CENTRIFUGAL COMPRESSOR ROTOR SHAFT SEAL GROUP Russian patent published in 2017 - IPC F04D29/08 

FIELD: machine engineering.

SUBSTANCE: centrifugal compressor shaft seal group includes rigidly connected with each other the gas seal in the form of the seal rings and spacers package and the hydrostatic oil seal in the form of the inner and outer walls, limiting the inner ring cavity, opened towards the shaft. The oil seal ring cavity is connected through the opening in the outer wall with the interior cavity of the bearing housing and through the opening in the inner wall with the compressor flowpath. The inner ring cavity in the meridian section has the diffusion airfoil.

EFFECT: invention let to create the compressor shaft seal group, that does not require the supply of buffer gas during compressor starting and stopping, by means of eliminating the oil from the bearing support entry into the compressor flowpath.

2 cl, 3 dwg