微量注射泵用直线超声电机的结构设计  

Structural design of a linear ultrasonic motor used to drive a microsyringe pump

作　　者：李南安 姚志远[1] 张百亮[1] LI Nan’an;YAO Zhiyuan;ZHANG Bailiang(State Key Laboratory of Mechanics and Control of Mechanical Structures,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China)

机构地区：[1]南京航空航天大学机械结构力学及控制国家重点实验室

出　　处：《振动与冲击》2020年第2期223-226,261,共5页Journal of Vibration and Shock

基　　金：国家自然科学基金(51275229);国家重大仪器设备开发专项(2012YQ100225)

摘　　要：改进了一种螺纹杆直线超声电机,并用于驱动微量注射泵。螺纹杆直线超声电机具有体积小、精度高、推力足、无磁干扰等特点。为了满足微量注射泵推力要求,针对螺纹杆直线超声电机不能施加预压力问题,提出了一种可施加预压力的螺纹杆直线超声电机。该直线超声电机包括底座、柱状定子、分体式螺纹杆动子。动子由动子主轴、套筒、预压力施加装置组成。当预压力调至33.9 N时,电机达到最大堵推力21 N,此时空载最大速度为4.5 mm/s。并设计了一款微量注射泵,该微量注射泵结构简单、抗磁干扰,分辨率达到nl级别,满足各种微量药物注射要求。A lead screw linear ultrasonic motor was improved and used to drive a microinjection pump.The improved lead screw linear ultrasonic motor has the characteristics of small size,high precision,sufficient thrust,and no magnetic interference.In order to meet the thrust requirement of the microinjection pump,a pre-stressed lead screw linear ultrasonic motor was designed for making the pre-pressure be able to apply on the threaded rod linear ultrasonic motor.The linear ultrasonic motor includes a base,a columnar stator,and a split type threaded rod rotor.The rotor is composed of a rotor spindle,a sleeve,and a pre-pressure application device.When the pre-pressure is adjusted to 33.9 N,the motor reaches a maximum plug thrust of 21 N,and the maximum no-load speed is 4.5 mm/s.The microinjection pump has simple structure and anti-magnetic interference property,and the accuracy reaches nl level,which meets various trace drug injection requirements.

关 键 词：超声电机 预压力施加装置 微量注射泵 

分 类 号：TH122[机械工程—机械设计及理论]