A cooling apparatus bifurcates and regulates cooling airflow provided to a mid-turbine frame. The cooling apparatus includes a flow metering tube and a metering plate. The flow metering tube includes a top portion and a tube portion, wherein the top portion includes a first central aperture that dir
A cooling apparatus bifurcates and regulates cooling airflow provided to a mid-turbine frame. The cooling apparatus includes a flow metering tube and a metering plate. The flow metering tube includes a top portion and a tube portion, wherein the top portion includes a first central aperture that directs a first cooling airflow into the tube portion and a first plurality of apertures located circumferentially around the central aperture that directs a second cooling airflow to a portion outside the tube portion. The metering plate is located on the top portion of the flow metering tube, wherein the metering plate includes a second central aperture aligned with the central aperture of the flow metering tube and a second plurality of apertures located circumferentially around the central aperture, wherein a size of the second central aperture meters the first cooling airflow and a size and number of the second plurality of apertures meters the second cooling airflow.
대표청구항▼
1. A cooling apparatus that bifurcates and regulates cooling airflow provided to a mid-turbine frame, the cooling apparatus comprising: a flow metering tube having a top portion and a tube portion, wherein the top portion includes a first central aperture that directs a first cooling airflow into th
1. A cooling apparatus that bifurcates and regulates cooling airflow provided to a mid-turbine frame, the cooling apparatus comprising: a flow metering tube having a top portion and a tube portion, wherein the top portion includes a first central aperture that directs a first cooling airflow into the tube portion and a first plurality of apertures located circumferentially around the first central aperture that directs a second cooling airflow to a portion outside the tube portion; anda metering plate located on the top portion of the flow metering tube, wherein the metering plate includes a second central aperture aligned with the first central aperture of the flow metering tube and a second plurality of apertures located circumferentially around the second central aperture, wherein a size of the second central aperture meters the first cooling airflow and a size and number of the second plurality of apertures meters the second cooling airflow;wherein the tube portion of the flow metering tube provides the first cooling airflow to a hollow cooling rod that communicates the first cooling airflow to an inner portion of the mid-turbine frame. 2. The cooling apparatus of claim 1, wherein the top portion of the flow metering tube includes a plurality of gaps on an outer diameter, and the metering plate includes a plurality of tabs on an outer diameter, wherein the metering plate is prevented from rotating by engaging the plurality of tabs within the plurality of gaps. 3. The cooling apparatus of claim 1, wherein the size of the second central aperture determines flow of the first cooling airflow provided to the tube portion. 4. The cooling apparatus of claim 1, wherein the size of the second plurality of apertures determines flow of the second cooling airflow provided to the portion outside the tube portion. 5. A cooling apparatus that bifurcates and regulates cooling airflow provided to a mid-turbine frame, the cooling apparatus comprising: a flow metering tube having a top portion and a tube portion, wherein the top portion includes a first central aperture that directs a first cooling airflow into the tube portion and a first plurality of apertures located circumferentially around the first central aperture that directs a second cooling airflow to a portion outside the tube portion; anda metering plate located on the top portion of the flow metering tube, wherein the metering plate includes a second central aperture aligned with the first central aperture of the flow metering tube and a second plurality of apertures located circumferentially around the second central aperture, wherein a size of the second central aperture meters the first cooling airflow and a size and number of the second plurality of apertures meters the second cooling airflow;wherein the top portion of the flow metering tube includes a plurality of gaps on an outer diameter, and the metering plate includes a plurality of tabs on an outer diameter, wherein the metering plate is prevented from rotating by engaging the plurality of tabs within the plurality of gaps. 6. The cooling apparatus of claim 5, wherein the size of the second central aperture determines flow of the first cooling airflow provided to the tube portion. 7. The cooling apparatus of claim 5, wherein the size of the second plurality of apertures determines flow of the second cooling airflow provided to the portion outside the tube portion. 8. A cooling system for a mid-turbine frame, the cooling system comprising: an outer case;an inner hub;a hollow cooling rod that extends from the inner hub to the outer case;a fastener that mechanically attaches the hollow cooling rod to the outer case and has a hollow portion and side apertures located on a side portion of the fastener for delivering cooling airflow to a portion adjacent the outer case;a flow metering tube positioned within the hollow portion of the fastener, the flow metering tube having a top portion and a tube portion that is coupled with the hollow cooling rod, wherein the top portion includes a first central aperture that directs a first cooling airflow into the tube portion for supply to the hollow cooling rod and an inner diameter location, and a first plurality of apertures located circumferentially around the first central aperture that directs a second cooling airflow to the hollow portion of the fastener for supply via the side apertures to the portion adjacent the outer case; anda metering plate located on the top portion of the flow metering tube, wherein the metering plate includes a second central aperture aligned with the first central aperture of the flow metering tube and a second plurality of apertures located circumferentially around the second central aperture, wherein a size of the second central aperture meters the first cooling airflow and a size and number of the second plurality of apertures meters the second cooling airflow. 9. The cooling system of claim 8, wherein the top portion of the flow metering tube includes a plurality of gaps on an outer diameter, and the metering plate includes a plurality of tabs on an outer diameter, wherein the metering plate is prevented from rotating by engaging the plurality of tabs within the plurality of gaps. 10. The cooling system of claim 8, wherein the size of the second central aperture determines flow of the first cooling airflow provided to the tube portion. 11. The cooling system of claim 8, wherein the size of the second plurality of apertures determines flow of the second cooling airflow provided to the portion adjacent the outer case. 12. The cooling system of claim 8, wherein the fastener is a nut. 13. The cooling system of claim 12, further including: an external manifold attached to the nut that holds the metering plate in place on top of the flow metering tube; anda cooling pipe that supplies cooling airflow to the external manifold for bifurcation and metering by the flow metering tube and the metering plate.
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