摘要:
An epicyclic gear system (36) includes a sun gear (42), a ring gear (40), and two or more star gear assemblies enmeshed between the sun gear and the ring gear. Each star gear assembly includes a star gear (38) and a journal bearing (44) supportive of the star gear. The journal bearing includes one or more lubricant passageways (54, 56) to deliver a flow of lubricant to a selected location of the star gear assembly, wherein a first cross-sectional area of a lubricant passage of a first journal bearing of the two or more star gear assemblies is greater than a second cross-sectional area of the corresponding lubricant passage of a second journal bearing of the two or more star gear assemblies.
摘要:
L'invention concerne un système de contrôle (40) actif de jeu radial (44) autour d'une rangée annulaire d'aubes rotoriques (34) de turbomachine, notamment des aubes rotoriques (34) d'un compresseur basse-pression de turboréacteur d'avion. Le système (40) comporte une rangée annulaire d'aubes rotoriques (34) ; un carter externe (26) autour de la rangée d'aubes rotoriques (34) ; un jeu radial (44) entre les aubes rotoriques (34) et le carter externe (26) ; un circuit d'huile (24) adapté pour récupérer les calories d'une réduction tel un train épicycloïdal entraînant la soufflante. Le circuit d'huile (24) comprend un module de dilatation (46) configuré pour être dilaté par les calories récupérées par l'huile. Ce module de dilatation (46) est placé à l'intérieur du carter (26) de sorte à en moduler le diamètre autour des aubes rotoriques (34). L'invention propose également une turbomachine tel un turboréacteur.
摘要:
The present invention relates to a method for detecting performance of the lubricant cooler in aircraft auxiliary power unit APU, comprising: acquiring APU-related messages within a time period; obtaining the operation parameters of the (APU) lubricant cooler, the operation parameters comprise: lubricant temperature (OT) and load compressor inlet temperature (LCIT); the revised lubricant temperature (OT) is obtained by the following formula: the revised lubricant temperature = lubricant temperature (OTA) - the load compressor inlet temperature (LCIT); determining the performance of the APU lubricant cooler is in stable phase, decline phase or malfunction phase according to the change trend of the revised lubricant temperature (OT) with respect to time.
摘要:
A fuel system (200) for use with a gas turbine engine (20) with a fuel flow (210) and an oil flow (222) includes a fuel-oil cooler (202) in fluid communication with the fuel flow and the oil flow, the fuel-oil cooler to transfer heat between the fuel flow and the oil flow, a fuel filter (204) associated with the fuel-oil cooler, the fuel filter in fluid communication with the fuel flow, and an electric heating element (230; 232) disposed adjacent to at least one of the fuel-oil cooler and the fuel filter.
摘要:
A fluid circulation system (150) may comprise a main pump (174) configured to provide oil to a journal bearing (120). An auxiliary system (200) including a pump system (204) may be configured to provide oil to the journal bearing (120). A manifold (190) may be configured to mix the oil from the main pump (174) with oil from the auxiliary system (200). A journal delivery line (170) may be configured to deliver the oil from the manifold (190) to the journal bearing (120).
摘要:
Disclosed is a method for constructing a double walled tube assembly, comprising welding a first axial end of a first tube (432) to a first sub-fitting (372) of a first fitting (354), sliding a second tube (436) over the first sub-fitting (372) and the first tube (432), sliding a second sub-fitting (376;776;976) of the first fitting over the first sub-fitting (372) such that the first and second sub-fittings (372;376;776;976) are co-axial, welding a first axial end of the second tube (436) to the second sub-fitting (376;776;976), and welding the second sub-fitting (376;776;976) to the first sub-fitting (372). An assembly includes a first fitting (354) that includes a first sub-fitting (372) and a second sub-fitting (376;776;976), a first tube (432) having a first axial end that is welded to the first sub-fitting (372), and a second tube (436) having a first axial end that is welded to the second sub-fitting (376;776;976), where the first tube (432) is nested within the second tube (436), where the first sub-fitting (372) is welded to the second sub-fitting (376;776;976).
摘要:
A geared turbofan engine (20) includes a first spool (32) including a first compressor (52) and a first turbine (54). The first compressor (52) is immediately before a combustor (56) and the first turbine (54) is immediately after the combustor (56). A second spool (30) includes at least a second turbine (46) disposed axially aft of the first turbine (54). A first tower shaft (64) is engaged to drive the high speed spool (32). A second tower shaft (66) engaged to be driven by the second spool (30). A starter (76) is engaged to drive the first tower shaft (64). An accessory gear box (62) is driven by the second tower shaft (66). A first clutch (72) is disposed between the first tower shaft (64) and the starter (76). The first clutch (72) is configured to enable the starter (76) to drive the high speed spool (32). A second clutch (74) is disposed between the second tower shaft (66) and the accessory gear box (62), the second clutch (74) configured to enable the second spool (30) to drive the accessory gear box (62). A gas turbine engine (20) and a method of operating a gas turbine engine (20) are also disclosed.
摘要:
A method is provided involving a gas turbine engine system (20). The method includes configuring a plug (32) within a fluid passage (24) in the gas turbine engine system (20), where the plug (32) is between first and second portions (34, 36) of the fluid passage (24). Material (28) is removed from an interior surface (30) of the fluid passage (24) in the first portion (34) of the fluid passage (24) to provide removed material (28), where the plug (32) substantially prevents the removed material (28) from entering the second portion (36) of the fluid passage (24). The removed material (28) is directed out of the fluid passage (24). The plug (32) is removed from the fluid passage (24).
摘要:
The invention relates to an oil jet (10) for a turbine engine, comprising a body (16) including a circulation pipe (18) intended for the flow of a pressurised fluid. The body (16) of the jet (10) comprises a first portion (24) and a second portion (26) between which a resiliently deformable membrane (52) is inserted, said membrane being capable of deforming between a sealing position in which it prevents the circulation of the fluid in the pipe (18) and a position in which it allows the circulation of fluid in the pipe (18). The second portion (26) includes bearing means (46) configured to exert a force on the membrane (52) positioned in the opposite direction to the circulation of fluid so as to pre-load the membrane (46) in locking position.
摘要:
A gas turbine engine (20) includes a bearing compartment (62a,62b) with a bottom (68a,68b) disposed opposite a top (70a,70b). An outlet (72a,72b) is formed in the bottom (68a,68b) of the bearing compartment (62a,62b). A seal (76a,76b) is positioned between the bottom (68a,68b) of the bearing compartment (62a,62b) and the top (70a,70b) of the bearing compartment (62a,62b). A scavenge line (66a,66b) is connected to the outlet (72a,72b). The scavenge line (66a,66b) forms a fluid trap (88a,88b) that extends in a first direction from the outlet (72a,72b) and the bottom (68a,68b) of the bearing compartment (62a,62b) and then extends in a second direction to a position disposed vertically between the bottom (68a,68b) of the bearing compartment (62a,62b) and the seal (76a,76b).