Hardfacing technique and improved construction for inlet steam s

Details Hardfacing technique and improved construction for inlet steam s Hardfacing technique and improved construction for inlet steam s

1987-08-14

1989-07-25

Garrett, Robert E.

Rotary kinetic fluid motors or pumps

Including thermal expansion joint

Radially sliding

415232, F04D 2912

Patent

active

048507946

ABSTRACT:
An improved steam turbine system is provided having a hardfacing disposed on a portion of its steam inlet chamber wear surfaces. The invention also includes a novel stacked ring design having a hardfaced inlet sleeve and stationary, nitride sealing rings for minimizing wear. Also included are novel heat treatments and metallurgical processes for stress relieving these hardfaced components. The techniques and designs employed, decrease steam leakage and assure longer service life for steam powered turbines.

REFERENCES:
patent: 1625541 (1927-04-01), Hodgkinson
patent: 2800299 (1957-07-01), Sheppard et al.
patent: 2863632 (1958-12-01), Miller
patent: 3476099 (1969-11-01), Packard et al.
patent: 4362464 (1982-12-01), Stock
patent: 4702671 (1987-10-01), Brinkman et al.
The Condensed Chemical Dictionary, 8th Edition, p. 826, 8/1971.
T. B. Jefferson, et al., Metals and How to Weld Them, James F. Lincoln Arc Welding Foundation, cp. 18, Cleveland, OH, Feb., 1983.

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