CN105909619A - Oil filtering method adopting variable-structure filtering, electrification, separation, adsorption and rotating magnetic field - Google Patents

Abstract

The invention relates to an oil filtering method adopting variable-structure filtering, electrification, separation, adsorption and a rotating magnetic field. A filter is used for attenuating pressure/flow pulsation of hydraulic oil, and the variable-structure filter is adopted; separation of solid particles is achieved through a U-shaped particle separating module, the solid particles in the oil are made to move to the pipe wall, the oil enters an oil return barrel through an oil return barrel oil inlet pipe and then flows back into an oil tank, and the oil which contains trace of small-diameter particles and is located in the pipe center enters an inner barrel through an inner barrel oil inlet pipe to be subjected to high-precision filtering, so that the service life of a filter element is prolonged; the oil entering the inner barrel oil inlet pipe flows into a spiral flow channel of the inner barrel in a tangential inflow mode, the inner barrel wall is used as the filter element, filter liquor flows by tightly attaching the filter element under the effect 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 polluting particles deposited at the bottom of the inner barrel can be regularly discharged to the oil return barrel through an electrically operated check valve, so that the service life of the filter element is prolonged.

Description

Filter with structure changes, electrify, separate, adsorb 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 one structure changes and filter, electrify, separate, adsorb With 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 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, a kind of innovation of necessary offer with structure changes filter, electrify, separate, Absorption 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, adaptability and integration Height, the filtering with structure changes, electrify, separate, adsorb and the oil strain method of rotating excitation field of length in service life.

For achieving the above object, the technical scheme that the present invention takes is: filters with structure changes, electrify, separate, adsorb and revolves Turning the oil strain method in magnetic field, it uses a kind of oil-filtering apparatus, and this device includes base plate, wave filter, U-shaped separation of particles module, returns Oil cylinder, 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 is 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 along the radial direction of shell It is installed in 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 between shell, form resonance series cavity volume I, resonance series cavity volume II and parallel resonance cavity volume；Described resonance series cavity volume I And separated by an elastic baffle between resonance series cavity volume II；Uniformly have some tapers in the axial direction of described elastic thin-wall to become Structural damping hole；Described taper structure changes damping hole is made up of cone shaped elastic damping hole pipe and slot apertures；Described elastic baffle is close Input tube side is provided with taper and inserts pipe, and pipe connection resonance series cavity volume I and resonance series cavity volume II is inserted in described taper；Described slotting Entering formula H mode filter and be positioned at parallel resonance cavity volume, it is connected with taper structure changes damping hole；Described plug-in type cascaded H type Wave filter is positioned at resonance series cavity volume I and resonance series cavity volume II, and it is also connected with taper structure changes damping hole；Described slotting Enter formula H mode filter and plug-in type cascaded H mode filter is 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 absorption mould Block, rotating excitation field are centrifuged module, the second adsorption module and demagnetization module；Described U-shaped separation of particles module and the top of oil returning tube 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 On；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 enters less than oil returning tube Tubing 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, 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, oil return afterwards is delivered to rotating excitation field and is centrifuged Module；

5), rotating excitation field is centrifuged module and utilizes rotating excitation field to separate unadsorbed magnetic microparticles, and oil return afterwards delivers to second Adsorption module；

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 filters with structure changes, electrify, separates, adsorbs and the oil strain method of rotating excitation field is further: described The axis of 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 In cavity volume I and parallel resonance cavity volume, its taper angle is 10 °；The Young's modulus of its cone shaped elastic damping hole pipe is than elastic thin-wall Young's modulus wants big, can be with change in fluid pressure stretching or compression；The Young's modulus of slot apertures is than the poplar of cone shaped elastic damping hole pipe Family name's modulus wants big, can be with fluid opened by pressure or closedown；Described taper is inserted the wider place of tube opening and is positioned at resonance series cavity volume II In, its taper angle is 10 °；Described taper is inserted the position of pipe and taper structure changes damping hole and is mutually staggered；Described elastic thin-wall Inner side be 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 is elastic Thin-walled, is connected by some pillars are fixing between outer layer elastic thin-wall and internal layer elastic thin-wall；Described outer layer elastic thin-wall and internal layer It is filled with the pure water adding antifreezing agent in interlayer between elastic thin-wall, 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 is provided with a piston near one end of outlet tube.

The present invention filters with structure changes, electrify, separates, adsorbs and the oil strain method of rotating excitation field is further: described Electrification module includes some electrodes and an electrode controller；Described some electrodes are installed in U-tube, and it is respectively connecting to electricity Pole controller.

The present invention filters with structure changes, electrify, separates, adsorbs and the oil strain method of rotating excitation field is further: 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 relatively setting Put；Said two magnetic pole is respectively and electrically connected on magnetic pole controller.

The present invention filters with structure changes, electrify, separates, adsorbs and the oil strain method of rotating excitation field is further: described Separation module uses rotating excitation field separation module, and this rotating excitation field separation module includes aluminum matter pipeline, iron shell, three-phase symmetrical 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 On matter pipeline；Described three-phase symmetrical current module connects described three-phase symmetric winding.

The present invention filters with structure changes, electrify, separates, adsorbs and the oil strain method of rotating excitation field is further: described Separation module uses helical pipe magnetic field separation module, and this helical pipe magnetic field separation module includes aluminum matter helical pipe, helical Pipe and solenoid control circuit；Wherein, described aluminum matter helical pipe is arranged in solenoid；Described solenoid and helical management and control Circuit processed is electrically connected with.

The present invention filters with structure changes, electrify, separates, adsorbs and the oil strain method of rotating excitation field is further: described First 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 are respectively arranged In aluminium ring shape pipeline, 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 helical Pipe adjacent and forward solenoid and the intermediate point of reverse solenoid axis.

The present invention filters with structure changes, electrify, separates, adsorbs and the oil strain method of rotating excitation field is further: described First adsorption module and second is inhaled adsorption module and is used the homopolarity adjacent type absorbing ring of charged hammer, the homopolarity phase of this charged hammer Adjacent type absorbing ring includes aluminium ring shape pipeline, forward solenoid, reverse solenoid, irony magnetic conduction cap, dividing plate, electric shock hammer and electricity Magnet；Described forward solenoid and reverse solenoid are respectively arranged in aluminium ring shape pipeline, and both are connected with electricity in opposite direction Stream so that forward solenoid and reverse solenoid adjacent produce like pole；Described irony magnetic conduction cap is arranged in aluminium ring shape On the inwall of pipeline, it is positioned at forward solenoid and reverse solenoid adjacent and forward solenoid and reverse solenoid axle The intermediate point of line；Described dividing plate is between forward solenoid and reverse solenoid；Described electric shock hammer and electric magnet are positioned at dividing plate Between；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 filters with structure changes, electrify, separates, adsorbs and the oil strain method of rotating excitation field is further: described Rotating excitation field is centrifuged module and includes aluminum matter pipeline, iron shell, three-phase symmetric winding, flange 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 flange welding is at aluminum The two ends of matter pipeline；Described three-phase symmetrical current module connects described three-phase symmetric winding.

The present invention filters with structure changes, electrify, separates, adsorbs and the oil strain method of rotating excitation field is also: described oil return The bottom of cylinder 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, 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 by an inner core oil exit pipe and returns Oil 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, open circles Post be arranged over pressure difference indicator, this pressure difference indicator is installed on end cap；Described inner core oil inlet pipe and helical flow path are tangent 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 controlling the temperature of hydraulic oil and making the particulate matter charged polymeric in fluid to electrode applying voltage, and promote Make colloidal particles decompose to melt；Efficient absorption is formed by adsorption module；Rotating excitation field is utilized " to be divided by the molecule in fluid From " and gather near-wall, capture molecule with adsorbent equipment；Avoid endangering to residual particles demagnetization by degaussing gear Hydraulic Elements, so that solid particle is gathered into bulky grain and moves to near-wall in fluid.

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 is the filtering with structure changes, electrify, separates, adsorbs and the structure of oil-filtering apparatus of rotating excitation field is shown of the present invention It is intended to.

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 slotting Enter formula 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 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 structural representation that the rotating excitation field in Figure 11 is centrifuged module.

[detailed description of the invention]

Referring to shown in Figure of description 1 to accompanying drawing 18, the present invention filters for one structure changes, electrify, separates, adsorbs With the oil-filtering apparatus of rotating excitation field, it is by base plate 6, wave filter 8, U-shaped separation of particles module 3, oil returning tube 7, inner core 15, spiral flow Several parts compositions such as road 17, filter element 18, outer barrel 19 and end cap 25.Wherein, described wave filter 8, U-shaped separation of particles module 2, return Oil 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 89, outlet tube 811, elastic thin-wall 87, plug-in type H type Several parts compositions such as wave filter 812 and plug-in type cascaded H mode filter 813.

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 89.The axis of described input pipe 81 and outlet tube 811 the most on the same axis, so can improve more than 10% Filter effect.

Described input pipe 81, outlet tube 811 and elastic thin-wall 87 are collectively forming a c-type cavity volume wave filter, thus liquid of decaying Pressure 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, when the pressure pulse wave of different frequency is by this wave filter, transmission coefficient is different with frequency.Frequently Rate is the highest, then transmission coefficient is the least, and this shows that the pressure pulse wave of high frequency is decayed the most severe when device after filtering, thus rises Arrive 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 Act on convection cell on fluid and produce pinch effect.When the flow of change enters c-type cavity volume by input pipe 81, liquid stream exceedes Average discharge, the cavity volume of expansion can absorb unnecessary liquid stream, and releases liquid stream when less than average discharge, thus absorption pressure arteries and veins Energy.

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

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

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

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

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

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

The design principle of described elastic thin-wall 87 is as follows: when producing intermediate frequency pressure fluctuation in pipeline, 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 inside and outside elastic thin-wall 87 On wall, elastic thin-wall 87 does periodic vibration by the frequency of fluctuation pressure, and this forced vibration consumes the pressure fluctuation energy of fluid Amount, thus realize the filtering of Mid Frequency pressure.From the principle of virtual work, elastic thin-wall consume fluid pulsation pressure energy ability and Potential energy and kinetic energy sum during its forced vibration are directly related, and in order to improve Mid Frequency filtering performance, the radius of elastic thin-wall sets Being calculated as much larger than pipe radius, and the thickness of thin-walled is less, representative value is less than 0.1mm.

Further, resonance series cavity volume I84, resonance series cavity volume are formed between described elastic thin-wall 87 and shell 89 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.By an elastic baffle between described resonance series cavity volume I84 and resonance series cavity volume II83 810 separate.Uniformly having some taper structure changes damping holes 86 in the axial direction of described elastic thin-wall 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, and its taper angle is 10 °.Described elasticity Dividing plate 810 is provided with taper and inserts pipe 82 near input pipe 81 side, and described taper is inserted pipe 82 and connected resonance series cavity volume I84 and string Ally the communists the cavity volume II83 that shakes.Described taper is inserted the wider place of pipe 82 opening and is positioned at resonance series cavity volume II83, and its taper angle is 10 °, described taper is inserted the position of pipe 82 and taper structure changes damping hole 86 and is mutually staggered.

Described plug-in type H mode filter 812 is positioned at parallel resonance cavity volume 85, and it is connected with taper structure changes damping hole 86 Logical.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 cavity volume volume in a medium.

Described plug-in type cascaded H mode filter 813 is positioned at resonance series cavity volume I84 and resonance series cavity volume II83, its Also it is 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 axially symmetrical set, and form slotting Enter formula connection in series-parallel H mode filter, for broadening frequency filtering scope and make overall structure more compact.The present invention divides at circumferentially interface The multiple plug-in type connection in series-parallel H mode filters (only depicting 2 in figure) of cloth, 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) Finding, plug-in type cascaded H mode filter has 2 natural angular frequencies, and at crest, filter effect is preferable, the most basic at trough There is no filter effect；Plug-in type H mode filter has 1 natural angular frequency, and at crest, filter effect is preferable equally, and at trough Place does not has filter effect the most substantially；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 defined in certain frequency range 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 at trough All can guarantee that preferable filter effect.Multiple plug-in type connection in series-parallel H mode filters constitute bank of filters both can cover whole in Low-frequency range, 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 inner side of described elastic thin-wall 87 is provided with colloid damping layer 88.Internal layer and the outer layer of described colloid damping layer 88 divide Not Wei outer layer elastic thin-wall 81 and internal layer elastic thin-wall 82, if by the Heavenly Stems and Earthly Branches between outer layer elastic thin-wall 81 and internal layer elastic thin-wall 82 Post 814 is fixing to be connected.It is filled with in interlayer between outer layer elastic thin-wall 81 and internal layer elastic thin-wall 82 and adds the pure of antifreezing agent Water 816, is suspended with Bio-sil 815 in pure water 816.Described colloid damping layer 88 is near one end of outlet tube 811 and shell 89 are 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 connected, at pressure by pillar 814 is fixing When pulsation acts perpendicularly to thin-walled, inside and outside wall produces and is close to consistent deformation, and colloid damping layer thickness is kept approximately constant, to pressure Power pulsation does not has damping action；The flow pulsation in 817 sensation level directions of piston of colloid damping layer 88, flow pulsation strengthens Time, piston 817 pressurized makes colloid damping layer shrink, 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 damping layer expands, colloid damping layer In water from central void through passage discharge.In the process, due to mechanics effect, the channel table of silica gel 815 microchannel sorption The roughness effect of face molecular scale and chemistry heterogeneous body effect, piston follow colloid damping layer shrink and expansion process is done " gas- Liquid-solid " interfactial work on border, thus flow systolic implementation is decayed, its substantially parallel R mode filter.This filtering Device is relative to the advantage of general liquid condenser: it is decayed flow by the way of the interfactial work on " gas-liquid-solid " border 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, decay effect Rate 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 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 plug-in type connection in series-parallel H type filter of wave filter more than system main pressure The cavity volume length of ripple device group, the length of c-type cavity volume wave filter and the length of elastic thin-wall 87 and wave filter axial length are equal, protect Demonstrate,prove pressure peak position to be constantly in the effective range of wave filter；And taper structure changes damping hole 86 is opened in Thin Elastic On wall 87, being uniformly distributed in the axial direction, the taper uniformly having multiple identical parameters in the axial direction of elastic baffle 810 is inserted Pipe 82, taper structure changes damping hole 86 and taper are inserted pipe 82 position and are mutually staggered so that pressure peak change in location is to filtering The performance of device has little to no effect, it is achieved thereby that operating mode adaptive-filtering function.In view of three kinds of filter structure axial dimensions Suitable with wave filter, this bigger size also ensure that hydraulic filter possesses stronger pressure fluctuation damping capacity.

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

1), hydraulic fluid enters 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 plug-in type connection in series-parallel H mode filter group, pipe and fluid are inserted by taper structure changes damping hole, taper Produce 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 string is also Connection H mode filter length, c-type cavity volume filter length and elastic thin-wall 87 length are equal with filter length, make pressure peak Position is constantly in the effective range of wave filter, it is achieved the filtering of pressure fluctuation when system condition changes.

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

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, rotating excitation field are centrifuged 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

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

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 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 rotating excitation field is centrifuged module 36 and utilizes the centrifugal small magnetic not adsorbed by the first adsorbent equipment 34 of rotating excitation field Changing granule, it is by aluminum matter pipeline 361, iron shell 362, three-phase symmetric winding 363, flange 364 and three-phase symmetrical current-mode Block 365 forms.Described three-phase symmetric winding 363 is wound on outside aluminum matter pipeline 361.Described iron shell 362 is coated on aluminum matter pipeline On 361.Described flange 364 is welded on the two ends of aluminum matter pipeline 361.Described three-phase symmetrical current module 365 connects described three-phase Symmetric winding 363.

The operation principle that described rotating excitation field is centrifuged module 36 is as follows: small magnetization granule not to be adsorbed enters rotary magnetic The centrifugal module 36 in field, three-phase symmetrical current module 365 makes to flow through in three-phase symmetric winding 363 three-phase symmetrical electric current, and this electric current exists Producing rotating excitation field in aluminum matter pipeline 361, magnetized particles is acted on by magnetic field force under rotating excitation field effect, and in this power Spirally advance under effect, simultaneously to vessel wall motion.Therefore, regulation magnetic field intensity can make the granule in fluid from fluid " separate " out, be gathered in aluminum matter pipeline 361 near-wall, it is simple to subsequent adsorbtion captures.

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 rotated magnetic field further and be centrifuged the granule that module 36 separates.

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.

Use above-mentioned oil filter that backflow is pressed with the processing step of process 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), adsorbed the magnetic polymeric microgranule in oil return by the first adsorption module 34, oil return afterwards deliver to rotating excitation field from Core module 36；

5), rotating excitation field is centrifuged module 36 and utilizes rotating excitation field to separate unadsorbed magnetic microparticles, and oil return afterwards delivers to the Two adsorption modules 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. filter with structure changes, electrify, separate, adsorb and the oil strain method of rotating excitation field, it is characterised in that: it uses a kind of filter Oil device, this device include base plate, wave filter, U-shaped separation of particles module, oil returning tube, inner core, helical flow path, filter element, outer barrel with 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 bag Include input pipe, shell, outlet tube, elastic thin-wall, plug-in type H mode filter and plug-in type cascaded H mode filter；Wherein, institute State input pipe and be connected to one end of shell, itself and hydraulic oil inlet docking；Described outlet tube is connected to the other end of shell, its Dock with U-shaped separation of particles module；Described elastic thin-wall is installed in shell along the radial direction of shell；Described input pipe, outlet tube It is collectively forming a c-type cavity volume wave filter with elastic thin-wall；Resonance series cavity volume I, string is formed between described elastic thin-wall and shell Ally the communists cavity volume II and the parallel resonance cavity volume of shaking；By an elasticity between described resonance series cavity volume I and resonance series cavity volume II Dividing plate separates；Some taper structure changes damping holes are uniformly had in the axial direction of described elastic thin-wall；Described taper structure changes damps 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, described cone Shape inserts pipe connection resonance series cavity volume I and resonance series cavity volume II；Described plug-in type H mode filter is positioned at parallel resonance cavity volume In, 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 series connection In resonance cavity volume II, it is also connected with taper structure changes damping hole；Described plug-in type H mode filter and plug-in type cascaded H type Wave filter is axially symmetrical set, and forms plug-in type connection in series-parallel H mode filter；Described U-shaped separation of particles module includes that one is U-shaped Pipe, U-tube is sequentially installed with electrification module, separation module, the first adsorption module, rotating excitation field are centrifuged module, the second absorption 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；In described Cylinder 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, its And connected by an inner core oil inlet pipe between U-shaped separation of particles module；Described inner core oil inlet pipe is positioned at oil returning tube 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 coaxially sets with oil returning tube oil inlet pipe Put；Described filter element is arranged on the inwall of inner core, and its precision is 1-5 micron；It is fuel-displaced that the bottom of said tub is provided with a hydraulic oil Mouthful；

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, oil return afterwards is delivered to rotating excitation field and is centrifuged module；

5), rotating excitation field is centrifuged module and utilizes rotating excitation field to separate unadsorbed magnetic microparticles, and the second absorption is delivered in oil return afterwards Module；

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. filter with structure changes, electrify, separate, adsorb and the oil strain method of rotating excitation field, its feature as claimed in claim 1 It is: the axis of described input pipe and outlet tube is the most on the same axis；Position, described taper structure changes damping hole opening wider place In resonance series cavity volume I and parallel resonance cavity volume, its taper angle is 10 °；The Young's modulus ratio of its cone shaped elastic damping hole pipe The Young's modulus of elastic thin-wall wants big, can be with change in fluid pressure stretching or compression；The Young's modulus of slot apertures hinders than cone shaped elastic The Young's modulus of Buddhist nun hole pipe wants big, can be with fluid opened by pressure or closedown；Described taper is inserted the wider place of tube opening and is positioned at series connection In resonance cavity volume II, its taper angle is 10 °；Described taper is inserted the position of pipe and taper structure changes damping hole and is mutually staggered；Institute The inner side stating elastic thin-wall is provided with colloid damping layer；Internal layer and the outer layer of described colloid damping layer are respectively outer layer elastic thin-wall With internal layer elastic thin-wall, connected by some pillars are fixing between outer layer elastic thin-wall and internal layer elastic thin-wall；Described outer layer is elastic It is filled with the pure water adding antifreezing agent in interlayer between thin-walled and internal layer elastic thin-wall, 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 one near one end of outlet tube Piston.

3. filter with structure changes, electrify, separate, adsorb and the oil strain method of rotating excitation field, its feature as claimed in claim 1 It is: described electrification module includes some electrodes and an electrode controller；Described some electrodes are installed in U-tube, its point It is not connected to electrode controller.

4. filter with structure changes, electrify, separate, adsorb and the oil strain method of rotating excitation field, its feature as claimed in claim 1 It 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 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, adsorb and the oil strain method of rotating excitation field, its feature as claimed in claim 1 It is: described separation module uses rotating excitation field separation module, and this rotating excitation field separation module includes outside aluminum matter pipeline, irony Shell, three-phase symmetric winding and three-phase symmetrical current module；Described three-phase symmetric winding is wound on outside aluminum matter pipeline；Outside described irony 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, adsorb and the oil strain method of rotating excitation field, its feature as claimed in claim 1 It is: described separation module uses helical pipe magnetic field separation module, and this helical pipe magnetic field separation module includes aluminum matter spiral Pipeline, solenoid and solenoid control circuit；Wherein, described aluminum matter helical pipe is arranged in solenoid；Described solenoid It is electrically connected with solenoid control circuit.

7. filter with structure changes, electrify, separate, adsorb and the oil strain method of rotating excitation field, its feature as claimed in claim 1 It is: described first adsorption module and second is inhaled adsorption module and used homopolarity adjacent type absorbing ring, this homopolarity adjacent type absorbing ring Including aluminium ring shape pipeline, forward solenoid, reverse solenoid and irony magnetic conduction cap；Described forward solenoid and reverse helical Pipe 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 produces like pole；Described irony magnetic conduction cap is arranged on the inwall of aluminium ring shape pipeline, and it is positioned at forward solenoid With reverse solenoid adjacent and forward solenoid and the intermediate point of reverse solenoid axis.

8. filter with structure changes, electrify, separate, adsorb and the oil strain method of rotating excitation field, its feature as claimed in claim 1 It is: described first adsorption module and second is inhaled adsorption module and used the homopolarity adjacent type absorbing ring of charged hammer, and this band shocks by electricity The homopolarity adjacent type absorbing ring of hammer includes aluminium ring shape pipeline, forward solenoid, reverse solenoid, irony magnetic conduction cap, dividing plate, electricity Hammer and electric magnet；Described forward solenoid and reverse solenoid are respectively arranged in aluminium ring shape pipeline, both sides of being connected with To contrary electric current 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, it is positioned at forward solenoid and reverse solenoid adjacent and forward solenoid and anti- To the intermediate point of solenoid axis；Described dividing plate is between forward solenoid and reverse solenoid；Described electric shock hammer and electromagnetism Ferrum is 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, adsorbing and the oil strain method of rotating excitation field described in claim 1, its feature exists In: described rotating excitation field is centrifuged module and includes aluminum matter pipeline, iron shell, three-phase symmetric winding, flange and three-phase symmetrical electricity Flow module；Described three-phase symmetric winding is wound on outside aluminum matter pipeline；Described iron shell is coated on aluminum matter pipeline；Described flange welds It is connected on the two ends of aluminum matter pipeline；Described three-phase symmetrical current module connects described three-phase symmetric winding.

10. filtering with structure changes, electrify, separate, adsorbing and the oil strain method of rotating excitation field, its feature described in claim 1 It is: the bottom of described oil returning tube is provided with an overflow valve, bottom this overflow valve, is provided with an automatically controlled set screw；On described overflow valve Being provided with 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, in it passes through one Cylinder oil exit pipe and oil returning tube connect, and inner core oil exit pipe is provided with an automatically controlled check-valves；The center upright of described inner core is provided with Heart 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.