压电式小型超声振动料斗的研究

发布时间：2018-03-05 07:30

本文选题：振动料斗　切入点：压电驱动　出处：《辽宁工业大学》2012年硕士论文　论文类型：学位论文

【摘要】：近年来,压电驱动与控制技术在我国发展十分迅速,尤其在超声振动输送领域得到了广泛的应用。本文以国家自然科学基金项目(项目编号:50675094)的接续研究为背景,在现有的物料输送和供给技术的基础上,提出一种新颖的小型压电式超声振动料斗的结构方案并制作了相应的实物样机。基于传统的料斗结构形式,根据弹性体振动理论,提出了内部含有梯形齿的锥筒形给料压电振子的结构形式。利用ANSYS有限元软件对给料振子的振动模态进行动态分析,对给料振子的结构尺寸和陶瓷片的粘贴方案进行了优选。基于有限元动态设计结果,并考虑加工可行性及加工精度的要求设计并制作了锥筒形振子。研制了出料端内径为16mm的振子样机以及小型超声振动料斗装置。该样机以三阶面内弯曲模态为工作模态。采用激光测振仪并依据平面镜反射原理设计了相应的振子齿面测试系统,并对已加工的振子进行了振型和共振频率的测试。该振子的工作频率为22261Hz。实验结果表明,该振动料斗的振子可以产生比较均匀的行波。论文对振动料斗装置进行了整机的组装及运行效果的试验,当对振子施加一定的电压激励时,料斗对物料的配送有一定的可控性。
[Abstract]:In recent years, piezoelectric drive and control technology has developed rapidly in China, especially in the field of ultrasonic vibration transmission. Based on the existing technology of material transportation and supply, a novel structural scheme of a small piezoelectric ultrasonic vibration hopper is proposed and a corresponding prototype is made. Based on the traditional hopper structure and the theory of elastic body vibration, the structure of the cone-cylindrical feed piezoelectric vibrator with trapezoid teeth is proposed. The dynamic analysis of the vibration mode of the feed vibrator is carried out by using ANSYS finite element software. The structure size of feed oscillator and the paste scheme of ceramic chip are optimized. Based on the dynamic design results of finite element method, Considering the feasibility of machining and the requirement of machining precision, a conical cylindrical oscillator is designed and fabricated. A prototype of the oscillator with an inner diameter of 16mm at the discharging end and a small ultrasonic vibration hopper device are developed. The prototype takes the third-order in-plane bending mode as the working mode. The measuring system of the tooth surface of the oscillator is designed by using the laser vibration measuring instrument and according to the reflection principle of the plane mirror, and the mode shape and resonance frequency of the machined oscillator are tested. The operating frequency of the oscillator is 22261 Hz. The experimental results show that, The vibrator of the vibratory hopper can produce a more uniform traveling wave. The assembly and operation effect of the vibrating hopper are tested in this paper. When a certain voltage is applied to the vibrator, the hopper has a certain controllability to the distribution of the material.
【学位授予单位】：辽宁工业大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TH234;TB559

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