Comparisons of contact pressures of crowned rollers

Ju, Shen-Haw; Horng, Thin-Lin; Cha, Kuo-Chiang

doi:10.1243/1350650001543061

Cited by 22 publications

(10 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In this case, the distribution of pressures in the inner tracks of the bearing, which are in contact with the rollers, was not studied (in contrast to references [17] and [18]). Rather, the aim was to obtain the distribution of pressures in the axle of the vehicle.…”

Section: Description Of the Problemmentioning

confidence: 99%

Combining regression trees and the finite element method to define stress models of highly non-linear mechanical systems

Lostado

Martínez-de-Pisón

Pernía

et al. 2009

The Journal of Strain Analysis for Engineering Design

View full text Add to dashboard Cite

This paper demonstrates that combining regression trees with the finite element method (FEM) may be a good strategy for modelling highly non-linear mechanical systems. Regression trees make it possible to model FEM-based non-linear maps for fields of stresses, velocities, temperatures, etc., more simply and effectively than other techniques more widely used at present, such as artificial neural networks (ANNs), support vector machines (SVMs), regression techniques, etc. These techniques, taken from Machine Learning, divide the instance space and generate trees formed by submodels, each adjusted to one of the data groups obtained from that division. This local adjustment allows good models to be developed when the data are very heterogeneous, the density is very irregular, and the number of examples is limited. As a practical example, the results obtained by applying these techniques to the analysis of a vehicle axle, which includes a preloaded bearing and a wheel, with multiple contacts between components, are shown. Using the data obtained with FEM simulations, a regression model is generated that makes it possible to predict the contact pressures at any point on the axle and for any condition of load on the wheel, preload on the bearing, or coefficient of friction. The final results are compared with other classical linear and non-linear model techniques.

show abstract

Section: Description Of the Problemmentioning

confidence: 99%

Combining regression trees and the finite element method to define stress models of highly non-linear mechanical systems

Lostado

Martínez-de-Pisón

Pernía

et al. 2009

The Journal of Strain Analysis for Engineering Design

View full text Add to dashboard Cite

show abstract

“…Furthermore, extensive research was subsequently performed to improve the load-carrying properties of the bearings by modifying the profile of the roller. [6][7][8] According to research, stress concentration at the contact end between the rollers and raceways can be improved by changing the roller/raceway adjustment and applying better modified profiles to the rollers. 9,10 Park 11 researched the impact of roller bearing misalignment on contact stress under the condition of elastohydrodynamic lubrication, and the results showed that under such a condition the contact stress variation caused by roller tilt can be considerable.…”

Section: Introductionmentioning

confidence: 99%

Effects of axial misalignment of rings on the dynamic characteristics of cylindrical roller bearings

Wang

2015

Proceedings of the Institution of Mechanical Engineers, Part J:

View full text Add to dashboard Cite

Axial misalignment of bearing rings has an effect on the loading characteristics and stability of cylindrical roller bearings. Based on the kinematic relationship between bearing elements, a dynamic model of cylindrical roller bearings was developed. The effect of axial misalignment of rings on the contact pressure distribution of cylindrical roller bearings with a Lundberg logarithm modified profile roller was analysed. The vibration of the contact pressure and the cage stability during bearing operation were also analysed. The results show that a tilt between the inner ring and outer ring leads to stress concentration along the roller generatrix of the roller in the loaded zone. At the same time, when the bearing in operation, the cage sliding ratio and swing amplitude of the rollers in the loaded zone increase with the increasing tilt angle of the inner ring. The stress concentration of the rollers in the loaded zone that results from the tilt between the inner ring and outer ring could be improved by increasing the Lundberg logarithm modified coefficient.

show abstract

“…Initial clearance, one of the important design parameters of rolling bearings, influences the load-carrying properties and fatigue life of bearings directly. 1 In the past several decades, a number of researches on roller modification have been reported, [2][3][4] and modification model of cylindrical roller was proposed, such as changing the fitness between roller and raceway, using different modification curves, and so on, 5,6 to make full use of roller length and improve edge stress concentration of rollers effectively. However, since cylindrical roller bearings only bear radial load, its initial clearance could not be eliminated through preloading such as ball bearings.…”

Section: Introductionmentioning

confidence: 99%

Optimization analysis on assembly interference of cylindrical roller bearings

Wang

2015

Advances in Mechanical Engineering

View full text Add to dashboard Cite

Distribution of loads and contact stress has a great influence on fatigue life of bearings. In view of the fact that the nonload area is ubiquitous in cylindrical roller bearings, there is a method for prolonging the fatigue life design by adjusting the working clearance of cylindrical roller bearings. In this article, optimization model of fatigue life of cylindrical roller bearings is developed with a quasi-dynamic method and calculated method of bearing life based on micro-area contact, considering the effect of assembly interference, temperature rise, and high-speed centrifugation. Aiming to the different geometry parameters and operating parameters of bearings, the effects of assembly interference on bearing fatigue life are discussed. The results show that the optimum fatigue life of roller bearings is achieved at negative working clearance with the loads distributed evenly within half ring. The optimum working clearance of roller bearings is not influenced by radial load. But with the increase in pitch diameter or decrease in rolling elements, the optimum assembly interference increases, and accelerating revolution of roller bearings will increase the optimum assembly interference as well.

show abstract

Comparisons of contact pressures of crowned rollers

Cited by 22 publications

References 8 publications

Combining regression trees and the finite element method to define stress models of highly non-linear mechanical systems

Combining regression trees and the finite element method to define stress models of highly non-linear mechanical systems

Effects of axial misalignment of rings on the dynamic characteristics of cylindrical roller bearings

Optimization analysis on assembly interference of cylindrical roller bearings

Contact Info

Product

Resources

About