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| Checking method on 1000 MW RCP impeller profile |
| JIA Yun1,2,3*, LIU Xiangsong2,3, GAO Yushuang2,3 |
| 1.School of Energy Science and Engineering, Harbin Institute of Technology, Harbin, Heilongjiang 150001, China; 2.Engineering Research Center of RCP of Heilongjiang Province, Harbin, Heilongjiang 150066, China; 3.Harbin Electric Power Equipment Company Limited, Harbin, Heilongjiang 150066, China |
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Abstract To check the deviation of profiles of the blade profiles after the numerical processing of parts of RCP hydraulic parts is finished, one set of checking and evaluation methods was proposed. Through adopting a reversal engineering analysis software PolyWorks, together with a three-dimensianal measu-ring machine, three coordinates for pressure and suction at the ingress and egress side of impeller model blades and product blades were measured. At the same time, the root mean square of the deviation of profiles of the blade profiles was calculated. Through statistic and theoretical analysis on the measured data of profiles at the ingress side and egress side of blades, a calculation formula for deviating angle Δβ of profiles at the ingress and egress side of blades, the deviation formula for the angle between blades Δφ, and the modifier formula K for the part of deviation of profiles of blade profiles were proposed. This method can accurately and effectively check the scattering of profiles of hydraulic blade profiles and ensure the same wrap angle for each profile. Based on the checking and evaluation on the airfoil profiles of the impeller of the RCP impeller for Tianwan 5,6 and Fangjiashan Nuclear Plant, full load test has shown that compared with the result of numerical analysis, RCP flow meets the design deviation flow ±2.5% and pump lift deviation±1.5% required by the specification.
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Received: 31 October 2016
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