hammer includes aluminium ring shape pipe Road, forward solenoid, reverse solenoid, irony magnetic conduction cap, dividing plate, electric shock hammer and electric magnet；Described forward solenoid is with anti- Being respectively arranged in aluminium ring shape pipeline to solenoid, both are connected with electric current in opposite direction so that forward solenoid is with reverse Solenoid adjacent produces like pole；Described irony magnetic conduction cap is arranged on the inwall of aluminium ring shape pipeline, and it is positioned at forward Solenoid and reverse solenoid adjacent and forward solenoid and the intermediate point of reverse solenoid axis；Described dividing plate is positioned at Between forward solenoid and reverse solenoid；Described electric shock hammer and electric magnet are between dividing plate；Described electric magnet connects and energy Promote electric shock hammer, make electric shock hammer tap aluminium ring shape inner-walls of duct.

The employing of the present invention presses down the double excitation solenoid type microgranule sensor of ripple and is further arranged to: described electrification module Including some electrodes and an electrode controller；Described some electrodes are installed on fluid pressure line, and it is respectively connecting to electrode control Device processed.

The employing of the present invention presses down the double excitation solenoid type microgranule sensor of ripple and is further arranged to: described electro-adsorption mould Block includes aluminum matter pipeline, positive plate, minus plate and pole plate controller；Wherein, described positive plate, minus plate are separately positioned on aluminum On matter pipeline, and in being oppositely arranged；Described positive plate, minus plate are respectively and electrically connected on pole plate controller；Described pole plate control Device processed is electrically connected to ECU, and by ECU control.

The employing of the present invention presses down the double excitation solenoid type microgranule sensor of ripple and is further arranged to: described rotation is moulding Module includes aluminum matter pipeline, some windings, iron shell, flange and the moulding current output module of some rotations；Wherein, described Some windings are rotating around outside aluminum matter pipeline；Described iron shell is coated on aluminum matter pipeline；Described flange welding is at aluminum matter pipe The two ends in road；The moulding current output module of each rotation is connected to a winding.

The employing of the present invention presses down the double excitation solenoid type microgranule sensor of ripple and is also configured to: described excitation coil I and Excitation coil II all comprises some windings, and each winding is made up of positive winding and inverse winding, and each winding is respectively connecting to an excitation electricity Stream output module, this exciting current output module is controlled by ECU module.

Compared with prior art, there is advantages that present invention introduces oil liquid pressure flowed fluctuation suppresses Technology and microgranule timesharing release measure, to ensure effectiveness and the concordance of detection；By mechanical centrifugal, magnetization absorption, electrification The technology such as absorption by ferromagnetics microgranule and non-ferromagnetic material separation of particles, affect testing result preventing two kinds of microgranules from interfering with each other； By aggregation of particles and rotating excitation field moulding increase grain diameter and change its form, to improve the sensitivity of detection；By changing Enter the uniformity along its axis direction of the magnetic induction in solenoid coil structural adjustment solenoid, to reduce detection error； Construct zero magnetic field, the outside field coil differential concatenation (double excitation solenoid) that two are driven by high-frequency ac power, the magnetic of generation Field direction is contrary, can make to be placed exactly in magnetic field at central sensory coil at tube interior and cancel out each other, be zero magnetic field, it is ensured that magnetic The biggest variation rate of magnetic flux can be obtained when variations of flux is less, to improve detection sensitivity, reduce follow-up signal and process electricity Road requirement.

[accompanying drawing explanation]

Fig. 1 is the overall structure schematic diagram that the employing of the present invention presses down the double excitation solenoid type microgranule sensor of ripple.

Fig. 2 is the structural representation of the wave filter in Fig. 1.

Fig. 3 is the profile in Fig. 2 along A-A.

Fig. 4 is H mode filter schematic diagram in Fig. 3.

Fig. 5 is cascaded H mode filter schematic diagram in Fig. 3.

Fig. 6 is H mode filter and cascaded H mode filter frequency characteristic constitutional diagram.Wherein, solid line is cascaded H mode filter Frequency characteristic.

Fig. 7 is connection in series-parallel H mode filter frequency characteristic figure.

Fig. 8 is the structural representation of Double-pipe plug-in type wave filter.

Fig. 9 is the cross sectional representation of elastic thin-wall.

Figure 10 is the schematic diagram of taper structure changes damping hole in Fig. 2.

Figure 10 (a) to Figure 10 (c) is the working state figure of taper structure changes damping hole.

Figure 11 is the connection diagram separating adsorption module in Fig. 1.

Figure 12-1 is the horizontal schematic diagram of the mechanical centrifugal module in Figure 11.

Figure 12-2 is the radial direction schematic diagram of the mechanical centrifugal module in Figure 11.

Figure 13 is the structural representation of the magnetized module in Figure 11.

Figure 14-1 be the magnetic suck module in Figure 11 be the structural representation of homopolarity adjacent type absorbing ring.

Figure 14-2 is the structural representation of the adjacent type absorbing ring of the homopolarity that magnetic suck module is charged hammer in Figure 11.

Figure 15 is the structural representation of the electrification module in Figure 11.

Figure 16 is the structural representation of the electric adsorption module in Figure 11.

Figure 17 is the structural representation rotating moulding module in Fig. 1.

Figure 18-1 is the structural representation of the winding of the detection coil in Fig. 1.

Figure 18-2 is the circuit diagram of the exciting current output module in Figure 18-1.

Figure 19 is the annexation figure of the ECU module in Fig. 1.

[detailed description of the invention]

Referring to shown in Figure of description 1 to accompanying drawing 19, the present invention is that a kind of employing presses down the double excitation solenoid of ripple and declines Grain sensor, it is arranged on fluid pressure line 7, its by wave filter 8, separate adsorption module 2, rotate moulding module 3, excitation line Several parts compositions such as circle I4, induction coil 5, excitation coil II6 and ECU1.

Wherein, described wave filter 8, separate adsorption module 2, rotate moulding module 3, excitation coil I4, induction coil 5, swash Encourage coil II6 to be successively set on fluid pressure line 7.Described ECU 1 is electrically connected with and controls wave filter 8, separates absorption mould Block 2, rotate moulding module 3, excitation coil I4, excitation coil II5 and induction coil 5.

Owing to the flow velocity of fluid is very big on detection characteristic impact, along with the increase of oil flow, the sensitivity of detection and Output voltage all will occur significant change；Meanwhile, the flow of fluid also has large effect to detection output, when flow increases Time, output voltage is as well as change, and this is very big, to this end, the present invention is in inspection to concordance and the availability influence of testing result Wave filter 8 stable hydraulic system pressure and flow is added before survey.

Described wave filter 8 is by input pipe 81, shell 88, outlet tube 89, elastic thin-wall 87, H mode filter 812 and series connection Several parts compositions such as H mode filter 813.

Wherein, described input pipe 81 is connected to one end of shell 89, is used for inputting fluid；Described outlet tube 811 is connected to The other end of shell 89, itself and separation adsorption module 2 dock.Described elastic thin-wall 87 is installed on shell 88 along the radial direction of shell In.The axis of described input pipe 81 and outlet tube 89 the most on the same axis, so can improve the filter effect of more than 10%.

Described input pipe 81, outlet tube 89 and elastic thin-wall 87 are collectively forming a two-tube slip-on filter, thus decay Hydraulic system high frequency pressure pulsations.The filter transmission coefficient obtained after processing by lumped-parameter method is:

$\mathrm{\γ}=\frac{{\left|Z\right|}^2}{{\left|Z\right|}^2+{\left(\frac{2\mathrm{\ρ}a}{{\mathrm{\πd}}_1^2}\right)}^2}$

Velocity of sound ρ fluid density d in a medium₁Input pipe diameter Z characteristic impedance

$Z=\frac{1}{\frac{1}{Z_1}+\frac{1}{Z_2}+\frac{1}{Z_3}}$

$Z_1=\frac{{\mathrm{\ρl}}_{1}s}{\frac{\mathrm{\π}}{4}(D^2-{d_1}^2)}+\frac{{\mathrm{\ρa}}^2}{\frac{\mathrm{\π}}{4}(D^2-{d_1}^2)l_{1}s}$

$Z_2=\frac{\mathrm{\ρ}Ls}{\frac{\mathrm{\π}}{4}{D}^2}+\frac{{\mathrm{\ρa}}^2}{\frac{\mathrm{\π}}{4}{D}^{2}Ls}$

$Z_3=\frac{{\mathrm{\ρl}}_{2}s}{\frac{\mathrm{\π}}{4}(D^2-{d_2}^2)}+\frac{{\mathrm{\ρa}}^2}{\frac{\mathrm{\π}}{4}(D^2-{d_2}^2)l_{2}s}$

d₂Outlet tube diameter D cavity volume diameter l₁Input inserts length of tube l₂Outfan inserts pipe range Degree L cavity volume total length and input outfan insert the difference of length of tube sum

From above formula, Double-pipe plug-in type cavity volume wave filter is similar with the electric capacity effect in circuit.The pressure of different frequency When pulsating wave is by this wave filter, transmission coefficient is different with frequency.Frequency is the highest, then transmission coefficient is the least, and this shows high frequency Pressure pulse wave decay the most severe when device after filtering, thus serve eliminate high frequency pressure pulsations effect.

The design principle of described Double-pipe plug-in type wave filter is as follows: when in pipeline, the fluctuating frequency of pressure is higher, pressure oscillation Act on convection cell on fluid and produce pinch effect.When the flow of change enters Double-pipe plug-in type cavity volume by input pipe, liquid Stream exceedes average discharge, and the cavity volume of expansion can absorb unnecessary liquid stream, and releases liquid stream when less than average discharge, thus absorbs Pressure fluctuation energy.

Described elastic thin-wall 87 weakens hydraulic system medium-high frequency pressure fluctuation by being forced to mechanical vibration.By lumped parameter The elastic thin-wall natural frequency that method obtains after processing is:

$f_m=\frac{k^{2}h}{2{\mathrm{\πR}}^2}\·\sqrt{\frac{E}{12\mathrm{\ρ}(1+\mathrm{\η})(1-{\mathrm{\μ}}^2)}}$

K elastic thin-walled structures coefficient h elastic thin-wall thickness R elastic thin-wall radius

The mass density of the Young's modulus ρ elastic thin-wall of E elastic thin-wall

The Poisson's ratio of the current-carrying factor mu elastic thin-wall of η elastic thin-wall.

Substitute into actual parameter, above formula is carried out simulation analysis it is found that the natural frequency generally ratio H type of elastic thin-wall 87 The natural frequency of wave filter is high, and its attenuation band is also wide than H mode filter.In relatively wide frequency band range, elastic Thin-walled has good attenuating to pressure fluctuation.Meanwhile, the elastic thin-wall radius in the filter construction of the present invention is bigger And relatively thin, its natural frequency, closer to Mid Frequency, can realize the effective attenuation to the medium-high frequency pressure fluctuation in hydraulic system.

The design principle of described elastic thin-wall 87 is as follows: when producing intermediate frequency pressure fluctuation in pipeline, S type cavity volume is to pressure wave Dynamic damping capacity is more weak, flows into the periodically pulsing pressure continuous action of wave filter S type cavity volume inside and outside elastic thin-wall 87 On wall, owing to having between inside and outside wall, pillar is fixing to be connected, and inside and outside elastic thin-wall is done by the frequency of fluctuation pressure simultaneously and periodically shakes Dynamic, this forced vibration consumes the pressure fluctuation energy of fluid, thus realizes the filtering of Mid Frequency pressure.From the principle of virtual work, The ability that elastic thin-wall consumes fluid pulsation pressure energy is directly related with potential energy during its forced vibration and kinetic energy sum, in order to Improving Mid Frequency filtering performance, the radial design of elastic thin-wall is much larger than pipe radius, and the thickness of thin-walled is less, representative value For less than 0.1mm.

Further, form resonance series cavity volume I84 between described elastic thin-wall 87 and shell 88 and parallel resonance is held Chamber 85.The outside of described resonance series cavity volume I84 sets a resonance series cavity volume II83, described resonance series cavity volume I84 and series connection Inserting pipe 82 by a taper between resonance cavity volume II83 to connect, this taper insertion pipe 82, near input pipe 81 side, makes resonance hold Chamber I and II forms unsymmetric structure, to reduce wave filter natural reonant frequency.Described taper is inserted the wider place of pipe 82 opening and is positioned at In resonance series cavity volume II83, its taper angle is 10 °.Some taper structure changes are uniformly had in the axial direction of described elastic thin-wall 87 Damping hole 86.

Described H mode filter 812 is positioned at parallel resonance cavity volume 85, and it is connected with taper structure changes damping hole 86.Institute State the wider place of taper structure changes damping hole 86 opening and be positioned at resonance series cavity volume I84 and parallel resonance cavity volume 85, its taper angle It it is 10 °.The wave filter natural angular frequency obtained after processing by lumped-parameter method is:

$\begin{array}{cc}\mathrm{\ω}=\frac{a\·D_1}{D_2}\sqrt{\frac{1}{L_1{L}_2}}& (rad/s)\end{array}$

Velocity of sound L in a medium₁The long D of damping hole₁Damping hole diameter

L₂Parallel resonance cavity volume height D₂Parallel resonance cavity volume diameter.

Described cascaded H mode filter 813 is positioned at resonance series cavity volume I84 and resonance series cavity volume II83, and it also and is bored Deformation structure damping hole 86 is connected.After processing by lumped-parameter method, two natural angular frequencies of cascaded H mode filter 813 are:

${\mathrm{\ω}}_1=\frac{\sqrt{\mathrm{\π}}a}{\sqrt{2}\sqrt{{\frac{{\mathrm{\πl}}_1({d_2}^2{l}_2+{d_4}^2{l}_4)}{4{d_1}^2}}_1+\frac{{{\mathrm{\πd}}_4}^2{l}_4{l}_3}{4{d_3}^2}+\sqrt{{\[{\frac{{\mathrm{\πl}}_1({d_2}^2{l}_2+{d_4}^2{l}_4)}{4{d_1}^2}}_1-\frac{{{\mathrm{\πd}}_4}^2{l}_4{l}_3}{4{d_3}^2}\]}^2+\frac{{\mathrm{\π}}^2{d_4}^4{l_4}^2{l}_1{l}_3}{4d_1^2{d}_3^2}}}}$

${\mathrm{\ω}}_2=\frac{\sqrt{\mathrm{\π}}a}{\sqrt{2}\sqrt{{\frac{{\mathrm{\πl}}_1({d_2}^2{l}_2+{d_4}^2{l}_4)}{4{d_1}^2}}_1+\frac{{{\mathrm{\πd}}_4}^2{l}_4{l}_3}{4{d_3}^2}-\sqrt{{\[{\frac{{\mathrm{\πl}}_1({d_2}^2{l}_2+{d_4}^2{l}_4)}{4{d_1}^2}}_1-\frac{{{\mathrm{\πd}}_4}^2{l}_4{l}_3}{4{d_3}^2}\]}^2+\frac{{\mathrm{\π}}^2{d_4}^4{l_4}^2{l}_1{l}_3}{4d_1^2{d}_3^2}}}}$

Velocity of sound l in a medium₁The long d of damping hole₁Damping hole diameter l₃Resonance pipe range

d₃Resonantron diameter l₂Resonance series cavity volume 1 height d₂Resonance series cavity volume 1 diameter

l₄Resonance series cavity volume 2 height d₄Resonance series cavity volume 2 diameter.

Described H mode filter 812 and cascaded H mode filter 813 are axially symmetrical set, and form the filtering of connection in series-parallel H type Device, for broadening frequency filtering scope and make overall structure more compact.The multiple connection in series-parallel H types of the present invention circumferentially interface distributions Wave filter (only depicts 2) in figure, separate with dividing plate 820 each other, and the resonance bands of these multiple wave filter is different, Whole medium and low frequency filtering frequency range can be covered, it is achieved the entire spectrum filtering of medium and low frequency section after combining comprehensively.

All can be found by Fig. 6 H mode filter and cascaded H mode filter frequency characteristic and formula, cascaded H mode filter has 2 Individual natural angular frequency, at crest, filter effect is preferable, does not the most substantially have filter effect at trough；H mode filter has 1 Natural angular frequency, at crest, filter effect is preferable equally, does not the most substantially have filter effect at trough；Select suitably filter Ripple device parameter, makes the natural angular frequency of H mode filter just fall between 2 natural angular frequencies of cascaded H mode filter, such as figure Shown in 7, in certain frequency range, both defined the natural reonant frequency peak value of 3 next-door neighbours, in this frequency range, no matter The fluctuating frequency of pressure is at crest or all can guarantee that preferable filter effect at trough.Multiple connection in series-parallel H mode filter structures The bank of filters become both can cover whole medium and low frequency section, it is achieved the entire spectrum filtering of medium and low frequency section.

Further, described taper structure changes damping hole 86 is made up of cone shaped elastic damping hole pipe 16 and slot apertures 15, taper Narrow end is opened on elastic thin-wall 87.Wherein the Young's modulus of cone shaped elastic damping hole pipe 16 is than the Young's modulus of elastic thin-wall 87 Want big, can be with change in fluid pressure stretching or compression；The Young's modulus of slot apertures 15 is than the Young mould of cone shaped elastic damping hole pipe 16 Amount wants big, can be with fluid opened by pressure or closedown.Therefore when the fluctuating frequency of pressure falls at high band, c-type cavity volume filter construction Strobing, cone shaped elastic damping hole pipe 16 and slot apertures 15 are all in Figure 10 (a) state；And when ripple frequency falls at Mid Frequency Time, filter construction becomes c-type cavity volume filter construction and elastic thin-wall 87 filter structure concurs, and cone shaped elastic damps Hole pipe 16 and slot apertures 15 are all in Figure 10 (a) state；When ripple frequency falls at some specific Frequency, filter construction Become plug-in type connection in series-parallel H mode filter, c-type cavity volume filter construction and elastic thin-wall filter structure to concur, taper Elastic damping hole pipe 16 and slot apertures 15 are all in Figure 10 (b) state, due to the natural frequency quilt of plug-in type connection in series-parallel H mode filter It is designed as consistent with these particular low frequency ripple frequencies, the system that fundamental frequency energy is big can be played preferable filter effect；Work as arteries and veins Dynamic frequency fall the low-frequency range beyond some characteristic frequency time, cone shaped elastic damping hole pipe 16 and slot apertures 15 are all in Figure 10 (c) State.The design of such structure changes wave filter both ensure that the full frequency band full working scope filtering of hydraulic system, reduces again normal work The pressure loss of wave filter under condition, it is ensured that the hydraulic pressure rigidity of system.

The present invention can also the pulsation decay of solid line operating mode self-adaptive pressure.When hydraulic system working conditions change, both executive components Suddenly stop or running, and when the opening of valve changes, the characteristic impedance of pipe-line system can be caused to undergo mutation, so that former pipe Pressure curve with change in location in time in road changes the most therewith, then the position of pressure peak also changes.Due to the present invention The axial length of wave filter be designed as pulsing wavelength, and the connection in series-parallel H mode filter group of wave filter more than system main pressure Cavity volume length, the length of Double-pipe plug-in type cavity volume wave filter and the length of elastic thin-wall and wave filter axial length equal, protect Demonstrate,prove pressure peak position to be constantly in the effective range of wave filter；And the taper structure changes of connection in series-parallel H mode filter Damping hole is opened on elastic thin-wall, is uniformly distributed in the axial direction so that pressure peak change in location is several to the performance of wave filter Not impact, it is achieved thereby that operating mode adaptive-filtering function.In view of three kinds of filter structure axial dimensions and wave filter phase When, this bigger size also ensure that hydraulic filter possesses stronger pressure fluctuation damping capacity.

The method that the hydraulic filter using the present invention carries out hydraulic pulsation filtering is as follows:

1), hydraulic fluid enters Double-pipe plug-in type wave filter by input pipe, and the cavity volume of expansion absorbs unnecessary liquid stream, completes The filtering of high frequency pressure pulsations；

2), by elastic thin-wall 87 forced vibration, consume the pressure fluctuation energy of fluid, complete the filter of intermediate frequency pressure fluctuation Ripple；

3), by connection in series-parallel H mode filter group, and taper structure changes damping hole, taper insertion pipe and fluid produce altogether Shake, consume pulsation energy, complete the filtering of low frequency pulsation；

4), the axial length of wave filter is designed as more than hydraulic system main pressure pulsation wavelength, and the filter of connection in series-parallel H type Ripple device length, Double-pipe plug-in type filter length and elastic thin-wall 87 length are equal with filter length, make pressure peak position It is constantly in the effective range of wave filter, it is achieved the filtering of pressure fluctuation when system condition changes；

5), by the flexible of the cone shaped elastic damping hole pipe of taper structure changes damping hole and the switch of slot apertures, pressure is completed Pulsation adaptive-filtering.

Galling abrasive particle in machine oil can be divided into ferromagnetics microgranule (such as ferrum) and non-ferric according to its electromagnetic property Magnetic substance microgranule (such as copper, aluminum).Ferromagnetics microgranule strengthens the equivalent inductance of cell winding, and non-ferromagnetic material microgranule then weakens sensing The equivalent inductance of device coil.When two kinds of microgranules are simultaneously by detection coil, this monitoring device will lose efficacy.To this end, the present invention uses Separate adsorption module 2 and separate both microgranules.Described separation adsorption module 2 is by the mechanical centrifugal module 21 being sequentially connected with, magnetic Change module 22, magnetic suck module 23, electrification module 24 and electric adsorption module 25 to form.

Wherein, described mechanical centrifugal module 21 makes fluid under the action of the centrifugal, and the solid particle that quality is bigger is thrown toward chamber Wall, it uses the mode of energy loss, and its design principle is as follows: arrange the water conservancy diversion of the distortion of certain altitude and length in the duct Sheet, and make blade face tangent line angled with axis, fluid can be made to produce spiral flow in pipes, this spiral shell because pipe flow border changes Eddy flow can be analyzed to the circumferential flow around pipe axle and axial straight flowing, and the particulate matter carried in fluid produces off-axis alignment heart spiral shell Rotation motion.This eddy flow centrifugal device 21 is by eddy flow tube wall the 211, first flow deflector the 212, second flow deflector 213, motor 214 And several parts such as flow transducer 215 composition, described motor 214 and flow transducer 215 are electrically connected to ECU1.

Wherein, described first flow deflector 212 is provided with 3, these 3 first flow deflectors 212 along tube wall 211 inner periphery every 120 ° Being uniformly distributed, its laying angle (angle between the first flow deflector 212 and eddy flow tube wall 211) is set to 18 °, optimal tangential to ensure Flowing.Described second flow deflector 213 is identical with the first flow deflector 212 structure, after it is arranged on the first flow deflector 212, and and the One flow deflector 212 staggers 60 ° and is connected in tube wall 211, and its laying angle is set to 36 DEG C, is used for reducing resistance and strengthening circumferential flow Intensity.It addition, the 3rd or more flow deflector can be arranged the most again according to actual separation effect, laying angle gradually increases.Institute State motor 214 connect and drive the first flow deflector 212 and the second flow deflector 213, to regulate laying angle, thus can obtain more Good centrifugal effect, knows and makes flow deflector 212,213 adapt to different operating modes.Described flow transducer 215 is arranged on tube wall 211 Interior central authorities, the ECU1 numerical analysis cyclonic separation effect by reading flow quantity sensor 215, and control motor accordingly 214, motor 214 regulates the laying angle of each flow deflector 212,213, to obtain more separating effect.

Further, the long limit of described first flow deflector 212 is connected with tube wall 211, and minor face 213 is along the axis of tube wall 211 Extend；For reducing resistance, its leading edge frustrates into obtuse；For avoiding streaming, trailing edge is processed into wing；Its height is tube wall 211 diameter 0.4 times, make the spiral flow of formation have bigger intensity；1.8 times of a length of tube wall 211 diameter, bigger right to ensure The sphere of action of fluid.

Described magnetized module 22 is force-magnetized by the ferromagnetic metal wear particle that carries in fluid, and makes micron-sized Wear particle aggregates into bulky grain, can improve the output signal strength of sensor.Described magnetizing assembly 22 is by aluminum matter pipeline 221, some windings 222, iron shell 223 and flange 224 form.Wherein, described aluminum matter pipeline 221 makes fluid flow from which Cross and by magnetization treatment, and the pcrmeability of aluminum is the lowest, can make to obtain in pipeline 221 higher magnetic field intensity.

Described some windings 222, rotating around outside aluminum matter pipeline 221, are coated insulation by the copper wire of a diameter of about 1.0mm Paint is made.Described iron shell 223 is coated on aluminum matter pipeline 221, and the material of irony can mask most magnetic flux.Described Flange 224 is welded on the two ends of aluminum matter pipeline 221.

Described magnetic suck module 23 is polymerized big microgranule for adsorpting aggregation in the magnetization of near-wall, and it can use homopolarity phase Adjacent type absorbing ring.This homopolarity adjacent type absorbing ring by aluminium ring shape pipeline 231, forward solenoid 232, reverse solenoid 233 with And the parts such as irony magnetic conduction cap 234 composition.Wherein, described forward solenoid 232 and reverse solenoid 233 are respectively arranged in aluminum matter In circulating line 231 and by ECU1 control, both are connected with electric current in opposite direction so that forward solenoid 232 and reverse helical Pipe 233 adjacent produces like pole.Described irony magnetic conduction cap 234 is arranged on the inwall of aluminium ring shape pipeline 231, and it is positioned at Forward solenoid 232 and reverse solenoid 233 adjacent and forward solenoid 232 and the centre of reverse solenoid 233 axis Point.

The design principle of described homopolarity adjacent type absorbing ring is as follows: energising forward solenoid 232, reverse solenoid 233, phase Adjacent forward solenoid 232, reverse solenoid 233 are connected with electric current in opposite direction so that forward solenoid 232, reverse helical Pipe 233 adjacent produces like pole；Meanwhile, aluminium ring shape pipeline 231 can improve magnetic circuit, strengthens the magnetic field at inner-walls of duct Intensity, strengthens the irony magnetic conduction cap 234 capture absorbability to granule.Each forward solenoid 232, reverse solenoid 233 electric current Directly controlled by ECU1, can be different with concentration and change, to obtain optimal adsorption performance according to the size of granule.

Further, the homopolarity adjacent type absorbing ring that described magnetic suck module 23 may be used without charged hammer, this band shocks by electricity The homopolarity adjacent type absorbing ring of hammer is by aluminium ring shape pipeline 231, forward solenoid 232, reverse solenoid 233, irony magnetic conduction cap 234, dividing plate 235, the parts such as hammer 236 and electric magnet 237 that shock by electricity form.Wherein, described forward solenoid 232 and reverse helical Pipe 233 is respectively arranged in aluminium ring shape pipeline 231 and by ECU1 control, and both are connected with electric current in opposite direction so that forward Solenoid 232 and reverse solenoid 233 adjacent produce like pole.Described irony magnetic conduction cap 234 is arranged in aluminium ring shape pipe On the inwall in road 231, it is positioned at forward solenoid 232 and reverse solenoid 233 adjacent and forward solenoid 232 and anti- Intermediate point to solenoid 233 axis.Described electric shock hammer 236 and electric magnet 237 are between dividing plate 235.Described electric magnet 237 Connect and electric shock hammer 236 can be promoted, making electric shock hammer 236 percussion aluminium ring shape pipeline 232 inwall.Described ECU1 is electrically connected with and controls Forward solenoid 232 processed, reverse solenoid 233 and electric magnet 237.

The design principle of the homopolarity adjacent type absorbing ring of described charged hammer is as follows: energising forward solenoid 232, reverse spiral shell Spool 233, adjacent forward solenoid 232, reverse solenoid 233 are connected with electric current in opposite direction so that forward solenoid 232, reverse solenoid 233 adjacent produces like pole；Meanwhile, aluminium ring shape pipeline 231 can improve magnetic circuit, strengthens pipeline Magnetic field intensity at inwall, strengthens the irony magnetic conduction cap 234 capture absorbability to granule.Each forward solenoid 232, reverse spiral shell Spool 233 electric current is directly controlled by ECU1, can be different with concentration and change, to obtain optimal adsorption according to the size of granule Performance.And by the setting of electric shock hammer 236, prevent granule bulk deposition at irony magnetic conduction cap 234, affect adsorption effect.This Time, controlled the inwall of electric shock hammer 236 percussion pipeline 231 by electric magnet 237 so that adsorbed granule scatter to both sides. Meanwhile, when cleaning pipeline 231, the percussion of electric shock hammer 236 can also improve cleaning performance.

After described magnetic suck module 23 has been adsorbed, ECU1 controls electric magnet power-off, and paramagnetism aluminum matter pipeline loses magnetism, It is attached to magnetic polymeric bulky grain on inner-walls of duct will be disengaged from tube wall and enter electrification module 24 with fluid along tube wall with low speed.

Described electrification module 24 makes the non-ferromagnetic metal wear particle in hydraulic oil charged, its by some electrodes 241 with And one electrode controller 242 form.Described some electrodes 241 are installed on fluid pressure line 7, and it is respectively connecting to electrode controller 242.Described electrode controller 242 is electrically connected with and applies voltage to electrode 241, makes the particulate matter in fluid charged.

Non-ferromagnetic metal wear particle in fluid is adsorbed on tube wall by described electric adsorption module 25, and it is by aluminum matter pipe Road 251, positive plate 252, minus plate 253 and pole plate controller 254 form.Wherein, described positive plate 252, minus plate 253 points It is not arranged on aluminum matter pipeline 251, and in being oppositely arranged；Described positive plate 252, minus plate 253 are respectively and electrically connected to pole plate On controller 254；Described pole plate controller 254 is electrically connected to ECU1, and by ECU1 control.

The operation principle of described electric adsorption module 25 is as follows: charged non-ferromagnetic material metallic wear particles with fluid with speed V flows into electric adsorption module 25 along tube wall, and two electrodes of the negative and positive of electric adsorption module 25 525,253 are controlled by pole plate controller 254 Produce the uniform electric field vertical with speed V direction, then charged corpuscle is subject to be perpendicular to velocity attitude in electric field is centrifuged module The effect of electric field force, makes charged particle do parabolic motion to pole plate under this force, and charged corpuscle is inhaled along the direction of motion Other microgranule attached forms polymeric macroparticle.This parabolic motion specifically refer to charged corpuscle axially follow fluid do straight line fortune Dynamic, radially then do at the uniform velocity or variable motion under electric field force effect, changing electric field intensity by pole plate controller 254 can change Movement velocity, makes charged polymeric bulky grain be adsorbed onto on tube wall.After having adsorbed, when ECU1 controlling plate controller 254 power-off Time, it is attached to magnetic polymeric bulky grain on inner-walls of duct and will be disengaged from tube wall and enter rotation moulding mould with fluid along tube wall with low speed Block 3.

The moulding module of described rotation 3 is for improving the sensitivity of detection.Research shows: the inductance rate of change of cell winding It is directly proportional to the cube of abrasive particle radius.Meanwhile, the form of magnetizing mediums more trends towards elongate, and its demagnetizing factor is the least, magnetization Intensity is the biggest, and magnetizing field field intensity is the biggest.Change on sensor equivalent inductance affects the biggest.The moulding module of this rotation 3 is by aluminum matter A few part groups such as pipeline 31, some windings 32, iron shell 33, flange 34 and the moulding current output module of some rotations 35 Become.Wherein, described some windings 32 are rotating around outside aluminum matter pipeline 31；Described iron shell 33 is coated on aluminum matter pipeline 31； Described flange 34 is welded on the two ends of aluminum matter pipeline 31；The moulding current output module of each rotation 35 is connected to a winding 32.

The design principle of the moulding module of described rotation 3 is as follows: polymeric macroparticle enters with fluid after rotating moulding module 3, ECU1 controls to rotate moulding current output module 35, makes to flow through three-phase symmetrical electric current in the moulding current output module of rotation 35, should Electric current produces rotating excitation field in aluminum matter pipeline 31.Magnetized particles is acted on by magnetic field force under rotating excitation field effect, and Spirally advancing under the effect of this power, magnetic microparticles defines a lot of acicular texture along magnetic line of force direction, these acicular textures Magnetic field will be followed spin motion when magnetic field rotating, and specifically move along a straight line axially following fluid, radially then follow rotation Turn magnetic field to spin motion.Adjust three-phase symmetrical electric current and can change speed and the track of screw.Needle-like knot when motion When metal particle on structure and movement locus meets with, it is combined with one another to bulky grain polymer.By rotating moulding module 3, make oil The particle diameter of the metal particle in liquid increases form simultaneously and becomes elongated acicular texture so that the fiber number of metal particle increases the most greatly Add, further enhancing the sensitivity of Double-coil type detection.

Metallic wear particles is non-uniform Distribution in oil circuit, and variations in flow patterns is sufficiently complex, when particle size and material become During change, its changes of magnetic field caused is the faintest, if detection Magnetic field inhomogeneity will cause serious measurement error, makes detection spirit Sensitivity reduces；Requiring that the characteristic of excitation coil I and excitation coil II is completely the same, this is usually extremely difficult to simultaneously, for this The excitation coil I and excitation coil II needing design has the function of on-line automatic regulation.Specifically, described excitation coil I4 All comprising some windings with excitation coil II6, each winding is made up of positive winding 41 and inverse winding 42, and each winding is respectively connecting to one Exciting current output module 43.This exciting current output module 43 is by ECU1 control, and its digital potentiometer used is AD5206, There is the output of 6 passages, can and ECU1 between realize single bus data transmission.ECU1 is realized magnetization winding by monobus The current settings of polylith exciting current output module 73 and output.Amplifier AD8601 and metal-oxide-semiconductor 2N7002 are real by negative feedback Show the output of high-precision voltage follow.Constant High-current output have employed the high voltage of Texas Instrument (TI), the fortune of big electric current Put OPA 549.

The operation principle of described detection coil 7 is as follows: in order to produce the magnetic field in same polarity direction and make up breach and make simultaneously The magnetic field become is unbalanced, and positive winding 41 is identical with the current characteristics in inverse winding 42, arranges on the axis direction of conduit under fluid pressure 7 There is multipair forward and reverse winding, control electric current by different exciting current output modules 43, it is possible to form the uniform magnetic of system requirements ?.

Because the abrasive particle in liquid is the least, the impact on former magnetic field is the least, and the flux change amount i.e. produced is the least, The sensitivity high in order to ensure sensor, needs to obtain big induction electromotive force in induction coil.According to Faradic electricity magnetic strength Answering law, the size of induced electromotive force and being directly proportional by the rate of change of the magnetic flux of conductor circuit, its direction depends on magnetic field Direction and situation of change.When magnetic flux change is less, big to make its rate of change, its approach has two kinds: one to be to increase former line The number of turn of circle, but sensor bulk so can be caused excessive, inadvisable；One be former magnetic field magnetic flux be zero, be i.e. in zero magnetic field In.Based on this, three groups of coils of the employing of the sensor of this design.Excitation coil I4 and excitation coil II6 is handed over by high frequency Stream power drives, two coil differential concatenations, the magnetic direction of generation is contrary, and described induction coil 5 be positioned at excitation coil I4 and Central authorities between excitation coil II6, can make magnetic field at induction coil 5 cancel out each other, be zero magnetic field.Induction coil 5 and ECU Connect.When in fluid by there being metal bulky grain, cause disturbance of magnetic field, cause induction coil 5 to produce induction electromotive force, utilize Ferromagnetics and the non-ferromagnetic material metal particle otherwise impact to former magnetic field, cause phase of output signal contrary, can distinguish in fluid Wear particle type；Magnetic media grain is the biggest, and fiber number is the biggest, and the biggest on magnetic field impact, the amplitude of output signal is the biggest, detection Sensitivity is the highest.

The concrete grammar using above-mentioned supervising device to be monitored hydraulic oil is as follows:

1), the fluid in fluid pressure line 7 passes through wave filter 8, the high, medium and low frequency range that wave filter 8 is decayed in hydraulic system Fluctuation pressure, and suppression flowed fluctuation；

2), fluid enters the mechanical centrifugal module 21 separating adsorption module 2 afterwards, makes the wear particle in fluid be polymerized also Realizing initial centrifugation, the polymeric macroparticle making quality bigger gets rid of to near-wall；

3), make ferromagnetic metal polymeric macroparticle force-magnetized by magnetized module 22；

4), magnetic suck module 23 adsorbs the big microgranule of magnetized metal polymerization；

5), by electrification module 24, the non-ferromagnetic metal wear particle charged polymeric in fluid is made；

6), charged particle flows into electric adsorption module 25 with speed v subsequently, and electric adsorption module 25 is controlled to produce and speed by ECU1 The uniform magnetic field that degree v direction is vertical, charged particle is subject to be perpendicular to the Lip river logical sequence of velocity attitude and magnetic direction in segregation apparatus The effect of magnetic force, makes charged particle under this force to aluminum matter vessel wall motion, so that the non-ferromagnetic metal in fluid Wear particle " separates " out from fluid, and absorption is on tube wall.

7), after magnetic suck and electro-adsorption to enough particle concentrations, ECU1 first controls electric adsorption module 25 by electric field side To first reversely, then cancel electric field, then adsorb non-ferromagnetic metal wear particle on tube wall and start to depart from tube wall delay from static Slow-motion enters to rotate moulding module 3, and electric adsorption module 25 the most then recovers original electric field.Meanwhile, ECU1 controls magnetic suck mould Block 23 power-off, paramagnetism aluminum matter pipeline loses magnetism, and is attached to magnetic polymeric bulky grain on inner-walls of duct and will be disengaged from tube wall, electrification The power-off of module 24, ferromagnetic particle flows through electrification module 24 and electric adsorption module 25 with low speed with fluid, enters rotation moulding Module 3.Subsequently, magnetic suck module and the electrification original duty of module recovery.

8), charged nonferromagnetic microgranule and magnetized ferromagnetic particle successively enter and rotate moulding module 3, now ECU1 Controlling to flow through three-phase symmetrical electric current in three-phase symmetric winding, this electric current produces rotating excitation field in aluminum matter pipeline.Magnetized particles exists Being acted on by magnetic field force under rotating excitation field effect, and the most spirally advance, magnetic microparticles is along the magnetic line of force Direction defines a lot of acicular texture, and these acicular textures will be followed magnetic field and be spinned motion when magnetic field rotating, when motion When metal particle in acicular texture and movement locus meets with, it is combined with one another to bulky grain polymer.

9), by rotating moulding module 3, make the particle diameter of the metal particle in fluid increase form simultaneously and become elongated needle-like Structure so that the fiber number of metal particle is also greatly increased, further enhancing the sensitivity of Double-coil type detection.This two class subsequently Microgranule enters excitation coil I4, ECU1 with the state of low speed, high concentration, bulky grain and big fiber number in batches and controls exciting current holding The magnetic field homogeneity of excitation coil I4, simultaneously because the power of test of Ferrous particles is greater than copper by the inductance of same model The power of test of granule, need ECU1 regulation exciting current to compensate this difference, with keep output concordance.

10), excitation coil I4 and excitation coil II6 is driven by high-frequency ac power, two coil differential concatenations, the magnetic of generation Field direction is contrary, is positioned at magnetic field at the induction coil 5 of both central authorities and cancels out each other, when in fluid by there being metal bulky grain, Cause disturbance of magnetic field, cause induction coil 5 to produce significant induction electromotive force.Utilize ferromagnetics and non-ferromagnetic material metal particle pair The otherwise impact in former magnetic field, causes phase of output signal contrary, can distinguish wear particle type in fluid, and induction electromotive force Power may determine that the quantity of abraded metal particle, thus realizes that signal conformance is good, reliability is high, detection signal is strong and error Little contactless detection of particulates.

Above detailed description of the invention is only the preferred embodiment of this creation, not in order to limit this creation, all in this wound Any modification, equivalent substitution and improvement etc. done within the spirit made and principle, should be included in this creation protection domain it In.

Claims (10)

1. employing presses down a double excitation solenoid type microgranule sensor for ripple, and it is arranged on fluid pressure line, it is characterised in that: Including wave filter, separate adsorption module, rotate moulding module, excitation coil I, excitation coil II, induction coil and ECU；Its In, described wave filter, separate adsorption module, rotate moulding module, excitation coil I, induction coil, excitation coil II set gradually On fluid pressure line；Described excitation coil I and excitation coil II differential concatenation；Described induction coil is positioned at excitation coil I and swashs Encourage the central authorities between coil II；Described ECU be electrically connected with and control wave filter, separate adsorption module, rotate moulding module, Excitation coil I, excitation coil II and induction coil；Described wave filter includes input pipe, shell, outlet tube, elastic thin-wall, H type Wave filter and cascaded H mode filter；Wherein, described input pipe is connected to one end of shell, and it extends in shell, itself and one Hydraulic oil inlet is docked；Described outlet tube is connected to the other end of shell, and it extends in shell, itself and U-shaped separation of particles mould Block docks；Described elastic thin-wall is installed in shell along the radial direction of shell；The common shape of described input pipe, outlet tube and elastic thin-wall Become a two-tube slip-on filter；Some taper structure changes damping holes are uniformly had in the axial direction of described elastic thin-wall；Described cone Deformation structure damping hole is made up of cone shaped elastic damping hole pipe and slot apertures；Resonance series is formed between described elastic thin-wall and shell Cavity volume I and parallel resonance cavity volume；The outside of described resonance series cavity volume I sets a resonance series cavity volume II, described resonance series Insert pipe by a taper between cavity volume I and resonance series cavity volume II to connect；This taper inserts pipe near input tube side；Described H Mode filter is positioned at parallel resonance cavity volume, and it is connected with taper structure changes damping hole；Described cascaded H mode filter is positioned at string Allying the communists and shake in cavity volume I and resonance series cavity volume II, it is also connected with taper structure changes damping hole；Described H mode filter and string Connection H mode filter is axially symmetrical set, and forms connection in series-parallel H mode filter；Described separation adsorption module is by being sequentially connected with Mechanical centrifugal module, magnetized module, magnetic suck module, electrification module and electric adsorption module composition.

2. employing as claimed in claim 1 presses down the double excitation solenoid type microgranule sensor of ripple, it is characterised in that: described defeated Enter the axis of pipe and outlet tube the most on the same axis；The wider place of described taper structure changes damping hole opening is positioned at resonance series and holds In chamber I and parallel resonance cavity volume, its taper angle is 10 °；The Young of described taper structure changes damping hole cone shaped elastic damping hole pipe The Young's modulus of modular ratio elastic thin-wall wants big, can be with change in fluid pressure stretching or compression；The Young's modulus of slot apertures compares taper The Young's modulus of elastic damping hole pipe wants big, can be with fluid opened by pressure or closedown；Position, tube opening wider place is inserted in described taper In resonance series cavity volume II, its taper angle is 10 °.

3. employing as claimed in claim 1 presses down the double excitation solenoid type microgranule sensor of ripple, it is characterised in that: described machine Tool is centrifuged module and uses eddy flow to be centrifuged module；Described eddy flow is centrifuged module and includes eddy flow tube wall, the first flow deflector, the second water conservancy diversion Sheet, motor and flow transducer；Wherein, described first flow deflector is provided with 3, and these 3 first flow deflectors are along tube wall Circumference is uniformly distributed every 120 °, and its laying angle is set to 18 °；Described second flow deflector and the first flow deflector structure are identical, and it is arranged After the first flow deflector, and and the first flow deflector stagger 60 ° and be connected in tube wall, its laying angle is set to 36 DEG C；Described first leads The long limit of flow is connected with tube wall, and minor face extends along the axis of tube wall；Its leading edge frustrates into obtuse, and trailing edge is processed into wing, and it is high Degree is 0.4 times of tube wall diameter, 1.8 times of a length of tube wall diameter；Described motor connect and drive the first flow deflector and Second flow deflector, to regulate laying angle；Described flow transducer is arranged on the central authorities in tube wall.

4. employing as claimed in claim 1 presses down the double excitation solenoid type microgranule sensor of ripple, it is characterised in that: described magnetic Change module and include aluminum matter pipeline, some windings, iron shell and flange；Wherein, described some windings are rotating around at aluminum matter pipe Outside road；Described iron shell is coated on aluminum matter pipeline；Described flange welding is at the two ends of aluminum matter pipeline.

5. employing as claimed in claim 1 presses down the double excitation solenoid type microgranule sensor of ripple, it is characterised in that: described magnetic Adsorption module uses homopolarity adjacent type absorbing ring, and this homopolarity adjacent type absorbing ring includes aluminium ring shape pipeline, forward solenoid, anti- To solenoid and irony magnetic conduction cap；Described forward solenoid and reverse solenoid are respectively arranged in aluminium ring shape pipeline, and two Person is connected with electric current in opposite direction so that forward solenoid and reverse solenoid adjacent produce like pole；Described irony is led Magnetic cap is arranged on the inwall of aluminium ring shape pipeline, and it is positioned at forward solenoid and reverse solenoid adjacent and forward spiral shell Spool and the intermediate point of reverse solenoid axis.

6. employing as claimed in claim 1 presses down the double excitation solenoid type microgranule sensor of ripple, it is characterised in that: described magnetic Adsorption module uses the homopolarity adjacent type absorbing ring of charged hammer, and the homopolarity adjacent type absorbing ring of this charged hammer includes aluminium ring Shape pipeline, forward solenoid, reverse solenoid, irony magnetic conduction cap, dividing plate, electric shock hammer and electric magnet；Described forward solenoid Being respectively arranged in aluminium ring shape pipeline with reverse solenoid, both are connected with electric current in opposite direction so that forward solenoid and Reverse solenoid adjacent produces like pole；Described irony magnetic conduction cap is arranged on the inwall of aluminium ring shape pipeline, and it is positioned at Forward solenoid and reverse solenoid adjacent and forward solenoid and the intermediate point of reverse solenoid axis；Described dividing plate Between forward solenoid and reverse solenoid；Described electric shock hammer and electric magnet are between dividing plate；Described electric magnet connects And electric shock hammer can be promoted, make electric shock hammer tap aluminium ring shape inner-walls of duct.

7. employing as claimed in claim 1 presses down the double excitation solenoid type microgranule sensor of ripple, it is characterised in that: described Electricity module includes some electrodes and an electrode controller；Described some electrodes are installed on fluid pressure line, and it is respectively connecting to Electrode controller.

8. employing as claimed in claim 1 presses down the double excitation solenoid type microgranule sensor of ripple, it is characterised in that: described electricity Adsorption module includes aluminum matter pipeline, positive plate, minus plate and pole plate controller；Wherein, described positive plate, minus plate set respectively Put on aluminum matter pipeline, and in being oppositely arranged；Described positive plate, minus plate are respectively and electrically connected on pole plate controller；Described Pole plate controller is electrically connected to ECU, and by ECU control.

9. employing as claimed in claim 1 presses down the double excitation solenoid type microgranule sensor of ripple, it is characterised in that: described rotation Turn moulding module and include aluminum matter pipeline, some windings, iron shell, flange and the moulding current output module of some rotations；Its In, described some windings are rotating around outside aluminum matter pipeline；Described iron shell is coated on aluminum matter pipeline；Described flange welding exists The two ends of aluminum matter pipeline；The moulding current output module of each rotation is connected to a winding.

10. employing as claimed in claim 1 presses down the double excitation solenoid type microgranule sensor of ripple, it is characterised in that: described Excitation coil I and excitation coil II all comprises some windings, and each winding is made up of positive winding and inverse winding, and each winding connects respectively To an exciting current output module, this exciting current output module is controlled by ECU module.