Patent ID: 6267551
Filing Date: 2001-07-31
Classification: F03B,F05B,Y02E,Y02P

Abstract:
A modular hydraulic turbine comprising:a cylindrical inlet unit through which water may enter, said inlet unit being made of one piece and having a longitudinal axis, a central cone-shaped hub provided with a central rearwardly opening cavity aligned with the longitudinal axis, and a plurality of incurved blades projecting radially at a same first angle all around said hub;a tubular outlet unit made of one piece, said outlet unit having a front portion and a rear portion, the front portion being cylindrical in shape and having a longitudinal axis coaxial with the axis of the cylindrical inlet unit, the rear portion extending at an angle relative to the front portion;means for rigidly connecting the inlet and outlet units to form a bent tubular water tight housing through which water may flow;a shaft coaxial with said longitudinal axis, said shaft having a front end portion extending at least partially and rotatably into the central cavity of the hub, a central portion extending within the front portion of the outlet unit, and a rear end portion engaging the rear portion of the outlet unit and extending outside said housing;a casing coaxial with the longitudinal axis and rigidly connected to the outlet unit outside of said outlet unit, said casing comprising sealing means for providing a watertight joint at a spot where the shaft extends outside the housing, and mounting means for rotatably supporting the rear end of said shaft; anda hollow rotor rigidly connected to the shaft, said rotor being mounted proximate the hub and comprising a central core and a plurality of incurved blades projecting radially outwardly at a same second angle all around the core, said second angle being in a direction opposite to the first angle of the blades of the hub, said rotor causing said shaft to rotate when water flows inside said housing.