Pressurising of lubrication chambers in a turbomachine with counter-rotating turbine
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United States of America Patent
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Nov 28, 2023
Grant Date -
Jan 12, 2023
app pub date -
Dec 1, 2020
filing date -
Dec 10, 2019
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Abstract
Disclosed is a turbomachine (10) with counter-rotating turbine for an aircraft, comprising: —a high-pressure body, —a low-pressure counter-rotating turbine (22), —a planetary-type mechanical epicyclic reduction gear (42), —a guide bearings (56-62) for the turbine shafts (36, 38), characterised in that said reduction gear (42) and certain of the bearings (60, 62) are housed in a lubrication chamber (86) supplied with oil and comprising dynamic seals (86a-86d), and in that the turbomachine comprises circuits (C1, C2) for pressurising these seals.
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