大推程航天电连接器电磁分离机构的研究

The Research on the Electromagnetic Separable Mechanism for Aerospace Electric Connector with Large Extending Stroke

提出一种基于整体式导磁套、梯形衔铁等结构的大推程电磁分离机构,其原理通过上述特征形成径向、环形侧向与轴向并存的磁通分布实现大行程范围内的水平推力特性。通过建立数学模型,仿真对比分析该电磁分离机构在不同行程下的磁通分布,探讨行程一力特性及其产生机理,并获得导磁套盆形凹槽角度、薄壁厚度和衔铁端面形状等结构参数对其特性的作用规律。实验结果与仿真结果基本吻合,表明该电磁分离机构原型样机0.8 A电流激励时15mm推程内的额定推力均在63N以上,满足大推程航天电连接器直接驱动的要求。

Due to requirements of direct drive and compact structure for the electric connector in aerospace engineering,an electromagnetic separable mechanism with large extending stroke based on the integral flux sleeve and the trapezoidal armature was presented.The radial,annular lateral and axial fluxes are formed and coexisted in the above feature,resulting in the horizontal thrust force characteristic within large stroke.Magnetic flux patterns of the mechanism at various strokes were compared and analyzed based on the established mathematic model,and the stroke-force characteristics and its causes were discussed.The effect of the structural parameters,e.g.the groove angle and the thin-wall thickness of the sleeve,the terminal shape of the armature,on the characteristics was obtained.The experimental results are in accordance with the simulation ones.The prototype of the proposed electromagnetic separable mechanism can obtain the rated thrust force of over 63 N within the extending stroke of 15 mm with the exciting current of 0.8 A,which meets the requirement of the direct drive for large extending stroke aerospace electric connector.