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US 10,502,230 B2Granted
Integrally bladed rotor having double fillet
AssigneeUnited Technologies Corporation
InventorCarney R. Anderson
Life of this patent
Estimating the term…
Abstract
An integrally bladed rotor according to an example of the present disclosure includes a hub, and a plurality of rotor airfoils integrally formed with the hub, and extending radially outward from an outer platform of the hub. Each rotor airfoil has a main body that extends radially outward from a root to a tip. A first fillet has a first radius that provides a transition from the outer platform of the hub, and a second fillet situated adjacent to and radially outward of the first fillet, that provides a transition between the first fillet and the main body. The second fillet has a second radius that is less than the first radius.
Claims18
An integrally bladed rotor comprising:
- a hub;
- and
- a plurality of rotor airfoils integrally formed with the hub, and extending radially outward from an outer platform of the hub, each rotor airfoil comprising:
- a main body extending radially outward from a root to a tip;
- a first fillet having a first radius and providing a transition from the outer platform of the hub;
- and
- a second fillet situated adjacent to and radially outward of the first fillet, and providing a transition between the first fillet and the main body, the second fillet having a second radius that is less than the first radius;
- wherein the first and second fillets meet at a rim, and wherein for at least one of the rotor airfoils, a height of the rim, defined as a radial distance from a beginning point of the first fillet, is 1%-20% of a maximum radial length of the airfoil between the beginning point and the tip.
5 more elements
An integrally bladed rotor comprising:
- a hub;
- and
- a plurality of rotor airfoils integrally formed with the hub, and extending radially outward from an outer platform of the hub, each rotor airfoil comprising:
- a main body extending radially outward from a root to a tip;
- a first fillet having a first radius and providing a transition from the outer platform of the hub;
- and
- a second fillet situated adjacent to and radially outward of the first fillet, and providing a transition between the first fillet and the main body, the second fillet having a second radius that is less than the first radius;
- wherein the first and second fillets meet at a rim, and wherein for at least one of the rotor airfoils, a ratio of a maximum width of the rim measured in a dimension perpendicular to a mean camber line of the rotor airfoil to a width of the main body measured along the same dimension between respective points where the second fillet ends on opposing outer sides of the airfoil is greater than 1:1 and less than or equal to 3:1.
5 more elements
An integrally bladed rotor comprising:
- a hub;
- and
- a plurality of rotor airfoils integrally formed with the hub, and extending radially outward from an outer platform of the hub, each rotor airfoil comprising:
- a main body extending radially outward from a root to a tip;
- a first fillet having a first radius and providing a transition from the outer platform of the hub;
- and
- a second fillet situated adjacent to and radially outward of the first fillet, and providing a transition between the first fillet and the main body;
- wherein the first and second fillets meet at a rim that provides a stepped platform between the first and second fillets, and a ratio of the first radius to the second radius is from 0.5:1 to 1.2:1.
5 more elements
A gas turbine engine comprising:
- a compressor comprising a plurality of stages;
- a fan operable to deliver air to the compressor;
- and
- a combustor operable to ignite a mixture of fuel and compressed air from the compressor;
- wherein at least one of the stages comprises an integrally bladed rotor having a hub and a plurality of rotor airfoils extending radially outward from the hub, each of the rotor airfoils including:
- a main body extending radially outward from a root to a tip;
- a first fillet having a first radius and providing a transition from the outer platform of the hub;
- and
- a second fillet situated adjacent to and radially outward of the first fillet, and providing a transition between the first fillet and the main body, the second fillet having a second radius that is less than the first radius;
- wherein the first and second fillets meet at a rim, and wherein the rim of at least one rotor airfoil of one of the stages has a different height defined as a radial distance from a beginning point of the first fillet, different maximum width measured along a dimension perpendicular to an airfoil mean camber line, or both than the rim of at least one rotor airfoil of another of the stages.
7 more elements
Dependencies are inferred from the claim text.