FIELD: mechanical engineering; propeller turbines. SUBSTANCE: invention is designed for improvement of propeller turbine equipped with lubrication system. Proposed hydraulic machine has impeller or rotor with hub housing and vanes or blades installed in bearings lubricated with oil and mounted in hub housing for rotation. Sealing devices are installed between bearings and surrounding water. Sealing devices have first circular sealing member and second circular sealing member arranged from inner side relative to first sealing member. Round space between first and second sealing members communicates through channel with water at high-pressure side of impeller blades to make pressure in round space equal to water pressure at high-pressure side. EFFECT: contamination of ambient atmosphere is reduced to minimum. 5 cl, 4 dwg
