The invention relates to a variable frequency excitation rotary piezoelectric generator, belonging to the technical field of power generation. The rotating shaft is mounted on the bottom shell, and the end of the rotating disk is mounted with an exciting magnet, which is a long bar magnet; the right side of the shell is mounted on the bottom shell, and the left side is mounted with an end cover; the top of the shell is provided with thread holes, and the inside side is provided with a convex platform; the adjusting bolt extends from the inside of the shell to the outside with a locking nut; the bottom of the adjusting bolt is provided with a circular convex platform, which extends into the opening of the loading block. The transverse displacement of the metal base plate is restrained by the guide block with a notch at both ends of the loading block and the convex platform, and divided into upper and lower piezoelectric vibrators in the middle part; the stimulated magnets are mounted on the upper and lower piezoelectric vibrators and installed relative to the exciting magnets; when the adjusting bolt is adjusted to the upper limit position, the upper and lower piezoelectric vibrators are within their elastic deformation, and the upper and lower pressures are in the lower limit position. The electric oscillator works within its maximum allowable compressive stress.
【技术实现步骤摘要】
一种可调频磁励旋转压电发电机
本专利技术属于发电
,具体涉及一种可调频磁励旋转压电发电机。
技术介绍
随着微功率无线传感器和分布式传感技术在健康监测、航天航空与程序控制系统等领域中的普及,作为其主要供能方式的化学电池所带来的环境污染问题变得不容忽视。为此,回收自然环境中振动能、人体运动能、旋转动能和流体能等能量的微小型发电机在国内外广受青睐。旋转式压电发电机是回收旋转体动能的重要方法之一,其实现能量回收的主要方式大致有惯性激励、拨动激励、冲击激励以及旋磁激励,其中旋磁激励由于无冲击、低噪声、安全性相对较高,而在近年来倍受关注。旋磁激励虽很大程度上解决了冲击与噪声的问题,但依然无法避免不同工作环境下激励频率与发电机固有频率不匹配导致的发电效率低下的问题。为了便于适应不同激励频率下的工作环境,可调频概念被提出,如中国专利201210592977.8、201310211521.7分别通过电控方式与引入非线性力进行调频,但前者的调频能力低下,而后者由于磁力的非线性作用,故不易精确控制;此外,两者都采用了悬臂梁式压电振子作为发电单元,故工作过程中容易损毁,安全性较差。 ...
【技术保护点】
1.一种可调频磁励旋转压电发电机,其特征在于:旋转轴经轴承安装在底壳上,端部安装有转盘,转盘端面上均布地镶嵌有激励磁铁,激励磁铁为长条形磁铁,其长边的中心轴线方向为指向转盘中心,且各激励磁铁间磁极方向相同;壳体的右侧安装在底壳上,左侧安装有端盖;壳体顶端设有螺纹孔,内侧设有凸台;调节螺栓经由螺纹孔从壳体内部伸出,外侧旋有锁紧螺母;调节螺栓的底部设有圆凸台,圆凸台伸入加载块的豁口中;金属基板两端分别安装在加载块和凸台上,中部通过带豁口的导向块约束其横向位移,并由此分为上下压电振子;导向块安装在端盖上;上下压电振子由金属基板与压电晶片粘结而成;受激磁铁安装在上下压电振子上,且与 ...
【技术特征摘要】
1.一种可调频磁励旋转压电发电机,其特征在于:旋转轴经轴承安装在底壳上,端部安装有转盘,转盘端面上均布地镶嵌有激励磁铁,激励磁铁为长条形磁铁,其长边的中心轴线方向为指向转盘中心,且各激励磁铁间磁极方向相同;壳体的右侧安装在底壳上,左侧安装有端盖;壳体顶端设有螺纹孔,内侧设有凸台;调节螺栓经由螺纹孔从壳体内部伸出,外侧旋有锁紧螺母;调节螺栓的底部设有圆凸台,圆凸台伸入加载块的豁口中;金属基板两端分别安装在加载块和凸台上,中部通过带豁口的导向块约束其横向位移,并由此分为上下压电振子;导向块安装在端盖上;上下压电振子由金属基板与压电晶片粘结而成;受激...
【专利技术属性】
技术研发人员:王淑云,唐红艳,张忠华,曾平,张可,蔡建程,柴超辉,任泽峰,
申请(专利权)人:浙江师范大学,
类型:发明
国别省市:浙江,33
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