CN103807250B - The electronic filter device and method of a kind of associated hydraulic and lubricating area oil product - Google Patents
The electronic filter device and method of a kind of associated hydraulic and lubricating area oil product Download PDFInfo
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- CN103807250B CN103807250B CN201410063004.4A CN201410063004A CN103807250B CN 103807250 B CN103807250 B CN 103807250B CN 201410063004 A CN201410063004 A CN 201410063004A CN 103807250 B CN103807250 B CN 103807250B
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- 230000001050 lubricating effect Effects 0.000 title claims abstract description 16
- 238000000034 method Methods 0.000 title claims abstract description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 40
- 239000000835 fiber Substances 0.000 claims abstract description 33
- 239000002828 fuel tank Substances 0.000 claims abstract description 24
- 230000005684 electric field Effects 0.000 claims abstract description 10
- 239000003921 oil Substances 0.000 claims description 95
- 239000013618 particulate matter Substances 0.000 claims description 21
- 239000003344 environmental pollutant Substances 0.000 claims description 20
- 231100000719 pollutant Toxicity 0.000 claims description 20
- 238000010521 absorption reaction Methods 0.000 claims description 12
- 239000002245 particle Substances 0.000 claims description 12
- 238000001914 filtration Methods 0.000 claims description 11
- 230000005686 electrostatic field Effects 0.000 claims description 9
- 239000010720 hydraulic oil Substances 0.000 claims description 9
- 230000000694 effects Effects 0.000 claims description 8
- 230000033001 locomotion Effects 0.000 claims description 8
- 239000008187 granular material Substances 0.000 claims description 7
- 239000011888 foil Substances 0.000 claims description 6
- 210000000440 neutrophil Anatomy 0.000 claims description 6
- 239000011088 parchment paper Substances 0.000 claims description 6
- 101150070930 NAS3 gene Proteins 0.000 claims description 4
- 238000004140 cleaning Methods 0.000 claims description 4
- 238000001514 detection method Methods 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 239000005030 aluminium foil Substances 0.000 claims description 3
- 239000002131 composite material Substances 0.000 claims description 3
- 238000000502 dialysis Methods 0.000 claims description 3
- 230000010287 polarization Effects 0.000 claims description 3
- 230000011664 signaling Effects 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 abstract description 8
- 238000000967 suction filtration Methods 0.000 abstract description 4
- 230000003247 decreasing effect Effects 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 abstract description 2
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 238000012544 monitoring process Methods 0.000 abstract description 2
- 238000011175 product filtration Methods 0.000 abstract description 2
- 238000004064 recycling Methods 0.000 abstract description 2
- 238000005265 energy consumption Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 101100293604 Hordeum vulgare NAS7 gene Proteins 0.000 description 2
- 101100529043 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) RPN9 gene Proteins 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 239000000123 paper Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 101100459772 Caenorhabditis elegans nas-10 gene Proteins 0.000 description 1
- 206010010356 Congenital anomaly Diseases 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 239000000306 component Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
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- 238000009434 installation Methods 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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Abstract
The present invention relates to hydraulic pressure and lubricating area oil product filtration art, the specifically electronic filter device and method of a kind of associated hydraulic and lubricating area oil product, comprise pump, control system, high pressure electrostatic generator, electronics filter element device, high-density fiber water suction filtrating equipment, pressure transducer, moisture transducer, fuel tank oil drain out pipeline connects the entrance point of high-density fiber water suction filter element device by pump, high-density fiber water suction filtration core device connects the entrance point in the left side of high-pressure electronic filter element device by solenoid valve one tunnel, outlet end on the right side of high-pressure electronic filter element device connects hydraulic reservoir inlet tube, high-pressure electronic filter element device produces the positive negative electric field of high pressure.Compared with the existing technology, its advantage is in the present invention: reduce oil change frequency, hydraulic pressure oil product can reuse, and realizes recycling economy; Reduce equipment failure rate and maintenance number of times, extension device working life, realize on-line automatic operation, on-line monitoring; Decreasing pollution thing discharges, Green environmental protection equipment.
Description
[technical field]
The present invention relates to hydraulic pressure and lubricating area oil product filtration art, specifically the electronic filter device and method of a kind of associated hydraulic and lubricating area oil product.
[background technique]
Most actions of hydraulic equipment have come primarily of hydraulic transmission and hydraulic control system, and therefore can say that hydraulic system is the heart of hydraulic equipment, it plays very important effect.Hydraulic Power Transmission System and hydraulic control system are all come by the motion of hydraulic oil, and hydraulic oil can be contaminated in long-term work process, and major part pollution is inevitable.The major pollutants of hydraulic oil are: moisture, particulate matter, oxidation greasy filth.Pollutant Producing reason has following several aspect:
1, assembling is polluted: equipment in production, in installation and adjustment process, the congenital pollution that the particle systems of entering such as burr, sand, metal fragment cause; The pollutant that equipment is mixed in dismounting, transport, servicing operations;
2, generative nature pollutes: because production environment is severe, under high pressure run for a long time, and the equipment movement pair surface that particle causes in the course of the work weares and teares the pollution caused; It is greasy that oil oxidation produces;
3, imbedibility pollutes: the pollution that dust granule and moisture are caused by systems of entering such as hydraulic system air hole, cylinder seal, fresh oil filling;
4, the intrinsic pollution in oil product: the new oil added, according to its grade containing certain particulate matter and moisture, absolute cleanliness is not accomplished, and oil product higher grade its cost is higher yet.Its turbidity test grade of the oil newly dispatched from the factory is mostly in NAS7-8 level, and be greater than every 100 milliliter about 50,000 of the particulate matter of 5 microns, moisture content is at 200ppm.
In order to keep oil product clean, filtration device all installed by major part hydraulic equipment, these filtration devices mainly carry out interception by paper filter core and filter, and filter core can solve some problems, but cannot thoroughly solve oil pollution problem, filter element filtering limited precision on the one hand, most of filter element filtering precision is 10 microns, and the particle of 0.2 micron will impact equipment, if filter core precision is too high except cost height, can back pressure be produced, oil circuit be run not smooth; What filter core can not do on the other hand is too large, and its pollutant holding capability is limited, and filter core cannot remove moisture in addition.
[summary of the invention]
The object of the invention is to filter by paper filter core to solve existing filtration device, filter core limited precision and cannot solve problem and the back pressure problems of moisture contamination, provides a kind of and ensures that hydraulic oil or lubricant oil are in clean state for a long time, reduce the electronic filtering apparatus of oil change frequency, the associated hydraulic not producing back pressure and lubricating area oil product.
To achieve these goals, the electronic filtering apparatus of a kind of associated hydraulic and lubricating area oil product is provided, comprise pump 2, control system 8, high pressure electrostatic generator 9, electronics filter element device 5, high-density fiber water suction filtrating equipment 3, pressure transducer 10, moisture transducer 7, fuel tank oil drain out pipeline 1 connects the entrance point of high-density fiber water suction filter element device 3 by pump 2 one tunnel, high-density fiber water suction filtration core device 3 connects the entrance point in the left side of high-pressure electronic filter element device 5 by solenoid valve 4 one tunnel, outlet end on the right side of high-pressure electronic filter element device 5 connects hydraulic reservoir inlet tube 6, another road pipeline of solenoid valve 4 is connected on the oil drain out pipeline of pump 2, control system 8 is by signaling line control pump 2, solenoid valve 4, high pressure electrostatic generator 9, moisture transducer 7, pressure transducer 10 control apparatus runs, produce high-pressure electrostatic by high pressure electrostatic generator 9 and send high-pressure electronic filter element device 5 to, make in high-pressure electronic filter element device 5, to produce the positive negative electric field of high pressure.
Fuel tank oil drain out pipeline 1 connects the entrance point of high-density fiber water suction filter element device 3 by pump 2 one tunnel, high-density fiber water suction filtration core device 3 is by solenoid valve 4, the entrance point in the left side connecting high-pressure electronic filter element device 5 is directly entered when moisture content is less than 250ppm, outlet end on the right side of high-pressure electronic filter element device 5 connects hydraulic reservoir inlet tube 6, when moisture content is greater than in 250ppm, another road pipeline of solenoid valve 4 is connected to the entrance point of high-density fiber water suction filter element device 3.
High-density fiber water suction filter element device 3 adopts terraced layered structure.
High-density fiber water suction filter element device 3 upper entrance end is provided with moisture transducer 7.
The electrode collector that high-pressure electronic filter element device 5 top enters chamber inlet end is provided with pressure transducer 10.
The method of the filtrating equipment of a kind of associated hydraulic and lubricating area, the method is: utilize high-voltage electrostatic field, make particulate pollutant polarization in oil and just show respectively, electronegativity, band just, electronegative particulate matter under the effect of ultrahigh pressure electric field respectively towards negative, positive electrode direction is moved about, neutrophil granule is squeezed movement by charged particle logistics, finally all particulates is all adsorbed on the electrode collector depended in high-pressure electronic filter element device 5, pollutant in thorough removing oil product, its filter precision can reach 0.02 μm, turbidity test can reach more than NAS3 level, comprise the following steps:
A. high density water suction filter element device 3: pick out bypass from tank bottoms oil drain out, hydraulic oil in fuel tank is pumped into high-density fiber water suction filter core by high pressure oil pump, high-density fiber water suction filter core is converted into by high density water-absorption fiber, there is strongly hydrophilic, water absorption rate reaches more than 50 times, to be absorbed water filter core by high-density fiber, moisture in oil product can be reduced to below 500ppm, through moisture detection, as do not reached below 500ppm, return water suction entrance drainage again, until reach below 500ppm, enter high-pressure electronic filter element device 5;
B. high-pressure electronic filter element device: be provided with Electrostatic Absorption filter core in device, Electrostatic Absorption filter core is the composite material that metal aluminum foil and parchment paper bond, high-pressure electrostatic is produced by high pressure electrostatic generator, high-pressure electrostatic and aluminium foil are connected, make to form high-voltage electrostatic field between filter core space, oil product passes through from filter core space, particulate matter in oil product polarizes and just shows respectively under high voltage electrostatic field, electronegativity, band just, electronegative particulate matter under the effect of ultrahigh pressure electric field respectively towards negative, positive electrode direction is moved about, neutrophil granule is squeezed movement by charged particle logistics, finally all being adsorbed on by all particulates depends on the parchment paper of foil electrode, the absolute oil of removing particulate matter is back to equipment fuel tank,
C. circulate dialysis: along with equipment constantly runs, and high-pressure electronic filter is also in continuous operation, and the pollutant in oil product is constantly adsorbed, oil product in fuel tank becomes clean gradually, finally remain on clean state, as long as there is particulate matter to produce, will soon be adsorbed;
D. oil circuit cleaning: be back in the oil product of fuel tank and have fraction not by the charged particle thing adsorbed, these particulate matters run access arrangement oil circuit with equipment, pollutant in equipment oil circuit can be adsorbed in the middle of oil product in running in equipment oil circuit and be back to fuel tank, the particulate matter entering fuel tank repeatedly circulates through high-pressure electronic filter and rejects gradually.
The high-pressure electrostatic that described high pressure electrostatic generator produces is 50000V.
Compared with the existing technology, its advantage is in the present invention:
1, high-density fiber water suction filter element device and high-pressure electronic filter core have been installed, can be directly installed in the bypass of equipment fuel tank, disposable moisture in oil product and the pollutant of going out, greatly reduce oil change frequency, save equipment use cost, can reduce by the use oil of about 90%, for enterprise reduces cost, increase profit, hydraulic pressure oil product can reuse, and realizes recycling economy;
2, reduce equipment failure rate, save maintenance cost, equipment is in clean state for a long time, and frictional resistance is little, uniform force, hydraulic component frictional resistance is little, and infringement probability reduces greatly, major part fault is eliminated automatically, and the rate of fault of equipment reduces, and maintenance cost also reduces naturally;
3, reduce maintenance number of times, improve equipment operation rate; Hydraulic system does not need to maintain again, and the original filter core of system can become clean gradually, does not need to change again, because maintenance frequency and maintenance number of times reduce, and the corresponding raising of Homes Using TV; And do not need to waste the extensive work time because of maintenance, simultaneously uniform force, working state are not only steady but also accurate, and working efficiency is high, can improve 20%-30%;
4, extension device working life, not only by clean for oil product process, by oil product circulation, the pollutant in shield structure is adsorbed simultaneously, and process is clean, equipment is in clean state for a long time, and uniform force is stablized, its core component improves working life greatly, and then improve the working life of equipment, the equipment of maintenance steady in a long-term is far longer than the working life of equipment under befouling environment its working life, and working life can extend more than 30%;
5, reduce machine utilization, reduce equipment energy consumption; Due to the cleaning of oil product and oil circuit, equipment top layer flat smooth, high lubricating effect, frictional resistance is little, and the load of equipment reduces, the corresponding minimizing of its energy consumption, and energy consumption reduces 8%-20%;
6, on-line automatic operation is realized, on-line monitoring; Do not need manual operation, can automatically open when oil pollution, automatic shutdown when oil product is clean, can select to be arranged on line detection facility, implements the using state understanding oil product;
7, decreasing pollution thing discharge, Green environmental protection equipment; Often save one ton of oil and be equivalent to minimizing 0.5 ton of CO2 emission, while a large amount of minimizing fresh oil uses, decrease the discharge of waste oil.
[accompanying drawing explanation]
The structural drawing of Fig. 1 apparatus of the present invention;
In figure: 1. hydraulic reservoir oil drain out 2. pump 3. high-density fiber water suction filter element device 4. vacuum breaker 5. high-pressure electronic filter element device 6. hydraulic reservoir filler opening 7. moisture transducer 8. control system 9. high pressure electrostatic generator 10. pressure transducer;
[embodiment]
Below in conjunction with accompanying drawing, the invention will be further described, and the structure of this device and principle are very clearly concerning the people of this specialty.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
Embodiment 1
Be illustrated in figure 1 structure drawing of device of the present invention, comprise pump 2, control system 8, high pressure electrostatic generator 9, electronics filter element device 5, high-density fiber water suction filtrating equipment 3, pressure transducer 10, moisture transducer 7, fuel tank oil drain out pipeline 1 connects the entrance point of high-density fiber water suction filter element device 3 by pump 2 one tunnel, high-density fiber water suction filtration core device 3 connects the entrance point in the left side of high-pressure electronic filter element device 5 by solenoid valve 4 one tunnel, outlet end on the right side of high-pressure electronic filter element device 5 connects hydraulic reservoir inlet tube 6, another road pipeline of solenoid valve 4 is connected on the oil drain out pipeline of pump 2, control system 8 is by signaling line control pump 2, solenoid valve 4, high pressure electrostatic generator 9, moisture transducer 7, pressure transducer 10 control apparatus runs, produce high-pressure electrostatic by high pressure electrostatic generator 9 and send high-pressure electronic filter element device 5 to, make in high-pressure electronic filter element device 5, to produce the positive negative electric field of high pressure.Under extra-high voltage field action, particulate pollutant in oil is moved respectively towards negative, positive electrode direction, thoroughly remove the pollutant in oil product, filter precision reaches 0.02 μm, and turbidity test reach more than NAS3 level.
This device installs water suction filter core, effectively can draw the moisture in oil product, accumulator pressure sensor has been installed, understand contaminant collector replacing construction, the supervisory systems such as oil-feed flow, fuel-displaced flow, oil product temperature, the display of high-pressure electrostatic voltage, the display of high-pressure electrostatic leakage current are also installed simultaneously, the using state of hydraulic oil can be understood the moment.
This device utilizes high-voltage electrostatic field, make particulate pollutant polarization in oil and show electrically positive and negative respectively, move about respectively towards negative, positive electrode direction under the effect of ultrahigh pressure electric field with positive and negative electrical particulate matter, neutrophil granule is squeezed movement by charged particle logistics, finally all particulates is all adsorbed on the electrode collector depended in high-pressure electronic filter element device 5, pollutant in thorough removing oil product, its filter precision can reach 0.02 μm, turbidity test can reach more than NAS3 level, comprise the following steps:
A. high density water suction filter element device 3: pick out bypass from tank bottoms oil drain out, hydraulic oil in fuel tank is pumped into high-density fiber water suction filter core by high pressure oil pump, high-density fiber water suction filter core is converted into by high density water-absorption fiber, there is strongly hydrophilic, water absorption rate reaches more than 50 times, to be absorbed water filter core by high-density fiber, moisture in oil product can be reduced to below 250ppm, through moisture detection, as do not reached below 250ppm, return water suction entrance drainage again, until reach below 250ppm, enter high-pressure electronic filter element device 5;
B. high-pressure electronic filter element device: be provided with Electrostatic Absorption filter core in device, Electrostatic Absorption filter core is the composite material that metal aluminum foil and parchment paper bond, high-pressure electrostatic is produced by high pressure electrostatic generator, high-pressure electrostatic and aluminium foil are connected, make to form high-voltage electrostatic field between filter core space, oil product passes through from filter core space, particulate matter in oil product polarizes and just shows respectively under high voltage electrostatic field, electronegativity, band just, electronegative particulate matter under the effect of ultrahigh pressure electric field respectively towards negative, positive electrode direction is moved about, neutrophil granule is squeezed movement by charged particle logistics, finally all being adsorbed on by all particulates depends on the parchment paper of foil electrode, the absolute oil of removing particulate matter is back to equipment fuel tank,
C. circulate dialysis: along with equipment constantly runs, and high-pressure electronic filter is also in continuous operation, and the pollutant in oil product is constantly adsorbed, oil product in fuel tank becomes clean gradually, finally remain on clean state, as long as there is particulate matter to produce, will soon be adsorbed;
D. oil circuit cleaning: be back in the oil product of fuel tank and have fraction not by the charged particle thing adsorbed, these particulate matters run access arrangement oil circuit with equipment, pollutant in equipment oil circuit can be adsorbed in the middle of oil product in running in equipment oil circuit and be back to fuel tank, the particulate matter entering fuel tank repeatedly circulates through high-pressure electronic filter and rejects gradually.The high-pressure electrostatic that high pressure electrostatic generator produces is 50000V.
Embodiment 2
The solid foundation company in Shanghai, in June, 2012, its 800 tons of static pressure pile foundations installed this device, its hydraulic oil is reduced to NAS7 level from NAS10 level, and be stabilized in NAS7 level, originally the oil product at once changed is needed to use so far, use hydraulic system one year over not occur any fault, manufacturing efficiency improves greatly, and whole equipment reaches the effect of new equipment.
Claims (6)
1. the electronic filtering apparatus of an associated hydraulic and lubricating area oil product, comprise pump (2), control system (8), high pressure electrostatic generator (9), electronics filter element device (5), high-density fiber water suction filter element device (3), pressure transducer (10), moisture transducer (7), it is characterized in that fuel tank oil drain out pipeline (1) connects the entrance point of high-density fiber water suction filter element device (3) by pump (2) tunnel, high-density fiber water suction filter element device (3) connects the entrance point in the left side of high-pressure electronic filter element device (5) by solenoid valve (4) tunnel, the outlet end on high-pressure electronic filter element device (5) right side connects hydraulic reservoir inlet tube (6), another road pipeline of solenoid valve (4) is connected on the oil drain out pipeline of pump (2), control system (8) is by signaling line control pump (2), solenoid valve (4), high pressure electrostatic generator (9), moisture transducer (7), pressure transducer (10) control apparatus runs, produce high-pressure electrostatic by high pressure electrostatic generator (9) and send high-pressure electronic filter element device (5) to, make to produce the positive negative electric field of high pressure in high-pressure electronic filter element device (5).
2. the electronic filtering apparatus of a kind of associated hydraulic as claimed in claim 1 and lubricating area oil product, is characterized in that high-density fiber water suction filter element device (3) adopts terraced layered structure.
3. the electronic filtering apparatus of a kind of associated hydraulic as claimed in claim 1 and lubricating area oil product, is characterized in that high-density fiber water suction filter element device (3) upper entrance end is provided with moisture transducer (7).
4. the electronic filtering apparatus of a kind of associated hydraulic as claimed in claim 1 and lubricating area oil product, is characterized in that the electrode collector that high-pressure electronic filter element device (5) top enters chamber inlet end is provided with pressure transducer (10).
5. the method for the filtrating equipment of an associated hydraulic and lubricating area, it is characterized in that the method is: utilize high-voltage electrostatic field, make particulate pollutant polarization in oil and just show respectively, electronegativity, band just, electronegative particulate matter under the effect of ultrahigh pressure electric field respectively towards negative, positive electrode direction is moved about, neutrophil granule is squeezed movement by charged particle logistics, finally all particulates is all adsorbed on the electrode collector depended in high-pressure electronic filter element device (5), pollutant in thorough removing oil product, its filter precision can reach 0.02 μm, turbidity test can reach more than NAS3 level, comprise the following steps:
A. high density water suction filter element device (3): pick out bypass from tank bottoms oil drain out, hydraulic oil in fuel tank is pumped into high-density fiber water suction filter core by high pressure oil pump, high-density fiber water suction filter core is converted into by high density water-absorption fiber, there is strongly hydrophilic, water absorption rate reaches more than 50 times, to be absorbed water filter core by high-density fiber, moisture in oil product can be reduced to below 500ppm, through moisture detection, as do not reached below 500ppm, return water suction entrance drainage again, until reach below 500ppm, enter high-pressure electronic filter element device (5);
B. high-pressure electronic filter element device: be provided with Electrostatic Absorption filter core in device, Electrostatic Absorption filter core is the composite material that metal aluminum foil and parchment paper bond, high-pressure electrostatic is produced by high pressure electrostatic generator, high-pressure electrostatic and aluminium foil are connected, make to form high-voltage electrostatic field between filter core space, oil product passes through from filter core space, particulate matter in oil product polarizes and just shows respectively under high voltage electrostatic field, electronegativity, band just, electronegative particulate matter under the effect of ultrahigh pressure electric field respectively towards negative, positive electrode direction is moved about, neutrophil granule is squeezed movement by charged particle logistics, finally all being adsorbed on by all particulates depends on the parchment paper of foil electrode, the absolute oil of removing particulate matter is back to equipment fuel tank,
C. circulate dialysis: along with equipment constantly runs, and high-pressure electronic filter is also in continuous operation, and the pollutant in oil product is constantly adsorbed, oil product in fuel tank becomes clean gradually, finally remain on clean state, as long as there is particulate matter to produce, will soon be adsorbed;
D. oil circuit cleaning: be back in the oil product of fuel tank and have fraction not by the charged particle thing adsorbed, these particulate matters run access arrangement oil circuit with equipment, pollutant in equipment oil circuit can be adsorbed in the middle of oil product in running in equipment oil circuit and be back to fuel tank, the particulate matter entering fuel tank repeatedly circulates through high-pressure electronic filter and rejects gradually.
6. the method for the filtrating equipment of a kind of associated hydraulic as claimed in claim 5 and lubricating area, is characterized in that the high-pressure electrostatic that described high pressure electrostatic generator produces is 50000V.
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| CN106090590A (en) * | 2016-07-28 | 2016-11-09 | 山东源根化学技术研发有限公司 | Safe efficient type paper machine lubricating circulatory system |
| CN108593369A (en) * | 2018-06-14 | 2018-09-28 | 天津大学 | A kind of device that high-precision oil mist particles measure simultaneously with gaseous pollutant concentration |
| CN113975856B (en) * | 2021-10-26 | 2022-11-04 | 国网山东省电力公司济宁供电公司 | A built-in insulating oil intelligent purification device, method and high-voltage cable oil-filled terminal |
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- 2014-02-24 CN CN201410063004.4A patent/CN103807250B/en not_active Expired - Fee Related
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN85109568A (en) * | 1985-12-26 | 1987-07-01 | 中国人民解放军工程兵工程学院野战工程系工程机械教研室 | Purification mechanism and structure of multi-mechanism high-precision oil purifier |
| DE202004015491U1 (en) * | 2004-01-29 | 2004-12-16 | Hydac Filtertechnik Gmbh | Measurement of the level of dirtiness of a filter in a fluid, especially hydraulic fluid, circuit, whereby filtered and unfiltered fluid are connected to a differential pressure transducer that is linked to evaluation electronics |
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