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1滚子链传动设计计算步骤已知p=10KW,小链轮的转速n1=720r/min,传动比i=2.8,载荷平稳,两班工作制,两链轮中心距a=500~600mm范围,中心距可调,两轮中心连线与水平面夹角近于35o,小链轮孔径40mmdk。计算:(1)小链轮齿数z1z1=29-2i=29-2*2.8=23.4取整数z1=23i1~22~33~44~55~66z131~2727~2525~2323~2121~1717~15优先选用齿数:17,19,21,23,25,38,57,76,95,114z1、z2取奇数,则链条节数pL为偶数时,可使链条和链轮轮齿磨损均匀。在高速或有冲击载荷的情况下,小链轮齿最小应有25齿。(2)大链轮齿数z2Z2=iz1=2.8*23=64.4取整z2=65(3)实际传动比i=83.22365zzi12(4)设计功率PkpAdAk工况系数,查表5.4-31kA,10KWPkpAd(5)单排链条传递功率mZd0kkPP,查表5.4-4和5.4-5,齿数系数23.1kZ,排数系数mk=1123.110P0=8.13kw(6)链节距p根据13.8P0,n1=720r/min,查图5.4-1功率曲线0P和n1确定的点,应在所选型号链的功率曲线下方附近(不超过直线)。结果为10A,节距p=15.875mm,(7)验算小链轮轴直径kd查5.4-7链轮中心孔最大许用直径40mm65dkmax(8)初定中心距0ap)50~30(a0为优,无张紧轮时取25pa0i4≥40mina0.2z1(i+1)p0.33z1(i-1)p80pa0max6mm.555875.153535pa0(9)确定链条节数0212210pap)2zz(2zzp2aL235pp)22365(26523p35p22=115.3取116Lp(10)链条长度84m.11000875.151161000pLLp(11)计算(理论)中心距'a当21zz时,a21p'k)zz2L(pa当21zz时,)zL(2pap'根据2143.2236523116zzzL121p,查表5.4-9,若有必要可使用插值。24559.0ka42.56124559.0)65231162(875.15k)zz2L(paa21p'(12)实际中心距aaaa',一般'a)004.0~002.0(a559.74mm561.420.003-561.42aaa'(13)链速s/38m.4100060875.1572023100060pnzv11(14)有效圆周率1N.228338.4101000v1000PFt(15)作用在轴上的力F水平或倾斜的传动tAFK)2.1~15.1(F接近垂直的传动tAF05K.1FAK工况系数,见表5.4-3F=1.2×1×2283.1=2739.7N(16)润滑方式。(17)链条标记:10A-1-116GB1243-19971表示排数,116表示节数(18)链轮的几何尺寸滚子直径16mm.10d1p=15.875mm1)分度圆直径z180sinpdo小链轮585.11623180sin15.875do,大链轮584.32865180sin15.875do2)齿顶圆ad31amaxd25p.1dd,1amindp)z6.11(dd对于三圆弧-直线齿形)z180(tan154.0pd0a小链轮齿顶圆)23180(tan154.015.875d0a=124.072mm,取整124mm大链轮齿顶圆)65180(tan154.015.875d0a=336.773mm,取整337mm3)齿根圆直径1fddd小链轮齿根圆直径1fddd=116.585-10.16=106.425mm,取106.43mm大链轮齿根圆直径1fddd=328.584-10.16=318.424mm,取318.42mm4)节距多变形以上的齿高27p.0ha=0.27×15.875=4.286mm(对于三圆弧-直线齿形)5)最大齿根距xL奇数齿10xdz90dcosL偶数齿1fxdddL小链轮10.162390585cos.116L0x=106.153mm大链轮10.166590584cos.328L0x=318.328mm6)轴凸缘直径gd76.004h.1z180pcotd2og小链轮76.015.0904.12318015.875cotdog=99.045mm大链轮76.015.0904.16518015.875cotdog=311.746mm7)轮毂厚度h01d.06dKhk,kd——孔的直径d5050~100100~150150K3.24.86.49.5小链轮116.58501.06406.4h=14.232,取整14mm4大链轮584.32801.06609.5h=22.7858,取整数22mm8)轮毂长度ll=3.3h6h.2lmin小链轮l=3.3×14=46.2mm,取整46mm大链轮l=3.3×22=72.6mm,取整72mm9)轮毂直径2hddkh,ghmaxdd小链轮14240dh=68mm大链轮22260dh=104mm10)齿宽fb单排7.12p95b.07.12p93b.0b11f单排1f95b.0b=0.95×9.4=8.93mm11)齿侧半径prx20mmrx12)倒角宽13p.008508408308106p.0ba其它、、、链号0637.2875.1513.0ba,取2.1mm13)倒角深h=0.5p=0.5×15.875=7.9375mm14)齿侧凸缘圆角半径04p.0ra=0.635mm(19)链轮公差1)齿根圆直径和量柱测量距极限偏差项目极限偏差孔径kdH8齿顶圆adh11齿根圆直径fd极限偏差h11齿宽fbh14量柱测量距RM极限偏差h11项目符号计算公式量柱测量距偶数齿RM1RminRddddM奇数齿)d(dz90dcosM1RminoR小链轮齿根圆直径1fddd=116.585-10.16=106.425mm,取106.43mm大链轮齿根圆直径1fddd=328.584-10.16=318.424mm,取318.42mm500.220-106.43106.43h11,00.360-318.42318.42h11小链轮量柱测量距00.25-oR126.4747h11.12616.102390585cos.116M大链轮量柱测量距00.36-oR65.33865h11.33816.106590584cos.328M2)径向圆跳动小链轮径向圆跳动=min{0.0008df+0.008,0.76}=0.0008×106.43+0.008=0.093144端面跳动=min{0.0009df+0.008,1.14}
本文标题:链轮设计步骤
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