The rake roller device in round-yard even-mixing stacker and reclaimer is used to support the claw and drive the claw to rake off materials.Due to the action of rake gravity and material resistance , the rake roller device places large stress on the rail.During design of the claw roller device , it's required to consider the positions of two sets of roller devices, increase the abrasion performance of roller contact surface , reduce the additive resistance to the roller , and set good lubricating system and structure easy to maintain.%圆形料场混匀堆取料机中的料耙滚轮装置支撑料耙并带动料耙耙落物料，由于料耙重力和物料阻力的作用，料耙滚轮装置对轨道压力很大，设计料耙滚轮装置时要考虑合理布置2组滚轮装置的位置，增加滚轮接触面的耐磨性，减小滚轮所受的附加阻力，设置良好的润滑系统及便于维修的结构。
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