Abstract:Failure of double end face of mechanical seals in emulsion equipment occurs frequently in operation. To overcome this problem, the end surface is modified by adding spiral grooves. Then the influences of flushing pressure on film thickness, opening force, temperature and fluid leakage and other performance parameters are studied numerically by considering the viscosity-temperature relationship of fluid based on a computational heat transfer model of fluid film, which is established by using dynamic mesh and UDF method. A comparative analysis of the relation between thermal characteristics and flushing pressure as well as the friction power consumption is conducted before and after the modification. It is shown that when the flushing pressure increases, the film thickness decreases, the film pressure and temperature as well as the leakage of the flushing fluid rise. In the modified seal, the mean peripheral temperature is reduced significantly. With increasing flushing pressure, the mean temperature increment is smaller, and is considerably less affected by flushing temperature and flow rate, additionally, the seal stability is strengthened. Under the same working condition, the flushing pressure can be reduced by 0.1-0.5 MPa to prolong the seal life and reduce the flushing system energy consumption significantly.
陈汇龙, 任坤腾, 李同, 王彬, 赵斌娟. 乳液设备机械密封端面改型及冲洗降耗分析[J]. 排灌机械工程学报, 2017, 35(3): 235-242.
CHEN Huilong, REN Kunteng, LI Tong, WANG Bin, ZHAO Binjuan. End face modification and thermal characteristics of mechanical seal in emulsion equipment. Journal of Drainage and Irrigation Machinery Engin, 2017, 35(3): 235-242.
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