TURBOPROP ENGINE WITH COMPRESSOR TURBINE SHROUD
First Claim
1. A turboprop engine comprising:
- an annular outer case including a mount ring for attachment to an aircraft along a plane to transfer loads from a propeller, the mount ring having an annular flange extending radially inwardly therefrom within the plane;
an annular turbine support case received within the outer case and connected to the outer case only through a direct connection with the annular flange allowing a limited relative pivoting motion between the turbine support case and the mount ring; and
a turbine section including a rotor closely surrounded by a shroud with an annular tip clearance being defined therebetween, the shroud being directly connected to and located by the turbine support case..
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Accused Products
Abstract
A turboprop engine including an annular outer case including a mount ring for attachment to an aircraft along a plane to transfer loads from a propeller and having an annular flange extending radially inwardly therefrom within the plane, an annular turbine support case received within the outer case and connected to the outer case only through a direct connection with the annular flange allowing a limited relative pivoting motion between the turbine support case and the mount ring, and a turbine section including a rotor closely surrounded by a shroud with an annular tip clearance being defined therebetween, the shroud being directly connected to and located by the turbine support case. A method of isolating a turbine shroud from propeller loads in a propeller engine is also disclosed.
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Citations
20 Claims
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1. A turboprop engine comprising:
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an annular outer case including a mount ring for attachment to an aircraft along a plane to transfer loads from a propeller, the mount ring having an annular flange extending radially inwardly therefrom within the plane; an annular turbine support case received within the outer case and connected to the outer case only through a direct connection with the annular flange allowing a limited relative pivoting motion between the turbine support case and the mount ring; and a turbine section including a rotor closely surrounded by a shroud with an annular tip clearance being defined therebetween, the shroud being directly connected to and located by the turbine support case.. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A turboprop engine comprising:
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an annular outer case including a mount ring for attachment to an aircraft along a plane, the mount ring having an annular flange extending radially inwardly therefrom within the plane, the annular outer case including a portion extending from the mount ring to a support of a shaft of the engine and defining a load path for loads from a propeller; an annular turbine support case received within the outer case and connected to the outer case only through a direct connection with the annular flange, the support case extending free of the load path; a turbine section received within the outer case and including a rotor in driving engagement with the shaft and closely surrounded by a shroud with an annular tip clearance being defined therebetween, the shroud being directly connected to and located by the turbine support case. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16)
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17. A method of isolating a turbine shroud from propeller loads in a propeller engine having an outer case with a mount for attachment of the engine to an aircraft along a plane to transfer the propeller loads, the method comprising:
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supporting a shaft of the engine with a portion of the outer case extending from the mount and defining a load path for the propeller loads through the portion of the outer case; attaching a turbine support case to extend free of the load path including attaching the turbine support case to the outer case only through a connection along the plane allowing a limited relative pivoting motion between the turbine support case and the mount; and locating the turbine shroud by directly connecting the shroud to the turbine support case. - View Dependent Claims (18, 19, 20)
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Specification