SEAL ELEMENT FOR ROTARY MACHINE Russian patent published in 2009 - IPC F04D29/08 F04D29/42 

FIELD: instrument engineering.

SUBSTANCE: in a hood of a rotary machine, cast components are mounted along with seal elements in the form of rings placed in closed cavities of machine components. The seal ring comprises a base ring and a circular skirt axially extended from the base ring. The seal ring comprises circularly displaced cavities alternating with contact pads which allows for desired deformation of the seal ring material in the cavity. The contact pads between the cavities have cross-sectional surfaces gradually increasing from a free surface of the small area to generate compressive force required to increase the deformation exponentially with indicator exceeding 1. The cavities can be circumferentially displaced and opened at radially external surface of the seal ring. The seal ring can be made of elastic material which can be incompressible. The skirt can be narrowed towards moving away from the base ring. The base ring can have a projecting seal edge. On its free end, the skirt can have an oblique periphery edge.

EFFECT: reduced manufacturing tolerances.

24 cl, 4 dwg