磁性液体密封机理的研究  

Study of Seal Mechanism of Magnetic Fluid

作　　者：赵四海[1] 秦文艺[2] 

机构地区：[1]中国矿业大学 机电与信息工程学院,北京100083 [2]华北科技学院 机电工程系,北京101601

出　　处：《大连大学学报》2008年第3期115-118,共4页Journal of Dalian University

摘　　要：根据悬浮液的分散团聚理论,提出了磁流变效应的机理,并推导出磁流变液屈服应力公式。根据磁流变流体的磁流变效应,推导出了磁性液体密封压力的计算公式,磁性液体的密封压力与磁性液体的屈服应力、密封结构的长度和间隙相关。采用狭缝式磁流变液流变性能测试系统,测试了现有磁性液体的屈服应力,对已有的磁流体密封装置进行了实验研究,该公式计算结果与实验结果吻合。Magnetic fluid is one kind of magnetic rheological fluid. According to the theory of DLVO of Suspensions, the mechanism of magnetic rheological effect has been presented, and the formula of yield stress for MRF has been provided. According to the magnetic theological effect of magnetic fluid, the formula of seal pressure for magnetic fluid has been presented. The seal pressure for magnetic fluid is related with the yield stress of magnetic fluid, the length and clearance of the seal structure. Using the narrow gap rheometer, the yield stress of magnetic fluid that is prepared has been tested, and the known device of magnetic fluid seal has been studied, the result of the formula is same as that of the experimental result.

关 键 词：磁性液体 磁流变流体 屈服应力 密封 

分 类 号：TB381[一般工业技术—材料科学与工程] TH137[机械工程—机械制造及自动化]