Bearing performance degradation assessment based on the contact stress and deformation

Aimed at the same bearing in the same condition will appear different failure modes for single bearing performance degradation evaluation, this paper puts forward a new performance degradation assessment method based on contact stress and deformation, which based on the Hertz's point contact theory and line contact theory, through calculation, the calculated with roller bearings inside the circle contact area size, produced contact stress and contact deformation by monitoring, to judge the parameter value differences with the theoretical performance degradation to achieve bearing assessment, and to 7208c bearing, for example are assessment.