自动门
自动门:环柱自动旋转门的阻力矩计算
发布时间:2013/5/1
环柱自动旋转门的阻力矩计算
    环柱旋转门旋转时要克服的阻力矩包括摩擦阻力
矩、风阻力矩、旋转惯性阻力矩和坡道阻力矩。
    环柱旋转门旋转时要克服的旋转阻力矩按式
(3.38)计算。
    (1)摩擦阻力矩M二。    图5- 18环柱旋转门支座受力图
    砒fm =MK+M^+MB  (N.m)    (5.12)
武中MK一一上旋转轨环柱轮摩擦阻力矩,N.m;
    MA-上旋转轨辅轮摩擦阻力矩.N.m;
    MB——下旋转轨辅轮摩擦阻力矩,N-m。
    1)上旋转轨环柱轮摩擦阻力矩MK。
    上环柱轮阻力按式(3.43)计算。公式中的D为环柱轮直径。
    因此上旋转轨环柱轮摩擦阻力矩MK按式(3.44)计算。公式中的D.为旋转轨直径。
    2)上旋转轨辅轮摩擦阻力矩MA
    MA=FA(∥L萼+,)(N.m)    (5.1 3)
式中  FA -上旋转轨辅轮径向力,N;
    户..一一滚动轴承摩擦系数,见表3.8 5
    d-滚动轴承内径,mm;
    ,“一-滚动摩擦杠杆臂,mm,见表3.10。
    因为辅轮无轮缘,因此轮缘摩擦附加系数C-O,上式中未考虑轮缘摩擦附加系
数C。
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