曲轴
柱塞泵
往复泵
往复运动
柱塞
机制(生物学)
追踪
失效机理
材料科学
机械工程
燃油泵
流体压力
工程类
结构工程
计算机科学
变量泵
物理
气体压缩机
操作系统
量子力学
作者
Jie Dong,Shendan Zhao,Zhongkai Wang,Liejiang Wei,Hailong Bian,Yinshui Liu
标识
DOI:10.1016/j.engfailanal.2022.106595
摘要
• A Constructure-Kinematics-Materials-Craftsmanship (CKMC) method was proposed. • Failure of the crankshaft originates from the high-cycle fatigue of the fillet. • Material defects and lack of nitride layer at fillets accelerate failure process. • Recommendations for preventing future failures were presented. Crankshaft fracture is a typical failure form of reciprocating high-pressure plunger pump. Different from traditional power machinery, the number of plungers in plunger pumps is usually odd, which leads to unbalanced radial force of the crankshaft and greatly increases the risk of failure. The crankshaft of a 250 kW high-pressure plunger pump was fractured, and the fracture morphology was river-shaped, which was a typical fatigue failure. To trace the failure of the crankshaft, a Constructure-Kinematics-Materials-Craftsmanship (CKMC) method was brought out. The microstructure of the damage zone was observed, and a three-dimensional transient finite element model was established to find the most dangerous zone and damage mechanism. The results show that high-cycle fatigue of fillet zone is the main reason for crankshaft fatigue failure. Material defects and lack of nitrided layer at fillet are the key factors to accelerate crankshaft failure. Finally, recommendations for preventing future failures were presented.
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