目前国内各厂家生产的JS型砼搅拌机，其细端密封的结构虽不完全相同，但大多采用了浮动密封装置。总的来说，这种密封的效果是好的，但也不乏密封件早期磨损，短期内密封失效报废的事例。究其原因，主要是使用维护不当。因此有必要使操作者和维修人员了解和掌握密封装置的原理 At present, domestic manufacturers of JS-type ram mixer, although the structure of the thin end seal is not exactly the same, but most of the floating seal device. In general, the effect of this seal is good, but there are also instances where the seal wears out early and the seal failure fails in the short term. The reason is mainly due to improper use and maintenance. Therefore, it is necessary for operators and maintenance personnel to understand and master the principle of sealing devices.