EP2552590A1 - Dispositif et procede de recuperation de particules magnetiques piegees sur un bouchon magnetique - Google Patents
Dispositif et procede de recuperation de particules magnetiques piegees sur un bouchon magnetiqueInfo
- Publication number
- EP2552590A1 EP2552590A1 EP11715956A EP11715956A EP2552590A1 EP 2552590 A1 EP2552590 A1 EP 2552590A1 EP 11715956 A EP11715956 A EP 11715956A EP 11715956 A EP11715956 A EP 11715956A EP 2552590 A1 EP2552590 A1 EP 2552590A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- tube
- magnetic
- cap
- magnetic bar
- bar
- 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.)
- Granted
Links
Classifications
-
- 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
- B03C1/025—High gradient magnetic separators
- B03C1/031—Component parts; Auxiliary operations
- B03C1/032—Matrix cleaning systems
-
- 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
- B03C1/28—Magnetic plugs and dipsticks
- B03C1/286—Magnetic plugs and dipsticks disposed at the inner circumference of a recipient, e.g. magnetic drain bolt
-
- 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
- B03C2201/00—Details of magnetic or electrostatic separation
- B03C2201/18—Magnetic separation whereby the particles are suspended in a liquid
-
- 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
- B03C2201/00—Details of magnetic or electrostatic separation
- B03C2201/28—Parts being designed to be removed for cleaning purposes
Definitions
- the invention relates to a device and a method for recovering magnetic particles trapped on a magnetic plug for retaining, by means of a magnet, the magnetic particles entrained by a liquid and resulting from the wear of parts, such as for example rotating parts arranged in an aircraft equipment or engine casing.
- a magnetic plug is placed in a moving liquid circuit (typically oil, coolant or fuel) inside a casing containing moving parts, such as gears. or bearings, which bathe in said liquid.
- a moving liquid circuit typically oil, coolant or fuel
- moving parts such as gears. or bearings, which bathe in said liquid.
- the function of the liquid circuit is to allow the lubrication and / or cooling of moving parts (typically rotating parts). It turns out that the moving parts are worn during their lifetime, for example because of the friction resulting from contact between two gears or bearings, or because of shocks or intense friction between rotating parts due to intense and abnormal vibrations propagating in the crankcase. Whatever its cause, the wear of the parts causes the formation of particles that are detached from the parts and are entrained by the liquid in the liquid circuit. Since the rotating parts are generally metallic, the particles resulting from wear of the parts are conductive and are generally in the form of filings.
- a magnetic plug 1 comprises at one end a head or support 2 and a permanent magnet formed by a magnetic bar 3 immersed in the liquid circuit, said bar 3 attracting the metal particles 20 during the circulation of the liquid.
- the operators on site must then periodically check during the ground maintenance operations the presence of particles on these magnetic plugs, collect the particles trapped on the magnetic bar and have them analyzed, for example by SEM scanning electron microscopy type analyzes and EDS spectroscopy ("energy dispersive spectroscopy"). From these analyzes, it is possible to identify the nature and geometry of the particles collected. Depending on the position of the plug in the circuit, it can then circumscribe the element or elements affected by wear and take measures that will ensure the integrity of the machine and flight safety. Various techniques are known that allow the operators to collect the particles trapped on the magnetic plug.
- a first technique is to use an adhesive tape that the operator puts in contact with the magnetic bar of the plug.
- Such a solution is not entirely satisfactory in that the particles remain adhered to the adhesive and are difficult to separate (by dissolving the adhesive tape) for analysis. It remains a residue of unusable particles for analysis that results in a loss of information.
- the adhesive can generate surface pollution of the particles that can distort the results of the material analysis.
- a second technique is to use a cloth to collect the particles on the magnetic bar.
- Such a solution also poses certain difficulties. Indeed, it is necessary to clean the cloth by immersing it in a solvent and then filter the product obtained to recover the particles. Moreover, the use of a cloth makes it difficult to recover all the particles; therefore, all the particles is no longer available to carry out the analysis and a residue of particles remains present on the magnetic bar, this residue being likely to distort the indication of pollution during a subsequent control. Finally, the use of a potentially polluted cloth may lead to a suspicion of parasitic pollution.
- a third technique may be to directly collect the particles on the bar with a magnet more powerful than the magnet of the magnetic bar. Such a solution is however difficult to exploit because it would lead to a risk of alteration of the magnetic plug by changing the residual field of the latter.
- the present invention aims to provide a device allowing a simple recovery (including in the in-situ recovery frame, for example under a wing of the aircraft), fast, reliable and complete magnetic particles trapped on a magnetic plug.
- the invention relates to a device for recovering magnetic particles trapped on a magnetic plug, said magnetic plug comprising a magnetic bar for retaining the magnetic particles entrained by a liquid in which said magnetic plug is immersed, said device being characterized in that it comprises:
- a cap comprising a non-magnetic tube comprising:
- a proximal end provided with an opening adapted to ensure the introduction of the magnetic bar into said tube;
- extraction means provided with an opening adapted to ensure the introduction of said tube into said extraction means, said extraction means being able to cover said tube when said tube is introduced into said extraction means so that forming a closed extraction chamber and receiving the particles trapped on said tube when the magnetic bar is removed from said tube, said device being suitable for being dispatched for the particle analysis to be carried out;
- the invention allows the operator to separate the magnetic particles from the magnetic plug, without any loss of said particles.
- the invention also makes it possible to secure the transport of particles to the place where they will be analyzed with a minimum of manipulation and therefore a minimum risk of alteration or contamination of the particles.
- the device according to the invention may have one or more additional characteristics below, considered individually or in any technically possible combination:
- said means able to maintain between said extraction means and said tube when said tube is introduced into said chamber are reversible connection means;
- said reversible connection means are formed by a screw-nut system placed at said proximal end of said tube;
- said cap has a neck connected to the proximal end of said tube and provided with a thread on its outer diameter;
- said tube is an elastic sheath capable of gripping the magnetic bar; said tube comprises a ferromagnetic element placed at its distal end;
- Said means capable of ensuring the maintenance between said cap and the magnetic bar when the magnetic bar is introduced into said tube comprises sealing means adapted to prevent the insertion of metal particles between the tube and magnetic bar;
- Said means capable of ensuring the maintenance between said cap and the magnetic bar when the magnetic bar is introduced into said tube comprises an O-ring inserted into said cap and tightening the magnetic bar by elasticity;
- Said means capable of ensuring the maintenance between said cap and the magnetic bar when the magnetic bar is introduced into said tube comprise flexible tongues inserted into the cap and tightening the magnetic bar by elasticity;
- Said means adapted to maintain between said cap and the magnetic bar when the magnetic bar is introduced into said tube comprise flexible lugs inserted into the cap and tightening the magnetic bar by elasticity;
- the present invention also relates to a method for recovering magnetic particles trapped on a magnetic plug using a device according to one of the preceding claims, said method comprising the following steps:
- FIG. 1 shows, schematically, a magnetic plug
- FIG. 3 shows, schematically, the magnetic cap and its cap in a liquid circuit
- FIG. 4 represents, schematically, the extractor
- FIG. 5 shows, schematically, the device mounted on the magnetic plug
- FIG. 7 and 8 show, schematically, two other embodiments of the cap.
- FIG. 2 schematically represents a cap 4 which is one of the elements of the device 100.
- the cap 4 according to the invention comprises a tube 6 having an open proximal end 15 and a distal end 14 closed.
- the tube 6 comprises a connection device 10 between the cap 4 and the magnetic bar 3 when the magnetic bar 3 is introduced into the tube 6.
- the connecting device 10 can also provide a sealing function between the cap 4 and the magnetic bar 3.
- the shape and dimensions of the tube 6 are complementary to the shape and dimensions of the magnetic bar 3 so that the tube 6 can cover as closely as possible the magnetic bar 3.
- the tube 6 can be made of plastic, flexible or rigid, or metal. In order not to disturb the magnetic field of the magnetic bar 3, the tube 6 must be non-magnetic.
- the tube 6 may be formed by a flexible elastic sheath from gripping the magnetic bar 3 and ensuring the maintenance of the cap 4 thereon. The elastic sheath must be able to withstand the environment in which the magnetic cap is immersed.
- the connection and sealing device 10 between the cap 4 and the magnetic bar 3 is here formed by flexible tabs 10; this device may also be an O-ring 10 'as shown in FIG. 8 or rubber lugs 10 "as shown in FIG. 7 inserted in the tube 6 at its proximal end 15 (the other elements of FIGS. 7 and 8 are identical to the elements of Figure 2).
- the cap 4 also comprises a neck 7, of annular shape, extending outwardly of the tube 6 and connected to the proximal end 15 of the tube 6 and supporting means 12 of reversible connection with the extractor 5 as shown in figure 4 and on which we will return later.
- the connecting device of the tube 6 with the bar 3 may be a ferromagnetic element 13 placed at the distal end 14 of the tube 6 which, once the tube 6 is in contact with the magnetic bar 3, is attracted by said magnetic bar 3 and allows the maintenance between the tube 6 and the magnetic bar 3.
- This ferromagnetic element 13 can complement or replace the connecting device 10 between the tube 6 and the magnetic bar 3 as described above, but does not provide the function sealing between the tube 6 and the magnetic bar 3.
- the extractor 5 shown in FIG. 4 is a tube comprising a proximal end and a closed distal end and which cap the tube 6 and the neck 7 so as to form a closed extraction chamber 16 as shown in Figure 5.
- the extractor 5 may be plastic or metal but must be non-magnetic.
- the extractor 5 may comprise a marking zone in order to facilitate its identification.
- the means 12 for reversible connection between the extractor 5 and the cap 4 are for example formed by a thread 12 on the outside diameter of the neck 7 and a thread 1 1 located on the extractor 5, which cooperating form a screw-nut system.
- Other connecting devices, not shown, can be used: by interlocking, clipping, lugs ...
- the connection between the extractor 5 and the cap 4 must be strong enough to allow the extraction of the device 100 of the bar magnetic 3 and ensure that the particles contained in the closed extraction chamber 16 do not escape.
- FIG. 6 illustrates the extraction of the device 100 from the magnetic plug 1 and the device 100 alone.
- FIGS. 1 to 6 We will describe with reference to FIGS. 1 to 6 an example of a method for recovering ferromagnetic particles trapped on a magnetic plug 1 such as that represented in FIG. 1 by means of the recovery device 100 according to the invention as represented in FIG. 6.
- This recovery device 100 integrates the cap 4 and the extractor 5. This method will preferably be implemented on site by an operator during a control operation of the machine.
- the magnetic plug 1 after having been extracted from the motor by the operator, is capped by the cap 4 to give the assembly illustrated in FIG. 3. More precisely, the cap 4 is disposed on the magnetic bar 3 until the proximal end 15 of the tube 6 is in contact with the head 2 of the magnetic plug 1.
- the plug 1 and the cap 4 are inserted into the motor and the latter is put into operation.
- the Ferromagnetic particles 20 suspended in the liquid are attracted by the magnetic bar 3 and stick to the wall of the tube 6.
- the magnetic plug is removed from the motor by the operator.
- the next step will consist in fixing the extractor 5 by screwing on the cap 4 (via the threads 11 and 12) in order to trap the particles 20 in the extraction chamber 16 .
- the operator removes the device 100 containing the particles of the magnetic plug 1 so that the particles 20 fall to the bottom of the extractor 5 since they are no longer retained by the magnetic bar 3.
- the device 100 can then be dispatched to perform the analysis of the particles.
- the invention makes it possible to avoid the manipulation of the particles and therefore their possible loss or contamination. Furthermore, the device 100 is reusable once the particles analyzed.
- the device according to the invention which has just been described finds a particularly interesting application in use with magnetic plugs used on all machines for which it is important to be able to detect wear, especially on aircraft turbomachines. On the latter, the use of several magnetic plugs, on the various oil circuits, can quickly locate a part with a beginning of wear.
Landscapes
- Sampling And Sample Adjustment (AREA)
- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
- Testing Of Engines (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
- Apparatus Associated With Microorganisms And Enzymes (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1052291A FR2957823B1 (fr) | 2010-03-29 | 2010-03-29 | Dispositif et procede de recuperation de particules magnetiques piegees sur un bouchon magnetique |
| PCT/FR2011/050577 WO2011121207A1 (fr) | 2010-03-29 | 2011-03-21 | Dispositif et procede de recuperation de particules magnetiques piegees sur un bouchon magnetique |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP2552590A1 true EP2552590A1 (fr) | 2013-02-06 |
| EP2552590B1 EP2552590B1 (fr) | 2019-05-22 |
| EP2552590B2 EP2552590B2 (fr) | 2023-02-22 |
Family
ID=42731965
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP11715956.6A Active EP2552590B2 (fr) | 2010-03-29 | 2011-03-21 | Dispositif et procede de recuperation de particules magnetiques piegees sur un bouchon magnetique |
Country Status (10)
| Country | Link |
|---|---|
| US (1) | US9687857B2 (fr) |
| EP (1) | EP2552590B2 (fr) |
| JP (1) | JP5830521B2 (fr) |
| CN (1) | CN102821865B (fr) |
| BR (1) | BR112012024507B1 (fr) |
| CA (1) | CA2793984C (fr) |
| ES (1) | ES2730934T5 (fr) |
| FR (1) | FR2957823B1 (fr) |
| RU (1) | RU2553721C2 (fr) |
| WO (1) | WO2011121207A1 (fr) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5454825B1 (ja) * | 2013-09-18 | 2014-03-26 | 株式会社ヤリステ | 磁気粉分離装置 |
| JP6380034B2 (ja) * | 2014-11-17 | 2018-08-29 | 株式会社豊田自動織機 | 車載用電子機器 |
| JP6680742B2 (ja) * | 2017-10-31 | 2020-04-15 | 大研医器株式会社 | 磁性粒子収集方法及び試験セット |
| CN110479482B (zh) * | 2019-07-19 | 2024-08-06 | 惠州锂威新能源科技有限公司 | 一种可快速清洁的吸附装置及其装配方法 |
| KR102348813B1 (ko) * | 2021-02-24 | 2022-01-10 | 문경희 | 강성 강화 자석봉 |
| CN114534911B (zh) * | 2022-02-25 | 2024-04-09 | 奥星制药设备(石家庄)有限公司 | 一种磁性分离器及清洗方法 |
| FR3167421A1 (fr) | 2024-10-11 | 2026-04-17 | Safran Helicopter Engines | Ensemble et procede pour la detection de limaille |
Family Cites Families (28)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2693979A (en) * | 1950-08-03 | 1954-11-09 | George L Russell | Magnetic device |
| US2594955A (en) † | 1950-08-22 | 1952-04-29 | Albert A Markowitz | Magnetic holder for pencils |
| US2975667A (en) † | 1957-07-22 | 1961-03-21 | Camloc Fastener Corp | Retaining ring for rotary stud fastener |
| GB855928A (en) * | 1957-08-02 | 1960-12-14 | Thoma Jean Ulrich | Magnetic separators |
| US3068316A (en) † | 1959-06-12 | 1962-12-11 | Witt Governor | Cord shortening holder |
| US4644610A (en) † | 1984-09-06 | 1987-02-24 | Fish Ivan L | Disc shaped holder with an expandable center hole |
| SE8601143L (sv) * | 1986-03-12 | 1987-09-13 | Carbematrix Ab | Sett och anordning for samling och spridning av ferromagnetiska partiklar i ett fluidformigt medium |
| GB2232098B (en) † | 1989-05-04 | 1993-06-30 | Univ Swansea | Removal of debris |
| US5027966A (en) * | 1989-09-12 | 1991-07-02 | Yadock David J | Storage containers with magnetic handling means |
| US5043063A (en) * | 1990-03-21 | 1991-08-27 | Eriez Manufacturing Company | Magnetic trap and cleaning means therefor |
| JPH066896U (ja) * | 1992-06-26 | 1994-01-28 | 株式会社トーキン | ドレンボルト |
| FI944937A0 (fi) * | 1994-10-20 | 1994-10-20 | Labsystems Oy | Separeringsanordning |
| US5619569A (en) † | 1995-05-19 | 1997-04-08 | Mcvay; Clifford R. | Coil cord snarl preventing device and method |
| JPH0938522A (ja) * | 1995-07-25 | 1997-02-10 | Somic Ishikawa:Kk | 鉄粉吸着装置 |
| US5906303A (en) † | 1997-04-03 | 1999-05-25 | Carone; Nicholas J. | Baton holder |
| USD425740S (en) † | 1997-11-20 | 2000-05-30 | Daly Michael W | Paper roll brake |
| US5949317A (en) * | 1998-03-31 | 1999-09-07 | Fink; Randy | Magnetic drain plug |
| US6173851B1 (en) † | 1999-03-18 | 2001-01-16 | Anesta Corporation | Method and apparatus for the interim storage of medicated oral dosage forms |
| FI20000583A0 (fi) * | 2000-03-14 | 2000-03-14 | Labsystems Oy | Astia ja sauva |
| USD445980S1 (en) † | 2000-06-20 | 2001-07-31 | Sockpro, Inc. | Sock holder |
| US20020088756A1 (en) * | 2001-01-05 | 2002-07-11 | Wolosion Dan L. | Magnetic cleaning tool |
| US6730217B2 (en) * | 2002-03-29 | 2004-05-04 | Insul-Magnetics, Inc. | Magnetic particle separator and method |
| EP1580555B1 (fr) * | 2002-11-07 | 2014-02-12 | Mitsubishi Chemical Medience Corporation | Materiau magnetique pour recueillir des particules magnetiques et son utilisation |
| FR2848128B1 (fr) * | 2002-12-10 | 2005-09-02 | Progalva Net Et 9 | Dispositif de desembouage magnetique |
| JP2004195341A (ja) * | 2002-12-17 | 2004-07-15 | Aichi Steel Works Ltd | 磁性体粉吸着装置及び磁性体粉吸着装置用磁石 |
| US20070262028A1 (en) * | 2006-05-12 | 2007-11-15 | The Lee Company | Method and device for magnetically filtering fluids |
| CN201172006Y (zh) * | 2008-01-10 | 2008-12-31 | 东南大学 | 燃煤可吸入颗粒物的捕集装置 |
| FR2951961B1 (fr) * | 2009-10-30 | 2011-11-04 | Snecma | Dispositif et procede de recuperation de particules magnetiques piegees sur un bouchon magnetique |
-
2010
- 2010-03-29 FR FR1052291A patent/FR2957823B1/fr active Active
-
2011
- 2011-03-21 CN CN201180017762.7A patent/CN102821865B/zh active Active
- 2011-03-21 EP EP11715956.6A patent/EP2552590B2/fr active Active
- 2011-03-21 WO PCT/FR2011/050577 patent/WO2011121207A1/fr not_active Ceased
- 2011-03-21 BR BR112012024507-4A patent/BR112012024507B1/pt active IP Right Grant
- 2011-03-21 CA CA2793984A patent/CA2793984C/fr active Active
- 2011-03-21 US US13/637,160 patent/US9687857B2/en active Active
- 2011-03-21 JP JP2013501893A patent/JP5830521B2/ja active Active
- 2011-03-21 RU RU2012145457/03A patent/RU2553721C2/ru active
- 2011-03-21 ES ES11715956T patent/ES2730934T5/es active Active
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2011121207A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| BR112012024507B1 (pt) | 2021-01-12 |
| JP5830521B2 (ja) | 2015-12-09 |
| EP2552590B1 (fr) | 2019-05-22 |
| CN102821865B (zh) | 2015-07-22 |
| FR2957823B1 (fr) | 2015-02-27 |
| ES2730934T5 (es) | 2023-04-26 |
| EP2552590B2 (fr) | 2023-02-22 |
| US20130037470A1 (en) | 2013-02-14 |
| CA2793984C (fr) | 2018-05-29 |
| RU2553721C2 (ru) | 2015-06-20 |
| CN102821865A (zh) | 2012-12-12 |
| BR112012024507A2 (pt) | 2016-09-06 |
| US9687857B2 (en) | 2017-06-27 |
| RU2012145457A (ru) | 2014-05-10 |
| FR2957823A1 (fr) | 2011-09-30 |
| ES2730934T3 (es) | 2019-11-13 |
| JP2013523430A (ja) | 2013-06-17 |
| CA2793984A1 (fr) | 2011-10-06 |
| WO2011121207A1 (fr) | 2011-10-06 |
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