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US 10,760,500 B2Granted
Composite piston ring seal for axially and circumferentially translating ducts
AssigneeRaytheon Technologies Corporation
InventorsSteven D. Porter, Donald W. Peters, James P. Bangerter
Life of this patent
Estimating the term…
Abstract
A seal system is provided. The seal system may comprise a first duct having an annular geometry, a second duct overlapping the first duct in a radial direction, and a seal disposed between the first duct and the second duct. The seal may comprise a groove defined by the first duct and a piston configured to slideably engage the groove.
Claims19
A seal system for a gas turbine engine, comprising:
- a first duct having an annular geometry and including a first surface exposed to a bypass airflow, wherein the first surface is oriented radially inward;
- a second duct coaxial to the first duct and disposed radially outward of the first duct, the second duct including a second surface oriented radially inward and exposed to the bypass airflow, wherein a forward portion of the second surface overlaps an aft portion of the first duct in a radial direction;
- a seal disposed between the aft portion of the first duct and the forward portion of the second surface, the seal comprising:
- a groove defined by the second duct;
- a piston configured to slideably engage the groove;
- and
- a spring disposed in the groove, the spring being located between the piston and a floor of the groove.
4 more elements
A gas turbine engine, comprising:
- a compressor;
- a combustor disposed aft of the compressor and in fluid communication with the compressor;
- a turbine aft of the combustor and in fluid communication with the combustor;
- an inner duct radially outward from the turbine, the inner duct including a first surface exposed to a bypass airflow;
- an outer duct radially outward from the inner duct, the outer duct including a second surface exposed to the bypass airflow, wherein a forward portion of the outer duct overlaps an aft portion of the inner duct;
- a groove formed aft of the turbine and in the forward portion of the outer duct;
- and
- a piston configured to slideably engage the groove.
5 more elements
Dependencies are inferred from the claim text.