JIANG Wei1, QIU Bao-yun1, WEN Ze-hang2, CAO Hai-hong1
1.College of Energy and Dynamic Engineering, Yangzhou University, Yangzhou, Jiangsu 225009, China; 2.Luoyun Hydraulic Engineering Bureau of Jiangsu Province, Suqian, Jiangsu 223800, China
Abstract：The maintainability of large pump unit influences the maintenance time,maintenance expense,and maintenance quality directly.The five factors of pump unit maintainability are determined: maintenance objects,given conditions,given processes and means,given time,and given function.The common breakdowns of large pump units are investigated.The influencing factors on maintainability of water pump units are analyzed.The maintenance characteristics of pump units of different structures are compared.Measures are put forward to improve the maintainability of pump units.The results show that the burnout of thrust bearing liner of motors,failure of guide bearing and the pump cavitations are the main breakdowns of large pump units,and the vertical half-well casing pump has a better maintainability. large pump units;thrust bearing liner of motors;guide bearing of pumps;pump cavitations;maintainability
