Low pressure end blade for a low pressure steam turbine

Details Low pressure end blade for a low pressure steam turbine Low pressure end blade for a low pressure steam turbine

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.

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