CN106018216A - On-line wear particle monitoring method achieved through electrification, centrifugation, adsorption and adjacent capacitance - Google Patents

On-line wear particle monitoring method achieved through electrification, centrifugation, adsorption and adjacent capacitance Download PDF

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Publication number
CN106018216A
CN106018216A CN201610312194.8A CN201610312194A CN106018216A CN 106018216 A CN106018216 A CN 106018216A CN 201610312194 A CN201610312194 A CN 201610312194A CN 106018216 A CN106018216 A CN 106018216A
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module
electrification
centrifugal
wear particle
adjacent
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张国云
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Individual
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N15/00Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
    • G01N15/06Investigating concentration of particle suspensions
    • G01N15/0656Investigating concentration of particle suspensions using electric, e.g. electrostatic methods or magnetic methods

Abstract

The invention relates to an on-line wear particle monitoring method achieved through electrification, centrifugation, adsorption and adjacent capacitance. On-line wear particle monitoring is conducted through a temperature control module, an electrification module, an electric field centrifugation module, a mechanical centrifugation module, an adsorption module, an adjacent capacitance particle monitor module and a demagnetization module sequentially; one end of the temperature control module is provided with an oil liquid inlet; one end of the demagnetization module is provided with an oil liquid outlet, and the demagnetization module is composed of a residual magnetism sensor and a demagnetizer. According to the method, non-intrusive and unconstrained wear particle monitoring is achieved by introducing an adjacent capacitance sensor technique based on a capacitance edge effect; through the electrification module, the electric field centrifugation module and the mechanical centrifugation module, wear particles in oil liquid are aggregated into large particles and move to the positions near the tube wall to be adsorbed by the adsorption module, so that the output monitoring signal intensity of an adjacent capacitance sensor is improved; by arranging the temperature control module and reasonably designing the structure of a polar plate layer of the adjacent capacitance sensor, noise is inhibited, and the whole performance of an adjacent capacitance sensor monitoring device is optimized.

Description

With electrification, centrifugal, absorption and the 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, The wear particle being specifically related to a kind of electrification, centrifugal, absorption and adjacent capacitor is supervised online Survey method, belongs to hydraulic system technical field.
[background technology]
Wear particle in hydraulic system oil liquid not only can make kinematic pair produce abrasive wear And the relative motion of kinematic pair can be made to be obstructed and cause control component actuation malfunctioning.State Inside and outside statistics 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 minimizing abrasion and hydraulic pressure One of important channel of the system failure.
Capacitance sensor is applied to machine fluid because it is easy to make, with low cost Pollution monitoring.Patent documentation 1 (Chinese invention patent Authorization Notice No. CN101435788B) Disclose 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 prison of the enforcement to contamination level of oil liquid Survey.Sensor pole in this monitoring method is immersed in fluid, causes fluid fluidised form Change, have impact on certainty of measurement;Fluid can form deposition oil on sensor pole surface 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)) disclosing a kind of Probe with Capacitor Sensor Used in Oil Monitoring, this probe is by one Cylindrical glass pipe and the two halves circular electrode being close to this pipe outer wall form, and it is the most parallel Plate capacitance sensor.This capacitance sensor excitation pole plate and reception polar plate spacing are by hydraulic tube Road diameter constraint, owing to conduit under fluid pressure diameter is relatively large, this transducer sensitivity is inadequate Preferable.
Therefore, for solving above-mentioned technical problem, the use of a kind of innovation of necessary offer rises Electricity, centrifugal, absorption and the wear particle on-line monitoring method of adjacent capacitor, existing to overcome There is the described defect in technology.
[summary of the invention]
For solve above-mentioned technical problem, it is an object of the invention to provide one electrify, Being centrifuged, adsorb and the wear particle on-line monitoring method of adjacent capacitor, it uses non-intruding Metering system, to measured without restrictive, monitoring signal is strong and sensitivity is high and low Cost, environmental suitability are strong.
For achieving the above object, the technical scheme that the present invention takes is: with electrification, centrifugal, Absorption and the wear particle on-line monitoring method of adjacent capacitor, it uses a kind of wear particle On-line monitoring equipment, this equipment include temperature control module, electrification module, electric field be centrifuged module, Mechanical centrifugal module, adsorption module, adjacent capacitor particulate matter monitoring module and demagnetization module; Wherein, described temperature control module, electrification module, electric field be centrifuged module, mechanical centrifugal module, Adsorption module, adjacent capacitor particulate matter monitoring module and demagnetization module are sequentially connected with;Described temperature One end of control module is provided with fluid entrance;One end of described demagnetization module is provided with fluid outlet, 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 temperature control module, by temperature It is constant at 42 DEG C that control module controls oil liquid temperature;
2) fluid, being adjusted to most preferably magnetize temperature carries wear particle entrance electrification mould Block, electrification module makes the wear particle in fluid charged;
3), charged wear particle initial centrifugation in electric field is centrifuged module, make charged polymeric Granule preliminary motion is to near-wall;
4), mechanical centrifugal module carries out secondary centrifuging to charged wear particle, makes band voltolisation Close granule and move further into near-wall;
5), adsorption module absorption is gathered in near-wall after mechanical centrifugal module is centrifugal Magnetization polymer particle;Adsorption module power-off afterwards, makes the magnetic polymeric being attached on tube wall Bulky grain enters adjacent capacitor particulate matter monitoring module with fluid along tube wall;
6), micro-by adjacent capacitor particulate matter monitoring module online monitoring fluid pressure line weares and teares Granular condition;
7), demagnetization module is to magnetized particles demagnetization.
The wear particle with electrification, centrifugal, absorption and adjacent capacitor of the present invention is supervised online Survey method is further: described temperature control module includes heater, cooler and temperature sensing Device;Described heater uses the lubricating oil heater of the Chongqing gold letter of band temperature detection;Institute Stating cooler and select remover for surface evaporation type air cooling, the finned tube of cooler selects KLM type wing Sheet pipe;Temperature sensor uses platinum resistance temperature sensor.
The wear particle with electrification, centrifugal, absorption and adjacent capacitor of the present invention is supervised online Survey method is further: described electrification module includes some electrodes and an electrode controller; Described some electrodes are respectively connecting to electrode controller, and by electrode controller control.
The wear particle with electrification, centrifugal, absorption and adjacent capacitor of the present invention is supervised online Survey method is further: described electric field is centrifuged module and includes positive plate, minus plate, insulation Band and pole plate controller;Wherein, described positive plate and minus plate are in being oppositely arranged, described Insulating tape is between positive plate, minus plate, and by positive plate and minus plate electrical isolation; Described pole plate controller is electrically connected on positive plate and minus plate.
The wear particle with electrification, centrifugal, absorption and adjacent capacitor of the present invention is supervised online Survey method is further: described mechanical centrifugal module uses tangential influent stream centrifugal device, whirlpool Rotation generator centrifugal device, liquid whild-wind generator centrifugal device, elbow type pipe cyclone or Person's eddy flow is centrifuged module.
The wear particle with electrification, centrifugal, absorption and adjacent capacitor of the present invention is supervised online Survey method is further: described eddy flow be centrifuged module include eddy flow tube wall, the first flow deflector, Second flow deflector, motor and flow transducer;Wherein, described first flow deflector Being provided with 3, 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, its After being 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, minor face edge The axis of tube wall extends;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 is even Connect and drive the first flow deflector and the second flow deflector, to regulate laying angle;Described flow passes Sensor is arranged on the central authorities in tube wall.
The wear particle with electrification, centrifugal, absorption and adjacent capacitor of the present invention is supervised online Survey method is further: described adsorption module uses homopolarity adjacent type absorbing ring;Described same The most adjacent type absorbing ring include aluminium ring shape pipeline, forward solenoid, reverse solenoid with And irony magnetic conduction cap;Described forward solenoid and reverse solenoid are respectively arranged in aluminium ring In shape pipeline, both are connected with electric current in opposite direction so that forward solenoid and reverse spiral shell Spool adjacent produces like pole;Described irony magnetic conduction cap is arranged in aluminium ring shape pipeline Inwall on, it is positioned at forward solenoid and reverse solenoid adjacent and forward spiral shell Spool and the intermediate point of reverse solenoid axis.
The wear particle with electrification, centrifugal, absorption and adjacent capacitor of the present invention is supervised online Survey method is further: described adsorption module uses the homopolarity adjacent type absorption of charged hammer Ring;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, both It is connected with electric current in opposite direction so that forward solenoid and reverse solenoid adjacent produce Like pole;Described irony magnetic conduction cap is arranged on the inwall of aluminium ring shape pipeline, its position In forward solenoid and reverse solenoid adjacent and forward solenoid and reverse helical The intermediate point of pipe 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 electricity Hammer, makes electric shock hammer tap aluminium ring shape inner-walls of duct.
The wear particle with electrification, centrifugal, absorption and adjacent capacitor of the present invention is supervised online Survey method is further: described adjacent capacitor particulate matter monitoring module include organic glass inner wall, Ground shield, reception pole plate, excitation pole plate and outer wall;Wherein, described machine glass Inwall, ground shield and outer wall in tubular construction, and successively from-inner-to-outer arrange;Institute The thickness stating machine glass inner wall is 0.5mm, and dielectric constant is 2.5;Described grounded shield The dielectric constant of layer 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, both it Between be provided with sealing coat;The width of described sealing coat is the 0.8-1 of lucite inner wall thickness Times.
The wear particle with electrification, centrifugal, absorption and adjacent capacitor of the present invention is supervised online Survey method is also: it includes an ECU, described remanent magnetism sensor, demagnetizer, heater, Cooler, temperature sensor, electrification module, electric field be centrifuged module, mechanical centrifugal module, Adsorption module and adjacent capacitor particulate matter monitoring module are all electrically connected on ECU, and by ECU controls.
Compared with prior art, there is advantages that
1. present invention introduces adjacent capacitive sensors based on electric capacity edge effect, by inciting somebody to action Wear particle electrification, aggregate into bulky grain and centrifugal absorption is magnetized into tube wall to improve granule Concentration, increases the dielectric constant of tube wall surface fluid, greatly improves sensor output letter Number intensity the ingenious contradiction solving signal intensity and the conflict of penetration depth index.
2. in pole plate layer designs, introduce efficient frontier length and baroque Piano Curvilinear structures.In this Peano curve structure pole plate layer, excitation pole plate, receive pole plate and The curve of isolation pole plate composition can travel through all of point in square pole plate layer, obtains one It is full of the curve of whole square pole plate sheaf space.In the case of pole plate aspect is amassed and is fixed, This structure has the longest efficient frontier, maximum polar plate area and labyrinth, comes with this Obtain optimum signal intensity.There is not been reported for this technology path.
3. temperature control module, electrification module, electric field are centrifuged module, mechanical centrifugal module, suction The fluid pressure line wear particle monitoring that attached module, adjacent capacitor particulate matter monitoring module combine Technology path, both ensure that monitoring reliability, made again the globality of monitoring system simultaneously Can be optimum.
[accompanying drawing explanation]
Fig. 1 is that using of the present invention is electrified, is centrifuged, is adsorbed and the wear particle of adjacent capacitor The structural representation of on-line monitoring equipment.
Fig. 2 is the structure chart of the electrification module in Fig. 1.
Fig. 3-1 is the structural representation that the electric field in Fig. 1 is centrifuged module.
Fig. 3-2 is the connection diagram that the electric field in Fig. 1 is centrifuged module.
Fig. 4-1 is the schematic diagram of the tangential influent stream centrifugal device in Fig. 1.
Fig. 4-2 is the schematic diagram of the vortex generator centrifugal device in Fig. 1.
Fig. 4-3 is the schematic diagram of the elbow type pipe cyclone centrifugal device in Fig. 1.
Fig. 5-1 is the horizontal schematic diagram that the eddy flow in Fig. 1 is centrifuged module.
Fig. 5-2 is the radial direction schematic diagram that the eddy flow in Fig. 1 is centrifuged module.
Fig. 6 be the adsorbent equipment in Fig. 1 be the structural representation of homopolarity adjacent type absorbing ring.
Fig. 7 be the adsorbent equipment in Fig. 1 be the homopolarity adjacent type absorbing ring of charged hammer Structural representation.
Fig. 8-1 is the radial direction semi-cutaway of the adjacent capacitor particulate matter monitoring module in Fig. 1.
Fig. 8-2 is the transverse cross-sectional view of the adjacent capacitor particulate matter monitoring module in Fig. 1.
Fig. 8-3 is receiving pole plate and encouraging the schematic diagram of pole plate in Fig. 8-1.
Fig. 8-4 is the partial enlarged drawing in Fig. 8-3 at A.
Fig. 9 is the connection diagram of ECU.
[detailed description of the invention]
Refer to shown in Figure of description 1 to accompanying drawing 9, the present invention be one electrification, Being centrifuged, adsorb and the wear particle on-line monitoring equipment of adjacent capacitor, it is by temperature control module 1, electrification module 2, electric field be centrifuged module 3, mechanical centrifugal module 4, adsorption module 5, A few part groups such as adjacent capacitor particulate matter monitoring module 6 and demagnetization module 8 and ECU10 Become.Wherein, described temperature control module 1, electrification module 2, electric field are centrifuged module 3, machinery Centrifugal module 4, adsorption module 5, adjacent capacitor particulate matter monitoring module 6 and demagnetization module 8 It is sequentially connected with.
One end of described temperature control module 1 is provided with fluid entrance 8, for by defeated for hydraulic oil people Device, it is made up of heater, cooler and temperature sensor.This temperature control module 1 is main Syllabus is to provide optimal magnetization temperature about 42 DEG C for magnetizing assembly.Meanwhile, temperature is made For topmost environment noise, different temperature can cause the fluid dielectric in fluid pressure line There is notable change in constant, keeps temperature constant that adjacent capacitive sensors can be avoided to be subject to temperature Degree effect of noise.
Described heater is electric heater, can use the Chongqing gold letter of band temperature detection own Lubricating oil heater.Cooler can be selected for remover for surface evaporation type air cooling, have concurrently water-cooled and The advantage of air cooling, good heat dissipation effect, use light pipe, fluid resistance is little;Cooler fin Type is high wing, and finned tube selects KLM type finned tube, good heat-transfer, thermal contact resistance Little, fin is big with pipe contact area, and laminating closely, firmly, bears cold and hot sudden turn of events energy Power is good, and fin root weather-resistant performance is high;The bank of tubes number optimum of air cooler is 8. Temperature sensor uses platinum resistance temperature sensor.
Referring to shown in Figure of description 2, described electrification module 2 makes wear particle charged, It includes tube wall 21, some electrodes 22 and an electrode controller 23.Wherein, described Some electrodes 22 are installed on tube wall 21, and it is respectively connecting to electrode controller 23.Quilt The fluid being adjusted to most preferably magnetize temperature carries metal particle entrance electrification module 2, passes through Electrode controller 23 applies voltage to electrode 22, so that near electrode 22 in fluid Wear particle is charged.
Referring to shown in Figure of description 3-1 and 3-2, described electric field is centrifuged module 3 and makes Wear particle in hydraulic oil realizes initial centrifugation, it include positive plate 31, minus plate 32, Insulating tape 33 and pole plate controller 34.Wherein, described positive plate 31 and minus plate 32 In being oppositely arranged, described insulating tape 33 between positive plate 31, minus plate 32, and By positive plate 31 and minus plate 32 electrical isolation;Described pole plate controller 34 is electrically connected with To positive plate 31 and minus plate 34.
Charged wear particle flows into electric field froth breaking module 3, electric field with fluid with speed V The centrifugal positive plate 31 of module 3, minus plate 32 are controlled by pole plate controller 34, produce The uniform electric field vertical with speed V direction, the most charged wear particle is centrifuged module at electric field In 3 by being perpendicular to the acting on of electric field force of velocity attitude, make charged particle in this power Doing parabolic motion to pole plate under effect, charged corpuscle adsorbs other microgranule along the direction of motion Form polymeric macroparticle.This parabolic motion specifically refers to charged corpuscle and is axially following oil Liquid moves along a straight line, and radially then does at the uniform velocity or variable motion under electric field force effect, passes through Pole plate controller changes electric field intensity can change movement velocity, makes charged polymeric bulky grain Preliminary motion is to near-wall.
Refer to Figure of description 4-1 to shown in accompanying drawing 5-2, described mechanical centrifugal module 4 Making fluid under the action of the centrifugal, the magnetized particles that quality is bigger is thrown toward cavity wall, and fluid In bubble then shift under centrifugal action at the central axis of pipeline, it can be selected for cutting To influent stream centrifugal device, vortex generator centrifugal device, the centrifugal dress of liquid whild-wind generator Put, elbow type pipe cyclone centrifugal device and eddy flow are centrifuged module.
Referring to Figure of description 5-1 to shown in accompanying drawing 5-2, described eddy flow is centrifuged module 4 Using the mode of energy loss, its design principle is as follows: arrange certain altitude in the duct The flow deflector of the distortion with length, and make blade face tangent line angled with axis, because of pipe Stream 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 screw.This eddy flow is centrifuged module 4 by eddy flow tube wall the 41, first flow deflector 42, a few part groups such as the second flow deflector 43, motor 44 and flow transducer 45 Becoming, described motor 44 and flow transducer 45 are electrically connected to ECU10.
Wherein, described first flow deflector 42 is provided with 3, these 3 first flow deflectors 42 It is uniformly distributed along tube wall 41 inner periphery every 120 °, its laying angle (the first flow deflector 42 And the angle between eddy flow tube wall 41) it is set to 18 °, to ensure optimal tangential flowing. Described second flow deflector 43 is identical with the first flow deflector 42 structure, and it is arranged on first and leads After flow 42, and and the first flow deflector 42 stagger 60 ° and be connected in tube wall 41, its Laying angle is set to 36 DEG C, for reducing resistance and strengthening the intensity of circumferential flow.It addition, 3rd or more flow deflector can be set the most again according to actual separation effect, laying angle by Secondary increase.Described motor 44 connects and drives the first flow deflector 42 and the second water conservancy diversion Sheet 43, to regulate laying angle, thus can obtain more preferable centrifugal effect, know and make water conservancy diversion Sheet 42,43 adapts to different operating modes.Described flow transducer 45 is arranged on tube wall 41 Interior central authorities, the ECU10 numerical analysis cyclonic separation by reading flow quantity sensor 45 Effect, and accordingly control motor 44, motor 44 regulate each flow deflector 42, The laying angle of 43, to obtain more separating effect.
Further, the long limit of described first flow deflector 42 is connected with tube wall 41, minor face 43 along tube wall 41 axis extend;For reducing resistance, its leading edge frustrates into obtuse;For keeping away Exempting to stream, trailing edge is processed into wing;Its height is 0.4 times of tube wall 41 diameter, makes shape The spiral flow become has bigger intensity;1.8 times of a length of tube wall 41 diameter, to protect Demonstrate,prove the bigger sphere of action to fluid.
Referring to shown in Figure of description 6 and accompanying drawing 7, described adsorption module 5 is used for inhaling The attached big microgranule of polymerization being gathered in near-wall after mechanical centrifugal module 4 is centrifugal.Described When adsorption module 5 uses homopolarity adjacent type absorbing ring, this homopolarity adjacent type absorbing ring is by aluminum Matter circulating line 51, forward solenoid 52, reverse solenoid 53 and irony magnetic conduction cap 54 compositions such as parts such as grade.Wherein, described forward solenoid 52 and reverse solenoid 53 are respectively In being arranged in aluminium ring shape pipeline 51 and by ECU10 control, both are connected with in opposite direction Electric current so that forward solenoid 52 and reverse solenoid 53 adjacent produce same sex magnetic Pole.Described irony magnetic conduction cap 54 is arranged on the inwall of aluminium ring shape pipeline 51, its position In forward solenoid 52 and reverse solenoid 53 adjacent and forward solenoid 52 Intermediate point with reverse solenoid 53 axis.
The design principle of described homopolarity adjacent type absorbing ring is as follows: have multiple inside absorbing ring The energization solenoid of ribbon core, adjacent solenoid coil is connected with electric current in opposite direction, Forward solenoid and reverse solenoid adjacent is made to produce like pole.Meanwhile, forward Solenoid and reverse solenoid adjacent and forward solenoid and reverse solenoid axis It is provided with irony magnetic conduction cap at the absorbing ring inwall of intermediate point, puts down with absorbing ring axis in strip OK, the shell of absorbing ring is paramagnetism aluminum matter outer tube wall, and this set is conducive to improving magnetic Road, strengthens the magnetic field intensity at absorbing ring inwall, strengthens the capture absorbability to granule. Each solenoid current is directly controlled by ECU, can according to the size of granule and concentration not Change, to obtain optimal adsorption performance together.After having adsorbed, ECU controls electric magnet Power-off, paramagnetism aluminum matter pipeline loses magnetism, and is attached to magnetic polymeric on inner-walls of duct big Granule enters adjacent capacitor particulate matter monitoring module with fluid along tube wall.
Further, the adjacent type of homopolarity that described adsorbent equipment 5 may be used without charged hammer During absorbing ring, the homopolarity adjacent type absorbing ring of this charged hammer by aluminium ring shape pipeline 51, Forward solenoid 52, reverse solenoid 53, irony magnetic conduction cap 54, dividing plate 55, electric shock The parts compositions such as hammer 56 and electric magnet 57.Wherein, described forward solenoid 52 is with anti- It is respectively arranged in aluminium ring shape pipeline 51 to solenoid 53 and by ECU10 control, two Person is connected with electric current in opposite direction so that forward solenoid 52 and reverse solenoid 53 phase Like pole is produced at Lin.Described irony magnetic conduction cap 54 is arranged in aluminium ring shape pipeline 51 Inwall on, its be 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 With electric magnet 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 electricity Property connects 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: absorbing ring Inside has the energization solenoid of multiple ribbon core, adjacent solenoid coil to be connected with direction phase Anti-electric current so that forward solenoid and reverse solenoid adjacent produce like pole. Meanwhile, forward solenoid and reverse solenoid adjacent and forward solenoid and reversely Irony magnetic conduction cap it is provided with, in strip with suction at the absorbing ring inwall of solenoid axis intermediate point Follower ring axis is parallel, and the shell of absorbing ring is paramagnetism aluminum matter outer tube wall, and this set has It is beneficial to improve magnetic circuit, strengthens the magnetic field intensity at absorbing ring inwall, strengthen and granule is caught Obtain absorbability.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.Between adjoining solenoids Being additionally provided with by the electric hammer of magnet control, two ends are isolated by dividing plate and solenoid magnet.This What one electric shock was hammered into shape is provided for preventing granule bulk deposition at irony magnetic conduction cap, impact from inhaling Attached effect.Now, the inwall of absorbing ring is tapped by magnet control electric hammer so that quilt The granule of absorption scatter to both sides.Meanwhile, when cleaning absorbing ring, striking of electric shock hammer Hit and can also improve cleaning performance.After having adsorbed, tapped by magnet control electric hammer The inwall of absorbing ring so that adsorbed granule scatter to both sides, ECU controls subsequently Electric magnet power-off, 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 8-1 to shown in accompanying drawing 8-4, described adjacent capacitor microgranule Wear particle situation in monitoring modular 6 on-line monitoring fluid pressure line.Described adjacent capacitor is micro- Grain monitoring modular 6 by lucite inwall 61, ground shield 62, receive pole plate 63, Excitation several parts such as pole plate 64 and outer wall 65 composition.Wherein, described machine glass inner wall 61, ground shield 62 and outer wall 65 are in tubular construction, and from-inner-to-outer is arranged successively.
The thickness of described machine glass inner wall 61 is 0.5mm, and dielectric constant is 2.5 (hydraulic pressure The dielectric constant about about 2.1 of oil), and the dielectric constant of hydraulic oil is close, therefore edge Electric capacity is fixed value;When lucite inner wall surface piles with magnetization polymeric macroparticle, magnetic Change polymeric macroparticle, hydraulic oil forms mixed dielectric with lucite inwall, to sensing Device edge capacitance acts on jointly, and 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 causes capacitance sensing The significant change of device edge capacitance, therefore may utilize the change of adjacent capacitive sensors capacitance Change, 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 and penetrates deeply Degree (penetration depth of electric field line), signal intensity (size of capacitance) and noise suppressed, The measurement measuring sensitivity (to change in voltage or the sensitivity of electric field change) and sensor is moved State scope.The capacitance that existing adjacent capacitive sensors measurement obtains is the faintest, generally The least for pF level, to the medium of the low-ks such as metal particle measurement effect The most worse, therefore promote sensor output signal strength particularly critical.Meanwhile, signal is strong Degree 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, polar plate spacing, with And the distance between sensor and object under test, the dielectric constant of determinand suffers from the biggest Relation.Through magnetization polymerization, centrifugal and adsorption treatment wear particle at lucite inwall Surface aggregation, the increase of amounts of particles causes the increase of fluid dielectric constant, aggregation of particles The particle diameter brought increases the increase also making fluid dielectric constant, magnetizes simultaneously and also has increase The function of dielectric constant, three acts on simultaneously, has been greatly reinforced signal intensity;And by It is close to organic glass inner wall surface in granule, penetration depth is required almost nil, also solves Index of having determined collision problem.
Owing to adjacent capacitive sensors output signal strength is the faintest, noise is to measuring knot The impact of fruit is notable.Generally noise is mainly derived from two aspects, the noise of sensor self And environment noise.Devise ground shield for this to reduce sensor self-noise, connect The dielectric constant of ground screen layer 62 is 1.5-2.5, and shielding thickness is adjacent capacitor sensing It is preferred between 1 to 2 times of device 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 It is positioned at outside machine glass inner wall 61, forms gap magnetic field 66 between the two, be used for detecting Aggregated particles 67.Described reception pole plate 63, excitation pole plate 64 all use efficient frontier long And baroque Peano curve structure pole plate layer.This Peano curve structure pole plate layer In, excitation pole plate 63, the curve of reception pole plate 64 composition can travel through square pole plate layer In all of point, obtain one be full of whole square pole plate sheaf space curve.In pole In the case of flaggy area is fixing, this structure has the longest efficient frontier, maximum pad-face Amass 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 Obtaining optimum signal intensity, sensor excitation pole plate uses curved edge also to keep away with receiving pole plate High sensitivity and the unstability of pole plate corner are exempted from.Further, described receiving pole Plate 63, excitation pole plate 64 are provided with sealing coat 69 between the two;The width of described sealing coat 69 Degree is 0.8-1 times of lucite inner wall thickness, its can effectively by reception pole plate 63, Excitation pole plate 64 is isolated.
One end of described demagnetization module 7 is provided with fluid outlet 9, its by remanent magnetism sensor and Demagnetizer forms.Due to the existence of hysteresis, when ferromagnetic material is magnetized into saturation After, even if cancelling externally-applied magnetic field, the magnetic induction in material still returns less than zero point, needs Want 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 senses according to demagnetizer exit remanent magnetism The detected value of device controls the demagnetization intensity of demagnetizer.The demagnetization method herein used is electromagnetism Demagnetization, method is the opposing magnetic field by add suitable so that the magnetic induction in material is strong Degree 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 9, described wear particle on-Line Monitor Device enters one Step includes described ECU10, the PIC16F877 of its optional Microchip company.Institute State remanent magnetism sensor, demagnetizer, heater, cooler, temperature sensor, electrification mould Block 2, electric field are centrifuged module 3, mechanical centrifugal module 4, adsorption module 5 and adjacent electricity Hold particulate matter monitoring module 6 to be all electrically connected on ECU10, and by ECU10 control.
Wear particle monitoring in using above-mentioned wear particle on-line monitoring equipment that hydraulic pressure is had Including following method:
1), the fluid in fluid pressure line carries wear particle and passes through temperature control module 1, passes through It is constant at 42 DEG C that temperature control module 1 controls oil liquid temperature;
2) fluid, being adjusted to most preferably magnetize temperature carries wear particle entrance electrification mould Block 2, electrification module 2 makes the wear particle in fluid charged;
3), charged wear particle is initial centrifugation in electric field is centrifuged module 3, makes band voltolisation Close granule preliminary motion to near-wall;
4), mechanical centrifugal module 4 carries out secondary centrifuging to charged wear particle, makes charged Aggregated particles moves further into near-wall;
5), adsorption module 5 adsorbs that to be gathered in tube wall after mechanical centrifugal module 4 is centrifugal attached Near magnetization polymer particle;Adsorption module 5 power-off afterwards, makes the magnetic being attached on tube wall Property polymeric macroparticle with fluid along tube wall enter adjacent capacitor particulate matter monitoring module 6;
6), by adjacent capacitor particulate matter monitoring module 6 on-line monitoring fluid pressure line weares and teares Microgranule situation;
7), demagnetization module 7 gives magnetized particles demagnetization, prevents magnetic microparticles from entering hydraulic pressure and returns Road, sensitive to pollution Hydraulic Elements cause damage.
Above detailed description of the invention is only the preferred embodiment of this creation, not in order to limit Make this creation, all made within this spirit created and principle any amendment, equivalent Replacement, improvement etc., within should be included in the protection domain of this creation.

Claims (10)

1. with electrification, centrifugal, absorption and the wear particle on-line monitoring method of adjacent capacitor, it is characterized in that: it uses a kind of wear particle on-line monitoring equipment, this equipment includes that temperature control module, electrification module, electric field are centrifuged module, mechanical centrifugal module, adsorption module, adjacent capacitor particulate matter monitoring module and demagnetization module;Wherein, described temperature control module, electrification module, electric field are centrifuged module, mechanical centrifugal module, adsorption module, adjacent capacitor particulate matter monitoring module and demagnetization module and are sequentially connected with;One end of described temperature control module is provided with fluid entrance;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 temperature control module, controls oil liquid temperature by temperature control module constant at 42 DEG C;
2), the fluid being adjusted to most preferably magnetize temperature carries wear particle entrance electrification module, and electrification module makes the wear particle in fluid charged;
3), charged wear particle initial centrifugation in electric field is centrifuged module, make charged polymeric granule preliminary motion to near-wall;
4), mechanical centrifugal module carries out secondary centrifuging to charged wear particle, makes charged polymeric granule move further into near-wall;
5), adsorption module absorption is gathered in the magnetization polymer particle of near-wall after mechanical centrifugal module is centrifugal;Adsorption module power-off afterwards, makes the magnetic polymeric bulky grain being attached on tube wall enter adjacent capacitor particulate matter monitoring module with fluid along tube wall;
6), by wear particle situation in adjacent capacitor particulate matter monitoring module online monitoring fluid pressure line;
7), demagnetization module is to magnetized particles demagnetization.
Electrification the most as claimed in claim 1, centrifugal, absorption and the 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.
Electrification the most as claimed in claim 1, centrifugal, absorption and the wear particle on-line monitoring method of adjacent capacitor, it is characterised in that: described electrification module includes some electrodes and an electrode controller;Described some electrodes are respectively connecting to electrode controller, and by electrode controller control.
Electrification the most as claimed in claim 1, centrifugal, absorption and the wear particle on-line monitoring method of adjacent capacitor, it is characterised in that: described electric field is centrifuged module and includes positive plate, minus plate, insulating tape and pole plate controller;Wherein, described positive plate and minus plate are in being oppositely arranged, and described insulating tape is between positive plate, minus plate, and by positive plate and minus plate electrical isolation;Described pole plate controller is electrically connected on positive plate and minus plate.
Electrification the most as claimed in claim 1, centrifugal, absorption and the wear particle on-line monitoring method of adjacent capacitor, it is characterised in that: described mechanical centrifugal module uses tangential influent stream centrifugal device, vortex generator centrifugal device, liquid whild-wind generator centrifugal device, elbow type pipe cyclone or eddy flow to be centrifuged module.
Electrification the most as claimed in claim 5, centrifugal, absorption and the wear particle on-line monitoring method of adjacent capacitor, it is characterised in that: 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.
Electrification the most as claimed in claim 6, centrifugal, absorption and the 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.
Electrification the most as claimed in claim 6, centrifugal, absorption and the 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.
Electrification the most as claimed in claim 1, centrifugal, absorption and the wear particle on-line monitoring method of adjacent capacitor, it is characterised in that: described adjacent capacitor particle monitoring device 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.
Electrification the most as claimed in claim 1, centrifugal, absorption and the wear particle on-line monitoring method of adjacent capacitor, it is characterized in that: it farther includes an ECU, described remanent magnetism sensor, demagnetizer, heater, cooler, temperature sensor, electrification module, electric field are centrifuged module, mechanical centrifugal module, adsorption module and adjacent capacitor particulate matter monitoring module and are all electrically connected on ECU, and by ECU control.
CN201610312194.8A 2016-05-12 2016-05-12 On-line wear particle monitoring method achieved through electrification, centrifugation, adsorption and adjacent capacitance Pending CN106018216A (en)

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