Multi-function boss for a turbine exhaust case
AssigneeUnited Technologies Corporation
InventorJonathan Ariel Scott
Life of this patent
Estimating the term…
Abstract
A turbine exhaust case frame (100) comprises an inner ring (104), an outer ring (102), and a plurality of load-bearing struts (106). The inner ring is configured to carry load from inner bearings. The outer ring features a multi-function boss (116) with a service line aperture (124) and a mounting point for the turbine exhaust case. The load-bearing struts connect the inner ring to the outer ring, and have a service line passage (128) extending from the service line aperture to the inner ring.
Claims16
An exhaust case frame for a turbine, the exhaust case frame comprising:
- an inner ring configured to carry load from inner bearings;
- an outer frustoconical ring angled away from a rotational axis of the turbine in an axially aftward direction, the outer ring having a multi-function boss, the multifunction boss comprising:
- a service line aperture in a first, radially-outboard plane;
- and
- a heavy body with a mounting point in a second plane axially forward and radially inward of the first plane;
- wherein the first plane is parallel to the second plane;
- and
- wherein the first plane and second plane are parallel to the rotational axis such that the outer ring is angled with respect to the first plane and the second plane;
- a plurality of load-bearing struts connecting the inner ring to the outer ring, and having a service line passage extending from the service line aperture to the inner ring;
- and
- a seal plate disposed atop the service line aperture such that the seal plate defines a third plane radially outward from the first plane, the seal plate comprising at least one service line hole extending therethrough, the at least one service line hole having a smaller area than the service line aperture.
A method of installing a service line in an exhaust case for a turbine, the method comprising:
- attaching a first end of the service line to a seal plate through a service line hole;
- inserting a second end of the service line opposite the second end through a service line passage extending through a strut of a turbine exhaust case frame;
- and
- securing the seal plate to a multi-function boss on an outer ring of the frame, the outer ring being a frustoconical structure angled away from a rotational axis of the turbine in an axially aftward direction, wherein the multi-function boss comprises:
- a service line aperture in a first, radially-outboard plane, the service line aperture opening into the service line passage;
- and
- a heavy body with a mounting point for the turbine exhaust case in a second plane axially forward and radially inward of the first plane;
- wherein the first plane is parallel to the second plane;
- wherein the first plane and second plane are parallel to the rotational axis such that the outer ring is angled with respect to the first plane and the second plane;
- and
- wherein the seal plate is disposed atop the service line aperture such that the seal plate defines a third plane radially outward from the first plane;
- and
- wherein the service line hole has a smaller area than the service line aperture.
Dependencies are inferred from the claim text.