刮板输送机工作环境恶劣,链轮轴组的浮动油封经常失效,造成润滑油浪费,甚至造成链轮轴组内轴承损坏。针对密封失效,从浮动油封自身特性、工作环境的影响等方面进行了分析。结果表明:工作环境的黏性矿物侵入是造成浮动油封漏油及损坏的直接原因,并据此提出相应的改进措施。 Scraper conveyor bad working environment, the sprocket shaft of the floating seal often failure, resulting in waste of oil, or even cause damage to the sprocket shaft bearings. Aiming at the failure of seal, the paper analyzes the characteristics of floating seal, the influence of working environment and so on. The results show that the intrusion of viscous minerals in the working environment is the direct cause of oil leakage and damage to the floating oil seal, and the corresponding improvement measures are put forward accordingly.