HIGH-PRESSURE TURBINE Russian patent published in 2012 - IPC F01D11/02 

FIELD: engines and pumps.

SUBSTANCE: proposed device comprises shaft running in bearing with oil cavity, internal sleeve and labyrinth seals between disc and bearing. Labyrinth higher-pressure air cavity communicates via labyrinth radial perforation with external annular slotted cavity. Said external annular slotted cavity is arranged between labyrinth and shaft ob bearing side in radial direction and between disc and bearing in axial direction. Besides, said external annular slotted cavity outlet communicates with internal annular slotted cavity via radial shaft openings nearby bearing. Internal annular slotted cavity is arranged between inner sleeve and shaft to communicate with low-pressure cavity located on disc side via radial shaft openings nearby disc.

EFFECT: higher reliability.

2 dwg