| 万 亮,高先梨,余明江,涂征宇,余唯扬,王 瑶.立磨液压缸杆头疲劳断裂机理研究及系统性改进[J].水泥工程,2026,39(4):49-53 |
| 立磨液压缸杆头疲劳断裂机理研究及系统性改进 |
| Research on the fatigue fracture mechanism and systematic improvement of the rod head of the vertical mill hydraulic cylinder |
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| 中文关键词: 立磨 液压缸杆头 疲劳断裂 交变剪切应力 预防性维护 |
| 英文关键词: vertical mill hydraulic cylinder rod head fatigue fracture alternating shear stress preventive maintenance |
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| 中文摘要: |
| 本文以我公司连续发生的杆头断裂故障为研究对象，通过理论计算、现场检测、断口分析与运行数据整合，系统揭示了杆头断裂的根本原因与演化机理。研究发现，杆头在静态拉应力下强度充足，其失效主因是“结构偏心”与“磨损导致的安装不对中”共同引发的双重交变剪切应力叠加，最终导致高周疲劳断裂。针对故障根源，本文提出了涵盖材料升级、结构优化、精密维护、工艺控制与智能监控五个维度的系统性改进策略。通过实施材料替换为42CrMo并优化热处理工艺、严格控制摇臂轴承间隙≤0.1 mm、建立基于状态的预防性维护体系、保证入磨物料粒度≤80 mm、并引入在线振动监测系统，可从根本上降低杆头断裂风险。 |
| 英文摘要: |
| This paper takes the continuous rod head fracture failures occurring in our company as the research object. Through theoretical calculations, on-site inspections, fracture analysis, and integration of operational data, the fundamental causes and evolution mechanism of the rod head fracture are systematically revealed. The study finds that the rod head has sufficient strength under static tensile stress, and its main failure reason is the superposition of dual alternating shear stresses caused by “structural eccentricity”and “installation misalignment due to wear”,ultimately leading to high-cycle fatigue fracture.Addressing the root cause of the failure, this paper proposes a systematic improvement strategy covering five dimensions: material upgrading, structural optimization, precision maintenance, process control, and intelligent monitoring. By implementing material substitution to 42CrMo and optimizing the heat treatment process, strictly controlling the rocker bearing clearance to ≤0.1 mm, establishing a condition-based preventive maintenance system, ensuring the particle size of the material entering the mill to be ≤80 mm, and introducing an online vibration monitoring system, the risk of rod head fracture can be fundamentally reduced. |
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