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全自动动平衡校正机设计.doc

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全自动动平衡校正机设计.doc

黄河科技学院毕业设计(论文)第I页全自动动平衡校正机设计摘要电机在设计、选材、制造、装配等过程中不可避免的存在各种误差,这些误差会造成电机中转子的质心与旋转中心不一致。这样电机在高速运转时就会产生振动,引起噪声,影响机器运转,减少使用寿命。因此必须对电机中的转子进行动平衡。本文综合考虑国内外自动化程度不同的各型平衡机优缺点,开发出一种可用于中小型电机转子动平衡的R型铣削校正方式双工位全自动平衡机。系统结构采用模块化设计思想,多线程协调统筹动作,信号动作状态线图进行程序流程及时序分析,具有结构分立及合并方便,生产节拍精简,运行可靠,高校正精度等特点。为保证系统平衡精度,本文在多有文献论述的测量系统精度控制的研究基础上,重点对铣削校正系统的精度控制进行目标分析和提出应用方案。文章首先详细分析各因素对平衡校正精度的相对重要性和控制难度,包括R型铣槽动不平衡量的多因素影响、相位误差因素影响、校正平面位置偏差因素影响等,得出侧吃刀量分散度和铣刀刀尖过渡刃长度尺寸公差是转子R型铣削校正精度控制的主要因素,并且相位误差及校正平面位置偏差也是重要目标。关键词动平衡,全自动平衡机,铣削用量黄河科技学院毕业设计(论文)第II页AutomaticdynamicbalancecorrectionmachinedesignAuthorLiZhengTutorYunKangAbstractBecauseoftheinevitableerrorsinthedesign,thematerialselection,themanufactureandtheassembleprocessofthemotorgenerally,themasscenterofthemotorrotorwilldeviatefromtherotatingcenter.Whenthemotoroperatesatahighspeedthevibrationandthenoisewillbegenerated.Thevibrationisharmfulbecauseitwillinfluencetheoperationandshortenthelifeofthemotor.Itisnecessarytobalanceeachmotorrotor.Thisthesiscomprehensivelyconsideredrelativemeritsofdiversiformbalancingmachinesofdifferentautomaticlevelathomeandabroad,anddevelopedonedoubleworkingpositiontypeofautomateddynamicbalancing,whichappliestomicromidielectricmachinerotorsRmillingbalancecorrection.Toassuresystemaccuracy,thewriterfocusesontheaccuracyanalysisofbalancingcorrectionsystemandpropositionofresolutionmethods,foundedontheaccuracycontrolofbalancemeasurementsystemwhichhasbeendiscussedinnumerousliteratures.Firstly,relativeimportanceandcontroldifficultiesofvariousfactorswhichimpactoncorrectionaccuracyareanalyzedindetail.Theworkreachesresultsthatdepthdispersionofsidecutandchamferedcornerlengthtoleranceofmillingcuttertoolnosearethemainfactors,aswellasphaseerrorandplacedeviationofcorrectionplane.KeywordsDynamicBalancing,AutomatedBalancingMachine,MillingDosa黄河科技学院毕业设计(论文)第III页目录1绪论....................................................................................................................................11.1课题背景及目的...............................................................................................................11.2国内外研究状况...............................................................................................................11.3课题研究内容及要求.......................................................................................................32转子的动平衡原理..............................................................................................................42.1转子产生不平衡的原因及其危害...................................................................................42.2不平衡的种类...................................................................................................................62.2.1静不平衡....................................................................................................................62.2.2力偶不平衡................................................................................................................62.2.3动不平衡....................................................................................................................62.2.4准静不平衡................................................................................................................72.3刚性转子的动平衡原理...................................................................................................72.4挠性转子的动平衡原理...................................................................................................82.5校正理论研究...................................................................................................................92.5.1全自动平衡机系统的组成........................................................................................92.5.2全自动平衡机系统的控制流程.............................................................................102.5.3R型铣削模型.........................................................................................................113全自动动平衡机的系统构架............................................................................................133.1平衡机的分类.................................................................................................................133.2系统构架.........................................................................................................................143.2.1平衡机......................................................................................................................143.2.2去重机......................................................................................................................153.2.3控制系统..................................................................................................................154全自动动平衡机的机械结构设计....................................................................................164.1平衡机的传动.................................................................................................................164.2平衡机驱动方式.............................................................................................................164.3平衡机的支撑方式.........................................................................................................174.4伺服电机的选择与校核.................................................................................................174.5主轴的结构设计..........................................................................................................194.6轴承的选择.................................................................................................................205全自动动平衡机的测量理论研究....................................................................................215.1测量原理.........................................................................................................................215.1.1直流分量..................................................................................................................225.1.2基波分量..................................................................................................................235.1.3谐波分量..................................................................................................................24黄河科技学院毕业设计(论文)第IV页5.1.4异频分量和噪声......................................................................................................245.2动不平衡量的测量数学模型.........................................................................................255.3数字信号处理方法.........................................................................................................275.3.1干扰信号分类..........................................................................................................275.3.2不平衡量提取方法..................................................................................................285.3.3数字滤波方法..........................................................................................................296全自动动平衡机的测试系统设计....................................................................................386.1测量系统的组成.............................................................................................................386.2系统部分硬件.................................................................................................................396.2.1振动传感器..............................................................................................................396.2.2参考信号测量传感器..............................................................................................416.2.3电荷放大器..............................................................................................................436.2.4增益控制..................................................................................................................456.2.5中心频率跟踪的窄带滤波器设计..........................................................................456.2.6压电信号调理电路设计..........................................................................................516.2.7数据采集卡..............................................................................................................516.2.8程控放大电路的设计..............................................................................................527总结与展望........................................................................................................................54致谢....................................................................................................................................56参考文献..................................................................................................................................57

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