柔性驱动式压电活塞气体压缩机的设计与试验  

Structure and performance of piezoelectric piston gas compressor with flexible drive

作　　者：王建涛 赵丁选 杨皓仁 蔡帅 张乾成 WANG Jian-tao;ZHAO Ding-xuan;YANG Hao-ren;CAI Shuai;ZHANG Qian-cheng(School of Vehicles and Energy, Yan Shan University, Qinhuangdao 066004, China;School of Mechanical Engineering, Yan Shan University, Qinhuangdao 066004, China;Postdoctoral Research Station of Mechanical Engineering, Yan Shan University, Qinhuangdao 066004, China)

机构地区：[1]燕山大学车辆与能源学院,河北秦皇岛066004 [2]燕山大学机械工程学院,河北秦皇岛066004 [3]燕山大学机械工程博士后流动站,河北秦皇岛066004

出　　处：《光学精密工程》2020年第10期2267-2275,共9页Optics and Precision Engineering

基　　金：中国博士后基金资助项目(No.2019M661050);河北省博士后择优资助项目(No.B2019003022);河北省高等学校科学技术研究项目资助(No.QN2020238);燕山大学博士基金资助项目(No.BL18052)。

摘　　要：为了提高容积式压电流体驱动器的气体驱动能力,提出了一种柔性驱动式压电活塞气体压缩机,并从理论与试验两个方面对气体压缩机的工作特性进行研究。建立了柔性支撑压电振子的振动模型,并通过仿真获得了驱动频率及电压对压电振子振动特性的影响规律。将柔性支撑压电振子与活塞式泵腔结合,构造一种柔性驱动式压电活塞气体压缩机,建立气体压缩机的流量及压力计算模型,获得腔高和活塞振幅等参数对压缩机输出性能的影响规律。结果表明,利用系统共振原理可以提高压缩机的气体驱动性能,同时存在最佳的系统结构参数使压缩机性能最优。在此基础上进行相关试验,试验结果表明压缩机的气体输出流量和压力与驱动电压近似成线性关系,且受驱动频率影响明显,当系统工作在共振状态时系统输出性能最佳。设定压电振子的驱动电压为220 V,此时测得压缩机的气体输出流量和压力分别为190 mL/min和20.3 kPa。In this paper,a piezoelectric piston gas compressor with a flexible drive is proposed to improve the gas driving capacity of a volumetric piezoelectric fluid driver.The operation characteristics of the gas compressor are theoretically and experimentally studied.A vibration model of the flexible support piezoelectric vibrator is developed.The effects of driving frequency and voltage on the vibration characteristics of the piezoelectric vibrator are analyzed through simulations.The flexible support piezoelectric vibrator is combined with a piston pump cavity to construct a piezoelectric piston gas compressor with a flexible drive.A flow-pressure calculation model of the gas compressor is developed to analyze the influences of cavity height and piston amplitude on the compressor output performance.The system resonance principles can improve the gas drive performance of the compressor.In addition,certain structural parameters of the system can optimize the compressor performance.Test results show that the gas output flow and pressure of the compressor are approximately linearly related to the driving voltage and significantly affected by the driving frequency.The best system output performance is obtained when the system operates in the resonance state.When the driving voltage of the piezoelectric vibrator is 220 V,the gas output flow rate and pressure of the compressor are 190 mL/min and 20.3 kPa,respectively.

关 键 词：压电振子 共振 活塞 柔性支撑 压缩机 

分 类 号：TH321[机械工程—机械制造及自动化]