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回转支承
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Slewing Ring
Gyro turntable
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Double-row different diameters ball slewing ring
双排异径球式回转支承有三个座圈,根据受力状况,分布上下两排直径不同的钢球。上下圆弧滚道的承载角都为90度,能承受很大的轴向力和倾覆力矩。当径向力大于0.1倍的轴向力时轴向力时滚道须特殊设计。缺点是两排钢球独自受力,材料利用率低,加工成本高。
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