中速磨煤机用碳精密封环材质对比与选择

Comparison and selection for the materials performance of carbon seal rings used in medium speed coal mills

碳精密封环是火电厂中速磨煤机中量大面广、易损的关键性和基础性零部件。针对电厂用户对碳精密封环选用不当导致磨煤机密封环费用成倍增加甚至影响生产的现状,比较了浸锑碳精密封环和浸树脂碳精密封环的制备工艺、加工工艺和生产成本的重大差异,对材质的机械性能、适用条件、使用效果和使用寿命进行了详细分析,确定了根据磨煤机的煤质情况、以满足磨煤机大修周期使用寿命为前提的最佳碳精密封环性价比选择原则。介绍的碳精密封环材质重量识别方法简单,可帮助电厂正确识别和选择碳精密封环。

Carbon sealing rings prepared by adding infiltrators, considered as the essential and damageable parts, are widely applied in medium speed coal mills in thermal power plants. In view of the problems resulted from improper selection of the carbon sealing rings, the distinct differences of preparing process, manufacturing process, production cost between the rings infiltrated phenolic resin and Sb were compared. In addition, the mechanical performance, applicability and operating life were analyzed in detail. Several selection principles for the optimum cost performance of carbon seal rings were determined on the basis of coal quality and overhaul period requirements. The introduced identification method for the quality of carbon sealing ring in this paper is simple and applicable for power plants to identify and choose the appropriate rings.