Runner, water wheel and method of manufacturing the same

Details Runner, water wheel and method of manufacturing the same Runner, water wheel and method of manufacturing the same

1997-03-12

1999-08-17

Ryznic, John E.

Rotary kinetic fluid motors or pumps

Working fluid passage or distributing means associated with...

Specific casing or vane material

416241R, F03B 312

Patent

active

059384034

ABSTRACT:
A water machinery runner, which is highly reliable and is so excellent in wear and corrosion resistances that it can be used even under conditions where sediment is contained in a fluid includes crown 21, band 22 and blade 23 of a water machinery runner 2 to be rotated by a working fluid or a fluid flowing in a passage. The elements of the machinery runner are coated on at least portions of their individual surfaces with a first surface film containing a metal, as selected from the group consisting of Ni, Cr and Co, and a chromium carbide, and a second surface film containing a metal, as selected from the group consisting of Ni, Cr and Co, and a tungsten carbide.

REFERENCES:
patent: 3758233 (1973-09-01), Cross et al.
patent: 4241110 (1980-12-01), Ueda et al.
patent: 5458460 (1995-10-01), Okada et al.

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