Fluid reaction surfaces (i.e. – impellers) – Specific blade structure – Radial flow devices
Patent
1989-04-27
1990-02-13
Powell, Jr., Everette A.
Fluid reaction surfaces (i.e., impellers)
Specific blade structure
Radial flow devices
416DIG2, 415181, F01D 514
Patent
active
049002309
ABSTRACT:
Replacement low pressure end blading for a utility power steam turbine having an extended length compared to original equipment end blading providing higher efficiency. The blading incorporates extended flat areas on the blade trailing edge for improved flow characteristics and reduced losses. Mass distribution is used to tune the blade to avoid natural harmonic frequencies coincidental with turbine rotational frequencies or harmonics thereof. Blade root modifications are included to facilitate installation.
REFERENCES:
patent: 2258793 (1941-10-01), New
patent: 2934259 (1960-04-01), Hausmann
patent: 3475108 (1969-10-01), Zickuhr
patent: 3529631 (1970-09-01), Riollet
patent: 3565548 (1971-02-01), Fowler et al.
patent: 4080102 (1978-03-01), Schwab
patent: 4626174 (1986-12-01), Sato et al.
Bach K.
Powell Jr. Everette A.
Westinghouse Electric Corp.
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