US20050100258A1 - Arrangement for mounting two coaxial shaftlines - Google Patents
Arrangement for mounting two coaxial shaftlines Download PDFInfo
- Publication number
- US20050100258A1 US20050100258A1 US10/476,372 US47637204A US2005100258A1 US 20050100258 A1 US20050100258 A1 US 20050100258A1 US 47637204 A US47637204 A US 47637204A US 2005100258 A1 US2005100258 A1 US 2005100258A1
- Authority
- US
- United States
- Prior art keywords
- shaft
- bearing
- gear
- nut
- housing
- 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.)
- Abandoned
Links
- 125000006850 spacer group Chemical group 0.000 claims abstract description 6
- 238000007789 sealing Methods 0.000 claims description 8
- 230000000717 retained effect Effects 0.000 claims description 2
- 238000006073 displacement reaction Methods 0.000 claims 2
- 230000001174 ascending effect Effects 0.000 claims 1
- 238000009434 installation Methods 0.000 abstract description 2
- 230000005540 biological transmission Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 210000000078 claw Anatomy 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
- F02C7/06—Arrangements of bearings; Lubricating
-
- 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
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/16—Arrangement of bearings; Supporting or mounting bearings in casings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
- F02C7/32—Arrangement, mounting, or driving, of auxiliaries
Definitions
- This invention relates to an assembly for the installation of two coaxial shafts, particularly a so-called low pressure shaft as shown in FIG. 1 connecting the low pressure compressor 1 to the low pressure turbine 2 in a gas turbine, surrounded by a high pressure shaft connecting the high pressure compressor 3 to the high pressure turbine 4 .
- the internal shaft 15 projects beyond the front of the external shaft 16 (high pressure) and can finish at a shaft end 5 supporting a large volume fan 6 on which large radius blades are fitted to discharge air into an auxiliary stream 7 surrounding the main gas stream 8 , and if there is an accidental breakage in this fan, there will be a severe out-of-balance mass on the internal shaft 15 .
- some arrangements need to be made.
- a bearing 9 called the number 1 bearing right at the front of the internal shaft 15 may be made fusible or breakable, in other words it may be installed on a low resistance support 10 that breaks as soon as an out-of-balance mass develops, so that the resulting large forces that are then generated are not transmitted to the rest of the stator structure.
- the shaft end 5 is then free to tilt by moving under the effect of the out-of-balance mass until the assembly that it forms with the fan 6 moves into a new position in equilibrium in rotation and without necessarily causing any further damage until the machine stops.
- the shaft end 5 makes this movement tilting around a so-called bearing number 2 behind the previous bearing, that supports its back end and a main shaft in the internal shaft 15 .
- This bearing is denoted reference 17 . It thus controls the axial position of the internal shaft 15 .
- a movement control gear 20 designed particularly to start the machine and activated by a transmission shaft 25 perpendicular to the shafts 15 and 16 , must be placed between this bearing 17 and a so-called bearing number 3 (reference 18 ) that provides support to the forward end of the external shaft 16 .
- the previous shaft bearing 17 being as far backwards as possible to improve the dynamic resistance of the internal shaft 15 , is only separated from it by just sufficient space to contain the gear 20 .
- An assembly nut is screwed around the forward end of the external shaft 16 to hold it in place against this bearing 18 by stopping in contact on the bearing.
- This nut that extends forwards from the bearing 18 and on the movement control gear 20 , is difficult to access, particularly because a seal support sleeve must be placed behind the bearing 17 immediately in front of the nut, overlapping the forward end of the external shaft 16 and a portion of the internal shaft 15 to create a seal between them. Disassembly of the high pressure shaft 16 , before maintenance, is usually only possible after disassembling the machine in front of the nut, and particularly the fan 6 , so that it can be reached and unscrewed.
- the representative assembly of the invention comprises coaxial internal and external shafts, a forward part of the internal shaft projecting beyond a forward end of the external shaft, a sleeve surrounding the shafts and supporting a seal associated with each of the shafts, a bearing supporting the external shaft close to the forward end and a bearing retaining nut screwed around the forward end, characterized in that it comprises a spacer with an adjustment part slid around the external shaft and tightened between the nut and the bearing, and a sealing part arranged around the nut and on which the seal associated with the external shaft rubs.
- FIG. 1 is an overview of a gas turbine
- FIG. 2 shows an_assembly prior to the invention and in which the problems of access to the nut mentioned above were not solved;
- FIG. 3 shows an assembly conform with the invention
- FIG. 4 shows a view of another assembly conform with the invention.
- FIG. 2 shows a portion of the internal shaft 15 , the forward end of the external shaft 16 , one end of the number 2 bearing 17 , the number 3 bearing 18 , the assembly nut 19 of bearing 18 , the movement control gear 20 , a crown wheel 21 engaged with the gear 20 and retained between the external shaft 16 , the nut 19 and the bearing 18 to participate in the assembly of the bearing 18 as a thrust bearing, the seal support sleeve 22 , its two seals 23 and 24 rubbing on contiguous portions of shafts 15 and 16 ; and the environment of the gear 20 comprises a transmission shaft 25 connected in rotation to the gear 20 by splines 26 and engaged in a hub 27 of the gear 20 ; a pair of bearings 28 and 29 engaged around the hub 27 ; a housing 30 connected by screwing to an extension 31 of the sleeve 22 and (at right in the figure) to a casing 32 of the stator; and a shell 33 screwed to the housing 30 that retains the bearing 29 on the far end from gear 20 ,
- the attachment screws are not shown to simplify the drawing.
- the means of retaining the bearings 28 and 29 include nuts, thrust washers, force fitted sleeves, in a known manner.
- the bearing 28 is a ball bearing and the other bearing 29 is a roller bearing, without an internal ring and in which the rollers bear directly on the hub 27 .
- the seal support sleeve 22 completely separates the nut 19 from the annular space 13 between the shafts 15 and 16 .
- FIG. 3 illustrates a first embodiment of the invention and firstly shows a modification to the seal support sleeve, which in this case is assigned reference 38 and which has a conical shape, the seal 39 on the side of the high pressure shaft 16 now having a larger diameter than the unchanged seal 23 on the side of the low pressure shaft 15 ; the seal 39 does not rub on the actual shaft 16 , but rather on a sealing contact surface 41 of a spacer 40 integrated into the high pressure shaft 16 and being provided for this purpose with a thrust contact surface 42 inserted on the said shaft and compressed by the nut 19 between it and the crown wheel 21 .
- the result of this is that the sealing contact surface 41 and the sleeve 38 surround the nut 19 instead of covering it at the front and thus it becomes accessible from behind, using a tool with claws not shown that can be slid in the annular space 43 between the shafts 15 and 16 , and in that the nut 19 is at the forward end of the shaft 16 , the lip 14 that it surrounded having been replaced by the sealing contact surface 41 .
- the reference 44 is assigned to a locking part of the nut 19 that comprises crab teeth penetrating into the nut 19 and the external shaft 16 to prevent any relative rotation when it is put into place; it is in the form of a split ring and is made of an elastic material so that it can be opened to put it into place.
- Some arrangements may be proposed at the side of the gear 20 to adapt the structure to modify the shape of the seal support sleeve 38 ; there are the two bearings 28 and 29 of the hub support 27 of the gear 20 , the housing 30 fixed to the extension 31 of the seal support sleeve 38 and the casing 32 , but in this case the shell 33 is replaced by a different shell 45 that extends around the two bearings 28 and 29 , and still supports the thrust collar 35 forming the attachment to the housing 30 .
- the assembly is different from the assembly in FIG. 2 . It is made by fixing the housing 30 , and then consists of inserting the gear 20 fitted with the bearing closest to it (in this case 29 ) into the housing 30 , placing it on a thrust surface 50 at the bottom of the housing 30 , sliding the seal support sleeve 38 above the gear 20 and fixing it to the housing 30 .
- the shell 45 fitted with the bearing on the remote side of the gear 20 (in this case the ball bearing 28 ) is then inserted into the reaming in the housing 30 and around the hub 27 and the bearing 29 .
- the bearing 28 supports a spacer ring 51 that finally touches the other bearing 29 during this movement, pushes it back and thus lifts the gear 20 .
- the gear 20 engages with the crown wheel 21 .
- the transmission shaft 25 is finally installed.
- FIG. 4 represents a variant of this idea in which bearings 28 and 29 occupy the same positions as in the previous design and in which the shell 33 is also used; but the thrust collar 34 of the bearing 28 placed on the edge of the housing 30 is replaced by a collar 46 placed under it, and the collar 35 of the shell 33 with which it is in contact.
- the assembly is made approximately in the same way as before, except that the bearings 28 and 29 must both be put into place after the gear 20 has been put into place in the housing 30 .
- the innovation of the assembly according to the invention can be explained as follows.
- This movement to lift the seal support sleeve in the forward direction is no longer useful with the invention, and it is even impossible since the flared rear part of the seal support sleeve 38 would stop in contact with the teeth of the gear 20 .
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Mounting Of Bearings Or Others (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Sealing Devices (AREA)
- General Details Of Gearings (AREA)
- Gear Transmission (AREA)
Abstract
Description
- 1. Field of the Invention
- This invention relates to an assembly for the installation of two coaxial shafts, particularly a so-called low pressure shaft as shown in
FIG. 1 connecting the low pressure compressor 1 to thelow pressure turbine 2 in a gas turbine, surrounded by a high pressure shaft connecting thehigh pressure compressor 3 to thehigh pressure turbine 4. - 2. Description of Related Art
- In this type of machine, the internal shaft 15 (low pressure) projects beyond the front of the external shaft 16 (high pressure) and can finish at a
shaft end 5 supporting alarge volume fan 6 on which large radius blades are fitted to discharge air into anauxiliary stream 7 surrounding the main gas stream 8, and if there is an accidental breakage in this fan, there will be a severe out-of-balance mass on theinternal shaft 15. Thus, some arrangements need to be made. Firstly, a bearing 9 called the number 1 bearing right at the front of theinternal shaft 15 may be made fusible or breakable, in other words it may be installed on a low resistance support 10 that breaks as soon as an out-of-balance mass develops, so that the resulting large forces that are then generated are not transmitted to the rest of the stator structure. Theshaft end 5 is then free to tilt by moving under the effect of the out-of-balance mass until the assembly that it forms with thefan 6 moves into a new position in equilibrium in rotation and without necessarily causing any further damage until the machine stops. Theshaft end 5 makes this movement tilting around a so-calledbearing number 2 behind the previous bearing, that supports its back end and a main shaft in theinternal shaft 15. This bearing is denotedreference 17. It thus controls the axial position of theinternal shaft 15. - A
movement control gear 20, designed particularly to start the machine and activated by atransmission shaft 25 perpendicular to theshafts external shaft 16. The previous shaft bearing 17, being as far backwards as possible to improve the dynamic resistance of theinternal shaft 15, is only separated from it by just sufficient space to contain thegear 20. An assembly nut is screwed around the forward end of theexternal shaft 16 to hold it in place against this bearing 18 by stopping in contact on the bearing. This nut, that extends forwards from thebearing 18 and on themovement control gear 20, is difficult to access, particularly because a seal support sleeve must be placed behind thebearing 17 immediately in front of the nut, overlapping the forward end of theexternal shaft 16 and a portion of theinternal shaft 15 to create a seal between them. Disassembly of thehigh pressure shaft 16, before maintenance, is usually only possible after disassembling the machine in front of the nut, and particularly thefan 6, so that it can be reached and unscrewed. - Refer to
French patent 2 783 579 for a description of an assembly by which the nut can be unscrewed from behind using a special tool inserted into the annular space between the shafts, which is more convenient despite the fact that this space is narrow since there is then no need for any major disassembly of elements of the machine to be able to remove the high pressure shaft; but the selected assembly consists of screwing the nut in the external shaft whereas it is conventionally screwed around the shaft, which changes the entire design of the forward end of the shaft and it can introduce other disadvantages. In this case, another solution is proposed to provide easy access to the nut holding theexternal shaft 16 in place from behind without making any major change to the design; the narrow space around the nut makes a few modifications to surrounding parts of the machine necessary, but it will be seen that they are mainly applicable to sealing and movement control devices, for which the design is less restrictive. - In its most general form, the representative assembly of the invention comprises coaxial internal and external shafts, a forward part of the internal shaft projecting beyond a forward end of the external shaft, a sleeve surrounding the shafts and supporting a seal associated with each of the shafts, a bearing supporting the external shaft close to the forward end and a bearing retaining nut screwed around the forward end, characterized in that it comprises a spacer with an adjustment part slid around the external shaft and tightened between the nut and the bearing, and a sealing part arranged around the nut and on which the seal associated with the external shaft rubs.
- The advantages of this arrangement and other aspects of the invention will be discovered after reading the commentary on the following figures:
-
FIG. 1 , already described, is an overview of a gas turbine; -
FIG. 2 shows an_assembly prior to the invention and in which the problems of access to the nut mentioned above were not solved; -
FIG. 3 shows an assembly conform with the invention; and -
FIG. 4 shows a view of another assembly conform with the invention. -
FIG. 2 shows a portion of theinternal shaft 15, the forward end of theexternal shaft 16, one end of thenumber 2 bearing 17, thenumber 3 bearing 18, theassembly nut 19 ofbearing 18, themovement control gear 20, acrown wheel 21 engaged with thegear 20 and retained between theexternal shaft 16, thenut 19 and thebearing 18 to participate in the assembly of thebearing 18 as a thrust bearing, theseal support sleeve 22, its twoseals shafts gear 20 comprises atransmission shaft 25 connected in rotation to thegear 20 bysplines 26 and engaged in ahub 27 of thegear 20; a pair ofbearings hub 27; ahousing 30 connected by screwing to anextension 31 of thesleeve 22 and (at right in the figure) to acasing 32 of the stator; and ashell 33 screwed to thehousing 30 that retains thebearing 29 on the far end fromgear 20, while the other bearing 28 close to thegear 20 is driven by thehub 27 and slides in thehousing 30;collars bearing 28 close to thegear 20 and theshell 33 are applied in thrust on thehousing 30 and are screwed to it to keep thebearings hub 27. The attachment screws are not shown to simplify the drawing. The means of retaining thebearings bearing 28 is a ball bearing and theother bearing 29 is a roller bearing, without an internal ring and in which the rollers bear directly on thehub 27. - It is worthwhile mentioning the method of fitting the assembly onto the
gear 20 after thenut 19 has been screwed into place. Thegear 20, thebearing 28 adjacent to it and thehousing 30 are installed by screwing the housing onto thecasing 32, and theshell 33 and thebearing 29 are then installed by fixing the shell to thehousing 30, and theseal support sleeve 22 is fixed to thehousing 30 by sliding it backwards; finally thetransmission shaft 25 is inserted in thehub 27. It is seen that thenut 19, well surrounded by other parts, has become inaccessible unless major disassembly operations are carried out. Since theseal 24 rubs on alip 14 of theexternal shaft 16 that extends forwards from thenut 19 and the nut is screwed around thisshaft 16, theseal support sleeve 22 completely separates thenut 19 from theannular space 13 between theshafts -
FIG. 3 illustrates a first embodiment of the invention and firstly shows a modification to the seal support sleeve, which in this case is assignedreference 38 and which has a conical shape, theseal 39 on the side of thehigh pressure shaft 16 now having a larger diameter than theunchanged seal 23 on the side of thelow pressure shaft 15; theseal 39 does not rub on theactual shaft 16, but rather on a sealingcontact surface 41 of aspacer 40 integrated into thehigh pressure shaft 16 and being provided for this purpose with athrust contact surface 42 inserted on the said shaft and compressed by thenut 19 between it and thecrown wheel 21. - The result of this is that the sealing
contact surface 41 and thesleeve 38 surround thenut 19 instead of covering it at the front and thus it becomes accessible from behind, using a tool with claws not shown that can be slid in theannular space 43 between theshafts nut 19 is at the forward end of theshaft 16, thelip 14 that it surrounded having been replaced by the sealingcontact surface 41. Thereference 44 is assigned to a locking part of thenut 19 that comprises crab teeth penetrating into thenut 19 and theexternal shaft 16 to prevent any relative rotation when it is put into place; it is in the form of a split ring and is made of an elastic material so that it can be opened to put it into place. - Some arrangements may be proposed at the side of the
gear 20 to adapt the structure to modify the shape of theseal support sleeve 38; there are the twobearings hub support 27 of thegear 20, thehousing 30 fixed to theextension 31 of theseal support sleeve 38 and thecasing 32, but in this case theshell 33 is replaced by adifferent shell 45 that extends around the twobearings thrust collar 35 forming the attachment to thehousing 30. - The assembly is different from the assembly in
FIG. 2 . It is made by fixing thehousing 30, and then consists of inserting thegear 20 fitted with the bearing closest to it (in this case 29) into thehousing 30, placing it on athrust surface 50 at the bottom of thehousing 30, sliding theseal support sleeve 38 above thegear 20 and fixing it to thehousing 30. Theshell 45 fitted with the bearing on the remote side of the gear 20 (in this case the ball bearing 28) is then inserted into the reaming in thehousing 30 and around thehub 27 and thebearing 29. Thebearing 28 supports aspacer ring 51 that finally touches theother bearing 29 during this movement, pushes it back and thus lifts thegear 20. When thecollar 35 stops in contact with thehousing 30, thegear 20 engages with thecrown wheel 21. Thetransmission shaft 25 is finally installed. -
FIG. 4 represents a variant of this idea in whichbearings shell 33 is also used; but thethrust collar 34 of thebearing 28 placed on the edge of thehousing 30 is replaced by acollar 46 placed under it, and thecollar 35 of theshell 33 with which it is in contact. The assembly is made approximately in the same way as before, except that thebearings gear 20 has been put into place in thehousing 30. - The innovation of the assembly according to the invention can be explained as follows. The only way to access the
nut 19 from the front, which was the only possible way before, is to slide theseal support sleeve 22 forwards, separating it from thehousing 30. This movement to lift the seal support sleeve in the forward direction is no longer useful with the invention, and it is even impossible since the flared rear part of theseal support sleeve 38 would stop in contact with the teeth of thegear 20. Thus, it would also be a problem to assemble thehousing 30 if theseal support sleeve 38 were moved forwards, since its raised front edge would be stopped in contact with the flared rear part of the housing. Therefore, an assembly was adopted in which theseal support sleeve 38 is pulled clear backwards during assembly of thehousing 30 and thegear 20; itsattachment flange 47 stops in contact with thehousing 30 at the back, unlike the situation in the previous assembly. The assembly does not cause any difficulty provided that thegear 20 can be lowered to the bottom of thehousing 30 so that it does not collide with theattachment flange 47 or other parts of theseal support sleeve 38 before it is in its final position, which is perfectly possible if thebearing 28, which is a ball bearing designed to support thegear 20 in the vertical direction (or the radial direction in the gas turbine) is fixed to thehousing 30 later after having been inserted below the housing, then lifting thegear 20. - The assembly in
FIG. 3 with asingle shell 45 for the vertical support bearing 28 of thegear 20 and theother bearing 29, installed free to slide in the vertical direction, is simpler and probably more rigid, but it makes it necessary to change over the conventional positions of the bearings, and assembly can be more complicated due to the larger size of theshell 45. This is why the more ordinary assembly inFIG. 4 , in which the main difference in the method of assembly ofbearings collar 46, has many merits.
Claims (6)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/183,767 US7341380B2 (en) | 2001-05-03 | 2005-07-19 | Installation layout for two coaxial shaft lines |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0105900A FR2824362B1 (en) | 2001-05-03 | 2001-05-03 | ARRANGEMENT FOR MOUNTING TWO COAXIAL SHAFT LINES |
FR01/05900 | 2001-05-03 | ||
PCT/FR2002/001506 WO2002090723A1 (en) | 2001-05-03 | 2002-05-02 | Arrangement for mounting two coaxial shaftlines |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/183,767 Continuation US7341380B2 (en) | 2001-05-03 | 2005-07-19 | Installation layout for two coaxial shaft lines |
Publications (1)
Publication Number | Publication Date |
---|---|
US20050100258A1 true US20050100258A1 (en) | 2005-05-12 |
Family
ID=8862927
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/476,372 Abandoned US20050100258A1 (en) | 2001-05-03 | 2002-05-02 | Arrangement for mounting two coaxial shaftlines |
US11/183,767 Expired - Lifetime US7341380B2 (en) | 2001-05-03 | 2005-07-19 | Installation layout for two coaxial shaft lines |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/183,767 Expired - Lifetime US7341380B2 (en) | 2001-05-03 | 2005-07-19 | Installation layout for two coaxial shaft lines |
Country Status (8)
Country | Link |
---|---|
US (2) | US20050100258A1 (en) |
EP (1) | EP1255023B1 (en) |
JP (1) | JP4172579B2 (en) |
CA (1) | CA2445770C (en) |
DE (1) | DE60208108T2 (en) |
FR (1) | FR2824362B1 (en) |
RU (1) | RU2295043C2 (en) |
WO (1) | WO2002090723A1 (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20060277920A1 (en) * | 2005-02-11 | 2006-12-14 | Snecma | Twin spool turbine engine with power take-off means on the low-pressure and high-pressure rotors, power take-off module for the turbine engine and method of assembling the turbine engine |
US20090003748A1 (en) * | 2006-01-06 | 2009-01-01 | Rolls-Royce Plc | Bearing Race |
US20130280063A1 (en) * | 2012-04-23 | 2013-10-24 | General Electric Company | Dual spring bearing support housing |
JP2014518354A (en) * | 2011-07-04 | 2014-07-28 | スネクマ | Turbine engine drive shaft device |
US20170044987A1 (en) * | 2014-04-29 | 2017-02-16 | Safran Aircraft Engines | Modular assembly for a turbine engine |
US9970324B2 (en) | 2012-05-02 | 2018-05-15 | Snecma | Tool and method for frontal unscrewing of a link nut in a twin-spool turbine |
US10458237B2 (en) * | 2015-10-22 | 2019-10-29 | Nidec Motor Corporation | Sealing sleeve for geared shaft of gearmotor assembly |
US11555521B2 (en) * | 2013-07-29 | 2023-01-17 | Ge Avio S.R.L. | Gearbox and disassembly method for disengaging a drive shaft in such a gearbox |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6887038B2 (en) * | 2003-09-02 | 2005-05-03 | General Electric Company | Methods and apparatus to facilitate sealing between rotating turbine shafts |
FR2907167B1 (en) * | 2006-10-13 | 2011-11-18 | Snecma | GEARBOX DRIVE SHAFT OF AUXILIARY MACHINES OF A TURBOJET ENGINE; MODULAR SUPPLEMENTARY AUXILIARY MACHINE |
FR2917783B1 (en) * | 2007-06-25 | 2013-04-12 | Snecma | ENGINE SHAFT CONNECTION SYSTEM WITH SELF-EXTRACTOR NUT |
FR2920191B1 (en) * | 2007-08-23 | 2013-11-22 | Snecma | GAS TURBINE ENGINE WITH DRIVING MEANS FOR THE ACCESSORIES HOUSING AND METHOD OF MOUNTING THE SAME |
FR3007458B1 (en) * | 2013-06-21 | 2017-11-10 | Snecma | IMPROVED TURBOMACHINE INTERMEDIATE CASE AND ACCESSORY BOX DRIVE ASSEMBLY |
RU2711895C2 (en) * | 2017-06-19 | 2020-01-23 | Публичное акционерное общество "ОДК-Уфимское моторостроительное производственное объединение" | Double-flow jet turbine engine |
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US2932443A (en) * | 1956-08-17 | 1960-04-12 | United Aircraft Corp | Accessory drive |
US4201426A (en) * | 1978-04-27 | 1980-05-06 | General Electric Company | Bearing clamping assembly for a gas turbine engine |
US5201844A (en) * | 1991-09-09 | 1993-04-13 | General Electric Company | Rotor and bearing assembly |
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FR935401A (en) * | 1945-06-21 | 1948-06-18 | ||
GB1085619A (en) * | 1966-03-09 | 1967-10-04 | Rolls Royce | Gas turbine engine |
GB1130279A (en) * | 1967-02-28 | 1968-10-16 | Rolls Royce | Bearing assembly |
US4456425A (en) * | 1980-11-20 | 1984-06-26 | General Electric Company | Modular inlet gearbox for a gas turbine engine |
FR2637335B1 (en) * | 1988-09-14 | 1990-11-30 | Snecma | COUPLING OF A SHAFT IN A TURBOMACHINE BEARING SUPPORT AND DECOUPLING METHOD |
US4973221A (en) * | 1989-04-17 | 1990-11-27 | General Electric Company | Gas turbine engine motor assembly |
FR2783579B1 (en) * | 1998-09-17 | 2000-11-03 | Snecma | RETAINING ARRANGEMENT FOR A BEARING, IN PARTICULAR FOR A HIGH PRESSURE COMPRESSOR SHAFT |
FR2857708B1 (en) * | 2003-07-15 | 2005-09-23 | Snecma Moteurs | IMPROVED DEVICE FOR FASTENING A MOTOR SHAFT ON A BEARING BRACKET |
-
2001
- 2001-05-03 FR FR0105900A patent/FR2824362B1/en not_active Expired - Fee Related
-
2002
- 2002-05-02 US US10/476,372 patent/US20050100258A1/en not_active Abandoned
- 2002-05-02 DE DE60208108T patent/DE60208108T2/en not_active Expired - Lifetime
- 2002-05-02 WO PCT/FR2002/001506 patent/WO2002090723A1/en active Application Filing
- 2002-05-02 JP JP2002587765A patent/JP4172579B2/en not_active Expired - Lifetime
- 2002-05-02 RU RU2003134961/06A patent/RU2295043C2/en active
- 2002-05-02 EP EP02291097A patent/EP1255023B1/en not_active Expired - Lifetime
- 2002-05-02 CA CA002445770A patent/CA2445770C/en not_active Expired - Lifetime
-
2005
- 2005-07-19 US US11/183,767 patent/US7341380B2/en not_active Expired - Lifetime
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
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US2932443A (en) * | 1956-08-17 | 1960-04-12 | United Aircraft Corp | Accessory drive |
US4201426A (en) * | 1978-04-27 | 1980-05-06 | General Electric Company | Bearing clamping assembly for a gas turbine engine |
US5201844A (en) * | 1991-09-09 | 1993-04-13 | General Electric Company | Rotor and bearing assembly |
Cited By (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7552591B2 (en) * | 2005-02-11 | 2009-06-30 | Snecma | Twin spool turbine engine with power take-off means on the low-pressure and high-pressure rotors, and power take-off module for the turbine engine |
US20060277920A1 (en) * | 2005-02-11 | 2006-12-14 | Snecma | Twin spool turbine engine with power take-off means on the low-pressure and high-pressure rotors, power take-off module for the turbine engine and method of assembling the turbine engine |
US20090003748A1 (en) * | 2006-01-06 | 2009-01-01 | Rolls-Royce Plc | Bearing Race |
US8734023B2 (en) * | 2006-01-06 | 2014-05-27 | Rolls-Royce Plc | Bearing race |
US9771968B2 (en) | 2011-07-04 | 2017-09-26 | Snecma | Turbine engine drive shaft device |
JP2014518354A (en) * | 2011-07-04 | 2014-07-28 | スネクマ | Turbine engine drive shaft device |
US10001028B2 (en) * | 2012-04-23 | 2018-06-19 | General Electric Company | Dual spring bearing support housing |
US20130280063A1 (en) * | 2012-04-23 | 2013-10-24 | General Electric Company | Dual spring bearing support housing |
US9970324B2 (en) | 2012-05-02 | 2018-05-15 | Snecma | Tool and method for frontal unscrewing of a link nut in a twin-spool turbine |
US10968779B2 (en) | 2012-05-02 | 2021-04-06 | Safran Aircraft Engines | Tool and method for frontal unscrewing of a link nut in a twin-spool turbine |
US11555521B2 (en) * | 2013-07-29 | 2023-01-17 | Ge Avio S.R.L. | Gearbox and disassembly method for disengaging a drive shaft in such a gearbox |
US20170044987A1 (en) * | 2014-04-29 | 2017-02-16 | Safran Aircraft Engines | Modular assembly for a turbine engine |
US10487747B2 (en) * | 2014-04-29 | 2019-11-26 | Safran Aircraft Engines | Modular assembly for a turbine engine |
US10458237B2 (en) * | 2015-10-22 | 2019-10-29 | Nidec Motor Corporation | Sealing sleeve for geared shaft of gearmotor assembly |
Also Published As
Publication number | Publication date |
---|---|
WO2002090723A1 (en) | 2002-11-14 |
US7341380B2 (en) | 2008-03-11 |
US20050249443A1 (en) | 2005-11-10 |
RU2295043C2 (en) | 2007-03-10 |
DE60208108D1 (en) | 2006-01-26 |
FR2824362B1 (en) | 2003-09-05 |
EP1255023B1 (en) | 2005-12-21 |
CA2445770A1 (en) | 2002-11-14 |
DE60208108T2 (en) | 2006-08-31 |
EP1255023A1 (en) | 2002-11-06 |
JP2004525298A (en) | 2004-08-19 |
CA2445770C (en) | 2009-12-15 |
FR2824362A1 (en) | 2002-11-08 |
JP4172579B2 (en) | 2008-10-29 |
RU2003134961A (en) | 2005-05-10 |
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