CN105909608A - Filtering method adopting magnetization and adsorption for hydraulic system - Google Patents
Filtering method adopting magnetization and adsorption for hydraulic system Download PDFInfo
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- CN105909608A CN105909608A CN201610312245.7A CN201610312245A CN105909608A CN 105909608 A CN105909608 A CN 105909608A CN 201610312245 A CN201610312245 A CN 201610312245A CN 105909608 A CN105909608 A CN 105909608A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C1/00—Magnetic separation
- B03C1/02—Magnetic separation acting directly on the substance being separated
- B03C1/23—Magnetic separation acting directly on the substance being separated with material carried by oscillating fields; with material carried by travelling fields, e.g. generated by stationary magnetic coils; Eddy-current separators, e.g. sliding ramp
- B03C1/24—Magnetic separation acting directly on the substance being separated with material carried by oscillating fields; with material carried by travelling fields, e.g. generated by stationary magnetic coils; Eddy-current separators, e.g. sliding ramp with material carried by travelling fields
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/04—Special measures taken in connection with the properties of the fluid
- F15B21/041—Removal or measurement of solid or liquid contamination, e.g. filtering
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/04—Special measures taken in connection with the properties of the fluid
- F15B21/042—Controlling the temperature of the fluid
Abstract
The invention relates to a filtering method adopting magnetization and adsorption for a hydraulic system. Separation of solid particles is achieved through a U-shaped particle separating module, and the solid particles in oil are made to move to the pipe wall; at an outlet of the U-shaped particle separating module, the oil which is rich in the solid particles and near the pipe wall enters an oil return barrel through an oil return barrel oil inlet pipe and then flows back into an oil tank, and the oil which contains trace of small-diameter particles and is located in the pipe center enters an inner barrel through an inner barrel oil inlet pipe to be subjected to high-precision filtering, so that the service life of a filter element is prolonged, and the filtering cost and complexity are lowered; the oil entering the inner barrel oil inlet pipe flows into a spiral flow channel of the inner barrel in a tangential inflow mode, the inner barrel wall is used as the filter element, filter liquor flows close to the filter element under the effect of centrifugal force, the filter liquor quickly flows in parallel to the surface of the filter element, and the filtered hydraulic oil flows out to an outer barrel in the direction perpendicular to the surface of the filter element; and polluting particles deposited at the bottom of the inner barrel can be regularly discharged to the oil return barrel through an electrically operated check valve, so that the service life of the filter element is prolonged.
Description
[technical field]
The present invention relates to a kind of hydraulic oil filtering method, be specifically related to a kind of hydraulic system filter method using magnetization and absorption, belong to technical field of hydraulic equipment.
[background technology]
Statistics both domestic and external show, the fault of hydraulic system about 70% ~ 85% causes due to oil contamination.Solid particle is then the pollutant the most universal in oil contamination, damaging effect is maximum.The hydraulic system fault caused by solid grain contamination accounts for the 70% of gross contamination fault.In particulate pollutant in hydraulic system oil liquid, metal filings accounting is between 20% ~ 70%.Adopt an effective measure the solid grain contamination filtering in fluid, be the key of Pollution Control in Hydraulic System, be also the Reliable guarantee of system safety operation.
Filter is the key element that hydraulic system filters solid grain contamination.Solid grain contamination in hydraulic oil, outside the precipitable a part of larger particles of oil removal box, filters mainly by oil-filtering apparatus.Especially high pressure filtering device, is mainly used to filter flow direction control valve and the hydraulic oil of hydraulic cylinder, to protect the Hydraulic Elements of this kind of contamination resistance difference, therefore requires higher to the cleannes of hydraulic oil.
But, the high pressure filter that existing hydraulic system uses has the disadvantage that the cleannes of fluid are required different by (1) all kinds of Hydraulic Elements, the size of the solid particle in fluid is the most different, need for this diverse location in hydraulic system that multiple dissimilar wave filter are installed, thus bring cost and the problem installing complexity；(2) filter in hydraulic system mainly uses cake filtration mode, during filtration, filtrate is perpendicular to filter element surface flowing, trapped solid particle forms filter cake progressive additive, and the rate of filtration is gradually reduced the most therewith until filtrate stops flowing out, and reduces the service life of filter element.
Therefore, for solving above-mentioned technical problem, using of a kind of innovation of necessary offer magnetizes and the hydraulic system filter method of absorption, to overcome described defect of the prior art.
[summary of the invention]
For solving above-mentioned technical problem, it is an object of the invention to provide a kind of strainability good, adaptability and integration are high, and service life, the employing of length magnetized and the hydraulic system filter method of absorption.
For achieving the above object, the technical scheme that the present invention takes is: a kind of hydraulic system filter method using magnetization and absorption, it uses a kind of defecator, and this device includes base plate, U-shaped separation of particles module, oil returning tube, inner core, helical flow path, filter element, outer barrel and end cap；Wherein, described U-shaped separation of particles module, oil returning tube, outer barrel are sequentially placed on base plate；Described U-shaped separation of particles module is provided with a hydraulic oil inlet, and it includes a U-tube, and U-tube is sequentially installed with temperature control module, magnetized module, adsorption module and demagnetization module；The top of described U-shaped separation of particles module and oil returning tube is connected by an oil returning tube oil inlet pipe；Described inner core is placed in outer barrel, if it is installed on end cap by a top board and bolt stem；Described helical flow path is contained in inner core, is connected by an inner core oil inlet pipe between itself and U-shaped separation of particles module；Described inner core oil inlet pipe is positioned at oil returning tube oil inlet pipe, and extends into the central authorities of U-shaped separation of particles module, and its diameter is less than oil returning tube oil inlet pipe diameter, and and oil returning tube oil inlet pipe be coaxially disposed；Described filter element is arranged on the inwall of inner core；The bottom of said tub is provided with a hydraulic oil oil-out；
It comprises the steps:
1), backflow force feed enters the temperature control module of U-shaped separation of particles module, by temperature control module regulation oil temperature to optimal magnetization temperature 40-50 DEG C, enters magnetized module afterwards；
2), make the metallic particles in fluid be magnetized in magnetic field by magnetized module, and make micron-sized metallic particles aggregate into bulky grain；Enter adsorption module afterwards；
3), by the magnetic polymeric microgranule in adsorption module absorption oil return；Enter demagnetization module afterwards；
4), magnetic particle magnetic is eliminated by demagnetization module；
5), the fluid of U-shaped separation of particles module near-wall is back to fuel tank after entering oil returning tube by oil returning tube oil inlet pipe, and the fluid of the pipeline center containing trace small particle microgranule then enters inner core by inner core oil inlet pipe and carries out high-precision filtration；
6), the fluid carrying small particle microgranule flows into the helical flow path of inner core in the way of tangential influent stream, and fluid is close to filter core flow under the influence of centrifugal force, and is carried out high-precision filtration；
7), the fluid after high-precision filtration enters urceolus, and is discharged by the hydraulic oil oil-out bottom urceolus.
The hydraulic system filter method using magnetization and absorption 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 hydraulic system filter method using magnetization and absorption 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；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 hydraulic system filter method using magnetization and absorption of the present invention is further: described adsorption module specifically uses homopolarity adjacent type absorbing ring, this homopolarity adjacent type absorbing ring to include aluminium ring shape pipeline, forward solenoid, reverse solenoid and irony magnetic conduction cap；Described forward solenoid and reverse solenoid are respectively arranged in aluminium ring shape pipeline and by ECU control, 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 hydraulic system filter method using magnetization and absorption of the present invention is further: described adsorption module specifically uses the homopolarity adjacent type absorbing ring of charged hammer, and the homopolarity adjacent type absorbing ring of this charged hammer includes aluminium ring shape pipeline, forward solenoid, reverse solenoid, irony magnetic conduction cap, dividing plate, electric shock hammer and 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 hydraulic system filter method using magnetization and absorption of the present invention is further: the bottom of described oil returning tube is provided with an overflow valve, is provided with an automatically controlled set screw bottom this overflow valve；Described overflow valve is provided with an oil drain out, and this oil drain out is connected to a fuel tank by pipeline.
The hydraulic system filter method using magnetization and absorption of the present invention is further: the bottom of described inner core is rounding mesa-shaped, and it is connected by an inner core oil exit pipe and oil returning tube, and inner core oil exit pipe is provided with an automatically controlled check-valves.
The present invention use magnetization and absorption hydraulic system filter method be further: the center upright of described inner core is provided with a hollow cylinder, hollow cylinder be arranged over pressure difference indicator, this pressure difference indicator is installed on end cap.
The hydraulic system filter method using magnetization and absorption of the present invention is further: described inner core oil inlet pipe and the tangent connection of helical flow path.
The hydraulic system filter method using magnetization and absorption of the present invention is also: the precision of described filter element is 1-5 micron.
Compared with prior art, there is advantages that
1. hydraulic oil realizes the separation of solid particle in U-shaped separation of particles module, make the solid particle in fluid to vessel wall motion, at U-shaped separation of particles module outlet, fluid rich in the near-wall of solid particle passes through to be back to fuel tank after oil returning tube oil inlet pipe enters oil returning tube, the only fluid of the pipeline center containing trace small particle microgranule then carries out high-precision filtration by inner core oil inlet pipe entrance inner core, improve the service life of filter element, reduce filtering cost and complexity；The fluid entering inner core oil inlet pipe flows into the helical flow path of inner core in the way of tangential influent stream, inner tube wall is filter element, then filtrate is close to filter core flow under the influence of centrifugal force, filtrate is parallel to the surface of filter element and quickly flows, hydraulic oil after filtration is then perpendicular to cartridge surface direction and flows out to urceolus, the microgranule of cartridge surface is implemented to sweep stream effect by this cross flow filter type, inhibit the increase of filter cake thickness, it is deposited on the pollution granule bottom inner core and regularly can be discharged to oil returning tube by automatically controlled check-valves, thus improve filter element service life.
2. by controlling temperature and the magnetic field intensity of hydraulic oil, make that the granule in fluid is force-magnetized is gathered into bulky grain, and promote colloidal particles decomposition to melt, efficient absorption is formed by adsorption module, avoid residual particles demagnetization endangering Hydraulic Elements by degaussing gear, so that solid particle is gathered into bulky grain and moves to near-wall in fluid.
3. the generation of non-uniform magnetic-field that magnetization needs, need multipair forward and reverse coil to and by different size of electric current, and current values can digital setting online.
[accompanying drawing explanation]
Fig. 1 is the structural representation of the hydraulic system defecator using magnetization and absorption of the present invention.
Fig. 2 is the schematic diagram of the U-shaped separation of particles module in Fig. 1.
Fig. 3 is the structural representation of the magnetized module in Fig. 2.
Fig. 4 is the structural representation of the winding in Fig. 3.
Fig. 5 is the circuit diagram of the magnetizing current output module in Fig. 3.
Fig. 6 be the adsorption module of Fig. 2 be the structural representation of homopolarity adjacent type absorbing ring.
Fig. 7 be the adsorption module in Fig. 2 be the structural representation of the homopolarity adjacent type absorbing ring of charged hammer.
[detailed description of the invention]
Refer to shown in Figure of description 1 to accompanying drawing 7, the present invention is a kind of hydraulic system defecator using magnetization and absorption, and it is made up of several parts such as base plate 6, U-shaped separation of particles module 3, oil returning tube 7, inner core 15, helical flow path 17, filter element 18, outer barrel 19 and end caps 25.
Wherein, described U-shaped separation of particles module 2, oil returning tube 7, outer barrel 19 are sequentially placed on base plate 6.Described U-shaped separation of particles module 3 is provided with one for being passed through the hydraulic oil inlet 1 of hydraulic oil, and it includes a U-tube 31, and U-tube 31 is sequentially installed with temperature control module 32, magnetized module 33, adsorption module 34 and demagnetization module 35.
Described temperature control module 32 main purpose is to provide optimal magnetization temperature 40-50 DEG C for magnetized module 33, the most also has the effect of fluid viscosity reduction concurrently, and it includes heater, cooler and temperature sensor.Described heater uses the lubricating oil heater of the Chongqing gold letter of band temperature detection.Described cooler can be selected for remover for surface evaporation type air cooling, the advantage having water-cooled and air cooling concurrently, good heat dissipation effect, 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.Described temperature sensor uses platinum resistance temperature sensor.
Described magnetized module 33 realizes the force-magnetized of metallic particles, and makes micron-sized metallic particles aggregate into bulky grain, it is simple to subsequent adsorbtion separates.Magnetized module 32 it is also required to provide non-uniform magnetic-field simultaneously, the colloidal particles in hydraulic oil carries out magnetization and decomposes, the microgranule making colloid particulate breakup be smaller particle size, pollution abatement.
Described magnetized module 33 is made up of aluminum matter pipeline 331, some windings 332, iron shell 333, flange 334 and some magnetizing current output modules 335.Wherein, described aluminum matter pipeline 331 makes fluid flow there through and by magnetization treatment, and the pcrmeability of aluminum is the lowest, can make to obtain in pipeline 331 higher magnetic field intensity.
Described some windings 332, rotating around outside aluminum matter pipeline 331, are coated insullac by the copper wire of a diameter of about 1.0mm and make.Each winding 332 is all separate setting, is controlled by corresponding magnetizing current output module 335 respectively, and wherein electric current needs different according to system.Separate owing to often enclosing winding 332, 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 331 internal magnetic field uneven, thus affects magnetic efficiency.For solving this problem, the often circle winding 332 of this creation is all made up of positive winding 336 and inverse winding 337 in order to produce the magnetic field in same polarity direction and to make up the magnetic field that breach causes unbalanced simultaneously.Size of current in positive winding and inverse winding is equal.Aluminum matter pipeline 331 axis direction is arranged with multipair forward and reverse winding, by different electric currents, in order to form the non-uniform magnetic-field of aforementioned claim.
Described iron shell 333 is coated on aluminum matter pipeline 331, and the material of irony can mask most magnetic flux.Described flange 334 is welded on the two ends of aluminum matter pipeline 331, and by flange flange 334 in U-tube 20.
Each magnetizing current output module 335 is connected to a winding 332, and it utilizes the feature of digital potentiometer real time modifying resistance, it is achieved the real-time control of non-uniform magnetic-field.The circuit theory diagrams of described magnetizing current output module 335 can be found in accompanying drawing 5, and its digital potentiometer used is AD5206, has the defeated of 6 passages.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 adsorption module 34 is for adsorbing the big microgranule of magnetic polymeric after magnetized module 33 magnetizes, it can use homopolarity adjacent type absorbing ring, this homopolarity adjacent type absorbing ring to be made up of parts such as aluminium ring shape pipeline 341, forward solenoid 342, reverse solenoid 343 and irony magnetic conduction caps 344.Wherein, described forward solenoid 342 and reverse solenoid 343 are respectively arranged in aluminium ring shape pipeline 341, and both are connected with electric current in opposite direction so that forward solenoid 342 and reverse solenoid 343 adjacent produce like pole.Described irony magnetic conduction cap 344 is arranged on the inwall of aluminium ring shape pipeline 341, and it is positioned at forward solenoid 342 and reverse solenoid 343 adjacent and forward solenoid 342 and the intermediate point of reverse solenoid 343 axis.
The design principle of described homopolarity adjacent type absorbing ring is as follows: energising forward solenoid 342, reverse solenoid 343, adjacent forward solenoid 342, reverse solenoid 343 are connected with electric current in opposite direction so that forward solenoid 342, reverse solenoid 343 adjacent produce like pole；Meanwhile, aluminium ring shape pipeline 341 can improve magnetic circuit, strengthens the magnetic field intensity at inner-walls of duct, strengthens the irony magnetic conduction cap 344 capture absorbability to granule.Each forward solenoid 342, reverse solenoid 343 electric current can be different with concentration and change, to obtain optimal adsorption performance according to the size of granule.
Further, the homopolarity adjacent type absorbing ring that described adsorption module 34 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 341, forward solenoid 342, reverse solenoid 343, irony magnetic conduction cap 344, dividing plate 345, electric shock hammer 346 and electric magnet 347.Wherein, described forward solenoid 342 and reverse solenoid 343 are respectively arranged in aluminium ring shape pipeline 341, and both are connected with electric current in opposite direction so that forward solenoid 342 and reverse solenoid 343 adjacent produce like pole.Described irony magnetic conduction cap 344 is arranged on the inwall of aluminium ring shape pipeline 341, and it is positioned at forward solenoid 342 and reverse solenoid 343 adjacent and forward solenoid 342 and the intermediate point of reverse solenoid 343 axis.Described electric shock hammer 346 and electric magnet 347 are between dividing plate 345.Described electric magnet 347 connects and can promote electric shock hammer 346, makes electric shock hammer 346 percussion aluminium ring shape pipeline 342 inwall.
The design principle of the homopolarity adjacent type absorbing ring of described charged hammer is as follows: energising forward solenoid 342, reverse solenoid 343, adjacent forward solenoid 342, reverse solenoid 343 are connected with electric current in opposite direction so that forward solenoid 342, reverse solenoid 343 adjacent produce like pole；Meanwhile, aluminium ring shape pipeline 341 can improve magnetic circuit, strengthens the magnetic field intensity at inner-walls of duct, strengthens the irony magnetic conduction cap 344 capture absorbability to granule.Each forward solenoid 342, reverse solenoid 343 electric current can be different with concentration and change, to obtain optimal adsorption performance according to the size of granule.And by the setting of electric shock hammer 346, prevent granule bulk deposition at irony magnetic conduction cap 344, affect adsorption effect.Now, the inwall of electric shock hammer 346 percussion pipeline 341 is controlled by electric magnet 347 so that adsorbed granule scatter to both sides.Meanwhile, when cleaning pipeline 341, the percussion of electric shock hammer 346 can also improve cleaning performance.
Described adsorption module 34 is designed to U-shaped, when fluid enters U-shaped absorption pipeline, granule gravity, centrifugal force effect under, to side, tube wall moves, and plus magnetic field force effect, moves radially speed and accelerates, and the efficiency of granular absorption is improved；Fluid leave U-shaped absorption pipeline rise time, move so that the direction that granule is diagonally lower gravity and magnetic field force with joint efforts, extend the numerical density time, improve the efficiency of granular absorption.
Described demagnetization module 35 gives magnetized particles demagnetization, prevents residual magnetism microgranule from entering hydraulic circuit by oil returning tube oil inlet pipe, and sensitive to pollution Hydraulic Elements cause damage.
The top of described U-shaped separation of particles module 3 and oil returning tube 7 is connected by an oil returning tube oil inlet pipe 22；After being processed by U-shaped separation of particles module 3, the fluid of U-tube 31 near-wall, rich in aggregated particles, is back to fuel tank after entering oil returning tube 7 by oil returning tube oil inlet pipe 22.
The bottom of described oil returning tube 7 is provided with an overflow valve 8, is provided with an automatically controlled set screw 9 bottom this overflow valve 8；Described overflow valve 8 is provided with an oil drain out 10, and this oil drain out 10 is connected to a fuel tank 11 by pipeline 20.
Described inner core 15 is placed in outer barrel 19, if it is installed on end cap 25 by a top board 13 and bolt stem 21.Described helical flow path 17 is contained in inner core 15, is connected by an inner core oil inlet pipe 12 between itself and U-shaped separation of particles module 3, specifically, and described inner core oil inlet pipe 12 and the tangent connection of helical flow path 17.The fluid of the U-tube 31 pipeline center only small particle microgranule Han trace, enters inner core 15 by inner core oil inlet pipe 12 and realizes high-precision filtration, thus realize solid particle and separate.Further, described inner core oil inlet pipe 12 is positioned at oil returning tube oil inlet pipe 22, and extends into the central authorities of U-shaped separation of particles module 3, and its diameter is less than oil returning tube oil inlet pipe 22 diameter, and and oil returning tube oil inlet pipe 22 be coaxially disposed.
Further, the bottom of described inner core 15 is rounding mesa-shaped, and it is connected by an inner core oil exit pipe 23 and oil returning tube 7, and inner core oil exit pipe 23 is provided with an automatically controlled check-valves 24.The center upright of described inner core 15 is provided with a hollow cylinder 16, hollow cylinder 16 be arranged over pressure difference indicator 14, this pressure difference indicator 14 is installed on end cap 25.
Described filter element 18 is arranged on the inwall of inner core 15, and its precision is 1-5 micron.
The bottom of said tub 19 is provided with a hydraulic oil oil-out 5, is discharged by the hydraulic oil filtered by hydraulic oil oil-out 5.
In the present invention, owing to U-shaped separation of particles module 3 is to solid particle separation of polymeric effect in fluid, in the fluid in U-shaped separation of particles module 3 exit, the fluid at the center only small particle microgranule Han trace, this part fluid is flowed into inner core 15 from inner core oil inlet pipe 12 and carries out high-precision filtration；And the fluid of near-wall is rich in aggregated particles, this part fluid enters oil returning tube 7 by oil returning tube oil inlet pipe 22, then flows back to fuel tank 11 through the oil drain out 10 of overflow valve 8, thus realizes solid particle by grain diameter shunting filtering.Herein, oil returning tube 7 and overflow valve 8 serve aforesaid macrofiltration, thus save filter number, reduce system cost and complexity.The automatically controlled set screw 9 of overflow valve 8 is used for regulating oil pressure relief, its pressure is adjusted to slightly below pressure at filtering outlet, to ensure inner core 15 filtering traffic.
It addition, traditional filter mainly uses cake filtration mode, during filtration, filtrate is perpendicular to filter element surface flowing, trapped solid particle forms filter cake progressive additive, the rate of filtration is gradually reduced the most therewith, until filtrate stops flowing out, reduces the service life of filter element.In this present invention, carry the filtrate of small particle microgranule from inner core oil inlet pipe 12 in the way of tangential influent stream, flow into the helical flow path 17 of inner core 15, inner core 15 wall of helical duct 17 side is high-precision filter element 18, filtrate is close to filter element 18 surface under the influence of centrifugal force, filtrate is parallel to the surface of filter element 18 and quickly flows, hydraulic oil after filtration is then perpendicular to filter element 18 surface direction and flows out to urceolus 19, and the direction of the two flowing is orthogonal staggered, therefore is called cross flow and filters.The quickly flowing of filtrate is applied with shearing to the microgranule being gathered in filter element 18 surface and sweeps stream effect, thus inhibit the increase of filter cake thickness, making rate of filtration near constant, filter pressure also will not raise with the passing of time, service life of filter element thus increase substantially.Accumulation along with filtration time, it is deposited on the pollution granule bottom inner core 15 inverted round stage to be stepped up, the rate of filtration slowly declines, in inner core 15, unfiltered filtrate rises along the hollow cylinder 16 at center, now, pressure difference indicator 14 works, monitor the change of its pressure, that is the stopping state of filter element 18 bottom inner core 15, if exceeding threshold value, then regulate automatically controlled set screw 9 and reduce oil pressure relief, and open check-valves 24 simultaneously, the filtrate containing more pollution granule bottom inner core 15 is made to be discharged to oil returning tube 7 by inner core oil exit pipe 23 under differential pressure action, avoid bottom filter element 18 blockage to deteriorate, thus extend filter element 18 service life.
Use above-mentioned oil-filtering apparatus that backflow is pressed with the processing step of process as follows:
1), backflow force feed enters the temperature control module 32 of U-shaped separation of particles module 3, regulates oil temperature to optimal magnetization temperature 40-50 DEG C by temperature control module 32, afterwards entrance magnetized module 33；
2), make the metallic particles in fluid be magnetized in magnetic field by magnetized module 33, and make micron-sized metallic particles aggregate into bulky grain；Enter adsorption module 34 afterwards；
3), the magnetic polymeric microgranule in oil return is adsorbed by adsorption module 34；Enter demagnetization module 35 afterwards；
4), magnetic particle magnetic is eliminated by demagnetization module 35；
5), the fluid of U-shaped separation of particles module 3 near-wall is back to fuel tank after entering oil returning tube 7 by oil returning tube oil inlet pipe 22, and the fluid of the pipeline center containing trace small particle microgranule then enters inner core 15 by inner core oil inlet pipe 12 and carries out high-precision filtration；
6), the fluid carrying small particle microgranule flows into the helical flow path 17 of inner core 15 in the way of tangential influent stream, and fluid is close to filter core flow under the influence of centrifugal force, and is carried out high-precision filtration；
7), the fluid after high-precision filtration enters urceolus 19, and is discharged by the hydraulic oil oil-out 5 bottom urceolus 19.
Above detailed description of the invention is only the preferred embodiment of this creation, 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. the hydraulic system filter method using magnetization and absorption, it is characterised in that: it uses a kind of defecator, and this device includes base plate, U-shaped separation of particles module, oil returning tube, inner core, helical flow path, filter element, outer barrel and end cap；Wherein, described U-shaped separation of particles module, oil returning tube, outer barrel are sequentially placed on base plate；Described U-shaped separation of particles module is provided with a hydraulic oil inlet, and it includes a U-tube, and U-tube is sequentially installed with temperature control module, magnetized module, adsorption module and demagnetization module；The top of described U-shaped separation of particles module and oil returning tube is connected by an oil returning tube oil inlet pipe；Described inner core is placed in outer barrel, if it is installed on end cap by a top board and bolt stem；Described helical flow path is contained in inner core, is connected by an inner core oil inlet pipe between itself and U-shaped separation of particles module；Described inner core oil inlet pipe is positioned at oil returning tube oil inlet pipe, and extends into the central authorities of U-shaped separation of particles module, and its diameter is less than oil returning tube oil inlet pipe diameter, and and oil returning tube oil inlet pipe be coaxially disposed；Described filter element is arranged on the inwall of inner core；The bottom of said tub is provided with a hydraulic oil oil-out；
It comprises the steps:
1), backflow force feed enters the temperature control module of U-shaped separation of particles module, by temperature control module regulation oil temperature to optimal magnetization temperature 40-50 DEG C, enters magnetized module afterwards；
2), make the metallic particles in fluid be magnetized in magnetic field by magnetized module, and make micron-sized metallic particles aggregate into bulky grain；Enter adsorption module afterwards；
3), by the magnetic polymeric microgranule in adsorption module absorption oil return；Enter demagnetization module afterwards；
4), magnetic particle magnetic is eliminated by demagnetization module；
5), the fluid of U-shaped separation of particles module near-wall is back to fuel tank after entering oil returning tube by oil returning tube oil inlet pipe, and the fluid of the pipeline center containing trace small particle microgranule then enters inner core by inner core oil inlet pipe and carries out high-precision filtration；
6), the fluid carrying small particle microgranule flows into the helical flow path of inner core in the way of tangential influent stream, and fluid is close to filter core flow under the influence of centrifugal force, and is carried out high-precision filtration；
7), the fluid after high-precision filtration enters urceolus, and is discharged by the hydraulic oil oil-out bottom urceolus.
2. the hydraulic system filter method using magnetization and absorption as claimed in claim 1, 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.
3. the hydraulic system filter method using magnetization and absorption as claimed in claim 1, it is characterised in that: described magnetized module includes aluminum matter pipeline, some windings, iron shell, flange and some magnetizing current output modules；Wherein, described some windings are rotating around outside aluminum matter pipeline, and each winding is made up of positive winding and inverse winding；Described iron shell is coated on aluminum matter pipeline；Described flange welding is at the two ends of aluminum matter pipeline；Each magnetizing current output module is connected to a winding.
4. the hydraulic system filter method using magnetization and absorption as claimed in claim 1, it is characterized in that: described adsorption module specifically uses homopolarity adjacent type absorbing ring, this homopolarity adjacent type absorbing ring to include aluminium ring shape pipeline, forward solenoid, reverse solenoid and irony magnetic conduction cap；Described forward solenoid and reverse solenoid are respectively arranged in aluminium ring shape pipeline and by ECU control, 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.
5. the hydraulic system filter method using magnetization and absorption as claimed in claim 1, it is characterized in that: described adsorption module specifically uses the homopolarity adjacent type absorbing ring of charged hammer, the homopolarity adjacent type absorbing ring of this charged hammer includes aluminium ring shape pipeline, forward solenoid, reverse solenoid, irony magnetic conduction cap, dividing plate, electric shock hammer and 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.
6. the hydraulic system filter method using magnetization and absorption as claimed in claim 1, it is characterised in that: the bottom of described oil returning tube is provided with an overflow valve, is provided with an automatically controlled set screw bottom this overflow valve；Described overflow valve is provided with an oil drain out, and this oil drain out is connected to a fuel tank by pipeline.
7. the hydraulic system filter method using magnetization and absorption as claimed in claim 1, it is characterised in that: the bottom of described inner core is rounding mesa-shaped, and it is connected by an inner core oil exit pipe and oil returning tube, and inner core oil exit pipe is provided with an automatically controlled check-valves.
8. the as claimed in claim 1 hydraulic system filter method using magnetization and absorption, it is characterised in that: the center upright of described inner core is provided with a hollow cylinder, hollow cylinder be arranged over pressure difference indicator, this pressure difference indicator is installed on end cap.
9. the hydraulic system filter method using magnetization and absorption as claimed in claim 1, it is characterised in that: described inner core oil inlet pipe and the tangent connection of helical flow path.
10. the hydraulic system filter method using magnetization and absorption as claimed in claim 1, it is characterised in that: the precision of described filter element is 1-5 micron.
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| CN201610312245.7A CN105909608A (en) | 2016-05-12 | 2016-05-12 | Filtering method adopting magnetization and adsorption for hydraulic system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112943713A (en) * | 2021-02-19 | 2021-06-11 | 燕山大学 | Labyrinth type hydraulic oil tank |
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