往复泵吸入性能好坏与吸入系统配置有关。为了研究吸入系统配置对往复泵吸入性能的影响，实测了不同吸入系统配置时往复泵的工作特性。分析了吸入性能与吸入系统配置之问的关系。确定了最佳吸入系统配置方案。通过对实测结果分析，得出泵阀滞后现象不仅与吸入性能有关，还与泵的轴向间隙和排出压力有关，且总是存在的结论。 Reciprocating pump inhalation performance is good or bad and inhalation system configuration. In order to study the influence of the inhalation system configuration on the inhalation performance of the reciprocating pump, the operating characteristics of the reciprocating pump during different inhalation system configurations were measured. The relationship between inhalation performance and inhalation system configuration was analyzed. Determine the best inhalation system configuration. Through the analysis of the measured results, it is concluded that the valve lag is not only related to the suction performance, but also to the axial clearance and discharge pressure of the pump, which always exists.