中文摘要：

为了实现对轻、薄、小产品的平稳输送,利用圆形压电双晶片作为振动给料器的动力源,Z型弹簧片作为主振弹簧,并基于系统共振方法设计了新型压电驱动式振动给料器。介绍了圆形压电双晶片驱动式振动给料器的工作原理,建立了动力学模型,获得了系统固有频率表达式;分析了压电双晶片的振动模态,确定了一阶振型为工作振型。研制了振动给料器样机,利用样机测试了电压、频率与送料速度的特性曲线以及主振弹簧片角度对送料速度、送料稳定性、送料噪声的影响规律。试验结果表明：电压为150V,频率为142Hz时,输送电池帽的速度为8.5battery cap/s;频率为136～148Hz时,系统具备输送物料的能力,共振条件下（142Hz）输送速度最快;随着电压的升高,输送速度呈线性增加;输送的单体物料质量增加时,主振弹簧片安装角度宜变小。

英文摘要：

To convey light,thin and small products stably,apiezoelectric vibratory feeder with the Z leaf spring actuated by a round piezoelectric bimorph was developed base on the working principle of systemic resonance.The working principles of the vibratory feeder driven by a circular piezoelectric vibrator were introduced,the expression of natural frequency was obtained by establishing the dynamic model of the vibratory feeder,and the first order mode shape was defined as the working mode shape after analysis of the vibratory modal.Then,aprototype of the vibratory feeder was developed.Finally,the relations among voltage,frequency and feeding rate were measured,and the influences of the angle of leaf spring on feeding rates,stability and noise were explored.The experimental results show that the feeding rate of the vibratory feeder is 8.5 battery caps per second when the voltage is 150V and the frequency is 142Hz.The vibratory feeder can convey the products when the working frequency is from 136Hz to 148Hz,and the best feeding rate is at the resonancefrequency（142Hz）.Moreover,the feeding rate increases linearly with the driving voltage.As the mass of the conveying parts increases,the installation angle of the main vibrating spring decreases.