Rotary kinetic fluid motors or pumps – Working fluid passage or distributing means associated with... – Vane or deflector
Patent
1998-09-14
2000-04-18
Look, Edward K.
Rotary kinetic fluid motors or pumps
Working fluid passage or distributing means associated with...
Vane or deflector
415138, 415139, 4152082, 4152101, F01D 900
Patent
active
060507764
ABSTRACT:
A gas turbine stationary blade unit in which two stationary blades are formed in a single segment by divided shrouds functions to lessen the occurrence of cracks. Two stationary blades 1a, 1b are fixed to an outer shroud and an inner shroud, respectively. Each shroud is divided into two sections 2a, 2b and 3a, 3b. Flanges 4a, 4b are provided to connect the section together by bolts via boltholes 7. Likewise, flanges 5a, 5b are provided to form a similar connection or joint. If the two stationary blades 1a, 1b are fixed in a single segment by the shrouds which are not divided, a restraining force becomes larger, local stress occurs due to thermal stress and the frequency of crack occurrence increases. However, since the shrouds are divided respectively into two parts and jointed together by bolts, the crack occurrence is lessened. Also, pinholes are provided in opposing faces at the divided portion of the shrouds. Also, pins are inserted into the pinholes for connection of the divided shrouds, thereby relative movement between the divided shrouds is prevented and a strong jointed blade unit is provided.
REFERENCES:
patent: 4015910 (1977-04-01), Harmon et al.
patent: 4492517 (1985-01-01), Klompas
patent: 4720236 (1988-01-01), Stevens
patent: 5167485 (1992-12-01), Starkweather
Akagi Koichi
Hashimoto Yukihiro
Kataoka Masahito
Tada Hiroji
Tomita Yasuoki
Look Edward K.
Mitsubishi Heavy Industries Ltd.
Nguyen Ninh
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