Abstract: A water-flow power device includes a carrier, a first sprocket component, a second sprocket component, a first chain, a second chain, a plurality of blade structures, and an energy conversion unit. The carrier has a first end portion and a second end portion opposite to the first end portion. The first sprocket component is disposed at the first end portion of the carrier. The second sprocket component is disposed at the second end portion of the carrier. The first chain is configured to surround the first sprocket component and the second sprocket component. The second chain is configured to surround the first sprocket component and the second sprocket component. Two ends of each of the blade structures are respectively connected to the first chain and the second chain. The energy conversion unit is connected to the first sprocket component or the second sprocket component.

Abstract: A blade structure of a water flow power generation system includes a blade body and a tail flap. The blade body has a side porion. The tail flap has a side connection portion. The side connection portion is pivotally connected to the side portion of the blade body.

Abstract: A waterwheel apparatus having solar-planetary type blades and a solar-planetary type blade assembly thereof are provided. The waterwheel apparatus having solar-planetary type blades includes a frame, at least one solar-planetary type blade assembly, and a power unit. The solar-planetary type blade assembly is fixed to the frame. The solar-planetary type blade assembly includes a rotating disk, a central fixed portion, a plurality of blades, and a transmission mechanism. The rotating disk is capable of rotating relative to the central fixed portion. The blades are pivoted to the rotating disk, and capable of rotating relative to the rotating disk. The transmission mechanism is located between the rotating disk and the central fixed portion for transmitting power between the rotating disk and the central fixed portion, so that the blades can spin and also revolve around the central fixed portion. The power unit has an axle center, and the axle center rotates together with the rotating disk.