CN105971992A - Oil filtering method using variable-structure filtering, electrification, separation, centrifuging and rotating magnetic field - Google Patents

Abstract

The invention relates to an oil filtering method using variable-structure filtering, electrification, separation, centrifuging and a rotating magnetic field. The pressure/flow pulsation of hydraulic oil is attenuated through a filter, and a variable-structure filter is adopted. The separation of solid particulates is realized through a U-shaped particulate separating module. The solid particulates in oil liquid move towards a pipeline wall and, after entering an oil return cylinder through an oil inlet pipeline of the oil return cylinder, flow back to an oil tank; and the oil liquid containing a trace of particulates with small particle sizes in the center of the pipeline enters an inner cylinder through an oil inlet pipeline of the inner cylinder, and high-precision filtering is carried out on the oil liquid, so that the service life of a filter element is prolonged. The oil liquid entering the oil inlet pipeline of the inner cylinder flows into a spiral runner of the inner cylinder in a tangential flowing manner; as the wall of the inner cylinder is the filter element, filtrate flows close to the filter element under the action of centrifugal force; the filtrate rapidly flows in parallel with the surface of the filter element, and the filtered hydraulic oil flows out into an outer cylinder in a direction perpendicular to the surface of the filter element; polluting particulates deposited at the bottom of the inner cylinder can be discharged into the oil return cylinder through an electrically controlled check valve at regular time; and therefore, the service life of the filter element is further prolonged.

Description

Filter with structure changes, electrify, separate, be centrifuged and the oil strain method of rotating excitation field

[technical field]

The present invention relates to a kind of hydraulic oil filtering method, be specifically related to the filtering of one structure changes, electrify, Separate, be centrifuged and the oil strain method of rotating excitation field, 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 solve above-mentioned technical problem, a kind of innovation of necessary offer with structure changes filtering, Electrify, separate, be centrifuged and the oil strain method of rotating excitation field, 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, the filter with structure changes, electrify, separate, be centrifuged and rotary magnetic of length in service life The oil strain method of field.

For achieving the above object, the technical scheme that the present invention takes is: with structure changes filtering, electrification, Separating, be centrifuged and the oil strain method of rotating excitation field, it uses a kind of oil-filtering apparatus, and this device includes the end 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 put successively On base plate；Described wave filter includes input pipe, shell, outlet tube, elastic thin-wall, plug-in type H Mode filter and plug-in type cascaded H mode filter；Wherein, described input pipe is connected to the one of shell End, itself and hydraulic oil inlet docking；Described outlet tube is connected to the other end of shell, and it is with U-shaped Separation of particles module is 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 c-type cavity volume wave filter；Described elastic thin-wall and shell Between form resonance series cavity volume I, resonance series cavity volume II and parallel resonance cavity volume；Described series connection Separated by an elastic baffle between resonance cavity volume I and resonance series cavity volume II；Described elastic thin-wall Some taper structure changes damping holes are uniformly had on Zhou Xiang；Described taper structure changes damping hole is by Conical Projectile Property damping hole pipe and slot apertures composition；Described elastic baffle is provided with taper near input tube side and inserts pipe, institute State taper and insert pipe connection resonance series cavity volume I and resonance series cavity volume II；Described plug-in type H type is filtered Ripple device is positioned at parallel resonance cavity volume, and it is connected with taper structure changes damping hole；Described plug-in type string Connection H mode filter is positioned at resonance series cavity volume I and resonance series cavity volume II, and it also becomes knot with taper Structure damping hole is connected；Described plug-in type H mode filter and plug-in type cascaded H mode filter axially in It is symmetrical arranged, and forms plug-in type connection in series-parallel H mode filter；Described U-shaped separation of particles module includes One U-tube, U-tube is sequentially installed with electrification module, separation module, the first adsorption module, machine Tool is centrifuged module, the second adsorption module and demagnetization module；Described U-shaped separation of particles module and oil returning tube Top by one oil returning tube oil inlet pipe connect；Described inner core is placed in outer barrel, its by a top board with And if bolt stem is installed on end cap；Described helical flow path is contained in inner core, and itself and U-shaped microgranule divide Connected by an inner core oil inlet pipe between module；Described inner core oil inlet pipe is positioned at oil returning tube oil inlet pipe In, and extend into the central authorities of U-shaped separation of particles module, its diameter is less than oil returning tube oil inlet pipe diameter, And be coaxially disposed with oil returning tube oil inlet pipe；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；

It comprises the steps:

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

2), backflow force feed enters the electrification module of U-shaped separation of particles module, makes the granule in fluid Material is charged, delivers to separation module afterwards；

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

4), by the magnetic polymeric microgranule in the first adsorption module absorption oil return, machine is delivered in oil return afterwards Tool is centrifuged module；

5), magnetic microparticles not to be adsorbed is centrifuged by mechanical centrifugal module, and oil return afterwards delivers to Two adsorption modules；

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 entered back by oil returning tube oil inlet pipe Being back to fuel tank after oil cylinder, the fluid of the pipeline center containing trace small particle microgranule is then entered by inner core Oil pipe enters inner core 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, Fluid is close to filter core flow under the influence of centrifugal force, and carries out high-precision filtration；

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

The present invention with structure changes filter, electrify, separate, centrifugal and rotating excitation field oil strain method is entered One step is: the axis of described input pipe and outlet tube is the most on the same axis；Described taper structure changes hinders The wider place of opening, Buddhist nun hole is positioned at resonance series cavity volume I and parallel resonance cavity volume, and its taper angle is 10 °； The Young's modulus of its cone shaped elastic damping hole pipe is bigger than the Young's modulus of elastic thin-wall, can be with fluid pressure Power change stretching or compression；The Young's modulus of slot apertures is wanted than the Young's modulus of cone shaped elastic damping hole pipe Greatly, 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 In cavity volume II, its taper angle is 10 °；The position of pipe and taper structure changes damping hole is inserted in described taper Mutually stagger；The inner side of described elastic thin-wall is provided with colloid damping layer；Described colloid damping layer interior It is elastic that layer and outer layer are respectively outer layer elastic thin-wall and internal layer elastic thin-wall, outer layer elastic thin-wall and internal layer Connected by some pillars are fixing between thin-walled；Between described outer layer elastic thin-wall and internal layer elastic thin-wall It is filled with the pure water adding antifreezing agent in interlayer, in pure water, is suspended with Bio-sil；Described colloid hinders Buddhist nun's layer is connected with shell near one end of outlet tube；Described colloid damping layer sets near one end of outlet tube There is a piston.

The present invention with structure changes filter, electrify, separate, centrifugal and rotating excitation field oil strain method is entered One step is: described electrification module includes some electrodes and an electrode controller；Described some electrodes are pacified Being loaded on the first oil return pipe, it is respectively connecting to electrode controller.

The present invention with structure changes filter, electrify, separate, centrifugal and rotating excitation field oil strain method is entered One step is: 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 On matter pipeline, the opposite polarity of these two magnetic poles, and in being oppositely arranged；Said two magnetic pole electricity respectively Property is connected on magnetic pole controller.

The present invention with structure changes filter, electrify, separate, centrifugal and rotating excitation field oil strain method is entered One step is: 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 relative Winding is claimed to be 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.

The present invention with structure changes filter, electrify, separate, centrifugal and rotating excitation field oil strain method is entered One step is: described separation module uses helical pipe magnetic field separation module, this helical pipe magnetic field separation Module includes aluminum matter helical pipe, solenoid and solenoid control circuit；Wherein, described aluminum matter spiral shell Coil road is arranged in solenoid；Described solenoid and solenoid control circuit are electrically connected with.

The present invention with structure changes filter, electrify, separate, centrifugal and rotating excitation field oil strain method is entered One step is: described first adsorption module and second is inhaled adsorption module and used homopolarity adjacent type absorbing ring, should 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, both It is connected with electric current in opposite direction so that forward solenoid and reverse solenoid adjacent produce same sex magnetic Pole；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.

The present invention with structure changes filter, electrify, separate, centrifugal and rotating excitation field oil strain method is entered One step is: described first adsorption module and second is inhaled adsorption module and used the adjacent type of homopolarity of charged hammer Absorbing ring, the homopolarity adjacent type absorbing ring of this charged hammer 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 is 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 in aluminum On the inwall of matter circulating line, it is positioned at forward solenoid and reverse solenoid adjacent and forward Solenoid and the intermediate point of reverse solenoid axis；Described dividing plate is positioned at forward solenoid and reverse helical Between pipe；Described electric shock hammer and electric magnet are between dividing plate；Described electric magnet connects and can promote electricity Hammer, makes electric shock hammer tap aluminium ring shape inner-walls of duct.

The present invention with structure changes filter, electrify, separate, centrifugal and rotating excitation field oil strain method is entered One step is: described mechanical centrifugal module uses eddy flow to be centrifuged module；Described eddy flow is centrifuged module and includes rotation Flow tube wall, the first flow deflector, the second flow deflector, motor and flow transducer；Wherein, institute Stating the first flow deflector and be provided with 3, these 3 first flow deflectors uniformly divide along tube wall inner periphery every 120 ° Cloth, 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℃；The long limit of described first flow deflector is connected with tube wall, and minor face extends along the axis of tube wall；Before it Edge frustrates into obtuse, and trailing edge is processed into wing, and its height is 0.4 times of tube wall diameter, a length of tube wall 1.8 times of diameter；Described motor connects and drives the first flow deflector and the second flow deflector, to adjust Joint laying angle；Described flow transducer is arranged on the central authorities in tube wall.

The present invention with structure changes filter, electrify, separate, the oil strain method of centrifugal and rotating excitation field also For: 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；Described inner core Bottom be rounding mesa-shaped, it is connected by an inner core oil exit pipe and oil returning tube, and inner core oil exit pipe sets There is an automatically controlled check-valves；The center upright of described inner core is provided with a hollow cylinder, the top of hollow cylinder Being provided with pressure difference indicator, this pressure difference indicator is installed on end cap；Described inner core oil inlet pipe and spiral flow The tangent connection in road.

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 filtering with structure changes, electrify, separates, adsorbs and the oil strain of rotating excitation field of the present invention The structural representation of device.

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

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

Fig. 4-1 is plug-in type H mode filter schematic diagram in Fig. 3.

Fig. 4-2 is plug-in type cascaded H mode filter schematic diagram in Fig. 3.

Fig. 5 is plug-in type H mode filter and plug-in type cascaded H mode filter frequency characteristic constitutional diagram. Wherein, solid line is plug-in type cascaded H mode filter frequency characteristic.

Fig. 6 is plug-in type connection in series-parallel H mode filter frequency characteristic figure.

Fig. 7 is the structural representation of c-type cavity volume wave filter.

Fig. 8 is the cross sectional representation of elastic thin-wall.

Fig. 9 is the Longitudinal cross section schematic of colloid damping layer.

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 be one structure changes filtering, Electrifying, separate, adsorb and the oil-filtering apparatus of rotating excitation field, it is by base plate 6, wave filter 8, U-shaped micro- Grain separation module 3, oil returning tube 7, inner core 15, helical flow path 17, filter element 18, outer barrel 19 and Several parts compositions such as end cap 25.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 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 89, Outlet tube 811, elastic thin-wall 87, plug-in type H mode filter 812 and the filter of plug-in type cascaded H type Several parts compositions such as ripple device 813.

Wherein, described input pipe 81 is connected to one end of shell 89, and itself and a hydraulic oil inlet 1 are right Connect；Described outlet tube 811 is connected to the other end of shell 89, itself and U-shaped separation of particles module 3 Docking.Described elastic thin-wall 87 is installed in shell 89 along the radial direction of shell.Described input pipe 81 With the axis of outlet tube 811 the most on the same axis, the filter effect of more than 10% can so be improved.

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

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

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, when the pressure pulse wave of different frequency is by this wave filter, transmission coefficient is with frequency Rate and different.Frequency is the highest, then transmission coefficient is the least, and this shows that the pressure pulse wave of high frequency is passing through Decay the most severe during wave filter, 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, The pressure of fluctuation acts on convection cell on fluid and produces pinch effect.When the flow of change passes through input pipe During 81 entrance c-type cavity volume, liquid stream exceedes average discharge, and the cavity volume of expansion can absorb unnecessary liquid stream, And release liquid stream when less than average discharge, 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, c-type Cavity volume is more weak to the damping capacity of pressure oscillation, flows into the periodically pulsing pressure of wave filter c-type cavity volume Continuous action is on the inside and outside wall of elastic thin-wall 87, and elastic thin-wall 87 does week by the frequency of fluctuation pressure Phase property is vibrated, and this forced vibration consumes the pressure fluctuation energy of fluid, thus realizes Mid Frequency pressure Filtering.From the principle of virtual work, elastic thin-wall consumes the ability of fluid pulsation pressure energy and is forced to it Potential energy and kinetic energy sum during vibration are directly related, in order to improve Mid Frequency filtering performance, elastic thin-wall Radial design be much larger than pipe radius, and the thickness of thin-walled is less, and representative value is less than 0.1mm.

Further, between described elastic thin-wall 87 and shell 89 formed resonance series cavity volume I84, Resonance series cavity volume II83 and parallel resonance cavity volume 85, described cavity volume 83,84,85 is across whole Wave filter, it is hereby achieved that bigger resonance cavity volume volume, strengthens attenuating.Described series connection is altogether Shake and separated by an elastic baffle 810 between cavity volume I84 and resonance series cavity volume II83.Described elasticity Uniformly having some taper structure changes damping holes 86 in the axial direction of thin-walled 87, described taper structure changes hinders The wider place of opening, Buddhist nun hole 86 is positioned at resonance series cavity volume I84 and parallel resonance cavity volume 85, its tapering Angle is 10 °.Described elastic baffle 810 is provided with taper and inserts pipe 82 near input pipe 81 side, described Taper is inserted pipe 82 and is connected resonance series cavity volume I84 and resonance series cavity volume II83.Described taper is inserted The wider place of pipe 82 opening is positioned at resonance series cavity volume II83, and its taper angle is 10 °, described taper Mutually stagger in the position inserting pipe 82 and taper structure changes damping hole 86.

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

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

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

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

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

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

Wherein:

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

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

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

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

Described plug-in type H mode filter 812 and plug-in type cascaded H mode filter 813 are the most symmetrically Arrange, and form plug-in type connection in series-parallel H mode filter, for broadening frequency filtering scope and make entirety More compact structure.The multiple plug-in type connection in series-parallel H mode filters of the present invention circumferentially interface distributions (figure In only depict 2), separate with dividing plate 820 each other.

By Fig. 5 plug-in type H mode filter and plug-in type cascaded H mode filter frequency characteristic and formula (1) (2) (3) all can find, plug-in type cascaded H mode filter has 2 natural angular frequencies, At crest, filter effect is preferable, does not the most substantially have filter effect at trough；Plug-in type H type filters Device has 1 natural angular frequency, and at crest, filter effect is preferable equally, does not the most substantially have at trough There is filter effect；Select suitable filter parameter, make the natural angular frequency of plug-in type H mode filter Just fall between 2 natural angular frequencies of plug-in type cascaded H mode filter, as shown in Figure 6, both The natural reonant frequency peak value of 3 next-door neighbours is defined, in this frequency range in certain frequency range In, no matter the fluctuating frequency of pressure is at crest or all can guarantee that preferable filter effect at trough. The bank of filters that multiple plug-in type connection in series-parallel H mode filters are constituted both can cover whole medium and low frequency section, real The entire spectrum filtering of existing medium and low frequency section.

Further, 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 inner side of described elastic thin-wall 87 is provided with colloid damping layer 88.Described colloid damping layer 88 Internal layer and outer layer are respectively outer layer elastic thin-wall 81 and internal layer elastic thin-wall 82, outer layer elastic thin-wall 81 And connected by some pillars 814 are fixing between internal layer elastic thin-wall 82.Outer layer elastic thin-wall 81 and interior It is filled with the pure water 816 adding antifreezing agent, in pure water 816 in interlayer between layer elastic thin-wall 82 It is suspended with Bio-sil 815.Described colloid damping layer 88 is near one end of outlet tube 811 and shell 89 It is connected；Described colloid damping layer 88 is additionally provided with a piston 817 near one end of outlet tube 811.

Due to outer layer elastic thin-wall 81 with internal layer elastic thin-wall 82 spacing is the least and is fixed by pillar 814 Connecting, when pressure fluctuation acts perpendicularly to thin-walled, inside and outside wall produces and is close to consistent deformation, colloid Damping layer thickness is kept approximately constant, and pressure fluctuation is not had damping action；Colloid damping layer 88 The flow pulsation in 817 sensation level directions of piston, when flow pulsation strengthens, piston 817 pressurized makes Colloid damping layer shrinks, and squeezing action makes the water in colloid damping layer 88 by nanoscale transfer passage Enter micron order central void；When flow pulsation weakens, piston 817 is by back-pressure, and now colloid damps Layer expands, and the water in colloid damping layer is discharged through passage from central void.In the process, due to silicon The mechanics effect of glue 815 microchannel sorption, the roughness effect of channel surface molecular scale and chemistry are non-all Mass effect, piston follows the boundary that colloid damping layer shrinks and does " gas-liquid-solid " border in expansion process Face merit, thus flow systolic implementation is decayed, its substantially parallel R mode filter.This filter Ripple device is relative to the advantage of general liquid condenser: it is by the boundary on " gas-liquid-solid " border The mode of face merit decays flow pulsation, can absorb a large amount of mechanical energy in the case of not producing heat, And energy expenditure does not relies on piston speed, extinction efficiency is obviously improved.

The present invention can also the pulsation decay of solid line operating mode self-adaptive pressure.When hydraulic system working conditions change, Both executive component stopped suddenly or ran, and when the opening of valve changes, can cause the spy of pipe-line system Property impedance is undergone mutation, so that former pipeline pressure curve with change in location in time changes the most therewith Become, then the position of pressure peak also changes.Axial length design due to the wave filter of the present invention For pulsing wavelength, and the plug-in type connection in series-parallel H mode filter group of wave filter more than system main pressure Cavity volume length, the length of c-type cavity volume wave filter and the length of elastic thin-wall 87 and wave filter axial length Equal, it is ensured that pressure peak position is constantly in the effective range of wave filter；And taper becomes Structural damping hole 86 is opened on elastic thin-wall 87, is uniformly distributed in the axial direction, at elastic baffle 810 Axial direction on uniformly have multiple identical parameters taper insert pipe 82, taper structure changes damping hole 86 Insert pipe 82 position with taper mutually to stagger so that the pressure peak change in location performance to wave filter Have 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 Power pulsation damping capacity.

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 it is unnecessary that the cavity volume of expansion absorbs 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 plug-in type connection in series-parallel H mode filter group, by taper structure changes damping hole, taper Insert pipe and fluid produces resonance, consume pulsation energy, complete the filtering of low frequency pulsation；

4), the axial length of wave filter is designed as more than hydraulic system main pressure pulsation wavelength, and Plug-in type connection in series-parallel H mode filter length, c-type cavity volume filter length and elastic thin-wall 87 length Equal with filter length, make pressure peak position be constantly in the effective range of wave filter, real The filtering of pressure fluctuation when existing system condition 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. filter with structure changes, electrify, separate, be centrifuged and the oil strain method of rotating excitation field, it is characterized in that: it uses a kind of oil-filtering apparatus, and this device 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 includes input pipe, shell, outlet tube, elastic thin-wall, plug-in type H mode filter and plug-in type cascaded H mode filter；Wherein, described input pipe is connected to one end of shell, itself and hydraulic oil inlet docking；Described outlet tube is connected to the other end of 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 c-type cavity volume wave filter；Resonance series cavity volume I, resonance series cavity volume II and parallel resonance cavity volume is formed between described elastic thin-wall and shell；Separated by an elastic baffle between described resonance series cavity volume I and resonance series cavity volume II；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；Described elastic baffle is provided with taper near input tube side and inserts pipe, and pipe connection resonance series cavity volume I and resonance series cavity volume II is inserted in described taper；Described plug-in type H mode filter is positioned at parallel resonance cavity volume, and it is connected with taper structure changes damping hole；Described plug-in type cascaded H mode filter is positioned at resonance series cavity volume I and resonance series cavity volume II, and it is also connected with taper structure changes damping hole；Described plug-in type H mode filter and plug-in type cascaded H mode filter are axially symmetrical set, and form plug-in type connection in series-parallel H mode filter；Described 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；

It comprises the steps:

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

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

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

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 fuel tank after entering oil returning tube by oil returning tube oil inlet pipe, and 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 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, and is discharged by the hydraulic oil oil-out bottom urceolus.

2. filter with structure changes, electrify, separate, be centrifuged and the oil strain method of rotating excitation field as claimed in claim 1, 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 its 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 °；Described taper is inserted the position of pipe and taper structure changes damping hole and is mutually staggered；The inner side of described elastic thin-wall is provided with colloid damping layer；The internal layer of described colloid damping layer and outer layer are respectively outer layer elastic thin-wall and internal layer elastic thin-wall, are connected by some pillars are fixing between outer layer elastic thin-wall and internal layer elastic thin-wall；It is filled with, in interlayer between described outer layer elastic thin-wall and internal layer elastic thin-wall, the pure water adding antifreezing agent, in pure water, is suspended with Bio-sil；Described colloid damping layer is connected with shell near one end of outlet tube；Described colloid damping layer is provided with a piston near one end of outlet tube.

3. filter with structure changes, electrify, separate, be centrifuged and the oil strain method of rotating excitation field as claimed in claim 1, 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. filter with structure changes, electrify, separate, be centrifuged and the oil strain method of rotating excitation field as claimed in claim 1, 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. filter with structure changes, electrify, separate, be centrifuged and the oil strain method of rotating excitation field as claimed in claim 1, 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. filter with structure changes, electrify, separate, be centrifuged and the oil strain method of rotating excitation field as claimed in claim 1, 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. filter with structure changes, electrify, separate, be centrifuged and the oil strain method of rotating excitation field as claimed in claim 1, 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. filter with structure changes, electrify, separate, be centrifuged and the oil strain method of rotating excitation field as claimed in claim 1, 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. filtering with structure changes, electrify, separate, being centrifuged and the oil strain method of rotating excitation field described in claim 1, 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. filtering with structure changes, electrify, separate, being centrifuged and the oil strain method of rotating excitation field described in claim 1, 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.