练泥机筒壁法向超声振动对泥料减黏降阻的影响  

Effect of Normal Ultrasonic Vibration on Viscosity and Resistance Reduction of Mud

作　　者：黄功强 戴哲敏 王景超 赖增光 HUANG Gongqiang;DAI Zhemin;WANG Jingchao;LAI Zengguang(Jingdezhen Ceramic University,Jingdezhen 333403,Jiangxi,China)

机构地区：[1]景德镇陶瓷大学,江西景德镇333403

出　　处：《陶瓷学报》2022年第2期310-316,共7页Journal of Ceramics

基　　金：江西省自然科学基金(20192BAB206023);江西省重点研发计划项目(20202BBEL53013)。

摘　　要：真空练泥机的构造及运动机理使得泥料在挤出成型过程中产生黏附阻力,造成泥料出泥速度分布不均、电机工作能耗增加等问题。为解决此问题,采用筒壁超声振动减阻方式对泥料进行减黏降阻。运用COMSOL多物理场对筒壁振动进行建模仿真验证;通过搭建筒壁超声振动实验平台,控制振动激励频率与振幅,当超声波振幅为0.04mm、频率为20kHz时,练泥机平均功率降低了19.8%,泥料边界速度提高,与仿真结果较为一致;表明采用超声振动方法降低泥料与筒内壁间切向阻力,改善泥料挤出速度分布,对泥料挤出具有较显著的减黏降阻增效作用。Due to the structure and movement mechanism of vacuum mud mixer, the mud will exhibit adhesion resistance in the extrusion process, resulting in uneven distribution of mud discharge speed and increase in motor energy consumption. In order to solve this problem, the cylinder wall ultrasonic vibration drag reduction method was adopted in this work. COMSOL multi physical field was used to model and simulate the cylinder wall vibration. By building cylinder wall ultrasonic vibration experimental platform and controlling the vibration excitation frequency and amplitude, when the ultrasonic amplitude is 0.04 mm and the frequency is 20 kHz, the average power of the mud mill is reduced by 20.62% and the mud boundary velocity is increased, which is consistent with the simulation result. The ultrasonic vibration method could be used to reduce the tangential resistance between the mud and the inner wall of the cylinder and hence improve the mud extrusion velocity distribution. Therefore, the viscosity and drag are significantly reduced and the efficiency for mud extrusion is increased.

关 键 词：练泥机 泥料 超声振动 速度梯度 减黏降阻 

分 类 号：TQ174.5[化学工程—陶瓷工业]