CN105840593A - Filter method for filtering, magnetization, magnetic field rotation and centrifugation by full-band variable structure - Google Patents

Abstract

The invention relates to a filter method for filtering, magnetization, magnetic field rotation and centrifugation by a full-band variable structure. The pressure/flow pulsation of hydraulic oil is attenuated through a filter; the filter adopts a full-band variable structure filter; the separation of solid particles is realized through a U-shaped particle separation module; the solid particles in oil move towards a pipe wall, enter an oil return cylinder through an oil inlet pipe of the oil return cylinder, and flow back to an oil tank; oil containing a trace amount of small-particle-size particles in the center of a pipe enters an inner cylinder through an oil inlet pipe of the inner cylinder for high-precision filtration, so that the service life of a filter element is prolonged; the oil entering the oil inlet pipe of the inner cylinder flows into a spiral flow channel of the inner cylinder in a tangential inflow manner; a wall of the inner cylinder is provided with the filter element; filtrate flows by clinging to the filter element under the effect of centrifugal force, and quickly flows parallel to the surface of the filter element; the filtered hydraulic oil flows to an outer cylinder in a direction perpendicular to the surface of the filter element; and polluted particles deposited at the bottom of the inner cylinder can be timely discharged to the oil return cylinder through an electronically controlled check valve, so that the service life of the filter element is prolonged.

Description

With the filtering of full frequency band structure changes, magnetization, rotating excitation field and centrifugal filter method

[technical field]

The present invention relates to a kind of hydraulic oil filtering method, be specifically related to the filter of one full frequency band structure changes Ripple, magnetization, rotating excitation field and centrifugal 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 due to oil Liquid pollution causes.Solid particle is then the pollutant the most universal in oil contamination, damaging effect is maximum. The hydraulic system fault caused by solid grain contamination accounts for the 70% of gross contamination fault.In hydraulic system In particulate pollutant in fluid, metal filings accounting is between 20%～70%.Adopt an effective measure Filter the solid grain contamination in fluid, be the key of Pollution Control in Hydraulic System, be also system peace The Reliable guarantee of row for the national games.

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

But, the high pressure filter that existing hydraulic system uses has the disadvantage that (1) all kinds of liquid The cleannes of fluid are required different by pressure element, and the particle size of the solia particle in fluid is the most each Differ, need for this multiple dissimilar wave filters to be installed, thus at the diverse location of hydraulic system Bring cost and the problem installing complexity；(2) filter in hydraulic system mainly uses filter cake Filter type, during filtration, filtrate is perpendicular to filter element surface flowing, and trapped solia particle is formed Filter cake progressive additive, the rate of filtration is gradually reduced the most therewith until filtrate stops flowing out, and reduces The service life of filtering element.

Therefore, for solving above-mentioned technical problem, becoming with full frequency band of a kind of innovation of necessary offer is tied Structure filtering, magnetization, rotating excitation field and centrifugal filter method, of the prior art described scarce to overcome Fall into.

[summary of the invention]

For solving above-mentioned technical problem, it is an object of the invention to provide a kind of strainability good, adapt to Property and integration high, service life length with the filtering of full frequency band structure changes, magnetization, rotating excitation field and from The filter method of the heart.

For achieving the above object, the technical scheme that the present invention takes is: use full frequency band structure changes to filter, Magnetization, rotating excitation field and centrifugal filter method, it uses a kind of filter, and this filter includes the end Plate, wave filter, U-shaped separation of particles module, oil returning tube, inner core, helical flow path, filter core, outer barrel And end cap；Wherein, described wave filter, U-shaped separation of particles module, oil returning tube, outer barrel are put successively On base plate；Described wave filter includes input pipe, shell, efferent duct, S type elastic thin-wall, H type Wave filter and cascaded H mode filter；Wherein, described input pipe is connected to one end of shell, itself and One hydraulic oil inlet docking；Described efferent duct is connected to the other end of shell, itself and U-shaped separation of particles Module is docked；Described S type elastic thin-wall is installed in shell along the radial direction of shell, is formed and expand in it Chamber and contraction chamber；Described input pipe, efferent duct and S type elastic thin-wall are collectively forming a S type cavity volume filter Ripple device；Some taper structure changes damping holes are uniformly had in the axial direction of described S type elastic thin-wall；Described Taper structure changes damping hole is made up of cone shaped elastic damping hole pipe and slot apertures；Described S type elastic thin-wall and Resonance series cavity volume I and parallel resonance cavity volume is formed between shell；Described resonance series cavity volume I's Outside sets a resonance series cavity volume II, logical between described resonance series cavity volume I and resonance series cavity volume II Cross a taper and insert pipe connection；Described H mode filter is positioned at parallel resonance cavity volume, and itself and taper become Structural damping hole is connected；Described cascaded H mode filter is positioned at resonance series cavity volume I and resonance series In cavity volume II, it is also connected with taper structure changes damping hole；Described H mode filter and cascaded H Mode filter is axially symmetrical set, and forms connection in series-parallel H mode filter；Described U-shaped separation of particles Module includes a U-tube, and U-tube is sequentially installed with temperature control module, magnetized module, mechanical centrifugal Module, the first adsorption module, rotating excitation field are centrifuged module, the second adsorption module and demagnetization module； The top of described U-shaped separation of particles module and oil returning tube is connected by an oil returning tube oil inlet pipe；In described Cylinder is placed in outer barrel, if it is installed on end cap by a top board and bolt stem；Described helical flow path It is contained in inner core, is connected by an inner core oil inlet pipe between itself and U-shaped separation of particles module；Described Inner core oil inlet pipe is positioned at oil returning tube oil inlet pipe, and extends into the central authorities of U-shaped separation of particles 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 core is arranged On the inwall of inner core, its precision is 1-5 micron；It is fuel-displaced that the bottom of said tub is provided with a hydraulic oil Mouthful；

It comprises the steps:

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

2), phegma force feed enters the temperature control module of U-shaped separation of particles module, is adjusted by temperature control module Fuel-economizing temperature, to optimal magnetization temperature 40-50 DEG C, enters magnetized module afterwards；

3), by magnetizing assembly, oil return is magnetized, make micron-sized metallic particles aggregate into big Grain, delivers to the first adsorption module afterwards；

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

5), by the magnetic polymeric particulate in the first adsorption module absorption oil return, rotation is delivered in oil return afterwards Turn magnetic field and be centrifuged module；

6), rotating excitation field is centrifuged module and utilizes rotating excitation field to separate unadsorbed magnetic microparticles, returns afterwards The second adsorption module delivered to by oil；

7), the magnetic polymeric particulate in the second adsorption module second adsorption oil return；

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

9), the fluid of the most U-shaped separation of particles module near-wall is entered back by oil returning tube oil inlet pipe Being back to fuel tank after oil cylinder, the fluid of the pipeline center containing trace small particle particulate is then entered by inner core Oil pipe enters inner core and carries out high-precision filtration；

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

11), the fluid after high-precision filtration enters urceolus, and by the hydraulic oil oil-out bottom urceolus Discharge.

The present invention enters with the filtering of full frequency band structure changes, magnetization, rotating excitation field and centrifugal filter method One step is: the axis of described input pipe and efferent duct is the most on the same axis；Described taper structure changes hinders The wider place of opening, Buddhist nun hole is positioned at resonance series cavity volume I and parallel resonance cavity volume, and its taper angle is 10 °； The Young's modulus of described taper structure changes damping hole cone shaped elastic damping hole pipe is than the Young of elastic thin-wall Modulus wants big, can be with change in fluid pressure stretching or compression；The Young's modulus of slot apertures hinders than cone shaped elastic The Young's modulus of Buddhist nun hole pipe wants big, can be with fluid opened by pressure or closedown；Tube opening is inserted in described taper Wider place is positioned at resonance series cavity volume II, and its taper angle is 10 °.

The present invention enters with the filtering of full frequency band structure changes, magnetization, rotating excitation field and centrifugal filter method One step is: described temperature control module includes heater, cooler and temperature sensor；Described heater is adopted Lubricating oil heater with the Chongqing gold letter of band temperature detection；Described cooler selects surface evaporative empty Cooler, the finned tube of cooler selects KLM type finned tube；Temperature sensor uses platinum resistance temperature to pass Sensor.

The present invention enters with the filtering of full frequency band structure changes, magnetization, rotating excitation field and centrifugal filter method One step is: if described magnetized module include aluminium matter pipeline, some windings, iron shell, flange and Dry magnetizing current output module；Wherein, described some windings rotating around outside aluminium matter pipeline, each winding It is made up of positive winding and inverse winding；Described iron shell is coated on aluminium matter pipeline；Described flange welding Two ends at aluminium matter pipeline；Each magnetizing current output module is connected to a winding.

The present invention enters with the filtering of full frequency band structure changes, magnetization, rotating excitation field and centrifugal filter method One step is: described mechanical centrifugal module uses eddy flow to be centrifuged module；Described eddy flow is centrifuged module and includes rotation Flow tube wall, the first flow deflector, the second flow deflector, stepper motor and flow sensor；Wherein, institute Stating the first flow deflector and be provided with 3, these 3 first flow deflectors uniformly divide along tube wall inner periphery every 120 ° Cloth, its laying angle is set to 18 °；Described second flow deflector and the first flow deflector structure are identical, and it is arranged After the first flow deflector, and and the first flow deflector stagger 60 ° and be connected in tube wall, its laying angle is set to 36℃；The long limit of described first flow deflector is connected with tube wall, and minor face extends along the axis of tube wall；Before it Edge frustrates into obtuse, and trailing edge is processed into wing, and its height is 0.4 times of tube wall diameter, a length of tube wall 1.8 times of diameter；Described stepper motor connects and drives the first flow deflector and the second flow deflector, to adjust Joint laying angle；Described flow sensor is arranged on the central authorities in tube wall.

The present invention enters with the filtering of full frequency band structure changes, magnetization, rotating excitation field and centrifugal filter method One step is: described first adsorption module and the second adsorption module all use homopolarity adjacent type absorbing ring, should Homopolarity adjacent type absorbing ring includes aluminium ring shape pipeline, forward solenoid, reverse solenoid and irony Magnetic conduction cap；Described forward solenoid and reverse solenoid are respectively arranged in aluminium ring shape pipeline, both It is connected with electric current in opposite direction so that forward solenoid and reverse solenoid adjacent produce same sex magnetic Pole；Described irony magnetic conduction cap is arranged on the inwall of aluminium ring shape pipeline, its be positioned at forward solenoid and Reverse solenoid adjacent and forward solenoid and the intermediate point of reverse solenoid axis.

The present invention enters with the filtering of full frequency band structure changes, magnetization, rotating excitation field and centrifugal filter method One step is: described first adsorption module and the second adsorption module all use the adjacent type of homopolarity of charged hammer Absorbing ring, the homopolarity adjacent type absorbing ring of this charged hammer include aluminium ring shape pipeline, forward solenoid, Reverse solenoid, irony magnetic conduction cap, dividing plate, electric shock hammer and electromagnet；Described forward solenoid and Reverse solenoid is respectively arranged in aluminium ring shape pipeline, and both are connected with electric current in opposite direction so that Forward solenoid and reverse solenoid adjacent produce like pole；Described irony magnetic conduction cap is arranged in aluminium On the inwall of matter circulating line, it is positioned at forward solenoid and reverse solenoid adjacent and forward Solenoid and the intermediate point of reverse solenoid axis；Described dividing plate is positioned at forward solenoid and reverse helical Between pipe；Described electric shock hammer and electromagnet are between dividing plate；Described electromagnet connects and can promote electricity Hammer, makes electric shock hammer tap aluminium ring shape inner-walls of duct.

The present invention enters with the filtering of full frequency band structure changes, magnetization, rotating excitation field and centrifugal filter method One step is: described rotating excitation field be centrifuged module include aluminium matter pipeline, iron shell, three-phase symmetric winding, Flange and three-phase symmetrical current module；Described three-phase symmetric winding is wound on outside aluminium matter pipeline；Described iron Matter shell is coated on aluminium matter pipeline；Described flange welding is at the two ends of aluminium matter pipeline；Described three relative Current module is claimed to connect described three-phase symmetric winding.

The present invention enters with the filtering of full frequency band structure changes, magnetization, rotating excitation field and centrifugal filter method One step is: the bottom of described oil returning tube is provided with an overflow valve, is provided with an automatically controlled regulation bottom this overflow valve Screw；Described overflow valve is provided with an oil drain out, and this oil drain out is connected to a fuel tank by pipeline.

The present invention uses the filtering of full frequency band structure changes, magnetization, rotating excitation field and centrifugal filter method also For: 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, interior Cylinder oil exit pipe is provided with an automatically controlled check-valves；The center upright of described inner core is provided with a hollow cylinder, empty Heart cylinder be arranged over pressure difference indicator, this pressure difference indicator is installed on end cap；Described inner core enters Oil 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 core not occur Vibration, to improve strainability；Hydraulic oil realizes dividing of solia particle in U-shaped separation of particles module From, make the solia particle in fluid to vessel wall motion, at U-shaped separation of particles module outlet, rich in The fluid of the near-wall of solia particle is back to fuel tank after entering oil returning tube by oil returning tube oil inlet pipe, The only fluid of the pipeline center containing trace small particle particulate is then entered by inner core oil inlet pipe entrance inner core Row high-precision filtration, improves the service life of filter core, reduces filtering cost and complexity；Enter The fluid of inner core oil inlet pipe flows into the helical flow path of inner core in the way of tangential influent stream, and inner tube wall is filter Core, then filtrate is close to filter core flow under the influence of centrifugal force, and the surface that filtrate is parallel to filter core is quick Flowing, the hydraulic oil after filtration is then perpendicular to cartridge surface direction and flows out to urceolus, and this cross flows through The particulate of cartridge surface is implemented to sweep stream effect by filter mode, it is suppressed that the increase of filter cake thickness, is deposited on Pollution particle bottom inner core regularly can be discharged to oil returning tube by automatically controlled check-valves, thus improves filter core Service life.

2., by controlling temperature and the magnetic field intensity of hydraulic oil, make the force-magnetized gathering of the particle in fluid Become bulky grain, and promote colloidal particles decomposition to melt；Efficient absorption is formed by adsorption module；Utilize Molecule in fluid " is separated " and gathers near-wall by rotating excitation field, catches with adsorbent equipment Obtain molecule；Avoid endangering Hydraulic Elements to residual particles demagnetization by degaussing gear, so that oily In liquid, solia particle is gathered into bulky grain and moves to near-wall.

3. the generation of non-uniform magnetic-field that magnetization needs, need multipair forward and reverse coil to and by different greatly Little electric current, and current values can numeral setting online.

[accompanying drawing explanation]

Fig. 1 is use full frequency band structure changes filtering, magnetization, rotating excitation field and the centrifugal filtration of the present invention The structural representation of case.

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 S type cavity volume wave filter.

Fig. 9 is the cross sectional representation of S type 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 be first adsorption module (the second adsorption module) of Figure 11 be homopolarity adjacent type absorbing ring Structural representation.

Figure 16 is the homopolarity that the first adsorption module (the second adsorption module) is charged hammer in Figure 11 The structural representation of adjacent type absorbing ring.

Figure 17 is the structural representation that the rotating excitation field in Figure 11 is centrifuged module.

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

Figure 19 is the radial direction schematic diagram of the mechanical centrifugal module of Figure 11.

[detailed description of the invention]

Referring to shown in Figure of description 1 to accompanying drawing 19, the present invention is one full frequency band structure changes Filtering, magnetization, rotating excitation field and centrifugal Rose Box, it is by base plate 6, wave filter 8, U-shaped particulate Separation module 3, oil returning tube 7, inner core 15, helical flow path 17, filter core 18, outer barrel 19 and end Several parts compositions such as lid 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 for hydraulic oil is inputted, and can decay in hydraulic system high, medium and low The fluctuation pressure of frequency range, and suppression flowed fluctuation.Described wave filter 8 by input pipe 81, shell 88, Efferent duct 89, S type elastic thin-wall 87, H mode filter 812 and cascaded H mode filter 813 Form etc. several parts.

Wherein, described input pipe 81 is connected to one end of shell 89, and itself and a hydraulic oil inlet 1 are right Connect；Described efferent duct 811 is connected to the other end of shell 89, itself and U-shaped separation of particles module 3 Docking.Described S type elastic thin-wall 87 is installed in shell 88 along the radial direction of shell, is formed swollen in it Swollen chamber 71 and contraction chamber 72.The axis of described input pipe 81 and efferent duct 89 the most on the same axis, So can improve the filter effect of more than 10%.

Described input pipe 81, efferent duct 89 and S type elastic thin-wall 87 are collectively forming a S type cavity volume filter Ripple device, thus hydraulic system high frequency pressure pulsations of decaying.The filtering obtained after processing by lumped-parameter method Device transmission coefficient is:

$\mathrm{\γ}=\frac{1}{1+{(\frac{2\mathrm{\π}f}{Z}\·\frac{\frac{2}{3}{k}_1{D}^3+k_2{d}^{2}L}{{d_I}^2\·a})}^2}$

Velocity of sound L contraction chamber length D expansion chamber diameter Z characteristic resistance in a medium Anti-

γ transmission coefficient f pressure oscillation frequency d_IInput pipe diameter d contraction chamber Diameter

k₁Expansion chamber coefficient k₂Contraction chamber coefficient

From above formula, S type cavity volume wave filter is similar with the electric capacity effect in circuit.Different frequency When pressure pulse 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 that the pressure pulse wave of high frequency is decayed the most severe when device after filtering, thus Serve the effect eliminating high frequency pressure pulsations.Meanwhile, in the S type holding cavity structure of the present invention, expand Transitions smooth between chamber and contraction chamber, contributes to reducing the system pressure damage that cavity diameter sudden change brings Lose.The input pipe of wave filter and efferent duct the most on the same axis, can improve the filtering of more than 10% Effect.

The design principle of described S type cavity volume wave filter is as follows: when the flow of change is entered by input pipe During the expansion chamber of S type cavity volume, liquid flow exceedes average discharge, and the expansion chamber of expansion can absorb unnecessary liquid Stream, and when less than average discharge, release liquid flow, thus absorption pressure pulsation energy.Multiple expansion chamber Combination with contraction chamber then improves the fluctuation pressure absorbability of wave filter, namely filtering performance.Swollen Use curved surface to smoothly transit between swollen chamber and contraction chamber, then avoid the edge brought by fluid boundary sudden change Stroke pressure loss and heating.

Described S type elastic thin-wall 87 weakens hydraulic system medium-high frequency pressure by being forced to mechanical oscillation Pulsation.The S type elastic thin-wall intrinsic 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 S type elastic thin-walled structures coefficient h S type elastic thin-wall thickness R S type bullet Property thin-walled radius

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

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

Substitute into actual parameter, above formula is carried out simulation analysis it is found that the consolidating of S type elastic thin-wall 87 There is frequency generally high than the intrinsic frequency of H mode filter, and its attenuation band also ratio H mode filter Wide.In relatively wide frequency band range, S type elastic thin-wall has good decay to pressure fluctuation Effect.Meanwhile, the S type elastic thin-wall radius in the filter construction of the present invention is bigger and relatively thin, its Intrinsic frequency, closer to Mid Frequency, can realize effectively declining to the medium-high frequency pressure fluctuation in hydraulic system Subtract.

The design principle of described S type elastic thin-wall 87 is as follows: when producing intermediate frequency pressure fluctuation in pipeline, S type cavity volume is more weak to the damping capacity of pressure oscillation, flows into the periodically pulsing of wave filter S type cavity volume Pressure continuous action is on the inside and outside wall of S type elastic thin-wall 87, owing to there being pillar solid between inside and outside wall Fixed connection, inside and outside elastic thin-wall does periodic vibration by the frequency of fluctuation pressure simultaneously, this forced vibration Consume the pressure fluctuation energy of fluid, thus realize the filtering of Mid Frequency pressure.From the principle of virtual work, Potential energy when elastic thin-wall consumes the ability of fluid pulsation pressure energy and its forced vibration and kinetic energy it With directly related, in order to improve Mid Frequency filtering performance, the radial design of elastic thin-wall is for much larger than pipe Road radius, and the thickness of thin-walled is less, representative value is less than 0.1mm.

Further, resonance series cavity volume I84 is formed between described S type elastic thin-wall 87 and shell 88 And parallel resonance cavity volume 85.The outside of described resonance series cavity volume I84 sets a resonance series cavity volume II83, inserts pipe by a taper between described resonance series cavity volume I84 and resonance series cavity volume II83 82 connections, the described taper insertion wider place of pipe 82 opening is positioned at resonance series cavity volume II83, its cone Degree angle is 10 °.The resistance of some taper structure changes is uniformly had in the axial direction of described S type elastic thin-wall 87 Buddhist nun hole 86.

Described H mode filter 812 is positioned at parallel resonance cavity volume 85, and itself and taper structure changes damp Hole 86 is connected.The wider place of described taper structure changes damping hole 86 opening is positioned at resonance series cavity volume I84 With in parallel resonance cavity volume 85, its taper angle is 10 °.The filter obtained after processing by lumped-parameter method Ripple device natural angular frequency 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 In, it is also connected with taper structure changes damping hole 86.After processing by lumped-parameter method, cascaded H Two natural angular frequencies of 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 Connection in series-parallel H mode filter, for broadening frequency filtering scope and make overall structure more compact.The present invention Circumferentially interface distributions multiple connection in series-parallel H mode filters (only depicting 2 in figure), each other it Between separate with dividing plate 820, the resonance bands of these multiple wave filters is different, can after combining Cover whole medium and low frequency filtering frequency range, it is achieved the entire spectrum filtering of medium and low frequency section comprehensively.

All can be found by Fig. 6 H mode filter and cascaded H mode filter frequency characteristic and formula, series connection H mode filter has 2 natural angular frequencies, and at crest, filter effect is preferable, then base at trough Originally there is no filter effect；H mode filter has 1 natural angular frequency, equally filter effect at crest Preferably, at trough, the most substantially do not has filter effect；Select suitable filter parameter, make H type The natural angular frequency of wave filter just falls between 2 natural angular frequencies of cascaded H mode filter, as Shown in Fig. 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 at trough preferably Filter effect.The bank of filters that multiple 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.

Further, described taper structure changes damping hole 86 is by cone shaped elastic damping hole pipe 16 and slot apertures 15 compositions, taper narrow end is opened on elastic thin-wall 7.The wherein poplar of cone shaped elastic damping hole pipe 16 The Young's modulus of family name's modular ratio elastic thin-wall 7 wants big, can be with change in fluid pressure stretching or compression；Seam The Young's modulus in hole 15 is bigger than the Young's modulus of cone shaped elastic damping hole pipe 16, can be with fluid pressure It is turned on and off.Therefore when the fluctuating frequency of pressure falls at high band, c-type cavity volume filter construction plays filter Ripple effect, cone shaped elastic damping hole pipe 16 and slot apertures 15 are all in Figure 10 (a) state；And work as arteries and veins Dynamic frequency falls when Mid Frequency, and filter construction becomes c-type cavity volume filter construction and elastic thin-wall 7 Filter structure concurs, and cone shaped elastic damping hole pipe 16 and slot apertures 15 are all in Figure 10 (a) State；When ripple frequency falls at some specific Frequency, filter construction becomes plug-in type string H mode filter in parallel, c-type cavity volume filter construction and elastic thin-wall filter structure concur, Cone shaped elastic damping hole pipe 16 and slot apertures 15 are all in Figure 10 (b) state, due to plug-in type string also The intrinsic frequency of connection H mode filter is designed to consistent, to fundamental frequency with these particular low frequency ripple frequencies The system that energy is big can play preferable filter effect；When ripple frequency falls beyond some CF Low-frequency range time, cone shaped elastic damping hole pipe 16 and slot apertures 15 are all in Figure 10 (c) state.This The structure changes wave filter design of sample both ensure that the full frequency band full working scope filtering of hydraulic system, reduces again The pressure loss of wave filter under nominal situation, it is ensured that the hydraulic pressure rigidity of system.

The present invention can also the pulsation decay of solid line operating mode self-adaptive pressure.When hydraulic system working conditions change, Both executive component stopped suddenly or ran, and when the opening of valve changes, can cause the spy of pipe-line system Property impedance is undergone mutation, so that former pipeline pressure curve with change in location in time changes the most therewith Become, then the position of pressure peak also changes.Axial length design due to the wave filter of the present invention For pulsing wavelength more than system main pressure, and the cavity volume of the connection in series-parallel H mode filter group of wave filter is long Degree, the length of S type cavity volume wave filter and the length of elastic thin-wall and wave filter axial length are equal, protect Demonstrate,prove pressure peak position to be constantly in the effective range of wave filter；And the filtering of connection in series-parallel H type The taper structure changes damping hole of device is opened on elastic thin-wall, is uniformly distributed in the axial direction so that pressure The performance of wave filter is had little to no effect by variations in peak, it is achieved thereby that operating mode adaptive-filtering Function.Suitable in view of three kinds of filter structure axial dimensions and wave filter, this bigger size is also protected Demonstrate,prove hydraulic filter and possess 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 S type cavity volume wave filter by input pipe, and it is unnecessary that the cavity volume of expansion absorbs Liquid flow, completes the filtering of high frequency pressure pulsations；

2), by S type elastic thin-wall 87 forced vibration, the pressure fluctuation energy of fluid is consumed, complete Become the filtering of intermediate frequency pressure fluctuation；

3), by connection in series-parallel H mode filter group, and taper structure changes damping hole, taper insertion pipe Produce resonance with fluid, 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 Connection in series-parallel H mode filter length, S type cavity volume filter length and S type elastic thin-wall 87 length are same Filter length is equal, makes pressure peak position be constantly in the effective range of wave filter, it is achieved The filtering of pressure fluctuation when system condition changes；

5), by stretching of the cone shaped elastic damping hole pipe of taper structure changes damping hole and opening of slot apertures Close, complete pressure fluctuation adaptive-filtering.

Described U-shaped separation of particles module 3 includes a U-tube 31, and U-tube 31 is sequentially installed with Temperature control module 32, magnetized module 33, mechanical centrifugal module the 38, first adsorption module 34, rotary magnetic Centrifugal module the 36, second adsorption module 37 in field and demagnetization module 35.

Described temperature control module 32 main purpose is to provide optimal magnetization temperature for magnetized module 33 40-50 DEG C, the most also having the effect of fluid viscosity reduction concurrently, it includes heater, cooler and TEMP Device.Described heater uses the lubricating oil heater of the Chongqing gold letter of band 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, use light Pipe, fluid resistance is little；Cooler fin type is high wing, and finned tube selects KLM type finned tube, passes Good in thermal property, thermal contact resistance is little, and fin is big with pipe contact area, and laminating closely, firmly, is born Cold and hot sudden turn of events ability is good, and fin root weather-resistant performance is high；The pipe row optimum of air cooler is 8. Described temperature sensor uses 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-homogeneous simultaneously Magnetic field, carries out magnetization and decomposes the colloidal particles in hydraulic oil, and making colloid particulate breakup is smaller particle The particulate of size, pollution abatement.

Described magnetized module 33 is by aluminium matter pipeline 331, some windings 332, iron shell 333, method Orchid 334 and some magnetizing current output modules 335 form.Wherein, described aluminium matter pipeline 331 makes Fluid flows there through and by magnetization treatment, and the magnetic conductivity of aluminium is the lowest, can make in pipeline 331 Obtain higher magnetic field intensity.

Described some windings 332 are rotating around outside aluminium matter pipeline 331, by a diameter of about 1.0mm Copper wire coating insulated paint is made.Each winding 332 is all separate setting, respectively by corresponding magnetic Galvanic current output module 335 controls, and wherein electric current needs different according to system.Due to often enclose around Organizing 332 separate, the electric current loop that its exit can cause this coil to form is not real " justifying ", But having individual breach, this can cause the radial distribution of aluminium matter pipeline 331 internal magnetic field uneven, thus shadow Ring magnetic efficiency.For solving this problem, the often circle winding 332 of this creation is all by positive winding 336 and inverse Winding 337 forms in order to produce the magnetic field in same polarity direction and make up what breach caused simultaneously Magnetic field is unbalanced.Size of current in positive winding and inverse winding is equal.In aluminium matter pipeline 331 axis side Upwards it is arranged with multipair forward and reverse winding, by different electric currents, in order to form the non-homogeneous of aforementioned claim Magnetic field.

Described iron shell 333 is coated on aluminium matter pipeline 331, and the material of irony can mask big portion The magnetic flux divided.Described flange 334 is welded on the two ends of aluminium 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 The feature of Shi Xiugai resistance, it is achieved the real-time control of non-uniform magnetic-field.Described magnetizing current output module The circuit theory diagrams of 335 can be found in accompanying drawing 5, and its digital potentiometer used is AD5206, has 6 Passage defeated.Amplifier AD8601 and metal-oxide-semiconductor 2N7002 achieve high-precision electricity by negative-feedback Pressure follows output.Constant High-current output have employed the high voltage of Texas Instrument (TI), the fortune of big electric current Put OPA 549.

Described mechanical centrifugal module 38 makes the magnetization aggregated particles in fluid be thrown toward under the action of the centrifugal Tube wall.Described mechanical centrifugal module 38 selects eddy flow to be centrifuged module 38, and this eddy flow is centrifuged module 38 and adopts By the mode of energy loss, its design principle is as follows: arrange the torsion of certain altitude and length in the duct Bent flow deflector, and make blade face tangent line angled with axis, because pipe stream border changes and can make Fluid produces spiral flow in pipes, and this spiral flow can be analyzed to the circumferential flow around pipe axle and axial straight flow Dynamic, the particulate matter carried in fluid produces off-axis alignment heart screw.This eddy flow centrifugal device 38 By eddy flow tube wall the 381, first flow deflector the 382, second flow deflector 383, stepper motor 384 and stream Several parts compositions such as quantity sensor 385.

Wherein, described first flow deflector 382 is provided with 3, and these 3 first flow deflectors 382 are along tube wall 381 inner peripherys are uniformly distributed every 120 °, its laying angle (the first flow deflector 382 and eddy flow tube wall 381 Between angle) be set to 18 °, to ensure optimal tangential flowing.Described second flow deflector 383 and One flow deflector 382 structure is identical, after it is arranged on the first flow deflector 382, and and the first flow deflector 382 Staggering 60 ° and be connected in tube wall 381, its laying angle is set to 36 DEG C, is used for reducing resistance and strengthening week Intensity to flowing.It addition, the 3rd or more water conservancy diversion can be arranged the most again according to actual separation effect Sheet, laying angle gradually increases.Described stepper motor 384 connects and drives the first flow deflector 382 and Two flow deflectors 383, to regulate laying angle, thus can obtain more preferable centrifugal effect, know and make water conservancy diversion Sheet 382,383 adapts to different operating modes.Described flow sensor 385 is arranged in tube wall 381 Central authorities, by the numerical analysis cyclonic separation effect of reading flow quantity sensor 385, and control step accordingly Entering motor 384, stepper motor 384 regulates the laying angle of each flow deflector 382,383, to obtain more Separating effect.

Further, the long limit of described first flow deflector 382 is connected with tube wall 381, minor face 383 edge The axis of tube wall 381 extends；For reducing resistance, its leading edge frustrates into obtuse；For avoiding streaming, trailing edge It is processed into wing；Its height is 0.4 times of tube wall 381 diameter, makes the spiral flow of formation have bigger Intensity；1.8 times of a length of tube wall 381 diameter, to ensure the bigger sphere of action to fluid.

Described first adsorption module 34 is for adsorbing the magnetic polymeric after mechanical centrifugal module 38 is centrifugal Big particulate, it can use homopolarity adjacent type absorbing ring, and this homopolarity adjacent type absorbing ring is by aluminium ring shape pipe The parts groups such as road 341, forward solenoid 342, reverse solenoid 343 and irony magnetic conduction cap 344 Become.Wherein, described forward solenoid 342 and reverse solenoid 343 are respectively arranged in aluminium ring shape pipe Road 341, both are connected with electric current in opposite direction so that forward solenoid 342 and reverse solenoid 343 Adjacent produces like pole.Described irony magnetic conduction cap 344 is arranged in the interior of aluminium ring shape pipeline 341 On wall, it is positioned at forward solenoid 342 and reverse solenoid 343 adjacent and forward solenoid 342 and the intermediate point of reverse solenoid 343 axis.

The design principle of described homopolarity adjacent type absorbing ring is as follows: energising forward solenoid 342, reversely Solenoid 343, adjacent forward solenoid 342, reverse solenoid 343 are connected with electricity in opposite direction Stream so that forward solenoid 342, reverse solenoid 343 adjacent produce like pole；Meanwhile, Aluminium ring shape pipeline 341 can improve magnetic circuit, strengthens the magnetic field intensity at inner-walls of duct, strengthens irony The magnetic conduction cap 344 capture adsorption capacity to particle.Each forward solenoid 342, reverse solenoid 343 Electric current can be different with concentration and change, to obtain optimal adsorption performance according to the particle size of particle.

Further, described first adsorption module 34 may be used without the homopolarity adjacent type suction of charged hammer Follower ring, the homopolarity adjacent type absorbing ring of this charged hammer is by aluminium ring shape pipeline 341, forward solenoid 342, reverse solenoid 343, irony magnetic conduction cap 344, dividing plate 345, electric shock hammer 346 and electromagnetism Iron 347 parts such as grade form.Wherein, described forward solenoid 342 and reverse solenoid 343 cloth respectively Being placed in aluminium ring shape pipeline 341, both are connected with electric current in opposite direction so that forward solenoid 342 Like pole is produced with reverse solenoid 343 adjacent.Described irony magnetic conduction cap 344 is arranged in aluminium matter On the inwall of circulating line 341, its be positioned at forward solenoid 342 and reverse solenoid 343 adjacent, And forward solenoid 342 and the intermediate point of reverse solenoid 343 axis.Described electric shock hammer 346 Hes Electromagnet 347 is between dividing plate 345.Described electromagnet 347 connects and can promote electric shock hammer 346, Make electric shock hammer 346 percussion aluminium ring shape pipeline 342 inwall.

The design principle of the homopolarity adjacent type absorbing ring of described charged hammer is as follows: energising forward solenoid 342, reverse solenoid 343, adjacent forward solenoid 342, reverse solenoid 343 are connected with direction Contrary electric current so that forward solenoid 342, reverse solenoid 343 adjacent produce like pole； Meanwhile, aluminium ring shape pipeline 341 can improve magnetic circuit, strengthens the magnetic field intensity at inner-walls of duct, increases The strong irony magnetic conduction cap 344 capture adsorption capacity to particle.Each forward solenoid 342, reverse helical Pipe 343 electric current can be different with concentration and change, to obtain best adsorption according to the particle size of particle Energy.And by the setting of electric shock hammer 346, prevent particle bulk deposition at irony magnetic conduction cap 344, Affect adsorption effect.Now, controlled in electric shock hammer 346 percussion pipeline 341 by electromagnet 347 Wall so that adsorbed particle scatter to both sides.Meanwhile, when cleaning pipeline 341, electric shock hammer The percussion of 346 can also improve cleaning performance.

Described first adsorption module 34 is designed to U-shaped, when fluid enters U-shaped absorption pipeline, Grain gravity, centrifugal force effect under, to side, tube wall moves, plus magnetic field force effect, radially Translational speed is accelerated, and the efficiency of granular absorption is improved；Leave U-shaped absorption pipeline at fluid to rise Time, gravity and magnetic field force make a concerted effort so that particle diagonally under direction motion, extend numerical density Time, improve the efficiency of granular absorption.

Described rotating excitation field is centrifuged module 36 and utilizes that rotating excitation field is centrifugal is not inhaled by the first adsorbent equipment 34 Attached small magnetization particle, its by aluminium matter pipeline 361, iron shell 362, three-phase symmetric winding 363, Flange 364 and three-phase symmetrical current module 365 form.Described three-phase symmetric winding 363 is wound on aluminium Outside matter pipeline 361.Described iron shell 362 is coated on aluminium matter pipeline 361.Described flange 364 It is welded on the two ends of aluminium matter pipeline 361.Described three-phase symmetrical current module 365 connects described three relative Claim winding 363.

The operation principle that described rotating excitation field is centrifuged module 36 is as follows: small magnetization not to be adsorbed Grain enters rotating excitation field and is centrifuged module 36, and three-phase symmetrical current module 365 makes three-phase symmetric winding 363 In flow through three-phase symmetrical electric current, this electric current produces rotating excitation field, magnetized particles in aluminium matter pipeline 361 Acted on by magnetic field force under rotating excitation field effect, and the most spirally advanced, Simultaneously to vessel wall motion.Therefore, regulation magnetic field intensity can make the particle in fluid " divide from fluid From " out, it being gathered in aluminium 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, function and effect Mechanism is the most identical, and it can adsorb rotated magnetic field further and be centrifuged the particle that module 36 separates.

Described demagnetization module 35 gives magnetized particles demagnetization, prevents residual magnetism particulate from being entered by oil returning tube Oil pipe enters hydraulic circuit, and sensitive to pollution Hydraulic Elements cause damage.

An oil returning tube oil inlet pipe 22 is passed through in the top of described U-shaped separation of particles module 3 and oil returning tube 7 Connect；By U-shaped separation of particles module 3 process after, the fluid of U-tube 31 near-wall rich in Aggregated particles, is back to fuel tank after entering oil returning tube 7 by oil returning tube oil inlet pipe 22.

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

Described inner core 15 is placed in outer barrel 19, if it is installed by a top board 13 and bolt stem 21 On end cap 25.Described helical flow path 17 is contained in inner core 15, itself and U-shaped separation of particles mould Connected by an inner core oil inlet pipe 12 between block 3, specifically, described inner core oil inlet pipe 12 and spiral shell The tangent connection in eddy flow road 17.The fluid of the U-tube 31 pipeline center only small particle particulate Han trace is logical Cross inner core oil inlet pipe 12 to enter inner core 15 and realize high-precision filtration, thus realize solia particle and separate. Further, described inner core oil inlet pipe 12 is positioned at oil returning tube oil inlet pipe 22, and extends into U-shaped micro- The central authorities of grain separation module 3, its diameter is less than oil returning tube oil inlet pipe 22 diameter, and enters with oil returning tube Oil pipe 22 is coaxially disposed.

Further, the bottom of described inner core 15 is rounding mesa-shaped, and it passes through an inner core oil exit pipe 23 Connecting with oil returning tube 7, inner core oil exit pipe 23 is provided with an automatically controlled check-valves 24.Described inner core 15 Center upright is provided with a hollow cylinder 16, hollow cylinder 16 be arranged over pressure difference indicator 14, should Pressure difference indicator 14 is installed on end cap 25.

Described filter core 18 is arranged on the inwall of inner core 15, and its precision is 1-5 micron.

The bottom of said tub 19 is provided with a hydraulic oil oil-out 5, is incited somebody to action by hydraulic oil oil-out 5 The hydraulic oil filtered is discharged.

In the present invention, due to U-shaped separation of particles module 3, solia particle separation of polymeric in fluid is made With, in the fluid in U-shaped separation of particles module 3 exit, the fluid at the center only small particle Han trace Particulate, this part fluid is flowed into inner core 15 from inner core oil inlet pipe 12 and carries out high-precision filtration；And manage Fluid near wall is rich in aggregated particles, and this part fluid enters oil return by oil returning tube oil inlet pipe 22 Cylinder 7, then flow back to fuel tank 11 through the oil drain out 10 of overflow valve 8, thus realize solia particle by particle Footpath shunting filtering.Herein, oil returning tube 7 and overflow valve 8 serve aforesaid macrofiltration, thus save Save filter number, reduce system cost and complexity.The automatically controlled set screw 9 of overflow valve 8 For regulating oil pressure relief, its pressure is adjusted to slightly below pressure at filtering outlet, to ensure inner core 15 filtering traffics.

It addition, traditional filter mainly uses cake filtration mode, during filtration, filtrate is perpendicular to filter Element surface flows, and trapped solia particle forms filter cake progressive additive, and the rate of filtration is the most therewith It is gradually reduced, until filtrate stops flowing out, reduces the service life of filter element.In this present invention In, carry in the filtrate of small particle particulate flows in the way of tangential influent stream from inner core oil inlet pipe 12 The helical flow path 17 of cylinder 15, inner core 15 wall of helical duct 17 side is high-precision filter element 18, filter Liquid is close to filter core 18 surface under the influence of centrifugal force, and filtrate is parallel to the surface of filter core 18 and quickly flows Dynamic, the hydraulic oil after filtration is then perpendicular to filter core 18 surface direction and flows out to urceolus 19, the two stream Dynamic direction is orthogonal staggered, therefore is called cross flow and filters.The quickly flowing of filtrate is to being gathered in The particulate on filter core 18 surface is applied with shearing and sweeps stream effect, thus inhibits the increase of filter cake thickness, Making rate of filtration near constant, filter pressure also will not raise with the passing of time, making of filter core With the life-span thus increase substantially.Along with the accumulation of filtration time, it is deposited at the bottom of inner core 15 inverted round stage The pollution particle in portion is stepped up, and the rate of filtration slowly declines, unfiltered filtrate edge in inner core 15 The hollow cylinder 16 at center rises, and now, pressure difference indicator 14 works, and monitors the change of its pressure, That is the stopping state of filter core 18 bottom inner core 15, if exceeding threshold value, then regulate automatically controlled set screw 9 reduce oil pressure relief, and open check-valves 24 simultaneously, make bottom inner core 15 containing more pollution particle Filtrate under differential pressure action, be discharged to oil returning tube 7 by inner core oil exit pipe 23, it is to avoid bottom filter core 18 blockage deteriorate, thus extend filter core 18 service life.

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

1), the fluid in fluid pressure line pass through wave filter 8, wave filter 8 decay the height in hydraulic system, In, the fluctuation pressure of low-frequency range, and suppression flowed fluctuation；

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

3), by magnetized module 33, oil return is magnetized, make micron-sized metallic particles aggregate into Bulky grain, delivers to the first adsorption module 34 afterwards；

4), magnetization aggregated particles is centrifugal in mechanical centrifugal module 38；

5), being adsorbed the magnetic polymeric particulate in oil return by the first adsorption module 34, oil return afterwards is sent It is centrifuged module 36 to rotating excitation field；

6), rotating excitation field is centrifuged module 36 and utilizes rotating excitation field to separate unadsorbed magnetic microparticles, it The second adsorption module 37 is delivered in rear oil return；

7), the magnetic polymeric particulate in the second adsorption module 37 second adsorption oil return；

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

9), the fluid of the most U-shaped separation of particles module 3 near-wall passes through oil returning tube oil inlet pipe 22 Being back to fuel tank after entering oil returning tube 7, the fluid of the pipeline center containing trace small particle particulate then leads to Cross inner core oil inlet pipe 12 to enter inner core 15 and carry out high-precision filtration；

10) fluid, carrying small particle particulate flows into the spiral flow of inner core 15 in the way of tangential influent stream Road 17, fluid is close to filter core flow under the influence of centrifugal force, and is carried out high-precision filtration；

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

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

Claims (10)

1. with the filtering of full frequency band structure changes, magnetization, rotating excitation field and centrifugal filter method, it is characterized in that: it uses a kind of filter, and this filter includes base plate, wave filter, U-shaped separation of particles module, oil returning tube, inner core, helical flow path, filter core, 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, efferent duct, S type elastic thin-wall, H mode filter and cascaded H mode filter；Wherein, described input pipe is connected to one end of shell, itself and hydraulic oil inlet docking；Described efferent duct is connected to the other end of shell, and itself and U-shaped separation of particles module are docked；Described S type elastic thin-wall is installed in shell along the radial direction of shell, forms expansion chamber and contraction chamber in it；Described input pipe, efferent duct and S type elastic thin-wall are collectively forming a S type cavity volume wave filter；Some taper structure changes damping holes are uniformly had in the axial direction of described S type elastic thin-wall；Described taper structure changes damping hole is made up of cone shaped elastic damping hole pipe and slot apertures；Resonance series cavity volume I and parallel resonance cavity volume is formed between described S type elastic thin-wall and shell；The outside of described resonance series cavity volume I sets a resonance series cavity volume II, inserts pipe by a taper and connect between described resonance series cavity volume I and resonance series cavity volume II；Described H mode filter is positioned at parallel resonance cavity volume, and it is connected with taper structure changes damping hole；Described cascaded H mode filter is positioned at resonance series cavity volume I and resonance series cavity volume II, and it is also connected with taper structure changes damping hole；Described H mode filter and cascaded H mode filter are axially symmetrical set, and form connection in series-parallel H mode filter；Described U-shaped separation of particles module includes a U-tube, U-tube is sequentially installed with temperature control module, magnetized module, mechanical centrifugal module, the first adsorption module, rotating excitation field are centrifuged module, the second adsorption module and demagnetization module；The top of described U-shaped separation of particles module and oil returning tube is connected by an oil returning tube oil inlet pipe；Described inner core is placed in outer barrel, if it is installed on end cap by a top board and bolt stem；Described helical flow path is contained in inner core, is connected by an inner core oil inlet pipe between itself and U-shaped separation of particles module；Described inner core oil inlet pipe is positioned at oil returning tube oil inlet pipe, and extends into the central authorities of U-shaped separation of particles module, and its diameter is less than oil returning tube oil inlet pipe diameter, and and oil returning tube oil inlet pipe be coaxially disposed；Described filter core is arranged on the inwall of inner core, and its precision is 1-5 micron；The bottom of said tub is provided with a hydraulic oil oil-out；

It comprises the steps:

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

2), phegma 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, enters magnetized module afterwards；

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

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

5), by the magnetic polymeric particulate in the first adsorption module absorption oil return, oil return afterwards is delivered to rotating excitation field and is centrifuged module；

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

7), the magnetic polymeric particulate in the second adsorption module second adsorption oil return；

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

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

10), the fluid carrying small particle particulate flows into the helical flow path of inner core in the way of tangential influent stream, and fluid is close to filter core flow under the influence of centrifugal force, and is carried out high-precision filtration；

11), 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 with the filtering of full frequency band structure changes, magnetization, rotating excitation field and centrifugal filter method, it is characterised in that: the axis of described input pipe and efferent duct is the most on the same axis；The wider place of described taper structure changes damping hole opening is positioned at resonance series cavity volume I and parallel resonance cavity volume, and its taper angle is 10 °；The Young's modulus of described taper structure changes damping hole cone shaped elastic damping hole pipe is bigger than the Young's modulus of elastic thin-wall, can be with change in fluid pressure stretching or compression；The Young's modulus of slot apertures is bigger than the Young's modulus of cone shaped elastic damping hole pipe, can be with fluid opened by pressure or closedown；Described taper is inserted the wider place of tube opening and is positioned at resonance series cavity volume II, and its taper angle is 10 °.

3. as claimed in claim 1 with the filtering of full frequency band structure changes, magnetization, rotating excitation field and centrifugal filter method, it is characterised in that: described temperature control module includes 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 resistance temperature sensor.

4. as claimed in claim 1 with the filtering of full frequency band structure changes, magnetization, rotating excitation field and centrifugal filter method, it is characterised in that: described magnetized module includes aluminium matter pipeline, some windings, iron shell, flange and some magnetizing current output modules；Wherein, described some windings are rotating around outside aluminium matter pipeline, and each winding is made up of positive winding and inverse winding；Described iron shell is coated on aluminium matter pipeline；Described flange welding is at the two ends of aluminium matter pipeline；Each magnetizing current output module is connected to a winding.

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

6. as claimed in claim 1 with the filtering of full frequency band structure changes, magnetization, rotating excitation field and centrifugal filter method, it is characterized 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, and both are connected with electric current in opposite direction so that forward solenoid and reverse solenoid adjacent produce like pole；Described irony magnetic conduction cap is arranged on the inwall of aluminium ring shape pipeline, and it is positioned at forward solenoid and reverse solenoid adjacent and forward solenoid and the intermediate point of reverse solenoid axis.

7. as claimed in claim 1 with the filtering of full frequency band structure changes, magnetization, rotating excitation field and centrifugal filter method, it is characterized in that: described first adsorption module 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 includes aluminium ring shape pipeline, forward solenoid, reverse solenoid, irony magnetic conduction cap, dividing plate, electric shock hammer and electromagnet；Described forward solenoid and reverse solenoid are respectively arranged in aluminium ring shape pipeline, and both are connected with electric current in opposite direction so that forward solenoid and reverse solenoid adjacent produce like pole；Described irony magnetic conduction cap is arranged on the inwall of aluminium ring shape pipeline, and it is positioned at forward solenoid and reverse solenoid adjacent and forward solenoid and the intermediate point of reverse solenoid axis；Described dividing plate is between forward solenoid and reverse solenoid；Described electric shock hammer and electromagnet are between dividing plate；Described electromagnet connects and can promote electric shock hammer, makes electric shock hammer tap aluminium ring shape inner-walls of duct.

8. use full frequency band structure changes filtering, magnetization, rotating excitation field and the centrifugal filter method described in claim 1, it is characterised in that: described rotating excitation field is centrifuged module and includes aluminium matter pipeline, iron shell, three-phase symmetric winding, flange and three-phase symmetrical current module；Described three-phase symmetric winding is wound on outside aluminium matter pipeline；Described iron shell is coated on aluminium matter pipeline；Described flange welding is at the two ends of aluminium matter pipeline；Described three-phase symmetrical current module connects described three-phase symmetric winding.

9. use full frequency band structure changes filtering, magnetization, rotating excitation field and the centrifugal filter method described in claim 1, it is characterised in that: the bottom of described oil returning tube is provided with an overflow valve, is provided with an automatically controlled set screw bottom this overflow valve；Described overflow valve is provided with an oil drain out, and this oil drain out is connected to a fuel tank by pipeline.

10. use full frequency band structure changes filtering, magnetization, rotating excitation field and the centrifugal filter method described in claim 1, it is characterized in that: the bottom of described inner core is 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 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.