Hydropower device combining lift and drag effects

A hydropower device combining lift and drag effects, characterized in that:

• comprises a shaft, and a lift-type runner, a first-stage drag-type runner, and a second-stage drag-type runner coaxially installed on the shaft, wherein the shaft is horizontally oriented and rotatably installed on a support frame, the first-stage drag-type runner and the second-stage drag-type runner are installed in series on the shaft, a disc generator installed on the shaft is positioned between the first-stage drag-type runner and the second-stage drag-type runner, the lift-type runner encircling the first-stage drag-type runner and the second-stage drag-type runner is installed on the shaft to form a combinative structure of one-stage lift-type runner disposed outer while two-stage drag-type runners disposed inner;
• under an action of flowing water, the lift-type runner generates a torque to rotate the shaft through a lift of a plurality of blades of the lift-type runner, the first-stage drag-type runner and the second-stage drag-type runner generate a torque to rotate the shaft through a drag of a plurality of blades of the first-stage drag-type runner and the second-stage drag-type runner, the hydrokinetic energy is converted into a mechanical energy to rotate a rotor of the disc generator,
• wherein the lift-type runner comprises three twisted lift blades connected to the shaft through struts, the struts are deployed at two ends of each of the twisted lift blades, the struts are connected with the shaft through shaft sleeves and keys, synchronizing the rotation of the twisted lift blades, the struts, and the shaft, an airfoil of the twisted lift blade is NACA0018 airfoil, and a twist angle of the twisted lift blades is 60°˜66°,
• wherein both of the first-stage drag-type runner and the second-stage drag-type runner comprise two twisted drag blades connected to the shaft, the first-stage drag-type runner and the second-stage drag-type runner are staggered in a circumferential direction with a circumferential staggering angle of 90°, a twist angle of the twisted drag blades is 80°˜100°.