排灌机械工程学报
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Journal of Drainage and Irrigation Machinery Engin  2012, Vol. 30 Issue (2): 157-161    DOI: 10.3969/j.issn.1674-8530.2012.02.007
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Optimization design of submersible pump rotor system for coal mine based on Ansys
 CAO  Wei-Dong-1, GAO  Yi-1, WANG  Xiu-Lan-1, XU  Rong-Jun-2
(1.Research Center of Fluid Machinery Engineering and Technology, Jiangsu University, Zhenjiang, Jiangsu 212013,China; 2.Nanjing Lanshen Pump Corp. (Group) Ltd., Nanjing, Jiangsu 211500, China)
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Abstract The flow passages and rotor system of a coal mine submersible centrifugal pump were built by the 3D software Pro/E, and an unstructured mesh was generated in the passages with the software ICEM. The characteristics of such a multistage pump were estimated through the code CFX at different operating conditions based on the Reynolds timeaveraged Navier-Stokes (RANS) equations combined with the standard k-ε turbulence models and SIMPLEC scheme, and compared with experimental data, their reliability was confirmed. The simulated fluid flow results were input into Ansys Workbench to calculate the modes of the rotor system with two pivots by using fluidstructure interaction method, it was found that the first order critical speed of the rotor system was lower than the pump rotational speed. According to the deformation patterns of the rotor system the rotor system was redesigned with three pivots, the calculated critical speed of the new rotor system met the design requirement. Obviously, the life span of bearings will be extended. The results show that the quick damage of bearings 7217AC/DB and serve erosion of wearrings are mainly due to the too low critical speed of the original rotor system. The critical speed of the threepivot rotor system is higher than the pump rotational speed and it will greatly improve the reliability of both bearings and sealingrings.
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Articles by authors
CAO Wei-Dong
GAO Yi
WANG Xiu-Lan
XU Rong-Jun
Key wordssubmersible pump for coal mine   rotor system   fluid structure interaction   model analysis   critical speed     
Received: 2011-11-12; Published: 2012-03-30
Cite this article:   
CAO Wei-Dong,GAO Yi,WANG Xiu-Lan et al. Optimization design of submersible pump rotor system for coal mine based on Ansys[J]. Journal of Drainage and Irrigation Machinery Engin, 2012, 30(2): 157-161.
 
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