水平定向扩孔器破岩切削力矩仿真研究  

Simulation Research on Rock-breaking Cutting Torque of Horizontally Oriented Reamer

作　　者：葛昭文 燕翌 张戈 李云[1] GE Zhao-wen;YAN Yi;ZHANG Ge;LI Yun(College of Chemical Engineering and Technology,Xi’an Jiaotong University;College of Mechanics,Civil Engineering and Architecture,Northwestern Polytechnical University;Sinopec Zhongyuan Oil Construction Engineering Co.,Ltd.)

机构地区：[1]西安交通大学化学工程与技术学院 [2]西北工业大学力学与土木建筑学院 [3]中石化中原油建工程有限公司

出　　处：《化工机械》2022年第6期954-961,共8页Chemical Engineering & Machinery

基　　金：中石化石油工程建设有限公司项目(SJ19-8T)。

摘　　要：由于脆性岩土的破碎机制复杂,使水平定向扩孔器的切削过程和切削阻力复杂多变,给扩孔器的工艺参数选取带来了困难。其中扩孔器切削力矩的传统理论计算大都未考虑岩体破碎过程的阻力波动变化,导致功率偏大、切削效率偏低。在考虑岩体的破碎特征的基础上,建立扩孔器-岩土切削作用模型,利用Abaqus有限元分析软件对扩孔器切削过程进行数值仿真,得到了扩孔器在砂岩、炭质灰岩下的切削力矩,并进行了验证。进一步分析了扩孔器结构对切削力矩的影响。研究结果表明:岩土脆性越高,扩孔器所需切削力矩越小,切削效率越高;随牙轮倾角的增大,扩孔器所需切削力矩增大,牙轮安装难度提高;增加牙轮切削齿齿深能够提高切削速度,但也会增大切削力矩。The complicated fracture mechanism of brittle rocks troubles cutting torque of the reamer,and makes cutting resistance complex and bothers selection of the reamer’s technological parameters.The resistance fluctuation in rock mass crushing can lead to high power and low cutting efficiency.Based on the brittle fracture characteristics of rocks,the reamer-rock cutting process was modeled and the finite element analysis was adopted to analyze the stress state in the reamer,including having the dynamic cutting torque of reamer under sandstone and charcoal limestone numerically obtained and the results verified by the comparison with empirical formula,as well as having the influence of reamer structure on cutting moment further analyzed.The results show that,the higher soil brittleness asks for smaller cutting torque of the reamer and contributes higher cutting efficiency;as the inclination angle of the cone increases,the cutting torque required by the reamer rises,and the difficulty of installing the cone increases;increasing the depth of the cone cutting teeth can raise the cutting speed while also increasing the cutting torque.

关 键 词：扩孔器 岩体 有限元仿真 切削力矩 结构优化 

分 类 号：TD41[矿业工程—矿山机电]