Patent ID: 9587621
Date: 2017-03-07
CPC Classifications: F03B,F05B,Y02E

Claim:
1. A water wheel impeller blade type electric power generating apparatus comprising: a floating body; an electric power generating apparatus body attached to the floating body, the electric power generating apparatus body floating under water by buoyance by the floating body and allowing inflow and outflow of a water stream; an anchorage unit anchoring the electric power generating apparatus body at a fixed position in the water stream; a rotor pivotally supported within the electric power generating apparatus body so as to be able to rotate, the rotor being disposed so as to be orthogonal to a direction of the water stream; an impeller blade group including a plurality of impeller blades attached on an outer periphery of the rotor so as to be automatically open at a lower side of the rotor and closed at an upper side of the rotor, the impeller blade group receiving force of the water stream flowing into the electric power generating apparatus body with open impeller blades to rotate the rotor; an inclined plate for guiding the water stream, having one end attached at an upper end of the electric power generating apparatus body at a water inflow side and a projecting tip approaching a vicinity of an impeller blade attached to the rotor; a bottom plate disposed in a flow channel below the inclined plate; and a power generator generating electric power by transmission of rotating force generated by rotation of the rotor, wherein an inclination angle of the inclined plate is set between 20° and 45°, a position of the projecting tip of the inclined plate is set within a range of ±30% of a diameter of the rotor above or below from a position corresponding to a shaft center of the rotor, and the bottom plate is positioned below a shaft center of the rotor by ¾ to 6/4 of the diameter of the rotor and provided to overlap with a portion where the inclined plate is provided; and wherein a bottom plate comprises a shape selected from the group consisting of: a horizontal part at a base end side, and an inclined part which is formed after the horizontal part ends short of a center of the rotor, and a horizontal part at a base end side and an inclined part which is formed by being made to project obliquely downward from the horizontal part at an inclination angle larger than the inclination angle of the inclined plate.