Roller profile modification is often used to unify the pressure distribution and to prolong the life of the roller. In this paper, the formula of the optimum modification coefficient for the logarithmically profiled roller is derived to design the roller profile based on the elastohydrodynamic lubrication model of finite-length line contact. In order to demonstrate the feasibility of this formula, a set of fatigue life tests was conducted. The results show that the optimum roller profile predicted by the presented formula can provide the longest fatigue life. Thus, this method can be directly applied.
OswaldFBZaretskyEVPoplawskiJV. Effect of roller geometry on roller bearing load–life relation. Tribol Trans2014; 57(5): 928–938.
2.
PoplawskiJVPetersSMZaretskyEV. Effect of roller profile on cylindrical roller bearing life prediction—part II: comparison of roller profiles. ASLE Trans2001; 44(3): 417–427.
3.
FujiwariHKawaseT. Logarithmic profiles of rollers in roller bearings and optimization of the profiles. NTN Tech Rev2007; 75: 140–148.
4.
FujiwaraHKobayashiTKawaseT, et al.Optimized logarithmic roller crowning design of cylindrical roller bearings and its experimental demonstration. Tribol Trans2010; 53(6): 909–916.
5.
LundbergG. Elastic contact between two semi-infinite bodies. Forschung Gebiete Ingenieurwesen1939; 5: 201–211.
6.
TallianTE. Rolling bearing life modifying factors for film thickness, surface roughness, and friction. J Tribol1981; 103(4): 509–520.
7.
LiuJYTallianTEMccoolJI. Dependence of bearing fatigue life on film thickness to surface roughness ratio. ASLE Trans1975; 18(2): 144–152.
8.
ChenXYShenXJWenXU, et al.Elastohydrodynamic lubrication studies on effects of crowning value in roller bearings. J Shanghai Univ2001; 5(1): 76–81.
9.
ParkTJ. Elastohydrodynamic lubrication analysis of a Lundberg profile-type cylindrical roller. J KSTLE2013; 29(6): 353–359.
10.
PatirNChengHS. An average flow model for determining effects of three-dimensional roughness on partial hydrodynamic lubrication. J Lubr Technol1978; 100: 12–17.
11.
Roelands C. Correlational aspects of the viscosity-temperature pressure relationship of lubricating oils. PhD Thesis, Deft University, The Netherlands, 1966, 495p.
12.
DowsonDHigginsonGR. Elastohydrodynamic lubrication, New York: Pergamon Press, 1966.
13.
ZhaoYMaiettaDMChangL. An asperity micro-contact model incorporating the transition from elastic deformation to fully plastic flow. J Tribol2000; 122: 86–93.
14.
McCoolJI. Relating profile instrument measurements to the functional performance of rough surfaces. Trans ASME J Tribol1987; 109(2): 264–270.
15.
WangZJShenXJChenXY, et al.Experimental study of starvation in grease-lubricated finite line contacts. Indus Lubr Tribol2017; 69(10): 963–969.
16.
MasjediMKhonsariMM. Film thickness and asperity load formulas for line-contact elastohydrodynamic lubrication with provision for surface roughness. J Tribol2012; 134: 011503–011503.
17.
WangZJYuQTShenXJ, et al.A simple model for scuffing risk evaluation of point contact under mixed lubrication. J Tribol2017; 140: 031502–031502.
