CAJ | 학술논문

选用大型圆环形压电振子作为超声物料输送装置的换能器,通过对压电陶瓷片的极化分区方式重新设计,实现了同一压电振子具有多阶弯曲模态的多工作频率设计方案. 利用AN?SYS有限元分析软件对环形输送振子结构进行动态设计,并对输送振子在20~50 kHz范围内的各阶弯曲振型及其对应的固有频率进行了数值分析,确定了振子的结构尺寸,并优选出输送振子的B0,11、B0,15阶弯曲模态及对应的固有频率. 在理论分析的基础上,设计制作了大型环状超声物料输送装置的实验样机,并对输送装置输送振子的弯曲模态及谐振频率进行了实验验证,实验结果表明输送振子的B0,11、B0,15阶弯曲模态的实际频率与有限元分析结果有一定的偏差,但在同阶弯曲模态下的两个谐振频率的频率差几乎为零. 可为超声输送速度等宏观输送性能的理论及实验研究提供测试平台.
선용대형원배형압전진자작위초성물료수송장치적환능기,통과대압전도자편적겁화분구방식중신설계,실현료동일압전진자구유다계만곡모태적다공작빈솔설계방안. 이용AN?SYS유한원분석연건대배형수송진자결구진행동태설계,병대수송진자재20~50 kHz범위내적각계만곡진형급기대응적고유빈솔진행료수치분석,학정료진자적결구척촌,병우선출수송진자적B0,11、B0,15계만곡모태급대응적고유빈솔. 재이론분석적기출상,설계제작료대형배상초성물료수송장치적실험양궤,병대수송장치수송진자적만곡모태급해진빈솔진행료실험험증,실험결과표명수송진자적B0,11、B0,15계만곡모태적실제빈솔여유한원분석결과유일정적편차,단재동계만곡모태하적량개해진빈솔적빈솔차궤호위령. 가위초성수송속도등굉관수송성능적이론급실험연구제공측시평태.
This paper selects the circular piezoelectric vibrator as the transducer of the ultrasonic vibration feed?ing device, and implements the design scheme in which one vibrator has more than one vibrating modes and fre?quencies by redesigning the polarization and the layout of the piezoelectric ceramics. The finite element software ANSYS is used to carry out dynamic analysis on the structure of circular-ring vibrator, and to obtain the mode parameters of the established model. The numerical analysis on the different bending shapes and their corre?sponding frequencies in the range of 20 kHz~50 kHz are also carried out. Finally, the structure size is deter?mined, and the B0,11 and B0,15 bending modes as well as their corresponding natural frequencies are selected. A ring type piezoelectric ultrasonic device for feeding experiment is manufactured based on the theoretical re?search. The bending vibration modes and resonant frequencies are tested. The results show that although there is a frequency difference between the theoretical analysis and the practical value, the frequency difference between the same bending modes is almost zero.