Involute screw water turbine for sea current power generation

The involute-screw water turbine for sea current power generation consists of vanes, main shaft and end cap. The two or more vanes in spiral arrangement have involue installation line around the mainshaft as center of the spiral cylindrical surface and each of the spiral line turns for 180 deg from the head to the tail. The present invention is simple in structure, convenient in maintenance and has relatively great rotation speed and torque, less vibration, great speed and high efficiency of the water turbine.