B - Operations – Transporting – 23 – K
Patent
B - Operations, Transporting
23
K
327/6
B23K 15/00 (2006.01) B23K 15/04 (2006.01) F01D 9/04 (2006.01)
Patent
CA 1123921
WELDING METHOD FOR TURBINE DIAPHRAGMS ABSTRACT OF THE DISCLOSURE In the manufacture of a turbine diaphragm a spacer having a plurality of nozzle blades is joined to outer and inner wheels. The spacer and the outer or inner wheel are welded from both sides. At the inlet side of the diaphragm where the motive fluid flows into the diaphragm, the spacer and the outer and inner wheel are welded so that weld depth is at most 0.5 L, where L denotes the distance between the inlet side and the top of the nozzle blade. At the outlet side of the diaphragm, the spacer and the outer and inner wheels are weld so that weld depth is at least 0.3C, where C is the height of the nozzle blades.
336615
Otawara Yasuhiko
Sakata Shinji
Shimizu Tasuku
Yokota Hirakazu
Hitachi Ltd.
Kirby Eades Gale Baker
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