Rotary kinetic fluid motors or pumps – Axially opposed working fluid paths to or from runner – Plural – separate – parallel – simultaneous flow paths
Patent
1978-02-21
1981-01-20
Garrett, Robert E.
Rotary kinetic fluid motors or pumps
Axially opposed working fluid paths to or from runner
Plural, separate, parallel, simultaneous flow paths
416199, 403356, F01C 302
Patent
active
042459508
ABSTRACT:
Steam introduced into a turbine casing from a steam inlet is longitudinally divided and each divided steam portion flows in respective first stages which are disposed on the shaft adjacent to each other. The shaft and a plurality of disks which are manufactured independently are made integral by a thermal shrink. In order to reduce the thermal distortion effects on the shaft caused by keys interconnecting the disks and shaft, first key grooves formed on an outer surface of the shaft and an inner surface of the disks of one first stage and a first key closely disposed in the first key grooves are arranged in symmetry with respect to the center of the shaft, to second key grooves formed on an inner surface of the disk of the other first stage with a second key closely disposed in the second grooves. Other preferred embodiments include dummy grooves and keys to balance the thermal distortion effects of the keys interconnecting the disks and shaft.
REFERENCES:
patent: 3822953 (1974-07-01), Adelizzi
Fujisawa Fumio
Hisano Katsukuni
Kusumoto Sho
Ohno Masaharu
Sato Kazuo
Garrett Robert E.
Hitachi , Ltd.
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