Patent ID: 8294291

Claim:
A turbine for a hydroelectric power installation for generating electrical energy from water passing over the turbine comprising: a rotor having a plurality of turbine blades and having a spherical hub; the turbine blades being connected to the rotor at the spherical hub region; the spherical shape of the hub matching with a shape of the turbine blades at their root where they couple to the rotor hub to ensure that the turbine blades can be set to any desired angle without a gap being present between the root of the turbine blades and the hub to couple the blades to the hub in a positively locking relationship; and a guide apparatus having a plurality of support blades which are arranged after the rotor and after the turbine blades of the rotor in the through-flow direction and which serve as a support apparatus of the turbine; a means to vary the pitch of the turbine blades of the rotor to alter a rotational speed of the rotor during operation while water is flowing over the turbine blades.