| 回转支承，是一种能够承受综合载荷的大型轴承，可以同时承受较大的轴向、径向负荷和倾覆力矩。回转支承轴承一般带有安装孔、内齿轮或外齿轮、润滑油孔和密封装置，因而能使主机设计结构紧凑，引导简便，维护容易。
回转支承应用广泛，工程机械是回转支承最初应用也是应用最广泛的地方，如土方机械、挖掘机、解体机、堆取料机、平地机、压路机、强夯机、凿岩机械、掘进机等
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