The failure analysis of centrifugal pump bearings shows that hollow bearing blocks with cooling device would have a larger deformation if long-term used in a larger temperature difference between the inside and outside.

Basing on the test of the hydraulic parameters of bearing prong in type 150JD56 long-axial pump, this research determined a plural retrogression formula on local resistance coefficient of bearing prong when a long-axial pump runs at the highest efficiency, and introduced the methods and steps in experiment, providing scientific foundation for the reasonable corollary of aqueduct in l.