CAJ | 학술논문

为了提高大间隙磁性液体密封的耐压能力，在多级磁源磁性液体密封的基础上提出一种新型的磁性液体与迷宫交替式组合密封结构并设计一种普通的具有二级磁源的磁性液体与迷宫交替式组合密封结构。试验研究0.3 mm到0.7 mm间隙下具有机油基、煤油基和酯基磁性液体的交替式组合密封耐压能力，数值模拟该交替式组合密封中密封间隙内的磁场强度，由磁性液体密封耐压理论计算出该交替式组合密封中磁性液体密封的理论耐压值，对交替式组合密封的试验结果与该交替式组合密封中磁性液体密封的理论耐压值进行比较和分析。结果表明，与多级磁源磁性液体密封相比，该交替式组合密封显示良好的密封能力；当密封间隙大于0.4 mm时，该交替式组合密封的耐压能力随着间隙的增大而减小。
위료제고대간극자성액체밀봉적내압능력，재다급자원자성액체밀봉적기출상제출일충신형적자성액체여미궁교체식조합밀봉결구병설계일충보통적구유이급자원적자성액체여미궁교체식조합밀봉결구。시험연구0.3 mm도0.7 mm간극하구유궤유기、매유기화지기자성액체적교체식조합밀봉내압능력，수치모의해교체식조합밀봉중밀봉간극내적자장강도，유자성액체밀봉내압이론계산출해교체식조합밀봉중자성액체밀봉적이론내압치，대교체식조합밀봉적시험결과여해교체식조합밀봉중자성액체밀봉적이론내압치진행비교화분석。결과표명，여다급자원자성액체밀봉상비，해교체식조합밀봉현시량호적밀봉능력；당밀봉간극대우0.4 mm시，해교체식조합밀봉적내압능력수착간극적증대이감소。
To improve the pressure capability of magnetic fluid seal with a large gap, a new type of alternative combined magnetic fluid and labyrinth sealing structure is proposed on the basis of magnetic fluid seal with the multiple magnetic sources and a usual magnetic fluid sealing structure with two permanent magnets is designed. The pressure capabilities of the alternative combined seal with lubricating oil-based magnetic fluid, kerosene-based magnetic fluid and ester-based magnetic fluid under 0.3 mm to 0.7 mm sealing gap have been investigated by experimental methods. The magnetic field intensity is calculated by numerical method and the theoretical pressure capability of the magnetic fluid seal in the alternative combined seal is obtained according to the theoretical pressure formula of the magnetic fluid seal. The obtained experimental values of the combined seal have been compared and analyzed with the theoretical values of the magnetic fluid seal in the alternative combined seal. The results indicate that the alternative combined magnetic fluid and labyrinth seal shows good performance compared with the multiple magnetic sources and when the height of the sealing gap is larger than 0.4 mm, the pressure capability of the alternative combined seal decreases with the increase of the height of the sealing gap.