基于超声振动的微液滴生成装置设计与实验研究
发布时间：2018-11-12 09:21
【摘要】：设计了一种基于V型直线超声电机驱动的微液滴生成装置用于制备具有微米级尺寸的微液滴。此装置由基于V型直线超声电机驱动的微液滴生成部件、基于V型直线超声电机的三维位移控制平台和基于压电振子的微液滴分离部件组成。其中,生成部件包含超声电机、医用注射器、硅胶软管和自制的玻璃基微喷嘴。利用控制器驱动直线超声电机高精度地移动,由滑台推动注射器,在玻璃基喷嘴尖端产生附着的微小液滴;再利用压电振子激发杆状喷嘴的固有振型,使得附着的液滴克服粘性力从微喷嘴尖端分离,落在一定的范围内,并计算生成的球形微液滴的半径。以蒸馏水作为初始液体,探究此装置生成的微液滴的特性。研究结果表明,蒸馏水在直线电机的精密驱动下,在微喷嘴尖端形成附着的球冠状液滴。通过分离部件的振动,附着的液滴克服自身的粘性力从喷嘴尖端分离,形成球形液滴,通过测量得出此装置生成的球形液滴的半径小于40μm。
[Abstract]:A micro droplet generating device based on V type linear ultrasonic motor was designed to fabricate micro droplets with micron size. The device consists of a micro droplet generating unit driven by a V type linear ultrasonic motor, a 3D displacement control platform based on a V type linear ultrasonic motor and a micro droplet separation unit based on a piezoelectric vibrator. The generating parts include ultrasonic motor, medical syringe, silicone hose and self-made glass-based micro-nozzle. The linear ultrasonic motor is driven by the controller to move with high precision, and the syringe is driven by the slider to produce tiny droplets attached to the tip of the glass based nozzle. Then the natural mode of the rod nozzle is excited by piezoelectric vibrator, which makes the attached droplet to separate from the tip of the micro nozzle and fall within a certain range, and calculate the radius of the spherical microdroplet. Using distilled water as the initial liquid, the characteristics of the microdroplets generated by this device were investigated. The results show that the spherical droplets attached by distilled water are formed at the tip of the micro nozzle under the precise driving of the linear motor. By the vibration of the separating parts, the attached droplets can overcome the viscous force and separate from the tip of the nozzle to form spherical droplets. The radius of the spherical droplets generated by this device is less than 40 渭 m.
【作者单位】： 南京航空航天大学机械结构力学及控制国家重点实验室;
【基金】：国家自然科学基金项目(No.51275229) 国家重大仪器设备开发专项(No.2012YQ100225)资助~~
【分类号】：TM359.9
本文编号：2326704
[Abstract]:A micro droplet generating device based on V type linear ultrasonic motor was designed to fabricate micro droplets with micron size. The device consists of a micro droplet generating unit driven by a V type linear ultrasonic motor, a 3D displacement control platform based on a V type linear ultrasonic motor and a micro droplet separation unit based on a piezoelectric vibrator. The generating parts include ultrasonic motor, medical syringe, silicone hose and self-made glass-based micro-nozzle. The linear ultrasonic motor is driven by the controller to move with high precision, and the syringe is driven by the slider to produce tiny droplets attached to the tip of the glass based nozzle. Then the natural mode of the rod nozzle is excited by piezoelectric vibrator, which makes the attached droplet to separate from the tip of the micro nozzle and fall within a certain range, and calculate the radius of the spherical microdroplet. Using distilled water as the initial liquid, the characteristics of the microdroplets generated by this device were investigated. The results show that the spherical droplets attached by distilled water are formed at the tip of the micro nozzle under the precise driving of the linear motor. By the vibration of the separating parts, the attached droplets can overcome the viscous force and separate from the tip of the nozzle to form spherical droplets. The radius of the spherical droplets generated by this device is less than 40 渭 m.
【作者单位】： 南京航空航天大学机械结构力学及控制国家重点实验室;
【基金】：国家自然科学基金项目(No.51275229) 国家重大仪器设备开发专项(No.2012YQ100225)资助~~
【分类号】：TM359.9
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