传递功率P0.25小链轮转速n1131传动比i=2通常i≤7;推荐i=2~3.5;当V<2m/s且载荷平稳时,i可达10小链轮齿数z1(取奇数17)1725Zmin=17优先选用齿数17,19,21,23,25,38,57,76,95,114大链轮齿数z2(取奇数114)34z2大时,节距(或总长)磨损伸长率许用值(△p/p)减少,链传动的磨损寿命降低,且传动尺寸大。张紧链轮齿数zi≈17张紧链抡的布置应根据具体结构情况确定,一般推荐配置在链条松边靠近小链轮处,且在链边的外侧,以增加小链轮的包角。张紧链轮至少应有3个齿与链条啮合。小链轮齿数系数Kz0.887齿数9=0.446,10=0.5,11=0.554,12=0.609,13=0.664,14=0.719,15=0.775,16=0.831,17=0.887,18=0.943,19=1,20=1.06,21=1.11,22=1.17,23=1.23,24=1.29,25=1.34链条排数m1多排链排数系数Km1工况系数KA1设计功率Pd0.281848929链条节距选用p12.7根据设计功率Pd和小链轮转速n1。根据《机械零件设计手册》P577选用合适的节距p。注:为使传动平稳、结构紧凑,特别在高速下,宜选用节距较小的链条,速度高、功率大时,可选用较小的多排链。选用多排链时应注意传动对脏污和误差是比较敏感的。验算小链轮轮觳孔径dk≤dkmax93dkmax查《机械零件设计手册》P580大轮孔径dk230初定中心距a0(一般取a0max)1000a0max=35*p1219.2a0min=129.54可保持小链轮上的包角不小于120°,且大小链轮不会相碰。系数c17.320455518a0p(以节数表示的中心距初定值)78.74015748链长节数Lp(圆整取偶数)184183.073285链条长度L(m)2.3368系数c2158.5理论中心距a1005.888098△a3.017664293实际中心距a'1003链速v(m/s)0.471381667有效圆周力Ft530.355798作用于轴上的拉力FQ556.8735879润滑方式(P581)小轮z1大轮z2链号pdr链轮齿数173405B85节距p12.712.706B9.5256.35滚子外径dr7.927.9208A12.77.92排距pt14.3814.3808B12.78.51小轮孔径dk14010A15.87510.16大轮孔径dk23010B15.87510.16链轮分度圆直径d69.11582763137.641983齿顶圆直径da190360注:可在damax与damin之间选一值,但当选damax时,应注意用展成法加工时有可能发生顶切。damax=77.07082763145.596983damin=72.70053351141.824336齿型按3RGBT1244-1985齿根圆直径df61.19582763129.721983分度圆弦齿厚hamax4.5751470594.27632353滚子链传动的设计计算滚子链链轮的基本参数和主要尺寸分度圆弦齿厚hamin2.392.39最大齿根距离Lx(奇数齿)60.90099169129.575116最大齿根距离Lx(偶数齿)61.19582763129.721983内链板高度h12.0712.07齿侧凸缘(或排间槽)直径dg55124dgp*COT(180°/z)-1.04*h-7.0654.62619932123.742027常数K4.86.4轮觳厚度h2113轮觳长度Lmax6943轮觳长度Lmin5534轮觳直径dh(dhdg)13556内链板节内宽b17.857.85单排bf17.45757.4575双排三排bf17.30057.3005齿侧倒角ba(用于081,083,084)0.762其余型号ba1.651齿侧半径rz12.7验算小轮包角α1176.0739443小轮不发生胶合的极限转速n1max7870.297998量柱测量距MR(偶数齿)77.03582763145.561983量柱测量距MR(奇数齿)76.74099169145.415116量柱直径Dr(上差为:0.01下差为:0)7.92齿根圆极限偏差(上偏差为:0)下差:-0.25-0.3链轮孔和根圆之间的径向圆跳动需小于:0.150.18377759轴孔到链轮齿侧平直部分的端面圆跳动需小于:0.1350762450.19674979ri34.7807033869.2150966通常i≤7;推荐i=2~3.5;当V<2m/s且载荷平稳时,i可达10优先选用齿数17,19,21,23,25,38,57,76,95,114z2大时,节距(或总长)磨损伸长率许用值(△p/p)减少,链传动的磨损寿命降低,且传动尺寸大。张紧链抡的布置应根据具体结构情况确定,一般推荐配置在链条松边靠近小链轮处,且在链边的外侧,以增加小链轮的包角。张紧链轮至少应有3个齿与链条啮合。齿数9=0.446,10=0.5,11=0.554,12=0.609,13=0.664,14=0.719,15=0.775,16=0.831,17=0.887,18=0.943,19=1,20=1.06,21=1.11,22=1.17,23=1.23,24=1.29,25=1.34根据设计功率Pd和小链轮转速n1。根据《机械零件设计手册》P577选用合适的节距p。注:为使传动平稳、结构紧凑,特别在高速下,宜选用节距较小的链条,速度高、功率大时,可选用较小的多排链。选用多排链时应注意传动对脏污和误差是比较敏感的。可保持小链轮上的包角不小于120°,且大小链轮不会相碰。b1hpt37.115.645.728.2610.247.8512.0714.387.7511.8113.929.415.0918.119.6514.7316.59注:可在damax与damin之间选一值,但当选damax时,应注意用展成法加工时有可能发生顶切。3RGBT1244-1985平稳载荷1中等冲击严重冲击水平传动和倾斜传动2接近垂直的传动