为了使泵轴高出水源水面的固定式或移动式中小型离心水泵起着和自吸泵相似的作用,国内外已有部门采用在‘吸水管上附加自吸水箱取代吸水底阀’的方法。为能适应各种尺寸的离心泵和吸水管,我们进行了试验研究,通过高速摄影,记录‘抽吸过程’,对‘自吸’机理进行了正确的理论分析,提出了水箱容积的计算公式。 In order to make the pump shaft above the water surface of the fixed or mobile small and medium-sized centrifugal water pump play a role similar to the self-priming pump, the existing domestic and foreign departments have used the method of attaching a suction box instead of a suction bottom valve on the suction pipe. . In order to adapt to various sizes of centrifugal pumps and suction pipes, we conducted experimental research, recorded high-speed photography, recorded ’suction process’, conducted a correct theoretical analysis of the ’self-priming’ mechanism, and proposed a calculation formula for the volume of the water tank. .