基于ANSYS/LS-DYNA钻井泵泵阀冲击动态仿真研究  

Dynamical simulation research of valve impact for drilling pump based on ANSYS/LS-DYNA

作　　者：钟功祥[1] 武江瑜 骆家银 

机构地区：[1]西南石油大学机电工程学院,四川成都610500 [2]宝鸡石油机械有限责任公司,陕西宝鸡721002

出　　处：《机械设计》2017年第11期42-47,共6页Journal of Machine Design

基　　金：省部共建"石油天然气装备"教育部重点实验室(西南石油大学)资助项目(2016sts03)

摘　　要：针对钻井泵泵阀使用寿命短且更换次数频繁,严重制约着钻井泵向高压、高冲次及大排量方向发展的现状,构造出泵阀冲击过程的动力学模型,采用ANSYS/LS-DYNA有限元软件对不同橡胶圈伸出厚度、阀体锥角及阀座类型泵阀的冲击特性进行了动态仿真分析。研究表明:全开型泵阀最大等效应力值为706.42 MPa,该应力循环作用于阀体上,使其极易产生变形,甚至发生断裂,这和钻井现场泵阀断裂失效现象相符;当伸出厚度取0.5 mm左右时,泵阀具有较良好的冲击性能;当阀体锥角取60°时,阀体最大等效应力值最小;当阀体锥角取55°时,阀座最大等效应力值最小;三筋阀座的泵阀冲击性能最差;四筋阀座的泵阀相对于全开型泵阀能较大地减小阀体的最大等效应力。研究结果对泵阀结构设计具有一定的参考意义。Due to the short service life and high frequent replacement of the drilling pump valve, it is difficult for the pump to develop to high power and pressure as well as large volume. In view of this situation, a dynamic model of the valve impact process was established. Impact characteristics of the valve was dynamically simulated and calculated at different thicknesses extending of rubber ring, valve cone angle and valve seat types by ANSYS/LS-DYNA. The results show that maximum equivalent stress of open center valve is 706.42 MPa; The stress cycle acts on the body, and valve body can easily be deformed, even fractured, which is consistent with the actual valve failure phenomenon; When extending thickness is about 0.5 mm, the valve has a relatively good impact property; When the valve cone angle is 60°, the maximum equivalent stress on the valve body is minimal;When the valve cone angle is 55°, the maximum equivalent stress on the seat is minimal; The impact performance of valve seat with three ribs is the worst; Valve seat with four ribs relative to the open center valve can greatly reduce the maximum equivalent stress of valve body. The results have important reference for the design of valve structure.

关 键 词：泵阀 钻井泵 冲击特性 ANSYS/LS-DYNA 动态仿真 

分 类 号：TE926[石油与天然气工程—石油机械设备]