泵段与泵装置能量特性曲线关系探讨

An analysis on the relations among performance curves between pump and pump-unit

研究泵段与泵装置之间扬程曲线、功率曲线、效率曲线的关系,重点分析了泵段与泵装置效率之间的差异与联系,包括两者之间的大小关系及其发展趋势.研究表明,泵装置最高效率点位于泵段最高效率点的左下方,同一流量下前者效率要高于后者,且随着流量的增加,两者效率之差越来越大.实例表明,理论推导与试验结果吻合得较好.

The characteristic curves of discharge vs head, power and efficiency between pump and pumpunit are studied. The diversity and relation included the relationship of magnitude and the trend between pump and pump-unit are analyzed specially. It is found that the best efficiency of pump-unit locates below that of pump on the left. Comparing with the efficiency of the pump-unit, that of the pump is higher as the same volume of flow. And the bigger the volume of flow, the bigger the difference of the efficiency between pump and pump-unit. Examples show that the theoretical derivation is well accordance with the test results.