Patent application number | Description | Published |
20080317594 | INSTALLING A SHAFT IN A BEARING COMPRISING A SELF-RELEASING NUT - The present invention relates to a gas turbine engine comprising a shaft, a bearing, a coupling supported by the bearing, the shaft being engaged by an end trunnion inside the coupling and fixed to the coupling by means of a cylindrical nut. The engine is characterized in that the nut is in axial abutment in a first direction against the coupling and the trunnion is screwed onto the nut, a slotted stop ring housed in an annular groove of the nut forms an axial abutment in the direction opposing the first direction, so as to allow the removal of the trunnion from the coupling by unscrewing the nut. | 12-25-2008 |
20090000273 | TWIN FAN TURBOMACHINE - A twin fan turbomachine with two contrarotating fans, one upstream and one downstream, driven by two contrarotating coaxial shafts each of which connects one fan impeller to at least one low-pressure turbine impeller located downstream, the downstream fan impeller being connected by its downstream part to its drive shaft. | 01-01-2009 |
20090155052 | MOUNTING TUBES FOR PRESSURIZING AN INTERNAL ENCLOSURE IN A TURBOMACHINE - A turbomachine comprising high- and low-pressure compressor shafts guided in bearings isolated from an internal enclosure by a sealing end plate, and radial pressurization tubes connecting the enclosure to an air passage passing through the intermediate casing, the ends of these tubes being engaged in sealed manner in radial ducts of the intermediate casing and in radial chimneys of the sealing end plate, the chimneys being of a length is sufficient to enable the ends of the tubes to be moved in translation therein between a service position and a mounting position for the tubes. | 06-18-2009 |
20090155073 | SEALING THE FASTENING OF A BEARING SUPPORT IN A TURBOMACHINE - A turbomachine including a shaft guided in an upstream bearing and a downstream bearing, the upstream bearing being carried by a first annular support that is fastened by bolts to a casing via a second annular support that carries the downstream bearing, wherein the ends of the fastener bolts are covered by an annular cover sealingly fastened to the second support or to the casing. | 06-18-2009 |
20090297083 | DEVICE FOR THE AXIAL LOCKING OF A GUIDE SHAFT BEARING IN A TURBOMACHINE - Guide shaft bearing comprising an internal ring mounted on a cylindrical contact surface of a shaft and means for the axial locking of the ring comprising a ring mounted sliding on the cylindrical contact surface and an annular rib made of shape memory material mounted in two annular grooves of the cylindrical contact surface and of the ring, the annular rib being able to expand radially by shape memory effect when it is subjected to a temperature greater than a transition temperature of its material to pass to a locking position of the ring on the cylindrical contact surface. | 12-03-2009 |
20110150657 | TURBOMACHINE FAN ROTOR - A turbomachine fan rotor including a disk carrying blades with roots that are engaged in axial grooves of the disk, a spacer being interposed between the bottom of each groove and the corresponding blade root, the spacer including at its upstream end a nib for retaining the blade root, the nib including a downstream abutment face against which the upstream end of the blade root bears in event of a violent force being applied thereto, the abutment face being oblique relative to the axis of rotation of the rotor. | 06-23-2011 |
20130236291 | DEVICE FOR UNCOUPLING A BEARING CARRIER - A device for uncoupling a bearing carrier in a turbomachine, the bearing carrier including an upstream part and a downstream part including a plurality of upstream orifices respectively facing a plurality of downstream orifices. The uncoupling device includes rupture screws each passing through an upstream orifice and a downstream orifice, and at least a mechanism for double centering of a rupture screw with respect to the upstream orifice and to the downstream orifice respectively. The mechanism for double centering is independent of the upstream and downstream parts of the bearing carrier and of the rupture screw, and is configured to collaborate with the upstream part of the rupture screw such that when the rupture screw breaks, the upstream part carries with it the mechanism for double centering. A turbomachine can include such an uncoupling device. | 09-12-2013 |
20130319140 | DRIVESHAFT FOR THE GEARBOX OF AUXILIARY MACHINES OF A TURBOJET ENGINE - A turbojet engine including an intermediate casing including radial arms and a driveshaft for a gearbox for auxiliary machines of the turbojet engine, the driveshaft mounted in a radial arm, the radial arm including an intermediate bearing supporting the driveshaft, the intermediate bearing including plural rolling bearings supporting the driveshaft, the driveshaft including a first shaft element connected at one end to a mechanism providing mechanical transmission to an engine shaft of the turbojet engine, and a second shaft element connected at one end to a mechanism providing mechanical transmission to the box. The first shaft element and the second shaft element are linked by a connection including plural splines. A single plane transversely passes through the plural splines and the plural rolling bearings. | 12-05-2013 |
20140119893 | DUAL-FLOW TURBINE ENGINE HAVING A DECOUPLING DEVICE - A dual-flow turbine engine including: a fan rotatably mounted on a fan shaft and a stationary structural element, the fan shaft and the structural element being connected to one another at an upstream bearing and at a downstream bearing via an upstream bearing bracket and a downstream bearing bracket, respectively; and a decoupling device surrounding the fan shaft, and including a set of attachment screws joining the downstream bearing bracket to the structural element and a set of fusible screws joining the upstream bearing bracket to the downstream bearing bracket. At least some of the fusible screws are arranged between at least some of the attachment screws over a single circumference surrounding the fan shaft. | 05-01-2014 |