초록 ▼

A cooling arrangement for a bladed rotor in a gas turbine engine, wherein each of the blades includes cooling air passages and a cover with curved fins is mounted adjacent to but connected to the rotor and spaced apart slightly from the rotor disc to form a passageway for the cooling fluid. The cool

A cooling arrangement for a bladed rotor in a gas turbine engine, wherein each of the blades includes cooling air passages and a cover with curved fins is mounted adjacent to but connected to the rotor and spaced apart slightly from the rotor disc to form a passageway for the cooling fluid. The cooling arrangement includes a tapered, conically shaped inlet formed in the cooling passage which then diverges to form a diffuser near the outer end of the passageway. The cover includes an enlarged inner portion and a thin outer wall portion beyond the free ring diameter. A hammerhead is formed at the outer periphery of the cover whereby the hammerhead will move closer to the disc in response to centrifugal forces, thus sealing the passage.

대표청구항 ▼

[ We claim:] [1.] A rotor assembly for a gas turbine comprising: a rotor having an annular rim, a set of turbine blades mounted by their roots on the rim of the rotor, the blades having blade cooling passages and passage inlets at the respective roots, rotor cooling passages leading from the rim of

[ We claim:] [1.] A rotor assembly for a gas turbine comprising: a rotor having an annular rim, a set of turbine blades mounted by their roots on the rim of the rotor, the blades having blade cooling passages and passage inlets at the respective roots, rotor cooling passages leading from the rim of the rotor to the passage inlets at the roots of the blades, a rotor cover having a free ring diameter and a radially outermost portion mounted on the rotor adjacent its upstream side for rotation with the rotor, the cover spaced from the rotor to define a main cooling passage for directing cooling air outwardly radially to the passage inlets, the cover having an outer radial section, outboard of the free ring diameter, curved slightly upstream to have its center of gravity upstream from its point of attachment to the remainder of the cover, radially extending vanes on the downstream side of the rotor cover, the outermost portion having a lip that is turned downstream to lie adjacent the rotor whereby, when the cover rotates with the rotor, centrifugal force will tend to straighten the outer radial section of the cover causing the lip to abut tightly against the rotor to seal the main cooling passage and the vanes maximize the pumping action of the cooling air through the main cooling passage.