Dynamics of the double-row tapered roller bearings

Operation of the double-row tapered roller bearings causes phenomena not observed in the single-row bearings. A dynamic model was developed to study them, where the bearing was considered as a multi-mass system of solid bodies with the discontinuous connections. This model integrates the contact hydrodynamic friction model making it possible to take into account mutual slipping of the bearing parts, self-heating of the contact oil film and possibility of the working surfaces seizing. To account for the contact pressure and friction conditions uneven distribution along the roller length, each of them was divided into the rigidly connected small cylinders, i.e. slices. The results obtained analysis showed that the inner ring periodically shifted in the axial direction during the bearing operation, which was one of the reasons causing moderate shock loads in it. Features of interaction between the double-row roller bearing parts were analyzed to ensure smooth load transfer in the support. It was established that any danger of jamming between the rollers and raceways was missing with the considered operation modes.

EDN: BCJQXR

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