摘要
为了消除某一单级单吸离心泵扬程曲线存在驼峰的现象,改善性能曲线稳定性,采取3种处理措施,分别为同时减小叶轮进口直径和叶轮出口宽度、在吸入段内增加2块对称布置的隔板、在吸入段内增加1块隔板.通过3次性能试验测试对比分析了3种措施的可行性和有效性.试验结果表明:同时减小叶轮进口直径和叶轮出口宽度,扬程曲线形状几乎无变化,驼峰依然存在,扬程整体有一定的损失和减小,对改善驼峰无明显正面作用;在吸入段内增加2块对称布置的或者1块隔板后,扬程曲线的驼峰几乎完全消失,且扬程值和效率值损失微小,消除驼峰有较明显的效果.为进一步验证吸入段内增加隔板对消除驼峰的作用,在另一扬程曲线有驼峰的单级单吸离心泵上进行试验验证,表明增加隔板后,驼峰完全消除,泵性能仅有轻微的损失,验证了此处理措施的有效性.
Experiments showed that there was a hump in the head curve of a single-stage end-suction centrifugal pump.To eliminate the hump and improve the stability of the curve,three measures were taken:(1)reducing impeller inlet diameter and blade outlet width,(2)installing two baffles arranged symmetrically in the suction nozzle,and(3)adding one baffle in the nozzle only.The tested results show that measure(1)makes the shape of the head curve almost unchanged,thus the hump is still present,just as a whole the head suffers from a certain amount of reduction.This suggests measure(1)generates no obviously positive effect on the hump elimination.After measure(2)or(3)is taken,the hump in the head curve almost disappears,and the losses in the head and efficiency are minor.The effect of these two measures on eliminating the hump is significant.To validate measure(3)further,the performance curves of another single-stage end-suction centrifugal pump with and without a baffle were tested.The tested data reveal that the added baffle results in the hump eliminated basically with a slight loss in the pump performance only,and the effectiveness of the treatment has been confirmed.
作者
陈燕
王天周
白小榜
罗绍华
张永祥
CHEN Yan;WANG Tianzhou;BAI Xiaobang;LUO Shaohua;ZHANG Yongxiang(National Enterprise Technology Center,Chongqing Pump Industry Co.Ltd.,Chongqing 400033,China)
出处
《排灌机械工程学报》
EI
CSCD
北大核心
2020年第1期28-31,57,共5页
Journal of Drainage and Irrigation Machinery Engineering
基金
重庆市重点产业共性关键技术创新专项(cstc2017zdcy-zdcy0169)
关键词
离心泵
性能曲线
驼峰
隔板
试验研究
centrifugal pump
performance curve
hump
baffle
experiment investigation
