RADIAL-END SEAL OF TURBOMACHINE ROTOR Russian patent published in 2016 - IPC F16J15/00 

FIELD: machine building.

SUBSTANCE: invention relates to machine building and can be used in design of rotor-dynamic machines for sealing of annular slits between the stator and rotor. Radial-end seal of the machine rotor contains an annular element installed in the housing, in which slots are made so that an annular array of pins is formed; the array has projecting platforms enveloping the shaft, and a rim whose outer surface is in contact with the inner surface of the housing. Seal is equipped with a graphite ring, either split or segmented, installed in the housing, contacting with it along the face and having annular grooves. In the area of the graphite ring internal diameter, on the side of the ring element, there is an annular groove taking up protruding platforms; at that, between their outer surfaces and inner surface of the graphite ring an axial clearance is shaped. Between the outer surface of the graphite ring and inner surface of the housing a deploying spring is installed, while an axial spring is installed between the graphite ring and ring element. Expanding ring is installed at the opposite side of the ring element and is fixed in the housing, while the annular plate is installed in the housing between the ring element and expanding ring and contacts with them along the faces.

EFFECT: invention reduces air leaks in all operating conditions of the seal, and also provides for separation of oil and air cavities of the device.

1 cl, 1 dwg