Fluid reaction surfaces (i.e. – impellers) – Specific blade structure – Coating – specific composition or characteristic
Patent
1989-06-20
1991-07-09
Look, Edward K.
Fluid reaction surfaces (i.e., impellers)
Specific blade structure
Coating, specific composition or characteristic
415200, 4152171, B63H 100, F03B 700
Patent
active
050300644
ABSTRACT:
A water turbine used in river water which is comparatively rich in soil and sand particles. In order to improve the resistance to erosion due to cavitation, as well as erosion caused by mechanical action of the soil and sand particles, a water contactable portion of the water turbine, in particular a portion of each moving blade which tends to be eroded is formed of a stainless steel containing 0.07 to 0.2 wt % of C, not more than 2 wt % of Si, 7 to 15 wt % of Mn, 1 to 7 wt % of Ni, 10 to 25 wt % of Cr, 0.1 to 3 wt % of W, and the balance substantially Fe and inevitably accompanying impurities.
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Satoo Kooji
Takata Michihiro
Takayasu Hiroshi
Usami Kenichi
Hitachi , Ltd.
Look Edward K.
Nguyen Hoang
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