自动钻机用夹持机构的结构及轻量化设计

通过分析自动钻机拧卸钻杆螺纹的过程,结合双夹持器的应用,研发了一种新型钻杆夹持机构,并分析了此种机构的特点和运动原理;利用理论力学的方法计算机构的最大夹持力,确定了油缸相应参数的选择;为了检验峰值卸扣载荷下夹持机构的结构强度特性,利用有限元分析软件进行校核,并考虑到强度与夹紧力条件,进行了轻量化设计。分析结果表明,此夹持机构的结构强度优良,可满足自动钻机的使用要求。

Structure and Lightweight Design of Clamping Mechanism for Automatic Drilling Rig

By analyzing the process of screwing and unscrewing the thread of the drill pipe of the automatic drilling rig,combined with the application of the dual gripper,a new type of clamping mechanism for the drill pipe has been developed,and the characteristics and movement principle of this mechanism have been analyzed.Using the method of theoretical mechanics to calculate the maximum clamping force of the mechanism,the selection of the corresponding parameters of the cylinder was determined.In order to test the structural strength characteristics of the clamping mechanism under peak shackle load,the finite element analysis software was used for verification,and considering the strength and clamping force conditions,a lightweight design was carried out.The analysis result shows that the structural strength of the clamping mechanism is excellent,which can meet the requirements of the use of automatic drilling rig.