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논문 기본 정보

자료유형
학술저널
저자정보
저널정보
한국유체기계학회 International Journal of Fluid Machinery and Systems International Journal of Fluid Machinery and Systems Vol.8 No.1
발행연도
2015.3
수록면
46 - 54 (9page)
DOI
http://dx.doi.org/10.5293/IJFMS.2015.8.1.046

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Thrust-ring-pump is a kind of extreme-low specific speed centrifugal pump with special structure as numerous restrictions from thrust bearing and operation conditions of hydro-generator units. Because the oil circulatory and cooling system with thrust-ring-pump has a lot of advantages in maintenance and compactness in structure, it has widely been used in large and medium-sized hydro-generator units. Since the diameter and the speed of the thrust ring is limited by the generator set, the matching relationship between the flow passage inside the thrust ring (equivalent to impeller) and oil bath (equivalent to volute) has great influence on hydrodynamic performance of thrust-ring-pump. On another hand, the head and flow rate are varying with the operation conditions of hydro-generator units and the oil circulatory and cooling system. As so far, the empirical calculation method is employed during the actual engineering design, in order to guarantee the operating performance of the oil circulatory and cooling system with thrust-ring-pump at different conditions, a collaborative hydrodynamic design and optimization is purposed in this paper. Firstly, the head and flow rate at different conditions are decided by 1D flow numerical simulation of the oil circulatory and cooling system. Secondly, the flow passages of thrust-ring-pump are empirically designed under the restrictions of diameter and the speed of the thrust ring according to the head and flow rate from the simulation. Thirdly, the flow passage geometry matching optimization between thrust ring and oil bath is implemented by means of 3D flow simulation and performance prediction. Then, the pumps and the oil circulatory and cooling system are collaborative hydrodynamic optimized with predicted head-flow rate curve and the efficiency-flow rate curve of thrust-ring-pump. The presented methodology has been adopted by DFEM in design process of thrust-ring-pump and it shown can effectively improve the performance of whole system.
#Thrust-ring-pump #Hydrodynamic design #Low specific speed centrifugal pump #Lubricating and cooling system #Thrust bearing #Hydro turbine generator

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참고문헌 (9)

참고문헌 신청
WU Zhongde / 2004 / Technology of outer circulation with runner-pump for hydro generators / Central China Electric Power 17(6):32~34 google schola CAO Kai / 2010 / Hydropower and Energy :60~62 google schola YI Haiting / 2009 / Design of fully air-cooled 700MW Laxiwa hydro generator / Water Power 35(11):37~38 google schola LEI Ting / 2012 / Research on thrust supports performance and runner-pump extrinsic technology of Silver Plate Hydropower Station / Journal of Mechanical & Electrical Engineering 29(9):1042~1045 google schola LI Renhong / 2002 / The design characteristics of Tianshengqiao Secondary Hydropower Station’s hydraulic machinery / Guizhou Water Power 16:58~61 google schola

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