CN106018212A - Wear particle online monitoring method using filtering, centrifugation and adjacent capacitance - Google Patents

Abstract

The invention relates to a wear particle online monitoring method using filtering, centrifugation and adjacent capacitance. Online monitoring is conduced sequentially by means of a filter, a temperature control module, a magnetization module, a mechanical centrifugation module, a rotary magnetic field centrifugation module, an adsorption module, an adjacent capacitance wear particle monitoring module and a demagnetization module. The filter is an S-type containing cavity full-band working condition self-adapting hydraulic filter, an oil inlet is formed in one end of the filter, and an oil outlet is formed in one end of the demagnetization module. The adjacent capacitance sensor technology based on the capacitance edge effect is introduced, and non-intrusive and unrestricted monitoring of wear particles is achieved. By means of the magnetization, mechanical centrifugation and rotary magnetic field centrifugation modules, wear particles in oil are magnetized and polymerized into large particles and move to the position near a pipe wall to be adsorbed by the adsorption module so that the intensity of output monitoring signals of an adjacent capacitance sensor can be increased. By means of the temperature control module and a reasonably designed polar plate structure of the adjacent capacitance sensor, noise is suppressed, and the overall performance of an adjacent capacitance sensor monitoring device is optimized.

Description

A kind of filtering, the centrifugal and wear particle on-line monitoring method of adjacent capacitor

[technical field]

The present invention relates to the wear particle on-line monitoring method in a kind of fluid pressure line fluid, be specifically related to A kind of filtering, the centrifugal and wear particle on-line monitoring method of adjacent capacitor, belong to hydraulic system skill Art field.

[background technology]

Wear particle in hydraulic system oil liquid not only can make kinematic pair produce abrasive wear but also can So that the relative motion of kinematic pair is obstructed and is caused control component actuation malfunctioning.Statistics both domestic and external Showing, hydraulic machinery 70% fault is derived from the particle contamination of fluid.Therefore, micro-to the abrasion in fluid Grain carries out on-line monitoring and has become one of important channel reducing abrasion and hydraulic system fault.

Capacitance sensor is applied to the pollution prison of machine fluid because it is easy to make, with low cost Survey.Patent documentation 1 (Chinese invention patent Authorization Notice No. CN 101435788B) discloses a kind of base In online oil liquid monitoring sensor and the system thereof of dielectric constant measurement, the sensor of this invention includes propping up Seat and be fixed on inside three poles, three poles constitute differential cylindrical capacitor, can monitor The minor variations of sensor capacitance value, thus the anti-minor variations pushing away fluid dielectric constant, and then realize Enforcement to contamination level of oil liquid is monitored.Sensor pole in this monitoring method is immersed in fluid, makes Become the change of fluid fluidised form, have impact on certainty of measurement；It is heavy that fluid can be formed on sensor pole surface Long-pending oil film, not only causes certainty of measurement to decline, and the most also brings sensor to clean problem.

Document 2 (Zhao Xinze etc., Wuhan Univ. of Water Conservancy and Electric Power's journal, 1999 (3)) public Opened a kind of Probe with Capacitor Sensor Used in Oil Monitoring, this probe by a cylindrical glass pipe be close to The two halves circular electrode composition of this pipe outer wall, it is substantially parallel plate capacitor sensor.This capacitance sensing Device excitation pole plate is retrained by conduit under fluid pressure diameter, owing to conduit under fluid pressure diameter is relative with receiving polar plate spacing Relatively big, this transducer sensitivity is not ideal enough.

Meanwhile, the wear particle of prior art carries out the fluid big ups and downs in on-line monitoring equipment, meeting Cause Monitoring Data to fluctuate widely and cause monitoring unsuccessfully.

Therefore, for solving above-mentioned technical problem, using of a kind of innovation of necessary offer filters, is centrifuged With the wear particle on-line monitoring method of adjacent capacitor, 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 one filtering, centrifugal and phase The wear particle on-line monitoring method of adjacent electric capacity, it uses non-invasive metering system, to measured Without binding character, signal is strong and highly sensitive, low cost, environmental suitability are strong in monitoring.

For achieving the above object, the technical scheme that the present invention takes is: one filtering, centrifugal and phase The wear particle on-line monitoring method of adjacent electric capacity, it uses a kind of monitoring device, and this equipment includes filtering Device, temperature control module, magnetized module, mechanical centrifugal module, rotating excitation field be centrifuged module, adsorption module, Adjacent capacitor particulate matter monitoring module and demagnetization module；Wherein, described wave filter, temperature control module, magnetic Change module, mechanical centrifugal module, rotating excitation field are centrifuged module, adsorption module, adjacent capacitor microgranule prison Survey module and demagnetization module is sequentially connected with；One end of described wave filter is provided with fluid entrance, and it includes defeated Enter pipe, shell, outlet tube, S type elastic thin-wall, plug-in type H mode filter, plug-in type cascaded H Mode filter and colloid damping layer；Wherein, described input pipe is connected to one end of shell；Described defeated Go out pipe and be connected to the other end of shell；Described S type elastic thin-wall is installed in shell along the radial direction of shell, Expansion chamber and contraction chamber is formed in it；Described input pipe, outlet tube and S type elastic thin-wall are collectively forming One S type cavity volume wave filter；Between described S type elastic thin-wall and shell formed resonance series cavity volume I, Resonance series cavity volume II and parallel resonance cavity volume；Described resonance series cavity volume I and resonance series cavity volume Separated by an elastic baffle between II；Some cones are uniformly had in the axial direction of described S type elastic thin-wall Shape damping hole；Uniformly having some tapers in the axial direction of described elastic baffle and insert pipe, described taper is inserted Enter pipe connection resonance series cavity volume I and resonance series cavity volume II；Described plug-in type H mode filter is positioned at In parallel resonance cavity volume, it is connected with conical damping hole；Described plug-in type cascaded H mode filter position In resonance series cavity volume I and resonance series cavity volume II, 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 insertion Formula connection in series-parallel H mode filter；Described colloid damping layer is arranged on the inner side of S type elastic thin-wall；Described One end of demagnetization module is provided with fluid outlet, and it is made up of remanent magnetism sensor and demagnetizer；

It comprises the steps:

1), the fluid in fluid pressure line carries wear particle by wave filter, by filter attenuation liquid The fluctuation pressure of the high, medium and low frequency range in pressure system, and suppression flowed fluctuation；

2), oil liquid temperature is controlled by temperature control module constant at 42 DEG C；

3), magnetized module is force-magnetized by the wear particle that carries in fluid, makes micron-sized abrasion Particle aggregation becomes bulky grain

4), magnetization aggregated particles initial centrifugation in mechanical centrifugal module；

5), rotating excitation field module carries out secondary centrifuging to magnetization aggregated particles；

6), adsorption module adsorbs the magnetization polymerization being gathered in near-wall after rotated magnetic field module is centrifuged Big microgranule；

7), by wear particle situation in adjacent capacitor particulate matter monitoring module online monitoring fluid pressure line；

8), demagnetization module is to magnetized particles demagnetization.

The present invention uses filtering, centrifugal and adjacent capacitor wear particle on-line monitoring method further For: the axis of described input pipe and outlet tube is the most on the same axis；Described conical damping hole opening is relatively Being positioned at resonance series cavity volume I and parallel resonance cavity volume at Kuan, its taper angle is 10 °；Described taper Inserting the wider place of tube opening and be positioned at resonance series cavity volume II, its taper angle is 10 °；Described taper is inserted Mutually stagger in the position entering pipe and conical damping hole；The internal layer of described colloid damping layer and outer layer are respectively Outer layer S type elastic thin-wall and internal layer S type elastic thin-wall, outer layer S type elastic thin-wall and internal layer S type bullet Property thin-walled between connected by some pillars are fixing；Described outer layer S type elastic thin-wall and internal layer S type are elastic It is filled with the pure water adding antifreezing agent in interlayer between thin-walled, in pure water, is suspended with Bio-sil； Described colloid damping layer is connected with shell near one end of outlet tube；Described colloid damping layer is near input One end of pipe is provided with circular piston, is tightly connected between piston and colloid damping layer.

The present invention uses filtering, centrifugal and adjacent capacitor wear particle on-line monitoring method further For: described temperature control module includes heater, cooler and temperature sensor；Described heater uses band The lubricating oil heater of the Chongqing gold letter of temperature detection；Surface evaporative air cooling selected by described cooler Device, the finned tube of cooler selects KLM type finned tube；Temperature sensor uses platinum resistance temperature sensing Device.

The present invention uses filtering, centrifugal and adjacent capacitor wear particle on-line monitoring method further For: described magnetized module includes aluminum matter pipeline, some windings, iron shell, flange and some magnetic Galvanic current output module；Wherein, described some windings are rotating around outside aluminum matter pipeline, and each winding is by just Winding and inverse winding form, and the size of current in positive winding and inverse winding is equal；Described iron shell bag It is overlying on aluminum matter pipeline；Described flange welding is at the two ends of aluminum matter pipeline；Each magnetizing current output mould Block is connected to a winding.

The present invention uses filtering, centrifugal and adjacent capacitor wear particle on-line monitoring method further For: described mechanical centrifugal module uses eddy flow to be centrifuged module；Described eddy flow is centrifuged module and includes cyclone pipe Wall, the first flow deflector, the second flow deflector, motor and flow transducer；Wherein, described One flow deflector is provided with 3, and these 3 first flow deflectors are uniformly distributed along tube wall inner periphery every 120 °, Its laying angle is set to 18 °；Described second flow deflector and the first flow deflector structure are identical, and it is arranged on After one 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；Its leading edge Frustrating into obtuse, trailing edge is processed into wing, and its height is 0.4 times of tube wall diameter, and a length of tube wall is straight 1.8 times of footpath；Described motor connects and drives the first flow deflector and the second flow deflector, with regulation Laying angle；Described flow transducer is arranged on the central authorities in tube wall.

The present invention uses filtering, centrifugal and adjacent capacitor wear particle on-line monitoring method further For: described rotating excitation field is centrifuged module and includes aluminum matter pipeline, iron shell, three-phase symmetric winding, method Orchid and three-phase symmetrical current module；Described three-phase symmetric winding is wound on outside aluminum matter pipeline；Described irony Shell is coated on aluminum matter pipeline；Described flange welding is at the two ends of aluminum matter pipeline；Described three-phase symmetrical Current module connects described three-phase symmetric winding.

The present invention uses filtering, centrifugal and adjacent capacitor wear particle on-line monitoring method further For: described adsorption module uses homopolarity adjacent type absorbing ring；Described homopolarity adjacent type absorbing ring includes aluminum Matter circulating line, forward solenoid, reverse solenoid and irony magnetic conduction cap；Described forward solenoid Being respectively arranged in aluminium ring shape pipeline with reverse solenoid, both are connected with electric current in opposite direction, make Obtain forward solenoid and reverse solenoid adjacent produces like pole；Described irony magnetic conduction cap is arranged in On the inwall of aluminium ring shape pipeline, it is positioned at forward solenoid and reverse solenoid adjacent, Yi Jizheng To solenoid and the intermediate point of reverse solenoid axis.

The present invention uses filtering, centrifugal and adjacent capacitor wear particle on-line monitoring method further For: described adsorption module uses the homopolarity adjacent type absorbing ring of charged hammer；Described charged hammer same The most adjacent type absorbing ring 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 be respectively arranged in In aluminium ring shape pipeline, both are connected with electric current in opposite direction so that forward solenoid and reverse helical Pipe adjacent produces like pole；Described irony magnetic conduction cap is arranged on the inwall of aluminium ring shape pipeline, It is positioned at forward solenoid and reverse solenoid adjacent and forward solenoid and reverse solenoid axle The intermediate point of line；Described dividing plate is between forward solenoid and reverse solenoid；Described electric shock hammer and Electric magnet is between dividing plate；Described electric magnet connects and can promote electric shock hammer, makes electric shock hammer tap aluminum Matter circulating line inwall.

The present invention uses filtering, centrifugal and adjacent capacitor wear particle on-line monitoring method further For: described adjacent capacitor particulate matter monitoring module includes organic glass inner wall, ground shield, receiving pole Plate, excitation pole plate and outer wall；Wherein, described machine glass inner wall, ground shield and outer wall are pipe Shape structure, and from-inner-to-outer is arranged successively；The thickness of described machine glass inner wall is 0.5mm, and dielectric is normal Number is 2.5；The dielectric constant of described ground shield is 1.5-2.5, and thickness is 1 to the 2 of outer wall thickness Times；Described reception pole plate, excitation pole plate are embedded in ground shield, and are positioned at outside machine glass inner wall Side；Described reception pole plate, excitation pole plate all use Peano curve structure pole plate layer, set between the two There is sealing coat；The width of described sealing coat is 0.8-1 times of lucite inner wall thickness.

The present invention with filtering, centrifugal and adjacent capacitor wear particle on-line monitoring method is also: its Including an ECU, described wave filter, remanent magnetism sensor, demagnetizer, heater, cooler, temperature Sensor, magnetizing current output module, mechanical centrifugal module, rotating excitation field are centrifuged module, absorption mould Block and adjacent capacitor particulate matter monitoring module are all electrically connected on ECU.

Compared with prior art, there is advantages that

1. the magnetized module of the multipair forward and reverse loop construction of the present invention, coil current can numeral set online Fixed, to produce the non-uniform magnetic-field that magnetization needs, make the wear particle in fluid force-magnetized and be polymerized Become bulky grain, make colloidal particles decompose simultaneously and melt and suppress air bubble growth；Mechanically and magnetically field centrifugal mold Block makes magnetic microparticles " separate " and moves to cavity wall；Poly-by the magnetization of adsorption module capture duct wall surface Close bulky grain.

2. in fluid pressure line wear particle monitoring device, introduce adjacent electricity based on electric capacity edge effect Hold sensor, by wear particle magnetizing, aggregates into bulky grain the centrifugal tube wall that is adsorbed onto to improve Granule density, increases the dielectric constant of tube wall surface fluid, greatly improves sensor output signal strong Degree the ingenious contradiction solving signal intensity and the conflict of penetration depth index.

3. in pole plate layer designs, introduce efficient frontier length and baroque Peano curve structure. In this Peano curve structure pole plate layer, excitation pole plate, reception pole plate and the curve of isolation pole plate composition All of point in square pole plate layer can be traveled through, obtain one and be full of whole square pole plate sheaf space Curve.In the case of pole plate aspect is amassed and fixed, this structure has the longest efficient frontier, maximum pole plate Area and labyrinth, obtain optimum signal intensity with this.

4. wave filter can be decayed the fluctuation pressure of the high, medium and low frequency range in hydraulic system, and can suppress Flowed fluctuation, it is ensured that monitoring result is accurate.

5. wave filter, temperature control module, magnetized module, mechanical centrifugal module, rotating excitation field be centrifuged module, The fluid pressure line wear particle monitoring technology road that adsorption module, adjacent capacitor particulate matter monitoring module combine Line, both ensure that monitoring reliability, and the overall performance simultaneously making again monitoring system is optimum.

[accompanying drawing explanation]

Fig. 1 is that using of the present invention filters, is centrifuged and the wear particle on-line monitoring equipment of adjacent capacitor Structural representation.

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 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 S type cavity volume wave filter.

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

Figure 10 is the Longitudinal cross section schematic of colloid damping layer.

Figure 11 is the structure chart of the magnetized module in Fig. 1.

Figure 12 is the structure chart of the magnetizing coil in Figure 11.

Figure 13 is the structure chart of the magnetizing current output module in Figure 11.

Figure 14-1 is the horizontal schematic diagram that the eddy flow in Fig. 1 is centrifuged module.

Figure 14-2 is the radial direction schematic diagram that the eddy flow in Fig. 1 is centrifuged module.

Figure 15 is that the rotating excitation field in Fig. 1 is centrifuged module diagram.

Figure 16 be the adsorbent equipment in Fig. 1 be the structural representation of homopolarity adjacent type absorbing ring.

Figure 17 be the adsorbent equipment in Fig. 1 be that the structure of the homopolarity adjacent type absorbing ring of charged hammer is shown It is intended to.

Figure 18-1 is the radial direction semi-cutaway of the adjacent capacitor particulate matter monitoring module in Fig. 1.

Figure 18-2 is the transverse cross-sectional view of the adjacent capacitor particulate matter monitoring module in Fig. 1.

Figure 18-3 is receiving pole plate and encouraging the schematic diagram of pole plate in Figure 18-1.

Figure 18-4 is the partial enlarged drawing in Figure 18-3 at A.

Figure 19 is the connection diagram of ECU.

[detailed description of the invention]

Refer to shown in Figure of description 1 to accompanying drawing 19, the present invention be one filtering, centrifugal and The wear particle on-line monitoring equipment of adjacent capacitor, it is by wave filter 8, temperature control module 1, magnetization Block 2, mechanical centrifugal module 3, rotating excitation field are centrifuged module 4, adsorption module 5, adjacent capacitor microgranule Several parts compositions such as monitoring modular 6, demagnetization module 7 and ECU 10.Wherein, described wave filter 8, Temperature control module 1, magnetized module 2, mechanical centrifugal module 3, rotating excitation field are centrifuged module 4, absorption mould Block 5, adjacent capacitor particulate matter monitoring module 6 and demagnetization module 7 are sequentially connected with.

One end of described wave filter 8 is provided with fluid entrance 91, is used for defeated for hydraulic oil people's device, and can The fluctuation pressure of the high, medium and low frequency range in decay hydraulic system, and suppression flowed fluctuation, it is ensured that prison Survey result is accurate.Described wave filter 8 is by input pipe 81, shell 89, outlet tube 811, S type elasticity Several portions such as thin-walled 87, plug-in type H mode filter 812 and plug-in type cascaded H mode filter 813 It is grouped into.

Wherein, described input pipe 81 is connected to one end of shell 89；Described outlet tube 811 is connected to The other end of shell 89.Described S type elastic thin-wall 87 is installed in shell 89 along the radial direction of shell, Expansion chamber 71 and contraction chamber 72 is formed in it.The axis of described input pipe 81 and outlet tube 811 does not exists On same axis, so can improve the filter effect of more than 10%.

Described input pipe 81, outlet tube 811 and S type elastic thin-wall 87 are collectively forming a S type cavity volume Wave filter, thus hydraulic system high frequency pressure pulsations of decaying.The filter obtained after processing by lumped-parameter method Ripple 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, the class ∏ type resistance wave filter of S type cavity volume 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 Height, then transmission coefficient is the least, and this shows that the pressure pulse wave of high frequency is decayed more when device after filtering Severity, thus serve the effect eliminating high frequency pressure pulsations.Meanwhile, the S type cavity volume knot of the present invention In structure, transitions smooth between expansion chamber and contraction chamber, contribute to reduce cavity diameter sudden change bring be The system pressure loss.The input pipe of wave filter and outlet tube the most on the same axis, can improve 10% with On filter 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 stream exceedes average discharge, and the expansion chamber of expansion can absorb unnecessary liquid Stream, and when less than average discharge, release liquid stream, 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 vibration Pulsation.The S type 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 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 natural 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 Natural 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, owing to there being pillar fixing even between inside and outside wall Connecing, inside and outside elastic thin-wall does periodic vibration by the frequency of fluctuation pressure simultaneously, and this forced vibration consumes The pressure fluctuation energy of fluid, thus realize the filtering of Mid Frequency pressure.From the principle of virtual work, bullet Property thin-walled potential energy when consuming the ability of fluid pulsation pressure energy and its forced vibration and kinetic energy sum Directly related, in order to improve Mid Frequency filtering performance, the radial design of elastic thin-wall is much larger than pipeline Radius, and the thickness of thin-walled is less, representative value is less than 0.1mm.

Further, between described S type elastic thin-wall 87 and shell 89 formed resonance series cavity volume I84, Resonance series cavity volume II83 and parallel resonance cavity volume 85, described cavity volume 83,84,85 is across whole Wave filter, it is hereby achieved that bigger resonance cavity volume volume, strengthens attenuating.Described series connection is altogether Shake and separated by an elastic baffle 810 between cavity volume I84 and resonance series cavity volume II83.Described S type Uniformly having some conical damping holes 86 in the axial direction of elastic thin-wall 87, described conical damping hole 86 is opened The wider place of mouth is positioned at resonance series cavity volume I84 and parallel resonance cavity volume 85, and its taper angle is 10 °. Uniformly having some tapers in the axial direction of described elastic baffle 810 and insert pipe 82, pipe is inserted in described taper 82 connection resonance series cavity volume I84 and resonance series cavity volume II83.Pipe 82 opening is inserted in described taper Wider place is positioned at resonance series cavity volume II83, and its taper angle is 10 °, and pipe 82 is inserted in described taper Mutually stagger with the position of conical damping hole 86.

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

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

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

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

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

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

Wherein:

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

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

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

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

Described plug-in type H mode filter 812 and plug-in type cascaded H mode filter 813 are the most symmetrically Arrange, and form plug-in type connection in series-parallel H mode filter, for broadening frequency filtering scope and make entirety More compact structure.The multiple plug-in type connection in series-parallel H mode filters of the present invention circumferentially interface distributions (figure In only depict 2), separate with dividing plate 820 each other, the resonance bands of these multiple wave filter Different, whole medium and low frequency filtering frequency range can be covered after combining, it is achieved medium and low frequency section comprehensively Entire spectrum filtering.

By Fig. 6 plug-in type H mode filter and plug-in type cascaded H mode filter frequency characteristic and formula (1) (2) (3) all can find, plug-in type cascaded H mode filter has 2 natural angular frequencies, At crest, filter effect is preferable, does not the most substantially have filter effect at trough；Plug-in type H type filters Device has 1 natural angular frequency, and at crest, filter effect is preferable equally, does not the most substantially have at trough There is filter effect；Select suitable filter parameter, make the natural angular frequency of plug-in type H mode filter Just fall between 2 natural angular frequencies of plug-in type cascaded H mode filter, as it is shown in fig. 7, both The natural reonant frequency peak value of 3 next-door neighbours is defined, in this frequency range in certain frequency range In, no matter the fluctuating frequency of pressure is at crest or all can guarantee that preferable filter effect at trough. The bank of filters that multiple plug-in type connection in series-parallel H mode filters are constituted both can cover whole medium and low frequency section, real The entire spectrum filtering of existing medium and low frequency section.

Further, the inner side of described S type elastic thin-wall 87 is provided with colloid damping layer 88.Described The internal layer of colloid damping layer 88 and outer layer are respectively outer layer S type elastic thin-wall 81 and internal layer S type is elastic Thin-walled 82, by some pillars between outer layer S type elastic thin-wall 81 and internal layer S type elastic thin-wall 82 814 fixing connections.Interlayer between outer layer S type elastic thin-wall 81 and internal layer S type elastic thin-wall 82 Inside it is filled with the pure water 816 adding antifreezing agent, in pure water 816, is suspended with Bio-sil 815.Institute State colloid damping layer 88 to be connected with shell 89 near one end of input pipe 811；Described colloid damping layer 88 are provided with circular piston 817, piston 817 and colloid damping layer 88 near one end of input pipe 811 Between be tightly connected.

Due to outer layer S type elastic thin-wall 81 with internal layer S type elastic thin-wall 82 spacing is the least and by pillar 814 fixing connections, when pressure fluctuation acts perpendicularly to thin-walled, inside and outside wall produces and is close to consistent shape Becoming, colloid damping layer thickness is kept approximately constant, and pressure fluctuation is not had damping action；Colloid damps The flow pulsation in 817 sensation level directions of piston of 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 defeated by nanoscale Passage is sent to enter micron order central void；When flow pulsation weakens, piston 817 by back-pressure, now glue Body damping layer expands, and the water in colloid damping layer is discharged through passage from central void.In the process, Mechanics effect, the roughness effect of channel surface molecular scale and change due to silica gel 815 microchannel sorption Learning heterogeneous body effect, piston is followed colloid damping layer and is shunk and do " gas-liquid-solid " limit in expansion process The interfactial work on boundary, thus flow systolic implementation is decayed, its substantially parallel R mode filter. This wave filter is relative to the advantage of general liquid condenser: it passes through " gas-liquid-solid " border The mode of interfactial work decay flow pulsation, a large amount of machinery can be absorbed in the case of not producing heat Can, and energy expenditure do not relies on piston speed, extinction efficiency is obviously improved.

The present invention can also the pulsation decay of solid line operating mode self-adaptive pressure.When hydraulic system working conditions change, Both executive component stopped suddenly or ran, and when the opening of valve changes, can cause the spy of pipe-line system Property impedance is undergone mutation, so that former pipeline pressure curve with change in location in time changes the most therewith Become, then the position of pressure peak also changes.Axial length design due to the wave filter of the present invention For pulsing wavelength, and the plug-in type connection in series-parallel H mode filter group of wave filter more than system main pressure Cavity volume length, the length of S type cavity volume wave filter and the length of S type elastic thin-wall 87 and wave filter axis Length is equal, it is ensured that pressure peak position is constantly in the effective range of wave filter；And bore Shape damping hole 86 is opened on S type elastic thin-wall 87, is uniformly distributed in the axial direction, at elastic baffle Pipe 82, conical damping hole 86 He are inserted in the taper uniformly having multiple identical parameters in the axial direction of 810 Taper is inserted pipe 82 position and is mutually staggered so that pressure peak change in location is several to the performance of wave filter Not impact, it is achieved thereby that operating mode adaptive-filtering function.Axial in view of three kinds of filter structures Size and wave filter are suitable, and this bigger size also ensure that hydraulic filter possesses stronger pressure Pulsation damping capacity.

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

1), hydraulic fluid enters S type cavity volume wave filter by input pipe, and it is unnecessary that the cavity volume of expansion absorbs Liquid stream, completes the filtering of high frequency pressure pulsations；

2), by 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 plug-in type connection in series-parallel H mode filter group, and conical 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 Plug-in type connection in series-parallel H mode filter length, S type cavity volume filter length and S type elastic thin-wall 87 Length is equal with filter length, makes pressure peak position be constantly in the useful effect model of wave filter Enclose, it is achieved the filtering of pressure fluctuation when system condition changes.

Described temperature control module 1 is made up of heater, cooler and temperature sensor.This temperature control module 1 Main purpose is to provide optimal magnetization temperature about 42 DEG C for magnetizing assembly.Meanwhile, temperature is as the most main The environment noise wanted, different temperature can cause the fluid dielectric constant in fluid pressure line that notable change occurs Change, keep temperature constant that adjacent capacitive sensors can be avoided to be affected by temperature noise.

Described heater is electric heater, can use the lubricating oil of the Chongqing gold letter of band temperature detection own Heater.Cooler can be selected for remover for surface evaporation type air cooling, the advantage having water-cooled and air cooling concurrently, heat radiation Effective, use light pipe, fluid resistance is little；Cooler fin type is high wing, and finned tube selects KLM Type finned tube, good heat-transfer, thermal contact resistance is little, and fin is big with pipe contact area, and laminating is tight, Firmly, it is good to bear cold and hot sudden turn of events ability, and fin root weather-resistant performance is high；The bank of tubes of air cooler Number optimum is 8.Temperature sensor uses platinum resistance temperature sensor.

Described magnetizing assembly 2 can force-magnetized by the wear particle that carries in fluid, and make micron order Wear particle aggregate into bulky grain, the output signal strength of adjacent capacitive sensors can be improved.Meanwhile, From electromagnetic theory, magnetic field intensity is the biggest, the biggest to the captivation of ferromagnetic particle, greatly The iron granules translational speed of size is more faster than undersized iron granules, and wear particle is aggregated into big Grain also allows for later separation.

The colloidal particles carried in fluid and the dielectric constant of bubble and hydraulic oil and wear particle Dielectric constant is different from, and impacts in order to avoid monitoring adjacent capacitive sensors below, needs Non-uniform magnetic-field to be designed decomposes or removes colloidal particles and bubble.

Making Molecular alignment opinion according to magnetic field, when fluid flows through magnetic field, magnetic field is to the glue in fluid The athletic meeting of matter granule produces certain impact so that colloidal particles makees olderly flowage in pipeline, subtracts Lack being connected with each other of colloidal particles, thus play the viscosity reduction effect separating colloidal particles.Meanwhile, magnetic There is cohesiveness between the granule changed, this power limits the formation of bubble and grows up.Oil during bubble-free The magnetic line of force in liquid is evenly distributed, and is in the steady state of magnetic.When fluid has bubble, bubble local The magnetic line of force occur curved had by, the magnetic line of force of bending revert to becoming of the most uniform, parallel, steady statue Gesture, thus produce the magnetic tension pointing to bubble center, this power can limit growing up of bubble.

But magnetic field is the strongest or the most weak magnetic treating result being all difficult to obtain.When magnetic induction is a certain Time near value, magnetic treatment has optimum efficiency.Equally, the highest and the lowest viscosity reducing effect of temperature is the most bad. The viscosity reduction that decomposes of the colloidal particles in hydraulic oil needs certain temperature and magnetic field intensity, and representative value is magnetic Field intensity at about 200mT, temperature about 42 DEG C.Magnetic field to be considered during design non-uniform magnetic-field The impact that edge effect is caused, magnetic induction should be designed as relatively strong in one end that fluid flows into, and The one end flowed out at fluid is more weak, meets fluid outflow end, reduces magnetic field, alleviates edge effect impact Requirement, ensure simultaneously fluid flow into end magnetic efficiency.

The magnetizing assembly of the present invention is by aluminum matter pipeline 21, some windings 22, iron shell 23, flange 24 and some magnetizing current output modules 25 form.Wherein, described aluminum matter pipeline 21 make fluid from Wherein flow through and by magnetization treatment, and the pcrmeability of aluminum is the lowest, can make to obtain relatively in pipeline 21 High magnetic field intensity.

Described some windings 22 are rotating around outside aluminum matter pipeline 21, by the copper of a diameter of about 1.0mm Silk coating insullac is made.Each winding 22 is all separate setting, respectively by magnetizing accordingly Current output module 25 controls, and wherein electric current needs different according to system.Owing to often enclosing winding 22 is separate, and the electric current loop that its exit can cause this coil to form is not real " justifying ", and Being to have individual breach, this can cause the radial distribution of aluminum matter pipeline 21 internal magnetic field uneven, thus affects Magnetic efficiency.For solving this problem, the often circle winding 22 of this creation is all by positive winding 26 and inverse winding 27 compositions are in order to produce the magnetic field in same polarity direction and make up magnetic field that breach causes not simultaneously Equilibrium.Size of current in positive winding and inverse winding is equal.Aluminum matter pipeline 21 axis direction is arranged Show multipair forward and reverse winding, by different electric currents, in order to form the non-uniform magnetic-field of aforementioned claim.

Described iron shell 23 is coated on aluminum matter pipeline 21, and the material of irony can mask major part Magnetic flux.Described flange 24 is welded on the two ends of aluminum matter pipeline 21.

Each magnetizing current output module 25 is connected to a winding 22, and by ECU10 control, its profit Have and ECU10 real-time communication the feature of real time modifying resistance with digital potentiometer, it is achieved non-homogeneous The real-time control in magnetic field.The digital potentiometer that described magnetizing current output module 25 uses is AD5206, There is the output of 6 passages, can and ECU between realize single bus data transmission.ECU is by single Bus realizes current settings and the constant output of the polylith magnetizing current output module to magnetization winding.Fortune Put AD8601 and metal-oxide-semiconductor 2N7002 and achieve the output of high-precision voltage follow by negative feedback. Constant High-current output have employed amplifier OPA 549 of the high voltage of Texas Instrument (TI), big electric current.

Described centrifugal device 3 makes fluid under the action of the centrifugal, and the magnetized particles that quality is bigger is thrown toward chamber Wall, the bubble in fluid then shifts at the central axis of pipeline under centrifugal action, and it selects rotation Wander about as a refugee core module 3.

Described eddy flow is centrifuged module 3 and uses the mode of energy loss, and its design principle is as follows: at pipeline The flow deflector of the middle distortion that certain altitude and length are set, and make blade face tangent line become certain angle with axis Degree, because of pipe flow border change can make fluid produce spiral flow in pipes, this spiral flow can be analyzed to around The circumferential flow of pipe axle and axial straight flowing, the particulate matter carried in fluid produces off-axis alignment heart spiral shell Rotation motion.This eddy flow is centrifuged module 3 by eddy flow tube wall the 31, first flow deflector the 32, second flow deflector 33, several parts such as motor 34 and flow transducer 35 composition, described motor 34 He Flow transducer 35 is electrically connected to ECU10.

Wherein, described first flow deflector 32 is provided with 3, and these 3 first flow deflectors 32 are along tube wall 31 Inner periphery is uniformly distributed every 120 °, and its laying angle is (between the first flow deflector 32 and eddy flow tube wall 31 Angle) be set to 18 °, to ensure optimal tangential flowing.Described second flow deflector 33 and first is led Flow 32 structure is identical, after it is arranged on the first flow deflector 32, and staggers with the first flow deflector 32 60 ° are connected in tube wall 31, and its laying angle is set to 36 DEG C, are used for reducing resistance and strengthening peripheral flow Dynamic intensity.It addition, the 3rd or more flow deflector can be arranged the most again according to actual separation effect, Laying angle gradually increases.Described motor 34 connects and drives the first flow deflector 32 and the second water conservancy diversion Sheet 33, to regulate laying angle, thus can obtain more preferable centrifugal effect, know make flow deflector 32, 33 adapt to different operating modes.Described flow transducer 35 is arranged on the central authorities in tube wall 31, ECU10 By the numerical analysis cyclonic separation effect of reading flow quantity sensor 35, and control motor accordingly 34, motor 34 regulates the laying angle of each flow deflector 32,33, to obtain more separating effect.

Further, the long limit of described first flow deflector 32 is connected with tube wall 31, and minor face 33 is along pipe The axis of wall 31 extends；For reducing resistance, its leading edge frustrates into obtuse；For avoiding streaming, trailing edge adds Work becomes wing；Its height is 0.4 times of tube wall 31 diameter, makes the spiral flow of formation have bigger strong Degree；1.8 times of a length of tube wall 31 diameter, to ensure the bigger sphere of action to fluid.

Described rotating magnetic field device 4 by aluminum matter pipeline 41, iron shell 42, three-phase symmetric winding 43, Flange 44 and three-phase symmetrical current module 45 form.Described three-phase symmetric winding 43 is wound on aluminum matter Outside pipeline 41.Described iron shell 42 is coated on aluminum matter pipeline 41.Described flange 44 is welded on The two ends of aluminum matter pipeline 41.Described three-phase symmetrical current module 45 connects described three-phase symmetric winding 43, And by ECU10 control.

The operation principle of described rotating magnetic field device 4 is as follows: due to polymeric macroparticle absolute mass relatively Little, after eddy flow is centrifuged module 3 initial centrifugation, though magnetization polymeric macroparticle has been thrown off conduit axis, But not yet close to tube wall, need to carry out secondary centrifuging.Magnetization polymeric macroparticle enters described rotation with fluid After turning magnetic field device 4, flowing through three-phase symmetrical electric current in three-phase symmetric winding 43, this electric current is in aluminum matter Rotating excitation field is produced in pipeline 41.Magnetized particles is acted on by magnetic field force under rotating excitation field effect, And the most spirally advance, simultaneously to aluminum matter pipeline 41 vessel wall motion.Rationally adjust Joint magnetic field intensity can make the granule in fluid " separate " out from fluid, is gathered in aluminum matter pipeline 41 near-wall, it is simple to subsequent adsorbtion.

Described adsorption module 5 is gathered in near-wall for adsorbing after rotated magnetic field device 4 is centrifuged Magnetization is polymerized big microgranule.When described adsorption module 5 uses homopolarity adjacent type absorbing ring, this homopolarity is adjacent Type absorbing ring is led by aluminium ring shape pipeline 51, forward solenoid 52, reverse solenoid 53 and irony Magnetic cap 54 parts such as grade form.Wherein, described forward solenoid 52 and reverse solenoid 53 cloth respectively In being placed in aluminium ring shape pipeline 51 and by ECU10 control, both are connected with electric current in opposite direction, make Obtain forward solenoid 52 and reverse solenoid 53 adjacent produces like pole.Described irony magnetic conduction cap On 54 inwalls being arranged in aluminium ring shape pipeline 51, it is positioned at forward solenoid 52 and reverse solenoid 53 adjacents and forward solenoid 52 and the intermediate point of reverse solenoid 53 axis.

The design principle of described homopolarity adjacent type absorbing ring is as follows: have multiple ribbon core inside absorbing ring Energization solenoid, adjacent solenoid coil is connected with electric current in opposite direction so that forward solenoid and Reverse solenoid adjacent produces like pole.Meanwhile, forward solenoid and reverse solenoid adjacent, And it is provided with irony magnetic conduction at the absorbing ring inwall of forward solenoid and reverse solenoid axis intermediate point Cap, parallel with absorbing ring axis in strip, the shell of absorbing ring is paramagnetism aluminum matter outer tube wall, this It is provided with and beneficially improves magnetic circuit, strengthen the magnetic field intensity at absorbing ring inwall, strengthen the capture to granule Absorbability.Each solenoid current is directly controlled by ECU, can be according to the size of granule and concentration Different and change, to obtain optimal adsorption performance.After having adsorbed, ECU controls electric magnet power-off, Paramagnetism aluminum matter pipeline loses magnetism, and is attached to magnetic polymeric bulky grain on inner-walls of duct and manages with fluid edge Wall enters adjacent capacitor particulate matter monitoring module.

Further, during the homopolarity adjacent type absorbing ring that described adsorbent equipment 5 may be used without charged hammer, The homopolarity adjacent type absorbing ring of this charged hammer is by aluminium ring shape pipeline 51, forward solenoid 52, anti- To parts such as solenoid 53, irony magnetic conduction cap 54, dividing plate 55, electric shock hammer 56 and electric magnet 57 Composition.Wherein, described forward solenoid 52 and reverse solenoid 53 are respectively arranged in aluminium ring shape pipe In road 51 and by ECU10 control, both are connected with electric current in opposite direction so that forward solenoid 52 Like pole is produced with reverse solenoid 53 adjacent.Described irony magnetic conduction cap 54 is arranged in aluminium ring On the inwall of shape pipeline 51, its be positioned at forward solenoid 52 and reverse solenoid 53 adjacent, with And forward solenoid 52 and the intermediate point of reverse solenoid 53 axis.Described electric shock hammer 56 and electromagnetism Ferrum 57 is between dividing plate 55.Described electric magnet 57 connects and can promote electric shock hammer 56, makes electric shock Hammer 56 percussion aluminium ring shape pipeline 52 inwall.Described ECU10 is electrically connected with and controls forward solenoid 52, reverse solenoid 53 and electric magnet 57.

The design principle of the homopolarity adjacent type absorbing ring of described charged hammer is as follows: have many inside absorbing ring The energization solenoid of individual ribbon core, adjacent solenoid coil is connected with electric current in opposite direction so that just Like pole is produced to solenoid and reverse solenoid adjacent.Meanwhile, forward solenoid and reverse spiral shell Set at the absorbing ring inwall of spool adjacent and forward solenoid and reverse solenoid axis intermediate point Having irony magnetic conduction cap, parallel with absorbing ring axis in strip, the shell of absorbing ring is outside paramagnetism aluminum matter Tube wall, this set is conducive to improving magnetic circuit, strengthens the magnetic field intensity at absorbing ring inwall, and it is right to strengthen The capture absorbability of granule.Each solenoid current is directly controlled by ECU, can be according to the particle diameter of granule Size is different with concentration and changes, to obtain optimal adsorption performance.Be additionally provided with between adjoining solenoids by The electric hammer of magnet control, two ends are isolated by dividing plate and solenoid magnet.What this electric shock was hammered into shape arranges use In preventing granule bulk deposition at irony magnetic conduction cap, affect adsorption effect.Now, electric magnet is passed through Control electric hammer and tap the inwall of absorbing ring so that adsorbed granule scatter to both sides.Meanwhile, exist When cleaning absorbing ring, the percussion of electric shock hammer can also improve cleaning performance.After having adsorbed, by electricity Magnet controls electric hammer and taps the inwall of absorbing ring so that adsorbed granule scatter to both sides, subsequently ECU controls electric magnet power-off, and paramagnetism aluminum matter pipeline loses magnetism, and is attached to magnetic on inner-walls of duct Polymeric macroparticle enters adjacent capacitor particulate matter monitoring module with fluid along tube wall.

Refer to Figure of description 18-1 to shown in accompanying drawing 18-4, described adjacent capacitor particulate matter monitoring mould Wear particle situation in block 6 on-line monitoring fluid pressure line.Described adjacent capacitor particulate matter monitoring module 6 by Lucite inwall 61, ground shield 62, reception pole plate 63, excitation pole plate 64 and outer wall Several parts compositions such as 65.Wherein, described machine glass inner wall 61, ground shield 62 and outer wall 65 In tubular construction, and successively from-inner-to-outer is arranged.

The thickness of described machine glass inner wall 61 is 0.5mm, and dielectric constant is the 2.5 (dielectrics of hydraulic oil Constant about about 2.1), and the dielectric constant of hydraulic oil is close, therefore edge capacitance is fixed value；When When lucite inner wall surface piles with magnetization polymeric macroparticle, magnetize polymeric macroparticle, hydraulic oil and have Machine glass inner wall forms mixed dielectric, jointly acts on sensors edges electric capacity, big of magnetization polymerization The dielectric constant of grain is typically larger than 10, is the several times of the dielectric constant of hydraulic oil and lucite inwall, Enough cause the significant change of capacitance sensor edge capacitance, therefore may utilize adjacent capacitive sensors electricity The change of capacitance, thus the anti-minor variations pushing away fluid dielectric constant, and then realize wear particle Implement monitoring.

Adjacent capacitive sensors performance based on electric capacity edge effect depends primarily on penetration depth (electric field The penetration depth of line), signal intensity (size of capacitance) and noise suppressed, measurement sensitivity is (to electricity Buckling or the sensitivity of electric field change) and the measurement dynamic range of sensor.Existing adjacent capacitor passes The capacitance that sensor measurement obtains is the faintest, and usually pF level is the least, low to metal particle etc. The measurement effect of the medium of dielectric constant is the most worse, therefore promotes sensor output signal strength and particularly closes Key.Meanwhile, signal intensity and penetration depth two indices are conflicting, and this is also this sensor Performance boost difficult point.

Adjacent capacitive sensors signal intensity and sensor plate area, polar plate spacing, and sensor And the distance between object under test, the dielectric constant of determinand suffers from the biggest relation.Be polymerized through magnetization, Centrifugal and adsorption treatment wear particle is assembled in lucite inner wall surface, and the increase of amounts of particles is led Causing the increase of fluid dielectric constant, the particle diameter increase that aggregation of particles brings also makes fluid dielectric constant Increasing, magnetize simultaneously and also have the function increasing dielectric constant, three acts on simultaneously, has been greatly reinforced letter Number intensity；And owing to granule is close to organic glass inner wall surface, penetration depth is required almost nil, Also index collision problem is solved.

Owing to adjacent capacitive sensors output signal strength is the faintest, the noise impact on measurement result Significantly.Generally noise is mainly derived from two aspects, the noise of sensor self and environment noise.For this Devising ground shield to reduce sensor self-noise, the dielectric constant of ground shield 62 is 1.5-2.5, shielding thickness is preferred between being 1 to 2 times of adjacent capacitive sensors outer wall 65 thickness, To ensure to measure sensitivity.

Described reception pole plate 63, excitation pole plate 64 are embedded in ground shield 62, and are positioned at machine glass Outside glass inwall 61, form gap magnetic field 66 between the two, be used for detecting aggregated particles 67.Described Receive pole plate 63, excitation pole plate 64 all uses efficient frontier length and baroque Peano curve knot Structure pole plate layer.In this Peano curve structure pole plate layer, excitation pole plate 63, reception pole plate 64 form Curve can travel through square pole plate layer in all of point, obtain one be full of whole square pole plate layer The curve in space.In the case of pole plate aspect is long-pending fixing, this structure has the longest efficient frontier, Big polar plate area and labyrinth, add effective polar plate area and pole plate edge, add sensing Device edge capacitance value, reduces the requirement to external interface circuit sensitivity.Thus can obtain optimal letter Number intensity, sensor excitation pole plate uses curved edge to it also avoid pole plate corner with receiving pole plate High sensitivity and unstability.Further, described reception pole plate 63, excitation both pole plates 64 it Between be provided with sealing coat 69；0.8-1 times that width is lucite inner wall thickness of described sealing coat 69, It effectively can will receive pole plate 63, encourage pole plate 64 to isolate.

One end of described demagnetization module 7 is provided with fluid outlet 92, and it is by remanent magnetism sensor and demagnetizer group Become.Due to the existence of hysteresis, after ferromagnetic material is magnetized into saturation, even if cancelling additional Magnetic field, the magnetic induction in material still returns less than zero point, needs externally-applied magnetic field demagnetization.In order to prevent Magnetic microparticles enters hydraulic circuit, and sensitive to pollution Hydraulic Elements cause damage, described demagnetization module 7 Detected value according to demagnetizer exit remanent magnetism sensor controls the demagnetization intensity of demagnetizer.Use herein Demagnetization method be electromagnetism demagnetization, method is the opposing magnetic field by add suitable so that in material Magnetic induction comes back to zero point, and magnetic field intensity or electric current must invert in order and progressively drop Low.

Referring to shown in Figure of description 19, described wear particle on-Line Monitor Device farther includes Described ECU10, the PIC16F877 of its optional Microchip company.Described wave filter 8, surplus Magnetic Sensor, demagnetizer, heater, cooler, temperature sensor, magnetizing current output module 25, Mechanical centrifugal module 3, rotating excitation field are centrifuged module 4, adsorption module 5, adjacent capacitor particulate matter monitoring mould Block 6 is all electrically connected on ECU, and by ECU control.

In using above-mentioned wear particle on-Line Monitor Device that hydraulic pressure is had wear particle monitoring include as Lower method:

1), the fluid in fluid pressure line carries wear particle and passes through wave filter 8, is declined by wave filter 8 Subtract the fluctuation pressure of high, medium and low frequency range in hydraulic system, and suppression flowed fluctuation；

2), oil liquid temperature is controlled by temperature control module constant at 42 DEG C；

3), magnetized module 2 is force-magnetized by the wear particle that carries in fluid, makes micron-sized mill Damage particle aggregation and become bulky grain

4), magnetization aggregated particles initial centrifugation in mechanical centrifugal module 3；

5), rotating excitation field module 4 carries out secondary centrifuging to magnetization aggregated particles；

6), adsorption module 5 adsorbs the magnetization being gathered in near-wall after rotated magnetic field module 4 is centrifuged It is polymerized big microgranule；

7), by wear particle situation in adjacent capacitor particulate matter monitoring module 6 on-line monitoring fluid pressure line

8), demagnetization module 7 gives magnetized particles demagnetization, prevents magnetic microparticles from entering hydraulic circuit, to dirt The sensitive Hydraulic Elements of dye cause damage.

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. one kind with filtering, the centrifugal and wear particle on-line monitoring method of adjacent capacitor, it is characterized in that: it uses a kind of monitoring device, and this equipment includes that wave filter, temperature control module, magnetized module, mechanical centrifugal module, rotating excitation field are centrifuged module, adsorption module, adjacent capacitor particulate matter monitoring module and demagnetization module；Wherein, described wave filter, temperature control module, magnetized module, mechanical centrifugal module, rotating excitation field are centrifuged module, adsorption module, adjacent capacitor particulate matter monitoring module and demagnetization module and are sequentially connected with；One end of described wave filter is provided with fluid entrance, and it includes input pipe, shell, outlet tube, S type elastic thin-wall, plug-in type H mode filter, plug-in type cascaded H mode filter and colloid damping layer；Wherein, described input pipe is connected to one end of shell；Described outlet tube is connected to the other end of shell；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, outlet tube and S type elastic thin-wall are collectively forming a S type cavity volume wave filter；Resonance series cavity volume I, resonance series cavity volume II and parallel resonance cavity volume is formed between described S type elastic thin-wall and shell；Separated by an elastic baffle between described resonance series cavity volume I and resonance series cavity volume II；Some conical damping holes are uniformly had in the axial direction of described S type elastic thin-wall；Uniformly having some tapers in the axial direction of described elastic baffle and insert pipe, 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 colloid damping layer is arranged on the inner side of S type elastic thin-wall；One end of described demagnetization module is provided with fluid outlet, and it is made up of remanent magnetism sensor and demagnetizer；

It comprises the steps:

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

2), oil liquid temperature is controlled by temperature control module constant at 42 DEG C；

3), magnetized module is force-magnetized by the wear particle that carries in fluid, makes micron-sized wear particle aggregate into bulky grain

4), magnetization aggregated particles initial centrifugation in mechanical centrifugal module；

5), rotating excitation field module carries out secondary centrifuging to magnetization aggregated particles；

6), adsorption module adsorbs the magnetization big microgranule of polymerization being gathered in near-wall after rotated magnetic field module is centrifuged；

7), by wear particle situation in adjacent capacitor particulate matter monitoring module online monitoring fluid pressure line；

8), demagnetization module is to magnetized particles demagnetization.

Filtering the most as claimed in claim 1, the centrifugal and wear particle on-line monitoring method of adjacent capacitor, it is characterised in that: the axis of described input pipe and outlet tube is the most 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 °；Described taper is inserted the position of pipe and conical damping hole and is mutually staggered；The internal layer of described colloid damping layer and outer layer are respectively outer layer S type elastic thin-wall and internal layer S type elastic thin-wall, are connected by some pillars are fixing between outer layer S type elastic thin-wall and internal layer S type elastic thin-wall；It is filled with, in interlayer between described outer layer S type elastic thin-wall and internal layer S type elastic thin-wall, the pure water adding antifreezing agent, in pure water, is suspended with Bio-sil；Described colloid damping layer is connected with shell near one end of outlet tube；Described colloid damping layer is provided with circular piston near one end of input pipe, is tightly connected between piston and colloid damping layer.

Filtering the most as claimed in claim 1, the centrifugal and wear particle on-line monitoring method of adjacent capacitor, 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.

Filtering the most as claimed in claim 1, the centrifugal and wear particle on-line monitoring method of adjacent capacitor, 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, and the size of current in positive winding and inverse winding is equal；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.

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

Filtering the most as claimed in claim 1, the centrifugal and wear particle on-line monitoring method of adjacent capacitor, it is characterised in that: described rotating excitation field is centrifuged module and includes aluminum matter pipeline, iron shell, three-phase symmetric winding, flange and three-phase symmetrical current module；Described three-phase symmetric winding is wound on outside aluminum matter pipeline；Described iron shell is coated on aluminum matter pipeline；Described flange welding is at the two ends of aluminum matter pipeline；Described three-phase symmetrical current module connects described three-phase symmetric winding.

Filtering the most as claimed in claim 6, the centrifugal and wear particle on-line monitoring method of adjacent capacitor, it is characterised in that: described adsorption module uses homopolarity adjacent type absorbing ring；Described homopolarity adjacent type absorbing ring includes aluminium ring shape pipeline, forward solenoid, reverse solenoid and irony magnetic conduction cap；Described forward solenoid and reverse solenoid are respectively arranged in aluminium ring shape pipeline, and both are connected with electric current in opposite direction so that forward solenoid and reverse solenoid adjacent produce like pole；Described irony magnetic conduction cap is arranged on the inwall of aluminium ring shape pipeline, and it is positioned at forward solenoid and reverse solenoid adjacent and forward solenoid and the intermediate point of reverse solenoid axis.

Filtering the most as claimed in claim 6, the centrifugal and wear particle on-line monitoring method of adjacent capacitor, it is characterised in that: described adsorption module uses the homopolarity adjacent type absorbing ring of charged hammer；The homopolarity adjacent type absorbing ring of described charged hammer includes aluminium ring shape pipeline, forward solenoid, reverse solenoid, irony magnetic conduction cap, dividing plate, electric shock hammer and electric magnet；Described forward solenoid and reverse solenoid are respectively arranged in aluminium ring shape pipeline, and both are connected with electric current in opposite direction so that forward solenoid and reverse solenoid adjacent produce like pole；Described irony magnetic conduction cap is arranged on the inwall of aluminium ring shape pipeline, and it is positioned at forward solenoid and reverse solenoid adjacent and forward solenoid and the intermediate point of reverse solenoid axis；Described dividing plate is between forward solenoid and reverse solenoid；Described electric shock hammer and electric magnet are between dividing plate；Described electric magnet connects and can promote electric shock hammer, makes electric shock hammer tap aluminium ring shape inner-walls of duct.

Filtering the most as claimed in claim 1, the centrifugal and wear particle on-line monitoring method of adjacent capacitor, it is characterised in that: described adjacent capacitor particulate matter monitoring module includes organic glass inner wall, ground shield, reception pole plate, excitation pole plate and outer wall；Wherein, described machine glass inner wall, ground shield and outer wall in tubular construction, and successively from-inner-to-outer arrange；The thickness of described machine glass inner wall is 0.5mm, and dielectric constant is 2.5；The dielectric constant of described ground shield is 1.5-2.5, and thickness is 1 to 2 times of outer wall thickness；Described reception pole plate, excitation pole plate are embedded in ground shield, and are positioned at outside machine glass inner wall；Described reception pole plate, excitation pole plate all use Peano curve structure pole plate layer, are provided with sealing coat between the two；The width of described sealing coat is 0.8-1 times of lucite inner wall thickness.

Filtering the most as claimed in claim 1, the centrifugal and wear particle on-line monitoring method of adjacent capacitor, it is characterized in that: it farther includes an ECU, described wave filter, remanent magnetism sensor, demagnetizer, heater, cooler, temperature sensor, magnetizing current output module, mechanical centrifugal module, rotating excitation field are centrifuged module, adsorption module and adjacent capacitor particulate matter monitoring module and are all electrically connected on ECU.