EP3891362A1 - Rotor de turbomachine avec écrou d'amortissement - Google Patents
Rotor de turbomachine avec écrou d'amortissementInfo
- Publication number
- EP3891362A1 EP3891362A1 EP19835436.7A EP19835436A EP3891362A1 EP 3891362 A1 EP3891362 A1 EP 3891362A1 EP 19835436 A EP19835436 A EP 19835436A EP 3891362 A1 EP3891362 A1 EP 3891362A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- rotor
- nut
- threaded
- stop
- tapped
- 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.)
- Pending
Links
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
- F01D5/02—Blade-carrying members, e.g. rotors
- F01D5/023—Blade-carrying members, e.g. rotors of the screw type
-
- 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
- F01D5/02—Blade-carrying members, e.g. rotors
- F01D5/026—Shaft to shaft connections
-
- 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
- F01D5/02—Blade-carrying members, e.g. rotors
- F01D5/027—Arrangements for balancing
-
- 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
- F01D5/02—Blade-carrying members, e.g. rotors
- F01D5/10—Anti- vibration means
-
- 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
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/10—Suppression of vibrations in rotating systems by making use of members moving with the system
- F16F15/14—Suppression of vibrations in rotating systems by making use of members moving with the system using masses freely rotating with the system, i.e. uninvolved in transmitting driveline torque, e.g. rotative dynamic dampers
- F16F15/1485—Suppression of vibrations in rotating systems by making use of members moving with the system using masses freely rotating with the system, i.e. uninvolved in transmitting driveline torque, e.g. rotative dynamic dampers the rotation being unlimited with respect to driving means
- F16F15/1492—Suppression of vibrations in rotating systems by making use of members moving with the system using masses freely rotating with the system, i.e. uninvolved in transmitting driveline torque, e.g. rotative dynamic dampers the rotation being unlimited with respect to driving means with a dry-friction connection
-
- 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
- F05D2240/55—Seals
-
- 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
- F05D2240/60—Shafts
-
- 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
- F05D2240/60—Shafts
- F05D2240/61—Hollow
-
- 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
-
- 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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D1/00—Couplings for rigidly connecting two coaxial shafts or other movable machine elements
- F16D1/06—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end
- F16D1/076—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end by clamping together two faces perpendicular to the axis of rotation, e.g. with bolted flanges
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T50/00—Aeronautics or air transport
- Y02T50/60—Efficient propulsion technologies, e.g. for aircraft
Definitions
- the present invention relates to a turbomachine rotor as well as a method of managing vibrations within a turbomachine rotor.
- the components of a turbomachine rotor are subjected to dynamic forces of vibratory origin during the operation of the turbomachine.
- the most used strategy to control the vibrational levels of a structure is to provide it with damping.
- a first solution conventionally used is the addition of an annular metal rod split in a groove of the one-piece component subjected to vibrations, so as to produce a damping by friction.
- the vibratory movements of the component generate friction in the area of interface with the rod which dissipate the energy.
- the disadvantage of such a solution is that it reduces the mechanical strength of the component by machining a groove, the rod can moreover wear out prematurely due to friction.
- a second known solution is the use of damping coatings of the viscoelastic, elastomeric or silicone-based type. In this case, damping is achieved by the coating itself.
- Such a solution is notably known from document FR 2 979 681, in the name of the Applicant.
- Such a solution cannot be used when the operating temperatures are high.
- such a solution is difficult to use when the component is subjected to a large centrifugal field, which can cause the release of the visco-elastic coating.
- the invention aims to remedy the aforementioned drawbacks, in a simple, inexpensive and reliable manner.
- the invention relates to a turbomachine rotor, in particular for an aircraft, characterized in that it comprises a threaded or tapped part and a damping nut screwed onto the threaded or tapped part so as to allow friction. threads of the nut and of the threaded or tapped part with respect to each other in the event of vibration of the rotor.
- the friction generated at the engaged threads dissipates the energy and dampens the vibrations of the rotor.
- the invention can be applied to any rotating part or rotor, in particular when said rotor is in one piece.
- the nut is not used to hold a component, as is conventionally the case on a screwed assembly.
- the damping nut is preferably located in an area of the rotor which has vibratory displacements to be damped. This area can be defined through numerical analyzes, for example tors of finite element analyzes, or tors of laboratory tests. It will be noted that the addition of the damping nut leads to a modification of the natural frequencies of the assembly. A verification of the frequency positioning can be carried out in order to ensure that the modification of the natural frequency remains acceptable.
- Such a damping solution can be used even in the case of environments with high temperatures, with a limited risk of wear of the nut and the threaded or tapped part.
- Such a solution can be used for a rotor having high rotational speeds due to its ability to operate under centrifugal forces.
- the threaded or tapped part may include an end zone comprising a toothing. Parts with teeth generate vibrations during operation. The implementation of the invention at the level of such parts makes it possible to deal with these vibrational phenomena.
- the threads of the nut can be located axially opposite the external toothing, so that the friction allowing vibration damping occurs near the external toothing, at which level the vibrational phenomena are important.
- the number of threads of the nut engaged with the threaded or tapped part may be at least five.
- the number of threads can vary depending on the diameter of the nut and the threaded or tapped part, and the materials used.
- the nut may include a stop capable of coming axially to bear on a stop complementary to the threaded or tapped part.
- Said stopper makes it possible to position the nut axially with respect to the threaded or tapped part and to dissipate additional energy, so as to further improve the damping of vibrations.
- the axial term is defined relative to the axis of rotation of the rotor, which can be confused with the axis of the nut and / or the axis of the turbomachine.
- the nut stop can be formed by a radially extending flange, the stop of the threaded part being formed by an end surface or radial shoulder.
- An elastically deformable seal can be fitted between the nut and the threaded or tapped part of the rotor.
- the deformations of the joint make it possible to dissipate additional energy, so as to further improve the damping of vibrations.
- Said seal can be an O-ring.
- the rotor may comprise a hollow rotary shaft and an annular coupling part mounted around the shaft and coupled in rotation to the latter, the directory coupling part forming the threaded or tapped part.
- the shaft and the coupling part can be made in one piece.
- the coupling part can be screwed onto the shaft, axial retaining means axially holding the coupling part relative to the shaft.
- the axial retaining means may include an axially deformable member.
- Said axially deformable member is for example a deformable seal.
- the axial retaining means may include a nut and a lock nut.
- the axially deformable member can be interposed axially between the nut and the lock nut, on the one hand, and the coupling part, on the other hand, so as to keep the coupling member in abutment on an axial stop. of the tree.
- the deformable joint may have a U-shaped section.
- the coupling part can comprise a tubular zone extending axially and surrounding the axial retaining means.
- Such a structure is compact while allowing easy access to the axial retaining means in order to facilitate in particular the assembly and disassembly of the assembly.
- the invention also relates to a method of managing vibrations within a turbomachine rotor, characterized in that it consists in screwing a damping nut on a threaded or tapped part of the rotor so as to allow friction of the threads. of the nut and of the threaded or tapped part with respect to each other in the event of vibration of the rotor.
- the location area of the nut can be determined by a vibration analysis of the rotor in operation.
- the aforementioned nut may include a stop capable of coming to bear axially on a stop complementary to the threaded or tapped part, the nut stop being formed by a flange extending radially, the stop of the threaded part being formed by an end surface or a radial shoulder, the threaded or tapped part comprising an end zone comprising a toothing.
- FIG. 1 is an axial sectional view of a part of a rotor according to an embodiment of the invention
- FIG. 2 is a perspective view, partially broken away, of part of the rotor of FIG. 1;
- FIG. 3 is a view corresponding to FIG. 1, illustrating another embodiment of the invention.
- Figures 1 and 2 illustrate a rotor 1 of a turbomachine according to a first embodiment of the invention.
- This comprises a hollow rotary shaft 2 of axis X.
- An annular coupling part 3 is mounted around the shaft 2 and coupled in rotation to the latter.
- Part 3 comprises an end zone comprising an external toothing 4, a radial end surface 5 and a threaded part 6.
- the end zone of the coupling part comprises a recess 7 situated axially between the radial surface 5 and the threaded part 6.
- upstream and downstream are defined relative to the direction of the flow of gas within the turbomachine.
- axial and radiai are defined with respect to the axis X of the rotor 1, which is here merged with the axis X of the turbomachine.
- the rotor 1 further comprises a nut 8 comprising a threaded zone 9, cooperating with the threaded zone 6 of the coupling part 3.
- the number of threads of the nut 8 in engagement with the threads of the threaded zone 6 is at least equal to five.
- the threads 9 of the nut 8 and the threaded area 6 are located axially opposite the external toothing 4.
- the nut 8 further comprises a flange 10 extending radially outward, bearing on the radial surface 5 of the end of the coupling part 3.
- the friction of the flange 10 on the radial surface 5 makes it possible to dissipate additional energy, so as to further improve the damping of vibrations.
- the radially internal surface 11 of the nut 8 is conical and widens downstream.
- Part 3 can be screwed onto the shaft 2.
- Part 3 can be held axially at the bottom of the screw or against an axial stop of the shaft 2, by means of retaining means axial 13.
- These means 13 comprise a seal 14 of U-shaped section and axially deformable, a nut 15 and a lock nut 16.
- the seal 14 is interposed axially between the nut 15 and a bearing surface 3a formed by a shoulder of the part 3. The seal 14 thus exerts a force tending to press the part 3 against the corresponding axial stop of the shaft 2.
- Part 3 comprises an upstream tubular zone 3b surrounding the axial retaining means 13.
- the component 3 undergoes local vibrations located mainly in parts 4,5 and 6. These vibrations are damped by the friction generated at the threads engaged by the nut 8 and the threaded part 6, allow the dissipation of energy and the damping of the vibrations of the component 3.
- a elastically deformable O-ring 12 can be housed between the nut 8 and the downstream end of the coupling part 3, said seal 12 being housed partly in the recess 7 of the coupling part 3.
- the seal 12 is located axially between the flange 10 and the threaded part 9 of the nut 8.
- the deformations of the seal 12 make it possible to dissipate additional energy, so as to further improve the damping of vibrations.
- the nut 8 is not used to hold a component, as is conventionally the case on a screwed assembly.
- the damping nut 8 is preferably located in an area of the rotor 1 which has vibratory displacements to be damped. This zone can be defined through digital analyzes, for example a finite element analysis, or laboratory tests.
- damping nut 8 leads to a modification of the natural frequencies of the assembly.
- a verification of the frequency positioning can be carried out in order to ensure that the modification of the natural frequency remains acceptable.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Aviation & Aerospace Engineering (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1872559A FR3089585B1 (fr) | 2018-12-07 | 2018-12-07 | Rotor de turbomachine |
| PCT/FR2019/000197 WO2020115373A1 (fr) | 2018-12-07 | 2019-12-03 | Rotor de turbomachine avec écrou d'amortissement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP3891362A1 true EP3891362A1 (fr) | 2021-10-13 |
Family
ID=66530181
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19835436.7A Pending EP3891362A1 (fr) | 2018-12-07 | 2019-12-03 | Rotor de turbomachine avec écrou d'amortissement |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US11746657B2 (fr) |
| EP (1) | EP3891362A1 (fr) |
| CN (1) | CN113423920B (fr) |
| FR (1) | FR3089585B1 (fr) |
| WO (1) | WO2020115373A1 (fr) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US12517843B2 (en) * | 2022-01-21 | 2026-01-06 | Synaptics Incorporated | Third party applications for a network-capable docking station |
| US12442303B1 (en) | 2024-04-10 | 2025-10-14 | General Electric Company | Method of mitigating rotor bow in a turbine engine rotor |
| US12467365B1 (en) * | 2025-01-27 | 2025-11-11 | Pratt & Whitney Canada Corp. | In situ balancing mass(es) for aircraft powerplant |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5205189A (en) * | 1990-12-17 | 1993-04-27 | General Electric Company | Engine shaft balance assembly |
| FR2949138A1 (fr) * | 2009-08-13 | 2011-02-18 | Snecma | Turbomachine comportant des moyens d'anti-rotation d'un ecrou de palier |
| WO2015084467A2 (fr) * | 2013-09-19 | 2015-06-11 | Obermeyer Henry K | Fixation de rotor de machine hydromotrice |
Family Cites Families (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2633023B1 (fr) * | 1988-06-15 | 1992-11-27 | Snecma | Dispositif et procede d'accouplement d'un arbre de turbine sur un tourillon |
| US4973221A (en) * | 1989-04-17 | 1990-11-27 | General Electric Company | Gas turbine engine motor assembly |
| US5537814A (en) * | 1994-09-28 | 1996-07-23 | General Electric Company | High pressure gas generator rotor tie rod system for gas turbine engine |
| US5931051A (en) * | 1996-02-16 | 1999-08-03 | Ott; Vern D. | Vibration dampener for a rotating shaft |
| US6024615A (en) * | 1998-07-22 | 2000-02-15 | Brunswick Corporation | Vibration absorbing apparatus for a rotating system |
| US6747378B2 (en) * | 2001-08-20 | 2004-06-08 | Beacon Power Corporation | Dual stiffness bearing damping system |
| DE10239941A1 (de) * | 2002-03-05 | 2003-04-03 | Abb Turbo Systems Ag Baden | Torsionsschwingungsdämpfer für einen Turbolader |
| US7510380B2 (en) * | 2004-07-13 | 2009-03-31 | Honeywell International Inc. | Non-parallel spacer for improved rotor group balance |
| US20070022735A1 (en) * | 2005-07-29 | 2007-02-01 | General Electric Company | Pto assembly for a gas turbine engine |
| JP4985026B2 (ja) * | 2007-03-28 | 2012-07-25 | 株式会社デンソー | 緩衝装置 |
| GB2463453B (en) * | 2008-09-06 | 2012-08-08 | Cummins Turbo Tech Ltd | Turbomachine |
| FR2963062B1 (fr) * | 2010-07-20 | 2012-08-31 | Snecma | Assemblage entre un tourillon d'arbre de compresseur et un pignon conique pour l'entrainement d'un boitier d'accessoires d'une turbomachine |
| FR2979681B1 (fr) | 2011-09-05 | 2014-05-16 | Snecma | Turbomachine comportant un film fluide d'amortissement d'un palier de guidage d'un arbre de turbomachine et procede de reglage de l'epaisseur d'un tel film fluide d'amortissement |
| US8979502B2 (en) * | 2011-12-15 | 2015-03-17 | Pratt & Whitney Canada Corp. | Turbine rotor retaining system |
| US9140133B2 (en) * | 2012-08-14 | 2015-09-22 | United Technologies Corporation | Threaded full ring inner air-seal |
| EP2860405B1 (fr) * | 2013-10-14 | 2016-05-25 | Techspace Aero S.A. | Système amortisseur piézoélectrique pour rotor de turbomachine axiale |
| DE102014001061A1 (de) * | 2014-01-28 | 2015-07-30 | Lucas Automotive Gmbh | Scheibenbremse umfassend eine Schwingungsdämpfungseinrichtung mit einer Zusatzmasse und Bausatz mit einer derartigen Scheibenbremse |
| FR3033890B1 (fr) * | 2015-03-20 | 2019-08-23 | Safran Aircraft Engines | Fixation d'un disque fan a un arbre d'entrainement |
| US10883424B2 (en) * | 2016-07-19 | 2021-01-05 | Pratt & Whitney Canada Corp. | Multi-spool gas turbine engine architecture |
-
2018
- 2018-12-07 FR FR1872559A patent/FR3089585B1/fr active Active
-
2019
- 2019-12-03 CN CN201980085664.3A patent/CN113423920B/zh active Active
- 2019-12-03 US US17/311,609 patent/US11746657B2/en active Active
- 2019-12-03 WO PCT/FR2019/000197 patent/WO2020115373A1/fr not_active Ceased
- 2019-12-03 EP EP19835436.7A patent/EP3891362A1/fr active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5205189A (en) * | 1990-12-17 | 1993-04-27 | General Electric Company | Engine shaft balance assembly |
| FR2949138A1 (fr) * | 2009-08-13 | 2011-02-18 | Snecma | Turbomachine comportant des moyens d'anti-rotation d'un ecrou de palier |
| WO2015084467A2 (fr) * | 2013-09-19 | 2015-06-11 | Obermeyer Henry K | Fixation de rotor de machine hydromotrice |
Non-Patent Citations (1)
| Title |
|---|
| See also references of WO2020115373A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2020115373A1 (fr) | 2020-06-11 |
| US11746657B2 (en) | 2023-09-05 |
| CN113423920B (zh) | 2023-08-11 |
| FR3089585A1 (fr) | 2020-06-12 |
| CN113423920A (zh) | 2021-09-21 |
| FR3089585B1 (fr) | 2021-09-17 |
| US20220034228A1 (en) | 2022-02-03 |
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