目的 探索仓泵式气力输送小麦颗粒时不同输送压力下罐体及引出管内颗粒的流化特性，从而得出最佳操作压力。方法 利用Solidworks建立简易的等比例发送装置三维模型，采用模拟仿真软件Fluent对0.25、0.3、0.35 MPa等3种不同输送压力进行数值模拟，并利用CFD–Post进行数据后处理。结果 当进气口压力为0.35 MPa时物料最先输送完毕，用时为10 s。整体发料过程从引出管入口至出口处三者压力分别降低了97.1%、96.8%、98.1%，其中当进气口压力为0.3 MPa时，压力降低最小，能量利用率最高。结论 输送压力越大输送速度越快，其压降也最大。考虑经济性与高效性可得，最佳进气口压力为0.3 MPa。

The work aims to explore the fluidization characteristics of wheat particles in tank and extraction pipe under different pressure during pneumatic conveying by warehouse pump, so as to obtain the optimal operating pressure. Solidworks was used to establish a simple three-dimensional model of the equal proportion transmission device. The simulation software Fluent was used to carry out numerical simulation of three different conveying pressure of 0.25, 0.3 and 0.35 MPa, and the data were post-processed by CFD-POST. When the air inlet pressure was 0.35 MPa, the material was transported firstly, which took 10 s. The pressure of the three parts from the inlet to the outlet of the extraction pipe was reduced by 97.1%, 96.8% and 98.1%, respectively. When the inlet pressure was 0.3 MPa, the pressure reduction was the smallest and the energy utilization was the highest. The higher the conveying pressure, the faster the conveying speed and the more the pressure drop. Considering economy and efficiency, the optimal inlet pressure is 0.3 MPa.