Plunger type special heterotypic bearing for slurry pump

The utility model relates to a non-conventional bearing applied on plunger-type mud pump, particularly relates to a combined centripetal thrust bearing. Centripetal rollers are installed on the outer rollaway nest of the inner ring and the inner rollaway nest of the outer ring through the centripetal retainer to achieve rolling and bear radial load; the thrust rollers are installed in the rollaway nests of the left and right race rings and the side rollaway nest of the outer ring through the thrust retainer to achieve rolling and bear radial load; the inner hole of the retainer is nested outside the inner ring to limit the movement in a vertical direction. The utility model adopts the combination of a group of centripetal cylindrical roller bearings and two groups of thrust cylindrical bearings; the outer ring of the centripetal cylindrical roller bearing not only plays the role of the outer ring of a centripetal bearing, but also plays the role of the shaft washer of a thrust bearing, as a result, the installation space and cost are largely reduced. After being installed and put into operation, the technical performance is stable. Especially, application on the famous brand TPH400 3-cylinder petroleum engineering plunger designed in the USA can not only meet the requirements of customers, but also meet the load-bearing standard, and the displacement of the mud pump is increased remarkably.