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本设计涉及釜用搅拌轴的机械密封，其特征是在静环的内侧设有容留磨屑的环形槽。对于顺磁性磨屑，在环槽底部设置了永磁体对其进行磁性吸附。本结构用于防止动、静环摩擦产生的磨屑及润滑液进入釜内，避免对釜中物料造成污染。
The design involves the mechanical seal of the stirring shaft of the kettle, and is characterized in that an annular groove for retaining debris is arranged on the inner side of the static ring. For paramagnetic debris, a permanent magnet is provided at the bottom of the ring groove to magnetically adsorb it. The structure is used for preventing abrasion debris and lubricating liquid generated by the friction between the static and dynamic rings from entering the autoclave to avoid the pollution of the material in the autoclave.