CN105973778A - Variable structure working condition-adaptive filtration-based double-exciting solenoid particle sensing method - Google Patents

Abstract

The invention relates to a variable structure working condition-adaptive filtration-based double-exciting solenoid particle sensing method. A variable structure working condition-adaptive filter is adopted to attenuate the pressure/flow pulsation of hydraulic oil; ferromagnetic particles and non-ferromagnetic particles are separated to prevent influence of interference between the two sorts of particles on a detection result by virtue of technologies such as mechanical centrifugation, magnetization adsorption and electrification adsorption; particle aggregation and rotating magnetic field shaping are implemented to increase the particle sizes of the particles and change the forms of the particles to improve detection sensitivity; the solenoid coil structures are improved to regulate the axial uniformity of magnetic induction intensity in solenoids to reduce detection errors; two exciting coils are reversely connected in series to cancel magnetic fields at an induction coil between the exciting coils to form a zero magnetic field, so as to ensure that high magnetic flux change rate can be achieved when magnetic flux changes are small, the detection sensitivity can be improved, and the requirement of a subsequent signal processing circuit is lowered.

Description

With the double excitation solenoid type microgranule sensitive method of structure changes operating mode adaptive-filtering

[technical field]

The present invention relates to a kind of hydraulic oil wear particle sensitive method, be specifically related to one structure changes work The double excitation solenoid type microgranule sensitive method of condition adaptive-filtering, belongs to technical field of hydraulic equipment.

[background technology]

Abrasion is one of principal element that component of machine lost efficacy, wear particle be monitoring wear process with And the most directly information word of diagnosis wear out failure type.Statistics both domestic and external show, hydraulic pressure Mechnisiam 0% fault is derived from the particle contamination of fluid.Therefore, the metallic wear particles in fluid is carried out On-line monitoring has become one of important channel reducing abrasion and hydraulic system clamping jam faults.

Inductance type transducer belongs to non-contact measurement, the material of contained metallic wear particles in fluid Make sensor equivalent inductance change with quantity, thus realize the on-line monitoring of wear particle.China Patent of invention the 201310228772.6th discloses a kind of fluid metal worn particle on-line monitoring system, should Fluid metal worn particle on-line monitoring system includes sensor, microprocessor and circuit, and its sensor is spiral shell Spool formula inductance sensor.When using this system to carry out on-line monitoring, first by two identical sensings The excitation coil parallel connection of device accesses excitation AC signal generator, by two induction coil differential concatenations also It is connected into AC bridge with the big resistance of the resistances such as two；Then the oil of a fluid sensor from which is made Road is passed through.When sensor containing an oil circuit of excitation coil and induction coil by containing metal The fluid of abrasive particle and another is obstructed out-of-date, metal worn particle affects the magnetic field intensity of sensor, destroys electricity The balance of bridge, the alternating voltage of induction coil output respective magnitudes.Output voltage size and metal worn particle Concentration is 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 fluid metal worn particle concentration is supervised online The purpose surveyed.

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, detects coil Output result affected relatively big by microgranule Negotiation speed, in pipeline, pressure and the flowed fluctuation of fluid will be tight Ghost image rings effectiveness and the concordance of inductance method detection of particulates.

2. the galling abrasive particle in machine oil can be divided into ferromagnetics microgranule according to its electromagnetic property (such as ferrum) and non-ferromagnetic material microgranule (such as copper, aluminum).Ferromagnetics microgranule strengthens the equivalence of cell winding Inductance, non-ferromagnetic material microgranule then weakens the equivalent inductance of cell winding.When two kinds of microgranules lead to simultaneously When crossing 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 Abrasive particle, its fiber number is less than other abrasive particles, and cell winding is relatively weak to its power of test.Such as patent Document 1 can only process the metal particle of about 10um, 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 error；The power of test of Ferrous particles is greater than copper by the inductance of the most same model The power of test of matter granule, this can bring measurement error equally.

Therefore, for solve above-mentioned technical problem, a kind of innovation of necessary offer use structure changes operating mode The double excitation solenoid type microgranule sensitive method of adaptive-filtering, of the prior art described scarce to overcome Fall into.

[summary of the invention]

For solving above-mentioned technical problem, it is an object of the invention to provide the non-contacting measurement of a kind of employing The use structure changes operating mode that mode, signal conformance are good, reliability is high, detection signal is strong and error is little is certainly The double excitation solenoid type microgranule sensitive method of adaptive filtering.

For achieving the above object, the technical scheme that the present invention takes is: filter by structure changes operating mode self adaptation The double excitation solenoid type microgranule sensitive method of ripple, it uses a kind of sensor, and this device is arranged on On fluid pressure line, including wave filter, separate adsorption module, rotate moulding module, excitation coil I, Excitation coil II, induction coil and ECU；Wherein, described wave filter, separation adsorption module, rotation Turn moulding module, excitation coil I, induction coil, excitation coil II are successively set on fluid pressure line； Described excitation coil I and excitation coil II differential concatenation；Described induction coil be positioned at excitation coil I and Central authorities between excitation coil II；Described ECU is electrically connected with and controls wave filter, separates and inhale Attached module, rotate moulding module, excitation coil I, excitation coil II and induction coil；Described filtering Device includes input pipe, shell, outlet tube, S type elastic thin-wall, plug-in type H mode filter, insertion Formula cascaded H mode filter and colloid damping layer；Wherein, described input pipe is connected to one end of shell； Described outlet tube is connected to the other end of shell；Described S type elastic thin-wall is installed on along the radial direction of shell In shell, in it, form expansion chamber and contraction chamber；Described input pipe, outlet tube and S type elastic thin-wall It is collectively forming a S type cavity volume wave filter；Resonance series is formed between described S type elastic thin-wall and shell Cavity volume I, resonance series cavity volume II and parallel resonance cavity volume；Described resonance series cavity volume I and series connection Separated by an elastic baffle between resonance cavity volume II；Uniformly open in the axial direction of described S type elastic thin-wall There are some conical damping holes；Uniformly have some tapers in the axial direction of described elastic baffle and insert pipe, institute State taper and insert pipe connection resonance series cavity volume I and resonance series cavity volume II；Described plug-in type H type is filtered Ripple device is positioned at parallel resonance cavity volume, and it is connected with conical damping hole；Described plug-in type cascaded H type Wave filter is positioned at resonance series cavity volume I and resonance series cavity volume II, and it is also connected with conical damping hole Logical；Described plug-in type H mode filter and plug-in type cascaded H mode filter are axially symmetrical set, and Composition plug-in type connection in series-parallel H mode filter；Described colloid damping layer is arranged on the interior of S type elastic thin-wall Side；Described separation adsorption module is by the mechanical centrifugal module being sequentially connected with, magnetized module, magnetic suck mould Block, electrification module and electric adsorption module composition；It comprises the steps:

1), the fluid in fluid pressure line passes through wave filter, height in filter attenuation hydraulic system, in, The fluctuation pressure of low-frequency range, and suppression flowed fluctuation；

2), fluid enters the mechanical centrifugal module separating adsorption module afterwards, makes the abrasion in fluid Grain polymerization also realizes initial centrifugation, and the polymeric macroparticle making quality bigger gets rid of to near-wall；

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

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

5), fluid passes through electric ignitor, makes the non-ferromagnetic metal wear particle charged polymeric in fluid；

6), fluid flows into electric adsorption module, electric adsorption module absorption non-ferromagnetic metal wear particle；

7), ECU first controls electric adsorption module by direction of an electric field the most reversely, then cancels electric field, makes non-ferric Magnetic metal wear particle enters and rotates moulding module, recovers electric field afterwards；Meanwhile, ECU controls magnetic Adsorption module and the power-off of electrification module, ferromagnetic particle enters and rotates moulding module；Subsequently, magnetic Attached module and the electrification original duty of module recovery；

8), charged nonferromagnetic microgranule and magnetized ferromagnetic particle successively enter and rotate moulding mould Block, makes the particle diameter of in fluid two kinds of metal particles increase form simultaneously and becomes elongated acicular texture, make The fiber number obtaining metal particle is also greatly increased；

9), produce magnetic field in opposite direction by excitation coil I and excitation coil II, be positioned in both At the induction coil of centre, cancel out each other in magnetic field；Two based fine particles enter induction coil in batches, cause the line of induction Circle produces induction electromotive force, thus judges type and the quantity of wear particle.

The double excitation solenoid type microgranule sensitive method using structure changes operating mode adaptive-filtering of the present invention It is further: the axis of described input pipe and outlet tube is the most on the same axis；Described conical damping hole The wider place of opening is positioned at resonance series cavity volume I and parallel resonance cavity volume, and its taper angle is 10 °；Institute Stating the taper insertion wider place of tube opening and be positioned at resonance series cavity volume II, its taper angle is 10 °；Described Taper is inserted the position of pipe and conical damping hole and is mutually staggered；The internal layer of described colloid damping layer and outer layer It is respectively outer layer S type elastic thin-wall and internal layer S type elastic thin-wall, outer layer S type elastic thin-wall and internal layer Connected by some pillars are fixing between S type elastic thin-wall；Described outer layer S type elastic thin-wall and internal layer S It is filled with the pure water adding antifreezing agent in interlayer between type elastic thin-wall, in pure water, is suspended with porous Silica gel；Described colloid damping layer is connected with shell near one end of outlet tube；Described colloid damping layer leans on One end of nearly input pipe is provided with circular piston, is tightly connected between piston and colloid damping layer.

The double excitation solenoid type microgranule sensitive method using structure changes operating mode adaptive-filtering of the present invention It is further: 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, motor and flow transducer；Wherein, Described first flow deflector is provided with 3, and these 3 first flow deflectors are along tube wall inner periphery every 120 ° uniformly Distribution, its laying angle is set to 18 °；Described second flow deflector and the first flow deflector structure are identical, and it sets Put after the first flow deflector, and and the first flow deflector stagger 60 ° and be connected in tube wall, its laying angle sets It it is 36 DEG C；The long limit of described first flow deflector 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 0.4 times of tube wall diameter, a length of pipe 1.8 times of wall diameter；Described motor connects and drives the first flow deflector and the second flow deflector, with Regulation laying angle；Described flow transducer is arranged on the central authorities in tube wall.

The double excitation solenoid type microgranule sensitive method using structure changes operating mode adaptive-filtering of the present invention It is further: described magnetized module includes aluminum matter pipeline, some windings, iron shell and flange； Wherein, described some windings are rotating around outside aluminum matter pipeline；Described iron shell is coated on aluminum matter pipeline On；Described flange welding is at the two ends of aluminum matter pipeline.

The double excitation solenoid type microgranule sensitive method using structure changes operating mode adaptive-filtering of the present invention It is further: described magnetic suck module uses homopolarity adjacent type absorbing ring, this homopolarity adjacent type absorbing ring Including aluminium ring shape pipeline, forward solenoid, reverse solenoid and irony magnetic conduction cap；Described forward Solenoid and reverse solenoid are respectively arranged in aluminium ring shape pipeline, and both are connected with electricity in opposite direction Stream so that forward solenoid and reverse solenoid adjacent produce like pole；Described irony magnetic conduction cap Be arranged 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 double excitation solenoid type microgranule sensitive method using structure changes operating mode adaptive-filtering of the present invention Being further: described magnetic suck module uses the homopolarity adjacent type absorbing ring of charged hammer, this band shocks by electricity The homopolarity adjacent type absorbing ring of hammer includes aluminium ring shape pipeline, forward solenoid, reverse solenoid, ferrum Matter magnetic conduction cap, dividing plate, electric shock hammer and electric magnet；Described forward solenoid and reverse solenoid are respectively Being arranged in aluminium ring shape pipeline, both are connected with electric current in opposite direction so that forward solenoid is with anti- Like pole is produced to solenoid adjacent；Described irony magnetic conduction cap is arranged in the interior of aluminium ring shape pipeline On wall, it is positioned at forward solenoid and reverse solenoid adjacent and forward solenoid and reverse spiral shell The intermediate point of spool axis；Described dividing plate is between forward solenoid and reverse solenoid；Described electricity Hammer and electric magnet are between dividing plate；Described electric magnet connects and can promote electric shock hammer, makes electric shock hammer into shape Tap aluminium ring shape inner-walls of duct.

The double excitation solenoid type microgranule sensitive method using structure changes operating mode adaptive-filtering of the present invention It is further: described electrification module includes some electrodes and an electrode controller；Described some electrodes Being installed on fluid pressure line, it is respectively connecting to electrode controller.

The double excitation solenoid type microgranule sensitive method using structure changes operating mode adaptive-filtering of the present invention It is further: described electric adsorption module includes that aluminum matter pipeline, positive plate, minus plate and pole plate control Device；Wherein, described positive plate, minus plate are separately positioned 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 electrical It is connected to ECU, and by ECU control.

The double excitation solenoid type microgranule sensitive method using structure changes operating mode adaptive-filtering of the present invention It is further: the moulding module of described rotation includes aluminum matter pipeline, some windings, iron shell, flange And some moulding current output module of rotation；Wherein, described some windings are rotating around at aluminum matter pipeline Outward；Described iron shell is coated on aluminum matter pipeline；Described flange welding is at the two ends of aluminum matter pipeline； The moulding current output module of each rotation is connected to a winding.

The double excitation solenoid type microgranule sensitive method using structure changes operating mode adaptive-filtering of the present invention Be also: described excitation coil I and excitation coil II all comprises some windings, each winding by positive winding and Inverse winding forms, and each winding is respectively connecting to an exciting current output module, this exciting current output mould Block is by ECU control.

Compared with prior art, there is advantages that and present invention introduces oil liquid pressure stream Amount fluctuation suppression technology and microgranule timesharing release measure, to ensure effectiveness and the concordance of detection；Logical Ferromagnetics microgranule and non-ferromagnetic material microgranule are divided by the technology such as mechanical centrifugal, magnetization absorption, an electro-adsorption of crossing From, affect testing result preventing two kinds of microgranules from interfering with each other；Moulded by aggregation of particles and rotating excitation field Shape increases grain diameter and changes its form, to improve the sensitivity of detection；By improving line solenoid Coil structures adjusts the uniformity along its axis direction of the magnetic induction in solenoid, to reduce detection by mistake Difference；Construct zero magnetic field, the outside field coil differential concatenation (bidifly that two are driven by high-frequency ac power Encourage solenoid), the magnetic direction of generation is contrary, can make to be placed exactly in central sensory line at tube interior At circle, cancel out each other in magnetic field, is zero magnetic field, it is ensured that can obtain the biggest when magnetic flux change is less Variation rate of magnetic flux, to improve detection sensitivity, reduces follow-up signal and processes circuit requirement.

[accompanying drawing explanation]

Fig. 1 is the sensitive with the double excitation solenoid type microgranule of structure changes operating mode adaptive-filtering of the present invention The overall structure schematic diagram of device.

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 plug-in type H mode filter schematic diagram in Fig. 3.

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

Fig. 6 is plug-in type H mode filter and plug-in type cascaded H mode filter frequency characteristic constitutional diagram. Wherein, solid line is plug-in type cascaded H mode filter frequency characteristic.

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

Fig. 8 is the structural representation of S type cavity volume wave filter.

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

Figure 10 is the Longitudinal cross section schematic of colloid damping layer.

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 knot of the adjacent type absorbing ring of the homopolarity that magnetic suck module is charged hammer in Figure 11 Structure schematic diagram.

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 in Fig. 1.

[detailed description of the invention]

Refer to shown in Figure of description 1 to accompanying drawing 19, the present invention be one structure changes operating mode from The double excitation solenoid type microgranule sensor of adaptive filtering, it is arranged on fluid pressure line 7, its by Wave filter 8, separate adsorption module 2, rotate moulding module 3, excitation coil I4, induction coil 5, Several parts compositions such as excitation coil II6 and ECU1.

Wherein, described wave filter 8, separate adsorption module 2, rotate moulding module 3, excitation coil I4, Induction coil 5, excitation coil II6 are successively set on fluid pressure line 7.Described ECU1 is the most electrically Connect and control wave filter 8, separate adsorption module 2, rotate moulding module 3, excitation coil I4, swash Encourage 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, detection Sensitivity and output voltage all will occur significant change；Meanwhile, the flow of fluid is also to detection output Having large effect, when flow increases, output voltage is as well as change, and this is to testing result Concordance and availability influence are very big, to this end, the present invention adds wave filter 8 stabilizing solution before detection Pressure system pressure and flow.

Described wave filter 8 by input pipe 81, shell 89, outlet tube 811, S type elastic thin-wall 87, Several parts compositions such as plug-in type H mode filter 812 and plug-in type cascaded H mode filter 813.

Wherein, described input pipe 81 is connected to one end of shell 89, is used for inputting fluid；Described defeated Going out pipe 811 and be connected to the other end of shell 89, itself and separation adsorption module 2 dock.Described Thin Elastic Wall 87 is installed in shell 89 along the radial direction of shell, forms expansion chamber 71 and contraction chamber 72 in it. The axis of described input pipe 81 and outlet tube 811 the most on the same axis, so can improve 10% Above filter effect.

Described input pipe 81, outlet tube 811 and S type elastic thin-wall 87 are collectively forming a S type cavity volume Wave filter, thus hydraulic system high frequency pressure pulsations of decaying.The filter obtained after processing by lumped-parameter method Ripple device transmission coefficient is:

$\mathrm{\γ}=\frac{1}{1+{(\frac{2\mathrm{\π}f}{Z}\·\frac{\frac{2}{3}{k}_1{D}^3+k_2{d}^{2}L}{{d_I}^2\·a})}^2}$

Velocity of sound L contraction chamber length D expansion chamber diameter Z characteristic resistance in a medium Anti-

γ transmission coefficient f pressure oscillation frequency d_IInput pipe diameter d contraction chamber Diameter

k₁Expansion chamber coefficient k₂Contraction chamber coefficient

From above formula, the class ∏ type resistance wave filter of S type cavity volume is similar with the electric capacity effect in circuit. When the pressure pulse wave of different frequency is by this wave filter, transmission coefficient is different with frequency.Frequency is more Height, then transmission coefficient is the least, and this shows that the pressure pulse wave of high frequency is decayed more when device after filtering Severity, thus serve the effect eliminating high frequency pressure pulsations.Meanwhile, the S type cavity volume knot of the present invention In structure, transitions smooth between expansion chamber and contraction chamber, contribute to reduce cavity diameter sudden change bring be The system pressure loss.The input pipe of wave filter and outlet tube the most on the same axis, can improve 10% with On filter effect.

The design principle of described S type cavity volume wave filter is as follows: when the flow of change is entered by input pipe During the expansion chamber of S type cavity volume, liquid stream exceedes average discharge, and the expansion chamber of expansion can absorb unnecessary liquid Stream, and when less than average discharge, release liquid stream, thus absorption pressure pulsation energy.Multiple expansion chamber Combination with contraction chamber then improves the fluctuation pressure absorbability of wave filter, namely filtering performance.Swollen Use curved surface to smoothly transit between swollen chamber and contraction chamber, then avoid the edge brought by fluid boundary sudden change Stroke pressure loss and heating.

Described S type elastic thin-wall 87 weakens hydraulic system medium-high frequency pressure by being forced to mechanical vibration Pulsation.The S type elastic thin-wall natural frequency obtained after processing by lumped-parameter method 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 S type elastic thin-walled structures coefficient h S type elastic thin-wall thickness R S type bullet Property thin-walled radius

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

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

Substitute into actual parameter, above formula is carried out simulation analysis it is found that the consolidating of S type elastic thin-wall 87 There is frequency generally high than the natural frequency of H mode filter, and its attenuation band also ratio H mode filter Wide.In relatively wide frequency band range, S type elastic thin-wall has good decay to pressure fluctuation Effect.Meanwhile, the S type 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 effectively declining to the medium-high frequency pressure fluctuation in hydraulic system Subtract.

The design principle of described S type elastic thin-wall 87 is as follows: when producing intermediate frequency pressure fluctuation in pipeline, S type cavity volume is more weak to the damping capacity of pressure oscillation, flows into the periodically pulsing of wave filter S type cavity volume Pressure continuous action is on the inside and outside wall of S type elastic thin-wall, owing to there being pillar fixing even between inside and outside wall Connecing, inside and outside elastic thin-wall does periodic vibration by the frequency of fluctuation pressure simultaneously, and this forced vibration consumes The pressure fluctuation energy of fluid, thus realize the filtering of Mid Frequency pressure.From the principle of virtual work, bullet Property thin-walled potential energy when consuming the ability of fluid pulsation pressure energy and its forced vibration and kinetic energy sum Directly related, in order to improve Mid Frequency filtering performance, the radial design of elastic thin-wall is much larger than pipeline Radius, and the thickness of thin-walled is less, representative value is less than 0.1mm.

Further, between described S type elastic thin-wall 87 and shell 89 formed resonance series cavity volume I84, Resonance series cavity volume II83 and parallel resonance cavity volume 85, described cavity volume 83,84,85 is across whole Wave filter, it is hereby achieved that bigger resonance cavity volume volume, strengthens attenuating.Described series connection is altogether Shake and separated by an elastic baffle 810 between cavity volume I84 and resonance series cavity volume II83.Described S type Uniformly having some conical damping holes 86 in the axial direction of elastic thin-wall 87, described conical damping hole 86 is opened The wider place of mouth is positioned at resonance series cavity volume I84 and parallel resonance cavity volume 85, and its taper angle is 10 °. Uniformly having some tapers in the axial direction of described elastic baffle 810 and insert pipe 82, pipe is inserted in described taper 82 connection resonance series cavity volume I84 and resonance series cavity volume II83.Pipe 82 opening is inserted in described taper Wider place is positioned at resonance series cavity volume II83, and its taper angle is 10 °, and pipe 82 is inserted in described taper Mutually stagger with the position of conical damping hole 86.

Described plug-in type H mode filter 812 is positioned at parallel resonance cavity volume 85, and itself and taper damp Hole 86 is connected.The wave filter natural angular frequency obtained after processing by lumped-parameter method is:

$\begin{array}{cc}{\mathrm{\ω}}_r=a\sqrt{\frac{S}{L(V-LS)}}& (rad/s)\end{array}---\left(1\right)$

Velocity of sound L damping hole long S damping hole cross-sectional area V parallel resonance in a medium Cavity volume volume.

Described plug-in type cascaded H mode filter 813 is positioned at resonance series cavity volume I84 and resonance series is held In the II83 of chamber, it is also connected with conical damping hole 86.After processing by lumped-parameter method, wave filter Two natural angular frequencies be:

${\mathrm{\ω}}_1=\frac{\sqrt{\mathrm{\π}}a}{\sqrt{2}\sqrt{k_1+k_2+\sqrt{{\[k_1-k_2\]}^2+\frac{4{(V_4-\frac{1}{4}{{\mathrm{\πd}}_3}^2{l}_3)}^2{l}_1{l}_3}{d_1^2{d}_3^2}}}}---\left(2\right)$

${\mathrm{\ω}}_2=\frac{\sqrt{\mathrm{\π}}a}{\sqrt{2}\sqrt{k_1+k_2-\sqrt{{\[k_1-k_2\]}^2+\frac{4{(V_4-\frac{1}{4}{{\mathrm{\πd}}_3}^2{l}_3)}^2{l}_1{l}_3}{d_1^2{d}_3^2}}}}---\left(3\right)$

Wherein:

$k_1=\frac{l_1(V_2+V_4-\frac{1}{4}{{\mathrm{\πd}}_1}^2{l}_1-\frac{1}{4}{{\mathrm{\πd}}_3}^2{l}_3)}{{d_1}^2}$

$k_2=\frac{(V_4-\frac{1}{4}{{\mathrm{\πd}}_3}^2{l}_3)l_3}{{d_3}^2}$

Velocity of sound l in a medium₁The long d of damping hole₁Damping hole diameter l₃Insert pipe range

d₃Insert pipe diameter V₂Resonance series cavity volume 1 volume V₄Resonance series cavity volume 2 volume.

Described plug-in type H mode filter 812 and plug-in type cascaded H mode filter 813 are the most symmetrically Arrange, and form plug-in type connection in series-parallel H mode filter, for broadening frequency filtering scope and make entirety More compact structure.The multiple plug-in type connection in series-parallel H mode filters of the present invention circumferentially interface distributions (figure In only depict 2), separate with dividing plate 820 each other, the resonance bands of these multiple wave filter Different, whole medium and low frequency filtering frequency range can be covered after combining, it is achieved medium and low frequency section comprehensively Entire spectrum filtering.

By Fig. 6 plug-in type H mode filter and plug-in type cascaded H mode filter frequency characteristic and formula (1) (2) (3) all can find, plug-in type cascaded H mode filter has 2 natural angular frequencies, At crest, filter effect is preferable, does not the most substantially have filter effect at trough；Plug-in type H type filters Device has 1 natural angular frequency, and at crest, filter effect is preferable equally, does not the most substantially have at trough There is filter effect；Select suitable filter parameter, make the natural angular frequency of plug-in type H mode filter Just fall between 2 natural angular frequencies of plug-in type cascaded H mode filter, as it is shown in fig. 7, both The natural reonant frequency peak value of 3 next-door neighbours is defined, in this frequency range in certain frequency range In, no matter the fluctuating frequency of pressure is at crest or all can guarantee that preferable filter effect at trough. The bank of filters that multiple plug-in type connection in series-parallel H mode filters are constituted both can cover whole medium and low frequency section, real The entire spectrum filtering of existing medium and low frequency section.

Further, the inner side of described S type elastic thin-wall 87 is provided with colloid damping layer 88.Described The internal layer of colloid damping layer 88 and outer layer are respectively outer layer S type elastic thin-wall 81 and internal layer S type is elastic Thin-walled 82, by some pillars between outer layer S type elastic thin-wall 81 and internal layer S type elastic thin-wall 82 814 fixing connections.Interlayer between outer layer S type elastic thin-wall 81 and internal layer S type elastic thin-wall 82 Inside it is filled with the pure water 816 adding antifreezing agent, in pure water 816, is suspended with Bio-sil 815.Institute State colloid damping layer 88 to be connected with shell 89 near one end of input pipe 811；Described colloid damping layer 88 are provided with circular piston 817, piston 817 and colloid damping layer 88 near one end of input pipe 811 Between be tightly connected.

Due to outer layer S type elastic thin-wall 81 with internal layer S type elastic thin-wall 82 spacing is the least and by pillar 814 fixing connections, when pressure fluctuation acts perpendicularly to thin-walled, inside and outside wall produces and is close to consistent shape Becoming, colloid damping layer thickness is kept approximately constant, and pressure fluctuation is not had damping action；Colloid damps The flow pulsation in 817 sensation level directions of piston of layer 88, when flow pulsation strengthens, piston 817 Pressurized makes colloid damping layer shrink, and squeezing action makes the water in colloid damping layer 88 defeated by nanoscale Passage is sent to enter micron order central void；When flow pulsation weakens, piston 817 by back-pressure, now glue Body damping layer expands, and the water in colloid damping layer is discharged through passage from central void.In the process, Mechanics effect, the roughness effect of channel surface molecular scale and change due to silica gel 815 microchannel sorption Learning heterogeneous body effect, piston is followed colloid damping layer and is shunk and do " gas-liquid-solid " limit in expansion process The interfactial work on boundary, thus flow systolic implementation is decayed, its substantially parallel R mode filter. This wave filter is relative to the advantage of general liquid condenser: it passes through " gas-liquid-solid " border The mode of interfactial work decay flow pulsation, a large amount of machinery can be absorbed in the case of not producing heat Can, and energy expenditure do not relies on piston speed, extinction efficiency is obviously improved.

The present invention can also the pulsation decay of solid line operating mode self-adaptive pressure.When hydraulic system working conditions change, Both executive component stopped suddenly or ran, and when the opening of valve changes, can cause the spy of pipe-line system Property impedance is undergone mutation, so that former pipeline pressure curve with change in location in time changes the most therewith Become, then the position of pressure peak also changes.Axial length design due to the wave filter of the present invention For pulsing wavelength, and the plug-in type connection in series-parallel H mode filter group of wave filter more than system main pressure Cavity volume length, the length of S type cavity volume wave filter and the length of S type elastic thin-wall 87 and wave filter axis Length is equal, it is ensured that pressure peak position is constantly in the effective range of wave filter；And bore Shape damping hole 86 is opened on S type elastic thin-wall 87, is uniformly distributed in the axial direction, at elastic baffle Pipe 82, conical damping hole 86 He are inserted in the taper uniformly having multiple identical parameters in the axial direction of 810 Taper is inserted pipe 82 position and is mutually staggered 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.Axial in view of three kinds of filter structures Size and wave filter are suitable, and this bigger size also ensure that hydraulic filter possesses stronger pressure Pulsation damping capacity.

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

1), hydraulic fluid enters S type cavity volume wave filter by input pipe, and it is unnecessary that the cavity volume of expansion absorbs Liquid stream, completes the filtering of high frequency pressure pulsations；

2), by S type elastic thin-wall 87 forced vibration, the pressure fluctuation energy of fluid is consumed, complete Become the filtering of intermediate frequency pressure fluctuation；

3), by plug-in type connection in series-parallel H mode filter group, and conical damping hole, taper insertion pipe Produce resonance with fluid, 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 Plug-in type connection in series-parallel H mode filter length, S type cavity volume filter length and S type elastic thin-wall 87 Length is equal with filter length, makes pressure peak position be constantly in the useful effect model of wave filter Enclose, it is achieved the filtering of pressure fluctuation when system condition changes.

Galling abrasive particle in machine oil according to its electromagnetic property can be divided into ferromagnetics microgranule (as Ferrum) and non-ferromagnetic material microgranule (such as copper, aluminum).Ferromagnetics microgranule strengthens the equivalent electric of cell winding Sense, non-ferromagnetic material microgranule then weakens the equivalent inductance of cell winding.When two kinds of microgranules pass through simultaneously During detection coil, this monitoring device will lose efficacy.Separate to this end, the present invention separates adsorption module 2 Both microgranules.Described separation adsorption module 2 is by the mechanical centrifugal module 21 being sequentially connected with, magnetization Block 22, magnetic suck module 23, electrification module 24 and electric adsorption module 25 form.

Wherein, described mechanical centrifugal module 21 makes fluid under the action of the centrifugal, the solid that quality is bigger Granule is thrown toward cavity wall, and it uses the mode of energy loss, and its design principle is as follows: set in the duct Put the flow deflector of the distortion of certain altitude and length, and make blade face tangent line angled with axis, because of Pipe flow border changes and fluid can be made to produce spiral flow in pipes, and this spiral flow can be analyzed to around pipe axle Circumferential flow and axial straight flowing, the particulate matter carried in fluid produces off-axis alignment heart spiral fortune Dynamic.This eddy flow centrifugal device 21 by eddy flow tube wall the 211, first flow deflector the 212, second flow deflector 213, Several parts compositions such as motor 214 and flow transducer 215, described motor 214 and stream Quantity sensor 215 is electrically connected to ECU1.

Wherein, described first flow deflector 212 is provided with 3, and these 3 first flow deflectors 212 are along tube wall 211 inner peripherys are uniformly distributed every 120 °, its laying angle (the first flow deflector 212 and eddy flow tube wall 211 Between angle) be set to 18 °, to ensure optimal tangential flowing.Described second flow deflector 213 and One flow deflector 212 structure is identical, after it is arranged on the first flow deflector 212, and and the first flow deflector 212 Staggering 60 ° and be connected in tube wall 211, its laying angle is set to 36 DEG C, is used for reducing resistance and strengthening week Intensity to flowing.It addition, the 3rd or more water conservancy diversion can be arranged the most again according to actual separation effect Sheet, laying angle gradually increases.Described motor 214 connects and drives the first flow deflector 212 and Two flow deflectors 213, to regulate laying angle, thus can obtain more preferable centrifugal effect, know and make water conservancy diversion Sheet 212,213 adapts to different operating modes.During described flow transducer 215 is arranged in tube wall 211 Centre, the ECU1 numerical analysis cyclonic separation effect by reading flow quantity sensor 215, and control accordingly Motor 214 processed, 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, minor face 213 edge The axis of tube wall 211 extends；For reducing resistance, its leading edge frustrates into obtuse；For avoiding streaming, trailing edge It is processed into wing；Its height is 0.4 times of tube wall 211 diameter, makes the spiral flow of formation have bigger Intensity；1.8 times of a length of tube wall 211 diameter, to ensure the bigger sphere of action to fluid.

Described magnetized module 22 is force-magnetized by the ferromagnetic metal wear particle that carries in fluid, And make micron-sized wear particle aggregate into bulky grain, the output signal strength of sensor can be improved. Described magnetizing assembly 22 is by aluminum matter pipeline 221, some windings 222, iron shell 223 and flange 224 compositions.Wherein, described aluminum matter pipeline 221 makes fluid flow there through and by magnetization treatment, And the pcrmeability of aluminum is the lowest, can make pipeline 221 obtains higher magnetic field intensity.

Described some windings 222 are rotating around outside aluminum matter pipeline 221, by a diameter of about 1.0mm Copper wire coating insullac is made.Described iron shell 223 is coated on aluminum matter pipeline 221, irony Material 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, its Homopolarity adjacent type absorbing ring can be used.This homopolarity adjacent type absorbing ring is by aluminium ring shape pipeline 231, just To parts compositions such as solenoid 232, reverse solenoid 233 and irony magnetic conduction caps 234.Wherein, Described forward solenoid 232 and reverse solenoid 233 are respectively arranged in aluminium ring shape pipeline 231 also By ECU1 control, both are connected with electric current in opposite direction so that forward solenoid 232 and reverse spiral shell Spool 233 adjacent produces like pole.Described irony magnetic conduction cap 234 is arranged in aluminium ring shape pipeline On the inwall of 231, it is positioned at forward solenoid 232 and reverse solenoid 233 adjacent, Yi Jizheng To solenoid 232 and the intermediate point of reverse solenoid 233 axis.

The design principle of described homopolarity adjacent type absorbing ring is as follows: energising forward solenoid 232, reversely Solenoid 233, adjacent forward solenoid 232, reverse solenoid 233 are connected with electricity in opposite direction Stream so that forward solenoid 232, reverse solenoid 233 adjacent produce like pole；Meanwhile, Aluminium ring shape pipeline 231 can improve magnetic circuit, strengthens the magnetic field intensity at inner-walls of duct, strengthens irony The magnetic conduction cap 234 capture absorbability to granule.Each forward solenoid 232, reverse solenoid 233 Electric current is directly controlled by ECU1, can be different with concentration and change, to obtain according to the size of granule Obtain optimal adsorption performance.

Further, the homopolarity adjacent type absorption that described magnetic suck module 23 may be used without charged hammer Ring, the homopolarity adjacent type absorbing ring of this charged hammer by aluminium ring shape pipeline 231, forward solenoid 232, Reverse solenoid 233, irony magnetic conduction cap 234, dividing plate 235, electric shock hammer 236 and electric magnet 237 Form Deng parts.Wherein, described forward solenoid 232 and reverse solenoid 233 are respectively arranged in aluminum In matter circulating line 231 and by ECU1 control, 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 Being arranged on the inwall of aluminium ring shape pipeline 231, it is positioned at forward solenoid 232 and reverse solenoid 233 adjacents and forward solenoid 232 and the intermediate point of reverse solenoid 233 axis.Described Electric shock hammer 236 and electric magnet 237 are between dividing plate 235.Described electric magnet 237 connects and can push away Galvanic electricity hammer 236, makes electric shock hammer 236 percussion aluminium ring shape pipeline 232 inwall.Described ECU1 electricity Property connects and controls forward solenoid 232, 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 solenoid 233, adjacent forward solenoid 232, reverse solenoid 233 are connected with direction Contrary electric current so that forward solenoid 232, reverse solenoid 233 adjacent produce like pole； Meanwhile, aluminium ring shape pipeline 231 can improve magnetic circuit, strengthens the magnetic field intensity at inner-walls of duct, increases The strong irony magnetic conduction cap 234 capture absorbability to granule.Each forward solenoid 232, reverse helical Pipe 233 electric current is directly controlled by ECU1, can be different with concentration and change according to the size of granule, To obtain optimal adsorption performance.And by the setting of electric shock hammer 236, prevent granule at irony magnetic conduction cap Bulk deposition at 234, affects adsorption effect.Now, electric shock hammer 236 is controlled by electric magnet 237 Tap the inwall of pipeline 231 so that adsorbed granule scatter to both sides.Meanwhile, pipe is being cleaned During road 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, paramagnetism aluminum matter Pipeline loses magnetism, be attached to magnetic polymeric bulky grain on inner-walls of duct will be disengaged from tube wall and with low speed with Fluid enters electrification module 24 along tube wall.

Described electrification module 24 makes the non-ferromagnetic metal wear particle in hydraulic oil charged, if its by Dry electrode 241 and an electrode controller 242 form.Described some electrodes 241 are installed on hydraulic tube On road 7, it is respectively connecting to electrode controller 242.Described electrode controller 242 be electrically connected with to Electrode 241 applies voltage, 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, It is made up of aluminum matter pipeline 251, positive plate 252, minus plate 253 and pole plate controller 254. Wherein, described positive plate 252, minus plate 253 are separately positioned on aluminum matter pipeline 251, and in phase To setting；Described positive plate 252, minus plate 253 are respectively and electrically connected on pole plate 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 Electric adsorption module 25, two electricity of the negative and positive of electric adsorption module 25 are flowed into speed V along tube wall with fluid Pole 525,253 is controlled to produce the uniform electric field vertical with speed V direction by pole plate controller 254, Then charged corpuscle is by being perpendicular to acting on of the electric field force of velocity attitude in electric field is centrifuged module, makes band Electricity granule does parabolic motion to pole plate under this force, and charged corpuscle adsorbs it along the direction of motion Its microgranule forms polymeric macroparticle.This parabolic motion specifically refers to charged corpuscle and is axially following fluid Move along a straight line, radially then do at the uniform velocity or variable motion under electric field force effect, by pole plate controller 254 change electric field intensity 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, it is attached to magnetic on inner-walls of duct Property polymeric macroparticle will be disengaged from tube wall and with low speed with fluid along tube wall enter rotate moulding module 3.

The moulding module of described rotation 3 is for improving the sensitivity of detection.Research shows: cell winding Inductance rate of change be directly proportional to the cube of abrasive particle radius.Meanwhile, the form of magnetizing mediums more trends towards Elongate, its demagnetizing factor is the least, and the intensity of magnetization is the biggest, and magnetizing field field intensity is the biggest.To sensor etc. The change impact of effect inductance is the biggest.The moulding module of this rotation 3 by aluminum matter pipeline 31, some windings 32, Several parts compositions such as iron shell 33, flange 34 and the moulding current output module of some rotations 35. Wherein, described some windings 32 are rotating around outside aluminum matter pipeline 31；Described iron shell 33 is coated with On aluminum matter pipeline 31；Described flange 34 is welded on the two ends of aluminum matter pipeline 31；Each rotation is moulded Shape current output module 35 is connected to a winding 32.

The design principle of the moulding module of described rotation 3 is as follows: polymeric macroparticle enters rotation with fluid and moulds After shape module 3, ECU1 controls to rotate moulding current output module 35, makes the moulding electric current of rotation export Flowing through three-phase symmetrical electric current in module 35, this electric current produces rotating excitation field in aluminum matter pipeline 31.Magnetic Change granule to be acted on by magnetic field force under rotating excitation field effect, and the most spirally Advancing, magnetic microparticles defines a lot of acicular texture along magnetic line of force direction, and these acicular textures are in magnetic field Magnetic field will be followed during rotation spin motion, specifically move along a straight line, radially axially following fluid Then follow rotating excitation field to spin motion.Adjust three-phase symmetrical electric current and can change the speed of screw And track.When the metal particle in the acicular texture and movement locus of motion meets with, it is combined with one another to Bulky grain polymer.By rotating moulding module 3, the particle diameter of the metal particle in fluid is made to increase same Time form become elongated acicular texture so that the fiber number of metal particle is also greatly increased, and further enhances 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 microgranule is big When little and material changes, its changes of magnetic field caused is the faintest, if detection Magnetic field inhomogeneity will be led Cause serious measurement error, make detection sensitivity reduce；Require excitation coil I and excitation coil simultaneously The characteristic of II is completely the same, and this is usually extremely difficult to, for this need design excitation coil I and Excitation coil II has the function of on-line automatic regulation.Specifically, described excitation coil I4 is with sharp Encouraging coil II6 and all comprise some windings, each winding is made up of positive winding 41 and inverse winding 42, respectively around Group is respectively connecting to an exciting current output module 43.This exciting current output module 43 is by ECU1 Control, its use digital potentiometer be AD5206, there is the output of 6 passages, can and ECU1 Between realize single bus data transmission.ECU1 realizes encouraging the polylith of magnetization winding by monobus The current settings of current output module 73 and output.Amplifier AD8601 and metal-oxide-semiconductor 2N7002 lead to Cross negative feedback and achieve the output of high-precision voltage follow.Constant High-current output have employed Texas Instrument (TI) high voltage, amplifier OPA 549 of big electric current.

The operation principle of described detection coil 7 is as follows: in order to produce the magnetic field in same polarity direction the most simultaneously Making up the magnetic field that breach causes unbalanced, positive winding 41 is identical with the current characteristics in inverse winding 42, The axis direction of conduit under fluid pressure 7 is arranged with multipair forward and reverse winding, is exported by different exciting currents Module 43 controls electric current, it is possible to form the uniform magnetic field of system requirements.

Because the abrasive particle in liquid is the least, the impact on former magnetic field is the least, and the magnetic flux i.e. produced becomes Change amount is the least, the sensitivity high in order to ensure sensor, needs to obtain big sense in induction coil Answer electromotive force.According to Faraday law of electromagnetic induction, the size of induced electromotive force and pass through conductor circuit The rate of change of magnetic flux be directly proportional, its direction depends on direction and the situation of change in magnetic field.Magnetic flux When changing less, big to make its rate of change, its approach has two kinds: one to be the number of turn increasing primary coil, But sensor bulk so can be caused excessive, inadvisable；One be former magnetic field magnetic flux be zero, be i.e. in In zero magnetic field.Based on this, three groups of coils of the employing of the sensor of this design.Excitation coil I4 Drive by high-frequency ac power with excitation coil II6, two coil differential concatenations, the magnetic direction of generation On the contrary, and the central authorities that described induction coil 5 is between excitation coil I4 and excitation coil II6, can Make magnetic field at induction coil 5 cancel out each other, be zero magnetic field.Induction coil 5 connects with ECU. When in fluid by there being metal bulky grain, cause disturbance of magnetic field, cause induction coil 5 to produce sensing Electromotive force, utilizes ferromagnetics and the non-ferromagnetic material metal particle otherwise impact to former magnetic field, causes output Signal phase is contrary, can distinguish wear particle type in fluid；Magnetic media grain is the biggest, and fiber number is the biggest, The biggest on magnetic field impact, the amplitude of output signal is the biggest, and the sensitivity of detection 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, and wave filter 8 is decayed in hydraulic system The fluctuation pressure of high, medium and low frequency range, and suppression flowed fluctuation；

2), fluid enters the mechanical centrifugal module 21 separating adsorption module 2 afterwards, makes the mill in fluid Damaging aggregation of particles and realize 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 by ECU1 Controlling to produce the uniform magnetic field vertical with speed v direction, charged particle is subject to vertical in segregation apparatus In velocity attitude and the effect of the Loulun magnetism of magnetic direction, make charged particle under this force to Aluminum matter vessel wall motion, so that the non-ferromagnetic metal wear particle in fluid " separates " from fluid Out, absorption is on tube wall.

7), after magnetic suck and electro-adsorption to enough particle concentrations, ECU1 first controls electro-adsorption mould Block 25 by direction of an electric field the most reversely, then cancels electric field, then adsorb the non-ferromagnetic metal on tube wall Wear particle starts to depart from tube wall slowly enter the moulding module 3 of rotation from static, and electric adsorption module 25 The most then recover original electric field.Meanwhile, ECU1 controls magnetic suck module 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, and electrify mould The power-off of block 24, ferromagnetic particle flows through electrification module 24 and electric adsorption module 25 with low speed with fluid, Enter and rotate 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 flows through three-phase symmetrical electric current in controlling three-phase symmetric winding, and this electric current is at aluminum matter pipeline Interior generation rotating excitation field.Magnetized particles is acted on by magnetic field force under rotating excitation field effect, and at this Spirally advancing under the effect of power, magnetic microparticles defines a lot of acicular texture along magnetic line of force direction, These acicular textures will be followed magnetic field and be spinned motion when magnetic field rotating, when motion acicular texture and When metal particle on movement locus meets with, it is combined with one another to bulky grain polymer.

9), by rotating moulding module 3, the particle diameter of the metal particle in fluid is made to increase form simultaneously Become elongated acicular texture so that the fiber number of metal particle is also greatly increased, and further enhancing two-wire The sensitivity of ring type detection.This two based fine particles is with low speed, high concentration, bulky grain and big fiber number subsequently The magnetic field that state enters excitation coil I4, ECU1 control exciting current holding excitation coil I4 in batches is equal Even property, simultaneously because the power of test of Ferrous particles is greater than copper granule by the inductance of same model Power of test, need ECU1 regulation exciting current to compensate this difference, with keep output one Cause property.

10), excitation coil I4 and excitation coil II6 is driven by high-frequency ac power, and two coils are reverse Series connection, the magnetic direction of generation 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 significantly Induction electromotive force.Utilize ferromagnetics and the non-ferromagnetic material metal particle otherwise impact to former magnetic field, lead Cause phase of output signal is contrary, can distinguish wear particle type in fluid, and the power of induction electromotive force May determine that the quantity of abraded metal particle, thus realize that signal conformance is good, reliability is high, detection The contactless detection of particulates that signal is strong and error is little.

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

Claims (10)

1. with the double excitation solenoid type microgranule sensitive method of structure changes operating mode adaptive-filtering, it is characterized in that: it uses a kind of sensor, this device is arranged on fluid pressure line, including 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 coil I, induction coil, excitation coil II are successively set on fluid pressure line；Described excitation coil I and excitation coil II differential concatenation；Described induction coil central authorities between excitation coil I and excitation coil II；Described ECU is electrically connected with and controls wave filter, separates adsorption module, rotates moulding module, excitation coil I, excitation coil II and induction coil；Described wave filter includes input pipe, shell, outlet tube, S type elastic thin-wall, plug-in type H mode filter, plug-in type cascaded H mode filter and colloid damping layer；Wherein, described input pipe is connected to one end of shell；Described outlet tube is connected to the other end of shell；Described S type elastic thin-wall is installed in shell along the radial direction of shell, forms expansion chamber and contraction chamber in it；Described input pipe, outlet tube and S type elastic thin-wall are collectively forming a S type cavity volume wave filter；Resonance series cavity volume I, resonance series cavity volume II and parallel resonance cavity volume is formed between described S type elastic thin-wall and shell；Separated by an elastic baffle between described resonance series cavity volume I and resonance series cavity volume II；Some conical damping holes are uniformly had in the axial direction of described S type elastic thin-wall；Uniformly having some tapers in the axial direction of described elastic baffle and insert pipe, pipe connection resonance series cavity volume I and resonance series cavity volume II is inserted in described taper；Described plug-in type H mode filter is positioned at parallel resonance cavity volume, and it is connected with conical damping hole；Described plug-in type cascaded H mode filter is positioned at resonance series cavity volume I and resonance series cavity volume II, and it is also connected with conical damping hole；Described plug-in type H mode filter and plug-in type cascaded H mode filter are axially symmetrical set, and form plug-in type connection in series-parallel H mode filter；Described colloid damping layer is arranged on the inner side of S type elastic thin-wall；Described separation adsorption module is made up of the mechanical centrifugal module being sequentially connected with, magnetized module, magnetic suck module, electrification module and electric adsorption module；It comprises the steps:

1), the fluid in fluid pressure line passes through wave filter, the fluctuation pressure of the high, medium and low frequency range in filter attenuation hydraulic system, and suppression flowed fluctuation；

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

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

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

5), fluid passes through electric ignitor, makes the non-ferromagnetic metal wear particle charged polymeric in fluid；

6), fluid flows into electric adsorption module, electric adsorption module absorption non-ferromagnetic metal wear particle；

7), ECU first controls electric adsorption module by direction of an electric field the most reversely, then cancels electric field, makes non-ferromagnetic metal wear particle enter and rotates moulding module, recovers electric field afterwards；Meanwhile, ECU controls magnetic suck module and the power-off of electrification module, and ferromagnetic particle enters and rotates moulding module；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, make the particle diameter of in fluid two kinds of metal particles increase form simultaneously and become elongated acicular texture so that the fiber number of metal particle is also greatly increased；

9), produce magnetic field in opposite direction by excitation coil I and excitation coil II, be positioned at magnetic field at the induction coil of both central authorities and cancel out each other；Two based fine particles enter induction coil in batches, cause induction coil to produce induction electromotive force, thus judge type and the quantity of wear particle.

2. as claimed in claim 1 with the double excitation solenoid type microgranule sensitive method of structure changes operating mode adaptive-filtering, it is characterised in that: the axis of described input pipe and outlet tube is the most on the same axis；The described wider place of conical damping hole opening is positioned at resonance series cavity volume I and parallel resonance cavity volume, and its taper angle is 10 °；Described taper is inserted the wider place of tube opening and is positioned at resonance series cavity volume II, and its taper angle is 10 °；Described taper is inserted the position of pipe and conical damping hole and is mutually staggered；The internal layer of described colloid damping layer and outer layer are respectively outer layer S type elastic thin-wall and internal layer S type elastic thin-wall, are connected by some pillars are fixing between outer layer S type elastic thin-wall and internal layer S type elastic thin-wall；It is filled with, in interlayer between described outer layer S type elastic thin-wall and internal layer S type elastic thin-wall, the pure water adding antifreezing agent, in pure water, is suspended with Bio-sil；Described colloid damping layer is connected with shell near one end of outlet tube；Described colloid damping layer is provided with circular piston near one end of input pipe, is tightly connected between piston and colloid damping layer.

3. as claimed in claim 1 with the double excitation solenoid type microgranule sensitive method of structure changes operating mode adaptive-filtering, it is characterised in that: 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, motor and flow transducer；Wherein, described first flow deflector is provided with 3, and these 3 first flow deflectors are uniformly distributed along tube wall inner periphery every 120 °, and its laying angle is set to 18 °；Described second flow deflector and the first flow deflector structure are identical, after it is arranged on 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；The long limit of described first flow deflector 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 0.4 times of tube wall diameter, 1.8 times of a length of tube wall diameter；Described motor connects and drives the first flow deflector and the second flow deflector, to regulate laying angle；Described flow transducer is arranged on the central authorities in tube wall.

4. as claimed in claim 1 with the double excitation solenoid type microgranule sensitive method of structure changes operating mode adaptive-filtering, it is characterised in that: described magnetized module includes aluminum matter pipeline, some windings, iron shell and flange；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 the two ends of aluminum matter pipeline.

5. as claimed in claim 1 with the double excitation solenoid type microgranule sensitive method of structure changes operating mode adaptive-filtering, it is characterized in that: described magnetic suck module uses homopolarity adjacent type absorbing ring, and this homopolarity adjacent type absorbing ring includes aluminium ring shape pipeline, forward solenoid, reverse solenoid 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 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.

6. as claimed in claim 1 with the double excitation solenoid type microgranule sensitive method of structure changes operating mode adaptive-filtering, it is characterized in that: described magnetic suck module uses the homopolarity adjacent type absorbing ring of charged hammer, 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 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 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 between forward solenoid and reverse solenoid；Described electric shock hammer and electric magnet are between dividing plate；Described electric magnet connects and can promote electric shock hammer, makes electric shock hammer tap aluminium ring shape inner-walls of duct.

7. as claimed in claim 1 with the double excitation solenoid type microgranule sensitive method of structure changes operating mode adaptive-filtering, it is characterised in that: described electrification 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. as claimed in claim 1 with the double excitation solenoid type microgranule sensitive method of structure changes operating mode adaptive-filtering, it is characterised in that: described electric adsorption module includes aluminum matter pipeline, positive plate, minus plate and pole plate controller；Wherein, described positive plate, minus plate are separately positioned 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. as claimed in claim 1 with the double excitation solenoid type microgranule sensitive method of structure changes operating mode adaptive-filtering, it is characterised in that: the moulding module of described rotation 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 the two ends of aluminum matter pipeline；The moulding current output module of each rotation is connected to a winding.

10. as claimed in claim 1 with the double excitation solenoid type microgranule sensitive method of structure changes operating mode adaptive-filtering, it is characterized in that: described excitation coil I and excitation coil II all comprises some windings, each winding is made up of positive winding and inverse winding, each winding is respectively connecting to an exciting current output module, and this exciting current output module is by ECU control.