Rotary kinetic fluid motors or pumps – Bearing – seal – or liner between runner portion and static part – Selectively adjustable
Patent
1988-05-11
1989-09-05
Garrett, Robert E.
Rotary kinetic fluid motors or pumps
Bearing, seal, or liner between runner portion and static part
Selectively adjustable
415134, 415138, 4151736, F01D 1108
Patent
active
048633453
ABSTRACT:
The invention is aimed at avoiding excessive wear of the tips of the turbine blades in deceleration of a gas turbine engine, and provides a control ring which is loosely supported by fixed structure. The control ring is made from a material which reacts more slowly to thermal changes than the support structure and firstly being loosely supported thereby, avoids the stresses which would be otherwise experienced by the fixed joining of differing materials for operation in varying temperatures. Secondly, on deceleration of the associated engine with consequent fall in operating temperature, the control ring contracts more slowly than the turbine assembly and so avoids engaging the shrouds abradable linings with the tips of the blades.
REFERENCES:
patent: 2654566 (1953-10-01), Boyd et al.
patent: 3892497 (1975-07-01), Gunderlock et al.
patent: 4565492 (1986-01-01), Bart et al.
patent: 4759687 (1988-07-01), Miraucourt et al.
Hirst Roy T.
Thompson Alfred R.
Garrett Robert E.
Kwon John T.
Rolls-Royce plc
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