Light weight and highly cooled turbine blade
First Claim
1. A turbine rotor blade comprising:
- a main support spar forming a support structure for the blade;
the blade having an airfoil extending from a platform and an attachment section;
the main support spar formed from a plurality of ribs that define a cooling air supply cavity in a leading edge region of the airfoil, a plurality of impingement chambers spaced along the pressure side and the suction side of the airfoil, and a plurality of spent cooling air chambers spaced along the pressure side and the suction side of the airfoil; and
,the plurality of impingement chambers and spent cooling air chambers are arranged together in series such that cooling air flowing into an impingement chamber then flows into a collector chamber and then into another impingement chamber.
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Accused Products
Abstract
A turbine rotor blade formed from a main support spar and having a thin thermal skin bonded or formed to the support spar to form the outer airfoil surface of the blade. The main support spar is formed from a plurality of ribs arranged to form a cooling air supply cavity near the leading edge region, a plurality of impingement chambers and a plurality of spent air collector chambers arranged along the pressure side and suction side of the airfoil to form a series of impingement chambers and collector chambers to provide near wall cooling for the thermal skin. A row of exit cooling holes located along the trailing edge discharges the cooling air from the last collector chamber. In another embodiment, some of the collector chambers are connected to rows of film cooling air to discharge film cooling onto the outer airfoil surface. The thermal skin includes micro pin fins on the inner wall to enhance the cooling effect of the impinging cooling air. The entire blade comprises a spar support structure, a thin thermal skin, external coating formed using a metal molecular depositing process to build up the blade as a single piece but with multiple material.
71 Citations
22 Claims
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1. A turbine rotor blade comprising:
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a main support spar forming a support structure for the blade; the blade having an airfoil extending from a platform and an attachment section; the main support spar formed from a plurality of ribs that define a cooling air supply cavity in a leading edge region of the airfoil, a plurality of impingement chambers spaced along the pressure side and the suction side of the airfoil, and a plurality of spent cooling air chambers spaced along the pressure side and the suction side of the airfoil; and
,the plurality of impingement chambers and spent cooling air chambers are arranged together in series such that cooling air flowing into an impingement chamber then flows into a collector chamber and then into another impingement chamber. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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Specification