穿舱电缆密封结构力学特性研究

On mechanical behavior of leakproof stucture of cable

为防止深潜器穿舱电缆填料函发生渗漏现象,首先对填料函中填料进行受力分析,得出了填料沿轴向的轴向位移分布、填料与电缆接触面的径向位移及径向接触应力分布。然后,建立了方形填料有限元分析模型,仿真了填料压紧后的力学行为,并与理论结果进行了对比分析,结果表明:理论与仿真结果基本一致,轴向位移、接触面径向位移、径向接触应力均沿轴向呈指数形式减小;最后,提出方形与V形组合填料密封形式,并建立有限元分析模型,由组合填料与方形填料有限元分析的结果对比可知,在相同预紧力下,组合填料与海水接触处应力较方形填料大,组合填料的密封性能较好。

To prevent the leakage of cable stuffing boxes, a theoretical analysis model of square pack- ing is established to analyze the distribution of axial displacement,radial displacement and radial con- tact stress of the packing. A finite element model of square packing is also established to simulate the mechanical behavior of the packing. The result is then compared with the theoretical one. The studies show that the theoretical and simulation results are basically the same. The axial displacement, the ra- dial displacement of the contact surface and the radial contact stress exponentially decrease in the axial direction. The establishment of a finite element model of square and V-shape packing is proposed and the result is compared with that of FE of square packing. The results show that the stress of the com- posite packing contacting with the sea is bigger than that of the square packing and the seal of compo- site packing is better.