CN105971998A - Oil filtering method adopting full-band working condition self-adaptive filtering, electrification and centrifugation - Google Patents

Abstract

The invention relates to an oil filtering method adopting full-band working condition self-adaptive filtering, electrification and centrifugation. The pressure/flow pulsation of hydraulic oil is attenuated through a filter, and the full-band working condition self-adaptive filter is adopted. Separation of solid particles is achieved through a U-shaped particle separation module; the solid particles in the oil are made to move towards the tube wall, enter an oil return barrel through an oil return barrel oil inlet tube and then flow back to an oil tank; the oil, containing trace small-grain-size particles, in the center of a pipeline enters an inner barrel through an inner barrel oil inlet tube so as to be subjected to high-precision filtering, and the service life of a filter element is prolonged; the oil entering the inner barrel oil inlet tube flows into a spiral flow channel of the inner barrel in a tangential inflow mode, the inner barrel wall serves as the filter element, filter liquor flows closely along the filter element under the action of centrifugal force, the filter liquor quickly flows in parallel to the surface of the filter element, and the filtered hydraulic oil flows out to an outer barrel in the direction perpendicular to the surface of the filter element; and pollution particles settled at the bottom of the inner barrel can be discharged to the oil return barrel through an electrically controlled check valve regularly, so that the service life of the filter element is prolonged.

Description

A kind of use full frequency band operating mode adaptive-filtering, the oil strain method electrifying and being centrifuged

[technical field]

The present invention relates to a kind of hydraulic oil filtering method, be specifically related to a kind of employing full frequency band operating mode adaptive-filtering, rise Electricity and centrifugal oil strain method, belong to technical field of hydraulic equipment.

[background technology]

Statistics both domestic and external show, the fault of hydraulic system about 70%～85% is owing to oil contamination causes 's.Solid particle is then the pollutant the most universal in oil contamination, damaging effect is maximum.The liquid caused by solid grain contamination The pressure system failure accounts for the 70% of gross contamination fault.In particulate pollutant in hydraulic system oil liquid, metal filings accounting exists Between 20%～70%.Adopt an effective measure the solid grain contamination filtering in fluid, be the pass of Pollution Control in Hydraulic System Key, is also the Reliable guarantee of system safety operation.

Filter is the key element that hydraulic system filters solid grain contamination.Solid particle pollution in hydraulic oil Thing, outside the precipitable a part of larger particles of oil removal box, filters mainly by oil-filtering apparatus.Especially high pressure filtering device, mainly It is used for filtering the hydraulic oil of flow direction control valve and hydraulic cylinder, to protect the Hydraulic Elements of this kind of contamination resistance difference, therefore to liquid The cleannes of force feed require higher.

But, the high pressure filter that existing hydraulic system uses has the disadvantage that (1) all kinds of Hydraulic Elements are to fluid Cleannes require different, the size of the solid particle in fluid is the most different, for this need in hydraulic system Diverse location install multiple dissimilar wave filter, thus bring cost and install complexity problem；(2) hydraulic system In filter mainly use cake filtration mode, during filtration filtrate be perpendicular to filter element surface flowing, trapped solid Microgranule forms filter cake progressive additive, and the rate of filtration is gradually reduced the most therewith until filtrate stops flowing out, and reduces filter element Service life.

Therefore, for solving above-mentioned technical problem, the employing full frequency band operating mode self adaptation filter of a kind of innovation of necessary offer Ripple, the oil strain method electrifying 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, adaptability and integration Height, service life length use full frequency band operating mode adaptive-filtering, the oil strain method that electrifies and be centrifuged.

For achieving the above object, the technical scheme that the present invention takes is: one uses full frequency band operating mode adaptive-filtering, rises Electricity and centrifugal oil strain method, it uses a kind of oil filter, this oil filter 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 return Cylinder, 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, itself and hydraulic oil inlet docking；Described outlet tube Being connected to the other end of shell, itself and U-shaped separation of particles module are docked；Described elastic thin-wall is installed on shell along the radial direction of shell In；Described input pipe, outlet tube and elastic thin-wall are collectively forming a c-type cavity volume wave filter；The axial of described elastic thin-wall goes up all Even have some taper structure changes damping holes；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；Outside described resonance series cavity volume I Side sets a resonance series cavity volume II, by some uniform arrangements between described resonance series cavity volume I and resonance series cavity volume II Pipe connection is inserted in taper；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 connected with taper structure changes damping hole Logical；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 micro- Grain separation module include a U-tube, U-tube is sequentially installed with electrification module, separation module, the first adsorption module, machinery from Core module, the second adsorption module and demagnetization module；The top of described U-shaped separation of particles module and oil returning tube is entered by an oil returning tube Oil pipe connects；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 It 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 back In oil cylinder oil inlet pipe, and extending into the central authorities of U-shaped separation of particles module, its diameter is less than oil returning tube oil inlet pipe diameter, and and returns Oil cylinder oil inlet pipe is 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 It is provided with a hydraulic oil oil-out；

It comprises the steps:

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

2), backflow force feed enters the electrification module of U-shaped separation of particles module, makes the particulate matter in fluid charged, it After deliver to separation module；

3), making the charged corpuscle in fluid be polymerized to tube wall under the effect of external force by segregation apparatus, oil return afterwards is sent To the first adsorbent equipment；

4), by the magnetic polymeric microgranule in the first adsorption module absorption oil return, mechanical centrifugal module is delivered in oil return afterwards；

5), magnetic microparticles not to be adsorbed is centrifuged by mechanical centrifugal module, and the second adsorption module is delivered in oil return afterwards；

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

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

8), the fluid of the most U-shaped separation of particles module near-wall refluxes after entering oil returning tube by oil returning tube oil inlet pipe To fuel tank, the fluid of the pipeline center containing trace small particle microgranule then enters inner core by inner core oil inlet pipe and carries out high-precision spending Filter；

9), the fluid carrying small particle microgranule flows into the helical flow path of inner core in the way of tangential influent stream, and fluid is centrifugal It is close to filter core flow under the effect of power, and carries out high-precision filtration；

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

The present invention uses full frequency band operating mode adaptive-filtering, electrifies and the oil strain method that is centrifuged is further: described defeated Enter the axis of pipe and outlet tube the most on the same axis；The wider place of described taper structure changes damping hole opening is positioned at resonance series and holds In chamber I and parallel resonance cavity volume, its taper angle is 10 °；The Young of described taper structure changes damping hole cone shaped elastic damping hole pipe The Young's modulus of modular ratio elastic thin-wall wants big, can be with change in fluid pressure stretching or compression；The Young's modulus of slot apertures compares taper The Young's modulus of elastic damping hole pipe wants big, can be with fluid opened by pressure or closedown；Position, tube opening wider place is inserted in described taper In resonance series cavity volume II, its taper angle is 10 °；The position that pipe and taper structure changes damping hole are inserted in described taper is the most wrong Open.

The present invention uses full frequency band operating mode adaptive-filtering, electrifies and the oil strain method that is centrifuged is further: described Electricity module includes some electrodes and an electrode controller；Described some electrodes are installed on the first oil return pipe, and it connects respectively To electrode controller.

The present invention uses full frequency band operating mode adaptive-filtering, electrifies and the oil strain method that is centrifuged is further: described point Using uniform magnetic field separation module from module, this uniform magnetic field separation module includes aluminum matter pipeline, two magnetic poles and magnetic pole control Device processed；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.

The present invention uses full frequency band operating mode adaptive-filtering, electrifies and the oil strain method that is centrifuged is further: described point From module use rotating excitation field separation module, this rotating excitation field separation module include aluminum matter pipeline, iron shell, three-phase symmetrical around Group 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 On pipeline；Described three-phase symmetrical current module connects described three-phase symmetric winding.

The present invention uses full frequency band operating mode adaptive-filtering, electrifies and the oil strain method that is centrifuged is further: described point Using helical pipe magnetic field separation module from module, 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 is electrically connected with.

The present invention uses full frequency band operating mode adaptive-filtering, electrifies and the oil strain method that is centrifuged is further: described the One adsorption module and second is inhaled adsorption module and is 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 be respectively arranged in In aluminium ring shape pipeline, both are connected with electric current in opposite direction so that forward solenoid and reverse solenoid adjacent produce same Property magnetic 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.

The present invention uses full frequency band operating mode adaptive-filtering, electrifies and the oil strain method that is centrifuged is further: described the One adsorption module and second is inhaled adsorption module and is used the homopolarity adjacent type absorbing ring of charged hammer, and the homopolarity of this charged hammer is adjacent Type absorbing ring includes aluminium ring shape pipeline, forward solenoid, reverse solenoid, irony magnetic conduction cap, dividing plate, electric shock hammer and electromagnetism Ferrum；Described forward solenoid and reverse solenoid are respectively arranged in aluminium ring shape pipeline, and both are connected with electric current in opposite direction, Forward solenoid and reverse solenoid adjacent is made to produce like pole；Described irony magnetic conduction cap is arranged in aluminium ring shape pipeline Inwall on, it is positioned at forward solenoid and reverse solenoid adjacent and forward solenoid and reverse solenoid axis Intermediate point；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.

The present invention uses full frequency band operating mode adaptive-filtering, electrifies and the oil strain method that is centrifuged is further: described machine Tool is centrifuged module and uses eddy flow to be centrifuged module；Described eddy flow is centrifuged module and includes eddy flow tube wall, the first flow deflector, the second water conservancy diversion Sheet, motor and flow transducer；Wherein, described first flow deflector is provided with 3, and these 3 first flow deflectors are along tube wall Circumference is uniformly distributed every 120 °, and its laying angle is set to 18 °；Described second flow deflector and the first flow deflector structure are identical, and it is arranged After the first flow deflector, and and the first flow deflector stagger 60 ° and be connected in tube wall, its laying angle is set to 36 DEG C；Described first leads The long limit of flow is connected with tube wall, and minor face extends along the axis of tube wall；Its leading edge frustrates into obtuse, and trailing edge is processed into wing, and it is high Degree is 0.4 times of tube wall diameter, 1.8 times of a length of tube wall diameter；Described motor connect and drive the first flow deflector and Second flow deflector, to regulate laying angle；Described flow transducer is arranged on the central authorities in tube wall.

The present invention uses full frequency band operating mode adaptive-filtering, electrifies and the oil strain method that is centrifuged is also: described oil returning tube Bottom be provided with an overflow valve, be provided with an automatically controlled set screw bottom this overflow valve；Described overflow valve is provided with an oil drain out, should Oil drain out is connected to a fuel tank by pipeline；The bottom of described inner core is rounding mesa-shaped, and it passes through inner core oil exit pipe and an oil return Cylinder connects, 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 company of helical flow path Connect.

Compared with prior art, there is advantages that

1. pulsed by the pressure/flow of filter attenuation hydraulic oil, make filter element not vibrate, to improve Strainability；Hydraulic oil realizes the separation of solid particle in U-shaped separation of particles module, makes the solid particle in fluid to tube wall Motion, at U-shaped separation of particles module outlet, the fluid rich in the near-wall of solid particle is entered by oil returning tube oil inlet pipe Fuel tank it is back to, in only the fluid of the pipeline center containing trace small particle microgranule is then entered by inner core oil inlet pipe after oil returning tube Cylinder carries out high-precision filtration, improves the service life of filter element, reduces filtering cost and complexity；Enter inner core oil inlet pipe Fluid flows into the helical flow path of inner core in the way of tangential influent stream, and inner tube wall is filter element, then filtrate is the tightest Patch filter core flow, filtrate is parallel to the surface of filter element and quickly flows, and the hydraulic oil after filtration is then perpendicular to cartridge surface direction stream Going out to urceolus, the microgranule of cartridge surface is implemented to sweep stream effect by this cross flow filter type, it is suppressed that the increase of filter cake thickness, It is deposited on the pollution granule bottom inner core and regularly can be discharged to oil returning tube by automatically controlled check-valves, thus improve filter element and use the longevity Life.

2. by making the particulate matter charged polymeric in fluid to electrode applying voltage, and promote colloidal particles decomposition to disappear Melt；Efficient absorption is formed by adsorption module；Mechanical centrifugal is utilized " to be separated " and gather tube wall by the molecule in fluid Near, capture molecule with adsorbent equipment；Avoid endangering Hydraulic Elements to residual particles demagnetization by degaussing gear, so that In fluid, solid particle is gathered into bulky grain and moves to near-wall.

3. the generation of non-uniform magnetic-field that magnetization needs, need multipair forward and reverse coil to and pass through different size of electric current, And current values can numeral set online.

[accompanying drawing explanation]

Fig. 1 be the present invention use full frequency band operating mode adaptive-filtering, the structural representation of oil filter electrifying and being centrifuged.

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 c-type cavity volume 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 is the structural representation that the first adsorption module (the second adsorption module) is homopolarity adjacent type absorbing ring in Figure 11 Figure.

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

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]

Referring to shown in Figure of description 1 to accompanying drawing 19, the present invention is a kind of employing full frequency band operating mode adaptive-filtering, rises Electricity and centrifugal oil filter, 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, several parts such as filter element 18, outer barrel 19 and end cap 25 composition.Wherein, described wave filter 8, U-shaped separation of particles module 2, oil return Cylinder 7, outer barrel 19 are sequentially placed on base plate 6.

Described wave filter 8 is for inputting hydraulic oil, and the pulsation pressure of the high, medium and low frequency range that can decay in hydraulic system Power, and suppression flowed fluctuation.Described wave filter 8 is by input pipe 81, shell 88, outlet tube 89, elastic thin-wall 87, H mode filter 812 and several parts such as cascaded H mode filter 813 composition.

Wherein, described input pipe 81 is connected to one end of shell 89, and itself and a hydraulic oil inlet 1 are docked；Described outlet tube 811 other ends being connected to shell 89, itself and U-shaped separation of particles module 3 are docked.Described elastic thin-wall 87 is pacified along the radial direction of shell It is loaded in shell 88.The axis of described input pipe 81 and outlet tube 89 the most on the same axis, so can improve more than 10% Filter effect.

Described input pipe 81, outlet tube 89 and elastic thin-wall 87 are collectively forming a c-type cavity volume wave filter, thus hydraulic pressure of decaying System high-frequency pressure fluctuation.The filter transmission coefficient obtained after processing by lumped-parameter method is:

$\mathrm{\γ}=\frac{1}{1+{(\frac{2\mathrm{\π}f}{Z}\·\frac{S_V{L}_V}{S_{I}a})}^2}$

Velocity of sound L in a medium_VC-type cavity volume length S_VC-type cavity volume volume Z characteristic impedance

γ transmission coefficient f pressure oscillation frequency S_IInput pipe cross-sectional area.

From above formula, c-type wave filter is similar with the electric capacity effect in circuit.The pressure pulse wave of different frequency is by being somebody's turn to do During wave filter, transmission coefficient is different with frequency.Frequency is the highest, then transmission coefficient is the least, and this shows the pressure pulse wave of high frequency Decay the most severe when device after filtering, thus serve the effect eliminating high frequency pressure pulsations.

The design principle of described c-type cavity volume wave filter is as follows: when in pipeline, the fluctuating frequency of pressure is higher, and the pressure of fluctuation is made It is used in convection cell on fluid and produces pinch effect.When the flow of change enters c-type cavity volume by input pipe, liquid stream exceedes averagely Flow, the cavity volume of expansion can absorb unnecessary liquid stream, and releases liquid stream when less than average discharge, thus absorption pressure pulsating energy Amount.

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

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

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

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

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

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

The design principle of described elastic thin-wall 87 is as follows: when producing intermediate frequency pressure fluctuation in pipeline, c-type cavity volume is to pressure wave Dynamic damping capacity is more weak, flows into the periodically pulsing pressure continuous action of wave filter c-type cavity volume on elastic thin-wall 87.Elastic Thin-walled then does periodic vibration by the frequency of fluctuation pressure, and this forced vibration consumes the pressure fluctuation energy of fluid, thus real Existing Mid Frequency pressure filtering.From the principle of virtual work, elastic thin-wall consumes ability and its forced oscillation of fluid pulsation pressure energy Potential energy and kinetic energy sum time dynamic are directly related, and in order to improve Mid Frequency filtering performance, the radial design of elastic thin-wall is long-range In pipe radius, and the thickness of thin-walled is less, and representative value is less than 0.1mm.

Further, form resonance series cavity volume I84 between described elastic thin-wall 87 and shell 88 and parallel resonance is held Chamber 85.The outside of described resonance series cavity volume I84 sets a resonance series cavity volume II83, described resonance series cavity volume I84 and series connection Inserting pipe 82 by the taper of some uniform arrangements between resonance cavity volume II83 to connect, the wider place of pipe 82 opening is inserted in described taper Being positioned at resonance series cavity volume II83, its taper angle is 10 °.Uniformly have some tapers in the axial direction of described elastic thin-wall 87 to become Structural damping hole 86, taper structure changes damping hole 86 and taper are inserted the position of pipe 82 and are mutually staggered.

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

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

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, and it also and is bored Deformation structure damping hole 86 is connected.After processing by lumped-parameter method, two natural angular frequencies of cascaded H mode filter 813 are:

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

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

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

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

Described H mode filter 812 and cascaded H mode filter 813 are axially symmetrical set, and form the filtering of connection in series-parallel H type Device, for broadening frequency filtering scope and make overall structure more compact.The multiple connection in series-parallel H types of the present invention circumferentially interface distributions Wave filter (only depicts 2) in figure, separate with dividing plate 20 each other, and the resonance bands of these multiple wave filter is different, Whole medium and low frequency filtering frequency range can be covered, it is achieved the entire spectrum filtering of medium and low frequency section after combining comprehensively.

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

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

The present invention can also the pulsation decay of solid line operating mode self-adaptive pressure.When hydraulic system working conditions change, both executive components Suddenly stop or running, and when the opening of valve changes, the characteristic impedance of pipe-line system can be caused to undergo mutation, so that former pipe Pressure curve with change in location in time in road changes the most therewith, then the position of pressure peak also changes.Due to the present invention The axial length of wave filter be designed as pulsing wavelength, and the connection in series-parallel H mode filter group of wave filter more than system main pressure Cavity volume length, the length of c-type cavity volume wave filter and the length of elastic thin-wall and wave filter axial length equal, it is ensured that pressure Peak is constantly in the effective range of wave filter；And the taper structure changes damping hole of connection in series-parallel H mode filter is opened On elastic thin-wall, it is uniformly distributed in the axial direction, resonates cavity volume 1 with the cavity volume 2 that resonates by multiple axial equally distributed identical The taper resonantron of parameter is connected, and mutually stagger in conical damping hole and taper resonantron position so that pressure peak change in location The performance of wave filter is had little to no effect, it is achieved thereby that operating mode adaptive-filtering function.In view of three kinds of filter structure axles Suitable to size and wave filter, this bigger size also ensure that hydraulic filter possesses stronger pressure fluctuation decay energy Power.

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

1), hydraulic fluid enters c-type cavity volume wave filter by input pipe, and the cavity volume of expansion absorbs unnecessary liquid stream, completes height The filtering of pressure fluctuation frequently；

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

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

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

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

Described U-shaped separation of particles module 3 includes a U-tube 31, U-tube 31 is sequentially installed with electrification module 32, separates Module the 33, first adsorption module 34, mechanical centrifugal module the 36, second adsorption 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 an electrode control Device 322 processed forms.Described some electrodes 321 are installed in U-tube 31, and it is respectively connecting to electrode controller 252.Described electrode Controller 322 is electrically connected with and applies voltage to electrode 321, makes the particulate matter in fluid charged.

Described separation module 33 makes poly-being incorporated under centrifugal action of particle charge that quality is bigger get rid of to cavity wall, and it can be adopted By uniform magnetic field separation module, rotating excitation field separation module or helical pipe magnetic field separation module.

When described separation module 33 uses uniform magnetic field separation module, its by 331, two magnetic poles 332 of aluminum matter pipeline and Magnetic pole controller 333 forms.Wherein, said two magnetic pole 332 is separately positioned on aluminum matter pipeline 331, these two magnetic poles 332 Opposite polarity, 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 uniform magnetic field with speed V and separates Module 33, two magnetic poles 332 of uniform magnetic field separation module 33 produce the uniform magnetic field vertical with speed V direction, according to left hand Rule, then charged particle in uniform magnetic field separation module 33 by being perpendicular to the Loulun magnetism of velocity attitude and magnetic direction Effect, this power does not change the speed of charged particle, and it only changes the direction of motion of charged particle, makes charged particle at the work of this power With the lower vessel wall motion to aluminum matter pipeline 331, so that the granule in fluid " separates " out from fluid, assemble to tube wall, It is easy to subsequent adsorbtion capture.Owing to fluid has certain viscosity, granule during vessel wall motion also by viscous drag Effect.In order to ensure separating effect, need to regulate magnetic field intensity B and make the granule of distance tube wall farthest can be at the work of separation module Moving at tube wall within the time, 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, a diameter of D of separation module, length For 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

The radius v charged particle movement velocity of η hydraulic pressure oil viscosity r charged particle

It not general, it is assumed that the granule in fluid has reached stable state when entering separation module, then charged particle is by dividing Can approximate from the time of 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, iron shell 334, three-phase The parts compositions such as symmetric winding 335 and three-phase symmetrical current module 336.Described three-phase symmetric winding 335 is wound on aluminum matter pipeline Outside 331.Described iron shell 334 is coated on aluminum matter 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 rotating excitation field with speed V and separates Module 33, three-phase symmetrical current module 336 makes to flow through in three-phase symmetric winding 335 three-phase symmetrical electric current, and this electric current is at aluminum matter pipe Producing rotating excitation field in road 331, charged particle is subject to be perpendicular to the Lip river of velocity attitude and magnetic direction under rotating excitation field effect The effect of logical sequence magnetic force, this power does not change the speed of charged particle, and it only changes the direction of motion of charged particle, makes charged particle exist Spirally advance under the effect of this power, and to vessel wall motion.Reasonable adjusting magnetic field intensity can make the granule in fluid from oil Liquid " separates " out, is gathered in near-wall, it is simple to subsequent adsorbtion captures.Owing to fluid has certain viscosity, granule to Also acted on by viscous drag during vessel wall motion.In order to ensure separating effect, need to make on aluminum matter pipeline 331 axis Microgranule can move at tube wall within the action time of separation module, and 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, a diameter of D of separation module, length For 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

The radius v charged particle movement velocity of η hydraulic pressure oil viscosity r charged particle

Assuming that the granule in fluid has reached stable state, the then charged particle time by separation module when entering separation 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 helical pipe 338 is arranged in solenoid 339.Described spiral shell Spool 339 and solenoid control circuit 336 are electrically connected with.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 fluid of charged particle along aluminum matter spiral Pipeline 338 advances, thus produces at pipeline exit and have the eddy flow of certain spin direction, the charged particle of heavier mass along with Fluid rotates, and produces the radial motion to tube wall under the influence of centrifugal force；Simultaneously as the entrance of aluminum matter helical pipe 338 Direction is vertical with the axial magnetic field direction of energization solenoid 339, and the charged particle entering aluminum matter helical pipe 338 with speed v is subject to To the effect of Loulun magnetism, direction is perpendicular to magnetic direction and the Way in of aluminum matter helical pipe 338.Loulun magnetism makes charged Granule is spinned forward travel in pipeline, owing to the Way in of aluminum matter helical pipe 338 and magnetic direction are close to vertical, and band Electricity granule mainly rotates in a circumferential direction motion, and fluid is the most unaffected, thus realizes granule " separation " from fluid, in order to reality The now absorption to granule.For ensureing " separation " effect, need to make the microgranule on aluminum matter conduit 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 carried charge is q, a diameter of D of aluminum matter helical pipe, aluminum matter helical pipe The number of turn be n, the angle in the Way in of aluminum matter helical pipe and the axial magnetic field direction of energization solenoid is θ, solenoid circle Number is N, and electric current is I, and magnetic field intensity is B, and permeability of vacuum 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

The radius v charged particle movement velocity of η hydraulic pressure oil viscosity r charged particle

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

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

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 for adsorbing the big microgranule of magnetic polymeric after separated module 33 separates, and it can use Homopolarity adjacent type absorbing ring, this homopolarity adjacent type absorbing ring is by aluminium ring shape pipeline 341, forward solenoid 342, reverse solenoid 343 and the parts such as 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 are adjacent Place produces like pole.Described irony magnetic conduction cap 344 is arranged on the inwall of aluminium ring shape pipeline 341, and it is positioned at forward helical Pipe 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, reverse solenoid 343, phase Adjacent forward solenoid 342, reverse solenoid 343 are connected with electric current in opposite direction so that forward solenoid 342, reverse helical Pipe 343 adjacent produces like pole；Meanwhile, aluminium ring shape pipeline 341 can improve magnetic circuit, strengthens the magnetic field at inner-walls of duct Intensity, strengthens the irony 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 absorbing ring of charged hammer, and this is charged The homopolarity adjacent type absorbing ring of hammer is by aluminium ring shape pipeline 341, forward solenoid 342, reverse solenoid 343, irony magnetic conduction The parts compositions such as cap 344, dividing plate 345, electric shock hammer 346 and electric magnet 347.Wherein, described forward solenoid 342 and reverse spiral shell Spool 343 is respectively arranged in aluminium ring shape pipeline 341, and both are connected with electric current in opposite direction so that forward solenoid 342 is with anti- Like pole is produced to solenoid 343 adjacent.Described irony magnetic conduction cap 344 is arranged on the inwall of aluminium ring shape pipeline 341, It is positioned at forward solenoid 342 and reverse solenoid 343 adjacent and forward solenoid 342 and reverse solenoid 343 axis Intermediate point.Described electric shock hammer 346 and electric magnet 347 are between dividing plate 345.Described electric magnet 347 connects and can promote electricity Hammer 346, makes 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 spiral shell Spool 343, adjacent forward solenoid 342, reverse solenoid 343 are connected with electric current in opposite direction so that forward solenoid 342, reverse solenoid 343 adjacent produces like pole；Meanwhile, aluminium ring shape pipeline 341 can improve magnetic circuit, strengthens pipeline Magnetic field intensity at inwall, strengthens the irony magnetic conduction cap 344 capture absorbability to granule.Each forward solenoid 342, reverse spiral shell Spool 343 electric current can be different with concentration and change, to obtain optimal adsorption performance according to the size of granule.And by electric shock The setting of hammer 346, prevents granule bulk deposition at irony magnetic conduction cap 344, affects adsorption effect.Now, by electric magnet 347 Control the inwall of electric shock hammer 346 percussion pipeline 341 so that adsorbed granule scatter to both sides.Meanwhile, pipeline is being cleaned When 341, the percussion of electric shock hammer 346 can also improve cleaning performance.

Described first adsorption module 34 is designed to U-shaped, and when fluid enters U-shaped absorption pipeline, granule is at gravity, centrifugal force Effect under, to side, tube wall moves, and plus magnetic field force effect, moves radially speed and accelerates, and the efficiency of granular absorption is able to Improve；Fluid leave U-shaped absorption pipeline rise time, transport so that the direction that granule is diagonally lower gravity and magnetic field force with joint efforts Dynamic, extend the 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 be thrown toward under the action of the centrifugal Tube wall.Described mechanical centrifugal module 36 selects eddy flow to be centrifuged module 36, and this eddy flow is centrifuged module 36 and uses the mode of energy loss, Its design principle is as follows: arranges the flow deflector of the distortion of certain altitude and length in the duct, and makes blade face tangent line become with axis Certain angle, can make fluid produce spiral flow in pipes because pipe flow border changes, and this spiral flow can be analyzed to the week around pipe axle To flowing and axial straight flowing, the particulate matter carried in fluid produces off-axis alignment heart screw.This eddy flow centrifugal device 36 is several by eddy flow tube wall the 361, first flow deflector the 362, second flow deflector 363, motor 364 and flow transducer 365 etc. Part composition.

Wherein, described first flow deflector 362 is provided with 3, these 3 first flow deflectors 362 along tube wall 361 inner periphery every 120 ° Being uniformly distributed, its laying angle (angle between the first flow deflector 362 and eddy flow tube wall 361) is set to 18 °, optimal tangential to ensure Flowing.Described second flow deflector 363 is identical with the first flow deflector 362 structure, after it is arranged on the first flow deflector 362, and and the One flow deflector 362 staggers 60 ° and is connected in tube wall 361, and its laying angle is set to 36 DEG C, is used for reducing resistance and strengthening circumferential flow Intensity.It addition, the 3rd or more flow deflector can be arranged the most again according to actual separation effect, laying angle gradually increases.Institute State motor 364 connect and drive the first flow deflector 362 and the second flow deflector 363, to regulate laying angle, thus can obtain more Good centrifugal effect, knows and makes flow deflector 362,363 adapt to different operating modes.Described flow transducer 365 is arranged on tube wall 361 Interior central authorities, by the numerical analysis cyclonic separation effect of reading flow quantity sensor 365, and control motor 364, step accordingly Enter motor 364 and regulate 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, and function is the most identical with the mechanism of action, 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 entering hydraulic pressure by oil returning tube oil inlet pipe Loop, sensitive to pollution Hydraulic Elements cause damage.

The top of described U-shaped separation of particles module 3 and oil returning tube 7 is connected by an oil returning tube oil inlet pipe 22；By U-shaped micro- After grain separation module 3 processes, the fluid of U-tube 31 near-wall, rich in aggregated particles, is entered back by oil returning tube oil inlet pipe 22 It is back to fuel tank after oil cylinder 7.

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

Described inner core 15 is placed in outer barrel 19, if it is installed on end cap 25 by a top board 13 and bolt stem 21.Institute State helical flow path 17 to be contained in inner core 15, connected by an inner core oil inlet pipe 12 between itself and U-shaped separation of particles module 3, tool Saying of body, described inner core oil inlet pipe 12 and the tangent connection of helical flow path 17.The fluid of the U-tube 31 pipeline center only granule Han trace Footpath microgranule, enters inner core 15 by inner core oil inlet pipe 12 and realizes 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 the central authorities of U-shaped separation of particles module 3, its diameter Less than oil returning tube oil inlet pipe 22 diameter, and it is coaxially disposed with oil returning tube oil inlet pipe 22.

Further, the bottom of described inner core 15 is rounding mesa-shaped, and it is connected by an inner core oil exit pipe 23 and oil returning tube 7 Connecing, inner core oil exit pipe 23 is provided with an automatically controlled check-valves 24.The center upright of described inner core 15 is provided with a hollow cylinder 16, hollow Cylinder 16 be arranged over pressure difference indicator 14, this 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, the hydraulic oil that will have been filtered by hydraulic oil oil-out 5 Discharge.

In the present invention, owing to U-shaped separation of particles module 3 is to solid particle separation of polymeric effect in fluid, at U-shaped microgranule In the fluid in separation module 3 exit, the fluid at the center only small particle microgranule Han trace, this part fluid is from inner core oil inlet pipe 12 It is flowed into inner core 15 and carries out high-precision filtration；And the fluid of near-wall is rich in aggregated particles, this part fluid passes through oil returning tube Oil inlet pipe 22 enters oil returning tube 7, then flows back to fuel tank 11 through the oil drain out 10 of overflow valve 8, thus realizes solid particle by particle Footpath shunting filtering.Herein, oil returning tube 7 and overflow valve 8 serve aforesaid macrofiltration, thus save filter number, fall Low system cost and complexity.The automatically controlled set screw 9 of overflow valve 8 is used for regulating oil pressure relief, is adjusted to by its pressure slightly Less than pressure at filtering outlet, to ensure inner core 15 filtering traffic.

It addition, traditional filter mainly uses cake filtration mode, during filtration, filtrate is perpendicular to filter element surface stream Dynamic, trapped solid particle forms filter cake progressive additive, and the rate of filtration is gradually reduced the most therewith, until filtrate stops stream Go out, reduce the service life of filter element.In this present invention, carry the filtrate of small particle microgranule from inner core oil inlet pipe 12 Flowing into the helical flow path 17 of inner core 15 in the way of tangential influent stream, inner core 15 wall of helical duct 17 side is high-precision filter element 18, filtrate 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, after filtration Hydraulic oil is then perpendicular to filter element 18 surface direction and flows out to urceolus 19, and the direction of the two flowing is orthogonal staggered, therefore claims it Filter for cross flow.The quickly flowing of filtrate is applied with shearing to the microgranule being gathered in filter element 18 surface and sweeps stream effect, thus presses down Having made the increase of filter cake thickness so that rate of filtration near constant, filter pressure also will not raise with the passing of time, filter element Service life thus increase substantially.Along with the accumulation of filtration time, it is deposited on the pollution granule bottom inner core 15 inverted round stage Being stepped up, the rate of filtration slowly declines, and in inner core 15, unfiltered filtrate rises along the hollow cylinder 16 at center, now, and 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 and reduce oil pressure relief, and open check-valves 24 simultaneously, make bottom inner core 15 containing more pollution granule Filtrate is discharged to oil returning tube 7 by inner core oil exit pipe 23 under differential pressure action, it is to avoid bottom, filter element 18 blockage deteriorates, from And 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 passes through wave filter 8, the high, medium and low frequency range that wave filter 8 is decayed in hydraulic system Fluctuation pressure, and suppression flowed fluctuation；

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

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

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

5), magnetic microparticles not to be adsorbed is centrifuged by mechanical centrifugal module 36, and the second absorption mould is delivered in oil return afterwards Block 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) after, the fluid of the most U-shaped separation of particles module 3 near-wall enters oil returning tube 7 by oil returning tube oil inlet pipe 22 Being back to fuel tank, the fluid of the pipeline center containing trace small particle microgranule then enters inner core 15 by inner core oil inlet pipe 12 to be carried out High-precision filtration；

9), the fluid carrying small particle microgranule flows into the helical flow path 17 of inner core 15 in the way of tangential influent stream, and fluid exists It is close to filter core flow under the effect of centrifugal force, and carries out high-precision filtration；

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

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

Claims (10)

1. one kind uses full frequency band operating mode adaptive-filtering, the oil strain method electrifying and being centrifuged, it is characterised in that: it uses one Oil filter, this oil filter includes 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 Including input pipe, shell, outlet tube, elastic thin-wall, H mode filter and cascaded H mode filter；Wherein, described input pipe is even It is connected to one end of shell, itself and hydraulic oil inlet docking；Described outlet tube is connected to the other end of shell, itself and U-shaped microgranule Separation module docks；Described elastic thin-wall is installed in shell along the radial direction of shell；Described input pipe, outlet tube and elastic thin-wall It is collectively forming a c-type cavity volume wave 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；Series connection is formed altogether between described elastic thin-wall and shell Shake cavity volume I and parallel resonance cavity volume；The outside of described resonance series cavity volume I sets a resonance series cavity volume II, and described series connection is altogether Shake and insert pipe connection by the taper of some uniform arrangements between cavity volume I and resonance series cavity volume II；Described H mode filter is positioned at In parallel resonance cavity volume, it is connected with taper structure changes damping hole；Described cascaded H mode filter is positioned at resonance series cavity volume I With in resonance series cavity volume II, it is also connected with taper structure changes damping hole；Described H mode filter and cascaded H mode filter Axially it is symmetrical set, and forms connection in series-parallel H mode filter；Described U-shaped separation of particles module includes a U-tube, and U-tube depends on Secondary electrification module, separation module, the first adsorption module, mechanical centrifugal module, the second adsorption module and demagnetization module are installed；Institute The top stating 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, and it leads to If crossing a top board and bolt stem being installed on end cap；Described helical flow path is contained in inner core, itself and U-shaped separation of particles module Between by one inner core oil inlet pipe connect；Described inner core oil inlet pipe is positioned at oil returning tube oil inlet pipe, and extends into U-shaped separation of particles The central authorities of module, its diameter is less than oil returning tube oil inlet pipe diameter, and is coaxially disposed with oil returning tube oil inlet pipe；Described filter element is arranged on On the inwall of inner core, its precision is 1-5 micron；The bottom of said tub is provided with a hydraulic oil oil-out；

It comprises the steps:

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

2), backflow force feed enters the electrification module of U-shaped separation of particles module, makes the particulate matter in fluid charged, send afterwards To separation module；

3), making the charged corpuscle in fluid be polymerized to tube wall under the effect of external force by segregation apparatus, oil return afterwards delivers to the One adsorbent equipment；

4), by the magnetic polymeric microgranule in the first adsorption module absorption oil return, mechanical centrifugal module is delivered in oil return afterwards；

5), magnetic microparticles not to be adsorbed is centrifuged by mechanical centrifugal module, and the second adsorption module is delivered in oil return afterwards；

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

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

8), the fluid of the most U-shaped separation of particles module near-wall is back to oil after entering oil returning tube by oil returning tube oil inlet pipe Case, the fluid of the pipeline center containing trace small particle microgranule then enters inner core by inner core oil inlet pipe and carries out high-precision filtration；

9), the fluid carrying small particle microgranule flows into the helical flow path of inner core in the way of tangential influent stream, and fluid is at centrifugal force It is close to filter core flow under effect, and carries out high-precision filtration；

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

2. the oil strain method using full frequency band operating mode adaptive-filtering, electrifying and be centrifuged as claimed in claim 1, its feature exists In: 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 In resonance series cavity volume I and parallel resonance cavity volume, its taper angle is 10 °；Described taper structure changes damping hole cone shaped elastic damps The Young's modulus of 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 of slot apertures The Young's modulus of modular ratio cone shaped elastic damping hole pipe wants big, can be with fluid opened by pressure or closedown；Described taper is inserted pipe and is opened The wider place of mouth is positioned at resonance series cavity volume II, and its taper angle is 10 °；Pipe and taper structure changes damping hole are inserted in described taper Mutually stagger in position.

3. the oil strain method using full frequency band operating mode adaptive-filtering, electrifying and be centrifuged as claimed in claim 1, its feature exists In: described electrification module includes some electrodes and an electrode controller；Described some electrodes are installed on the first oil return pipe, its It is respectively connecting to electrode controller.

4. the oil strain method using full frequency band operating mode adaptive-filtering, electrifying and be centrifuged as claimed in claim 1, its feature exists Use uniform magnetic field separation module in: described separation module, this uniform magnetic field separation module include aluminum matter pipeline, two magnetic poles with 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 It is oppositely arranged；Said two magnetic pole is respectively and electrically connected on magnetic pole controller.

5. the oil strain method using full frequency band operating mode adaptive-filtering, electrifying and be centrifuged as claimed in claim 1, its feature exists Use rotating excitation field separation module in: described separation module, this rotating excitation field separation module include 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 It is coated on aluminum matter pipeline；Described three-phase symmetrical current module connects described three-phase symmetric winding.

6. the oil strain method using full frequency band operating mode adaptive-filtering, electrifying and be centrifuged as claimed in claim 1, its feature exists In: described separation module uses helical pipe magnetic field separation module, and this helical pipe magnetic field separation module includes aluminum matter serpentine pipe Road, solenoid and solenoid control circuit；Wherein, described aluminum matter helical pipe is arranged in solenoid；Described solenoid and Solenoid control circuit is electrically connected with.

7. the oil strain method using full frequency band operating mode adaptive-filtering, electrifying and be centrifuged as claimed in claim 1, its feature exists In: described first adsorption module and second is inhaled adsorption module and is used homopolarity adjacent type absorbing ring, this homopolarity adjacent type absorbing ring bag Include aluminium ring shape pipeline, forward solenoid, reverse solenoid and irony magnetic conduction cap；Described forward solenoid and reverse solenoid Being respectively arranged in aluminium ring shape pipeline, both are connected with electric current in opposite direction so that forward solenoid and reverse solenoid phase Like pole is produced at Lin；Described irony magnetic conduction cap is 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.

8. the oil strain method using full frequency band operating mode adaptive-filtering, electrifying and be centrifuged as claimed in claim 1, its feature exists In: described first adsorption module and second is inhaled adsorption module and is used the homopolarity adjacent type absorbing ring of charged hammer, this charged hammer Homopolarity adjacent type absorbing ring include 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 direction Contrary electric current so that forward solenoid and reverse solenoid adjacent produce like pole；Described irony magnetic conduction cap is arranged in On the inwall of aluminium ring shape pipeline, it is positioned at forward solenoid and reverse solenoid adjacent and forward solenoid and reversely The intermediate point of solenoid axis；Described dividing plate is between forward solenoid and reverse solenoid；Described electric shock hammer and electric magnet 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 oil strain method using full frequency band operating mode adaptive-filtering, electrifying and be centrifuged described in claim 1, its feature exists In: described mechanical centrifugal module uses eddy flow to be centrifuged module；Described eddy flow be centrifuged module include eddy flow tube wall, the first flow deflector, Second flow deflector, motor and flow transducer；Wherein, described first flow deflector is provided with 3, these 3 first flow deflectors Being 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 phase With, 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；Institute The long limit stating the 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 the wing Shape, 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 first to lead Flow and the second flow deflector, to regulate laying angle；Described flow transducer is arranged on the central authorities in tube wall.

10. the oil strain method using full frequency band operating mode adaptive-filtering, electrifying and be centrifuged described in claim 1, its feature exists In: 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；Set on described overflow valve Having an oil drain out, this oil drain out is connected to a fuel tank by pipeline；The bottom of described inner core is rounding mesa-shaped, and it passes through an inner core Oil exit pipe and oil returning tube connect, and inner core oil exit pipe is provided with an automatically controlled check-valves；It is hollow that the center upright of described inner core is provided with one 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 spiral shell The tangent connection in eddy flow road.