CN105864212A - Filtering method adopting wave suppression, magnetization, adsorption and rotating magnetic field - Google Patents

Abstract

The invention relates to a filtering method adopting wave suppression, magnetization, adsorption and a rotating magnetic field. A filter is used for attenuating pressure/flow pulsation of hydraulic oil, and the working-condition self-adaptive wave-suppression 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, enter an oil return barrel through an oil return barrel oil inlet pipe and then flow 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; 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, and therefore the service life of the filter element is prolonged.

Description

A kind of employing presses down ripple, magnetizes, adsorbs and the filter method of rotating excitation field

[technical field]

The present invention relates to a kind of hydraulic oil filtering method, be specifically related to a kind of employing and press down ripple, magnetize, adsorb and rotating excitation field Filter method, belong to technical field of hydraulic equipment.

[background technology]

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

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

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

Therefore, for solving above-mentioned technical problem, the employing of a kind of innovation of necessary offer presses down ripple, magnetizes, adsorbs and revolve Turn the filter method in magnetic 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 employing of length pressed down ripple, magnetized, adsorbs and the filter method of rotating excitation field service life.

For achieving the above object, the technical scheme that the present invention takes is: a kind of employing is pressed down ripple, magnetized, adsorbs and rotary magnetic Filter method, it uses a kind of defecator, 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 and end cap；Wherein, described wave filter, U-shaped separation of particles module, oil returning tube, outer barrel depend on Secondary it is placed on base plate；Described wave filter includes input pipe, shell, outlet tube, elastic thin-wall, H mode filter and the filter of cascaded H type Ripple device；Wherein, described input pipe is connected to one end of shell, and it extends in shell, itself and hydraulic oil inlet docking；Described Outlet tube is connected to the other end of shell, and it extends in shell, and itself and U-shaped separation of particles module are docked；Described elastic thin-wall Radial direction along shell is installed in shell；Described input pipe, outlet tube and elastic thin-wall are collectively forming a Double-pipe plug-in type filtering Device；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 by boring Shape elastic damping hole pipe and slot apertures form；Resonance series cavity volume I and parallel resonance is formed between described elastic thin-wall and shell Cavity volume；The outside of described resonance series cavity volume I sets a resonance series cavity volume II, described resonance series cavity volume I and resonance series is held Insert pipe by a taper between the II of chamber to connect；This taper inserts pipe near input tube side；Described H mode filter is positioned at and allies the communists Shaking in cavity volume, it is connected with taper structure changes damping hole；Described 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 H mode filter and cascaded H mode filter axially in It is symmetrical arranged, and forms connection in series-parallel H mode filter；Described U-shaped separation of particles module includes a U-tube, and U-tube is installed successively Temperature control module, magnetized module, the first adsorption module, rotating excitation field is had to be centrifuged module, the second adsorption module and demagnetization module；Institute The top stating U-shaped separation of particles module and oil returning tube is connected by an oil returning tube oil inlet pipe；Described inner core is placed in outer barrel, and it leads to If crossing a top board and bolt stem being installed on end cap；Described helical flow path is contained in inner core, itself and U-shaped separation of particles module Between by one inner core oil inlet pipe connect；Described inner core oil inlet pipe is positioned at oil returning tube oil inlet pipe, and extends into U-shaped separation of particles The central authorities of module, its diameter is less than oil returning tube oil inlet pipe diameter, and is coaxially disposed with oil returning tube oil inlet pipe；Described filter element is arranged on On the inwall of inner core, its precision is 1-5 micron；The bottom of said tub is provided with a hydraulic oil oil-out；

It comprises the steps:

1), the fluid in fluid pressure line passes through wave filter, the 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 temperature control module of U-shaped separation of particles module, by temperature control module regulation oil temperature to optimal Magnetization temperature 40-50 DEG C, enter magnetized module afterwards；

3), by magnetizing assembly, oil return is magnetized, make micron-sized metallic particles aggregate into bulky grain, deliver to afterwards First adsorption module；

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 employing of the present invention presses down ripple, magnetizes, adsorbs and the filter method of rotating excitation field is further: described input pipe and defeated Go out the axis of pipe 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 also Allying the communists and shake in cavity volume, its taper angle is 10 °；The Young's modulus of described taper structure changes damping hole cone shaped elastic damping hole pipe compares bullet Property thin-walled Young's modulus want big, can be with change in fluid pressure stretching or compression；The Young's modulus of slot apertures damps than cone shaped elastic The Young's modulus of hole pipe wants big, can be with fluid opened by pressure or closedown；Described taper is inserted the wider place of tube opening and is positioned at series connection altogether Shaking in cavity volume II, its taper angle is 10 °.

The employing of the present invention presses down ripple, magnetizes, adsorbs and the filter method of rotating excitation field is further: described temperature control module bag Include heater, cooler and temperature sensor；Described heater uses the lubricating oil heater of the Chongqing gold letter of band temperature detection； Remover for surface evaporation type air cooling selected by described cooler, and the finned tube of cooler selects KLM type finned tube；Temperature sensor uses platinum electricity Resistance temperature sensor.

The employing of the present invention presses down ripple, magnetizes, adsorbs and the filter method of rotating excitation field is further: described magnetized module bag Include aluminum matter pipeline, some windings, iron shell, flange and some magnetizing current output modules；Wherein, described some around component Not being wound on outside aluminum matter pipeline, each winding is made up of positive winding and inverse winding；Described iron shell is coated on aluminum matter pipeline；Described Flange welding is at the two ends of aluminum matter pipeline；Each magnetizing current output module is connected to a winding.

The employing of the present invention presses down ripple, magnetizes, adsorbs and the filter method of rotating excitation field is further: described first absorption mould Block and the second adsorption module all use homopolarity adjacent type absorbing ring, this homopolarity adjacent type absorbing ring to include aluminium ring shape pipeline, just To solenoid, reverse solenoid and irony magnetic conduction cap；Described forward solenoid and reverse solenoid are respectively arranged in aluminium ring In 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, its be positioned at forward solenoid and reverse solenoid adjacent, And forward solenoid and the intermediate point of reverse solenoid axis.

The employing of the present invention presses down ripple, magnetizes, adsorbs and the filter method of rotating excitation field is further: described first absorption mould Block and the second adsorption module all use the homopolarity adjacent type absorbing ring of charged hammer, the homopolarity adjacent type absorbing ring of this charged hammer Including 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 just Like pole is produced to solenoid and reverse solenoid adjacent；Described irony magnetic conduction cap is arranged in the inwall of aluminium ring shape pipeline On, 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 electricity Magnet connects and can promote electric shock hammer, makes electric shock hammer tap aluminium ring shape inner-walls of duct.

The employing of the present invention presses down ripple, magnetizes, adsorbs and the filter method of rotating excitation field is further: described rotating excitation field from Core module includes aluminum matter pipeline, iron shell, three-phase symmetric winding, flange 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 flange welding is the two of aluminum matter pipeline End；Described three-phase symmetrical current module connects described three-phase symmetric winding.

The employing of the present invention presses down ripple, magnetizes, adsorbs and the filter method of rotating excitation field is further: the end of described oil returning tube Portion 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 extraction Mouth is connected to a fuel tank by pipeline.

The employing of the present invention presses down ripple, magnetizes, adsorbs and the filter method of rotating excitation field is further: the bottom of described inner core In rounding mesa-shaped, 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 employing of the present invention presses down ripple, magnetizes, adsorbs and the filter method of rotating excitation field is also: the center upright of described inner core Be 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.

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 magnetic field intensity, make that the granule in fluid is force-magnetized is gathered into bulky grain, And promote colloidal particles decomposition to melt, form efficient absorption by adsorption module, by degaussing gear, residual particles demagnetization is kept away Exempt to endanger 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 that the employing of the present invention presses down ripple, magnetizes, adsorbs and the structural representation of defecator of rotating excitation field.

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

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

Fig. 4 is H mode filter schematic diagram in Fig. 3.

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

Fig. 6 is H mode filter and cascaded H mode filter frequency characteristic constitutional diagram.Wherein, solid line is cascaded H mode filter Frequency characteristic.

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

Fig. 8 is the structural representation of Double-pipe plug-in type wave filter.

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

Figure 10 is the schematic diagram of taper structure changes damping hole in Fig. 2.

Figure 10 (a) to Figure 10 (c) is the working state figure of taper structure changes damping hole.

Figure 11 is the schematic diagram of the U-shaped separation of particles module in Fig. 1.

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

Figure 13 is the structural representation of the winding in Figure 12.

Figure 14 is the circuit diagram of the magnetizing current output module in Figure 12.

Figure 15 is the structural representation that the first adsorption module (the second adsorption module) is homopolarity adjacent type absorbing ring of Figure 11.

Figure 16 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 17 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 17, the present invention uses for one and presses down ripple, magnetizes, adsorbs and rotary magnetic The defecator of field, it is by base plate 6, wave filter 8, U-shaped separation of particles module 3, oil returning tube 7, inner core 15, helical flow path 17, filter Several parts compositions such as core 18, outer barrel 19 and end cap 25.Wherein, described wave filter 8, U-shaped separation of particles module 2, oil returning tube 7, Outer barrel 19 is sequentially placed on base plate 6.

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

Wherein, described input pipe 81 is connected to one end of shell 89, and it extends in shell 88, itself and a hydraulic oil inlet 1 docking；Described outlet tube 811 is connected to the other end of shell 89, and it extends in shell 88, itself and U-shaped separation of particles module 3 Docking.Described elastic thin-wall 87 is installed in shell 88 along the radial direction of shell.The axis of described input pipe 81 and outlet tube 89 is not On the same axis, the filter effect of more than 10% can so be improved.

Described input pipe 81, outlet tube 89 and elastic thin-wall 87 are collectively forming a two-tube slip-on filter, thus decay Hydraulic system high frequency pressure pulsations.The filter transmission coefficient obtained after processing by lumped-parameter method is:

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

Velocity of sound ρ fluid density d in a medium₁Input pipe diameter Z characteristic impedance

$Z=\frac{1}{\frac{1}{Z_1}+\frac{1}{Z_2}+\frac{1}{Z_3}}$

$Z_1=\frac{{\mathrm{\ρl}}_{1}s}{\frac{\mathrm{\π}}{4}(D^2-{d_1}^2)}+\frac{{\mathrm{\ρa}}^2}{\frac{\mathrm{\π}}{4}(D^2-{d_1}^2)l_{1}s}$

$Z_2=\frac{\mathrm{\ρ}Ls}{\frac{\mathrm{\π}}{4}{D}^2}+\frac{{\mathrm{\ρa}}^2}{\frac{\mathrm{\π}}{4}{D}^{2}Ls}$

$Z_3=\frac{{\mathrm{\ρl}}_{2}s}{\frac{\mathrm{\π}}{4}(D^2-{d_2}^2)}+\frac{{\mathrm{\ρa}}^2}{\frac{\mathrm{\π}}{4}(D^2-{d_2}^2)l_{2}s}$

d₂Outlet tube diameter D cavity volume diameter l₁Input inserts length of tube l₂Outfan inserts length of tube L cavity volume total length and input outfan insert the difference of length of tube sum

From above formula, Double-pipe plug-in type cavity volume wave filter is similar with the electric capacity effect in circuit.The pressure of different frequency When pulsating wave is by this wave filter, transmission coefficient is different with frequency.Frequency is the highest, then transmission coefficient is the least, and this shows high frequency Pressure pulse wave decay the most severe when device after filtering, thus serve eliminate high frequency pressure pulsations effect.

The design principle of described Double-pipe plug-in type wave filter is as follows: when in pipeline, the fluctuating frequency of pressure is higher, pressure oscillation Act on convection cell on fluid and produce pinch effect.When the flow of change enters Double-pipe plug-in type cavity volume by input pipe, liquid Stream exceedes average discharge, and the cavity volume of expansion can absorb unnecessary liquid stream, and releases liquid stream when less than average discharge, thus absorbs Pressure fluctuation 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, S type cavity volume is to pressure wave Dynamic damping capacity is more weak, flows into the periodically pulsing pressure continuous action of wave filter S type cavity volume inside and outside elastic thin-wall 87 On wall, owing to having between inside and outside wall, pillar is fixing to be connected, and inside and outside elastic thin-wall is done by the frequency of fluctuation pressure simultaneously and periodically shakes Dynamic, this forced vibration consumes the pressure fluctuation energy of fluid, thus realizes the filtering of Mid Frequency pressure.From the principle of virtual work, The ability that elastic thin-wall consumes fluid pulsation pressure energy is directly related with potential energy during its forced vibration and kinetic energy sum, in order to Improving Mid Frequency filtering performance, the radial design of elastic thin-wall is much larger than pipe radius, and the thickness of thin-walled is less, representative value For less than 0.1mm.

Further, form resonance series cavity volume I84 between described elastic thin-wall 87 and shell 88 and parallel resonance is held Chamber 85.The outside of described resonance series cavity volume I84 sets a resonance series cavity volume II83, described resonance series cavity volume I84 and series connection Inserting pipe 82 by a taper between resonance cavity volume II83 to connect, this taper insertion pipe 82, near input pipe 81 side, makes resonance hold Chamber I and II forms unsymmetric structure, to reduce wave filter natural reonant frequency.Described taper is inserted the wider place of pipe 82 opening and is positioned at In resonance series cavity volume II83, its taper angle is 10 °.Some taper structure changes are uniformly had in the axial direction of described elastic thin-wall 87 Damping hole 86.

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

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

Velocity of sound L in a medium₁The long D of damping hole₁Damping hole diameter

L₂Parallel resonance cavity volume height D₂Parallel resonance cavity volume diameter.

Described cascaded H mode filter 813 is positioned at resonance series cavity volume I84 and resonance series cavity volume II83, and it also and is bored Deformation structure damping hole 86 is connected.After processing by lumped-parameter method, two natural angular frequencies of cascaded H mode filter 813 are:

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

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

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

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

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

Described H mode filter 812 and cascaded H mode filter 813 are axially symmetrical set, and form the filtering of connection in series-parallel H type Device, for broadening frequency filtering scope and make overall structure more compact.The multiple connection in series-parallel H types of the present invention circumferentially interface distributions Wave filter (only depicts 2) in figure, separate with dividing plate 820 each other, and the resonance bands of these multiple wave filter is different, Whole medium and low frequency filtering frequency range can be covered, it is achieved the entire spectrum filtering of medium and low frequency section after combining comprehensively.

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

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

The present invention can also the pulsation decay of solid line operating mode self-adaptive pressure.When hydraulic system working conditions change, both executive components Suddenly stop or running, and when the opening of valve changes, the characteristic impedance of pipe-line system can be caused to undergo mutation, so that former pipe Pressure curve with change in location in time in road changes the most therewith, then the position of pressure peak also changes.Due to the present invention The axial length of wave filter be designed as pulsing wavelength, and the connection in series-parallel H mode filter group of wave filter more than system main pressure Cavity volume length, the length of Double-pipe plug-in type cavity volume wave filter and the length of elastic thin-wall and wave filter axial length equal, protect Demonstrate,prove pressure peak position to be constantly in the effective range of wave filter；And the taper structure changes of connection in series-parallel H mode filter Damping hole is opened on elastic thin-wall, is uniformly distributed in the axial direction so that pressure peak change in location is several to the performance of wave filter Not impact, it is achieved thereby that operating mode adaptive-filtering function.In view of three kinds of filter structure axial dimensions and wave filter phase When, 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 Double-pipe plug-in type wave filter by input pipe, and the cavity volume of expansion absorbs unnecessary liquid stream, completes The filtering of high frequency pressure pulsations；

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

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

4), the axial length of wave filter is designed as more than hydraulic system main pressure pulsation wavelength, and the filter of connection in series-parallel H type Ripple device length, Double-pipe plug-in type filter length and elastic thin-wall 87 length are equal with filter length, make pressure peak position It 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, and U-tube 31 is sequentially installed with temperature control module 32, magnetization Module the 33, first adsorption module 34, rotating excitation field are centrifuged module the 36, second adsorption module 37 and demagnetization module 35.

Described temperature control module 32 main purpose is to provide optimal magnetization temperature 40-50 DEG C, also for magnetized module 33 simultaneously Having the effect of fluid viscosity reduction concurrently, it includes heater, cooler and temperature sensor.Described heater uses band temperature detection The lubricating oil heater of Chongqing gold letter.Described cooler can be selected for remover for surface evaporation type air cooling, the advantage having water-cooled and air cooling concurrently, Good heat dissipation effect, uses light pipe, and fluid resistance is little；Cooler fin type is high wing, and finned tube selects KLM type finned tube, heat transfer Performance is good, and thermal contact resistance is little, and fin and pipe contact area are big, and closely, firmly, it is good to bear cold and hot sudden turn of events ability, fin in laminating Root weather-resistant performance is high；The bank of tubes number optimum of air cooler is 8.Described temperature sensor uses platinum resistance temperature sensing Device.

Described magnetized module 33 realizes the force-magnetized of metallic particles, and makes micron-sized metallic particles aggregate into big Grain, it is simple to subsequent adsorbtion separates.Magnetized module 32 it is also required to provide non-uniform magnetic-field simultaneously, enters the colloidal particles in hydraulic oil Row magnetization is decomposed, the microgranule making colloid particulate breakup be smaller particle size, pollution abatement.

Described magnetized module 33 is by aluminum matter pipeline 331, some windings 332, iron shell 333, flange 334 and some magnetic Galvanic current output module 335 forms.Wherein, described aluminum matter pipeline 331 makes fluid flow there through and by magnetization treatment, and aluminum Pcrmeability the lowest, can make pipeline 331 obtains higher magnetic field intensity.

Described some windings 332, rotating around outside aluminum matter pipeline 331, are coated insulation by the copper wire of a diameter of about 1.0mm Paint is made.Each winding 332 is all separate setting, is controlled by corresponding magnetizing current output module 335 respectively, Qi Zhong electricity Flow and need different according to system.Separate owing to often enclosing winding 332, its exit can cause the electric current that this coil forms Ring is not real " justifying ", but has individual breach, and this can cause the radial distribution of aluminum matter pipeline 331 internal magnetic field uneven, thus Affect magnetic efficiency.For solving this problem, the often circle winding 332 of this creation is all made up of positive winding 336 and inverse winding 337, mesh Be to produce the magnetic field in same polarity direction and to make up the magnetic field that breach causes unbalanced simultaneously.In positive winding and inverse winding Size of current is equal.Aluminum matter pipeline 331 axis direction is arranged with multipair forward and reverse winding, by different electric currents, in order to shape Become the non-uniform magnetic-field of aforementioned claim.

Described iron shell 333 is coated on aluminum matter pipeline 331, and the material of irony can mask most magnetic flux.Institute State flange 334 and be welded on the two ends of aluminum matter pipeline 331, and by flange flange 334 in U-tube 20.

Each magnetizing current output module 335 is connected to a winding 332, and it utilizes digital potentiometer real time modifying resistance Feature, it is achieved the real-time control of non-uniform magnetic-field.The circuit theory diagrams of described magnetizing current output module 335 can be found in accompanying drawing 5, Its digital potentiometer used is AD5206, has the defeated of 6 passages.Amplifier AD8601 and metal-oxide-semiconductor 2N7002 are real by negative feedback Show the output of high-precision voltage follow.Constant High-current output have employed the high voltage of Texas Instrument (TI), the fortune of big electric current Put OPA 549.

Described first adsorption module 34 is for adsorbing the big microgranule of magnetic polymeric after magnetized module 33 magnetizes, 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.

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

1), the fluid in fluid pressure line passes through wave filter 8, the high, medium and low frequency range that wave filter 8 is decayed in hydraulic system Fluctuation pressure, and suppression flowed fluctuation；

2), backflow force feed enters the temperature control module 32 of U-shaped separation of particles module 3, regulates oil temperature by temperature control module 32 To optimal magnetization temperature 40-50 DEG C, enter magnetized module 33 afterwards；

3), by magnetized module 33, oil return is magnetized, make micron-sized metallic particles aggregate into bulky grain, send afterwards To the first adsorption module 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. an employing presses down ripple, magnetizes, adsorbs and the filter method of rotating excitation field, it is characterised in that: it uses and a kind of filters dress Putting, 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 Lid；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 defeated Enter pipe, shell, outlet tube, elastic thin-wall, H mode filter and cascaded H mode filter；Wherein, outside described input pipe is connected to One end of shell, it extends in shell, itself and hydraulic oil inlet docking；Described outlet tube is connected to the other end of shell, its Extending in shell, itself and U-shaped separation of particles module are docked；Described elastic thin-wall is installed in shell along the radial direction of shell；Institute State input pipe, outlet tube and elastic thin-wall and be collectively forming a two-tube slip-on filter；The axial of described elastic thin-wall goes up uniformly Have some taper structure changes damping holes；Described taper structure changes damping hole is made up of cone shaped elastic damping hole pipe and slot apertures；Institute State and between elastic thin-wall and shell, form resonance series cavity volume I and parallel resonance cavity volume；The outside of described resonance series cavity volume I If a resonance series cavity volume II, insert pipe by a taper between described resonance series cavity volume I and resonance series cavity volume II and connect； This taper inserts pipe near input tube side；Described H mode filter is positioned at parallel resonance cavity volume, itself and taper structure changes damping hole It is connected；Described cascaded H mode filter is positioned at resonance series cavity volume I and resonance series cavity volume II, its also with taper structure changes Damping hole is connected；Described H mode filter and cascaded H mode filter are axially symmetrical set, and form the filtering of connection in series-parallel H type Device；Described U-shaped separation of particles module includes a U-tube, and U-tube is sequentially installed with temperature control module, magnetized module, the first absorption Module, rotating excitation field are centrifuged module, the second adsorption module and demagnetization module；Described U-shaped separation of particles module and oil returning tube Top is connected by an oil returning tube oil inlet pipe；Described inner core is placed in outer barrel, if it is installed on by a top board and bolt stem On end cap；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 return Cylinder 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, 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 temperature control module of U-shaped separation of particles module, by temperature control module regulation oil temperature to optimal magnetic Change temperature 40-50 DEG C, enter magnetized module afterwards；

3), by magnetizing assembly, oil return is magnetized, make micron-sized metallic particles aggregate into bulky grain, deliver to first afterwards Adsorption module；

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. as claimed in claim 1 employing is pressed down ripple, is magnetized, adsorbs and the filter method of rotating excitation field, it is characterised in that: 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 poplar of described taper structure changes damping hole cone shaped elastic damping hole pipe The Young's modulus of family name's modular ratio elastic thin-wall wants big, can be with change in fluid pressure stretching or compression；The Young's modulus of slot apertures is than cone The Young's modulus of shape elastic damping hole pipe wants big, can be with fluid opened by pressure or closedown；The wider place of tube opening is inserted in described taper Being positioned at resonance series cavity volume II, its taper angle is 10 °.

3. as claimed in claim 1 employing is pressed down ripple, is magnetized, adsorbs and the filter method of rotating excitation field, it is characterised in that: described Temperature control module includes heater, cooler and temperature sensor；Described heater uses the profit of the Chongqing gold letter of band temperature detection Lubricating oil heater；Remover for surface evaporation type air cooling selected by described cooler, and the finned tube of cooler selects KLM type finned tube；Temperature passes Sensor uses platinum resistance temperature sensor.

4. as claimed in claim 1 employing is pressed down ripple, is magnetized, adsorbs and the filter method of rotating excitation field, it is characterised in that: described Magnetized module includes aluminum matter pipeline, some windings, iron shell, flange and some magnetizing current output modules；Wherein, described Some windings are rotating around outside aluminum matter pipeline, and each winding is made up of positive winding and inverse winding；Described iron shell is coated on aluminum matter On pipeline；Described flange welding is at the two ends of aluminum matter pipeline；Each magnetizing current output module is connected to a winding.

5. as claimed in claim 1 employing is pressed down ripple, is magnetized, adsorbs and the filter method of rotating excitation field, it is characterised in that: described First adsorption module and the second adsorption module all use homopolarity adjacent type absorbing ring, this homopolarity adjacent type absorbing ring to include 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.

6. as claimed in claim 1 employing is pressed down ripple, is magnetized, adsorbs and the filter method of rotating excitation field, it is characterised in that: described First adsorption module and the second adsorption module all use 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.

7. the employing described in claim 1 presses down ripple, magnetizes, adsorbs and the filter method of rotating excitation field, it is characterised in that: described rotation Turn magnetic field to be centrifuged module and include aluminum matter pipeline, iron shell, three-phase symmetric winding, flange and three-phase symmetrical current module；Institute State three-phase symmetric winding to be wound on outside aluminum matter pipeline；Described iron shell is coated on aluminum matter pipeline；Described flange welding is in aluminum matter The two ends of pipeline；Described three-phase symmetrical current module connects described three-phase symmetric winding.

8. the employing described in claim 1 presses down ripple, magnetizes, adsorbs and the filter method of rotating excitation field, it is characterised in that: described time The bottom of oil 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 extraction Mouthful, this oil drain out is connected to a fuel tank by pipeline.

9. the employing described in claim 1 presses down ripple, magnetizes, adsorbs and the filter method of rotating excitation field, it is characterised in that: in described The bottom of cylinder 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 non-return Valve.

10. the employing described in claim 1 presses down ripple, magnetizes, adsorbs and the filter method of rotating excitation field, it is characterised in that: described The center upright of inner core is provided with a hollow cylinder, hollow cylinder be arranged over pressure difference indicator, this pressure difference indicator is installed on On end cap；Described inner core oil inlet pipe and the tangent connection of helical flow path.