Double seal arrangement
AssigneePratt & Whitney Canada Corp.
InventorsMihail Temelie, Gilles Fournier
Life of this patent
Estimating the term…
Abstract
A tube assembly comprises a tube having a tube flange securable to an associated mounting surface of a turbine engine component. A first seal is provided at the bore interface between the tube and a fluid port of the engine component. A second seal is provided at the flange interface between the tube flange and the tube mounting surface of the engine component. The second seal includes a gasket having a sheet metal body with corrugations projecting from the tube facing side of the gasket. Tabs are distributed along a periphery of the gasket for resiliently holding the gasket on the tube flange with the tube facing side of the gasket facing the tube flange.
Claims19
A tube assembly for a gas turbine engine, comprising:
- a tube having a tube end and a tube flange projecting from the tube end to a peripheral wall circumscribing the tube flange;
- an engine component having a tube mounting surface surrounding a fluid port fluidly connected to the tube, the tube end engaged in the fluid port and defining a bore interface therebetween, a flange interface defined between the tube mounting surface and the tube flange;
- a first seal at the bore interface between the tube and the fluid port of the engine component;
- a second seal at the flange interface between the tube flange and the tube mounting surface of the engine component, the second seal including a gasket, the gasket having:
- a sheet metal body having a tube facing side and an engine component facing side opposite to the tube facing side;
- corrugations projecting from the tube facing side;
- and
- tabs distributed along a periphery of the sheet metal body, the tabs spring loaded against the peripheral wall of the tube flange, the tabs resiliently holding the gasket on the tube flange with the tube facing side of the gasket facing the tube flange;
- and
- fasteners securing the tube flange to the tube mounting surface of the engine component, the fasteners holding the gasket in compression between the tube flange and the tube mounting surface;
- wherein the corrugations include a central annular corrugation concentric with a central hole defined in the sheet metal body of the gasket, and a first pair and a second pair of linear corrugations disposed outside of the central annular corrugation, the sheet metal body having a first bolt hole and a second bolt hole defined therethrough on diametrically opposed sides of the central hole, the first bolt hole disposed between the linear corrugations of the first pair of linear corrugations, the second bolt hole disposed between the linear corrugations of the second pair of linear corrugations.
A dual seal arrangement between a tube fitting and an accessory of a gas turbine engine, comprising:
- an O-ring at a bore interface between the tube fitting and a fluid port of the accessory;
- and
- a metal gasket at a flange interface between a flange of the tube fitting and the accessory, the metal gasket having:
- a tube fitting side and an accessory facing side;
- deformable corrugations projecting from the tube fitting side;
- spring-loaded tabs distributed about a perimeter of the metal gasket, the spring-loaded tabs projecting outwardly from the tube fitting side and disposed for resiliently grasping a peripheral wall of the flange of the tube fitting;
- and
- a first and a second bolt hole disposed on opposed sides of a central hole, the central hole concentric with the O-ring at the bore interface, the spring-loaded tabs disposed around the central hole in diametrically opposed pairs, the first and second bolt holes disposed between adjacent ones of the spring-loaded tabs;
- wherein the deformable corrugations include a first pair and a second pair of linear corrugations facing each other from the opposed sides of the central hole, the first bolt hole disposed between the linear corrugations of the first pair of linear corrugations, the second bolt hole disposed between the linear corrugations of the second pair of linear corrugations.
Dependencies are inferred from the claim text.