The paper aimed at the problems of bearings running in the higher operating temperature for a centrifugal pump used in water treatment system to provide high-pressure water and analyzed the reasons caused bearings running in the higher operating temperature based on stress state of pump bearing and combined with internal flow pattern with centrifugal pump. The solution was raised to change bearing types and specifications and new bearing combination scheme. The solution achieved anticipated goal to reduce the operating temperature of bearings through the experiment proves. The scheme provides a reference method for operation and maintenance to the centrifugal pump and this conclusion can also provide the reference for pump structure design.
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