求翻译：摘要：本文针对昆钢炼钢厂LF精炼炉精炼炉液压系统由于设计缺陷，系统在实际运行中存在压力冲击过大、运行平稳性差， 炉盖提升系统存在的链条断损这一问题，通过故障原因分析后，找出了造成链条断损的原因是链轮设计不合理和承载问题。通过对精炼炉液压系统炉盖提升系统的改造解决原有存在的问题，达到改进的目的。为昆钢增加经济效益作阐述。是什么意思？

Abstract: this paper for LF refining furnace refining furnace of Kunming steel's steel-making plant due to a design defect of the hydraulic system, exists in the system actually run pressure impact too large, poor ride quality, chain breakdown of furnace cover lifting systems this problem through fault reason analysis, identify the cause of breakdown of chain sprocket design is unreasonable and bearing problems. Through modification of hydraulic system for ladle furnace cover lifting systems solve problems in the original, achieve the purpose of improvement. Kunming steel's increased economic benefits for elaboration.