HYDROTURBINE UNIT Russian patent published in 1995 - IPC

FIELD: power engineering. SUBSTANCE: turbine case provides communication between headwater and tailwater conduits. Case has crossing walls. Wall arranged along rotor shaft is provided with projection having acute- or right-angles top. Rotor has aerodynamic airfoil blades arranged parallel to shaft. Projection top faces blades and is offset in respect to transverse axis of case by turn through acute central angle for providing clearance with surface compressed by blades. Other wall of case arranged along shaft has additional projection whose top is offset in respect to transverse axis of case towards direction of rotation. EFFECT: improved design. 5 cl, 5 dwg