Rotary kinetic fluid motors or pumps – Working fluid passage or distributing means associated with... – Specific casing or vane material
Patent
1995-02-21
2000-09-26
Verdier, Christopher
Rotary kinetic fluid motors or pumps
Working fluid passage or distributing means associated with...
Specific casing or vane material
4151995, 4152161, 416241R, 148325, 148333, 420 38, 420107, 420109, F01D 514
Patent
active
061235040
ABSTRACT:
A steam turbine includes a rotor shaft, movable blades assembled on the rotor shaft, fixed blades for guiding inflow of steam to the moving blades, and an inner casing for holding the fixed blades. The rotor shaft and at least a first stage of the movable blades are made of high-strength martensitic steel comprising 0.05-0.20(%) of C, at most 0.15(%) of Si, 0.3-0.7(%) of Mn, 9.5-13(%) of Cr, 0.3-0.7(%) of Ni, 0.05-0.35(%) of V, 0.02-0.15(%) of Nb, 0.01-0.06(%) of N, 0.05-0.5(%) of Mo, 1.0-3.5(%) of W, 2-10(%) of Co and 0.0005-0.03(%) of B and at least 78(%) of Fe (the percentages being given in terms of weight). The inner casings is made of martensitic cast steel comprising 0.06-0.16(%) of C, at most 0.5(%) of Si, at most 1(%) of Mn, 0.2-1.0(%) of Ni, 8-12(%) of Cr, 0.05-0.35(%) of V, 0.01-0.15(%) of Nb, 0.01-0.1(%) of N, at most 1.5% of Mo, 1-4(%) of W and 0.0005-0.03(%) of B and at least 85(%) of Fe (the percentages being given in terms of weight). The rotor shaft has a length of at least 5 (m) and has a minimum diameter of at least 600 (mm) at a portion where the fixed blades are assembled. The first stage of said moving blades has a length of at least 35 (mm) at a blade portion thereof.
REFERENCES:
patent: 2955429 (1960-10-01), Miller
patent: 3880549 (1975-04-01), Schrieken
patent: 3928977 (1975-12-01), Braytenbah et al.
patent: 3990243 (1976-11-01), Davoud
patent: 4328675 (1982-05-01), Pocrnja et al.
patent: 4404041 (1983-09-01), Akahori et al.
patent: 4598551 (1986-07-01), Dimimtroff, Jr. et al.
patent: 4920751 (1990-05-01), Gounder et al.
patent: 5383768 (1995-01-01), Siga et al.
patent: 5489194 (1996-02-01), Yoshinari et al.
patent: 5536146 (1996-07-01), Siga et al.
patent: 5749228 (1998-05-01), Shiga et al.
Fujita Toshio
Fukui Yutaka
Hidaka Kishio
Hiraga Ryo
Kuriyama Mitsuo
Hitachi , Ltd.
Verdier Christopher
LandOfFree
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