Moisture removal grooves on steam turbine buckets and covers...

Details Moisture removal grooves on steam turbine buckets and covers... Moisture removal grooves on steam turbine buckets and covers...

2008-01-15

2008-01-15

Kershteyn, Igor (Department: 3745)

Rotary kinetic fluid motors or pumps

Including means for handling portion separated from working...

Moisture or liquid separated from gaseous working fluid...

C415S169100, C416S092000, C416S23600R

Reexamination Certificate

active

11139661

ABSTRACT:
Covers on bucket tips are provided with an access slot along a circumferentially facing edge of the cover at a location where moisture removal grooves of the bucket will intersect with the cover. Machine tooling is then applied to form the grooves along the suction side and adjacent the leading of the bucket. The machining runs out through the access slot forming grooves along the side edge of the bucket cover within the slot. The axial extent of the covers overlying leading and trailing edges of the buckets is maintained while enabling moisture removal by centrifugal action.

REFERENCES:
patent: 1829674 (1931-10-01), Rosenlocher
patent: 3290004 (1966-12-01), Ishibashi
patent: 3304056 (1967-02-01), Sohma
patent: 3973870 (1976-08-01), Desai
patent: 5261785 (1993-11-01), Williams
patent: 6213711 (2001-04-01), Muller et al.
patent: 6375417 (2002-04-01), Hofer et al.
patent: 6474942 (2002-11-01), Markytan

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