基于ANSYS/LS-DYNA的压裂泵阀胶皮冲蚀磨损数值模拟  

Erosion numerical simulation of fracturing pump valve rubber based on ANSYS/LS-DYNA

作　　者：莫丽[1] 曾志春[1] 王晓兵[1] 

机构地区：[1]西南石油大学机电工程学院,四川成都610500

出　　处：《机械设计》2016年第8期83-87,共5页Journal of Machine Design

基　　金：国家科技重大专项"大型油气田及煤层气开发"资助项目(2011ZX05037-002)

摘　　要：针对压裂泵泵阀阀胶皮在压裂液固体颗粒冲蚀磨损下引起疲劳破坏的工程问题,运用有限元软件ANSYS/LSDYNA建立橡胶的单颗粒和双颗粒冲蚀力学模型,研究了颗粒冲蚀速度、颗粒尺寸、颗粒冲击次数对冲蚀性能的影响,并分析了阀胶皮的冲蚀失效机理。结果表明,冲蚀磨损程度随颗粒冲蚀速度的增加而增大;同一速度下,随颗粒直径的增大冲蚀磨损速度增大;颗粒冲击次数是造成阀胶皮冲蚀磨损的重要因素,经颗粒多次冲击后,阀胶皮恢复弹性的能力降低直至发生塑性变形后疲劳失效。This study aimed at the fatigue damage engineering problem of a fracturing pump valve rubber caused by erosion wear of the fracturing fluid solid particles. The finite element software ANSYS/LS-DYNA was used to build single particle and pairs of particles erosion mechanics model. The effect of the particle erosion velocity, size and impact times on erosion performance was analyzed. And the valve rubber erosion failure mechanism was analyzed. The results showed that the erosion wear degree increased with the particle erosion speed. At the same speed, erosion wear rate increased with particle diameter. The particle impact time was an important factor causing the erosion wear of valve rubber. After several impact of particles, the elasticity restore ability of valve rubber reduced to plastic deformation and fatigue failure.

关 键 词：泵阀 泥浆颗粒 阀胶皮 冲蚀磨损 ANSYS/LS-DYNA 

分 类 号：TE934[石油与天然气工程—石油机械设备]