矿用降尘超声雾化喷嘴模态与谐响应分析  

Modal and Harmonic Response of Ultrasonic Atomizing Nozzle for Coal Mine Dust Suppression

作　　者：郭宇 刘邱祖[1] 王旭东[1] GUO Yu;LIU Qiuzu;WANG Xudong(College of Mechanical Engineering, Taiyuan University of Technology, Taiyuan 030024,China)

机构地区：[1]太原理工大学机械工程学院,山西太原030024

出　　处：《煤矿安全》2019年第3期96-98,102,共4页Safety in Coal Mines

基　　金：国家自然科学基金资助项目(51506138)

摘　　要：设计了一种谐振频率为18 kHz的超声雾化喷嘴。采用有限元分析进行模态分析和谐响应分析。通过对超声喷嘴的前10阶模态进行分析,获得其纵向振动的谐振频率为18 290 Hz。通过谐响应分析,获得其雾化圆盘、法兰盘及喷嘴前端面的频率-纵振位移曲线,频率为18 290 Hz时的工作应力图和总体变形图。分析得出,喷嘴在雾化圆盘处达到最大振幅4.6×10-6 m;法兰盘处振幅为5.5×10-9 m,与雾化圆盘的振幅相比,法兰盘处振幅非常小;在变幅杆的圆弧过渡处应力和变形达到最大。模拟结果显示出的纵向谐振频率18 290 Hz与理论值18 kHz十分接近,验证了设计的合理性和正确性。An ultrasonic atomizing nozzle with a resonant frequency of 18 kHz has been designed. The finite element analysis software was used to analyze the modal analysis and the harmonic response. Through the analysis of the first ten modes of the ultrasonic nozzles, the resonant frequency of the longitudinal vibration was 18 290 Hz. Through the harmonic response analysis, the frequency longitudinal vibration displacement curve of the atomized disk, flange plate and the nozzle front end face were obtained.Work stress diagram and the total deformation map at 18 290 Hz frequency were also obtained. The maximum amplitude of the nozzle was 4.6×10^-6 m at the atomized disk and the amplitude was 5.5×10^-9 m at the flange. Compared with the amplitude of the atomized disk, the amplitude of flange was very small. The stress and deformation of the horn at the arc transition reached the maximum. The results show that the longitudinal resonance frequency of 18 290 Hz was very close to the theoretical value of 18 kHz. It proves that the design was reasonable and correct.

关 键 词：煤矿降尘 超声喷嘴 有限元分析 模态分析 谐振频率 

分 类 号：TD714.4[矿业工程—矿井通风与安全]