HUANG Gongqiang, DAI Zhemin, WANG Jingchao, LAI Zengguang

(Jingdezhen Ceramic University, Jingdezhen 333403, Jiangxi, China)

Abstract: 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.

Key words: mud mixer; mud; ultrasonic vibration; velocity gradient; viscosity and drag reduction