冰下基岩电动机械取心钻具反扭装置设计

Design of antitorque system of cable-suspended electromechanical drill for subglacial bedrock coring

对提供大扭矩的反扭装置进行优化设计,并根据钻头实验确定反扭装置设计参数;提出反扭装置设计原则,建立反扭装置力学计算模型,并对不同尖角滑刀式反扭装置进行理论计算,得出其径向压力和扭矩关系曲线,确定最佳的反扭滑刀参数;设计具有六连杆机构的滑刀式反扭装置,根据其结构原理,建立弹簧刚度与径向压力理论计算模型,并对4种刚度弹簧进行优选。研究结果表明：采用刚度为19.61 N/mm的弹簧时,滑刀式反扭装置理论上可提供73~94 N·m反扭矩,满足冰下基岩钻进的需要。

Antitorque system with high antitorque was optimized and redesigned. The antitorque system design principle was proposed and the mathematical model was built up for calculation of its main parameters. Through theoretical calculation for double tips skates antitorque system, the dependence of radial force on torque was investigated, and the parameters of double tips skates antitorque system to provide high antitorque were obtained. A new antitorque system with six-bar mechanism was designed. The mathematical model for calculation of radial force provided by spring was built, and four kinds of spring were optimized. The results show that skates antitorque system with 19.61 N/mm spring can hold the antitorque in rang of 73-94 N·m theoretically. And these parameters can meet the requirement of armored cable-suspended electromechanical subglacial bedrock core drilling.