Sealing performance of the spheric joint for thread compound was analyzed with energy loss method,and thread off failure on spheric joint was analyzed by finite element method.

• 分析结果表明,在中试系统矿浆流速下,深海采矿扬矿系统球铰接头部分螺纹机加工产生的自然通道螺纹脂有良好的密封性能。