排灌机械工程学报2025，Vol.43Issue(7)：686-694,9.DOI:10.3969/j.issn.1674-8530.23.0084
运行参数对全金属螺杆泵空化现象的影响分析
Influence of operating parameters on cavitation phenomenon of all-metal screw pump
摘要
Abstract
In order to examine the influence of different operating parameters such as temperatures,pressure differences,rotor speeds,oil viscosity and clearance values on cavitation phenomenon in all-metal screw pumps,numerical simulations of flow field were carried out utilizing PUMPLINX software.The gas phase volume fraction,cavitation flow field distribution characteristics and turbulent kinetic energy distributions were studied under different factors.The results show that cavitation is extremely sensitive to changes in high temperatures,with an increase in temperature significantly enhancing the likelihood of cavitation occurrence.However,upon reaching a specific temperature threshold,the extent of cavitation remains stabilizes.The cavitation intensity of the screw pump is attenuated by an in-crease in pressure difference,a reduction in viscosity,and a decrease in clearance value.The influence of rotational speed on cavitation intensity is minimal,however,it does extend the duration re-quired to achieve a stable state.Specifically,at a rotational speed of 1 000 r/min,the time to reach stability is approximately 0.2 seconds longer compared to 200 r/min.An increase in pressure diffe-rence,viscosity and clearance value strengthen the turbulent kinetic energy and maintain a constant frequency.Consequently,both the mean and maximum pulsation amplitudes increase,the speed slowly increases(approximately 0.18 s)to achieve a relatively stable turbulent state.The analysis of the in-fluence of operating parameters on the cavitation can serve as a valuable reference for the optimal de-sign of the all-metal screw pump.关键词
全金属螺杆泵/运行参数/空化现象/数值模拟Key words
all-metal screw pump/operating parameter/cavitation phenomenon/numerical simulation分类
农业科技引用本文复制引用
周婧,谢杰,卢林,李亚..运行参数对全金属螺杆泵空化现象的影响分析[J].排灌机械工程学报,2025,43(7):686-694,9.基金项目
天津市自然科学基金资助项目(18JCQNJC75100) （18JCQNJC75100）
天津市科技计划项目(18ZRHGX0020) （18ZRHGX0020）
