深水卡爪式连接器密封优化分析及试验研究

Optimization analysis and experimental research on seal of subsea collet connector

针对深水卡爪式连接器的密封性能,以赫兹理论为基础,建立了透镜式密封的接触力学模型,得出半接触宽度、最大接触应力及压紧力之间的关系,指出透镜式密封圈的球面半径和法兰锥面角度是影响深水卡爪式连接器密封性能的主要结构参数.对深水卡爪式连接器的密封结构进行参数化建模,以最小压紧力为目标函数对其进行了优化,通过敏感性和相关性分析验证了设计参数对密封性能的影响,得到设计最小解.对优化前后的密封结构进行有限元仿真分析,证明优化后的结构可以有效地提高密封性能,最大接触应力增加了37.9%,接触宽度增加了36.0%.建立卡爪式连接器密封性能等效试验模型,对优化前后的密封结构进行静水压力试验,给出了相应的试验结果对比,证明了优化后结构尺寸的正确性和合理性.

To analyze the sealing capability of the subsea collet connector,a contact mechanical model of lens sealing was established based on Hertz theory.The relationships between the half contact width,the maximum contact pressure and the pressing force were obtained.The spherical radius of the lens seal gasket and the conical surface angle of the flange were mainly the structure parameters affecting the sealing performance of the subsea collet connector.A parametric model of the sealing structure of the collet connector was established,and the minimum pressing force was taken as the objective function,and then the optimization was carried out.The effect of design parameters on the sealing capability was verified by sensitivity and correlation analysis and the designed optimal solution was performed.The sealing structures before and after optimization were analyzed by finite element simulation.The optimized structure improved the sealing capability effectively.The maximum contact pressure increases by 37.9%,and the contact width increases by 36.0%.An equivalent experimental model of the sealing capability of the collet connector was established,and the sealing structures before and after optimization were tested by hydrostatic experiment.The experimental results were compared with each other,which validates that the optimized parameters of the structure are correct and reasonable.