CN105736521A - Oil filtering method adopting filter for magnetizing, adsorbing and centrifuging - Google Patents

Abstract

The invention relates to an oil filtering method adopting a filter for magnetizing, adsorbing and centrifuging. Pressure/flow pulsation of hydraulic oil is attenuated by the filter; a full-frequency-band hydraulic system press fluctuation filter is adopted; solid particles can be separated by a U-shaped particle separation module, so that the solid particles in the oil liquid move to the pipe wall, enter an oil returning cylinder via an oil inlet pipe of the oil returning cylinder, and then return to an oil tank; the oil liquid containing a trace amount of small-sized particles in the center of the pipeline enters the inner cylinder via an oil inlet pipe of the inner cylinder and is subjected to high-accuracy filtration, so that the service life of a filter element is prolonged; the oil liquid entering the oil inlet pipe of the inner cylinder flows into a spiral flowing channel in a tangential flowing manner; the inner cylinder wall is the filter element; the filtrate flows close to the filter element under the action of the centrifugal force; the filtrate rapidly flows parallel to the surface of the filter element; the filtered hydraulic oil flows out of an outer cylinder in a direction perpendicular to the surface of the filter element; the polluted particles deposited at the bottom of the inner cylinder can be regularly discharged out of the oil returning cylinder via an electric control check valve; the service life of the filter element is prolonged.

Description

A kind of adopt wave filter, magnetization, absorption and centrifugal oil strain method

[technical field]

The present invention relates to a kind of hydraulic oil filtering method, be specifically related to a kind of adopt wave filter, magnetization, absorption and centrifugal oil strain method, belong to technical field of hydraulic equipment.

[background technology]

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

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

But, the high pressure filter that existing hydraulic system uses has the disadvantage that the cleannes of fluid are required different by (1) all kinds of Hydraulic Elements, the size of the solid particle in fluid is also different, need for this diverse location in hydraulic system that multiple dissimilar wave filter are installed, thus bring cost and the problem installing complexity；(2) filter in hydraulic system mainly adopts cake filtration mode, during filtration, filtrate is perpendicular to filter element surface flowing, trapped solid particle forms filter cake progressive additive, and the rate of filtration is also gradually reduced therewith until filtrate stops flowing out, and reduces the service life of filter element.

Therefore, for solving above-mentioned technical problem, the employing wave filter of a kind of innovation of necessary offer, magnetization, absorption and centrifugal oil strain method, 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 are high, the employing wave filter of long service life, magnetization, absorption and centrifugal oil strain method.

For achieving the above object, the technical scheme that the present invention takes is: a kind of adopt wave filter, magnetization, absorption and centrifugal oil strain method, it adopts a kind of oil-filtering apparatus, and this device includes base plate, wave filter, U-shaped separation of particles module, oil returning tube, inner core, helical flow path, filter element, outer barrel and end cap；Wherein, described wave filter, U-shaped separation of particles module, oil returning tube, outer barrel are sequentially placed on base plate；Described wave filter includes input pipe, shell, outlet tube, elastic thin-wall, plug-in type H mode filter and plug-in type cascaded H mode filter；Wherein, described input pipe is connected to one end of shell, and it extends in shell, and itself and a hydraulic oil inlet are docked；Described outlet tube is connected to the other end of shell, and it extends in shell, and itself and U-shaped separation of particles module are docked；Described elastic thin-wall is installed in shell along the radial direction of shell；Described input pipe, outlet tube and elastic thin-wall are collectively forming a two-tube slip-on filter；Resonance series cavity volume I, resonance series cavity volume II and parallel resonance cavity volume is formed between described elastic thin-wall and shell；Separated by an elastic baffle between described resonance series cavity volume I and resonance series cavity volume II；Described elastic thin-wall axially uniformly have some conical damping holes；Described elastic baffle is provided with taper near input tube side and inserts pipe, and pipe connection resonance series cavity volume I and resonance series cavity volume II is inserted in described taper；Described plug-in type H mode filter is positioned at parallel resonance cavity volume, and it is connected with conical damping hole；Described plug-in type cascaded H mode filter is positioned at resonance series cavity volume I and resonance series cavity volume II, and it is also connected with conical damping hole；Described plug-in type H mode filter and plug-in type cascaded H mode filter are axially symmetrical set, and form plug-in type connection in series-parallel H mode filter；Described U-shaped separation of particles module includes a U-tube, and U-tube is sequentially installed with temperature control module, magnetized module, mechanical centrifugal module, adsorption module and demagnetization module；Connecting above through an oil returning tube oil inlet pipe of described U-shaped separation of particles module and oil returning tube；Described inner core is placed in outer barrel, and it is installed on end cap by a top board and some bolts；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, its diameter less than oil returning tube oil inlet pipe diameter, and and oil returning tube oil inlet pipe be coaxially disposed；Described filter element is arranged on the inwall of inner core, and its precision is 1-5 micron；The bottom of said tub is provided with a hydraulic oil oil-out；

It comprises the steps:

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

2), backflow force feed enters the temperature control module of U-shaped separation of particles module, regulates oil temperature to best magnetization temperature 40-50 DEG C by temperature control module, enters magnetized module afterwards；

3), make the metallic particles in fluid be magnetized in magnetic field by magnetizing assembly, and make micron-sized metallic particles aggregate into bulky grain；Enter mechanical centrifugal module afterwards；

4), magnetization aggregated particles is centrifugal in mechanical centrifugal module；

5) after mechanical centrifugal module is centrifugal, the magnetization big microgranule of polymerization of near-wall, it is gathered in by adsorption module absorption；Enter demagnetization module afterwards；

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

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

8), the fluid carrying little particle diameter microgranule flows into the helical flow path of inner core in the way of tangential influent stream, and fluid is close to filter core flow under the influence of centrifugal force, and carries out high-precision filtration；

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

Adopt wave filter, magnetization, absorption and the centrifugal oil strain method of the present invention be further: the axis of described input pipe and outlet tube is not on the same axis；The described wider place of conical damping hole opening is positioned at resonance series cavity volume I and parallel resonance cavity volume, and its taper angle is 10 °；Described taper is inserted the wider place of tube opening and is positioned at resonance series cavity volume II, and its taper angle is 10 °；The inner side of described elastic thin-wall is provided with colloid damping layer；The internal layer of described colloid damping layer and outer layer respectively outer layer elastic thin-wall and internal layer elastic thin-wall, connected by some pillars are fixing between outer layer elastic thin-wall and internal layer elastic thin-wall；Being filled with the pure water adding antifreezing agent in interlayer between described outer layer elastic thin-wall and internal layer elastic thin-wall, pure water inner suspension has Bio-sil；Described colloid damping layer is connected with shell near one end of outlet tube；Described colloid damping layer is provided with a piston near one end of outlet tube.

Adopt wave filter, magnetization, absorption and the centrifugal oil strain method of the present invention be further: described temperature control module includes heater, cooler and temperature sensor；Described heater adopts the lubricating oil heater of the Chongqing gold letter with 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 adopts platinum resistance temperature sensor.

Adopt wave filter, magnetization, absorption and the centrifugal oil strain method of the present invention be further: 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 pipeline；Described flange welding is at the two ends of aluminum matter pipeline；Each magnetizing current output module is connected to a winding.

Adopt wave filter, magnetization, absorption and the centrifugal oil strain method of the present invention be further: described mechanical centrifugal module adopts the centrifugal module of eddy flow；The centrifugal module of described eddy flow includes eddy flow tube wall, the first flow deflector, the second flow deflector, motor and flow transducer；Wherein, described first flow deflector is provided with 3, and these 3 first flow deflectors are uniformly distributed along tube wall inner periphery every 120 °, and its laying angle is set to 18 °；Described second flow deflector and the first flow deflector structure are identical, after it is arranged on the first flow deflector, and and the first flow deflector stagger 60 ° and be connected in tube wall, its laying angle is set to 36 DEG C；The long limit of described first flow deflector is connected with tube wall, and minor face extends along the axis of tube wall；Its leading edge frustrates into obtuse, and trailing edge is processed into wing, and it is highly 0.4 times of tube wall diameter, and length is 1.8 times of tube wall diameter；Described motor connects and drives the first flow deflector and the second flow deflector, to regulate laying angle；Described flow transducer is arranged on the central authorities in tube wall.

Adopt wave filter, magnetization, absorption and the centrifugal oil strain method of the present invention be further: described adsorption module specifically adopts the adjacent type absorbing ring of homopolarity, and the adjacent type absorbing ring of this homopolarity includes aluminium ring shape pipeline, forward solenoid, reverse solenoid and irony magnetic conduction cap；Described forward solenoid and reverse solenoid are respectively arranged in aluminium ring shape pipeline, and both are connected with electric current in opposite direction so that forward solenoid and reverse solenoid adjacent produce like pole；Described irony magnetic conduction cap is arranged on the inwall of aluminium ring shape pipeline, and it is positioned at forward solenoid and the intermediate point of reverse solenoid adjacent and forward solenoid and reverse solenoid axis.

Adopt wave filter, magnetization, absorption and the centrifugal oil strain method of the present invention be further: described adsorption module specifically adopts the adjacent type absorbing ring of homopolarity of charged hammer, and the adjacent type absorbing ring of homopolarity of this charged hammer includes aluminium ring shape pipeline, forward solenoid, reverse solenoid, irony magnetic conduction cap, dividing plate, electric shock hammer and electric magnet；Described forward solenoid and reverse solenoid are respectively arranged in aluminium ring shape pipeline, and both are connected with electric current in opposite direction so that forward solenoid and reverse solenoid adjacent produce like pole；Described irony magnetic conduction cap is arranged on the inwall of aluminium ring shape pipeline, and it is positioned at forward solenoid and the intermediate point of reverse solenoid adjacent and forward solenoid and reverse solenoid axis；Described dividing plate is between forward solenoid and reverse solenoid；Described electric shock hammer and electric magnet are between dividing plate；Described electric magnet connects and can promote electric shock hammer, makes electric shock hammer knock aluminium ring shape inner-walls of duct.

Adopt wave filter, magnetization, absorption and the centrifugal oil strain method of the present invention be further: the bottom of described oil returning tube is provided with an overflow valve, is provided with an automatically controlled set screw bottom this overflow valve；Described overflow valve is provided with an oil drain out, and this oil drain out is connected to a fuel tank by pipeline.

Adopt wave filter, magnetization, absorption and the centrifugal oil strain method of the present invention be further: the bottom of described inner core be rounding mesa-shaped, and it is by an inner core oil exit pipe and oil returning tube connection, and inner core oil exit pipe is provided with an automatically controlled check-valves.

Adopt wave filter, magnetization, absorption and the centrifugal oil strain method of the present invention be also: the center upright of described inner core is provided with a hollow cylinder, hollow cylinder be arranged over pressure difference indicator, this pressure difference indicator is installed on end cap；Described inner core oil inlet pipe and the tangent connection of helical flow path.

Compared with prior art, there is advantages that

1. pulsed by the pressure/flow of filter attenuation hydraulic oil, make filter element operationally not vibrate, to improve strainability；Hydraulic oil realizes the separation of solid particle in U-shaped separation of particles module, make solid particle in fluid to vessel wall motion, at U-shaped separation of particles module outlet place, fluid rich in the near-wall of solid particle passes through to be back to fuel tank after oil returning tube oil inlet pipe enters oil returning tube, only then enter inner core by inner core oil inlet pipe containing the fluid of the pipeline center of the little particle diameter microgranule of trace and carry out high-precision filtration, improve the service life of filter element, reduce filtering cost and complexity；The fluid entering inner core oil inlet pipe flows into the helical flow path of inner core in the way of tangential influent stream, inner tube wall is filter element, then filtrate is close to filter core flow under the influence of centrifugal force, filtrate is parallel to the surface of filter element and quickly flows, hydraulic oil after filtration is then perpendicular to cartridge surface direction and flows out to urceolus, the microgranule of cartridge surface is implemented to sweep stream effect by this cross flow filter type, inhibit 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 improving filter element service life.

2. by controlling temperature and the magnetic field intensity of hydraulic oil, make that the granule in fluid is force-magnetized is gathered into bulky grain, and promote colloidal particles decomposition to melt, efficient absorption is formed by adsorption module, by residual particles demagnetization being avoided harm Hydraulic Elements by degaussing gear, 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, it is necessary to multipair forward and reverse coil to and by different size of electric current, and current values can digital setting online.

[accompanying drawing explanation]

Fig. 1 is the structural representation adopting wave filter, magnetization, absorption and centrifugal oil-filtering apparatus of the present invention.

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

Fig. 3 is the profile in Fig. 1 along A-A.

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

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

Fig. 6 is plug-in type H mode filter and plug-in type cascaded H mode filter frequency characteristic constitutional diagram.Wherein, solid line is plug-in type cascaded H mode filter frequency characteristic.

Fig. 7 is plug-in type 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 Longitudinal cross section schematic of colloid damping layer.

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 adsorption module of Figure 11 is the structural representation of the adjacent type absorbing ring of homopolarity.

Figure 16 is the adsorption module in Figure 11 is the structural representation of the adjacent type absorbing ring of homopolarity of charged hammer.

Figure 17 is the horizontal schematic diagram of the mechanical centrifugal module of Figure 11.

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

[detailed description of the invention]

Refer to shown in Figure of description 1 to accompanying drawing 18, the present invention a kind of adopts wave filter, magnetization, absorption and centrifugal oil-filtering apparatus, and it is made up of several parts such as base plate 6, wave filter 8, U-shaped separation of particles module 3, oil returning tube 7, inner core 15, helical flow path 17, filter element 18, outer barrel 19 and end caps 25.Wherein, described wave filter 8, U-shaped separation of particles module 2, oil returning tube 7, outer barrel 19 are sequentially placed on base plate 6.

Described wave filter 8 is for inputting hydraulic oil, and the fluctuation pressure of the high, medium and low frequency range that can decay in hydraulic system, and suppresses flowed fluctuation.Described wave filter 8 is made up of several parts such as input pipe 81, shell 89, outlet tube 811, elastic thin-wall 87, plug-in type H mode filter 812 and plug-in type cascaded H mode filters 813.

Wherein, described input pipe 81 is connected to one end of shell 89, and it extends into the length in shell 89 is l1, and itself and a hydraulic oil inlet 1 are docked；Described outlet tube 811 is connected to the other end of shell 89, and it extends into the length in shell 89 is l2, and itself and U-shaped separation of particles module 3 are docked.Described elastic thin-wall 87 is installed in shell 89 along the radial direction of shell.The axis of described input pipe 81 and outlet tube 811 not on the same axis, so can improve the filter effect of more than 10%.

Described input pipe 81, outlet tube 811 and elastic thin-wall 87 are collectively forming a two-tube slip-on filter, thus hydraulic system high frequency pressure pulsations of decaying.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 the difference of input outfan insertion length of tube sum.

From above formula, Double-pipe plug-in type cavity volume wave filter is similar with the electric capacity effect in circuit.When the pressure pulse wave of different frequency is by this wave filter, transmission coefficient is different with frequency.Frequency is more high, then transmission coefficient is more little, and this shows that the pressure pulse wave of high frequency is decayed more severe when device after filtering, thus serving the effect eliminating high frequency pressure pulsations.

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, and pressure oscillation acts on convection cell on fluid and produces 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 lower than average discharge, thus absorption pressure pulsation energy.

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

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

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

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

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

Substitute into actual parameter, above formula is carried out simulation analysis it is found that the natural frequency of elastic thin-wall 87 is generally high than the natural frequency of H mode filter, and its attenuation band is also wide than H mode filter.In relatively wide frequency band range, pressure fluctuation is had good attenuating by elastic thin-wall.Meanwhile, the elastic thin-wall radius in the filter construction of the present invention is bigger and relatively thin, and its natural frequency is closer to Mid Frequency, it may be achieved 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, Double-pipe plug-in type cavity volume wave filter is more weak to the damping capacity of pressure oscillation, flow into the periodically pulsing pressure continuous action of Double-pipe plug-in type cavity volume on the inside and outside wall of elastic thin-wall, owing to having between inside and outside wall, pillar is fixing to be connected, inside and outside elastic thin-wall does periodic vibration by the frequency of fluctuation pressure simultaneously, this forced vibration consumes the pressure fluctuation energy of fluid, thus realizing the filtering of Mid Frequency pressure.From the principle of virtual work, potential energy and kinetic energy sum when elastic thin-wall consumes the ability of fluid pulsation pressure energy with its forced vibration are directly related, in order to improve Mid Frequency filtering performance, the radial design of elastic thin-wall is much larger than pipe radius, and the thickness of thin-walled is less, representative value is less than 0.1mm.

Further, resonance series cavity volume I84, resonance series cavity volume II83 and parallel resonance cavity volume 85 is formed between described elastic thin-wall 87 and shell 89, described cavity volume 83,84,85 is across whole wave filter, it is hereby achieved that bigger resonance cavity volume volume, strengthens attenuating.Separated by an elastic baffle 810 between described resonance series cavity volume I84 and resonance series cavity volume II5.Described elastic thin-wall 87 axially uniformly have some conical damping holes 86, the wider place of described conical damping hole 86 opening is positioned at resonance series cavity volume I84 and parallel resonance cavity volume 85, and its taper angle is 10 °.Described elastic baffle 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 resonance series cavity volume II83.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 plug-in type H mode filter 812 is positioned at parallel resonance cavity volume 85, and it is connected with conical damping hole 86.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, and it is also connected with conical 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 plug-in type connection in series-parallel H mode filter, for broadening frequency filtering scope and make overall structure more compact.This creates the circumferentially multiple plug-in type connection in series-parallel H mode filters (only depicting 2 in figure) of interface distributions, separates with dividing plate 820 each other.

All can be found by Fig. 6 plug-in type H mode filter and plug-in type cascaded H mode filter frequency characteristic and formula (1) (2) (3), plug-in type cascaded H mode filter has 2 natural angular frequencies, better at crest place filter effect, then it is substantially free of filter effect at trough place；Plug-in type H mode filter has 1 natural angular frequency, better at crest place filter effect equally, is then substantially free of filter effect at trough place；Select suitable filter parameter, the natural angular frequency making plug-in type H mode filter just drops between 2 natural angular frequencies of plug-in type cascaded H mode filter, as shown in Figure 7, both in certain frequency range, defined the natural reonant frequency peak value of 3 next-door neighbours, in this frequency range, no matter the fluctuating frequency of pressure is in crest place or trough place all can guarantee that good filter effect.The bank of filters that multiple plug-in type connection in series-parallel H mode filters are constituted both can cover whole medium and low frequency section, it is achieved the entire spectrum filtering of medium and low frequency section.

The inner side of described elastic thin-wall 87 is provided with colloid damping layer 88.The internal layer of described colloid damping layer 88 and outer layer respectively outer layer elastic thin-wall 81 and internal layer elastic thin-wall 82, connected by some pillars 814 are fixing between outer layer elastic thin-wall 81 and internal layer elastic thin-wall 82.Being filled with the pure water 816 adding antifreezing agent in interlayer between outer layer elastic thin-wall 81 and internal layer elastic thin-wall 82, pure water 816 inner suspension has Bio-sil 815.Described colloid damping layer 88 is connected with shell 89 near one end of outlet tube 811；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 only small and is connected by pillar 814 is fixing, when pressure fluctuation acts perpendicularly to thin-walled, inside and outside wall produces to be close to consistent deformation, and colloid damping layer thickness is kept approximately constant, and pressure fluctuation is not had damping action；The flow pulsation in 817 sensation level directions of piston of colloid damping layer 88, when flow pulsation strengthens, piston 817 pressurized makes colloid damping layer shrink, and squeezing action makes the water in colloid damping layer 88 be entered micron order central void by nanoscale transfer passage；When flow pulsation weakens, piston 817 is by back-pressure, and now colloid damping layer expands, and the water in colloid damping layer is discharged from central void through passage.In the process, due to the mechanics effect of silica gel 815 microchannel sorption, channel surface molecular scale roughness effect and chemistry heterogeneous body effect, piston follows the interfactial work that colloid damping layer shrinks and does " gas-liquid-solid " border in expansion process, thus flow systolic implementation is decayed, it is a parallel R mode filter substantially.This wave filter is in that relative to the advantage of general liquid condenser: it is decayed flow pulsation by the mode of the interfactial work on " gas-liquid-solid " border, a large amount of mechanical energy can be absorbed when not producing heat, and energy expenditure does not rely on piston speed, extinction efficiency is obviously improved.

The present invention can also the pulsation decay of solid line operating mode self-adaptive pressure.When hydraulic system working conditions change, both executive component stopped suddenly or ran, and when the opening of valve changes, can cause that the characteristic impedance of pipe-line system is undergone mutation, so that former pipeline pressure also changes therewith with the curve of change in location in time, then the position of pressure peak also changes.Owing to the axial length of the wave filter of the present invention is designed as more than system main pressure pulsation wavelength, and the cavity volume length of plug-in type connection in series-parallel H mode filter group of wave filter, 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, it is ensured that pressure peak position is constantly in the effective range of wave filter；And the conical damping hole of plug-in type connection in series-parallel H mode filter is opened on elastic thin-wall, be uniformly distributed in the axial direction so that pressure peak change in location on the performance of wave filter almost without impact, it is achieved thereby that operating mode adaptive-filtering function.Considering that three kinds of filter structure axial dimensions and wave filter are suitable, this bigger size also ensure that hydraulic filter possesses stronger pressure fluctuation damping capacity.

The method that the pressure fluctuation restraining device adopting 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 filtering of intermediate frequency pressure fluctuation；

3), by plug-in type connection in series-parallel H mode filter group, insert pipe by conical damping hole, taper and fluid produces resonance, consume pulsation energy, complete the filtering of low frequency pulsation；

4), the axial length of wave filter is designed as more than hydraulic system main pressure pulsation wavelength, and plug-in type connection in series-parallel H mode filter length, Double-pipe plug-in type filter length and elastic thin-wall 87 length are equal with filter length, pressure peak position is made to be constantly in the effective range of wave filter, it is achieved the filtering of pressure fluctuation when system condition changes.

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, magnetized module 33, adsorption module 34, mechanical centrifugal module 36 and demagnetization module 35.

Described temperature control module 32 main purpose is to provide magnetization temperature 40-50 DEG C of the best for magnetized module 33, also has the effect of fluid viscosity reduction concurrently simultaneously, and it includes heater, cooler and temperature sensor.Described heater adopts the lubricating oil heater of the Chongqing gold letter with temperature detection.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, adopts light pipe, and fluid resistance is little；Cooler fin type is high wing, and finned tube selects KLM type finned tube, good heat-transfer, 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, and fin root weather-resistant performance is high in laminating；The bank of tubes number optimum of air cooler is 8.Described temperature sensor adopts platinum resistance temperature sensor.

Described magnetized module 33 realizes the force-magnetized of metallic particles, and makes micron-sized metallic particles aggregate into bulky grain, it is simple to subsequent adsorbtion separates.Magnetized module 32 it is also required to provide non-uniform magnetic-field simultaneously, the colloidal particles in hydraulic oil carries out magnetization and decomposes, the microgranule making colloid particulate breakup be less grain size, pollution abatement.

Described magnetized module 33 is made up of aluminum matter pipeline 331, some windings 332, iron shell 333, flange 334 and some magnetizing current output modules 335.Wherein, described aluminum matter pipeline 331 makes fluid flow there through and is subject to magnetization treatment, and the pcrmeability of aluminum is very low, it is possible to make to obtain in pipeline 331 higher magnetic field intensity.

Described some windings 332 are rotating around, outside aluminum matter pipeline 331, being made up of the copper wire coating insullac that diameter is about 1.0mm.Each winding 332 is all independent from setting, is controlled by corresponding magnetizing current output module 335 respectively, and wherein electric current needs different according to system.Separate owing to often enclosing winding 332, its exit can cause the electric current loop that this coil forms not to be real " circle ", but has individual breach, and this can cause the radial distribution of aluminum matter pipeline 331 internal magnetic field uneven, thus affecting 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, it is therefore an objective in order to produce the magnetic field in same polarity direction and to make up the magnetic field that breach causes unbalanced simultaneously.Size of current in positive winding and inverse winding is equal.Aluminum matter pipeline 331 axis direction is arranged with multipair forward and reverse winding, by different electric currents, in order to form 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.Described flange 334 is 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 the feature of digital potentiometer real time modifying resistance, it is achieved the real-time control of non-uniform magnetic-field.The circuit theory diagrams of described magnetizing current output module 335 can referring to accompanying drawing 5, and the digital potentiometer of its use is AD5206, has the defeated of 6 passages.Amplifier AD8601 and metal-oxide-semiconductor 2N7002 achieves the output of high-precision voltage follow by negative feedback.Constant High-current output have employed the amplifier OPA549 of the high voltage of Texas Instrument (TI), big electric current.

Described mechanical centrifugal module 36 makes the magnetization aggregated particles in fluid be thrown toward tube wall under the action of the centrifugal.Described mechanical centrifugal module 36 selects eddy flow to be centrifuged module 36, the centrifugal module 36 of this eddy flow adopts the mode of energy loss, its design principle is as follows: arrange the flow deflector of the distortion of certain altitude and length in the duct, and make blade face tangent line and axis angled, fluid can be made to produce spiral flow in pipes because pipe flow border changes, this spiral flow can be analyzed to the circumferential flow around pipe axle and axial straight flowing, and the particulate matter carried in fluid produces off-axis alignment heart screw.This eddy flow centrifugal device 36 is made up of several parts such as eddy flow tube wall the 361, first flow deflector the 362, second flow deflector 363, motor 364 and flow transducers 365.

Wherein, described first flow deflector 362 is provided with 3, these 3 first flow deflectors 362 are uniformly distributed along tube wall 361 inner periphery every 120 °, and its laying angle (angle between the first flow deflector 362 and eddy flow tube wall 361) is set to 18 °, to ensure best tangential flowing.Described second flow deflector 363 is identical with the first flow deflector 362 structure, after it is arranged on the first flow deflector 362, and and the first flow deflector 362 stagger 60 ° and be connected in tube wall 361, its laying angle is set to 36 DEG C, for reducing resistance and strengthening the intensity of circumferential flow.It addition, the 3rd or more flow deflector can be arranged equally again according to actual separation effect, laying angle gradually increases.Described motor 364 connects and drives the first flow deflector 362 and the second flow deflector 363, to regulate laying angle, thus better centrifugal effect can be obtained, knows and makes flow deflector 362,363 adapt to different operating modes.Described flow transducer 365 is arranged on the central authorities in tube wall 361, by the numerical analysis cyclonic separation effect of reading flow quantity sensor 365, and controlling motor 364 accordingly, motor 364 regulates the laying angle of each flow deflector 362,363, to obtain separating effect more.

Further, the long limit of described first flow deflector 362 is connected with tube wall 361, and minor face 363 extends along the axis of tube wall 361；For reducing resistance, its leading edge frustrates into obtuse；For avoiding streaming, trailing edge is processed into wing；It is highly 0.4 times of tube wall 361 diameter, makes the spiral flow of formation have bigger intensity；Length is 1.8 times of tube wall 361 diameter, to ensure the bigger sphere of action to fluid.

Described adsorption module 34 is for adsorbing the big microgranule of magnetic polymeric after mechanical centrifugal module 36 is centrifugal, it can adopt the adjacent type absorbing ring of homopolarity, and the adjacent type absorbing ring of this homopolarity is made up of parts such as aluminium ring shape pipeline 341, forward solenoid 342, reverse solenoid 343 and irony magnetic conduction caps 344.Wherein, described forward solenoid 342 and reverse solenoid 343 are respectively arranged in aluminium ring shape pipeline 341, and both are connected with electric current in opposite direction so that forward solenoid 342 and reverse solenoid 343 adjacent produce 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 solenoid 342 and reverse solenoid 343 adjacent and forward solenoid 342 and the intermediate point of reverse solenoid 343 axis.

The design principle of described homopolarity adjacent type absorbing ring is as follows: energising forward solenoid 342, reverse solenoid 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 produce like pole；Meanwhile, aluminium ring shape pipeline 341 can improve magnetic circuit, strengthens the magnetic field intensity at inner-walls of duct place, strengthens irony magnetic conduction cap 344 and granule is caught absorbability.Each forward solenoid 342, reverse solenoid 343 electric current can be different with concentration and change according to the size of granule, to obtain optimal adsorption performance.

Further, the adjacent type absorbing ring of homopolarity that described adsorption module 34 may be used without charged hammer, the adjacent type absorbing ring of homopolarity of this charged hammer is made up of parts such as aluminium ring shape pipeline 341, forward solenoid 342, reverse solenoid 343, irony magnetic conduction cap 344, dividing plate 345, electric shock hammer 346 and electric magnet 347.Wherein, described forward solenoid 342 and reverse solenoid 343 are respectively arranged in aluminium ring shape pipeline 341, and both are connected with electric current in opposite direction so that forward solenoid 342 and reverse solenoid 343 adjacent produce 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 solenoid 342 and reverse solenoid 343 adjacent and forward solenoid 342 and the intermediate point of reverse solenoid 343 axis.Described electric shock hammer 346 and electric magnet 347 are between dividing plate 345.Described electric magnet 347 connects and can promote electric shock hammer 346, makes electric shock hammer 346 knock aluminium ring shape pipeline 342 inwall.

The design principle of the homopolarity adjacent type absorbing ring of described charged hammer is as follows: energising forward solenoid 342, reverse solenoid 343, adjacent forward solenoid 342, reverse solenoid 343 are connected with electric current in opposite direction so that forward solenoid 342, reverse solenoid 343 adjacent produce like pole；Meanwhile, aluminium ring shape pipeline 341 can improve magnetic circuit, strengthens the magnetic field intensity at inner-walls of duct place, strengthens irony magnetic conduction cap 344 and granule is caught absorbability.Each forward solenoid 342, reverse solenoid 343 electric current can be different with concentration and change according to the size of granule, to obtain optimal adsorption performance.And by the setting of the hammer 346 that shocks by electricity, it is prevented that granule, at irony magnetic conduction cap 344 place bulk deposition, affects adsorption effect.Now, control electric shock hammer 346 by electric magnet 347 and knock the inwall of pipeline 341 so that adsorbed granule scatter to both sides.Meanwhile, when cleaning pipeline 341, knocking of electric shock hammer 346 can also improve cleaning performance.

Described demagnetization module 35 gives magnetized particles demagnetization, it is prevented that residual magnetism microgranule enters hydraulic circuit by oil returning tube oil inlet pipe, and sensitive to pollution Hydraulic Elements cause damage.

Connecting above through an oil returning tube oil inlet pipe 22 of described U-shaped separation of particles module 3 and oil returning tube 7；After being processed by U-shaped separation of particles module 3, the fluid of U-tube 31 near-wall, rich in aggregated particles, is back to fuel tank after entering oil returning tube 7 by oil returning tube oil inlet pipe 22.

The bottom of described oil returning tube 7 is provided with an overflow valve 8, is provided with an automatically controlled 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, and it is installed on end cap 25 by a top board 13 and some bolts 21.Described helical flow path 17 is contained in inner core 15, is connected by an inner core oil inlet pipe 12 between itself and U-shaped separation of particles module 3, specifically, and described inner core oil inlet pipe 12 and the tangent connection of helical flow path 17.The fluid of U-tube 31 pipeline center only containing the little particle diameter microgranule of trace, enters inner core 15 by inner core oil inlet pipe 12 and realizes high-precision filtration, separates thus realizing solid particle.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 and oil returning tube oil inlet pipe 22 be coaxially disposed.

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, and 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, is discharged by the hydraulic oil filtered by hydraulic oil oil-out 5.

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

It addition, traditional filter mainly adopts cake filtration mode, during filtration, filtrate is perpendicular to filter element surface flowing, trapped solid particle forms filter cake progressive additive, the rate of filtration is also gradually reduced therewith, until filtrate stops flowing out, reduces the service life of filter element.In this present invention, carry the filtrate of little particle diameter microgranule from inner core oil inlet pipe 12 in the way of tangential influent stream, flow into the helical flow path 17 of inner core 15, 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, filtrate is parallel to the surface of filter element 18 and quickly flows, hydraulic oil after filtration 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 is called cross flow and filters.The microgranule being gathered in filter element 18 surface is applied with shearing and sweeps stream effect by the quickly flowing of filtrate, thus inhibiting the increase of filter cake thickness, make rate of filtration near constant, filter pressure without raising with the passing of time, service life of filter element thus increase substantially.Accumulation along with filtration time, it is deposited on the pollution granule bottom inner core 15 inverted round stage to be stepped up, the rate of filtration slowly declines, in inner core 15, unfiltered filtrate rises along the hollow cylinder 16 at center, now, pressure difference indicator 14 works, monitor 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 under differential pressure action, to be discharged to oil returning tube 7 by inner core oil exit pipe 23 containing the filtrate of more pollution granule bottom inner core 15, avoid bottom filter element 18 blockage to worsen, thus extending filter element 18 service life.

Adopt above-mentioned oil-filtering apparatus that backflow is pressed with the processing step of process as follows:

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

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

3), make the metallic particles in fluid be magnetized in magnetic field by magnetized module 33, and make micron-sized metallic particles aggregate into bulky grain；Enter mechanical centrifugal module 36 afterwards；

4), magnetization aggregated particles is centrifugal in mechanical centrifugal module 36；

5), adsorb, by adsorption module 34, the magnetization being gathered in near-wall after mechanical centrifugal module 36 is centrifugal and be polymerized big microgranule；Enter demagnetization module 35 afterwards；

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

7), the fluid of U-shaped separation of particles module 3 near-wall is back to fuel tank after entering oil returning tube 7 by oil returning tube oil inlet pipe 22, and the fluid of the pipeline center containing the little particle diameter microgranule of trace then enters inner core 15 by inner core oil inlet pipe 12 and carries out high-precision filtration；

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

9), 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, and any amendment of making within all spirit in this creation and principle, equivalent replacement, improvement etc., should be included within the protection domain of this creation.

Claims (10)

1. one kind adopts wave filter, magnetization, absorption and centrifugal oil strain method, it is characterised in that: it adopts a kind of oil-filtering apparatus, and this device includes base plate, wave filter, U-shaped separation of particles module, oil returning tube, inner core, helical flow path, filter element, outer barrel and end cap；Wherein, described wave filter, U-shaped separation of particles module, oil returning tube, outer barrel are sequentially placed on base plate；Described wave filter includes input pipe, shell, outlet tube, elastic thin-wall, plug-in type H mode filter and plug-in type cascaded H mode filter；Wherein, described input pipe is connected to one end of shell, and it extends in shell, and itself and a hydraulic oil inlet are docked；Described outlet tube is connected to the other end of shell, and it extends in shell, and itself and U-shaped separation of particles module are docked；Described elastic thin-wall is installed in shell along the radial direction of shell；Described input pipe, outlet tube and elastic thin-wall are collectively forming a two-tube slip-on filter；Resonance series cavity volume I, resonance series cavity volume II and parallel resonance cavity volume is formed between described elastic thin-wall and shell；Separated by an elastic baffle between described resonance series cavity volume I and resonance series cavity volume II；Described elastic thin-wall axially uniformly have some conical damping holes；Described elastic baffle is provided with taper near input tube side and inserts pipe, and pipe connection resonance series cavity volume I and resonance series cavity volume II is inserted in described taper；Described plug-in type H mode filter is positioned at parallel resonance cavity volume, and it is connected with conical damping hole；Described plug-in type cascaded H mode filter is positioned at resonance series cavity volume I and resonance series cavity volume II, and it is also connected with conical damping hole；Described plug-in type H mode filter and plug-in type cascaded H mode filter are axially symmetrical set, and form plug-in type connection in series-parallel H mode filter；Described U-shaped separation of particles module includes a U-tube, and U-tube is sequentially installed with temperature control module, magnetized module, mechanical centrifugal module, adsorption module and demagnetization module；Connecting above through an oil returning tube oil inlet pipe of described U-shaped separation of particles module and oil returning tube；Described inner core is placed in outer barrel, and it is installed on end cap by a top board and some bolts；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, its diameter less than oil returning tube oil inlet pipe diameter, and and oil returning tube oil inlet pipe be coaxially disposed；Described filter element is arranged on the inwall of inner core, and its precision is 1-5 micron；The bottom of said tub is provided with a hydraulic oil oil-out；

It comprises the steps:

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

2), backflow force feed enters the temperature control module of U-shaped separation of particles module, regulates oil temperature to best magnetization temperature 40-50 DEG C by temperature control module, enters magnetized module afterwards；

3), make the metallic particles in fluid be magnetized in magnetic field by magnetizing assembly, and make micron-sized metallic particles aggregate into bulky grain；Enter mechanical centrifugal module afterwards；

4), magnetization aggregated particles is centrifugal in mechanical centrifugal module；

5) after mechanical centrifugal module is centrifugal, the magnetization big microgranule of polymerization of near-wall, it is gathered in by adsorption module absorption；Enter demagnetization module afterwards；

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

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

8), the fluid carrying little particle diameter microgranule flows into the helical flow path of inner core in the way of tangential influent stream, and fluid is close to filter core flow under the influence of centrifugal force, and carries out high-precision filtration；

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

2. adopt wave filter, magnetization, absorption and centrifugal oil strain method as claimed in claim 1, it is characterised in that: the axis of described input pipe and outlet tube is not on the same axis；The described wider place of conical damping hole opening is positioned at resonance series cavity volume I and parallel resonance cavity volume, and its taper angle is 10 °；Described taper is inserted the wider place of tube opening and is positioned at resonance series cavity volume II, and its taper angle is 10 °；The inner side of described elastic thin-wall is provided with colloid damping layer；The internal layer of described colloid damping layer and outer layer respectively outer layer elastic thin-wall and internal layer elastic thin-wall, connected by some pillars are fixing between outer layer elastic thin-wall and internal layer elastic thin-wall；Being filled with the pure water adding antifreezing agent in interlayer between described outer layer elastic thin-wall and internal layer elastic thin-wall, pure water inner suspension has Bio-sil；Described colloid damping layer is connected with shell near one end of outlet tube；Described colloid damping layer is provided with a piston near one end of outlet tube.

3. adopt wave filter, magnetization, absorption and centrifugal oil strain method as claimed in claim 1, it is characterised in that: described temperature control module includes heater, cooler and temperature sensor；Described heater adopts the lubricating oil heater of the Chongqing gold letter with 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 adopts platinum resistance temperature sensor.

4. adopt wave filter, magnetization, absorption and centrifugal oil strain method as claimed in claim 1, 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 pipeline；Described flange welding is at the two ends of aluminum matter pipeline；Each magnetizing current output module is connected to a winding.

5. adopt wave filter, magnetization, absorption and centrifugal oil strain method as claimed in claim 1, it is characterised in that: described mechanical centrifugal module adopts the centrifugal module of eddy flow；The centrifugal module of described eddy flow includes eddy flow tube wall, the first flow deflector, the second flow deflector, motor and flow transducer；Wherein, described first flow deflector is provided with 3, and these 3 first flow deflectors are uniformly distributed along tube wall inner periphery every 120 °, and its laying angle is set to 18 °；Described second flow deflector and the first flow deflector structure are identical, after it is arranged on the first flow deflector, and and the first flow deflector stagger 60 ° and be connected in tube wall, its laying angle is set to 36 DEG C；The long limit of described first flow deflector is connected with tube wall, and minor face extends along the axis of tube wall；Its leading edge frustrates into obtuse, and trailing edge is processed into wing, and it is highly 0.4 times of tube wall diameter, and length is 1.8 times of tube wall diameter；Described motor connects and drives the first flow deflector and the second flow deflector, to regulate laying angle；Described flow transducer is arranged on the central authorities in tube wall.

6. adopt wave filter, magnetization, absorption and centrifugal oil strain method as claimed in claim 1, it is characterized in that: described adsorption module specifically adopts the adjacent type absorbing ring of homopolarity, and the adjacent type absorbing ring of this homopolarity includes aluminium ring shape pipeline, forward solenoid, reverse solenoid and irony magnetic conduction cap；Described forward solenoid and reverse solenoid are respectively arranged in aluminium ring shape pipeline, and both are connected with electric current in opposite direction so that forward solenoid and reverse solenoid adjacent produce like pole；Described irony magnetic conduction cap is arranged on the inwall of aluminium ring shape pipeline, and it is positioned at forward solenoid and the intermediate point of reverse solenoid adjacent and forward solenoid and reverse solenoid axis.

7. adopt wave filter, magnetization, absorption and centrifugal oil strain method as claimed in claim 1, it is characterized in that: described adsorption module specifically adopts the adjacent type absorbing ring of homopolarity of charged hammer, the adjacent type absorbing ring of homopolarity of this charged hammer includes aluminium ring shape pipeline, forward solenoid, reverse solenoid, irony magnetic conduction cap, dividing plate, electric shock hammer and electric magnet；Described forward solenoid and reverse solenoid are respectively arranged in aluminium ring shape pipeline, and both are connected with electric current in opposite direction so that forward solenoid and reverse solenoid adjacent produce like pole；Described irony magnetic conduction cap is arranged on the inwall of aluminium ring shape pipeline, and it is positioned at forward solenoid and the intermediate point of reverse solenoid adjacent and forward solenoid and reverse solenoid axis；Described dividing plate is between forward solenoid and reverse solenoid；Described electric shock hammer and electric magnet are between dividing plate；Described electric magnet connects and can promote electric shock hammer, makes electric shock hammer knock aluminium ring shape inner-walls of duct.

8. adopt wave filter, magnetization, absorption and centrifugal oil strain method as claimed in claim 1, it is characterised in that: the bottom of described oil returning tube is provided with an overflow valve, is provided with an automatically controlled set screw bottom this overflow valve；Described overflow valve is provided with an oil drain out, and this oil drain out is connected to a fuel tank by pipeline.

9. adopt wave filter, magnetization, absorption and centrifugal oil strain method as claimed in claim 1, it is characterised in that: the bottom of described inner core is rounding mesa-shaped, and it is connected by an inner core oil exit pipe and oil returning tube, and inner core oil exit pipe is provided with an automatically controlled check-valves.

10. adopt wave filter, magnetization, absorption and centrifugal oil strain method as claimed in claim 1, it is characterised in that: the center upright of described inner core is provided with a hollow cylinder, hollow cylinder be arranged over pressure difference indicator, this pressure difference indicator is installed on end cap；Described inner core oil inlet pipe and the tangent connection of helical flow path.