南水北调江都三站改造技术与运行评价

发布时间：2018-04-28 00:28

本文选题：南水北调 + 泵站改造　；参考：《中国农村水利水电》2017年06期

【摘要】：南水北调江都三站工程改造中,在水泵装置选型、进水流道改造、站下引河整流、水导轴承润滑方式等方面开展广泛研究,结合工程观测、运行分析及流量测试数据表明:(1)在水泵选型研究中综合运行工况、水文数据等条件,方案合理,改造后的轴流泵机组效率由改造前的59%提升到75%。(2)采用在原流道结构基础上对DN值优化及进水流道中隔墩在出口处缩短2 m的研究方案使机组汽蚀振动减小,效果明显。(3)在泵站T型进水前池增加Y型导流墩及底坎,整流效果好,泵站边缘机组运行稳定。(4)针对含沙量较大的水质,塑料水导轴承采用清水润滑可提高轴承使用寿命。运行结果认证了工程改造过程中采用的技术装备和技术措施的可靠性和可行性,为大型泵站的技术改造提供了可以借鉴的范例。
[Abstract]:In the revamping of Jiangdu three stations of South-to-North Water diversion Project, extensive research has been carried out in the aspects of water pump device selection, water inlet channel transformation, station diversion river rectification, lubricating mode of water guide bearing, etc., combined with engineering observation. Operation analysis and flow test data show that the scheme is reasonable in the study of water pump selection, such as comprehensive operating conditions, hydrological data and other conditions. The efficiency of the modified axial flow pump unit was raised from 59% before the retrofit to 75.2) the turbine cavitation vibration was reduced by optimizing DN value on the basis of the original flow channel structure and shortening 2 m at the outlet of the inlet channel septor. The effect is obvious. (3) increasing Y type diversion piers and bottom ridges in the T inlet forebay of pumping station, with good rectifying effect, stable operation of pump station edge units. (4) aiming at the water quality with high sediment content, using clear water lubrication for plastic water guide bearings can improve the service life of the bearings. The operation result verifies the reliability and feasibility of the technical equipment and technical measures used in the process of engineering transformation, and provides a reference example for the technical transformation of large pumping stations.
【作者单位】：江苏省江都水利工程管理处;
【分类号】：TV675

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