CN105889232A - Filtering device using wave restraint, electrifying, separating, absorbing and centrifuging - Google Patents

Abstract

The invention relates to a filtering device using wave restraint, electrifying, separating, absorbing and centrifuging. The filtering device using the wave restraint, the electrifying, the separating, the absorbing and the centrifuging comprises a filter, a U-shaped particle separating module, an oil return barrel and an outer barrel. The filter, the U-shaped particle separating module, the oil return barrel and the outer barrel are arranged on a base plate in order. The filter, using a working condition self-adapting wave restraint filter, is connected with the U-shaped particle separating module. The U-shaped particle separating module comprises a U-shaped pipe which is provided with an electrifying module, a separating module, a first absorbing module, a mechanical centrifuging module, a second absorbing module and a demagnetization module in order. The top of the U-shaped particle separating module is connected with the top of the oil return barrel by an oil inlet pipe of the oil return barrel. An inner barrel is arranged in the outer barrel and is installed on an end cap. A spiral flow channel is contained in the inner barrel and is connected with the U-shaped particle separating module by the oil inlet pipe of the inner barrel, wherein the oil inlet pipe of the inner barrel is located in the oil inlet pipe of the oil return barrel. A filter element is arranged on the inner wall of the inner barrel. The oil filter has the advantages of being good in filtering property, high in adaptability and integration, long in service life and like.

Description

A kind of employing presses down ripple, the defecator electrifying, separate, adsorb and being centrifuged

[technical field]

The present invention relates to a kind of hydraulic oil filter, be specifically related to a kind of use press down ripple, electrify, separate, Absorption and centrifugal defecator, belong to technical field of hydraulic equipment.

[background technology]

Statistics both domestic and external show, the fault of hydraulic system about 70%～85% is due to oil Liquid pollution causes.Solid particle is then the pollutant the most universal in oil contamination, damaging effect is maximum. The hydraulic system fault caused by solid grain contamination accounts for the 70% of gross contamination fault.In hydraulic system In particulate pollutant in fluid, metal filings accounting is between 20%～70%.Adopt an effective measure Filter the solid grain contamination in fluid, be the key of Pollution Control in Hydraulic System, be also system peace The Reliable guarantee of row for the national games.

Filter is the key element that hydraulic system filters solid grain contamination.Solid in hydraulic oil Particulate pollutant, outside the precipitable a part of larger particles of oil removal box, filters mainly by oil-filtering apparatus. Especially high pressure filtering device, is mainly used to filter flow direction control valve and the hydraulic oil of hydraulic cylinder, to protect Protect the Hydraulic Elements of this kind of contamination resistance difference, therefore the cleannes of hydraulic oil are required higher.

But, the high pressure filter that existing hydraulic system uses has the disadvantage that (1) all kinds of liquid The cleannes of fluid are required different by pressure element, and the size of the solid particle in fluid is the most each Differ, need for this multiple dissimilar wave filter to be installed, thus at the diverse location of hydraulic system Bring cost and the problem installing complexity；(2) filter in hydraulic system mainly uses filter cake Filter type, during filtration, filtrate is perpendicular to filter element surface flowing, and trapped solid particle is formed Filter cake progressive additive, the rate of filtration is gradually reduced the most therewith until filtrate stops flowing out, and reduces The service life of filtering element.

Therefore, for solving above-mentioned technical problem, the employing of a kind of innovation of necessary offer presses down ripple, rises Electricity, the defecator separating, adsorb and being centrifuged, 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 strainability good, adapt to Property and integration high, service life, the employing of length pressed down ripple, the filtration electrifying, separate, adsorb and being centrifuged Device.

For achieving the above object, the technical scheme that the present invention takes is: a kind of use press down ripple, electrification, Separate, the defecator that adsorbs and be centrifuged, it include base plate, wave filter, U-shaped separation of particles module, Oil returning tube, inner core, helical flow path, filter element, outer barrel and end cap；Wherein, described wave filter, U Type separation of particles module, oil returning tube, outer barrel are sequentially placed on base plate；Described wave filter include input pipe, Shell, outlet tube, elastic thin-wall, H mode filter and cascaded H mode filter；Wherein, described Input pipe is connected to one end of shell, and it extends in shell, itself and hydraulic oil inlet docking；Institute Stating outlet tube and be connected to the other end of shell, it extends in shell, itself and U-shaped separation of particles module Docking；Described elastic thin-wall is installed in shell along the radial direction of shell；Described input pipe, outlet tube and Elastic thin-wall is collectively forming a two-tube slip-on filter；Uniformly have in the axial direction of described elastic thin-wall Some taper structure changes damping holes；Described taper structure changes damping hole is by cone shaped elastic damping hole pipe and seam Hole forms；Resonance series cavity volume I and parallel resonance cavity volume is formed between described elastic thin-wall and shell； The outside of described resonance series cavity volume I set a resonance series cavity volume II, described resonance series cavity volume I and Insert pipe by a taper between 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；Institute Stating cascaded H mode filter and be positioned at resonance series cavity volume I and resonance series cavity volume II, it is also and taper Structure changes 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 U-shaped separation of particles module includes a U-tube, U-shaped Be sequentially installed with on pipe electrification module, separation module, the first adsorption module, mechanical centrifugal module, the Two adsorption modules and demagnetization module；The top of described U-shaped separation of particles module and oil returning tube is passed through one time Oil cylinder oil inlet pipe connects；Described inner core is placed in outer barrel, if it is installed by a top board and bolt stem On end cap；Described helical flow path is contained in inner core, passes through between itself and U-shaped separation of particles module One inner core oil inlet pipe connects；Described inner core oil inlet pipe is positioned at oil returning tube oil inlet pipe, and extends into U-shaped The central authorities of separation of particles module, its diameter is less than oil returning tube oil inlet pipe diameter, and and oil returning tube oil inlet pipe It is coaxially disposed；Described filter element is arranged on the inwall of inner core, and its precision is 1-5 micron；Said tub Bottom be provided with a hydraulic oil oil-out.

The defecator that the employing of the present invention presses down ripple, electrifies, separate, adsorb and is centrifuged is arranged further For: the axis of described input pipe and outlet tube is the most on the same axis；Described taper structure changes 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 State the Young's modulus Young mould than elastic thin-wall of taper structure changes damping hole cone shaped elastic damping hole pipe Amount wants big, can be with change in fluid pressure stretching or compression；The Young's modulus of slot apertures damps than cone shaped elastic The Young's modulus of hole pipe wants big, can be with fluid opened by pressure or closedown；Described taper inserts tube opening relatively Being positioned at resonance series cavity volume II at Kuan, its taper angle is 10 °.

The defecator that the employing of the present invention presses down ripple, electrifies, separate, adsorb and is centrifuged is arranged further For: described electrification module includes some electrodes and an electrode controller；Described some electrodes are installed on On first oil return pipe, it is respectively connecting to electrode controller.

The defecator that the employing of the present invention presses down ripple, electrifies, separate, adsorb and is centrifuged is arranged further For: described separation module uses uniform magnetic field separation module, and this uniform magnetic field separation module includes aluminum matter Pipeline, two magnetic poles and magnetic pole controller；Wherein, said two magnetic pole is separately positioned on aluminum matter pipe On road, the opposite polarity of these two magnetic poles, and in being oppositely arranged；Said two magnetic pole the most electrically connects It is connected on magnetic pole controller.

The defecator that the employing of the present invention presses down ripple, electrifies, separate, adsorb and is centrifuged is arranged further For: described separation module uses rotating excitation field separation module, and this rotating excitation field separation module includes aluminum matter Pipeline, iron shell, three-phase symmetric winding and three-phase symmetrical current module；Described three-phase symmetrical around Group is wound on outside aluminum matter pipeline；Described iron shell is coated on aluminum matter pipeline；Described three-phase symmetrical electric current Module connects described three-phase symmetric winding.

The defecator that the employing of the present invention presses down ripple, electrifies, separate, adsorb and is centrifuged is arranged further For: described separation module uses helical pipe magnetic field separation module, this helical pipe magnetic field separation module Including aluminum matter helical pipe, solenoid and solenoid control circuit；Wherein, described aluminum matter serpentine pipe Road is arranged in solenoid；Described solenoid and solenoid control circuit are electrically connected with.

The defecator that the employing of the present invention presses down ripple, electrifies, separate, adsorb and is centrifuged is arranged further For: described first adsorption module and second is inhaled adsorption module and is used homopolarity adjacent type absorbing ring, 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；Institute Stating irony magnetic conduction cap to be arranged on the inwall of aluminium ring shape pipeline, it is positioned at forward solenoid and reverse spiral shell Spool adjacent and forward solenoid and the intermediate point of reverse solenoid axis.

The defecator that the employing of the present invention presses down ripple, electrifies, separate, adsorb and is centrifuged is arranged further For: described first adsorption module and second is inhaled adsorption module and is used the homopolarity adjacent type absorption of charged hammer Ring, the homopolarity adjacent type absorbing ring of this charged hammer includes aluminium ring shape pipeline, forward solenoid, anti- To 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 just Like pole is produced to solenoid and reverse solenoid adjacent；Described irony magnetic conduction cap is arranged in aluminum matter On the inwall of circulating line, it is positioned at forward solenoid and reverse solenoid adjacent and forward spiral shell Spool and the intermediate point of reverse solenoid axis；Described dividing plate is positioned at forward solenoid and reverse solenoid Between；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.

The defecator that the employing of the present invention presses down ripple, electrifies, separate, adsorb and is centrifuged is arranged further For: described mechanical centrifugal module uses eddy flow to be centrifuged module；Described eddy flow is centrifuged module and includes cyclone pipe Wall, the first flow deflector, the second flow deflector, motor and flow transducer；Wherein, described One flow deflector is provided with 3, and these 3 first flow deflectors are uniformly distributed along tube wall inner periphery every 120 °, Its laying angle is set to 18 °；Described second flow deflector and the first flow deflector structure are identical, and it is arranged on After one flow deflector, and and the first flow deflector stagger 60 ° and be connected in tube wall, its laying angle is set to 36 ℃；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 Frustrating into obtuse, trailing edge is processed into wing, and its height is 0.4 times of tube wall diameter, and a length of tube wall is straight 1.8 times of footpath；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 defecator that the employing of the present invention presses down ripple, electrifies, separate, adsorb and is centrifuged is also configured to: The bottom of described oil returning tube is provided with an overflow valve, is provided with an automatically controlled set screw bottom this overflow valve；Institute Stating overflow valve and be provided with an oil drain out, this oil drain out is connected to a fuel tank by pipeline；Described inner core Bottom is in rounding mesa-shaped, and it is connected by an inner core oil exit pipe and oil returning tube, and inner core oil exit pipe is provided with One automatically controlled check-valves；The center upright of described inner core is provided with a hollow cylinder, and the top of hollow cylinder sets Having pressure difference indicator, this pressure difference indicator is installed on end cap；Described inner core oil inlet pipe and helical flow path Tangent connection.

Compared with prior art, there is advantages that

1. pulsed by the pressure/flow of filter attenuation hydraulic oil, make filter element not occur Vibration, to improve strainability；Hydraulic oil realizes dividing of solid particle in U-shaped separation of particles module From, make the solid particle in fluid to vessel wall motion, at U-shaped separation of particles module outlet, rich in The fluid of the near-wall of solid particle is back to fuel tank after entering oil returning tube by oil returning tube oil inlet pipe, The only fluid of the pipeline center containing trace small particle microgranule is then entered by inner core oil inlet pipe entrance inner core Row high-precision filtration, improves the service life of filter element, reduces filtering cost and complexity；Enter The fluid of inner core oil inlet pipe flows into the helical flow path of inner core in the way of tangential influent stream, and inner tube wall is filter Core, then filtrate is close to filter core flow under the influence of centrifugal force, and the surface that filtrate is parallel to filter element is quick Flowing, the hydraulic oil after filtration is then perpendicular to cartridge surface direction and flows out to urceolus, and this cross flows through The microgranule of cartridge surface is implemented to sweep stream effect by filter mode, it is suppressed that the increase of filter cake thickness, is deposited on Pollution granule bottom inner core regularly can be discharged to oil returning tube by automatically controlled check-valves, thus improves filter element Service life.

2. by making the particulate matter charged polymeric in fluid to electrode applying voltage, and promote colloid Grain decomposition is melted；Efficient absorption is formed by adsorption module；Utilize small by fluid of mechanical centrifugal Granule " separates " and gathers near-wall, captures molecule with adsorbent equipment；Filled by demagnetization Put and avoid residual particles demagnetization endangering Hydraulic Elements, so that solid particle is gathered into big in fluid Grain moves to near-wall.

3. the generation of non-uniform magnetic-field that magnetization needs, need multipair forward and reverse coil to and by different greatly Little electric current, and current values can numeral setting online.

[accompanying drawing explanation]

Fig. 1 is the knot of defecator that the employing of the present invention presses down ripple, electrifies, separates, adsorbs and be centrifuged Structure schematic diagram.

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 schematic diagram of the U-shaped separation of particles module in Fig. 1.

Figure 12 is the structural representation of the electrification module in Figure 11.

Figure 13 be the separation module in Figure 11 be the structural representation of uniform magnetic field separation module.

Figure 14 be the separation module in Figure 11 be the structural representation of rotating excitation field separation module.

Figure 15 be the separation module in Figure 11 be the structural representation of helical pipe magnetic field separation module.

Figure 16 be the first adsorption module (the second adsorption module) in Figure 11 be homopolarity adjacent type absorption The structural representation of ring.

Figure 17 is the homopolarity that the first adsorption module (the second adsorption module) is charged hammer in Figure 11 The structural representation of adjacent type absorbing ring.

Figure 18 is the horizontal schematic diagram of the mechanical centrifugal module of Figure 11.

Figure 19 is the radial direction schematic diagram of the mechanical centrifugal module of Figure 11.

[detailed description of the invention]

Refer to shown in Figure of description 1 to accompanying drawing 19, the present invention for one use press down ripple, electrification, The defecator separate, adsorbing and being centrifuged, it is by base plate 6, wave filter 8, U-shaped separation of particles module 3, oil returning tube 7, inner core 15, helical flow path 17, filter element 18, outer barrel 19 and end cap 25 etc. are several Part composition.Wherein, described wave filter 8, U-shaped separation of particles module 2, oil returning tube 7, outer barrel 19 It is sequentially placed on base plate 6.

Described wave filter 8 for hydraulic oil is inputted, and can decay in hydraulic system high, medium and low The fluctuation pressure of frequency range, and suppression flowed fluctuation.Described wave filter 8 by input pipe 81, shell 88, Outlet tube 89, elastic thin-wall 87, H mode filter 812 and cascaded H mode filter 813 etc. are several Part composition.

Wherein, described input pipe 81 is connected to one end of shell 89, and it extends in shell 88, Itself and a hydraulic oil inlet 1 are docked；Described outlet tube 811 is connected to the other end of shell 89, and it prolongs Stretching in shell 88, itself and U-shaped separation of particles module 3 are docked.Described elastic thin-wall 87 is along shell Radial direction be installed in shell 88.The axis of described input pipe 81 and outlet tube 89 is not at same axle On line, 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 Double-pipe plug-in type filtering Device, thus hydraulic system high frequency pressure pulsations of decaying.The wave filter obtained after processing by lumped-parameter method Transmission coefficient is:

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

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 Insert length of tube L cavity volume total length and the difference of input outfan insertion 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.Different When the pressure pulse wave of frequency is by this wave filter, transmission coefficient is different with frequency.Frequency is the highest, Then transmission coefficient is the least, and this shows that the pressure pulse wave of high frequency is decayed the most strict when device after filtering Evil, thus serve the effect eliminating high frequency pressure pulsations.

The design principle of described Double-pipe plug-in type wave filter is as follows: in pipeline, the fluctuating frequency of pressure is higher Time, pressure oscillation acts on convection cell on fluid and produces pinch effect.When the flow of change is by input When pipe enters Double-pipe plug-in type cavity volume, liquid stream exceedes average discharge, and it is unnecessary that the cavity volume of expansion can absorb Liquid stream, and when less than average discharge, release liquid stream, thus absorption pressure pulsation energy.

Described elastic thin-wall 87 weakens hydraulic system medium-high frequency pressure fluctuation by being forced to mechanical vibration. The 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 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 elastic thin-wall 87 intrinsic Frequency is generally high than the natural frequency of H mode filter, and its attenuation band is also wide than H mode filter. In relatively wide frequency band range, elastic thin-wall has good attenuating to pressure fluctuation.With Time, the elastic thin-wall radius in the filter construction of the present invention is bigger and relatively thin, and its natural frequency is more leaned on Nearly 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 more weak to the damping capacity of pressure oscillation, flows into the periodically pulsing pressure of wave filter S type cavity volume Continuous action is on the inside and outside wall of elastic thin-wall 87, and owing to having between inside and outside wall, pillar is fixing to be connected, Inside and outside elastic thin-wall does periodic vibration by the frequency of fluctuation pressure simultaneously, and this forced vibration consumes stream The pressure fluctuation energy of body, thus realize the filtering of Mid Frequency pressure.From the principle of virtual work, Thin Elastic The ability that wall consumes fluid pulsation pressure energy is direct with potential energy during its forced vibration and kinetic energy sum Relevant, in order to improve 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 is less than 0.1mm.

Further, between described elastic thin-wall 87 and shell 88 formed resonance series cavity volume I84 with And parallel resonance cavity volume 85.The outside of described resonance series cavity volume I84 sets a resonance series cavity volume II83, Pipe 82 is inserted even by a taper between described resonance series cavity volume I84 and resonance series cavity volume II83 Logical, this taper insertion pipe 82, near input pipe 81 side, makes resonance cavity volume I and II form unsymmetrical knot Structure, to reduce wave filter natural reonant frequency.Described taper is inserted the wider place of pipe 82 opening and is positioned at string Allying the communists and shake in cavity volume II83, its taper angle is 10 °.Uniformly open in the axial direction of described elastic thin-wall 87 There are some taper structure changes damping holes 86.

Described H mode filter 812 is positioned at parallel resonance cavity volume 85, and itself and taper structure changes damp Hole 86 is connected.The wider place of described taper structure changes damping hole 86 opening is positioned at resonance series cavity volume I84 With in parallel resonance cavity volume 85, its taper angle is 10 °.The filter obtained after processing by lumped-parameter method Ripple device natural angular frequency is:

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

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 In, it is also connected with taper structure changes damping hole 86.After processing by lumped-parameter method, cascaded H Two natural angular frequencies of 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 Connection in series-parallel H mode filter, for broadening frequency filtering scope and make overall structure more compact.The present invention Circumferentially interface distributions multiple connection in series-parallel H mode filters (only depicting 2 in figure), each other it Between separate with dividing plate 820, the resonance bands of these multiple wave filter is different, can after combining Cover whole medium and low frequency filtering frequency range, it is achieved the entire spectrum filtering of medium and low frequency section comprehensively.

All can be found by Fig. 6 H mode filter and cascaded H mode filter frequency characteristic and formula, series connection H mode filter has 2 natural angular frequencies, and at crest, filter effect is preferable, then base at trough Originally there is no filter effect；H mode filter has 1 natural angular frequency, equally filter effect at crest Preferably, at trough, the most substantially do not has filter effect；Select suitable filter parameter, make H type The natural angular frequency of wave filter just falls between 2 natural angular frequencies of cascaded H mode filter, as Shown in Fig. 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 at trough preferably Filter effect.The bank of filters that multiple connection in series-parallel H mode filters are constituted 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 by cone shaped elastic damping hole pipe 16 and slot apertures 15 compositions, taper narrow end is opened on elastic thin-wall 87.The wherein poplar of cone shaped elastic damping hole pipe 16 The Young's modulus of family name's modular ratio elastic thin-wall 87 wants big, can be with change in fluid pressure stretching or compression； The Young's modulus of slot apertures 15 is bigger than the Young's modulus of cone shaped elastic damping hole pipe 16, can be with fluid pressure Power is turned on and off.Therefore when the fluctuating frequency of pressure falls at high band, c-type cavity volume filter construction rises Filter action, cone shaped elastic damping hole pipe 16 and slot apertures 15 are all in Figure 10 (a) state；And work as Ripple frequency falls when Mid Frequency, and filter construction becomes c-type cavity volume filter construction and elastic thin-wall 87 filter structures concur, and cone shaped elastic damping hole pipe 16 and slot apertures 15 are all in Figure 10 (a) State；When ripple frequency falls at some specific Frequency, filter construction becomes plug-in type string H mode filter in parallel, c-type cavity volume filter construction and elastic thin-wall filter structure concur, Cone shaped elastic damping hole pipe 16 and slot apertures 15 are all in Figure 10 (b) state, due to plug-in type string also The natural frequency of connection H mode filter is designed to consistent, to fundamental frequency with these particular low frequency ripple frequencies The system that energy is big can play preferable filter effect；When ripple frequency falls beyond some characteristic frequency Low-frequency range time, cone shaped elastic damping hole pipe 16 and slot apertures 15 are all in Figure 10 (c) state.This The structure changes wave filter design of sample both ensure that the full frequency band full working scope filtering of hydraulic system, reduces again The pressure loss of wave filter under nominal situation, 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 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 more than system main pressure, and the cavity volume of the connection in series-parallel H mode filter group of wave filter is long Degree, the length of Double-pipe plug-in type cavity volume wave filter and the length of elastic thin-wall and wave filter axial length phase Deng, it is ensured that pressure peak position is constantly in the effective range of wave filter；And connection in series-parallel H The taper structure changes damping hole of mode filter is opened on elastic thin-wall, is uniformly distributed in the axial direction, makes Obtain pressure peak change in location the performance of wave filter to be had little to no effect, it is achieved thereby that operating mode is adaptive Answer filter function.Suitable in view of three kinds of filter structure axial dimensions and wave filter, this bigger chi Very little 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 many Remaining liquid stream, completes the filtering of high frequency pressure pulsations；

2), by elastic thin-wall 87 forced vibration, the pressure fluctuation energy of fluid is consumed, in completing The filtering of pressure fluctuation frequently；

3), by connection in series-parallel H mode filter group, and taper structure changes 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 Connection in series-parallel H mode filter length, Double-pipe plug-in type filter length and elastic thin-wall 87 length are with filter Ripple device length is equal, makes pressure peak position be constantly in the effective range of wave filter, it is achieved to be The filtering of pressure fluctuation when system operating mode changes；

5), by stretching of the cone shaped elastic damping hole pipe of taper structure changes damping hole and opening of slot apertures Close, complete pressure fluctuation adaptive-filtering.

Described U-shaped separation of particles module 3 includes a U-tube 31, and U-tube 31 is sequentially installed with Electrification module 32, separation module the 33, first adsorption module 34, mechanical centrifugal module 36, second are inhaled Attached module 37 and demagnetization module 35.

Described electrification module 32 makes the metallic particles material in fluid charged, and it is by some electrodes 321 And one electrode controller 322 form.Described some electrodes 321 are installed in U-tube 31, its It is respectively connecting to electrode controller 252.Described electrode controller 322 is electrically connected with to be executed to electrode 321 Making alive, makes the particulate matter in fluid charged.

Described separation module 33 make particle charge that quality is bigger poly-be incorporated under centrifugal action get rid of to Cavity wall, it can use uniform magnetic field separation module, rotating excitation field separation module or helical pipe magnetic field to divide From module.

When described separation module 33 uses uniform magnetic field separation module, it is by 331, two, aluminum matter pipeline Magnetic pole 332 and magnetic pole controller 333 form.Wherein, said two magnetic pole 332 is separately positioned on On aluminum matter pipeline 331, the opposite polarity of these two magnetic poles 332, and in being oppositely arranged.Said two Magnetic pole 332 is respectively and electrically connected on magnetic pole controller 333.

The design principle of described uniform magnetic field separation module 33 is as follows: charged particle flows into speed V Uniform magnetic field separation module 33, two magnetic poles 332 of uniform magnetic field separation module 33 produce and speed The uniform magnetic field that V direction is vertical, according to left hand rule, then charged particle is at uniform magnetic field separation module By being perpendicular to acting on of the Loulun magnetism of velocity attitude and magnetic direction in 33, this power does not change charged The speed of granule, it only changes the direction of motion of charged particle, makes charged particle under this force To the vessel wall motion of aluminum matter pipeline 331, so that the granule in fluid " separates " out from fluid, Assemble to tube wall, it is simple to subsequent adsorbtion captures.Owing to fluid has certain viscosity, granule is to tube wall Motor process is also acted on by viscous drag.In order to ensure separating effect, need to regulate magnetic field strong Degree B makes the granule of distance tube wall farthest to move at tube wall within the action time of separation module, Quantitative analysis is as follows:

Assuming that particle mass is m, speed is v, and magnetic field intensity is B, and carried charge is q, separation module A diameter of D, a length of L, then:

Acting on the Loulun magnetism on charged particle is

F_l=qvB

The viscous drag that charged particle is subject to is

F_d=6 π η r v

Charged of the radius v of η hydraulic pressure oil viscosity r charged particle Grain movement velocity

It not general, it is assumed that the granule in fluid has reached stable state when entering separation module, the most charged Granule can be approximated by the time of separation module and represent with following formula

$t_1=\frac{L}{v}$

The charged particle of distance tube wall farthest moves to the time t at tube wall₂Can be solved by following formula

$D=\frac{mg}{qB-6\mathrm{\π}\mathrm{\η}r}t-{\left(\frac{mg}{qB-6\mathrm{\π}\mathrm{\η}r}\right)}^2(1-e^{-\frac{qB-6\mathrm{\π}\mathrm{\η}r}{m}t})$

Regulation B so that t₁>t₂, i.e. can reach separating effect.

When described separation module 33 uses rotating excitation field separation module, it is by aluminum matter pipeline 331, irony The parts compositions such as shell 334, three-phase symmetric winding 335 and three-phase symmetrical current module 336.Institute State three-phase symmetric winding 335 to be wound on outside aluminum matter pipeline 331.Described iron shell 334 is coated on aluminum matter On pipeline 335.Described three-phase symmetrical current module 336 connects described three-phase symmetric winding 335.

The design principle of described rotating excitation field separation module 33 is as follows: charged particle flows into speed V Rotating excitation field separation module 33, three-phase symmetrical current module 336 makes to flow through in three-phase symmetric winding 335 Three-phase symmetrical electric current, this electric current produces rotating excitation field in aluminum matter pipeline 331, and charged particle is rotating By being perpendicular to acting on of the Loulun magnetism of velocity attitude and magnetic direction under the action of a magnetic field, this power does not changes Becoming the speed of charged particle, it only changes the direction of motion of charged particle, makes charged particle in this power Spirally advance under effect, and to vessel wall motion.Reasonable adjusting magnetic field intensity can make in fluid Granule " separates " out from fluid, is gathered in near-wall, it is simple to subsequent adsorbtion captures.Due to Fluid has certain viscosity, and granule is also acted on by viscous drag during vessel wall motion.For Guarantee separating effect, need to make the microgranule on aluminum matter pipeline 331 axis can be in the effect of separation module Moving in time at tube wall, quantitative analysis is as follows:

Assuming that particle mass is m, speed is v, and magnetic field intensity is B, and carried charge is q, separation module A diameter of D, a length of L, then:

Acting on the Loulun magnetism on charged particle is

F_l=qvB

The viscous drag that charged particle is subject to is

F_d=6 π η r v

Charged of the radius v of η hydraulic pressure oil viscosity r charged particle Grain movement velocity

Assuming that the granule in fluid has reached stable state when entering separation module, then charged particle is by separating The time of module can approximate and represent with following formula

$t_1=\frac{L}{v}$

Charged particle on conduit axis moves to the time t at tube wall₂Can be solved by following formula

$\frac{D}{2}=\frac{mg}{qB-6\mathrm{\π}\mathrm{\η}r}t-{\left(\frac{mg}{qB-6\mathrm{\π}\mathrm{\η}r}\right)}^2(1-e^{-\frac{qB-6\mathrm{\π}\mathrm{\η}r}{m}t})$

Regulation B so that t₁>t₂, i.e. can reach separating effect.

When described separation module 33 uses helical pipe magnetic field separation module, it is by aluminum matter helical pipe 338, solenoid 339 and solenoid control circuit 336 form.Wherein, described aluminum matter serpentine pipe Road 338 is arranged in solenoid 339.Described solenoid 339 and solenoid control circuit 336 are electrical Connect.Described solenoid control circuit 336 is electrically connected to ECU3.

The design principle of described helical pipe magnetic field separation module 33 is as follows: carry the oil of charged particle Liquid advances along aluminum matter helical pipe 338, thus produces at pipeline exit and have certain spin direction Eddy flow, the charged particle of heavier mass rotates along with fluid, produces under the influence of centrifugal force to tube wall Radial motion；Simultaneously as the Way in of aluminum matter helical pipe 338 and energization solenoid 339 Axial magnetic field direction vertical, enter the charged particle of aluminum matter helical pipe 338 by Lip river with speed v The effect of logical sequence magnetic force, direction is perpendicular to magnetic direction and the Way in of aluminum matter helical pipe 338.Lip river Logical sequence magnetic force makes charged particle spin in pipeline forward travel, due to entering of aluminum matter helical pipe 338 Mouthful direction and magnetic direction are close to vertical, and charged particle mainly rotates in a circumferential direction motion, and fluid is the most not Impacted, thus realize granule " separation " from fluid, in order to realize the absorption to granule.For Ensure " separation " effect, need to make the microgranule on aluminum matter conduit axis can be when the effect of separation module In move at tube wall, quantitative analysis is as follows:

Assuming that particle mass is m, speed is v, and carried charge is q, a diameter of D of aluminum matter helical pipe, The number of turn of aluminum matter helical pipe is n, the Way in of aluminum matter helical pipe and energization solenoid axial The angle of magnetic direction is θ, and the solenoid number of turn is N, and electric current is I, and magnetic field intensity is B, Vacuum Magnetic Conductance is μ₀, then:

Acting on the Loulun magnetism on charged particle is

F_l=qvB

The viscous drag that charged particle is subject to is

F_d=6 π η r v

Charged of the radius v of η hydraulic pressure oil viscosity r charged particle Grain movement velocity

Charged particle can be approximated by the time of separation module and represent with following formula

$t_1=\frac{qBnD}{2\mathrm{\π}mvcos\mathrm{\θ}}$

Charged particle on conduit axis moves to the time t at tube wall₂Can be solved by following formula

$\frac{D}{2}=vsin\mathrm{\θ}\frac{m}{qB+6\mathrm{\π}\mathrm{\η}r}(1-e^{-\frac{qB+6\mathrm{\π}\mathrm{\η}r}{m}t})$

Magnetic field intensity within solenoid can be approximately constant

$I=\frac{B}{\mathrm{\μ}N}$

Regulation I so that t₁>t₂, i.e. can reach separating effect.

Described first adsorption module 34 is the most micro-for adsorbing the magnetic polymeric after separated module 33 separates , it can use homopolarity adjacent type absorbing ring, and this homopolarity adjacent type absorbing ring is by aluminium ring shape pipeline 341, the parts such as forward solenoid 342, reverse solenoid 343 and irony magnetic conduction cap 344 composition. Wherein, described forward solenoid 342 and reverse solenoid 343 are respectively arranged in aluminium ring shape pipeline 341, both are connected with electric current in opposite direction so that forward solenoid 342 and reverse solenoid 343 Adjacent produces like pole.Described irony magnetic conduction cap 344 is arranged in the interior of aluminium ring shape pipeline 341 On wall, it is positioned at forward solenoid 342 and reverse solenoid 343 adjacent and forward solenoid 342 and the intermediate point of reverse solenoid 343 axis.

The design principle of described homopolarity adjacent type absorbing ring is as follows: energising forward solenoid 342, reversely Solenoid 343, adjacent forward solenoid 342, reverse solenoid 343 are connected with electricity in opposite direction Stream so that forward solenoid 342, reverse solenoid 343 adjacent produce like pole；Meanwhile, Aluminium ring shape pipeline 341 can improve magnetic circuit, strengthens the magnetic field intensity at inner-walls of duct, strengthens irony The magnetic conduction cap 344 capture absorbability to granule.Each forward solenoid 342, reverse solenoid 343 Electric current can be different with concentration and change, to obtain optimal adsorption performance according to the size of granule.

Further, described first adsorption module 34 may be used without the homopolarity adjacent type suction of charged hammer Follower ring, the homopolarity adjacent type absorbing ring of this charged hammer is by aluminium ring shape pipeline 341, forward solenoid 342, reverse solenoid 343, irony magnetic conduction cap 344, dividing plate 345, electric shock hammer 346 and electromagnetism Ferrum 347 parts such as grade form.Wherein, described forward solenoid 342 and reverse solenoid 343 cloth respectively Being placed in aluminium ring shape pipeline 341, both are connected with electric current in opposite direction so that forward solenoid 342 Like pole is produced with reverse solenoid 343 adjacent.Described irony magnetic conduction cap 344 is arranged in aluminum matter On the inwall of circulating line 341, its be positioned at forward solenoid 342 and reverse solenoid 343 adjacent, And forward solenoid 342 and the intermediate point of reverse solenoid 343 axis.Described electric shock hammer 346 Hes Electric magnet 347 is between dividing plate 345.Described electric magnet 347 connects and can promote electric shock hammer 346, Make electric shock hammer 346 percussion aluminium ring shape pipeline 342 inwall.

The design principle of the homopolarity adjacent type absorbing ring of described charged hammer is as follows: energising forward solenoid 342, reverse solenoid 343, adjacent forward solenoid 342, reverse solenoid 343 are connected with direction Contrary electric current so that forward solenoid 342, reverse solenoid 343 adjacent produce like pole； Meanwhile, aluminium ring shape pipeline 341 can improve magnetic circuit, strengthens the magnetic field intensity at inner-walls of duct, increases The strong irony magnetic conduction cap 344 capture absorbability to granule.Each forward solenoid 342, reverse helical Pipe 343 electric current can be different with concentration and change, to obtain best adsorption according to the size of granule Energy.And by the setting of electric shock hammer 346, prevent granule bulk deposition at irony magnetic conduction cap 344, Affect adsorption effect.Now, controlled in electric shock hammer 346 percussion pipeline 341 by electric magnet 347 Wall so that adsorbed granule scatter to both sides.Meanwhile, when cleaning pipeline 341, electric shock hammer The percussion of 346 can also improve cleaning performance.

Described first adsorption module 34 is designed to U-shaped, when fluid enters U-shaped absorption pipeline, Grain gravity, centrifugal force effect under, to side, tube wall moves, plus magnetic field force effect, radially Translational speed is accelerated, and the efficiency of granular absorption is improved；Leave U-shaped absorption pipeline at fluid to rise Time, gravity and magnetic field force make a concerted effort so that granule diagonally under direction motion, extend numerical density Time, improve the efficiency of granular absorption.

Described mechanical centrifugal module 36 makes the magnetization aggregated particles not to be adsorbed in fluid at centrifugal work It is thrown toward tube wall under with.Described mechanical centrifugal module 36 selects eddy flow to be centrifuged module 36, this eddy flow from Core module 36 uses the mode of energy loss, and its design principle is as follows: arrange certain height in the duct The flow deflector of the distortion of degree and length, and make blade face tangent line angled with axis, because of pipe flow border Changing and fluid can be made to produce spiral flow in pipes, this spiral flow can be analyzed to the circumferential flow around pipe axle With axial straight flowing, the particulate matter carried in fluid produces off-axis alignment heart screw.This eddy flow Centrifugal device 36 is by eddy flow tube wall the 361, first flow deflector the 362, second flow deflector 363, stepping electricity Several parts compositions such as machine 364 and flow transducer 365.

Wherein, described first flow deflector 362 is provided with 3, and these 3 first flow deflectors 362 are along tube wall 361 inner peripherys are uniformly distributed every 120 °, its laying angle (the first flow deflector 362 and eddy flow tube wall 361 Between angle) be set to 18 °, to ensure optimal tangential flowing.Described second flow deflector 363 and One flow deflector 362 structure is identical, after it is arranged on the first flow deflector 362, and and the first flow deflector 362 Staggering 60 ° and be connected in tube wall 361, 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 364 connects and drives the first flow deflector 362 and Two flow deflectors 363, to regulate laying angle, thus can obtain more preferable centrifugal effect, know and make water conservancy diversion Sheet 362,363 adapts to different operating modes.Described flow transducer 365 is arranged in tube wall 361 Central authorities, by the numerical analysis cyclonic separation effect of reading flow quantity sensor 365, and control step accordingly Entering motor 364, motor 364 regulates the laying angle of each flow deflector 362,363, to obtain more Separating effect.

Described second adsorbent equipment 37 is identical with described first adsorbent equipment 34 structure, function and effect Mechanism is the most identical, and it can adsorb the granule separated through mechanical centrifugal module 36 further.

Described demagnetization module 35 gives magnetized particles demagnetization, prevents residual magnetism microgranule from being entered by oil returning tube Oil pipe enters hydraulic circuit, and sensitive to pollution Hydraulic Elements cause damage.

An oil returning tube oil inlet pipe 22 is passed through in the top of described U-shaped separation of particles module 3 and oil returning tube 7 Connect；By U-shaped separation of particles module 3 process after, the fluid of U-tube 31 near-wall rich in Aggregated particles, is back to fuel tank after entering oil returning tube 7 by oil returning tube oil inlet pipe 22.

The bottom of described oil returning tube 7 is provided with an overflow valve 8, is provided with an automatically controlled tune bottom this overflow valve 8 Joint screw 9；Described overflow valve 8 is provided with an oil drain out 10, and this oil drain out 10 is by pipeline 20 even It is connected to a fuel tank 11.

Described inner core 15 is placed in outer barrel 19, if it is installed by a top board 13 and bolt stem 21 On end cap 25.Described helical flow path 17 is contained in inner core 15, itself and U-shaped separation of particles mould Connected by an inner core oil inlet pipe 12 between block 3, specifically, described inner core oil inlet pipe 12 and spiral shell The tangent connection in eddy flow road 17.The fluid of the U-tube 31 pipeline center only small particle microgranule Han trace is logical Cross inner core oil inlet pipe 12 to enter inner core 15 and realize high-precision filtration, thus realize solid particle and separate. Further, described inner core oil inlet pipe 12 is positioned at oil returning tube oil inlet pipe 22, and extends into U-shaped micro- The central authorities of grain separation module 3, its diameter is less than oil returning tube oil inlet pipe 22 diameter, and enters with oil returning tube Oil pipe 22 is coaxially disposed.

Further, the bottom of described inner core 15 is rounding mesa-shaped, and it passes through an inner core oil exit pipe 23 Connecting with oil returning tube 7, inner core oil exit pipe 23 is provided with an automatically controlled check-valves 24.Described inner core 15 Center upright is provided with a hollow cylinder 16, hollow cylinder 16 be arranged over pressure difference indicator 14, should Pressure difference indicator 14 is installed on end cap 25.

Described filter element 18 is arranged on the inwall of inner core 15, and its precision is 1-5 micron.

The bottom of said tub 19 is provided with a hydraulic oil oil-out 5, is incited somebody to action by hydraulic oil oil-out 5 The hydraulic oil filtered is discharged.

In the present invention, due to U-shaped separation of particles module 3, solid particle separation of polymeric in fluid is made With, in the fluid in U-shaped separation of particles module 3 exit, the fluid at the center only small particle Han trace Microgranule, this part fluid is flowed into inner core 15 from inner core oil inlet pipe 12 and carries out high-precision filtration；And manage Fluid near wall is rich in aggregated particles, and this part fluid enters oil return by oil returning tube oil inlet pipe 22 Cylinder 7, then flow back to fuel tank 11 through the oil drain out 10 of overflow valve 8, thus realize solid particle by particle Footpath shunting filtering.Herein, oil returning tube 7 and overflow valve 8 serve aforesaid macrofiltration, thus save Save filter number, reduce system cost and complexity.The automatically controlled set screw 9 of overflow valve 8 For regulating oil pressure relief, its pressure is adjusted to slightly below pressure at filtering outlet, to ensure inner core 15 filtering traffics.

It addition, traditional filter mainly uses cake filtration mode, during filtration, filtrate is perpendicular to filter Element surface flows, and trapped solid particle forms filter cake progressive additive, and the rate of filtration is the most therewith It is gradually reduced, until filtrate stops flowing out, reduces the service life of filter element.In this present invention In, carry in the filtrate of small particle microgranule flows in the way of tangential influent stream from inner core oil inlet pipe 12 The helical flow path 17 of cylinder 15, inner core 15 wall of helical duct 17 side is high-precision filter element 18, filter Liquid is close to filter element 18 surface under the influence of centrifugal force, and filtrate is parallel to the surface of filter element 18 and quickly flows Dynamic, the hydraulic oil after filtration is then perpendicular to filter element 18 surface direction and flows out to urceolus 19, the two stream Dynamic direction is orthogonal staggered, therefore is called cross flow and filters.The quickly flowing of filtrate is to being gathered in The microgranule on filter element 18 surface is applied with shearing and sweeps stream effect, thus inhibits the increase of filter cake thickness, Making rate of filtration near constant, filter pressure also will not raise with the passing of time, making of filter element With the life-span thus increase substantially.Along with the accumulation of filtration time, it is deposited at the bottom of inner core 15 inverted round stage The pollution granule in portion is stepped up, and the rate of filtration slowly declines, unfiltered filtrate edge in inner core 15 The hollow cylinder 16 at center rises, and now, pressure difference indicator 14 works, and monitors the change of its pressure, That is the stopping state of filter element 18 bottom inner core 15, if exceeding threshold value, then regulate automatically controlled set screw 9 reduce oil pressure relief, and open check-valves 24 simultaneously, make bottom inner core 15 containing more pollution granule Filtrate under differential pressure action, be discharged to oil returning tube 7 by inner core oil exit pipe 23, it is to avoid bottom filter element 18 blockage deteriorate, thus extend filter element 18 service life.

The processing step using above-mentioned oil filter to process backflow force feed is as follows:

1), the fluid in fluid pressure line pass through wave filter 8, wave filter 8 decay the height in hydraulic system, In, the fluctuation pressure of low-frequency range, and suppression flowed fluctuation；

2), backflow force feed enters the electrification module 32 of U-shaped separation of particles module 3, makes in fluid Particulate matter is charged, delivers to separation module 33 afterwards；

3), the charged corpuscle in fluid is made to gather to tube wall under the effect of external force by segregation apparatus 33 Closing, the first adsorbent equipment 34 is delivered in oil return afterwards；

4), being adsorbed the magnetic polymeric microgranule in oil return by the first adsorption module 34, oil return afterwards is sent To mechanical centrifugal module 36；

5), magnetic microparticles not to be adsorbed is centrifuged by mechanical centrifugal module 36, and oil return afterwards is sent To the second adsorption module 37；

6), the magnetic polymeric microgranule in the second adsorption module 37 second adsorption oil return；

7), magnetic particle magnetic is eliminated by demagnetization module 35；

8), the fluid of the most U-shaped separation of particles module 3 near-wall passes through oil returning tube oil inlet pipe 22 Being back to fuel tank after entering oil returning tube 7, the fluid of the pipeline center containing trace small particle microgranule then leads to Cross inner core oil inlet pipe 12 to enter inner core 15 and carry out high-precision filtration；

9) fluid, carrying small particle microgranule flows into the spiral flow of inner core 15 in the way of tangential influent stream Road 17, fluid is close to filter core flow under the influence of centrifugal force, and is carried out high-precision filtration；

10), the fluid after high-precision filtration enters urceolus 19, and by the hydraulic oil bottom urceolus 19 Oil-out 5 is discharged.

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. an employing presses down ripple, the defecator electrifying, separate, adsorb and being centrifuged, it is characterised in that: include base plate, wave filter, U-shaped separation of particles module, oil returning tube, inner core, helical flow path, filter element, outer barrel and end cap；Wherein, described wave filter, U-shaped separation of particles module, oil returning tube, outer barrel are sequentially placed on base plate；Described wave filter includes input pipe, shell, outlet tube, elastic thin-wall, H mode filter and cascaded H mode filter；Wherein, described input pipe is connected to one end of shell, and it extends in shell, itself and hydraulic oil inlet docking；Described outlet tube is connected to the other end of shell, and it extends in shell, and itself and U-shaped separation of particles module are docked；Described elastic thin-wall is installed in shell along the radial direction of shell；Described input pipe, outlet tube and elastic thin-wall are collectively forming 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 taper structure changes damping hole is made up of cone shaped elastic damping hole pipe and slot apertures；Resonance series cavity volume I and parallel resonance cavity volume is formed between described elastic thin-wall and shell；The outside of described resonance series cavity volume I sets a resonance series cavity volume II, inserts pipe by a taper and connect between described resonance series cavity volume I and resonance series cavity volume II；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 resonance series cavity volume I and resonance series cavity volume II, and it is also connected with taper structure changes damping hole；Described H mode filter and cascaded H mode filter are axially symmetrical set, and form connection in series-parallel H mode filter；Described U-shaped separation of particles module includes a U-tube, and U-tube is sequentially installed with electrification module, separation module, the first adsorption module, mechanical centrifugal module, the second adsorption module and demagnetization module；The top of described U-shaped separation of particles module and oil returning tube is connected by an oil returning tube oil inlet pipe；Described inner core is placed in outer barrel, if it is installed on end cap by a top board and bolt stem；Described helical flow path is contained in inner core, is connected by an inner core oil inlet pipe between itself and U-shaped separation of particles module；Described inner core oil inlet pipe is positioned at oil returning tube oil inlet pipe, and extends into the central authorities of U-shaped separation of particles module, and its diameter is less than oil returning tube oil inlet pipe diameter, and and oil returning tube oil inlet pipe be coaxially disposed；Described filter element is arranged on the inwall of inner core, and its precision is 1-5 micron；The bottom of said tub is provided with a hydraulic oil oil-out.

2. as claimed in claim 1 employing presses down ripple, the defecator electrifying, separate, adsorb and being centrifuged, it is characterised in that: the axis of described input pipe and outlet tube is the most on the same axis；The wider place of described taper structure changes damping hole opening is positioned at resonance series cavity volume I and parallel resonance cavity volume, and its taper angle is 10 °；The Young's modulus of described taper structure changes damping hole cone shaped elastic damping hole pipe is bigger than the Young's modulus of elastic thin-wall, can be with change in fluid pressure stretching or compression；The Young's modulus of slot apertures is bigger than the Young's modulus of cone shaped elastic damping hole pipe, can be with fluid opened by pressure or closedown；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 °.

3. as claimed in claim 1 employing presses down ripple, the defecator electrifying, separate, adsorb and being centrifuged, it is characterised in that: described electrification module includes some electrodes and an electrode controller；Described some electrodes are installed on the first oil return pipe, and it is respectively connecting to electrode controller.

4. as claimed in claim 1 employing presses down ripple, the defecator electrifying, separate, adsorb and being centrifuged, it is characterized in that: described separation module uses uniform magnetic field separation module, and this uniform magnetic field separation module includes aluminum matter pipeline, two magnetic poles and magnetic pole controller；Wherein, said two magnetic pole is separately positioned on aluminum matter pipeline, the opposite polarity of these two magnetic poles, and in being oppositely arranged；Said two magnetic pole is respectively and electrically connected on magnetic pole controller.

5. as claimed in claim 1 employing presses down ripple, the defecator electrifying, separate, adsorb and being centrifuged, it is characterized in that: described separation module uses rotating excitation field separation module, and this rotating excitation field separation module includes aluminum matter pipeline, iron shell, three-phase symmetric winding and three-phase symmetrical current module；Described three-phase symmetric winding is wound on outside aluminum matter pipeline；Described iron shell is coated on aluminum matter pipeline；Described three-phase symmetrical current module connects described three-phase symmetric winding.

6. as claimed in claim 1 employing presses down ripple, the defecator electrifying, separate, adsorb and being centrifuged, it is characterized in that: described separation module uses helical pipe magnetic field separation module, and this helical pipe magnetic field separation module includes aluminum matter helical pipe, solenoid and solenoid control circuit；Wherein, described aluminum matter helical pipe is arranged in solenoid；Described solenoid and solenoid control circuit are electrically connected with.

7. as claimed in claim 1 employing presses down ripple, the defecator electrifying, separate, adsorb and being centrifuged, it is characterized in that: described first adsorption module and second is inhaled adsorption module and used 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.

8. as claimed in claim 1 employing presses down ripple, the defecator electrifying, separate, adsorb and being centrifuged, it is characterized in that: described first adsorption module and second is inhaled adsorption module and used 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 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.

9. the employing described in claim 1 presses down ripple, the defecator electrifying, separate, adsorb and being centrifuged, 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.

10. the employing described in claim 1 presses down ripple, the defecator electrifying, separate, adsorb and being centrifuged, it is characterised in that: the bottom of described oil returning tube is provided with an overflow valve, is provided with an automatically controlled set screw bottom this overflow valve；Described overflow valve is provided with an oil drain out, and this oil drain out is connected to a fuel tank by pipeline；The bottom of described inner core is rounding mesa-shaped, and it is connected by an inner core oil exit pipe and oil returning tube, and inner core oil exit pipe is provided with an automatically controlled check-valves；The center upright of described inner core is provided with a hollow cylinder, hollow cylinder be arranged over pressure difference indicator, this pressure difference indicator is installed on end cap；Described inner core oil inlet pipe and the tangent connection of helical flow path.