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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。
The optimal design of the anti-twisting device with high torque is provided, and the design parameters of the anti-twisting device are determined according to the drill bit experiment. The design principle of the anti-twisting device is proposed and the mechanical computing model of the anti-twisting device is established. The relationship between the radial pressure and the torque is obtained, and the optimal parameters of the anti-torsional shear blade are obtained. The slide-type anti-torsion device with six-link mechanism is designed. According to its structural principle, the relationship between spring stiffness and radial pressure Theoretical calculation model, and four kinds of stiffness spring optimization. The results show that when using a spring with a stiffness of 19.61 N / mm, the slide anti-twist device can theoretically provide a reverse torque of 73-94 N · m to meet the requirement of bedrock drilling under ice.