浮动密封广泛应用于履带式工程机械的行走机构,也用于直接和恶劣环境接触的减速箱输出轴。长期实践证明,在粉尘多或泥泞的工地上采用浮动密封是简单有效的。国外的浮动密封装置不断改进,不仅对浮动环接合面的形状改进,对整个结构也有较大的改进,使结构更合理,性能可靠,制造、安装与维修均较方便。笔者在综合国内外常用结构的基础上,提出一种阶梯轴和不对称浮封环的密封装置。图 Floating seals are widely used in tracked construction machinery running gears and also in gearbox output shafts that are in direct contact with harsh environments. Long-term practice has proved that the use of floating seals on dusty or muddy construction sites is simple and effective. The foreign floating seal device has been continuously improved, not only improving the shape of the floating ring joint surface, but also greatly improving the entire structure, making the structure more reasonable, reliable performance, and manufacturing, installation and maintenance more convenient. Based on the common domestic and foreign structures, the author proposes a sealing device with a stepped shaft and asymmetric floating seal ring. Figure