论文部分内容阅读
为了在磁流体密封结构的密封间隙内获得最大的磁能积以及提高磁流体密封的耐压能力,在磁路设计理论和磁流体密封理论的基础上,对一种并联型的磁流体密封结构进行磁路设计,采用有限元法数值计算出磁流体密封结构中的磁场从而计算出磁流体密封耐压能力,并对计算结果进行了分析和讨论。结果表明:极靴与永磁体结合处的漏磁以及中间极靴轴向长度较短,导致中间极靴与两侧极靴下密封间隙内的磁感应强度差成非线性关系,也导致了磁路法低于有限元法计算出的磁流体密封耐压能力;中间极靴下密封间隙内磁感应强度较大导致两侧极靴下密封间隙内的磁感应强度差近似相等。
In order to obtain the maximum magnetic energy product in the sealing gap of the magnetic fluid seal structure and to improve the pressure resistance capability of the magnetic fluid seal, a parallel magnetic fluid seal structure is constructed based on the magnetic circuit design theory and the magnetic fluid seal theory Magnetic circuit design, using the finite element method numerical calculation of the magnetic field in the magnetic fluid seal structure to calculate the ability of magnetic fluid pressure seal, and the calculation results were analyzed and discussed. The results show that the magnetic flux density at the junction of the pole piece and the permanent magnet and the axial length of the middle pole piece are short, which leads to a non-linear relationship between the magnetic induction intensity in the gap between the middle pole piece and the lower pole on both sides, Lower than the finite element method calculated magnetic fluid seal pressure capacity; intermediate pole shoe seal gap greater magnetic induction resulting in both sides of the pole shield under the gap between the magnetic induction difference is approximately equal.