The utility model relates to a bending torsion composite piezoelectric energy capture device which can increase the energy capture ability, belonging to the technical field of water flow and air flow induced vibration energy capture, which solves the problem of low energy capture efficiency of the traditional single piezoelectric cantilever beam, and a series connected piezoelectric energy capture device, which only does bending movement, and there is no impact relationship between the cantilever beams, the series connected structure occupies a large area, and the series connected state is easy to reduce the structural rigidity, making the structure Instability. Technical points: the transverse piezoelectric cantilever beam and the longitudinal piezoelectric cantilever beam are arranged in a vertical staggered way, and they are linked by positioning limiters. They can do bending and twisting movements to capture energy at the same time. The spoiler column is connected in series with one end of the transverse piezoelectric cantilever beam, and the direction of the connection is consistent with the direction of water flow or air flow. The other end of the transverse piezoelectric cantilever beam is connected with the base through the main fixture The longitudinal piezoelectric cantilever beam is connected with the base through the auxiliary fixture; the invention can do bending and twisting movement at the same time, which is helpful to improve the energy capture efficiency and can be widely used in underwater or air energy capture.
【技术实现步骤摘要】
一种增大俘能能力的弯扭复合型压电俘能器
本专利技术涉及一种压电俘能器,具体涉及一种增大俘能能力的弯扭复合型压电俘能器,属于水流和空气流致振动俘能
技术介绍
流致振动俘能就是利用水流或空气流流过非流线型物体时,交替脱落的涡旋产生的涡激力激励俘能振子振动,从而产生电能的一项技术。首先,现有技术中的流致振动俘能多为单悬臂梁结构,即每个响应柱做涡激振动时仅带动一个压电悬臂梁进行振动,每个俘能振子工作时仅有一片压电悬臂梁进行弯曲发电。如文献“XiaobiaoShan,HongliangLi,YuancaiYang,JuFeng,YicongWang,TaoXie*.EnhancingthePerformanceofanUnderwaterPiezoelectricEnergyHarvesterBasedonFlow-inducedVibration.Energy.2019,172:134-140”中提出的单悬臂梁式俘能器结构。其结构虽然能实现较好的俘能效果,但每个压电振子工作时只能驱动一个压电悬臂梁进行俘能,俘能能力较弱,无法达到最好的俘能效果。其次,现有技术中的流致振动俘能器结构多为串接型。如专利申请“一种增大耦合作用的垂直串接排布式压电俘能器,CN109787512A,2019-05-21”中提出的垂直串接排布式压电俘能器结构。其结构虽然能实现较好的俘能效果,但其压电悬臂梁均仅做弯曲运动,悬臂梁之间无影响关系;串接结构占地面积较大,且串接状态易降低结构刚度,使结构失稳。
技术实现思路
本专利技术的目的是提供一种增大俘能能力的弯扭复合型压电俘能器,以解决传统 ...
【技术保护点】
1.一种增大俘能能力的弯扭复合型压电俘能器,其特征在于:包括扰流柱(A)、横向压电悬臂梁(B)、纵向压电悬臂梁(C)、主夹具(D)、副夹具(E)、底座(F)和定位限位器,所述横向压电悬臂梁(B)和纵向压电悬臂梁(C)呈垂直交错排布,两者通过定位限位器实现联动,两者可同时做弯曲及扭转运动进行俘能,所述扰流柱(A)与横向压电悬臂梁(B)的一端串接,且串接方向与水流或空气流方向一致,横向压电悬臂梁(B)的另一端通过主夹具(D)与底座(F)建立连接,纵向压电悬臂梁(C)通过副夹具(E)与底座(F)建立连接;所述主夹具(D),用于固定横向压电悬臂梁(B)及其末端扰流柱(A);所述副夹具(E)用于固定纵向压电悬臂梁(C);所述底座(F)用于主夹具(D)、副夹具(E)固定,及实现副夹具(E)横向位置调节。
【技术特征摘要】
1.一种增大俘能能力的弯扭复合型压电俘能器,其特征在于:包括扰流柱(A)、横向压电悬臂梁(B)、纵向压电悬臂梁(C)、主夹具(D)、副夹具(E)、底座(F)和定位限位器,所述横向压电悬臂梁(B)和纵向压电悬臂梁(C)呈垂直交错排布,两者通过定位限位器实现联动,两者可同时做弯曲及扭转运动进行俘能,所述扰流柱(A)与横向压电悬臂梁(B)的一端串接,且串接方向与水流或空气流方向一致,横向压电悬臂梁(B)的另一端通过主夹具(D)与底座(F)建立连接,纵向压电悬臂梁(C)通过副夹具(E)与底座(F)建立连接;所述主夹具(D),用于固定横向压电悬臂梁(B)及其末端扰流柱(A);所述副夹具(E)用于固定纵向压电悬臂梁(C);所述底座(F)用于主夹具(D)、副夹具(E)固定,及实现副夹具(E)横向位置调节。2.根据权利要求1所述的一种增大俘能能力的弯扭复合型压电俘能器,其特征在于:所述横向压电悬臂梁(B)由第一压电材料(5)贴附在横向弹性基体(6)上形成,横向弹性基体(6)的长度比第一压电材料(5)长,宽度比第一压电材料(5)宽;第一压电材料(5)沿长度方向贴附在横向弹性基体(6)中央,沿宽度方向与横向弹性基体(6)下端对齐;沿长度方向,横向弹性基体(6)的两端分别连接扰流柱(A)和主夹具(D);沿宽度方向,横向弹性基体(6)的上端焊有定位环(7),纵向压电悬臂梁穿过定位环(7),由定位环(7)带动纵向压电悬臂梁做弯扭复合运动;所述纵向压电悬...
【专利技术属性】
技术研发人员:单小彪,王艺聪,谢涛,
申请(专利权)人:哈尔滨工业大学,
类型:发明
国别省市:黑龙江,23
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