BI-DIRECTIONAL WAVE ENERGY CONVERTER

A bi-directional turbine device for generating electrical energy from wave movements, the turbine device being adapted to be arranged below the water line, wherein the bi- directional turbine device includes; a first shaft element with a second end section being connected to a platform for suspending the bi-directional turbine device, a first hub unit axially inserted on a first end section of the first shaft element, a first flange and a second flange fixed to the first end section at a predetermined distance from each other for limiting axial movement of the first hub unit along the first shaft element, a first shell element enclosing the first hub unit and the flanges for axially moving the first hub unit due to downward or upward water flow impacting the first shell element, a first plurality of blades encircling the first shell element and inserted to the first hub unit for providing torque to a first end section of the first shaft, wherein a base of each blade of the first plurality of blades is inserted through the first shell element and into the first hub unit, a pitch angle change assembly connecting at least one of the flanges and the first plurality of blades, wherein the pitch angle change assembly provide predetermined pitch angles of the first plurality of blades from the axial movement of the first hub unit.