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Effects of Rolling Parameters and Curvature Coefficient on Fatigue Life for Deep Groove Ball Bearings

Author: LiuCiYing
Tutor: LiYouTang
School: Lanzhou University of Technology
Course: Mechanical Manufacturing and Automation
Keywords: Deep groove ball bearings Hertz contact theory Finite Element Method ANSYS software Contact stress Numerical Simulation of fatigue life
CLC: TH133.33
Type: Master's thesis
Year: 2010
Downloads: 167
Quote: 1
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Abstract


Deep groove ball bearing structure is simple, easy to use, is the largest production volume, and the widest range of applications for a class of bearings. The fatigue life of the bearing is a comprehensive reflection of the quality of the bearings. But bearing more complex conditions, bearing test is difficult to accurately simulate the experimental period is very long, slower obtain experimental data. In order to solve the above problems, the deep groove ball bearings for the research object, starting from the point of view of its design, bearing the number of rolling elements rolling element diameter and within the outer groove curvature coefficient calculated by the finite element simulation analysis of bearing contact The study of stress and deformation, as well as bearing fatigue life under the influence of a combination of factors, numerical simulation technology. Hertz contact theory, based on the bearing locally refined through a reasonable set the contact area, the contact area of ??the grid and create contact right, according to the actual conditions of the bearing to impose reasonable boundary conditions, the ANSYS parametric language APDL deep groove ball bearing three-dimensional finite element analysis model. Considering the number of rolling element rolling body diameter and the inner and outer groove curvature coefficient factors, finite element calculation of deep groove ball bearings, various factors bearing contact stress and deformation. Hertz theoretical solution and compare validation to ensure the rationality of the finite element analysis and calculation of bearing contact stress, the stress results for the numerical simulation of fatigue life. In the fatigue life of the numerical simulation, considering the number of bearing rolling elements rolling element diameter and the inner and outer groove curvature coefficient factors, the nominal stress method numerical simulation of the fatigue life of deep groove ball bearings. With ANSYS software fatigue analysis module bearing the fatigue life of the finite element simulation, obtained various factors bearing fatigue life. The calculation results with the results of the LP theory of life, and between the error analysis; final technical measures to improve bearing life. Can be found through the study, the number of rolling element rolling diameter within the outer groove curvature coefficient, the main factors affecting bearing life. The results show that: the The the fatigue dangerous parts of the deep groove ball bearing rolling element and raceway contact points at the bearing life with the rolling body increase in the number of improved; bearing life improve with the increase in the diameter of the rolling element; When the inner and outer groove curvature coefficient fi ≤ 0.51, Fe ≤ 0.515, bearing fatigue life improve; when fi ≥ 0.51, fe ≥ 0.515, bearing fatigue life is reduced. On finite element calculation of the deep groove ball bearing fatigue life simulation method can be well simulated bearing complex working conditions, forecast credibility life results.

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CLC: > Industrial Technology > Machinery and Instrument Industry > Mechanical parts and gear > Moving parts > Bearing > Rolling
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