转速对油泵空化性能影响及其换算研究  

INFLUENCE OF THE SHAFT SPEED TO THE CENTRIFUGAL OIL PUMP CAVITATION CHARACTERISTICS AND CONVERSION STUDY

作　　者：曹广军[1] 吴玉林[1] 刘树红[1] 陈刚[1] 傅苏红[2] 

机构地区：[1]清华大学热能工程系,北京100084 [2]总后油料研究所,北京102300

出　　处：《工程热物理学报》2008年第1期65-67,共3页Journal of Engineering Thermophysics

基　　金：总后物油部资助项目(No．油20000107)

摘　　要：离心泵输送粘性流体时的空化余量,目前还没有成熟的理论计算方法。本文通过实验研究了转速、流量和输送介质的粘度对离心油泵空化性能的影响。实验结果表明:泵的临界空化余量和空化余量换算系数与输送介质的粘度和流量有关。随着粘度的增加,泵的临界空化余量和空化余量换算系数增加;随着流量的增加,泵的临界空化余量增加,而空化余量换算系数减小。There is no accurate calculation method on how to calculate the net positive suction head （NPSH） of the centrifugal pump when transporting viscous fluids. In this paper, the effect of shaft speed, flowrate and viscosity of fluids on the cavitation performance of the centrifugal pump have been studied by experiment. Experimental results show that the critical NPSH of the centrifugal pump and the NPSH conversion coefficient are related to the fluids viscosity and the flowrate. With increasing the fluids viscosity, the critical NPSH and its conversion coefficient are both increasing; with increasing the pump flowrate, the critical net positive suction head is increasing, but the critical net positive suction head is decreasing.

关 键 词：离心油泵 粘性流体 空化性能 换算方法 

分 类 号：TH311[机械工程—机械制造及自动化]