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[单选题]
二号线转向架轮径值为810mm,则需要在两空簧安装座上分别加()垫片。
A.A型调整垫,12mm
B.A型调整垫,24mm
C.B型调整垫,12mm
D.B型调整垫,24mm
查看答案
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A.A型调整垫,12mm
B.A型调整垫,24mm
C.B型调整垫,12mm
D.B型调整垫,24mm
A.0.5mm,2mm,5mm
B.1mm,3mm,5mm
C.1mm,2mm,4mm
D.0.5mm,2mm,4mm
某传动轴,转速n =300 r /min,轮1为主动轮,输入功率P1 =50 kW,轮2、轮3与轮4为从动轮,输出功率分别为P2 =10 kW, P3 =P 4 =20 kW。 (1) 试画轴的扭矩图,并求轴的最大扭矩; (2) 若许用切应力 [τ ] = 80 MPa,试确定轴径d; (3) 若将轮1与轮3的位置对调,轴的最大扭矩为何值?对轴的受力是否有利?