压裂泵泵阀变形及应力分布规律的有限单元法分析

利用有限单元法,计算分析了在特定工况下不同阀面锥角的压裂泵阀座的变形和应力及其分布规律,指出:阀座通孔孔边径向变形随阀面锥角的增大而增大;阀面半锥角为60°时,最大综合应力最小,大于或小于60°时,最大综合应力都将增大;阀座上的两个高应力分布区,分别位于工作阀面金属接触区表层和阀座通孔上部表层;从阀座通孔表面及工作阀面表面向内深入超过2mm的区域,综合应力值一般为250～260MPa。阀座通孔表层高应力区的发现,表明强化表层以提高阀座整体强度的必要性。

Finite Element Analysis of Deformation and Stress Distribution on Fracturing Pump Valves

The authors, by the finite element method, analyze the deformationand stress distribution on fracturing pump valve seats with different face cone angles under a given working condition and point out: the radial deformation of the bore edge of the valve seat increases with the increase of the face cone angle; the resultant stress will be the minimum by 60 ° cone semivertex angle; the metal-to-metal working surface and the upper part of the bore surface are two high stress regions on the valve seat.The high stress on bore surface indicates the necessity for enhancing the strength of bore surface.