A tension-compression vibration energy harvester

Abstract

The invention relates to a pulling and pressing type vibration energy harvester and belongs to the technical field of new energy and power generation. The upper wall of a hanging frame is fixed to a vibration main body through screws, a tension spring is fixed to the upper wall of the hanging frame and is arranged in an inner cavity of the hanging frame in a sleeved mode, the lower end of the tension spring is fixed to a cover plate, and the cover plate makes contact with the end face of the cylindrical wall of the hanging frame. The cover plate is fixed to the end of the cylindrical wall of a shell through screws, and an inertia block is sleeved with the inner cavity of the shell. Two metal sheets with piezoelectric patches bonded to the arc sections of the metal sheets are riveted with each other through rivets to form a piezoelectric vibrator, and the piezoelectric vibrator and supports riveted to the two ends of the piezoelectric vibrator jointly form energy converters. The upper side and the lower side of the inertia block are connected with the supports of the two energy converters through screws respectively, the other support of the energy converter above the inertia block is fixed to the cover plate through screws, and the other support of the energy converter below the inertia block is fixed to the bottom wall of the shell through screws. The pulling and pressing type vibration energy harvester has the advantages of being high in reliability, suitable for vibration environments of low frequency and large amplitude, capable of achieving vibration energy recovery in the longitudinal direction and any horizontal direction and wide in effective frequency band.

Description

technical field [0001] The invention belongs to the technical field of new energy and power generation, and in particular relates to a tension-compression vibration energy harvester. Background technique [0002] The micro-energy harvester constructed by using piezoelectric ceramic materials to recycle environmental vibration energy is considered to be an effective means for real-time self-power supply of portable micro-power electronic products and remote implanted sensor monitoring systems. Although some types of piezoelectric energy harvesters have been applied in reality, their adaptability to the vibration environment, reliability, and energy conversion efficiency are still relatively limited, which is not conducive to the further development of piezoelectric vibration energy harvesting technology. Promote apps. For the vibrating piezoelectric energy harvester, only when the natural frequency of the piezoelectric vibrator is equal to the vibration frequency of the envi...

AI Technical Summary

Problems solved by technology

[0003] The invention provides a tension-compression vibration energy harvester to solve the disadvantages of the existing vibration piezoelectric energy harvester, such as low reliability and poor environmental adaptability.

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