COMBINATION SEAL OF TURBOMACHINE Russian patent published in 2017 - IPC F16J15/16 F04D29/10 

FIELD: engines and pumps.

SUBSTANCE: turbomachine rotor seal comprises a graphite ring segments mounted in the housing and seals Compressed garter spring, an axial spring mounted in the seal housing cover fixed to the seal housing via a releasable connection. The seal comprises a contact sleeve mounted on the shaft and fixed to the latter in the axial and circumferential directions on the outer diameter of which establishes said graphite ring in segments, whole graphite ring mounted in the seal housing between the graphite ring in segments and cover thin-walled curved in cross-section of the elastic elements. The axial spring is installed between the neighboring ends of the seal housing and the graphite ring in segments, moreover, on the outer diameter of contact sleeve an annular groove, across which there are elastic elements mentioned circumferentially, each of which is capable of contacting a portion of its outer surface to the inner surface solid graphite rings and rigidly fixed to the inner surface of the annular groove.

EFFECT: invention provides efficiency to the working modes of the gas turbine engine in the absence of air pressure differential on the seal while reducing air leakages of sealing modes.

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