已知:一对7308AC轴承安装于轴上(采用正装),已知:Fr1= 1200 N,Fr2 = 2060 N ,轴向外载荷FA = 880 N ,轴承的参数如下:附加轴向力Fs =0.68 Fr;e = 0.68;Fa/Fr ≤e,X= 1,Y= 0;Fa/Fr > e,X = 0.41,Y= 0.87;冲击载荷系数fd = 1.0,试计算轴承的当量动载荷P,判断危险轴承。https://bgk-photo.cdn.bcebos.com/f9dcd100baa1cd1134c12841a912c8fcc3ce2d5f.jpg
已知:一对7308AC轴承安装于轴上(采用正装),已知:Fr1= 1200 N,Fr2 = 2060 N ,轴向外载荷FA = 880 N ,轴承的参数如下:附加轴向力Fs =0.68 Fr;e = 0.68;Fa/Fr ≤e,X= 1,Y= 0;Fa/Fr > e,X = 0.41,Y= 0.87;冲击载荷系数fd = 1.0,试计算轴承的当量动载荷P,判断危险轴承。https://bgk-photo.cdn.bcebos.com/f9dcd100baa1cd1134c12841a912c8fcc3ce2d5f.jpg
发布时间：2024-06-13 16:42:18
Fs1=0.68Fr1=0.68×1200=816NFs2=0.68Fr2=0.68×2060=1400.8 N∵Fs2 FA=1400.8 880=2280.8> Fs1∴ 轴承1压紧,轴承2放松Fa1=Fs2 FA=2280.8 NFa2=Fs2=1400.8 NFa1/Fr1=2280.8/1200=1.90>0.68,所以,X1=0.41 Y1=0.87Fa2/Fr2=1400.8/2060=0.68=e, 所以,X2= 1 Y2=0P1= fd ( X1 Fr1 Y1 Fa1)=1×(0.41×1200 0.87×2280.8)=2476.3NP2= fd (X2 Fr2 Y2 Fa2)=1×(1×2060 0)=2060N因P2
