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对运行在神朔线上的SS4B和SS4改电力机车进行现场检修过程中发现机车轮对经常会出现偏磨严重现象,初步分析同一轮对左右轮的轮径差是造成其偏磨严重的重要原因。对具有轮径差的轮对进行平衡位置分析,并以SS4型机车为例,利用SIMPACK软件建立机车系统动力学模型,计算轮径差对轮对横移量、冲角、蠕滑率和蠕滑力的影响,最后分析同一轴左、右轮的磨耗功率。计算结果表明:当同一轴的车轮具有轮径差时,车轴会产生横移量和冲角以达到受力平衡,轮径差越大,横移量和冲角越大;轮径差是车轮出现偏磨的重要原因,轮径差越大,左、右轮的磨耗功率相差越大,即偏磨越严重。
During the on-site overhaul of SS4B and SS4 modified electric locomotive running on the ShenShuo line, it is found that locomotive wheelsets often appear partial eccentric wear seriously. The primary analysis of the same round of wheel diameter difference caused by the left and right wheels is important for partial eccentric wear the reason. The equilibrium position of wheelsets with wheel diameter difference is analyzed. Taking SS4 locomotive as an example, the dynamic model of locomotive system is established by using SIMPACK software to calculate wheelset traverse displacement, angle of attack, creep rate and creep Sliding force, the final analysis of the same axis left and right wheel wear power. The calculation results show that when the wheel with the same shaft has the wheel diameter difference, the axle will produce the transverse displacement and the angle of attack to achieve the force balance. The larger the wheel diameter difference is, the larger the horizontal displacement and the angle of attack are. The wheel diameter difference is the wheel Appear eccentric wear an important reason, the greater the wheel diameter difference, the left and right wheel wear power greater the difference, that is more serious partial wear.