CN201407228Y - Magnetostrictive displacement transducer hydraulic cylinder - Google Patents
Magnetostrictive displacement transducer hydraulic cylinder Download PDFInfo
- Publication number
- CN201407228Y CN201407228Y CN2009200581447U CN200920058144U CN201407228Y CN 201407228 Y CN201407228 Y CN 201407228Y CN 2009200581447 U CN2009200581447 U CN 2009200581447U CN 200920058144 U CN200920058144 U CN 200920058144U CN 201407228 Y CN201407228 Y CN 201407228Y
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- China
- Prior art keywords
- magnetostrictive displacement
- hydraulic cylinder
- magnetostrictive
- displacement transducer
- displacement sensor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- 238000006073 displacement reaction Methods 0.000 title claims abstract description 48
- 238000012545 processing Methods 0.000 claims abstract description 8
- 239000003566 sealing material Substances 0.000 claims abstract description 8
- 229910052731 fluorine Inorganic materials 0.000 claims description 10
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 claims description 9
- 229920001971 elastomer Polymers 0.000 claims description 9
- 239000011737 fluorine Substances 0.000 claims description 9
- 238000005516 engineering process Methods 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 238000007789 sealing Methods 0.000 abstract description 12
- 239000013535 sea water Substances 0.000 abstract description 5
- 229920001343 polytetrafluoroethylene Polymers 0.000 abstract description 4
- 239000004810 polytetrafluoroethylene Substances 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract description 3
- 238000002156 mixing Methods 0.000 abstract description 3
- -1 polytetrafluoroethylene Polymers 0.000 abstract description 3
- 229920001973 fluoroelastomer Polymers 0.000 abstract description 2
- 238000012423 maintenance Methods 0.000 abstract description 2
- 230000001681 protective effect Effects 0.000 abstract 1
- 239000000463 material Substances 0.000 description 14
- 230000005291 magnetic effect Effects 0.000 description 6
- 239000004809 Teflon Substances 0.000 description 5
- 229920006362 Teflon® Polymers 0.000 description 5
- 238000005260 corrosion Methods 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 4
- 230000005381 magnetic domain Effects 0.000 description 4
- 230000005415 magnetization Effects 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 230000005294 ferromagnetic effect Effects 0.000 description 2
- 230000008676 import Effects 0.000 description 2
- 229910052761 rare earth metal Inorganic materials 0.000 description 2
- 150000002910 rare earth metals Chemical class 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 229920006169 Perfluoroelastomer Polymers 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000002902 ferrimagnetic material Substances 0.000 description 1
- 239000003302 ferromagnetic material Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
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- 230000002269 spontaneous effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
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Abstract
The utility model relates to a magnetostrictive displacement transducer hydraulic cylinder in accessories of a mechanical excavator of civil engineering, which consists of a hydraulic cylinder and a magnetostrictive displacement transducer. The magnetostrictive displacement transducer comprises a magnetostrictive waveguide tube, a protective sleeve, a transducer and a permanent magnet, wherein thetransducer is connected to a signal processing circuit interface, sealing rings of joints of the hydraulic cylinder and the magnetostrictive displacement transducer utilize sealing materials manufactured by blending technique of fluororubber and polytetrafluoroethylene and adopt an IP68 waterproof joint and a vulcanized joint, and can bear pressure over 25Mpa, thereby resolving the problem that seal of magnetostrictive displacement transducer hydraulic cylinders is easy to be corroded by sea water. In addition, by utilizing the magnetostrictive displacement transducer to replace a common linear displacement sensor, the magnetostrictive displacement transducer hydraulic cylinder has fine pollution resistance, is easy in maintenance, and can bear high-temperature, high-voltage and high-oscillation environments.
Description
Technical field
The accessory oil hydraulic cylinder that the utility model relates in the civil engineering cable operated excavator is made the field, specifically is meant the magnetostrictive displacement sensor oil hydraulic cylinder.
Background technique
Oil hydraulic cylinder is a hydraulic jack, extensively is used in civil engineering machineries such as dredge, excavator, loader, road roller.At present the enterprise of leading domestic civil engineering machinery support hydraulic pressure Component be Bosch BOSCH-REXROTH, the Japan of Germany KYB, Kawasaki, onlyly get over, enterprise such as Toshiba, the oil hydraulic cylinder that they produce can bear pressure all more than 50Mpa, it is 16Mpa that the oil hydraulic cylinder that China enterprise produces can bear pressure, producing the above high pressure liquid cylinder pressure of 28Mpa pressure all fails to reach a standard, crucial problem is, when using in the ocean, the problem of seawater corrosion sealing can't resolve, and can only all use import parts.
Magnetostrictive displacement sensor is a kind of novel sensor of accurate mensuration displacement amount; comprise the magnetostrictive waveguide pipe; protecting jacket; sensor; permanent magnet; sensor connects signal processing circuit; it detects principle; when the magnetostrictive waveguide pipe passes to of short duration impulsive current; around it, produce Circumferential field; under the acting in conjunction in the magnetic field of permanent magnet; near permanent magnet, will produce torsion type elastic wave; elastic wave is propagated along the magnetostrictive waveguide pipe; when arriving sensor; in sensor, produce induction electromotive force; after the signal processing circuit processing and calculating; can draw elastic wave and propagate into the used time of sensor from permanent magnet; because the elasticity velocity of wave propagation is the fixed amount relevant with the material of magnetostrictive waveguide pipe, thereby can accurately determine the position at permanent magnet place and the relative displacement after the change in location.
At present, in the electro-hydraulic servo control cylinder device, often the linear movement pick-up that uses has inductive type, potentiometer-type, capacitor type etc., and its care and maintenance is difficulty very, and especially in rugged environment, sensor is subject to the pollution of grease, solution, dust etc.And band magnetostrictive displacement sensor oil hydraulic cylinder adopts non-contact technology, and promptly monitored permanent magnet does not directly contact with sensor, and antipollution is good, for ease of maintenaince, can bear the environment of high temperature, high pressure and high vibration.
Magneto-striction phenomenon and magnetostriction materials: material has the phenomenon of expanding with heat and contract with cold as you know, and magnetic field and electric field also can cause the elongation and the shortening of dimension of object.Under the effect of ferromagnetic substance outside magnetic field, the elongation of its size, remove magnetic field after, recover the original length again.This phenomenon is called magneto-striction phenomenon again.The mechanism of this phenomenon is: spontaneous magnetization takes place in ferromagnetic or ferrimagnetic material below curie temperature, forms magnetic domain.In each magnetic domain, lattice is all along magnetization direction generation deformation.When applying external magnetic field, the magnetic domain that material internal is orientated immediately rotates, and each magnetic domain direction of magnetization reaches unanimity, and the macroeffect that object externally shows promptly elongates or shortens along magnetic direction.
Magnetostriction materials mainly contain three major types: the one, and magnetostriction metal or its alloy, the 2nd, ferrite mangneto telescopic material, the 3rd, the rare earth metal of immediate development or its compound, claim rare earth ultra-magnetostriction material, it is the material that can improve a national competitiveness, is strategic functional material of 21st century.
The applicant once entrusted Guangdong Science and Technology Information Inst., at home to the magnetostrictive displacement sensor oil hydraulic cylinder, carried out scientific and technological update search, report number: 20082478, and document and conclusion that retrieval is come out are as follows:
Document 1: seal arrangement, number of patent application: 88101275, publication number: CN88101275, claimant: U.S. Arrow Oil Tool, Ltd..Literal sense has been reported a kind of seal arrangement, and each black box comprises five lip rings, and outmost is metal washer, it between the packing ring FFKM Sealing, a teflon seal and a metal knitted net Sealing, it is used for eliminating the extruding of other Sealing.
Document 2: a kind of novel plunger seal circle that is used for the ultrahigh pressure drilling mud pump, application number: 200720079915.1, publication number; CN201047346, claimant: Southwest Petrol University.Literal sense has been reported a kind of novel plunger seal circle that is used for the ultrahigh pressure drilling mud pump.Seal ring adopts lining cloth fluoro rubber, two kinds of materials of filled polytetrafluoroethylene to make, and mutual permutation and combination is used together.
Document 3: have the Gas-combustion valve of composite soft sealing structure, application number: 200720101963.6, publication number: CN201068998, claimant: Yangquan Valves Co., Ltd..Literal sense has been reported a kind of Gas-combustion valve with composite soft sealing structure.Inlay the teflon pad on the flashboard sealing surface, have groove on the teflon pad, the embedded intrinsic fluorine rubber pad of groove.
Document 4: band magnetostrictive displacement sensor oil hydraulic cylinder, author: Yan Jinkun is published in " hydropneumatic and sealing " 2003-3, introduces the structural feature of band magnetostrictive displacement sensor oil hydraulic cylinder.Analysis has illustrated the working principle and the performance of magnetostrictive displacement sensor.
Document 5: the application of single-chip microcomputer in big magnetostriction highi degree of accuracy electricity feedback synchronous valve, author: Hao Yanwen etc., be published in " Gansu Polytechnical Univ's journal " 2002-28, a kind of new-type functional material is adopted in design, it is magnetostriction material in large, as the motor conversion element of valve, and adopt 8051 single-chip microcomputer collections and the Displacement Feedback signal of handling two oil hydraulic cylinders, thereby reach high-precise synchronization control.
Conclusion: domestic relevant for fluorine rubber and two kinds of materials of teflon are used for the report of sealing configuration, do not adopt fluorine rubber and the polytetrafluoroethylblended blended report of making sealing material but see.The report of domestic useful Single-chip Controlling magnetostrictive high precision electricity feedback synchronous valve, but do not see the report of " adopt the IP68 water joint to add vulcanized joint and add that blending technology produces into the material of main part of sealing, solve the problem of oil hydraulic cylinder magnetostrictive displacement sensor seawater corrosion sealing when deep ocean work ".In above-mentioned range of search, do not see domestic document, patent and the achievement report that " magnetostrictive displacement sensor oil hydraulic cylinder " identical with technical parameter with the above-mentioned technical characterstic of this authorized item arranged.
The model utility content
Poor for the hydraulic cylinder sealing material that solves the prior art existence, it is low to bear pressure, is subjected to the seawater corrosion problem easily, the utility model proposes a kind of supporting magnetostrictive displacement sensor oil hydraulic cylinder that can high bear the hydraulic cylinder sealing material of pressure.
The technological scheme that the utility model uses is as follows:
A kind of magnetostrictive displacement sensor oil hydraulic cylinder; mainly form by hydraulic jack and magnetostrictive displacement sensor; described magnetostrictive displacement sensor comprises magnetostrictive waveguide pipe, protecting jacket, sensor, permanent magnet; sensor connects the signal processing circuit interface; the seal ring of described hydraulic jack and magnetostrictive displacement sensor joint, the sealing material that adopts fluorine rubber and polytetrafluoroethylblended blended technology to make.
The joint of described hydraulic jack and magnetostrictive displacement sensor adopts the IP68 water joint to add vulcanized joint; Magnetostrictive displacement sensor is built-in to be installed among the hydraulic jack.
The beneficial effects of the utility model are:
1) sealing material that uses fluorine rubber and polytetrafluoroethylblended blended technology to make replaces traditional fluorine rubber or teflon as seal ring, can bear the above pressure of 25Mpa, reaches as high as 31.5Mpa, import substitutes.
2) adopt non-contacting magnetostrictive displacement sensor to substitute common linear movement pick-up, antipollution is good, for ease of maintenaince, can bear the environment of high temperature, high pressure and high vibration.
3) use the IP68 water joint to add vulcanized joint, add the seal ring that fluorine rubber and polytetrafluoroethylblended blended technology are made, solved the magnetostrictive displacement sensor oil hydraulic cylinder problem that seawater corrosion seals when deep ocean work, can be in the deep-sea of 40M proper functioning.
Description of drawings
Fig. 1 is the utility model magnetostrictive displacement sensor oil hydraulic cylinder schematic representation.
1-cylinder body among the figure, 2-piston, 3-permanent magnet, 4-protecting jacket, 5-seal ring; the 6-sensor, 7-hydraulic fluid port, 8-signal processing circuit interface, 9-cable shield tube, 10-bleed valve; the 11-connector lug, 12-magnetostrictive waveguide pipe, 13--IP68 water joint, 14--piston flexible rod connecting head.
Embodiment
Fig. 1 is the utility model magnetostrictive displacement sensor oil hydraulic cylinder schematic representation.Mainly form by hydraulic jack 1 and magnetostrictive displacement sensor; magnetostrictive displacement sensor comprises magnetostrictive waveguide pipe 12, protecting jacket 4, sensor 6, permanent magnet 3; sensor 6 connects signal processing circuit interface 8; the seal ring 5 of hydraulic jack 1 and magnetostrictive displacement sensor 6 joints, the sealing material that adopts fluorine rubber (FKM) and polytetrafluoroethylene (PTFE) blending technology to make.
The joint of described hydraulic jack and magnetostrictive displacement sensor adopts the IP68 water joint to add vulcanized joint, and magnetostrictive displacement sensor is built-in to be installed among the hydraulic jack.
Magnetostrictive displacement sensor is rigidly connected to an end of the no piston flexible rod of oil hydraulic cylinder 1, and finishes total travel length in box type piston 2, and permanent magnet 3 is made ring shape, is installed in the end of piston 2; Magnetostrictive waveguide pipe 12 and protecting jacket 4 thereof pass the center of ring shape permanent magnet 3.When piston 2 during along stroke motion, sensor 6 is measured the position at piston 2 places that connect permanent magnet 3 by the magnetostrictive waveguide pipe 12 in the protecting jacket 4.
The utility model adopts the module assembling, realizes the steady uniform motion of oil hydraulic cylinder, eliminates creeping phenomenon, and it is very simple that magnetostrictive displacement sensor is changed at the scene, need not remove hydraulic pressure earlier, and process is quick, lowers the off-time greatly.
The utility model is applied to the supporting of main frames such as deep ocean work dredger, excavator, loader, road roller, mining machinery.
Technical parameter of the present utility model:
Nonlinearity erron:＜± 80 μ m.
Repeatability error:＜± 2.5 μ m.
Zero point scope: 100%F, S.
The working pressure of oil hydraulic cylinder: 25Mpa, maximum pressure: 31.5Mpa
Working environment: in the ocean depth 40M.
Claims (3)
1, a kind of magnetostrictive displacement sensor oil hydraulic cylinder; mainly form by hydraulic jack and magnetostrictive displacement sensor; described magnetostrictive displacement sensor comprises magnetostrictive waveguide pipe (12), protecting jacket (4), sensor (6), permanent magnet (3); sensor (6) connects signal processing circuit interface (8); it is characterized in that: the seal ring (5) of described hydraulic jack and magnetostrictive displacement sensor joint, the sealing material that adopts fluorine rubber and polytetrafluoroethylblended blended technology to make.
2, a kind of magnetostrictive displacement sensor oil hydraulic cylinder according to claim 1 is characterized in that: the joint of described hydraulic jack and magnetostrictive displacement sensor adopts IP68 water joint (13) to add vulcanized joint.
3, a kind of magnetostrictive displacement sensor oil hydraulic cylinder according to claim 1, it is characterized in that: magnetostrictive displacement sensor is built-in to be installed among the hydraulic jack.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200581447U CN201407228Y (en) | 2009-06-05 | 2009-06-05 | Magnetostrictive displacement transducer hydraulic cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200581447U CN201407228Y (en) | 2009-06-05 | 2009-06-05 | Magnetostrictive displacement transducer hydraulic cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201407228Y true CN201407228Y (en) | 2010-02-17 |
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ID=41678162
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200581447U Expired - Fee Related CN201407228Y (en) | 2009-06-05 | 2009-06-05 | Magnetostrictive displacement transducer hydraulic cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201407228Y (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102927892A (en) * | 2012-10-18 | 2013-02-13 | 鞍山维盛自动化科技有限公司 | Position detection system with auxiliary cylinder |
| CN103708357A (en) * | 2014-01-03 | 2014-04-09 | 资阳市福兴自动化机械有限公司 | Setting machine of electro-hydraulic servo hydraulic cylinder |
| CN104101371A (en) * | 2014-07-11 | 2014-10-15 | 西安电子科技大学 | Small fully-automatic multistage rapid telescopic link device |
| US9074860B2 (en) | 2013-03-13 | 2015-07-07 | Ametek | Systems and methods for magnetostrictive sensing |
| CN105674867A (en) * | 2016-01-21 | 2016-06-15 | 中国石油大学(北京) | Sealing device and method of magnetic induced shrinkage or elongation displacement sensor for underwater high pressure |
| CN105840579A (en) * | 2015-02-04 | 2016-08-10 | 舍弗勒技术股份两合公司 | Fluid handling device |
| CN110411328A (en) * | 2019-08-13 | 2019-11-05 | 上海交通大学 | Magnetostrictive displacement sensor |
-
2009
- 2009-06-05 CN CN2009200581447U patent/CN201407228Y/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102927892A (en) * | 2012-10-18 | 2013-02-13 | 鞍山维盛自动化科技有限公司 | Position detection system with auxiliary cylinder |
| US9074860B2 (en) | 2013-03-13 | 2015-07-07 | Ametek | Systems and methods for magnetostrictive sensing |
| CN103708357A (en) * | 2014-01-03 | 2014-04-09 | 资阳市福兴自动化机械有限公司 | Setting machine of electro-hydraulic servo hydraulic cylinder |
| CN104101371A (en) * | 2014-07-11 | 2014-10-15 | 西安电子科技大学 | Small fully-automatic multistage rapid telescopic link device |
| CN104101371B (en) * | 2014-07-11 | 2016-04-20 | 西安电子科技大学 | The multistage quick-expansion lever apparatus of a kind of small size automatic |
| CN105840579A (en) * | 2015-02-04 | 2016-08-10 | 舍弗勒技术股份两合公司 | Fluid handling device |
| CN105674867A (en) * | 2016-01-21 | 2016-06-15 | 中国石油大学(北京) | Sealing device and method of magnetic induced shrinkage or elongation displacement sensor for underwater high pressure |
| CN105674867B (en) * | 2016-01-21 | 2019-03-29 | 中国石油大学(北京) | A kind of high undersea hydrostatic pressures magnetostrictive displacement sensor sealing device |
| CN110411328A (en) * | 2019-08-13 | 2019-11-05 | 上海交通大学 | Magnetostrictive displacement sensor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100217 Termination date: 20120605 |