Low-pressure turbine heat shield

Rotary kinetic fluid motors or pumps – Bearing – seal – or liner between runner portion and static part – Between blade supported radial tip ring and static part

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Details

4151742, 415178, 4151701, 415177, B63H 114

Patent

active

052018466

ABSTRACT:
A turbine for an axial flow gas turbine engine has a heat shield arranged in an annular space between the outer casing and an array of butted nozzle segments. The heat shield is made of a material which expands when subjected to the high temperatures generated inside said turbine during operation. A mechanism is provided for blocking rotation about the axial axis and axial displacement in an aft direction of the heat shield, while not blocking radial expansion of the heat shield. The outer casing and heat shield are dimensioned and configured so that after thermal expansion the heat shield and outer casing contact to form a gastight chamber therebetween, whereas prior to thermal expansion the heat shield and outer casing do not form a gastight chamber therebetween. The heat shield is a sheet metal ring.

REFERENCES:
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patent: 3644057 (1972-02-01), Steinbarger
patent: 3730640 (1973-05-01), Rice et al.
patent: 4023919 (1977-05-01), Patterson
patent: 4053254 (1977-10-01), Chaplin et al.
patent: 4084919 (1978-04-01), Morris, Jr. et al.
patent: 4257222 (1981-03-01), Schwartz
patent: 4303371 (1981-12-01), Eckert
patent: 4512712 (1985-04-01), Baran, Jr.
patent: 4553901 (1985-11-01), Laurello
patent: 4925365 (1990-05-01), Crozet et al.

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