Centrifugal pump rotor support structure

A centrifugal pump rotor support structure comprises a shaft, a shaft sleeve, an oil seal, a bearing, a bearing box and a bearing box gland. A rigidity thrust bearing is applied in the bearing, grease is applied to lubricate the bearing, and a double-layer O-shaped ring is placed on the sealing position between the bearing box and the shaft sleeve. Due to the facts that the rigidity thrust bearing is applied, the bearing is lubricated by the grease and the bearing box is sealed by the double-layer O-shaped sealing ring, the problem that the bearing is prone to be broken by the axial impact of the thrust disc under the condition of the discontinuity working of the centrifugal and half evacuation existing in industrial art and working condition is solved, the sealing is tight and not prone to leak, and the time of maintenance is reduced greatly. Besides, the capital is saved and the performance of the enterprise is improved.