F - Mech Eng,Light,Heat,Weapons – 01 – D
Patent
F - Mech Eng,Light,Heat,Weapons
01
D
F01D 5/00 (2006.01) F01D 5/30 (2006.01)
Patent
CA 2092273
A blade root including, in downward order and symmetrical on each side of a center line: an upper neck of width w2; an upper lug having an upper flat bearing surface from a beginning point to a terminating point, and a fillet surface of radius R2, an arcuate length defined by a terminating point coexistent with the beginning point of the upper root bearing surface, the upper root bearing surface contacting an upper flat groove bearing surface extending from a beginning point to a terminating point, the groove including a fillet surface of radius R3, an arcuate length defined by a beginning point of the upper groove bearing surface, the upper root bearing surface and the upper groove bearing surface contacting over a length l1 from the beginning point of the upper groove bearing surface to the terminating point of the upper root bearing surface; a lower neck of width w2; and a lower lug having a lower flat root bearing surface from a beginning point to a terminating point, and a fillet surface of radius R6, an arcuate length defined by a terminating point coexistent with the beginning point of the lower root bearing surface, the lower root bearing surface contacting a lower flat groove bearing surface extending from a beginning point to a terminating point, the groove including a fillet surface of radius R7, an arcuate length defined by a beginning point coexistent with the terminating paint of the lower groove bearing surface, the lower root bearing surface and the lower groove bearing surface contacting over a length l2 from the beginning point to the lower groove bearing surface to the terminating point of the lower root bearing surface, with the following ratios, w2 to w1 about .69, R2 to w1 about .15, R3 to w1 about .15, R6 to w1 about .08, R7 to w1 about .12, l1 to w1 about .13, and l2 to w1 about .10.
Bereskin & Parr Llp/s.e.n.c.r.l.,s.r.l.
Siemens Energy Inc.
Westinghouse Electric Corporation
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