=2.88×0.98×0.97 =2.74(KW)卷筒轴:=·=··=2.74×0.98×0.99=2.66(KW)计算各轴的输入转矩:电动机轴输出转矩为:=9550·/nm=9550×3/960=29.84N·mⅠ轴:=··=··=29.84×2.8×0.96=80.21N·mⅡ轴:=··=···=80.21×4.14×0.98×0.99=322.17N·m卷筒轴输入轴转矩:=··=312.57N·m轴号功率P/kWN/(r.min-1)/(N﹒m)i电动轴3.096029.842.80.96Ⅰ轴2.8342.8680.21Ⅱ轴2.7482.82322.174.140.95卷筒轴2.6682.82312.5710.97第五章V带的设计5.1选择普通V带型号由PC=KA·P=1.1×3=3.3(KW)取A型V带确定带轮的基准直径,并验算带速:则取小带轮d1=100mm?d2=i·d1=2.8×100=280mm由表取d2=280mm5.2带速验算V=n1·d1·π/(1000×60)=960×100·π/(1000×60)=5.024m/s介于5~25m/s范围内,故合适确定带长和中心距a:0.7·(d1+d2)≤a0≤2·(d1+d2)0.7×(100+280)≤a0≤2×(100+280)266≤a0≤760初定中心距a0=500,则带长为L0=2·a0+π·(d1+d2)+(d2-d1)2/(4·a0)=2×500+π·(100+280)/2+(280-100)2/(4×500)=1612.8mm由表选用Ld=1400mm的实际中心距a=a0+(Ld-L0)/2=500+(1400-1612.8)/2=393.6mm5.3验算小带轮上的包角α1α1=180-(d2-d1)×57.3/a=180-(280-100)×57.3/393.6=153.8>90合适确定带的根数
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