Shaping method of bearing roller under different load conditions, bearing and mechanical equipment

Abstract

The invention discloses a method for modifying a bearing roller under different load conditions, a bearing and mechanical equipment, and the method for modifying the bearing roller under different load conditions is used for modifying a profile contour curve of a roller in the bearing. The modification method comprises the following steps: acquiring all actual load conditions of a bearing and a nonlinear stiffness coefficient of a spring for an equivalent roller; a finite element model of the bearing is established, a plurality of springs are utilized in the finite element model to be equivalent to rollers, and the nonlinear stiffness coefficients are loaded on the springs; all the actual load conditions are applied to the finite element model, and a relational graph of the positions of the multiple springs and the deformation of the corresponding springs under all the actual load conditions is established and obtained under the same coordinate system; in the relational graph, the relation between the position and the deformation is fitted, and a fitted curve is obtained and serves as a profile contour curve of the roller.

Description

technical field [0001] The invention relates to a method for modifying bearing rollers, in particular to a method for modifying bearing rollers under different load conditions, bearings and mechanical equipment. Background technique [0002] Cylindrical roller bearings are line contact bearings with strong load capacity and good fatigue resistance, and are widely used in various mechanical equipment. [0003] In cylindrical roller bearings, the contact between the roller and the raceway is a finite long-line contact. After the bearing is loaded, a large stress concentration will inevitably occur at both ends of the roller, that is, the "edge effect". Due to the existence of "edge effect", cylindrical roller bearings often suffer from fatigue damage near the end of the roller, which greatly affects the service life of the bearing. In view of the bearing disadvantages and application limitations of straight generatrix cylindrical rollers, domestic and foreign scholars and bea...

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Problems solved by technology

[0004] The current roller modification method is mainly a symmetrical modification method. When the roller bears a uniform load, this modification method can effectively solve the problem of stress concentration at the edge of the roller. However, in actual work, the bearings mostly operate under the effect of partial load. Simultaneously bear a variety of load conditions, at this time, the adaptability of the traditional roller modification method to the actual working conditions of the bearing is greatly reduced

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