铁钻工上卸扣的最大主动扭矩分析

doi:10.11885/j.issn.1674-5086.2021.09.29.01

摘要/Abstract

摘要： 针对铁钻工在上卸扣过程中管柱被咬伤和剥皮现象，从管柱抵抗钳牙咬入、切削和摩擦的角度，建立了铁钻工能提供的最大主动扭矩与夹紧力之间关系的研究方法。首先，对钳牙咬入管柱的过程进行了弹塑性计算和损伤失效分析，获得钳牙咬入深度；然后，通过齿形摩擦块与摩擦环的摩擦实验确定钳牙与管柱材料之间的摩擦系数，并利用单齿切削管柱材料的三维有限元计算得到切削力，由摩擦力和切削力确定铁钻工能提供的最大主动扭矩；最后，研究了钳牙的牙型角、齿顶宽和齿尖倒角对上卸扣扭矩的影响。为优化钳牙结构和作业参数、改进铁钻工性能提供理论依mbox据。

关键词: 铁钻工, 牙板齿, 咬入深度, 金属切削, 最大主动扭矩

Abstract: Aiming at the biting and peeling phenomenon of pipe string in the process of makeup or breakout with iron roughnecks, a research method is established to describe relationships between the maximum active torque and the clamping force from aspects such as biting, cutting and friction between tong dies and pipe string. Firstly, elastoplastic calculation and damage failure analysis were carried out for the process of tong dies biting into the pipe string, and biting depths were obtained. Secondly, friction experiments between tooth-shaped friction blocks and friction rings, which was made with materials of tong dies and pipe strings respectively, were conducted to determine friction coefficients. Cutting forces were simulated by a three-dimensional finite element model of a single tooth cutting pipe steel, and maximum active torques were determined. Finally, influences of tooth shape parameters on the maximum active torque provided by the iron roughneck during makeup and breakout were analyzed. A theoretical basis is provided for optimizing both tong die structure and operating parameters and improving performances of iron roughnecks.

Key words: iron roughneck, tong die, biting depth, metal cutting, maximum active torque

中图分类号:

TE93

陆文红, 赵广慧, 李涛, 冯闯. 铁钻工上卸扣的最大主动扭矩分析[J]. 西南石油大学学报(自然科学版), 2024, 46(2): 176-186.

LU Wenhong, ZHAO Guanghui, LI Tao, FENG Chuang. An Analysis of the Maximum Torque Provided by Iron Roughnecks[J]. Journal of Southwest Petroleum University(Science & Technology Edition), 2024, 46(2): 176-186.

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