Modeling and Dynamic Analysis of Cylindrical Roller Bearings Under Combined Radial and Axial Loads

Abstract

To improve the endurance and reliability of cylindrical roller bearings under complex operating conditions, a dynamic model of cylindrical roller bearing (CRB) is developed. The model incorporates roller-raceway contact model to optimize roller profile and is further verified with published data. Systematic parametric analyses are conducted to investigate the influence of flange angle, roller-end sphere radius and roller profile on load distribution, roller tilt, roller skew and contact performance. The results suggest that high flange-roller contact location and contact stiffness can effectively extend fatigue life of the bearing, while low flange-roller contact location can reduce the heat generation. In addition, roller profile has negligible effect on load distribution, but an optimized roller profile can improve the anti-tilt capacity. The developed model provides a tool for the internal design and frictional loss optimization of CRB under combined loads.

Tolerance Analysis of Cylindrical Roller Bearing under Combined Radial and Axial Loads

“…In this section, the authors attempt to design fange angle tolerance, roller-end radius tolerance, interval of roller length gauge, and roller profle tolerance for a NJ213ECP cylindrical roller bearing. Te basic geometry and operation parameters are shown in Table 1, which are identical to those in reference [16]. Here the fange angle υ and roller-end radius R s are assumed to be 30′ and 650 mm, respectively, which are considered to be in the reasonable range.…”

“…Te model used in the current analysis is extended from the model developed by Wang et al [16]. Some key features of the previous model are as follows.…”

“…Here, in order to investigate the efect of manufacture tolerance on the fatigue life of CRB, the fatigue life model of CRB is added. Te numerical solution scheme is shown in Figure 1, and for more numerical details, the readers are referred to [16].…”

“…From reference [16], it can be found that the values of fange angle and roller-end radius directly afect the location of contact points and roller tilt angle, which further afect the contact ellipse and contact pressure. Tus, the efect of tolerance of fange angle and roller-end radius on contact ellipsis and fatigue life is discussed in this section.…”

“…For example, for CRBs under combined axial and radial loads, the match between fange angle tolerance and rollerend radius tolerance requires additional attention. Recently, the authors have developed a dynamic simulation model of CRB under combined axial and radial loads [16], which incorporates a contact solver with skew angle consideration. Tis model will be further developed in the current article to further include the evaluation of fatigue life.…”