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广东技术师范学院天河学院机械设计课程设计题目_________________________姓名_________________________学号_________________________专业_________________________指导老师_________________________日期_________________________机电工程系二零一一年四月机械课程设计说明书机电工程系机械教研室,本资料供学生参考用2《机械设计》课程设计任务书一、设计题目带式运输机传动系统中的展开式二级圆柱齿轮减速器二、系统简图三、工作条件及设计要求该机室内工作,连续单向运转,工作时有轻微振动,两班制。要求使用期限十年。输送带速度允许误差5%。在中小型机械厂小批量生产。已知条件题号123456输送带拉力F(N)1.6×1031.8×1032×1032.2×1032.4×1032.6×103输送带速度v(m/s)2.42.42.11.81.61.6滚筒直径D(mm)400400400400450450四、设计工作量1.减速器装配图1张(A1)。2.减速器主要零件图两张,其中一张齿轮,一张轴(A3)。3.设计说明书1份,4000~6000字。机械课程设计说明书机电工程系机械教研室,本资料供学生参考用3要求:(1)16开纸手写,要求字迹工整,清洁。(2)封面统一打印。(3)正文中各数据由何表格获得均可写出。机电工程系2011-4-26-11-15机械课程设计说明书机电工程系机械教研室,本资料供学生参考用4目录机械设计任务书机械课程设计任务书·······················································································3机械课程设计第一阶段1.1确定传动方案··························································································41.2电动机选择·······························································································41.3、传动件的设计·························································································8机械课程设计第二阶段2.1装配草图设计第一阶段说明······································································162.2轴的设计及校核························································································162.3轴承的设计及校验······················································································212.4键的设计及校验·························································································22机械课程设计第三阶段3.1、轴与齿轮的关························································································233.2、端盖设计································································································233.3、箱体尺寸的设计······················································································263.4、齿轮和轴承的润滑····················································································27机械课程设计小结4.1机械课程设计小结····················································································28附1:参考文献机械课程设计说明书机电工程系机械教研室,本资料供学生参考用5课程设计第一阶段2.1确定传动方案(1)、传动方案:方案:电动机直接通过带传动接在两级圆柱齿轮减速器上,该方案的优点是圆柱齿轮的设计、加工制造容易,采用卧式两级圆柱齿轮减速器。(2)、减速器内部工作方式:展开式直齿啮合。(3)、减速器的总传动比为32.29,其中带传动为2,高速级与低速级为3。减速器传动比范围为860i。(4)、部分面形式:水平剖分面形式。(5)、轴承类型:圆锥滚子轴承。(6)、联轴器类型:HL系列其中电动机和输入轴之间采用弹性套柱销联轴器HL1-J;工作机构和输出轴之间采用HL3-J1。2.2电动机的选择1、电动机的输出功率的计算已知工作机的阻力F和速度v,则工作机输入功率P:/1000PFv式中F=5.33kN=5330N,v=0.7m/s,1.弹性套柱销联轴器(两个):η12=0.9922.滚筒:η2=0.963.3对滚子轴承:η33=0.9834.V带传动:η4=0.965.2对8级圆柱齿轮传动:η52=0.98223212345。=0.82机械课程设计说明书机电工程系机械教研室,本资料供学生参考用6查表9-1得:(由电动机至工作机的输入端)弹性连轴器效率1=0.99,滚动轴承效率2=0.99,闭式圆柱齿轮啮合效率3=0.97(按8级精度)。把上述值代入后得:253300.710000.990.82P=4.55kW2、电动机的输入功率P的计算:本题中起动系数1.2dk,故1.24.55dPkP查表16-2得,Y系列1500r/min电动机的具体牌号为:Y132S4-2-B3型额定功率为:5.5kW堵转转矩/额定转矩:2.2最大转矩/额定转矩:2.23、计算总传动比并确定传动比1)、计算总传动比i在上面已经确定了电机满载转速为dn=1440r/min,利用公式5.6计算工作机的转速,并取i车=1.87:61000/6010000.7/(3.14300)/mingnvDr传动装置的总传动比i为dgnin1440/44.592)、传动比的分配01iii总取带传动比为0i=21223iii1而设高速级与低速级传动比相等,即:1223ii,得P=5.44KWgn=81.68i32.2912i4.02机械课程设计说明书机电工程系机械教研室,本资料供学生参考用712231iii4、传动装置运动参数的计算1)、各个参数说明:1n、2n、3n——I、II、III轴的转速(/minr)1P、2P、3P——I、II、III轴的输入功率(kW)1T、2T、3T——I、II、III轴的输入转矩(Nm)oP——电动机实际输出功率(kW)mn——电动机满载转(/minr)2)、各个轴转速的计算:1g0/1440/2720nni/minr2112/720/4.02179.10nni/minr3223/179.10/4.0244.55nni/minr3)、各个轴功率的计算:1345.440.960.985.12PPkW21355.170.980.984.92PPkW32354.920.980.984.72PPkW4)、各个轴扭矩的计算1119550/95505.12/72067.91TPnNm2229550/95504.92/179.10262.35TPnNm3339550/95504.72/44.551011.81TPnNm将以上数据列表如下:轴号转速n功率P输出转矩T传动比i效率电机轴14405.4420.95轴114405.1267.914.020.97轴2179.104.92262.354.020.97轴344.554.721011.8110.9723i4.021960n/minr2245.15/minnr382.05/minnr12.212PkW22.124PkW32.040PkW122TNm282.40TNm3237.44TNm机械课程设计说明书机电工程系机械教研室,本资料供学生参考用8车轮轴44.551.9581011.81注:其中传动比和效率为上下相邻两格参数内的,如“传动比1,指的是电机轴和轴1之间的传动比为1”2.3、传动件的设计1、V带的设计1)确定V带型号工作情况系数KA查表4-6计算功率Pc由Pc=KAP=1.2x5.44V带型号根据Pc和n1值查图4.62)确定带轮基准直径D1和D2小带轮直径D1查表4.7大带轮直径D2D2=(n1/n2)·D1=1440/720x100=200mm按表4.7圆整3)验算带速vv=π·D1·n1/60000=πx100x1440/6000要求V带速在5~25m/s范围内4)确定V带长度Ld和中心距a按0.7(D1+D2)≤a0≤2(D1+D2)初选a0a0=600mm,初算带基准长度L’L’=2a0+221DD+02214aDD=2x600+2200100+22001004600=1675mm按表4.3圆整a≈a0+2LLd=500+(1800-1675)/25)验证小带轮包角11=180°-(200-100)/662x57.3°KA=1.2Pc=6.53kwA型D1=100mmD2=200mmV=7.54m/s带速符合要求Ld=1800mma=662mm机械课程设计说明书机电工程系机械教研室,本资料供学生参考用96)确定V带根数单根V带试验条件下许用功率P0查表4.4传递功率增量⊿P0查表4.5(i=200/100=2)包角系数Ka查表4.8长度系数KL查表4.3z=La00KKPPCP=6.531.320.170.981.01=4.437)计算初拉力F0F0=215.2500qvKzvPaC=25006.532.510.17.5457.540.98=140.4N8)计算轴压力QQ=2·z·F0·)2sin(1=2x5x140.4x171.3sin()2=1399.6N2、齿轮的设计1、传动件的设计说明1)、闭式传动采用软齿面HBS3502)、齿轮的结构与齿轮的尺寸有关。齿轮的材料是根据齿轮尺寸决定的,尺寸小时采用锻钢(40、45钢);尺寸大时(如圆柱齿轮d500mm)时,由于受到锻造设备能力的限制,采用铸钢。当毛坯的制造方法不同时,齿轮的结构也不同,也就是齿轮结构必须与毛坯的制造方法相1=171.3°120°P0=1.32⊿P0=0.17Ka=0.98KL=1.01Z=4.43F0=140.4Q=1399.6机械课程设计说明书机电工程系机械教研室,本资料供学生参考用10适应。故不同的尺寸的齿轮要视其材料而决定结构。3)、圆柱齿轮在强度计算中得到的齿宽应作为大齿轮齿宽,而小齿轮宽度应该取得大一些。一般(5~10)mmbb小大,以补偿轴安装误差,保证足够的齿宽接触。4)、齿轮传动的参数及尺寸分别进行标准化
本文标题:5减速器课程设计说明书--供写说明书时参考
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