CONTACT RADIAL-BUTT GRAPHITE SEALING OF THE TURBO MACHINE ROTOR Russian patent published in 2018 - 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. Contact radial-face graphite seal of the rotor of the turbomachine comprises a set of thermobimetallic plates, an annular element and an axial spring serially installed in the annular cavity. In the oil supply sleeve, through holes are provided, communicating with the oil supply channels, and in the annular element through channels are provided, that are communicated with the oil cavity. Thermobimetallic plates are made of a material with a coefficient of thermal expansion greater than the material of the contact sleeve, with the possibility, when heating, of the displacement of the annular element in the axial direction before the communication of its through channels with the through holes of the oil supply sleeve.

EFFECT: technical result is a reduction in air leakage at the seal and an increase in the life of the graphite ring.

1 cl, 2 dwg