一种紧凑型压电叠层直线电机驱动足的优化设计  

An Optimal Design of Compact Piezoelectric Linear Motor Drive Foot

作　　者：岳志鹏 陈西府[2] 卢倩[2] 李明 YUE Zhipeng;CHEN Xifu;LU Qian;LI Ming(School of Mechanical Engineering,Jiangsu University,Zhenjiang 212000,China;School of Mechanical Engineering,Yancheng Institute of Technology,Yancheng 224051,China)

机构地区：[1]江苏大学机械工程学院,江苏镇江212000 [2]盐城工学院机械工程学院,江苏盐城224051

出　　处：《机械与电子》2020年第3期6-10,共5页Machinery & Electronics

基　　金：国家自然科学基金资助项目(51405420,51805465);江苏高校“青蓝工程”资助人才项目(苏教2018-12);江苏省高校优秀科技创新团队(2017_33)。

摘　　要：在使用压电叠层时一般会设计防剪切机构,未设计防剪切机构时需要对驱动足结构进行仿真设计,减小压电叠层所受剪切力。为此,提出在无防剪切机构时电机驱动足的结构优化方法,并对一种紧凑型压电叠层直线压电电机驱动足进行仿真优化。通过优化把横向压电叠层输出端的旋转变形由1.333μm减小至0.061μm,纵向平移变形由1.911μm减小至0.749μm,机构的最大等效应力由253.35 MPa减小至189.68 MPa,显著改善了压电叠层的工作环境。提出一种并联S形弹簧机构,给出该结构的优化设计方法并进行仿真设计。仿真结果表明:该机构有较大的刚度范围,可以有效降低压电叠层所受剪切力;在相同刚度的情况下,具有弹簧宽度越大最大等效应力越小的特点。An anti-shearing mechanism is usually designed when applying the piezoelectric stack. A simulation design of the driving foot structure is required to reduce the shearing force of the piezoelectric stack when the anti-shear mechanism is not there. To this end, a optimization method of motor driven foot without the anti-shear mechanism was put forward, and an optimal simulation of the compact piezoelectric stack linear motor was proposed. Through optimizing, the rotation deformation of the output end of the transverse piezoelectric stack was reduced from 1.333 μm to 0.061 μm, the longitudinal translational deformation from 1.911 μm to 0.749 μm, and the maximum equivalent stress of mechanism from 253.35 MPa to 189.68 MPa. This significantly improved the working environment of the piezoelectric stack. A parallel S-shaped spring mechanism and an optimal design method were proposed. The simulation results show that the mechanism not only has a large stiffness range, but also can reduce the shear force of the piezoelectric stack effectively. The maximum equivalent stress becomes weaker while the spring width is increasing when they are at the same stiffness.

关 键 词：压电叠层 无剪切机构 剪切力 结构优化 

分 类 号：TH112[机械工程—机械设计及理论]