END GAS DYNAMIC SEAL OF TURBOMACHINE ROTOR SUPPORT Russian patent published in 2016 - IPC F16J15/34 F04D29/08 

FIELD: engines.

SUBSTANCE: invention relates to aircraft engineering, in particular to oil cavities of rotor supports of gas turbine engines and power plants. Disclosed is an end gas dynamic seal of turbomachine rotor support, comprising non-rotating sealing ring movable in axial direction, pressed by springs to a rotary bushing, at which there are gas chambers, as well as a secondary seal, characterised by that secondary seal and seal ring are made from same wear-resistant material with high heat conductivity, and secondary seal is made in form of a solid ring, which is installed in bore of housing and contacts ends with two additional rings, installed in same bore and made from material with low heat conductivity. Disclosed is another version of design of end gas dynamic seal of turbomachine rotor support, characterised by that secondary seal and seal ring are made of bronze BrS30. Heat generation in friction pair due to low friction coefficient insignificantly, deformations of rings are excluded, and wear of friction pair does not occur.

EFFECT: simplified seal design, preventing decompression of secondary seal both when changing temperature mode, and at high temperatures of sealed medium, reduced wear of secondary seal, higher reliability thereof in operation and, as a result, higher efficiency and longer service life of disclosed end seal.

1 cl, 2 dwg