EP3976928A1 - Ensemble pour turbomachine - Google Patents
Ensemble pour turbomachineInfo
- Publication number
- EP3976928A1 EP3976928A1 EP20728038.9A EP20728038A EP3976928A1 EP 3976928 A1 EP3976928 A1 EP 3976928A1 EP 20728038 A EP20728038 A EP 20728038A EP 3976928 A1 EP3976928 A1 EP 3976928A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- rotor
- longitudinal axis
- radially
- radial thickness
- assembly according
- 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
- 238000006073 displacement reaction Methods 0.000 claims abstract description 16
- 239000006096 absorbing agent Substances 0.000 claims description 20
- 230000035939 shock Effects 0.000 claims description 20
- 241000272165 Charadriidae Species 0.000 claims description 10
- 238000010009 beating Methods 0.000 claims description 7
- 230000000284 resting effect Effects 0.000 claims description 4
- 239000000463 material Substances 0.000 description 11
- 238000013016 damping Methods 0.000 description 10
- 238000000576 coating method Methods 0.000 description 8
- 238000007789 sealing Methods 0.000 description 8
- 239000011248 coating agent Substances 0.000 description 7
- 230000010363 phase shift Effects 0.000 description 7
- 238000011144 upstream manufacturing Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 5
- 230000004044 response Effects 0.000 description 4
- 238000005452 bending Methods 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000001050 lubricating effect Effects 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000006399 behavior Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 229910052961 molybdenite Inorganic materials 0.000 description 1
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 description 1
- 229910052982 molybdenum disulfide Inorganic materials 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000021715 photosynthesis, light harvesting Effects 0.000 description 1
- 229920003223 poly(pyromellitimide-1,4-diphenyl ether) Polymers 0.000 description 1
- 230000036316 preload Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
- F01D5/12—Blades
- F01D5/26—Antivibration means not restricted to blade form or construction or to blade-to-blade connections or to the use of particular materials
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
- F01D5/12—Blades
- F01D5/14—Form or construction
- F01D5/16—Form or construction for counteracting blade vibration
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
- F01D5/12—Blades
- F01D5/22—Blade-to-blade connections, e.g. for damping vibrations
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
- F01D5/12—Blades
- F01D5/22—Blade-to-blade connections, e.g. for damping vibrations
- F01D5/225—Blade-to-blade connections, e.g. for damping vibrations by shrouding
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/26—Rotors specially for elastic fluids
- F04D29/32—Rotors specially for elastic fluids for axial flow pumps
- F04D29/321—Rotors specially for elastic fluids for axial flow pumps for axial flow compressors
- F04D29/324—Blades
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/668—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps damping or preventing mechanical vibrations
-
- 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
- F05D2220/36—Application in turbines specially adapted for the fan of turbofan 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
- F05D2230/00—Manufacture
- F05D2230/60—Assembly methods
-
- 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
- F05D2240/00—Components
- F05D2240/80—Platforms for stationary or moving blades
-
- 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
- F05D2260/96—Preventing, counteracting or reducing vibration or noise
Definitions
- the present invention relates to an assembly for a turbomachine.
- the invention more specifically relates to an assembly for a turbomachine comprising a damper.
- a turbomachine known from the state of the art comprises a casing and a fan capable of being rotated relative to the casing, about a longitudinal axis, by means of a fan shaft.
- the fan comprises a disc centered on the longitudinal axis, and a plurality of vanes distributed circumferentially at the outer part of the disc.
- the range of operation of the blower is limited. More precisely, the evolution of a fan compression ratio as a function of the air flow rate that it draws in when it is rotated is restricted to a predetermined range.
- the fan is in fact subjected to aeroelastic phenomena which destabilize it. Specifically, the air flowing through the running blower supplies energy to the blades, and the blades respond in their own modes at levels that may exceed the endurance limit of the material they are made of. This fluid-structure coupling therefore generates vibrational instabilities which accelerate the wear of the fan and reduce its life.
- shock absorbers have been described in documents FR 2 949 142, EP 1 985 810 and FR 2 923 557, in the name of the Applicant. These dampers are all configured to be housed between the platform and the root of each blade, within the housing delimited by the respective stilts of two successive blades. Moreover, such dampers operate during a relative movement between two successive blade platforms, by dissipation of the vibration energy, for example by friction. Therefore, these shock absorbers are only attached to damping a first vibratory mode of the blades which characterizes a synchronous response of the blades to aerodynamic stresses. In this first vibratory mode, the inter-vane phase shift is non-zero.
- this second vibratory mode is coupled between the vanes, the disc, and the fan shaft.
- the amplitude of this second vibratory mode is all the more important as the blades are large.
- An object of the invention is to damp a mode of vibration of a rotor in which the phase shift between the blades of said rotor is zero.
- Another object of the invention is to influence the damping of vibration modes of a rotor in which the phase shift between the blades of said rotor is non-zero.
- Another aim of the invention is to provide a simple and easy to implement damping solution.
- an assembly for a turbomachine comprising:
- o including:
- a damper configured to damp a movement of the first rotor relative to the second rotor, in a plane orthogonal to the longitudinal axis, the movement being caused by a beating of at least one blade among the plurality of blades, the damper including: o a first part coming to rest on the first rotor, and having:
- the second vibratory mode is characterized by a zero inter-vane phase shift. Therefore, placing a damper between two successive blades of a rotor, as has already been proposed in the prior art, has no effect on the second vibration mode.
- the shock absorber being annular, it makes it possible to distribute the bearing stresses applied by the damper on the first rotor and on the second rotor, over a larger area. From there, the shock absorber wears less the first rotor and the second rotor on which it comes to rest.
- the third part being thicker than the first part and the second part, it is more massive. The third part therefore makes it possible to limit the tangential propagation of the vibratory modes to which the first rotor and the second rotor are subjected.
- the shock absorber is capable, thanks to this third part, of dissipating the vibrations by its work in bending and in inertia.
- the assembly according to the invention can further comprise one of the following characteristics, taken alone or in combination with one or more of the other of the following characteristics:
- the first part is configured to apply a first centrifugal force on the first rotor
- the second part is configured to apply a second centrifugal force on the second rotor
- the first bearing part has a radially outer surface coming into contact with a radially inner surface of the first rotor and the second bearing part has a radially outer surface coming into contact with a radially inner surface of the second rotor
- the third radial thickness is greater than each of the first radial thickness and the second radial thickness
- the second radial thickness is greater than the first radial thickness
- the bulge comprises a first lip projecting radially towards the inside of the shock absorber
- the bulge includes a second lip projecting radially outwards from the shock absorber
- the third part includes a depression
- the third part has a first bearing surface arranged to apply a first force on the second rotor, the first force having a first longitudinal component in a first direction parallel to the longitudinal axis, and a first radial component in a second direction orthogonal to the longitudinal axis, the first longitudinal component being greater than the first radial component, o the second part has a second bearing surface arranged to apply a second force on the second rotor, the second force having a second longitudinal component in the first direction, and a second radial component in the second direction, the second radial component being greater than the second longitudinal component,
- each of the blades among the plurality of blades comprises:
- the second rotor comprises a ferrule, the ferrule comprising an extension
- the shock absorber is annular, and extends all around the longitudinal axis.
- a turbomachine comprising an assembly as described above, and in which the first rotor is a fan, and the second rotor is a low pressure compressor.
- Figure 1 schematically illustrates a turbomachine
- FIG. 2 comprises a sectional view of part of a turbomachine, and a curve indicating a tangential displacement of various elements of this part of the turbomachine as a function of the position of said elements along a longitudinal axis of the turbomachine
- Figure 3 is a sectional view of part of an exemplary embodiment of an assembly according to the invention
- Figure 4 is a perspective view of part of an exemplary embodiment of an assembly according to the invention.
- FIG. 5 is a perspective view of part of a damper of an exemplary embodiment of an assembly according to the invention.
- a turbomachine 1 comprises a housing 10, a fan 12, a low pressure compressor 140, a high pressure compressor 142, a combustion chamber 16, a high pressure turbine 180 and a low pressure turbine 182.
- Each of the blower 12, the low pressure compressor 140, the high pressure compressor 142, the high pressure turbine 180, and the low pressure turbine 182, is rotatable relative to the housing 10 about a longitudinal axis X-X.
- the fan 12 and the low pressure compressor 140 are integral in rotation, and are capable of being rotated by a low pressure shaft 13 which is itself capable of being rotated by the low pressure turbine 182.
- the high pressure compressor 142 is itself capable of being rotated by a high pressure shaft 15, which is itself susceptible to rotation. to be rotated by the high pressure turbine 180.
- the blower 12 draws in an air flow 110 which separates between a secondary flow 112, circulating around the casing 10, and a primary flow 111, successively compressed within the low pressure compressor 140 and the high pressure compressor 142, ignited within the combustion chamber 16, then successively expanded within the high pressure turbine 180 and the low pressure turbine 182.
- Upstream and downstream are here defined relative to the direction of normal flow of air 110, 111, 112 through the turbomachine 1.
- an axial direction corresponds to the direction of the longitudinal axis XX
- a radial direction is a direction which is perpendicular to this longitudinal axis XX and which passes through said longitudinal axis XX
- a circumferential, or tangential direction corresponds to the direction of a flat and closed curved line, all the points of which are at equal distance from the longitudinal axis XX.
- the terms “internal (or internal)” and “external (or external)”, respectively, are used with reference to a radial direction such that the part or the internal face (ie radially internal) d an element is closer to the longitudinal axis XX than the part or the external face (ie radially external) of the same element.
- the fan 12 comprises a disc 120 and a plurality of vanes 122 distributed circumferentially at an outer part of the disc 120.
- each of the blades 122 of the plurality of blades 122 includes:
- the paddle wheel 1220 may be integral with the disc 120 when the blower 12 is a one-piece bladed disc. Alternatively, as shown in Figure 3, the paddle wheel 1220 can be configured to be housed in a recess 1200 of the disc 120 provided for this purpose.
- the low pressure compressor 140 also comprises a plurality of vanes 1400 fixedly mounted at an outer part of a ferrule 1402, said ferrule 1402 comprising a circumferential extension 1404 at the outer end. from which radial sealing lips 1406 extend.
- the radial sealing wipers 1406 come opposite the platforms 1226 of the vanes 122 of the fan 12, so as to guarantee the internal sealing of the flow stream within which the primary flow 111 circulates.
- the shell 1402 of the low pressure compressor 140 is fixed to the disc 120 of the fan 12, for example by bolting.
- Each of the vanes 122 of the plurality of fan blades 122 12 is capable of beating, vibrating relative to the disc 120 during a rotation of the fan 12 relative to the housing 10. More precisely, during the coupling between the. air 110 circulating within the fan 12 and the profiled blades 1222, the blades 122 are the site of aeroelastic floating phenomena on different vibratory modes, and whose amplitude can be such that it exceeds the endurance limits of the materials constituting the fan 12. These vibratory modes are also coupled to the opposing forces of compression upstream of the turbomachine 1, and of expansion downstream of the latter.
- a first vibratory mode characterizes a synchronous response of the blades 122 to aerodynamic stresses, in which the inter-blade phase shift is non-zero.
- a second vibratory mode characterizes an asynchronous response of the blades 122 to aerodynamic stresses, in which the inter-blade phase shift is zero.
- the amplitude of the beats of the second vibratory mode is moreover as great as the blades 122 of the fan 12 are large.
- this second vibratory mode is coupled between the blades 122, the disc 120, and the fan shaft 13.
- the frequency of the second vibratory mode is, moreover, one and a half times higher than that of the first vibratory mode.
- the second vibratory mode has a nodal deformation at mid-height of the blades 122 of fan 12.
- the beating of the blades 122 implies a non-zero moment on the low pressure shaft 13.
- these vibratory modes lead to intense torsional forces within the low pressure shaft 13.
- the The length of the vanes 122 of the fan 12 is greater than the length of the vanes 1400 of the low pressure compressor 140. Therefore, the tangential bending moment caused by the flapping of a vane 122 of the fan 12 is greater than the tangential bending moment driven by beats of a blade 1400 of the low pressure compressor 140.
- the blades of the blades 122 of the fan 12 and of the blades 1400 of the low pressure compressor pr Session 140 then have very different behaviors.
- the mounting stiffness within the fan 12 is different from the mounting stiffness within the low pressure compressor 140.
- the amplitude of this displacement for the second vibratory mode is for example between 0.01 and 0.09 millimeter, typically of the order of 0.06 millimeter, or, in another example, is of the order of a few tenths of a millimeter, for example 0.1 or 0.2 or 0.3 millimeter.
- a damper 2 is used to damp these vibrations from the fan 12 and / or the low pressure compressor 140.
- the damper 2 is in particular configured to damp a movement of the fan 12 relative to the low pressure compressor 140, in a plane orthogonal to the longitudinal axis XX, the movement being caused by a fluttering of at least one blade 122 among the plurality of blades 122 of the fan 12.
- the shock absorber 2 comprises:
- the damper 2 is annular, and therefore extends all around the longitudinal axis XX. More precisely, the first part 21 has a first radially internal surface 211 extending all around the longitudinal axis XX, and a first radially outer surface 212 extending all around the first radially inner surface 211.
- the second part 22 has a second radially inner surface 221 extending all around the longitudinal axis XX, and a second radially surface external 222 extending all around the second radially internal surface 221.
- the third part 23 has a third radially internal surface 2310 extending all around the longitudinal axis XX, and a third radially external surface 2320 extending all around the third radially inner surface 2310.
- the first part 21 has a first radial thickness E1 measured perpendicular to the longitudinal axis XX between the first radially internal surface 211 and the first radially external surface 212.
- the second part 22 has a second radial thickness E2 measured
- the third part 23 has a third radial thickness E3 measured perpendicularly to the longitudinal axis XX between the third radially internal surface 2310 and the third radially outer surface 2320.
- the third radial thickness E3 is greater than at least one of the first radial thickness E1 and the second radial thickness E2. In one embodiment, for example illustrated in FIG. 4, the third radial thickness E3 is greater than each of the first radial thickness E1 and of the second radial thickness E2. In this way, the third part 23 is more massive than the first part 21 and than the second part 22. In an equally advantageous variant, the second radial thickness E2 is greater than the first radial thickness E1, so as to promote the support. of the second part 22 on the low pressure compressor 140.
- the first part 21 bears on each of the platforms 1226 of the blades 122 of the fan 12, preferably at the level of an internal surface of each of the platforms 1226.
- An annular damper 2 is moreover particularly suitable for a blower 12 comprising a disc 120 which is bladed in one piece.
- the damper 2 is annular, then the support of the first part 21 on the various platforms 1226 of the blades 122 is not uniform. This induces inhomogeneous damping around the longitudinal axis XX and, hence, the risk of wear of the platforms 1226 and of the damper 2.
- the internal surfaces of the platforms 1226 may include reliefs so as to be axisymmetric.
- This circumferential non-symmetry on the inner side of the platforms 1226 can thus optimize the mutual supports of the damper 2, in particular their distributions, while favoring, where appropriate, wear on the support of these reliefs.
- the second part 22 bears on the circumferential extension 1404 of the ferrule 1402 of the low pressure compressor 140, at the level of an internal surface of the radial sealing wipers 1406. In fact, it is in this position. that the displacement of the fan 12 relative to the low pressure compressor 140, in the plane orthogonal to the longitudinal axis XX, is of greater amplitude, typically a few millimeters. Consequently, the damper 2 is particularly effective there.
- the damper 2 comprises a material from the range having the trade name “SMACTANE® ST” and / or “SMACTANE® SP”, for example a material of the type “SMACTANE® ST 70” and / or “SMACTANE® SP 50”. It has in fact been observed that such materials exhibit suitable damping properties.
- the first part 21 is configured to apply a first centrifugal force C1 on the fan 12, while the second part 22 is configured to apply a second centrifugal force C2 on the low compressor pressure 140.
- the first support part is configured to apply the first centrifugal force C1 on the fan 12, while the second part 22 is configured to apply a second centrifugal force C2 on the low compressor pressure 140.
- the second support part is radially internal of the fan 12, typically a radially internal surface of the platform 1226.
- these parts 21, 22 are each dynamically coupled respectively to the fan 12 and to the low pressure compressor 140 on which each bears, so as to undergo the same vibrations as each of the fan 12 and of the low pressure compressor 140.
- the third part 23 is steeper, especially in a tangential direction.
- a movement of the fan 12 relative to the low-pressure compressor 140 in a plane orthogonal to the longitudinal axis XX, causes tangential shearing of the damper 2 which causes circumferential movements of said damper 2.
- the supports respective on the fan 12 and the low pressure compressor 140 are therefore broken, then quickly resumed to apply again the centrifugal forces C1, C2. These breaks and resumptions of the supports allow amortization.
- the tangential movements of the high-frequency fan 12 are damped when the parts 21, 22 bear against the fan 12 and the low-pressure compressor 140.
- the third part 23 comprises a bulge 231, 232, which is preferably annular.
- the bulge 231, 232 comprises a first lip 231, also annular, and projecting radially towards the inside of the damper 2.
- the first lip 231 is intended to make the third part 23 heavier, which advantageously increases its tangential inertia.
- the bulge 231, 232 comprises a second lip 232, also annular, and projecting radially outwardly from the damper 2. In addition to its function of weighing down the third part 23 resulting in
- the second lip also makes it possible to ensure the axial wedging of the damper 2 between the fan 12 and the
- the third part 23 has a first bearing surface 2321 arranged to apply a first force F1 on the low pressure compressor 140, the first force F1 having a first longitudinal component F1 L in a first direction parallel to the longitudinal axis XX, and a first radial component F1 R in a second direction orthogonal to the longitudinal axis XX, the first longitudinal component F1 L being greater than the first radial component F1 R,
- the second part 22 has a second bearing surface 2200 arranged to apply a second force F2 on the low pressure compressor 140, the second force F2 having a second longitudinal component F2L in the first direction, and a second radial component F2R in the second direction, the second radial component F2R being greater than the second longitudinal component F2L.
- the third part 23 provides the axially positioned support of the damper 2, via the first support surface 2321, since it is a downstream axial surface of the 'shock absorber 2 coming into contact with an upstream axial surface of the low pressure compressor 140.
- the second part 22 provides the radially positioned support of the shock absorber 2, via the second bearing surface 2200, since it is a radially outer surface of the damper 2 coming into contact with a radially inner surface of the low pressure compressor 140.
- the second bearing surface 2200 participates in the application of the second centrifugal force C2 on the low pressure compressor 140.
- it is the second lip 232 of the third part 23 which has the first bearing surface 2321, as can be seen in FIG. 4.
- the third part 23 comprises a depression 233, preferably annular.
- the depression 233 can be made at an external surface 2320 or an internal surface 2310 of the third part 23, upstream or downstream of the bulge 231, 232. In the embodiment illustrated in FIG. 5, the depression 233 extends upstream of the bulge.
- the depression 233 extends downstream of the bulge 231, 232, as illustrated in Figure 4, at an external surface 2320 of the third part 23, it provides a clearance which allows the damper 2 to avoid rub on one corner of the radial sealing wipers 1406.
- the depression 233 promotes the axial setting of the damper 2 between the fan 12 and the low pressure compressor 140, but also the sealing of the duct d 'flow of the primary air flow 111. Indeed, under the effect of the first centrifugal force C1, the first part 21 can thus be compressed downstream.
- At least one of the first part 21, the second part 22 and the third part 23 comprises an additional coating, configured to reduce the friction and / or the wear of the fan and / or the compressor. low pressure 140.
- This additional coating is fixedly mounted on an external surface of the damper 2, for example by gluing.
- the additional coating is of the dissipative and / or viscoelastic and / or damping type. It can in fact comprise a material from the range having the trade name “SMACTANE® ST” and / or “SMACTANE® SP”, for example a material of the “SMACTANE® ST 70” and / or “SMACTANE® SP 50” type. .
- the additional coating material advantageously has a coefficient of friction of between 0.3 and 0.07.
- the coating makes it possible in particular to increase the tangential stiffness of the damper 2 when, in operation, it applies the centrifugal forces C1, C2 so that the displacement of the fan 12 relative to the low pressure compressor 140, in the plane orthogonal to the 'longitudinal axis XX, or damped by energy dissipation by means of a viscoelastic shear of its coating.
- At least one of the first part 21, the second part 22 and the third part 23 is treated by dry lubrication, with a view to maintaining the value of the coefficient of friction between the damper 2 and the one and / or the other of the blower 12 and of the low-pressure compressor 140.
- This material with lubricating properties is for example of the MoS2 type.
- the damper 2 is configured to damp a displacement of the fan 12 relative to the low pressure compressor 140, in the plane orthogonal to the longitudinal axis X-X.
- the damper 2 is also configured to damp a displacement of any first rotor 12 relative to any second rotor 140, in a plane orthogonal to the longitudinal axis XX, as long as the first rotor 12 is movable in rotation relative to the casing 10 about the longitudinal axis XX and comprises a disc 120 as well as a plurality of blades 122 capable of pulsating while vibrating relative to the disc 120 during a rotation of the first rotor 12 relative to the housing 10, and that the second rotor 140 is also movable in rotation relative to the housing 10 about the longitudinal axis XX.
- the first rotor 12 can be a first stage of the high pressure compressor 142 or of the low pressure compressor 140, and the second rotor 140 be a second stage of said compressor 140, 142, successive to the first stage of compressor 140, 142, upstream or downstream of the latter.
- the first rotor 12 may be a first stage of a high pressure turbine 180 or of a low pressure turbine 182, and the second rotor 140 be a second stage of said turbine 180, 182, successive to the first turbine stage 180, 182, in upstream or downstream of the latter.
- the shock absorber 2 has a small footprint. Therefore, it can easily be integrated into existing turbomachines.
- the damper 2 provides significant tangential stiffness between the first rotor 12 and the second rotor 140. It thus stands out. of an excessively flexible damper which would only come to deform during a movement of the first rotor 12 relative to the second rotor 140, in the plane orthogonal to the longitudinal axis XX. On the contrary, shock absorber 2 dissipates such a displacement:
- the shock absorber 2 remains flexible enough to maximize the contact surfaces between said shock absorber 2 and the rotors 12, 140 on which it bears. To do this, the shock absorber 2 has a tangential rigidity greater than an axial rigidity and a radial rigidity.
- the contact forces between the damper 2 and the rotors 12, 140 can in particular be adjusted by means of additional coatings. At low frequencies, it is in fact necessary to ensure that the centrifugal forces C1, C2 exerted by the damper 2 on the rotors 12, 140 are not too great, in order to guarantee that the damper 2 can oscillate between a stuck state and a slippery state on the rotors 12, 140, and thus damping by friction.
- the centrifugal forces C1, C2 exerted by the damper 2 on the rotors 12, 140 are sufficiently large so that the preload of the damper 2 on the rotors 12, 140 is sufficient, in order to ensure that the damper 2 can be the viscoelastic shear seat.
- the wear of the rotors 12, 140 is in particular limited by treating the surfaces of the damper 2 bearing on the rotors 12, 140, for example to provide them with a coating with a low coefficient of friction.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1905734A FR3096731B1 (fr) | 2019-05-29 | 2019-05-29 | Ensemble pour turbomachine |
PCT/EP2020/064650 WO2020239808A1 (fr) | 2019-05-29 | 2020-05-27 | Ensemble pour turbomachine |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3976928A1 true EP3976928A1 (fr) | 2022-04-06 |
EP3976928B1 EP3976928B1 (fr) | 2023-08-23 |
Family
ID=68072683
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20728038.9A Active EP3976928B1 (fr) | 2019-05-29 | 2020-05-27 | Ensemble pour turbomachine et turbomachine |
Country Status (5)
Country | Link |
---|---|
US (1) | US11808169B2 (fr) |
EP (1) | EP3976928B1 (fr) |
CN (1) | CN114026312B (fr) |
FR (1) | FR3096731B1 (fr) |
WO (1) | WO2020239808A1 (fr) |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2517779B1 (fr) * | 1981-12-03 | 1986-06-13 | Snecma | Dispositif d'amortissement des aubes d'une soufflante de turbomachine |
FR2585069B1 (fr) * | 1985-07-16 | 1989-06-09 | Snecma | Dispositif de limitation du debattement angulaire d'aubes montees sur un disque de rotor de turbomachine |
US5205713A (en) * | 1991-04-29 | 1993-04-27 | General Electric Company | Fan blade damper |
US5820346A (en) * | 1996-12-17 | 1998-10-13 | General Electric Company | Blade damper for a turbine engine |
US7121801B2 (en) * | 2004-02-13 | 2006-10-17 | United Technologies Corporation | Cooled rotor blade with vibration damping device |
FR2915510B1 (fr) | 2007-04-27 | 2009-11-06 | Snecma Sa | Amortisseur pour aubes de turbomachines |
FR2923557B1 (fr) * | 2007-11-12 | 2010-01-22 | Snecma | Ensemble d'une aube de soufflante et de son amortisseur, amortisseur d'aube de soufflante et methode de calibrage de l'amortisseur |
FR2949142B1 (fr) * | 2009-08-11 | 2011-10-14 | Snecma | Cale amortisseuse de vibrations pour aube de soufflante |
FR2961553B1 (fr) * | 2010-06-18 | 2012-08-31 | Snecma | Secteur angulaire de redresseur pour compresseur de turbomachine, redresseur de turbomachine et turbomachine comprenant un tel secteur |
FR2961554B1 (fr) * | 2010-06-18 | 2012-07-20 | Snecma | Secteur angulaire de redresseur pour compresseur de turbomachine, redresseur de turbomachine et turbomachine comprenant un tel secteur |
US9151170B2 (en) * | 2011-06-28 | 2015-10-06 | United Technologies Corporation | Damper for an integrally bladed rotor |
FR3003301B1 (fr) * | 2013-03-14 | 2018-01-05 | Safran Helicopter Engines | Anneau de turbine pour turbomachine |
US20170226861A1 (en) * | 2014-10-15 | 2017-08-10 | Safran Aircraft Engines | Rotary assembly for a turbine engine comprising a self-supported rotor collar |
GB201506196D0 (en) * | 2015-04-13 | 2015-05-27 | Rolls Royce Plc | Rotor damper |
CN204941612U (zh) * | 2015-09-16 | 2016-01-06 | 中国航空工业集团公司沈阳发动机设计研究所 | 一种可压缩阻尼块 |
-
2019
- 2019-05-29 FR FR1905734A patent/FR3096731B1/fr active Active
-
2020
- 2020-05-27 CN CN202080045179.6A patent/CN114026312B/zh active Active
- 2020-05-27 WO PCT/EP2020/064650 patent/WO2020239808A1/fr unknown
- 2020-05-27 EP EP20728038.9A patent/EP3976928B1/fr active Active
- 2020-05-27 US US17/614,667 patent/US11808169B2/en active Active
Also Published As
Publication number | Publication date |
---|---|
FR3096731A1 (fr) | 2020-12-04 |
US20220228494A1 (en) | 2022-07-21 |
US11808169B2 (en) | 2023-11-07 |
CN114026312B (zh) | 2024-03-29 |
CN114026312A (zh) | 2022-02-08 |
EP3976928B1 (fr) | 2023-08-23 |
WO2020239808A1 (fr) | 2020-12-03 |
FR3096731B1 (fr) | 2021-05-07 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP3724455B1 (fr) | Dispositif amortisseur | |
EP1605139B1 (fr) | Turbomachine avec moyens de retenue axiale du rotor | |
EP2809883A1 (fr) | Aube pour soufflante de turboreacteur | |
FR3075284A1 (fr) | Dispositif amortisseur | |
CA2726018C (fr) | Rotor de soufflante pour une turbomachine | |
FR2978796A1 (fr) | Roue a aubes de turbomachine | |
EP2661542A1 (fr) | Procede d'amortissement de pale de turbine a gaz et amortisseur de vibration de mise en uvre | |
FR2927357A1 (fr) | Dispositif d'amortissement des vibrations entre deux aubes de roue aubagee de turbomachine | |
EP3976926B1 (fr) | Ensemble pour turbomachine avec amortisseur | |
EP3976928B1 (fr) | Ensemble pour turbomachine et turbomachine | |
EP3728794B1 (fr) | Dispositif amortisseur | |
FR3096729A1 (fr) | Ensemble pour turbomachine | |
FR3075253B1 (fr) | Dispositif amortisseur | |
FR3096732A1 (fr) | Ensemble pour turbomachine | |
WO2020239803A1 (fr) | Ensemble pour turbomachine | |
FR3096733A1 (fr) | Ensemble pour turbomachine | |
FR3096730A1 (fr) | Ensemble pour turbomachine | |
FR3075283B1 (fr) | Dispositif amortisseur | |
FR3075254B1 (fr) | Dispositif amortisseur | |
FR2712631A1 (fr) | Ailette de rotor et ensemble ailettes-disque de rotor comportant une telle ailette. | |
FR3102205A1 (fr) | Rotor de turbomachine à masselotte | |
FR2962481A1 (fr) | Amortisseur de vibrations a bras de levier pour aube d'un rotor de moteur a turbine a gaz | |
FR3099213A1 (fr) | Rotor de soufflante pour une turbomachine d’aeronef | |
EP4228964A1 (fr) | Ensemble d'attache pour une aube de turbomachine | |
FR3106615A1 (fr) | Ensemble pour turbomachine |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: UNKNOWN |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE |
|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE |
|
17P | Request for examination filed |
Effective date: 20211224 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
DAV | Request for validation of the european patent (deleted) | ||
DAX | Request for extension of the european patent (deleted) | ||
GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: GRANT OF PATENT IS INTENDED |
|
INTG | Intention to grant announced |
Effective date: 20230523 |
|
GRAS | Grant fee paid |
Free format text: ORIGINAL CODE: EPIDOSNIGR3 |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE PATENT HAS BEEN GRANTED |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
REG | Reference to a national code |
Ref country code: GB Ref legal event code: FG4D Free format text: NOT ENGLISH |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: EP |
|
REG | Reference to a national code |
Ref country code: IE Ref legal event code: FG4D Free format text: LANGUAGE OF EP DOCUMENT: FRENCH |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R096 Ref document number: 602020016280 Country of ref document: DE |
|
REG | Reference to a national code |
Ref country code: LT Ref legal event code: MG9D |
|
REG | Reference to a national code |
Ref country code: NL Ref legal event code: MP Effective date: 20230823 |
|
REG | Reference to a national code |
Ref country code: AT Ref legal event code: MK05 Ref document number: 1602801 Country of ref document: AT Kind code of ref document: T Effective date: 20230823 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20231124 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IS Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20231223 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SE Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20230823 Ref country code: RS Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20230823 Ref country code: PT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20231226 Ref country code: NO Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20231123 Ref country code: NL Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20230823 Ref country code: LV Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20230823 Ref country code: LT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20230823 Ref country code: IS Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20231223 Ref country code: HR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20230823 Ref country code: GR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20231124 Ref country code: FI Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20230823 Ref country code: AT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20230823 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: PL Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20230823 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: ES Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20230823 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SM Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20230823 Ref country code: RO Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20230823 Ref country code: ES Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20230823 Ref country code: EE Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20230823 Ref country code: DK Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20230823 Ref country code: CZ Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20230823 Ref country code: SK Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20230823 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R097 Ref document number: 602020016280 Country of ref document: DE |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20230823 |
|
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 20240419 Year of fee payment: 5 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20240418 Year of fee payment: 5 |
|
26N | No opposition filed |
Effective date: 20240524 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SI Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20230823 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 20240418 Year of fee payment: 5 |