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用有限单元法对ＯＰＩ－ １８００ＡＷＳ型压裂泵柱塞密封副进行了有限元分析，获得了橡胶密封圈与柱塞之间接触应力的分布规律以及接触应力与工作介质压力的关系。计算表明：橡胶密封圈在工作介质压力的作用下，有“偏离效应”的存在。即在密封圈的接触宽度上，唇部受拉伸，根部受压缩，主密封在靠近唇部位置；同时，主密封带的位置不随介质压力的变化而变化，且最大接触应力与工作介质压力之比为１ ．２３ 。所有这些为润滑状态和密封机理的分析提供了计算依据，同时为密封圈结构设计提供了新的认识和理论依据。
The finite element method was used to analyze the piston seal of OPI-1800AWS fracturing pump. The distribution of contact stress between rubber seal and plunger and the relationship between contact stress and working medium pressure were obtained. The calculation shows that there is a “deviation effect” of the rubber seal under the pressure of working medium. That is, the contact width of the seal ring, the lip is stretched, the root is compressed, the main seal near the lip position; the same time, the location of the main seal with the media pressure does not change, and the maximum contact stress and the working medium pressure The ratio of 1. 23. All of these provide a basis for the analysis of lubrication conditions and sealing mechanism, and provide a new understanding and theoretical basis for the design of the seal ring structure.