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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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