Wave power generation device and method based on symmetrical double pendulum and return spring

By combining a symmetrical double pendulum with a return spring and using a ratchet and spiral spring design, the problem of insufficient energy capture and structural damage in traditional wave power generation devices under multi-directional waves and low-wave high sea states has been solved, achieving efficient and stable wave power generation.

CN121520118BActive Publication Date: 2026-03-20OCEAN UNIV OF CHINA
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Patent Information

Application Number
CN202610048745.8
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2026-01-15
Publication Date
2026-03-20
Estimated Expiration
2046-01-15

AI Technical Summary

Technical Problem

Traditional wave energy generation devices are prone to locking up in high-frequency waves, lack sufficient energy in low-frequency waves, and are easily damaged, making them difficult to adapt to multi-directional waves and small waves in high sea states.

Method used

The system employs a combination structure of symmetrical double pendulums and a return spring. Through the design of double ratchet wheels, double pendulum arms, and three pairs of pawls, the reciprocating motion of the double pendulums is converted into unidirectional rotation. Combined with a spiral spring and a conical large gear, energy rectification and storage are achieved. A locking device is used to lock the conical large gear for energy storage when the wave height is small, and the return spring adapts to the wave direction.

Benefits of technology

It improves wave energy capture efficiency and power generation stability, reduces the risk of structural damage, adapts to multi-directional waves and high sea states with small waves, realizes continuous power generation and intermittent energy storage, and reduces power generation voltage fluctuations.

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Abstract

The present application belongs to the field of wave energy generation, and particularly relates to a wave power generation device based on symmetric double pendulums and return springs and a power generation method. The device comprises a floating shell, the bottom of which is moored by an anchor chain. A double pendulum system that can rotate around a central main shaft is arranged in the shell, the double pendulum is constrained by a return spring, and is provided with a bidirectional driving pawl. The reciprocating motion of the pendulum is converted into unidirectional rotation through a ratchet-wound spring mechanism, and the wound spring plays a role of gentle energy and buffering energy storage. The rotary motion drives a generator to generate electricity through a speed increasing transmission chain composed of a conical gear, horizontal and vertical double gear. The device is provided with a lock mechanism, which locks the gear and stores energy in the wound spring when the wave is high, and releases the energy to realize intermittent power generation when the energy accumulates to a threshold value. When the wave direction is not perpendicular to the balance position of the double pendulum, the asymmetric swing torque will drive the entire central main shaft to rotate through the return spring and the limiting device, so that the double pendulum automatically aligns with the incoming wave direction, realizing omnidirectional self-adaptation.
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