WO2022233818A1 - Module d'attraction et de detection de debris - Google Patents
Module d'attraction et de detection de debris Download PDFInfo
- Publication number
- WO2022233818A1 WO2022233818A1 PCT/EP2022/061765 EP2022061765W WO2022233818A1 WO 2022233818 A1 WO2022233818 A1 WO 2022233818A1 EP 2022061765 W EP2022061765 W EP 2022061765W WO 2022233818 A1 WO2022233818 A1 WO 2022233818A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- module
- magnet
- foot
- bar
- debris
- Prior art date
Links
- 230000005294 ferromagnetic effect Effects 0.000 claims abstract description 25
- 238000001514 detection method Methods 0.000 claims description 23
- 238000005461 lubrication Methods 0.000 claims description 14
- 230000004323 axial length Effects 0.000 claims description 5
- 238000011144 upstream manufacturing Methods 0.000 claims description 5
- 230000004907 flux Effects 0.000 claims description 4
- 230000000630 rising effect Effects 0.000 claims description 4
- 238000004804 winding Methods 0.000 claims description 2
- 239000002245 particle Substances 0.000 abstract description 28
- 230000005291 magnetic effect Effects 0.000 abstract description 10
- 239000003921 oil Substances 0.000 description 23
- 230000008901 benefit Effects 0.000 description 5
- 239000012530 fluid Substances 0.000 description 5
- 238000001914 filtration Methods 0.000 description 4
- 239000003638 chemical reducing agent Substances 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- 210000000056 organ Anatomy 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000696 magnetic material Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 229910000938 samarium–cobalt magnet Inorganic materials 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 235000001674 Agaricus brunnescens Nutrition 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000003042 antagnostic effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- KPLQYGBQNPPQGA-UHFFFAOYSA-N cobalt samarium Chemical compound [Co].[Sm] KPLQYGBQNPPQGA-UHFFFAOYSA-N 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910001172 neodymium magnet Inorganic materials 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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
- B03C1/28—Magnetic plugs and dipsticks
- B03C1/282—Magnetic plugs and dipsticks with associated accumulation indicator, e.g. Hall sensor
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M1/00—Pressure lubrication
- F01M1/10—Lubricating systems characterised by the provision therein of lubricant venting or purifying means, e.g. of filters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16N—LUBRICATING
- F16N39/00—Arrangements for conditioning of lubricants in the lubricating system
- F16N39/06—Arrangements for conditioning of lubricants in the lubricating system by filtration
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/06—Investigating concentration of particle suspensions
- G01N15/0656—Investigating concentration of particle suspensions using electric, e.g. electrostatic methods or magnetic methods
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/26—Oils; Viscous liquids; Paints; Inks
- G01N33/28—Oils, i.e. hydrocarbon liquids
- G01N33/2835—Specific substances contained in the oils or fuels
- G01N33/2858—Metal particles
-
- 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
- B03C2201/30—Details of magnetic or electrostatic separation for use in or with vehicles
-
- 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
- B03C2201/32—Checking the quality of the result or the well-functioning of the device
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M1/00—Pressure lubrication
- F01M1/10—Lubricating systems characterised by the provision therein of lubricant venting or purifying means, e.g. of filters
- F01M2001/1007—Lubricating systems characterised by the provision therein of lubricant venting or purifying means, e.g. of filters characterised by the purification means combined with other functions
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M1/00—Pressure lubrication
- F01M1/10—Lubricating systems characterised by the provision therein of lubricant venting or purifying means, e.g. of filters
- F01M2001/1028—Lubricating systems characterised by the provision therein of lubricant venting or purifying means, e.g. of filters characterised by the type of purification
- F01M2001/1042—Lubricating systems characterised by the provision therein of lubricant venting or purifying means, e.g. of filters characterised by the type of purification comprising magnetic parts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2220/00—Application
- F05D2220/30—Application in turbines
- F05D2220/32—Application in turbines in gas turbines
- F05D2220/323—Application in turbines in gas turbines for aircraft propulsion, e.g. jet engines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2260/00—Function
- F05D2260/80—Diagnostics
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16N—LUBRICATING
- F16N2200/00—Condition of lubricant
- F16N2200/04—Detecting debris, chips, swarfs
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N2015/0042—Investigating dispersion of solids
- G01N2015/0053—Investigating dispersion of solids in liquids, e.g. trouble
Definitions
- the invention relates to the monitoring of lubricated mechanical components in a turbomachine. More specifically, the invention relates to the detection of ferromagnetic debris in the oil of a turbomachine. The invention also relates to a turbomachine, in particular an aircraft turbojet or an aircraft turboprop.
- Document EP 3 363 518 A1 discloses an electrical detection system for the presence of ferrous particles in a fluid.
- This system includes both a magnet and an electric coil. In operation, the ferrous particles are attracted by the magnet and the disturbances of the electromagnetic field are measured to deduce the presence of the debris. To prevent debris from accumulating on the magnet, this system is equipped with magnet protection strainers. Strainers are also used to filter debris of given dimensions so that they are not counted by the detector.
- This system has a weakness because it can generate pressure drops, which are negligible for high pressures and flow rates, but which can alter the flow of the fluid for lower pressure flows.
- the functions of attracting particles and detecting debris can be antagonistic: the attraction of particles requires maximizing the attraction surface, so that the generated magnetic field - which decreases sharply with distance - can reach a maximum of particles in the flow; and particle detection requires that a given particle has as large an impact as possible on the magnetic field (to pass a detection threshold) and therefore requires a small attraction surface.
- the aim of the invention is to solve at least one of the problems encountered in the systems of the prior art. More precisely, the aim of the invention is to propose an alternative to the known debris detection system, but having a higher measurement reliability, by means of a design allowing both increased attraction of ferromagnetic particles and acceptable detection. particles.
- the invention relates to a module for attracting and detecting ferromagnetic debris in an oil flow of a turbomachine, the module comprising: a permanent magnet of cylindrical shape; a ferromagnetic bar composed of a foot rising radially from the magnet and a cap extending circumferentially from the foot; and a coil wrapped around the foot.
- the shape of the magnet defines the cylindrical coordinate system referred to below.
- the foot being circumferentially thinner than the hat, it allows both the concentration of the field lines (and therefore the increase in sensitivity to the presence of a particle) and a convenient winding of the coil.
- the cap which is more circumferentially extended, creates a larger attraction surface for the particles and thus maximizes the capture of the particles without deteriorating the sensitivity of the module.
- the cap is of parallelepipedal shape and extends from the foot, perpendicular to the latter.
- the coil is wound around a coil support threaded onto the foot.
- the cap comprises two circumferentially opposite ends and each formed of a cylinder portion. This shape makes it possible to locally increase the surface of attraction.
- the two ends are separated from each other by a distance substantially equivalent to the diameter of the magnet.
- This design allows the bar to intersect a greater number of field lines.
- the diameter of the cylinder portions forming the ends is approximately equal to the circumferential width of the foot, and is preferably between 1.5 and 2.5 mm, in particular approximately 2 mm.
- the circumferential width of the foot is between 25% and 50% of the diameter of the magnet, and is preferably about 2.5 mm.
- the field is therefore two to four times denser in the foot than in the magnet.
- the radial height of the foot is around 50% of the diameter of the magnet, and is preferably around 2 mm.
- the cap is spaced from the magnet by a distance which is of the same order of magnitude as the radius of the magnet.
- the axial length of the bar is equal to the axial length of the magnet and is in particular around 30 mm. It is understood that the length can be increased or reduced depending on the transverse dimension of the passage.
- the ferromagnetic bar is a first bar, the module comprising a second bar arranged diametrically opposite the first bar. The first and second bars can be identical and thus multiply the power of attraction of the particles.
- the magnet comprises two diametrically opposite poles, the or each bar being arranged in line with one pole.
- the poles can be separated axially.
- the module comprises a strainer describing at least one cylindrical portion and arranged coaxially with the magnet. Depending on its position relative to the magnet, the strainer can limit the size of the particles that reach the magnet and avoid saturation of the particles on the magnet. Alternatively, the strainer can collect the largest particles that have been attracted by the magnet without adhering to it in order to protect the pumps and organs downstream of it.
- the strainer is made of non-magnetic material. Its influence on the measurements is therefore negligible.
- the invention also relates to a system for detecting ferromagnetic debris in a flow of oil from a turbomachine, the system comprising a passage intended to be traversed by the flow and a module for attracting and detecting the ferromagnetic debris present in the stream, the module being in accordance with one of the embodiments described above.
- bypassage we mean a volume of the space traversed by the fluid, which can be delimited by a wall or several walls allowing a fluid to flow in at least one direction.
- the module is positioned in the passage in such a way that the axis of the cylinder is perpendicular to the direction of the flow of the flux in the passage, the cap being placed upstream of the magnet .
- the subject of the invention is an aircraft turbojet engine comprising a lubrication unit made of a one-piece body receiving several pumps and filters, several oil inlets and outlets, and a debris detection system, remarkable in that the debris detection system is in accordance with one of the embodiments above and is disposed in an oil inlet upstream of the pumps and filters.
- the module may comprise integrated signal processing electronics, or remote and connected with or without wires to the module. The signal is processed in particular to detect variations in the magnetic field perceived by the coil.
- the module also has the advantage of not disturbing the flow of the fluid more than necessary. Other advantages will become apparent from the examples described below.
- FIG. 1 represents an axial turbomachine according to the invention
- Figure 2 illustrates an isometric view of the body of a lubrication group
- FIG. 3 shows an example of a debris detection system according to the invention
- FIG. 4 shows a debris attraction and detection module according to the invention
- Figure 5 shows a sectional view of the module
- Figure 6 shows the field lines in the section of Figure 5
- Figure 7 shows a variant of the attraction and detection module
- Figures 8 and 9 show a module comprising a strainer;
- Figure 10 illustrates an alternative with a parallelepipedal cap.
- magnet refers to a permanent magnet.
- the flow of the flux in the passage at the level of the magnet is carried out according to a main direction of flow which is transverse to the module (perpendicular or simply secant). Upstream and downstream are understood in relation to the flow direction of the oil flow in the passage.
- FIG. 1 shows an example of a turbofan engine.
- the turbojet engine 2 comprises a low-pressure compressor 4, a high-pressure compressor 6, a combustion chamber 8 and one or more levels of turbines 10.
- the mechanical power of the turbines 10 is transmitted via shafts to the rotor 12 and sets the two compressors 4 and 6 in motion.
- the rotation of the rotor around its axis of rotation 14 makes it possible to generate an air flow and to compress it progressively until it enters the combustion chamber 8.
- a fan 16 is coupled to the rotor 12 and generates an air flow which is divided into a primary flow 18 crossing the various aforementioned levels of the turbomachine, and a secondary flow 20 passing through an annular duct.
- Reduction means 22 can reduce the speed of rotation of the fan 16 and/or of the low pressure compressor 4 with respect to the speed of the associated turbine 10.
- the rotor 12 comprises several coaxial shafts 24 supported by bearings 26.
- the cooling and/or the lubrication of the bearings 26 and of the optional reducer 22 are ensured by a lubrication circuit 28.
- the lubrication circuit 28 can comprise a heat exchanger. heat 30 to cool the oil whose temperature can exceed 200°C.
- the lubrication circuit 28 may include lines 32 for recovering oil collecting the oil in the lubrication chambers of the bearings 26 and conveying it into the reservoir 34. It may also include a line 32 for recovering the lubricating oil reducer 22 and returning this oil to tank 34.
- the lubrication circuit 28 may include a lubrication unit 36.
- the lubrication unit 36 is a unit composed of a one-piece body which accommodates several hydraulic functions such as several pumps and filters. It pressurizes the oil taken from the tank and distributes it to the engine components that need to be lubricated. Then, the lubrication group 36 reconditions the oil (cooling, filtration, monitoring) and sends it back to the tank 34.
- FIG. 2 illustrates an example in isometric view of a body 38 of the lubrication group 36.
- the body 38 can be manufactured by additive manufacturing and be of particularly complex shape.
- the body 38 can be in one piece.
- FIG. 3 diagrams a debris detection system 45 according to the invention.
- a passage 50 for example in the vicinity of the entrance 42, accommodates a module 60 for attracting and detecting ferromagnetic particles. This protrudes into the passage 50. It can occupy the entire height/width of the passage or less. Its protruding length and its orientation can be adjusted mechanically by appropriate means (electric motor, screw, piston, etc.).
- the detection system 45 makes it possible to detect the presence and/or the circulation of ferromagnetic debris, or ferromagnetic particles, contained in the oil. These debris may in particular result from wear of a bearing or wear of a gear tooth of the reducer 22.
- Module 60 can be connected to a signal processing unit (not shown).
- the processing unit manages to identify the presence of debris at the level of each pipe.
- the detectable debris can have a size between 50 ⁇ m and 1000 ⁇ m, or between 150 ⁇ m and 750 ⁇ m.
- Figure 4 shows an example of detection module 60.
- Module 60 comprises a magnet 62 of cylindrical shape and axis A.
- the magnet can be of the NdFeB type and preferably SmCo (Samarium-Cobalt), retaining its properties at a temperature of 350°C.
- the magnet is chosen not to be too powerful, so as not to capture all the particles and saturate the detection module.
- the main objective remains statistical detection and monitoring of the increase in the number of particles.
- the magnet can be chosen according to the oil flow it encounters.
- a magnet with a coercivity of around 800 kA/m can be chosen to target particles with a size of around 500 microns.
- references “axial”, “radial” and “circumferential” relate to the magnet 62, "axial” being understood parallel to the axis A, “radial” being understood as perpendicular to the axis A and “circumferential” being such that the axial, radial and circumferential directions form a cylindrical coordinate system (A, R, T).
- the module 60 further comprises a ferromagnetic bar 64 (for example made of M50 steel) attached to the magnet 62.
- the bar 64 can extend over the entire axial length L of the magnet 62.
- the bar 64 has a foot 66 rising radially from the magnet 62 and a cap 68 extending circumferentially on either side of the foot 66.
- a coil 70 is wound around foot 66.
- Coil 70 may include several tens or hundreds of turns. Coil 70 detects variations in the magnetic field: when a ferromagnetic particle attracted by bar 64 passes near magnet 62, the magnetic field generated by magnet 62 is disturbed and these disturbances are measured by coil 70.
- Magnet 62 has the dual role of attracting ferromagnetic debris found in the oil flow (attraction amplified by bar 66) and generating a magnetic field detectable by coil 70.
- the detection technology used is similar, for example, to the technology disclosed in document WO 2017/157855 A1 or in document EP 3 363 518 A1.
- a ferromagnetic particle arrives close to the magnet 62, it modifies the magnetic field and creates discontinuities in the intensity of the coil 70.
- the module 60 recognizes that a particle ferromagnetic has passed.
- Figure 5 shows a section of the module 60 in a plane perpendicular to the axis A. It can be seen that the bar 64 can have a "mushroom” shaped section.
- Magnet 62 may have a diameter D of approximately 5 mm.
- the foot 66 has a circumferential width e and a radial height h.
- the width e characterizes the concentration of the field lines.
- the height h materializes the radial distance between the cap 68 and the magnet 62.
- the width e can be between 25% and 50% of the diameter D of the magnet 62, and for example be around 2.5 mm.
- Cap 68 extends radially by a width E approximately equal to diameter D.
- the radial height h can be approximately 50% of the diameter D of the magnet 62, the cap thus being distant from the center of the magnet by 4 to 6 mm, and in particular by 4.6 mm.
- the ends 68.1 and 68.2 of the cap 68 have the shape of a cylinder portion of diameter d.
- the value of d may be approximately equal to zero.
- the values of d and e can for example be between 1.5 and 2.5 mm, and preferably be about 1.75 mm or about 2 mm.
- the distance between the two centers of the cylinder portions 68.1, 68.2 is between 5 and 7 mm, preferably 6.5 mm.
- Coil 70 can be housed in grooves provided in foot 66 or alternatively, as drawn in FIG. 5, a cage 72 made of non-magnetic material can make it possible to confine coil 70. around foot 66.
- the module comprises an additional coil, called “Built-in test” making it possible to generate a magnetic field and to check the response of the coil 70, for example before starting a turbojet engine.
- the radially outer surface 68.3 of the cap 68 as well as the cylinder portions 68.1, 68.2 constitute the debris attraction surfaces. They are particularly advantageous for attracting particles because they have a large surface area for a small footprint.
- the surface 68.3 can generally be cylindrical with a diameter twice that of the magnet, ie 10 mm for example.
- Figure 6 shows the field lines of the magnetic field generated by the magnet. This figure highlights in particular the concentration of the field lines through the foot 66.
- Figure 7 illustrates an alternative where two bars 64 are arranged diametrically on each side of the magnet 62.
- the bars 64 can be positioned in line with the N/S poles of the magnet.
- FIG. 8 shows an implementation of the module 60 with a strainer 80.
- the strainer comprises a filtration mesh 82 extending from a base 84 towards a ceiling 86.
- the base 84 and the ceiling 86 can correspond to an orifice made in a pipe 51 delimiting passage 50. Alternatively, the strainer may occupy only part of passage 50. Appropriate seals and mounting means (not shown) may be provided.
- Magnet 62 and yoke 64 can be welded to base 84 of strainer 80.
- a press fit or crimp fit can be used.
- Lattice 82 can take the form of a cylinder or a portion of a cylinder, for example extending over 180° around axis A. Lattice 82 and magnet 62 are advantageously coaxial.
- the mesh size of the mesh 82 can be greater than or equal to 500 ⁇ m, to prevent the largest particles (greater than a size of the order of 500 to 1000 ⁇ m) from damaging the pumps.
- Filtration elements arranged downstream of the pumps can be provided to protect the engine components (injectors, enclosures) with a filtration of the order of 10 to 150 pm.
- the strainer 80 can be made entirely, including with its mesh 82, by additive manufacturing.
- the axis A is secant to the main direction of the flow F, preferably perpendicular.
- the magnet 62 and the bar 64 extend over all or part of the height of the strainer 80.
- Figure 9 illustrates these aspects in a cross-sectional view along the axis IX:IX of Figure 8.
- flux F first encounters bar 64, then magnet 62, then lattice 82.
- another orientation around axis A may be favored for bar 64 and magnet 62.
- Figure 9 also shows the order of magnitude of the ratio between the diameter of the magnet 62 and that of the lattice 82 which can be of the order of 3.
- the module 60 is arranged in a bend of a pipe such that the axis A is substantially parallel to the flow.
- Figure 10 illustrates an alternative in which the cap is of parallelepiped shape.
- a design has substantially the same advantages as the form described in FIGS. 4 to 9.
- the various aspects presented in FIGS. 4 to 9 can be applied to such a magnet, in particular semi-cylindrical ends and ends of such a magnet can be flat or semi-cylindrical, the ratios of the dimensions, the presence of two magnets at 180°, the integration in a strainer, etc.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Health & Medical Sciences (AREA)
- Analytical Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Physics & Mathematics (AREA)
- Pathology (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Dispersion Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Food Science & Technology (AREA)
- Medicinal Chemistry (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202280040677.0A CN117425526A (zh) | 2021-05-06 | 2022-05-03 | 用于吸引和检测碎屑的模块 |
US18/558,877 US20240240578A1 (en) | 2021-05-06 | 2022-05-03 | Module for attracting and detecting debris |
EP22726738.2A EP4334039A1 (fr) | 2021-05-06 | 2022-05-03 | Module d'attraction et de detection de debris |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BEBE2021/5370 | 2021-05-06 | ||
BE20215370A BE1029383B1 (fr) | 2021-05-06 | 2021-05-06 | Module d'attraction et de detection de debris |
Publications (1)
Publication Number | Publication Date |
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WO2022233818A1 true WO2022233818A1 (fr) | 2022-11-10 |
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PCT/EP2022/061765 WO2022233818A1 (fr) | 2021-05-06 | 2022-05-03 | Module d'attraction et de detection de debris |
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US (1) | US20240240578A1 (fr) |
EP (1) | EP4334039A1 (fr) |
CN (1) | CN117425526A (fr) |
BE (1) | BE1029383B1 (fr) |
WO (1) | WO2022233818A1 (fr) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2598818A1 (fr) * | 1986-05-16 | 1987-11-20 | Aeroquip Corp | Dispositif pour verifier l'integrite d'un systeme de detection et de capture de debris ferreux dans un liquide en circulation et detecteur pour constituer un dispositif de ce genre. |
EP2455774A1 (fr) * | 2010-11-19 | 2012-05-23 | ARGO-HYTOS GmbH | Dispositif de capteur et son procédé de fonctionnement |
WO2017157855A1 (fr) | 2016-03-14 | 2017-09-21 | Safran Aero Boosters S.A. | Capteur de particules dans un fluide d'un système de lubrification |
EP3363518A1 (fr) | 2017-02-15 | 2018-08-22 | Safran Aero Boosters SA | Procédé et système de détection de débris pour turbomachine |
EP3627032A1 (fr) * | 2018-09-19 | 2020-03-25 | Airbus Helicopters | Dispositif magnetique destine a capter des particules metalliques d'usure en suspension dans un fluide de lubrification |
-
2021
- 2021-05-06 BE BE20215370A patent/BE1029383B1/fr active IP Right Grant
-
2022
- 2022-05-03 EP EP22726738.2A patent/EP4334039A1/fr active Pending
- 2022-05-03 WO PCT/EP2022/061765 patent/WO2022233818A1/fr active Application Filing
- 2022-05-03 CN CN202280040677.0A patent/CN117425526A/zh active Pending
- 2022-05-03 US US18/558,877 patent/US20240240578A1/en active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2598818A1 (fr) * | 1986-05-16 | 1987-11-20 | Aeroquip Corp | Dispositif pour verifier l'integrite d'un systeme de detection et de capture de debris ferreux dans un liquide en circulation et detecteur pour constituer un dispositif de ce genre. |
EP2455774A1 (fr) * | 2010-11-19 | 2012-05-23 | ARGO-HYTOS GmbH | Dispositif de capteur et son procédé de fonctionnement |
WO2017157855A1 (fr) | 2016-03-14 | 2017-09-21 | Safran Aero Boosters S.A. | Capteur de particules dans un fluide d'un système de lubrification |
EP3363518A1 (fr) | 2017-02-15 | 2018-08-22 | Safran Aero Boosters SA | Procédé et système de détection de débris pour turbomachine |
EP3627032A1 (fr) * | 2018-09-19 | 2020-03-25 | Airbus Helicopters | Dispositif magnetique destine a capter des particules metalliques d'usure en suspension dans un fluide de lubrification |
Also Published As
Publication number | Publication date |
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BE1029383A1 (fr) | 2022-12-02 |
BE1029383B1 (fr) | 2022-12-05 |
EP4334039A1 (fr) | 2024-03-13 |
CN117425526A (zh) | 2024-01-19 |
US20240240578A1 (en) | 2024-07-18 |
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