搅拌轴磁性流体密封结构可靠性实验研究  

Experiment Study on Ferrofluid Seal Structure Reliability of the String Axle

作　　者：潘钰娴[1] 芮延年[1] 沈铭[1] 

机构地区：[1]苏州大学机电工程学院,江苏苏州215021

出　　处：《润滑与密封》2006年第6期151-153,共3页Lubrication Engineering

摘　　要：根据纳米磁性流体密封原理,设计了搅拌轴纳米磁性流体密封结构,对搅拌轴长径比、转速、励磁电流大小与密封性能关系进行理论计算和实验研究。理论计算表明所设计的搅拌轴纳米磁性流体密封结构是可靠的。实验结果表明:当磁性流体初始密封压差比较大时,随轴长径比的增大,密封压差迅速减小,而当初始密封压差较小时,轴长径比的增大对密封压差的影响较小;当轴的转速较低时,轴的转速对磁性流体密封性能影响不大;励磁电流大小与密封性能成正比,但随着电流的进一步增加,密封压差的增加变得不明显。The seal structure and the experiment equipment of nano ferrofluid seal for the string axle were designed according to the principle of the nano ferrofluid seal. The experiment study was made on the problems of the seal performance relation associated with the ratio of length to radiusof the string axle, the rotational speed and the excitation current. Calculation shows that the nano ferrofluid seal structure of the string axle is reliable. Experiment shows that when the initial seal pressure difference of ferrofluid is bigger, the seal pressure difference reduces quickly with the increase of length to radius, while it is smaller, length to radius has less influence on seal pressure difference. Rotational speed of string axle has less influence on seal performance when it is in low speed. Excitation current is in direct proportion to seal performance, but with the continuous increase, the increase of seal pressure difference becomes uneonspicuous.

关 键 词：纳米磁性流体 搅拌轴 密封 

分 类 号：TB42[一般工业技术]