Fluid reaction surfaces (i.e. – impellers) – Having positive means for impeller adjustment – Power derived from impeller shaft
Patent
1987-06-19
1988-09-20
Powell, Jr., Everette A.
Fluid reaction surfaces (i.e., impellers)
Having positive means for impeller adjustment
Power derived from impeller shaft
416160, F01D 702, F03D 704
Patent
active
047721820
ABSTRACT:
An adjusting device for adjustable rotor vanes of a machine rotor including a first gear wheel (34) on a machine shaft (2) and a second gear wheel (44) on an adjusting shaft (4), whereby a relative rotation between the machine shaft and the adjusting shaft can be initiated through a transmission (38) by either of two braking devices (12, 22). The adjusting device of the invention makes it possible to adjust the rotor vanes with a simple construction and with a good degree of efficiency while simultaneously providing good accessibility for assembly and service. A further brake (40, 41) is provided between the transmission (38) and the machine shaft (2) or the adjusting shaft (4) to maintain synchronous rotation of the adjusting shaft (4) with the machine shaft (2) during normal operation, i.e., so long as no adjustment of the rotor vanes (64) is to take place. This further brake (40, 41) is constructed in such a way that when the first braking device (12) or the second braking device (22) is actuated, the braking moment of the further brake (40, 41) is overcome.
REFERENCES:
patent: 1964102 (1934-06-01), Wishon
patent: 2108660 (1938-02-01), Farrell
patent: 2423400 (1947-07-01), Nichols
patent: 2738045 (1956-03-01), Mergen et al.
patent: 3794441 (1974-02-01), Johnson
patent: 4047842 (1977-09-01), Avena et al.
patent: 4527072 (1985-07-01), Degeer
patent: 4578019 (1986-03-01), Safarik
Balcke-Durr AG
Powell Jr. Everette A.
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