Design of new incense machine and simulation analysis of clearance seal flow field

LI Wei, HE Yibin, WANG Yanwei, SONG Long, FENG Xiaoliang, ZENG Yajun, HE De

(School of Mechanical and Electrical Engineering, Wuhan Institute of Technology, Wuhan 430073, China)

Abstract: Aiming at the problem of new incense machine existed seal dearance between the cylinder and the piston device during the movement, based on the study of new incense machine system, the sealed performance of the new incense machine was summarized,the flow simulation research on the leakage of cylinder piston device was proposed. The GAMBIT software was used to establish the mathematical model of the cylinder piston device, the FLUENT software was used to simulate the interior flow between cylinder and piston, and through simulation analysis of the internal flow field in different structure, the flow field distribution figure of seal clearance stress field between cylinder and piston was got. The results indicate that the sealing of the interier flow field between the cylinder and piston device is mainly controlled by the gap width. The leakage of cylinder piston device is adding with the pressurre and the gap wath, and the best width of seal clearance between piston and cylinder should be controlled below 0.3mm, there is a way to reduce leakage by decreasing the seal clearance, this method provides a direction to improve new Incense machine performance.

Key words: cylinder piston; clearance seal; optimization analysis; leakage