CN106018501A - Wear particle online monitoring method using filtering, centrifugation and adjacent capacitance - Google Patents
Wear particle online monitoring method using filtering, centrifugation and adjacent capacitance Download PDFInfo
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- CN106018501A CN106018501A CN201610312160.9A CN201610312160A CN106018501A CN 106018501 A CN106018501 A CN 106018501A CN 201610312160 A CN201610312160 A CN 201610312160A CN 106018501 A CN106018501 A CN 106018501A
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- G—PHYSICS
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/22—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating capacitance
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Abstract
The invention relates to a wear particle online monitoring method using filtering, centrifugation and adjacent capacitance. Wear particle 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 a variable-structure 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
[technical field]
The present invention relates to the wear particle on-line monitoring system in a kind of fluid pressure line fluid, be specifically related to a kind of filtering, centrifugation and the wear particle monitoring method of adjacent capacitor, belong to hydraulic system technical field.
[background technology]
Wear particle in hydraulic system oil liquid not only can make kinematic pair produce abrasive wear but also the relative motion of kinematic pair can be made to be obstructed and cause control component actuation malfunctioning.Statistics both domestic and external show, hydraulic machinery 70% fault is derived from the particle contamination of fluid.Therefore, the wear particle in fluid is carried out on-line monitoring and has become one of important channel reducing abrasion and hydraulic system fault.
Capacitance sensor is applied to the pollution monitoring of machine fluid because it is easy to make, with low cost.Patent documentation 1 (Chinese invention patent Authorization Notice No. CN101435788B) discloses a kind of online oil liquid monitoring sensor based on dielectric constant measurement and system thereof, the sensor of this invention includes bearing and is fixed on three poles of inside, three poles constitute differential cylindrical capacitor, the minor variations of sensor capacitance value can be monitored, thus the anti-minor variations pushing away fluid dielectric constant, and then realize the enforcement to contamination level of oil liquid and monitor.Sensor pole in this monitoring method is immersed in fluid, causes the change of fluid fluidised form, have impact on certainty of measurement；Fluid can form deposition oil film on sensor pole surface, 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)) a kind of Probe with Capacitor Sensor Used in Oil Monitoring is disclosed, this probe is made up of a cylindrical glass pipe and the two halves circular electrode being close to this pipe outer wall, and it is substantially parallel plate capacitor sensor.This capacitance sensor excitation pole plate is retrained by conduit under fluid pressure diameter with receiving polar plate spacing, and owing to conduit under fluid pressure diameter is relatively large, 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, Monitoring Data can be caused to fluctuate widely and cause monitoring unsuccessfully.
Therefore, for solving above-mentioned technical problem, use filtering, centrifugation and the wear particle monitoring method of adjacent capacitor of a kind of innovation of necessary offer, to overcome described defect of the prior art.
[summary of the invention]
For solving above-mentioned technical problem, it is an object of the invention to provide a kind of filtering, centrifugation and the wear particle monitoring method of adjacent capacitor, its use non-invasive metering system, to measured without restrictive, 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: a kind of filtering, centrifugation and the wear particle monitoring method of adjacent capacitor, it uses a kind of monitoring system, and this system 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, elastic thin-wall, H mode filter and cascaded H mode filter；Wherein, described input pipe is connected to one end of shell；Described outlet tube is connected to the other end of shell；Described elastic thin-wall is installed in shell along the radial direction of shell；Described input pipe, outlet tube and elastic thin-wall are collectively forming a c-type cavity volume wave filter；Some taper structure changes damping holes are uniformly had in the axial direction of described elastic thin-wall；Described taper structure changes damping hole is 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 elastic thin-wall and shell；The outside of described resonance series cavity volume I sets a resonance series cavity volume II, inserts pipe by the taper of some uniform arrangements 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；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.
The wear particle monitoring method by filtering, centrifugation and adjacent capacitor of the present invention is further: the axis of described input pipe and outlet tube is the most on the same axis；The wider place of described taper structure changes damping hole opening is positioned at resonance series 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 °；Described taper is inserted the position of pipe and taper structure changes damping hole and is mutually staggered.
The wear particle monitoring method by filtering, centrifugation and adjacent capacitor of the present invention is further: 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.
The wear particle monitoring method by filtering, centrifugation and adjacent capacitor of the present invention is further: described magnetized module includes aluminum matter pipeline, some windings, iron shell, flange and some magnetizing current output modules；Wherein, described some windings are rotating around outside aluminum matter pipeline, and each winding is made up of positive winding and inverse winding, 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.
The wear particle monitoring method by filtering, centrifugation and adjacent capacitor of the present invention is further: 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.
The wear particle monitoring method by filtering, centrifugation and adjacent capacitor of the present invention is further: described rotating excitation field is centrifuged module and includes aluminum matter pipeline, iron shell, three-phase symmetric winding, flange and three-phase symmetrical current module；Described three-phase symmetric winding is wound on outside aluminum matter pipeline；Described iron shell is coated on aluminum matter pipeline；Described flange welding is at the two ends of aluminum matter pipeline；Described three-phase symmetrical current module connects described three-phase symmetric winding.
The wear particle monitoring method by filtering, centrifugation and adjacent capacitor of the present invention is further: 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.
The wear particle monitoring method by filtering, centrifugation and adjacent capacitor of the present invention is further: 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.
The wear particle monitoring method by filtering, centrifugation and adjacent capacitor of the present invention is further: 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.
The wear particle monitoring method by filtering, centrifugation and adjacent capacitor of the present invention is also: it includes that 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.
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, to produce the non-uniform magnetic-field that magnetization needs, make the wear particle in fluid force-magnetized and aggregate into bulky grain, making colloidal particles decompose simultaneously and melt and suppress air bubble growth；Mechanically and magnetically field be centrifuged module make magnetic microparticles " separate " and to cavity wall move；Polymeric macroparticle is magnetized by adsorption module capture duct wall surface.
2. in fluid pressure line wear particle monitoring device, introduce adjacent capacitive sensors based on electric capacity edge effect, by wear particle magnetizing, aggregates into bulky grain and centrifugal being adsorbed onto tube wall to improve granule density, increase the dielectric constant of tube wall surface fluid, greatly improve sensor output signal strength 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, the curve of excitation pole plate, reception pole plate and isolation pole plate composition can travel through all of point in square pole plate layer, obtains a curve being full of whole square pole plate sheaf space.In the case of pole plate aspect is long-pending fixing, this structure has the longest efficient frontier, maximum polar plate area and labyrinth, obtains 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. the fluid pressure line wear particle monitoring technology route 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 combine, both ensure that monitoring reliability, the overall performance simultaneously making again monitoring system is optimum.
[accompanying drawing explanation]
Fig. 1 is the structural representation by the wear particle monitoring system of filtering, centrifugation and adjacent capacitor of the present invention.
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 c-type cavity volume wave filter.
Fig. 9 is the cross sectional representation of elastic thin-wall.
Figure 10 is the schematic diagram of taper structure changes damping hole in Fig. 2.
Figure 10 (a) to Figure 10 (c) is the working state figure of taper structure changes damping hole.
Figure 11 is the 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 the structural representation of the homopolarity adjacent type absorbing ring of charged hammer.
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 is the wear particle monitoring system of a kind of filtering, centrifugation and adjacent capacitor, and it is centrifuged several parts such as module 4, adsorption module 5, adjacent capacitor particulate matter monitoring module 6, demagnetization module 7 and ECU10 is formed by wave filter 8, temperature control module 1, magnetized module 2, mechanical centrifugal module 3, rotating excitation field.Wherein, described wave filter 8, temperature control module 1, magnetized module 2, mechanical centrifugal module 3, rotating excitation field are centrifuged module 4, adsorption module 5, adjacent capacitor particulate matter monitoring module 6 and demagnetization module 7 and 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 the fluctuation pressure of the high, medium and low frequency range that can decay in hydraulic system, and suppression flowed fluctuation, it is ensured that monitoring result is accurate.Described wave filter 8 is made up of several parts such as input pipe 81, shell 88, outlet tube 89, elastic thin-wall 87, H mode filter 812 and cascaded H mode filters 813.
Wherein, described input pipe 81 is connected to one end of shell 88；Described outlet tube 89 is connected to the other end of shell 88.Described elastic thin-wall 87 is installed in shell 88 along the radial direction of shell.The axis of described input pipe 81 and outlet tube 89 the most on the same axis, so can improve the filter effect of more than 10%.
Described input pipe 81, outlet tube 89 and elastic thin-wall 87 are collectively forming a c-type cavity volume wave filter, thus hydraulic system high frequency pressure pulsations of decaying.The filter transmission coefficient obtained after processing by lumped-parameter method is:
Velocity of sound L in a mediumVC-type cavity volume length SVC-type cavity volume volume Z characteristic impedance
γ transmission coefficient f pressure oscillation frequency SIInput pipe cross-sectional area.
From above formula, c-type wave filter is similar with the electric capacity effect in circuit.When the pressure pulse wave of different frequency is by this wave filter, transmission coefficient is different with frequency.Frequency is 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 serves the effect eliminating high frequency pressure pulsations.
The design principle of described c-type cavity volume wave filter is as follows: when in pipeline, the fluctuating frequency of pressure is higher, and the pressure of fluctuation acts on convection cell on fluid and produces pinch effect.When the flow of change enters c-type cavity volume by input pipe, liquid stream exceedes average discharge, and the cavity volume of expansion can absorb unnecessary liquid stream, and releases liquid stream when less than average discharge, thus absorption pressure pulsation energy.
Described elastic thin-wall 87 weakens hydraulic system medium-high frequency pressure fluctuation by being forced to mechanical vibration.The elastic thin-wall natural frequency obtained after processing by lumped-parameter method is:
K elastic thin-walled structures coefficient h elastic thin-wall thickness R elastic thin-wall radius
The mass density of the Young's modulus ρ elastic thin-wall of E elastic thin-wall
The Poisson's ratio of the current-carrying factor mu elastic thin-wall of η elastic thin-wall.
Substitute into actual parameter, above formula is carried out simulation analysis it is found that the natural frequency of elastic thin-wall 87 is generally high than the natural frequency of H mode filter, and its attenuation band is also wide than H mode filter.In relatively wide frequency band range, elastic thin-wall has good attenuating to pressure fluctuation.Meanwhile, the elastic thin-wall radius in the filter construction of the present invention is bigger and relatively thin, and its natural frequency, closer to Mid Frequency, can realize the effective attenuation to the medium-high frequency pressure fluctuation in hydraulic system.
The design principle of described elastic thin-wall 87 is as follows: when producing intermediate frequency pressure fluctuation in pipeline, c-type cavity volume is more weak to the damping capacity of pressure oscillation, flows into the periodically pulsing pressure continuous action of wave filter c-type cavity volume on elastic thin-wall 87.Elastic thin-wall then does periodic vibration by the frequency of fluctuation pressure, and this forced vibration consumes the pressure fluctuation energy of fluid, thus realizes the filtering of Mid Frequency pressure.From the principle of virtual work, the ability that elastic thin-wall consumes fluid pulsation pressure energy is directly related with potential energy during its forced vibration and kinetic energy sum, in order to improve Mid Frequency filtering performance, the radial design of elastic thin-wall is much larger than pipe radius, and the thickness of thin-walled is less, representative value is less than 0.1mm.
Further, resonance series cavity volume I84 and parallel resonance cavity volume 85 are formed between described elastic thin-wall 87 and shell 88.The outside of described resonance series cavity volume I84 sets a resonance series cavity volume II83, insert pipe 82 by the taper of some uniform arrangements between described resonance series cavity volume I84 and resonance series cavity volume II83 to connect, described taper is inserted the wider place of pipe 82 opening and is positioned at resonance series cavity volume II83, and its taper angle is 10 °.Uniformly having some taper structure changes damping holes 86 in the axial direction of described elastic thin-wall 87, mutually staggers in the position of taper structure changes damping hole 86 and taper insertion pipe 82.
Described H mode filter 812 is positioned at parallel resonance cavity volume 85, and it is connected with taper structure changes damping hole 86.The wider place of described taper structure changes damping hole 86 opening is positioned at resonance series cavity volume I84 and parallel resonance cavity volume 85, and its taper angle is 10 °.The wave filter natural angular frequency obtained after processing by lumped-parameter method is:
Velocity of sound L in a medium1The long D of damping hole1Damping hole diameter
L2Parallel resonance cavity volume height D2Parallel resonance cavity volume diameter.
Described cascaded H mode filter 813 is positioned at resonance series cavity volume I84 and resonance series cavity volume II83, and it is also connected with taper structure changes damping hole 86.After processing by lumped-parameter method, two natural angular frequencies of cascaded H mode filter 813 are:
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), separate with dividing plate 20 each other, the resonance bands of these multiple wave filter is different, whole medium and low frequency filtering frequency range can be covered, it is achieved the entire spectrum filtering of medium and low frequency section after combining comprehensively.
All can be found by Fig. 6 H mode filter and cascaded H mode filter frequency characteristic and formula, cascaded H mode filter has 2 natural angular frequencies, and at crest, filter effect is preferable, does not the most substantially have filter effect at trough；H mode filter has 1 natural angular frequency, and at crest, filter effect is preferable equally, does not the most substantially have filter effect at trough；Select suitable filter parameter, the natural angular frequency making H mode filter just falls between 2 natural angular frequencies of cascaded H mode filter, as shown in Figure 7, both in certain frequency range, defined the natural reonant frequency peak value of 3 next-door neighbours, in this frequency range, no matter the fluctuating frequency of pressure is at crest or all can guarantee that preferable filter effect at trough.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 made up of cone shaped elastic damping hole pipe 16 and slot apertures 15, and taper narrow end is opened on elastic thin-wall 87.Wherein the Young's modulus of cone shaped elastic damping hole pipe 16 is bigger than the Young's modulus of elastic thin-wall 87, can be with change in fluid pressure stretching or compression；The Young's modulus of slot apertures 15 is bigger than the Young's modulus of cone shaped elastic damping hole pipe 16, can be with fluid opened by pressure or closedown.Therefore when the fluctuating frequency of pressure falls at high band, c-type cavity volume filter construction strobes, cone shaped elastic damping hole pipe 16 and slot apertures 15 are all in Figure 10 (a) state；And when ripple frequency falls at Mid Frequency, filter construction becomes c-type cavity volume filter construction and elastic thin-wall 87 filter structure concurs, 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 connection in series-parallel H mode filter, c-type cavity volume filter construction and elastic thin-wall filter structure and concurs, cone shaped elastic damping hole pipe 16 and slot apertures 15 are all in Figure 10 (b) state, owing to the natural frequency of plug-in type connection in series-parallel H mode filter is designed to consistent with these particular low frequency ripple frequencies, the system that fundamental frequency energy is big can be played preferable filter effect；When ripple frequency falls the low-frequency range beyond some characteristic frequency, cone shaped elastic damping hole pipe 16 and slot apertures 15 are all in Figure 10 (c) state.The design of such structure changes wave filter both ensure that the full frequency band full working scope filtering of hydraulic system, reduces again 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, the characteristic impedance of pipe-line system can be caused to undergo mutation, so that former pipeline pressure curve with change in location in time changes the most therewith, then the position of pressure peak also changes.Owing to the axial length of the wave filter of the present invention is designed as more than system main pressure pulsation wavelength, and the cavity volume length of connection in series-parallel H mode filter group, the length of c-type cavity volume wave filter and the length of elastic thin-wall of wave filter and wave filter axial length equal, it is ensured that pressure peak position is constantly in the effective range of wave filter；And the taper structure changes damping hole of connection in series-parallel H mode filter is opened on elastic thin-wall, it is uniformly distributed in the axial direction, resonance cavity volume 1 is connected by the taper resonantron of multiple axial equally distributed identical parameters with resonance cavity volume 2, mutually stagger in conical damping hole and taper resonantron position, the performance of wave filter is had little to no effect by pressure peak change in location, 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 also ensure that hydraulic filter possesses stronger pressure fluctuation damping capacity.
The method that the hydraulic filter using the present invention carries out hydraulic pulsation filtering is as follows:
1), hydraulic fluid enters c-type cavity volume wave filter by input pipe, and the cavity volume of expansion absorbs unnecessary liquid stream, completes the filtering of high frequency pressure pulsations；
2), by elastic thin-wall 87 forced vibration, consume the pressure fluctuation energy of fluid, complete the filtering of intermediate frequency pressure fluctuation；
3), by connection in series-parallel H mode filter group, and taper structure changes damping hole, taper insertion pipe and fluid produce resonance, consume energy of pulsing, 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, c-type cavity volume filter length and elastic thin-wall 87 length are equal with filter length, pressure peak position is made to be constantly in the effective range of wave filter, it is achieved the filtering of pressure fluctuation when system condition changes；
5), by the flexible of the cone shaped elastic damping hole pipe of taper structure changes damping hole and the switch of slot apertures, pressure fluctuation adaptive-filtering is completed.
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 topmost environment noise, and different temperature can cause the fluid dielectric constant in fluid pressure line that notable change occurs, and keeps 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 heater of the Chongqing gold letter of band temperature detection own.Cooler can be selected for remover for surface evaporation type air cooling, the advantage having water-cooled and air cooling concurrently, good heat dissipation effect, uses light pipe, and fluid resistance is little；Cooler fin type is high wing, and finned tube selects KLM type finned tube, good heat-transfer, and thermal contact resistance is little, and fin and pipe contact area are big, and closely, firmly, it is good to bear cold and hot sudden turn of events ability, and fin root weather-resistant performance is high in laminating；The bank of tubes number optimum of air cooler is 8.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-sized 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, and large-sized iron granules translational speed is more faster than undersized iron granules, wear particle is aggregated into bulky grain and also allows for later separation.
The dielectric constant of the colloidal particles carried in fluid and the dielectric constant of bubble and hydraulic oil and wear particle is different from, impact in order to avoid adjacent capacitive sensors below is monitored, need to design non-uniform magnetic-field and decompose or remove colloidal particles and bubble.
Molecular alignment is made to discuss according to magnetic field, when fluid flows through magnetic field, magnetic field produces certain impact to the athletic meeting of the colloidal particles in fluid so that colloidal particles makees olderly flowage in pipeline, decrease being connected with each other of colloidal particles, thus play the viscosity reduction effect separating colloidal particles.Meanwhile, there is cohesiveness between magnetized granule, this power limits the formation of bubble and grows up.During bubble-free, the magnetic line of force in fluid is evenly distributed, and is in the steady state of magnetic.When there being bubble in fluid, the magnetic line of force of bubble local occurs curved had, by, the magnetic line of force of bending, the most uniform, parallel, the trend of steady statue that reverts to, thus produces the magnetic tension pointing to bubble center, and 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 near a certain 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, representative value be magnetic field intensity at about 200mT, temperature about 42 DEG C.The impact that during design non-uniform magnetic-field, the edge effect in magnetic field to be considered is caused, one end that magnetic induction should be designed as flowing at fluid is stronger, and it is more weak in one end that fluid flows out, meet fluid outflow end, reduce magnetic field, alleviate the requirement that edge effect affects, ensure the magnetic efficiency flowing into end at fluid simultaneously.
The magnetizing assembly of the present invention is made up of aluminum matter pipeline 21, some windings 22, iron shell 23, flange 24 and some magnetizing current output modules 25.Wherein, described aluminum matter pipeline 21 makes fluid flow there through and by magnetization treatment, and the pcrmeability of aluminum is the lowest, can make to obtain in pipeline 21 higher magnetic field intensity.
Described some windings 22, rotating around outside aluminum matter pipeline 21, are coated insullac by the copper wire of a diameter of about 1.0mm and make.Each winding 22 is all separate setting, is controlled by corresponding magnetizing current output module 25 respectively, and wherein electric current needs different according to system.Separate owing to often enclosing winding 22, the electric current loop that its exit can cause this coil to form is not real " justifying ", but has individual breach, and 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 made up of positive winding 26 and inverse winding 27 in order to produce the magnetic field in same polarity direction and to make up the magnetic field that breach causes unbalanced simultaneously.Size of current in positive winding and inverse winding is equal.Aluminum matter pipeline 21 axis direction is arranged with multipair forward and reverse winding, by different electric currents, in order to form the non-uniform magnetic-field of aforementioned claim.
Described iron shell 23 is coated on aluminum matter pipeline 21, and the material of irony can mask most 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, it utilizes digital potentiometer to have and ECU10 real-time communication the feature of real time modifying resistance, it is achieved the real-time control of non-uniform magnetic-field.Described magnetizing current output module 25 use digital potentiometer be AD5206, there is the output of 6 passages, can and ECU between realize single bus data transmission.ECU realizes the current settings of polylith magnetizing current output module to magnetization winding and constant output by monobus.Amplifier AD8601 and metal-oxide-semiconductor 2N7002 achieve high-precision voltage follow by negative feedback and export.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 cavity wall, and the bubble in fluid is then shifted at the central axis of pipeline under centrifugal action, and it selects eddy flow to be centrifuged module 3.
Described eddy flow is centrifuged module 3 and uses the mode of energy loss, its design principle is as follows: arrange the flow deflector of the distortion of certain altitude and length in the duct, and make blade face tangent line angled with axis, fluid can be made to produce spiral flow in pipes because pipe flow border changes, this spiral flow can be analyzed to the circumferential flow around pipe axle and axial straight flowing, and the particulate matter carried in fluid produces off-axis alignment heart screw.This eddy flow is centrifuged module 3 and is made up of several parts such as eddy flow tube wall the 31, first flow deflector the 32, second flow deflector 33, motor 34 and flow transducers 35, and described motor 34 and flow transducer 35 are electrically connected to ECU10.
Wherein, described first flow deflector 32 is provided with 3, and these 3 first flow deflectors 32 are uniformly distributed along tube wall 31 inner periphery every 120 °, and its laying angle (angle between the first flow deflector 32 and eddy flow tube wall 31) is set to 18 °, to ensure optimal tangential flowing.Described second flow deflector 33 is identical with the first flow deflector 32 structure, after it is arranged on the first flow deflector 32, and and the first flow deflector 32 stagger 60 ° and be connected in tube wall 31, its laying angle is set to 36 DEG C, for reducing resistance and strengthening the intensity of circumferential flow.It addition, the 3rd or more flow deflector can be arranged 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 flow deflector 33, to regulate laying angle, thus can obtain more preferable centrifugal effect, knows and makes flow deflector 32,33 adapt to different operating modes.Described flow transducer 35 is arranged on the central authorities in tube wall 31, the ECU10 numerical analysis cyclonic separation effect by reading flow quantity sensor 35, and controlling motor 34 accordingly, 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 extends along the axis of tube wall 31；For reducing resistance, its leading edge frustrates into obtuse；For avoiding streaming, trailing edge is processed into wing；Its height is 0.4 times of tube wall 31 diameter, makes the spiral flow of formation have bigger intensity；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 is made up of aluminum matter pipeline 41, iron shell 42, three-phase symmetric winding 43, flange 44 and three-phase symmetrical current module 45.Described three-phase symmetric winding 43 is wound on outside aluminum matter 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: owing to the absolute mass of polymeric macroparticle is less, 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, needs to carry out secondary centrifuging.After magnetization polymeric macroparticle enters described rotating magnetic field device 4 with fluid, flowing through three-phase symmetrical electric current in three-phase symmetric winding 43, this electric current produces rotating excitation field in aluminum matter pipeline 41.Magnetized particles is acted on by magnetic field force under rotating excitation field effect, and the most spirally advances, simultaneously to aluminum matter pipeline 41 vessel wall motion.Reasonable adjusting 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 polymerized big microgranule for adsorbing the magnetization being gathered in near-wall after rotated magnetic field device 4 is centrifuged.When described adsorption module 5 uses homopolarity adjacent type absorbing ring, this homopolarity adjacent type absorbing ring is made up of parts such as aluminium ring shape pipeline 51, forward solenoid 52, reverse solenoid 53 and irony magnetic conduction caps 54.Wherein, described forward solenoid 52 and reverse solenoid 53 are respectively arranged in aluminium ring shape pipeline 51 and by ECU10 control, and both are connected with electric current in opposite direction so that forward solenoid 52 and reverse solenoid 53 adjacent produce like pole.Described irony magnetic conduction cap 54 is arranged on the inwall of aluminium ring shape pipeline 51, and it is positioned at forward solenoid 52 and reverse solenoid 53 adjacent 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 the energization solenoid of multiple ribbon core, adjacent solenoid coil to be connected with electric current in opposite direction inside absorbing ring so that forward solenoid and reverse solenoid adjacent produce like pole.Simultaneously, irony magnetic conduction cap it is provided with at the absorbing ring inwall of forward solenoid and reverse solenoid adjacent and forward solenoid and reverse solenoid axis intermediate point, parallel with absorbing ring axis in strip, the shell of absorbing ring is paramagnetism aluminum matter outer tube wall, this set is conducive to improving magnetic circuit, strengthen the magnetic field intensity at absorbing ring inwall, strengthen the capture absorbability to granule.Each solenoid current is directly controlled by ECU, can be different with concentration and change, to obtain optimal adsorption performance according to the size of granule.After having adsorbed, ECU controls electric magnet power-off, and paramagnetism aluminum matter pipeline loses magnetism, and is attached to magnetic polymeric bulky grain on inner-walls of duct and enters adjacent capacitor particulate matter monitoring module with fluid along tube wall.
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 made up of parts such as aluminium ring shape pipeline 51, forward solenoid 52, reverse solenoid 53, irony magnetic conduction cap 54, dividing plate 55, electric shock hammer 56 and electric magnet 57.Wherein, described forward solenoid 52 and reverse solenoid 53 are respectively arranged in aluminium ring shape pipeline 51 and by ECU10 control, and both are connected with electric current in opposite direction so that forward solenoid 52 and reverse solenoid 53 adjacent produce like pole.Described irony magnetic conduction cap 54 is arranged on the inwall of aluminium ring shape pipeline 51, and it is positioned at forward solenoid 52 and reverse solenoid 53 adjacent and forward solenoid 52 and the intermediate point of reverse solenoid 53 axis.Described electric shock hammer 56 and electric magnet 57 are 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 the energization solenoid of multiple ribbon core inside absorbing ring, adjacent solenoid coil is connected with electric current in opposite direction so that forward solenoid and reverse solenoid adjacent produce like pole.Simultaneously, irony magnetic conduction cap it is provided with at the absorbing ring inwall of forward solenoid and reverse solenoid adjacent and forward solenoid and reverse solenoid axis intermediate point, parallel with absorbing ring axis in strip, the shell of absorbing ring is paramagnetism aluminum matter outer tube wall, this set is conducive to improving magnetic circuit, strengthen the magnetic field intensity at absorbing ring inwall, strengthen the capture absorbability to granule.Each solenoid current is directly controlled by ECU, can be different with concentration and change, to obtain optimal adsorption performance according to the size of granule.Being additionally provided with by the electric hammer of magnet control between adjoining solenoids, two ends are isolated by dividing plate and solenoid magnet.What this electric shock was hammered into shape is provided for preventing granule bulk deposition at irony magnetic conduction cap, affects adsorption effect.Now, the inwall of absorbing ring is tapped by magnet control electric hammer so that adsorbed granule scatter to both sides.Meanwhile, when cleaning absorbing ring, the percussion of electric shock hammer can also improve cleaning performance.After having adsorbed, the inwall of absorbing ring is tapped by magnet control electric hammer, the granule being adsorbed is scatter to both sides, ECU controls electric magnet power-off subsequently, paramagnetism aluminum matter pipeline loses magnetism, and is attached to magnetic polymeric bulky grain on inner-walls of duct and 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, wear particle situation in described adjacent capacitor particulate matter monitoring module 6 on-line monitoring fluid pressure line.Described adjacent capacitor particulate matter monitoring module 6 is made up of lucite inwall 61, ground shield 62, reception pole plate 63, excitation several parts such as pole plate 64 and outer wall 65.Wherein, described machine glass inner wall 61, ground shield 62 and outer wall 65 in tubular construction, and successively from-inner-to-outer arrange.
The thickness of described machine glass inner wall 61 is 0.5mm, and dielectric constant is 2.5 (dielectric constants of hydraulic oil about about 2.1), and the dielectric constant of hydraulic oil is close, and therefore edge capacitance is fixed value；When lucite inner wall surface piles with magnetization polymeric macroparticle, magnetization polymeric macroparticle, hydraulic oil form mixed dielectric with lucite inwall, sensors edges electric capacity is acted on jointly, the dielectric constant of magnetization polymeric macroparticle is typically larger than 10, it 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 the change of adjacent capacitive sensors capacitance, thus the anti-minor variations pushing away fluid dielectric constant, and then realize the enforcement to wear particle and monitor.
Adjacent capacitive sensors performance based on electric capacity edge effect depends primarily on penetration depth (penetration depth of electric field line), signal intensity (size of capacitance) and noise suppressed, measurement sensitivity (to change in voltage or the sensitivity of electric field change) and the measurement dynamic range of sensor.The capacitance that existing adjacent capacitive sensors measurement obtains is the faintest, and usually pF level is the least, the most worse to the measurement effect of the medium of the low-ks such as metal particle, therefore promotes sensor output signal strength particularly critical.Meanwhile, signal intensity and penetration depth two indices are conflicting, and this is also that this sensor performance promotes difficult point.
Adjacent capacitive sensors signal intensity and sensor plate area, the distance between polar plate spacing, and sensor and object under test, the dielectric constant of determinand suffers from the biggest relation.Assemble in lucite inner wall surface through magnetization polymerization, centrifugal and adsorption treatment wear particle, the increase of amounts of particles causes the increase of fluid dielectric constant, the particle diameter that aggregation of particles brings increases the increase also making fluid dielectric constant, magnetize simultaneously and also have the function increasing dielectric constant, three acts on simultaneously, has been greatly reinforced signal intensity；And owing to granule is close to organic glass inner wall surface, penetration depth is required almost nil, also solves index collision problem.
Owing to adjacent capacitive sensors output signal strength is the faintest, noise is notable on the impact of measurement result.Generally noise is mainly derived from two aspects, the noise of sensor self and environment noise.Devising ground shield for this to reduce sensor self-noise, the dielectric constant of ground shield 62 is 1.5-2.5, and shielding thickness is preferred, to ensure to measure sensitivity between being 1 to 2 times of adjacent capacitive sensors outer wall 65 thickness.
Described reception pole plate 63, excitation pole plate 64 are embedded in ground shield 62, and are positioned at outside machine glass inner wall 61, form gap magnetic field 66 between the two, are used for detecting aggregated particles 67.Described reception pole plate 63, excitation pole plate 64 all use efficient frontier length and baroque Peano curve structure pole plate layer.In this Peano curve structure pole plate layer, excitation pole plate 63, the curve of reception pole plate 64 composition can travel through all of point in square pole plate layer, obtain a curve being full of whole square pole plate sheaf space.In the case of pole plate aspect is long-pending fixing, this structure has the longest efficient frontier, maximum polar plate area and labyrinth, adds effective polar plate area and pole plate edge, adds sensors edges capacitance, reduce the requirement to external interface circuit sensitivity.Thus can obtain optimum signal intensity, sensor excitation pole plate uses curved edge to it also avoid high sensitivity and the unstability of pole plate corner with receiving pole plate.Further, described reception pole plate 63, excitation pole plate 64 are provided with sealing coat 69 between the two；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 made up of remanent magnetism sensor and demagnetizer.Due to the existence of hysteresis, after ferromagnetic material is magnetized into saturation, even if cancelling externally-applied 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 from entering hydraulic circuit, sensitive to pollution Hydraulic Elements cause damage, and described demagnetization module 7 controls the demagnetization intensity of demagnetizer according to the detected value of demagnetizer exit remanent magnetism sensor.The demagnetization method herein used is electromagnetism demagnetization, and method is the opposing magnetic field by add suitable so that the magnetic induction in material comes back to zero point, and magnetic field intensity or electric current must invert in order and gradually reduce.
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, remanent magnetism 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 module 6 are all electrically connected on ECU, and by ECU control.
Wear particle in using above-mentioned wear particle on-Line Monitor Device to have hydraulic pressure is monitored and is included following method:
1), the fluid in fluid pressure line carries wear particle and passes through wave filter 8, by the fluctuation pressure of the high, medium and low frequency range that wave filter 8 is decayed 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 wear particle aggregate into 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 big microgranule of polymerization being gathered in near-wall after rotated magnetic field module 4 is centrifuged；
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, and sensitive to pollution Hydraulic Elements cause damage.
Above detailed description of the invention is only the preferred embodiment of this creation, and not in order to limit this creation, 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 by filtering, centrifugation and the wear particle monitoring method of adjacent capacitor, it is characterized in that: it uses a kind of monitoring system, and this system 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, elastic thin-wall, H mode filter and cascaded H mode filter；Wherein, described input pipe is connected to one end of shell；Described outlet tube is connected to the other end of shell；Described elastic thin-wall is installed in shell along the radial direction of shell；Described input pipe, outlet tube and elastic thin-wall are collectively forming a c-type cavity volume wave filter；Some taper structure changes damping holes are uniformly had in the axial direction of described elastic thin-wall；Described taper structure changes damping hole is 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 elastic thin-wall and shell；The outside of described resonance series cavity volume I sets a resonance series cavity volume II, inserts pipe by the taper of some uniform arrangements 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；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, centrifugation and the wear particle 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 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 °；Described taper is inserted the position of pipe and taper structure changes damping hole and is mutually staggered.
Filtering the most as claimed in claim 1, centrifugation and the wear particle 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, centrifugation and the wear particle 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, centrifugation and the wear particle 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, centrifugation and the wear particle 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, centrifugation and the wear particle 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, centrifugation and the wear particle 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, centrifugation and the wear particle 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, centrifugation and the wear particle 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.
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Application publication date: 20161012 |