自动门
自动门:中心轴受力中心
发布时间:2013/2/4

 成都自动门讯:

  (1)中心轴强度校核。

    三/四翼旋转门从驱动装置到旋转组件主要受力零件和部件为中心轴、展箱框架和连
图4. 16  三/四翼旋转门旋转中心主轴受力图
接柱组件和下支撑轴,从结构图可知中心轴截
面尺寸最小、受力大,因此只进行中心轴K-
K截面的强度校核。图4.  16给出了中心轴受
力简化图。
    (2)中心轴K-K截面的作用力和力矩。
    ”中心轴扭矩M-o在已选定减速电机
条件下已知:
    a.减速电机功率Po,kW。
    b.减速电机输出轴输出扭矩Mj,N-m。
    c·减速电机输出轴的转速力..r/min。
    d.减速电机总效率协。
    从式(3.1 6)可求得中心轴功率Pw,根
据式(3.55),可求得中心轴的转速为n_o
    因为三、四翼申心轴采用的链轮传动,因
此式(3.55)中的速比应根据式(4.19)求
得。最后由式(3.33)可求得中心轴的扭
矩M,,。
    2)中心轴径向力FR。
    FR =KA塑OOPN(N)
    可
式中  KA——工作情况系数.K^=1.2-1.3,
    PN -输出功率.kWI
    犷一链速,m/s。
    五刀.j
    链速    秒=丽又而蒜  ( m/s)
式中  Zl -小链轮齿数,z1-18;
    砚-——小链轮转速.l/mini
    P-链轮节距,mm,P-12.7。
    3)中心轴K-K面上的弯矩ArIF。
    MF=FRh3  (N.m)
式中  h3-径向力F3与中心轴K-K面的距离,m。
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