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US 4,307,993 AGranted
Air-cooled cylinder with piston ring labyrinth
AssigneeAvco Corporation
InventorEdward O. Hartel
Life of this patent
Estimating the term…
Abstract
A turbine cylinder is in contact at its outer surface with split rings which are held in place in annular slots in a cylindrically extending ring holder. The rings, while remaining in contact with the outer surface of the cylinder, are allowed to expand and contract within their respective slots. Notches are constructed at the inner circumference of the rings to form a labyrinth type cooling passage in conjunction with the outer surface of the turbine cylinder.
Claims6
In a gas turbine engine a turbine blade shroud assembly comprising:
- an inner shroud member mounted on the engine structure and extending into the turbine blade clearance area to surround the turbine blades;
- an outer shroud member fixed to the engine structure and surrounding the inner shroud member at a radial distance therefrom;
- said outer shroud member having a plurality of radially extending slots constructed at axially spaced intervals in its inner surface;
- and
- a plurality of split rings mounted for sliding radial motion in the annular slots;
- said rings extending radially inward to engage the inner shroud member;
- thereby forming annular passages between the axially spaced ring and the inner shroud member, said rings having circumferentially spaced notches on their inner surface to communicate between the annular passages.
4 more elements
Dependencies are inferred from the claim text.