Combined device for generating power by utilizing wave energy and tide energy

The utility model provides a combined device for generating power by utilizing wave energy and tide energy, comprising a floating body, an energy acquisition device I, an energy acquisition device II and a power generating device and the like, wherein the energy acquisition device I comprises an impeller, a bracket, a speed-increasing transmission device, a soft shaft and the like; and the energy acquisition device II comprises a gas storing tank, a cylinder, a piston, a connecting rod, a steam turbine and the like. The combined device is characterized in that: (1) the floating body is fixed under sea level by an anchor chain; the impeller is fixed by the bracket and transmits torque to the speed-increasing transmission device by the soft shaft so as to drive the power generating device to generate power; and (2) the gas storing tank floats on the sea, when the gas storing tank moves up and down along waves, the connecting rod can push the piston to compress the gas to the gas storing tank, and when the gas in the tank reaches certain value, a pressure valve can be opened automatically to push the steam turbine to rotate and further drive the power generating device to generate electric energy. In the power generating equipment provided by the utility model, two modes can be adopted for energy acquisition simultaneously, and the sea wave energy and the tide energy can be doubly and efficiently utilized, so the economic benefit is good.