Patent ID: 11879383
Assignee: ROLLS-ROYCE DEUTSCHLAND LTD & CO KG
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F  B  H  Y | IPC B  F  H

Claim 17:
18. A torque limiting device in a gas turbine engine, the gas turbine engine comprising:
an epicyclic gearbox including a ring gear;
a stationary structure of the gas turbine engine;
a torque bearing connecting structure connecting the ring gear to the stationary structure and forming a load bearing path between the ring gear and the stationary structure;
the torque bearing connecting structure comprising the torque limiting device which further includes a mechanical fuse with an at least partially circumferential weakening of a wall of a circumferential plate, the at least partially circumferential weakening of the wall comprising a smooth profile in cross-section free of interruptions or holes formed along a radial length direction of the at least partially circumferential weakening of the wall;
wherein the smooth profile is bounded and includes in a sequential order and on at least one side of the at least partially circumferential weakening of the wall in the radial length direction of the at least partially circumferential weakening of the wall:
a concave section,
a convex section, and
a largest width section having a constant width,
wherein the concave section has a smaller width than the convex section and the convex section has a smaller width than the largest width section having the constant width, the concave section being located adjacent to the mechanical fuse.