Р基本参数Р电梯曳引包角α=180°=3.1415(rad)Р曳引轮绳槽型(半圆槽类型)Рγ=30°=0.52(rad) β=95°=1.66(rad)Р忽略顶层的曳引绳重量﹑曳引轮和滑轮的惯量。Р轿厢装载工况: T1/T2≤e fαР (1) ∵摩擦系数μ=0.1Р Р则当量摩擦系数有Р4(cosРγР-sinРβР)Рf=μР2Р2Рπ-β-γ-sinβ+sinγР4(cosР30°Р -sinР 95°Р)Рf=μР2Р2Р3.1415-1.66-0.52-sin95°+sin30 °Рf=0.1×1.97=0.197Р∴e fα= e 0.197×3.1415=1.86Р (2) 装载工况Р25倍的载重量,轿厢位于最低层时的静态比值:РT1Р=Р(G+125% Q+ G1)g÷i1РT2Р(W+G2) g÷i1РT1Р=Р(3500+1.25×5000+ 50.706)g÷2Р=1.696<e fα=1.86РT2Р(5750+29.925) g÷2Р满足条件Р(3)轿厢位于最高层站时的静态比值:РT1Р=Р(W+ G1)g÷i1РT2Р(G+G3+G2) g÷i1РT1Р=Р(5750+ 50.706)g÷2Р=1.641<e fα=1.86РT2Р(3500+2.925+29.925)g÷2Р满足条件Р3.轿厢紧急制动工况: T1/T2≤e fαР与轿厢额定速度相应的钢丝绳速度Vc=1.0m/s:减速度数值取a=0.5m/sР(1) ∵摩擦系数Рμ=Р0.1Р=Р0.1Р=0.091Р1+Vc/10Р1+1.0/10Р则当量摩擦系数有Рf1=μ1(f/μ)=0.091×(0.197/0.1)=0.179Р∴e f1α= e 0.179×3.1415=1.75Р(2)轿厢载有额定载荷位于上行最高层站急停时的动态比值:РT1Р=Р(G+ Q+G1 )(g+α)÷i1
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