Energy harvesting device based on wave energy

Patent metadata

Field	Value
Publication number	US-12516652-B2
Application number	US-202217818287-A
Country	US
Kind code	B2
Filing date	Aug 8, 2022
Priority date	Sep 24, 2021
Publication date	Jan 6, 2026
Grant date	Jan 6, 2026

Abstract

An energy harvesting device based on wave energy comprises: a box body; a swing rod hinged with the box body, wherein one end of the swing rod extends into the box body, and a float is fixed at the other end of the swing rod; a base layer disposed inside the box body and provided with a plurality of piezoelectric patches in a length direction; and an energy transmission assembly fixed inside the box body and located between the swing rod and the base layer, one side of the energy transmission assembly is connected with one end of the swing rod extending into the box body, and the other side of the energy transmission assembly is in transmission connection with the base layer, wherein the energy transmission assembly converts the swinging of the swing rod into squeezing to the base layer.

First claim

The invention claimed is:

1 . An energy harvesting device based on wave energy comprising:
a box body ( 100 ); a swing rod ( 220 ) hinged with the box body ( 100 ), wherein one end of the swing rod ( 220 ) extends into the box body ( 100 ) and a float ( 210 ) is fixed to the other end of the swing rod ( 220 ); a base layer ( 410 ) arranged inside the box body ( 100 ) and provided with a plurality of piezoelectric patches ( 420 ) in a length direction; and an energy transmission assembly ( 300 ) fixed inside the box body ( 100 ) and located between the swing rod ( 220 ) and the base layer ( 410 ), one side of the energy transmission assembly ( 300 ) is connected with one end of the swing rod ( 220 ) extending into the box body ( 100 ), the other side of the energy transmission assembly ( 300 ) is in transmission connection with the base layer ( 410 ), wherein the energy transmission assembly ( 300 ) converts the swinging of the swing rod ( 220 ) into squeezing to the base layer ( 410 ), so that the base layer ( 410 ) is elastically deformed, and thus the piezoelectric patches ( 420 ) are driven to generate a piezoelectric effect to output voltage.

2 . The energy harvesting device based on wave energy according to claim 1 , wherein the energy transmission assembly ( 300 ) comprises a first connecting rod ( 340 ), a second connecting rod ( 350 ), a first gear ( 310 ) and a second gear ( 320 ), the first gear ( 310 ) is rotatably connected with the box body ( 100 ), the second gear ( 320 ) is rotatably connected with the box body ( 100 ) and is in transmission connection with the first gear ( 310 ), one end of the first connecting rod ( 340 ) is hinged with the swing rod ( 220 ), the other end of the first connecting rod ( 340 ) is hinged with the first gear ( 310 ), one end of the second connecting rod ( 350 ) is hinged with the second gear ( 320 ), and the other end of the second connecting rod ( 350 ) is hinged with the base layer ( 410 ).

3 . The energy harvesting device based on wave energy according to claim 2 , wherein the first gear ( 310 ) is in transmission connection with the second gear ( 320 ) through a third gear ( 330 ), and the number of teeth of the second gear ( 320 ) and the number of teeth of the third gear ( 330 ) are both less than the number of teeth of the first gear ( 310 ).

4 . The energy harvesting device based on wave energy according to claim 3 , wherein the first gear ( 310 ) is an internal gear, the second gear ( 320 ) and the third gear ( 330 ) are both external gears, the second gear ( 320 ) is located in the center of the first gear ( 310 ), wherein the first gear ( 310 ) and the second gear ( 320 ) are both meshed with the third gear ( 330 ), thereby forming a planetary gear mechanism.

5 . The energy harvesting device based on wave energy according to claim 4 , wherein the gear ratio of the first gear ( 310 ), the second gear ( 320 ) and the third gear ( 330 ) is one of 2:1:1, 3:1:1 and 4:1:2.

6 . The energy harvesting device based on wave energy claim 1 , wherein the middle of the base layer ( 410 ) bulges to form an arc-shaped structure, the piezoelectric patches ( 420 ) are distributed inside and outside the arc-shaped structure, and several piezoelectric patches ( 420 ) are sequentially connected in series.

7 . The energy harvesting device according to claim 1 , wherein the energy harvesting device based on wave energy also comprises an energy conversion assembly and a spring assembly ( 540 ) that are arranged inside the box body ( 100 ), the energy conversion assembly comprises a magnetostrictiverod ( 530 ) in a magnetized state and a closing coil ( 550 ), the closing coil ( 550 ) is sleeved on the magnetostrictiverod ( 530 ), the spring assembly ( 540 ) is fixed at an end of the magnetostrictiverod ( 530 ), and mechanical energy of the swing rod ( 220 ) is converted into pressure on the magnetostrictiverod ( 530 ) through the spring assembly ( 540 ).

8 . The energy harvesting device based on wave energy according to claim 7 , wherein the spring assembly ( 540 ) comprises a fixed disk ( 541 ), a guide ( 542 ), a spring ( 543 ) and a sliding block ( 544 ), the guide ( 542 ) is fixed at an end of the magnetostrictiverod ( 530 ) by the fixed disk ( 541 ), the guide ( 542 ) is provided with a slideway for the sliding block ( 544 ) to slide, the spring ( 543 ) is arranged in the slideway, two ends of the spring ( 543 ) are respectively connected with the fixed disc ( 541 ) and the sliding block ( 544 ), the sliding block ( 544 ) is located at an end of the slideway and located in a swing path of an end of the swing rod ( 220 ).

9 . The energy harvesting device based on wave energy according to claim 7 , wherein the energy conversion assembly also comprises a yoke ( 510 ) and a plurality of magnets ( 520 ), the yoke ( 510 ) is fixed inside the box body ( 100 ), the magnetostrictiverod ( 530 ) is disposed inside the yoke ( 510 ) with one end extending out of the yoke ( 510 ), and the magnets ( 520 ) are disposed inside the yoke ( 510 ) and distributed on two sides of the magnetostrictiverod ( 530 ).

10 . The energy harvesting device based on wave energy according to claim 7 , wherein the magnetostrictiverod ( 530 ) is made of one of Terfenol-D, Galfenol and Metglas.

Assignees

• Univ Guangzhou

Inventors

• Liu Airong
• Dong Kejie
• Yang Zhicheng
• Fu Jiyang
• Xie Wengao
• Zhang Fan
• Zhang Yixiao

Classifications

• H02N2/186

  Vibration harvesters · CPC title

• F05B2220/709

  Piezoelectric means · CPC title

• F05B2260/503

  using gears · CPC title

• Y02E10/30

  Energy from the sea, e.g. using wave energy or salinity gradient · CPC title

• F03B13/16 Primary

  using the relative movement between a wave-operated member, {i.e. a "wom"} and another member, {i.e. a reaction member or "rem"} · CPC title