摘要:
Un assemblage amélioré d'engrenages planétaires composés comprend des couronnes multiples (26, 30, 32) de trains planétaires entraînées par une série d'engrenages planétaires (12) et couplées à des charges multiples (A, B). Deux parmi les couronnes (30, 32) de trains planétaires sont couplées à une charge commune (B) par des voies de réaction mécaniques de longueurs sensiblement différentes, ce qui permet de loger tout l'assemblage dans une enveloppe de dimensions hors tout réduites. La voie de réaction mécanique la plus courte comprend un élément flexible d'engrenage (46) qui réduit la rigidité ou taux d'élasticité de la voie la plus courte de façon à la faire correspondre essentiellement à la rigidité ou taux d'élasticité de la voie la plus longue, assurant ainsi un chargement symétrique des engrenages planétaires et leur fonctionnement sans à-coups.
摘要:
An alignment tool (74) for use in inspecting a ring gear (60) of a gearbox (20). The ring gear includes an outer surface (82) and a plurality of gear teeth (62) extending radially inwardly from the outer surface. The alignment tool includes a support member (106) that extends between a leading edge (114) and a trailing edge (116). The support member is removably mountable to the ring gear outer surface such that the leading edge is oriented substantially parallel to a forward surface (86) of the ring gear. A guide member (108) extends outwardly from the support member. The guide member includes a guide edge (118) that is oriented with respect to a centerline (94) of a gear tooth (62).
摘要:
A steering device (1) includes a steering shaft (2), a rotation member (60) to which rotation of the steering shaft (2) is transmitted, an elastic member (70) that is elastically deformed when the rotation member (60) rotates, and a reduction device (6) located between the steering shaft (2) and the rotation member (60). The reduction device (6) reduces rotation of the steering shaft (2) in speed and transmits the rotation to the rotation member (60).
摘要:
A fan drive gear system for a gas turbine engine includes a torque frame (44) and a journal bearing (50). The torque frame has an arm (60) that extends therefrom, the journal bearing is mounted on the arm. When the fan drive gear system is in an unloaded condition an outer circumferential surface of the journal bearing is disposed at an angle so that it is non-parallel with respect to an axis (R) of the arm. When the fan drive gear system is in a loaded condition the outer circumferential surface is disposed substantially parallel to the axis of the arm. In another aspect, the journal bearing includes a main body, a first wing, and a second wing. The first and second wings extend from the main body and are asymmetric with respect to one another.
摘要:
An epicyclic gear assembly according to an exemplary embodiment includes, among other things, a carrier including a first plate axially spaced from a second plate by a radially outer connector. A first set of epicyclic gears supported adjacent the first plate include a first set of circumferentially offset intermediate gears meshing with a first sun gear and a first ring gear. A second set of epicyclic gears are axially spaced from the first set of epicyclic gears and supported adjacent the second plate, and include a second set of circumferentially offset intermediate gears meshing with a second sun gear and a second ring gear. The first epicyclic gear set and the second epicyclic gear set maintain relative intermeshing alignment during flexure induced deformation of the carrier.