Rotary kinetic fluid motors or pumps – Casing and spaced housing with space vented to working fluid
Patent
1994-03-28
1997-01-14
Look, Edward K.
Rotary kinetic fluid motors or pumps
Casing and spaced housing with space vented to working fluid
4152092, 415189, F01D 0514
Patent
active
055932738
ABSTRACT:
The reheat tub 10 in a double-flow steam turbine is provided with additional setback from the rotor buckets 16 by forming a three-part reheat tub construction including first and second discrete diaphragm segments 26a and third inner ring segments 28a. The annular arrays of these segments are dimensioned to enable greater axial spacing between the nozzles and buckets. To refurbish an in-service double-flow turbine, the damaged reheat tub is removed and cut along axial and radial part lines to form discrete first and second diaphragm segments. The diaphragm segment nozzles are then refurbished by machining an arcuate hook 46 with a tapered surface 48 on the inner ring portion. The annulus 28 is provided with a complementary hook 50 and tapered surface 52. The diaphragm and annulus segments 26a and 28a are aligned end-to-end and rotated to join the segments along the hooks.
REFERENCES:
patent: 4392778 (1983-07-01), Hess
patent: 5024579 (1991-06-01), Groenendaal et al.
patent: 5249918 (1993-10-01), Knorowski
patent: 5295301 (1994-03-01), Knorowski
General Electric Co.
Look Edward K.
Sgantzos Mark
LandOfFree
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