Rotary kinetic fluid motors or pumps – Including thermal expansion joint – Circumferentially spaced nozzle or stator segments
Patent
1984-09-26
1986-12-30
Goldberg, Howard N.
Rotary kinetic fluid motors or pumps
Including thermal expansion joint
Circumferentially spaced nozzle or stator segments
29 235, 291568R, 29526R, 415189, 415190, 403336, 403338, 24331, 24457, F01D 2524, B21K 300
Patent
active
046326340
ABSTRACT:
A system for fixing nozzles to a power turbine stator casing, in which each nozzle sector is locked to the respective shroud by means of a key which has its two diverging vertical flanges inserted into a radial dovetail guide in the front surface of the shroud, where it is held in position by an elastic element or spring acting between the key and the inner wall of the guide, its lower vertical nose or beak acting as a shoulder abutment for a radial fork of the nozzle sector, which is mounted over, and kept centered by, the two projecting sidepieces of said key, which also has a projection at its upper end. Each shroud is locked to the stator casing by an insertion-fit between the uncinated edges of a cavity in the outer peripheral surface of the shroud and the corresponding uncinated edges of a circumferential cavity in the stator casing, the insertion being secured by a leaf spring acting between the mutually facing, uncinated edge-free walls of the two said cavities. Centering pins are also provided, inserted into contiguous facing semi-cavities provided in the front surface of the shroud and in the front surface of the stator casing respectively.
REFERENCES:
patent: 2843357 (1958-07-01), Spindler, Jr.
patent: 3501247 (1970-03-01), Tournere
patent: 3728041 (1973-04-01), Bertelson
patent: 4114368 (1978-09-01), Davis et al.
patent: 4119389 (1978-10-01), Gee
patent: 4142827 (1979-03-01), Vinciguerra
patent: 4255086 (1981-03-01), Roberts
Arrighi Leonardo
Vinciguerra Costantino
Goldberg Howard N.
Nuova Pignone S.p.A.
Wallace R. S.
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