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fa dong ji zhou wa yi chang sun huai fen xi ji wei xiu
Author(s): 
Pages: 71
Year: Issue:  8
Journal: Farm Machinery Using & Maintenance

Abstract: 发动机上的滑动轴承通常分为两种:一种是衬瓦式薄壁轴承,形似瓦片俗称轴瓦;另一种是衬套,又称铜套,形状为空心圆柱体.轴瓦主要用于支承曲轴的主轴瓦和支承连杆的连杆轴瓦.衬套主要用于支承凸轮轴轴颈及活塞销.滑动轴承与被支承的轴颈之间的滑转速度较高,轴瓦与转轴之间要求有一层很薄的油膜起润滑作用,尽管在设计和生产时力求实现轴承的良好润滑,但实际上很难保证.轴瓦与轴颈之间常是半液体、半干性摩擦,所以在缺油时轴瓦磨损严重.当磨损超过所允许的间隙值时,就应停车修理.否则,温度升高会使轴瓦表面的合金熔化,损伤轴颈,造成事故停车.轴瓦还可能由于负荷过大、温度过高、润滑油存在杂质或黏度异常等因素造成烧瓦.
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