The characteristics of the rolling bearing the convex type roller

The characteristics of the rolling bearing the convex type roller - 2019 07 - 04 the convex type roller rolling bearing has a fixed on the entire length of the roller surface curvature, the roller busbar is a circular arc. Without load, therefore, the Netherlands, between roller and raceway periods of a few microns, convex surface and the Angle between the chamfering is smaller than that of straight generatrix and chamfering, thus makes the roller contact force transfer condition is better. However, it has an obvious shortcomings, when the load is small, roller and raceway contact approximate point contact, contact area for ellipse, contact stress distribution by half elliptical pattern is likely to lead to tilt. In the central heavy load, the contact stress and significantly greater than the edge, uneven distribution of contact pressure stress, small sliding wear risk. Using the convex type busbar, roller contact length changes over load size, at light load, only the effective length of a small number of roller into contact, is not a uniform distribution. Only under heavier load, the roller all effective length into contact, stress a little more evenly. When the load increases and more than a certain value, also produces the edge effect on both ends of the roller, but much smaller than straight generatrix roller. Because it assumes the point contact, can adapt to a certain partial loading, this is the crown shape roller of the biggest advantages. The elliptic curve of the convex type roller contact load distribution uniformity is better than arc full crown roller, but still did not change the nature of point contact, on both sides of the roller contact pressure is still higher than in central. But this kind of roller is superior than straight generatrix roller contact. （ Source: the resources of railway vehicle platform)