含夹矸煤岩截齿安装角对截割力的影响研究.pdfVIP免费

收稿日期:2023􀆼05􀆼06基金项目:国家自然科学基金资助项目(52204131);黑龙江省首批“揭榜挂帅”科技攻关项目(2021ZXJ02A01)作者简介:任春平(1987-),男,黑龙江肇东人,博士,从事矿山机械设计理论及方法工作。doi:10.3969/j.issn.1005-2798.2023.09.002含夹矸煤岩截齿安装角对截割力的影响研究任春平,张训洪,赵中旭(黑龙江科技大学机械工程学院,黑龙江哈尔滨150022)摘要:为研究含夹矸煤岩截齿安装角度对截割力影响,运用Pro/E构建镐型截齿和含夹矸煤岩的三维模型,采用ABAQUS有限元软件对截齿截割含夹矸煤岩动态过程进行数值模拟,分析不同截齿安装角度下的应力云图与载荷曲线。结果表明:截齿最大截割力出现在最大切削厚度处附近,改变截齿安装角度,对截齿截割力影响较小;随着截齿安装角的增大,截割力均值和截割力峰值均值呈现先减小后增大的趋势。随牵引速度增大,截齿截割力均值、截割力峰值均值呈增加趋势,该研究为调整截齿安装角来提高截齿破碎性能奠定基础。关键词:截齿;安装角;夹矸煤岩;数值模拟;截割力中图分类号:TD42文献标识码:A文章编号:1005􀆼2798(2023)09􀆼0006􀆼04StudyonInfluenceofPickInstallationAngleonCuttingForceinCoalRockContainingGangueRENChunping,ZHANGXunhong,ZHAOZhongxu(SchoolofMechanicalEngineering,HeilongjiangUniversityofScienceandTechnology,Harbin150022,China)Abstract:Inordertostudytheinfluenceofpickinstallationangleoncuttingforceincoalseamwithparting,Pro/Eisusedtoconstructthethree-dimensionalmodelofconicalpickandcoalrockwithparting.ABAQUSfiniteelementsoftwareisusedtosimulatethedynam-icprocessofpickcuttingcoalrockwithparting.Thestressclouddiagramandloadcurveunderdifferentpickinstallationanglesarean-alyzed,andtheinfluenceofdifferentinstallationanglesoncuttingforceisstudied.Theresultsshowthatthemaximumcuttingforceofthepickappearsnearthemaximumcuttingthickness.Changingtheinstallationangleofthepickhaslittleeffectonthecuttingforceofthepick.Withtheincreaseofpickinstallationangle,themeanvalueofcuttingforceandthemeanvalueofcuttingforcepeakdecreasefirstandthenincrease.Withtheincreaseoftractionspeed,themeanvalueofcuttingforcepeakandthecoalfallingmassperunittimeincrease.Thisstudylaysafoundationforadjustingtheinstallationangleofpickstoimpro...