Energy conversion device and application thereof

The invention relates to an energy conversion device comprising an energy conversion device stand, heavy objects, heavy object carrying racks, combined springs, chains, ratchets, a transmission shaft, flywheels, a limiting latch and return springs. The transmission shaft is arranged on the energy conversion device stand; the flywheels are respectively arranged on two ends of the transmission shaft; the ratchets are arranged on the transmission shaft; the chains are arranged on the ratchets; one end of each ratchet is fixed on the limiting latch, and the other end is connected with one end of each combined spring; the same horizontal plane of the inner side wall of the energy conversion device stand is provided with a paw pair which is matched with the limiting latch; one end of each return spring is fixed on the limiting latch, and the other end is fixed on each heavy object carrying rack; one end of each combined spring is connected with the heavy object carrying rack; each heavy object carrying rack is provided with a steel spring plate; and the heavy objects are fixed on the steel spring plates. The energy conversion device has simple structure, low manufacturing cost, high effectiveness and good source following performance, occupies less space and can be used on the sea and the land and in the air.