离心力在旋转轴磁性流体密封中的作用

The Role of Centrifugal Force in the Magnetic Fluid Sealing for Revolving Shaft

转速较高或转轴直径较大时,离心力对密封压差有较大的影响。通过分析,提出了提高转轴密封压差的两种措施,根据粘性流体运动方程求出轴旋转时磁性流体内的压强分布,并通过数值计算分析了离心力对密封压差的影响。列出了磁场力、静密封压差等计算公式。按照本文的分析和计算方法,可以求出旋转密封压差并定量地分析离心力的影响。

Centrifugal force has considerably effect on the pressure difference in sealing as shaft speed and diameter being large. The measures for increasing pr essure difference of seal are proposed. According to the motion equation of viscous fluid, the pressure difference in magnetic fluid is solved: in addition, the effects of centrifugal force on the pressure difference are analyzed by numerical calculation.In the paper, the equations for magnetic fied force and equation for pressure difference in static sealing is given too, thus the effects of centrifugal force caa be quantitatively determined.