毕业设计(论文)-采煤机螺旋滚筒结构优化设计.docx
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1、完成日期:20XX年 5 月25 H本科毕业论文(设计)采煤机螺旋滚筒结构 优化设计学院:山 西大同 大学煤炭工程学院班级:机械三班姓名:指导教师:职称:教 授山西大同大学本 科生毕 业设计英文题目:中文题目:采煤机螺旋滚筒结构优化设计Screw drum of shearer structure optimized design学 院:煤炭工程学院姓 名:学号:专 业: 机械设计制造及其H动化班级:机械三班指导教师:职称:螺旋滚筒式采煤机是迄今为止综采面最重要的工作机器,滚筒作为滚筒式采煤机的关键机构和工作设备,其工作性能和生产效率决定采煤机功能。因此,建立了螺旋滚筒模型和刀齿模型,而且对螺
2、旋滚筒载荷的分析,还有对螺旋滚筒参数优化设计具有十分重要的意义。AbstractAt present,shearer is the uppermost work equipment in fully-mechanized coalworking face ,the screw drum is shearers pivotal part and working frameworkjtscapability stand or fall decide shearers work performance and production efficiency.so itis significant to
3、establish pick screw drums load model,simulate screw drums load, andoptimize design for parameters of the screw drum.With regard to this, the theoretical analysis, simulation and experiment arecombined to investigate the cutting performance shearer drum and dynamic characteristicof the cutting syste
4、m in this thsis . According to the shearer cutting theory, MathematicalModel for the coal characteristic , the drum, the pick and the cutting load are built. Theinfluence of the coal characteristic, pick structure parameters and drum structureparameters on the drum cutting torque, cutting specific c
5、onsumption and lump coalpercentage are investigated, and the relationship expression and variation laws areacquired.According to the experiment date and talking the wavelet theory as guidance .Regard MATLAB software as the platform , the detail wave of the load change and thechange trend of load alo
6、ng with the coal characteristic change are obtained. And theinfluence laws of the coal-rock interface form on the cutting system frequency areacquired , too.the load variation is described . Based on the built constitutive model ofcatastrophe and dynamic model , the cusp catastrophic model of the dr
7、um cutting coal isestablished,and the rigidity and energy conditions are acquired for the shearer cuttingprogramme. Analyzed the spectrum of simulated load in frequency field, time field andamplitude field ,studied loads desity of probability distribution, since(or mutual)relevance, since(or mutual)
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