Electric actuating material rhythm-driven underwater propeller of combined structure

The invention provides an electric actuating material rhythm-driven underwater propeller of a combined structure. Water flow enters a controllable duck mouth through a duck mouth inlet and flows into a water supply hose from a hose inlet, after pressure exceeds a certain design value, a piston head is closed, and finally the water flows into a water supply opening to guarantee supply of water flow. Under the excitation of control electric signals, a drive electrode drives single-row multi-layer single IPMC muscle bars to be overlaid, and the same stimulation signals are applied to the single-row IPMC muscle bars to achieve movement of the IPMC muscle bars. Accordingly, the sector part of an elastic diaphragm is driven to make opening and closing movement, a water storage cavity in the adjacent side makes asynchronous opening and closing movement, a water storage cavity in the opposite side makes synchronous opening and closing movement, power supply of the underwater propeller is achieved, small-angle high-fr