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  Calculation For Slewing Ring
     AddTime:2008-7-9
 

一、Calculation for single-row ball slewing ring
1、Capacity of slewing ring
 C0 = f ·D·d
 In Equality:Co ——Capacity of bearing ,N
        f ——Capacity factor ,110 N / mm2
        D ——Diameter of track center ,mm
        d ——Diameter of ball ,mm
2、Loading calculation
  Cp = P + 4370 M/D + 3.44 Fr
  In Equality:Cp ——Loading caculation , kN
        M ——Toppling movement ,kN·m
        Fa ——Axial force ,kN
        Fr ——Radial force ,kN
3、Safety factor calculation
  fs = Co / Cp
   fs see the following table。
二、 Calculation for 3-row-roller slewing ring bearing
1、Capacity of slewing ring
  C0 = f ·D·d
  In Equality:Co ——Capacity of bearing ,N
        f ——Capacity factor ,147N / mm2
        D ——Diameter of track center,mm
        d ——Upper row roller diameter,mm
2、Loading caculation
   Cp = P + 4500 M/D
    In Equality:Cp ——Loading caculation,kN
        M ——Toppling movement ,kN·m
        Fa ——Axial force,kN
3、Safety factor calculation
  fs = Co / Cp
  fs see the following table 。
  Slewing ring safety factor fs

 
 

 
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