Effects of off-sized cylindrical rollers on the static load distribution in a cylinder roller bearing

Advances in Mechanical Engineering

et al. 2017

For the rotary motion of a rolling bearing implemented by bearing components under geometric constraints, the rotational accuracy of assembled bearing should also be the result of interaction among geometric errors of bearing components. Therefore, it is significant to research the relationship between geometric errors of bearing components and rotational accuracy of assembled bearing for the design and prediction of bearing accuracy. An accuracy prediction method is proposed to study how the geometric errors of bearing components affect the radial runout of outer ring of cylindrical roller bearings in this article. Furthermore, the calculation model for the orbit of outer ring center is established from which the radial runout of outer ring can be predicted while dimension and roundness errors of raceways and rollers are given arbitrarily. Theoretical algorithms with two typical shapes of outer raceway are deduced to verify the prediction method. In addition, a test on the radial runout of outer ring in a cylindrical roller bearing is performed. The results indicate that prediction results are in good agreement with experimental and analytical results.

Section: Introductionmentioning

confidence: 99%

A method to predict the radial runout of outer ring in cylindrical roller bearings

Advances in Mechanical Engineering

et al. 2017

“…Noguchi 25 studied influences of balls' diameter differences on value of retainer revolution and showed that the mean value of the retainer revolution decreases as the number of balls increases in a rolling bearing. Chen et al 26 present a static model to investigate the effects of diameter differences among cylindrical rollers on the load performance in a bearing. In the same year, Chen et al 27 conducted further research to investigate the effect of raceway roundness and roller diameter errors on the radial clearance and runout of the bearing and found that clearance, and runout are greatly affected by the rollers' diameter errors rather than their positions.…”

Section: Introductionmentioning

confidence: 99%

Effects of axial preloading displacement and off-sized balls and raceway error on mechanical performance of angular contact ball bearings

Proceedings of the Institution of Mechanical Engineers, Part K:

Peng

et al. 2016

Taking the off-sized balls and raceway error into account, the effects of axial preloading displacement on the mechanical performance of angular contact ball bearings are investigated in this paper. Through the geometric analysis of the angular contact ball bearing and the force balance, the contact load-deformation expressions of ball-to-raceway, the expression of load zone and their relation to axial preloading displacement are derived. By numerical calculation for a concrete example, we found the influences of preloading on the loading zone and maximum ball load and found the influences of off-sized balls and raceway error on the minimum preloading displacement, ball load distribution, inner ring centre trajectory and inner ring vibration frequency. Some curves about these influences are obtained and discussed.

“…where is the distance between any point on the inner raceway and the center of the th roller, which is calculated by (14).…”

Section: Contact Statuses Of the Inner Raceway In Different Positionsmentioning

confidence: 99%

“…Yang et al [10][11][12] established a mathematical model and a five-degree-of-freedom model to research the influences of geometric error on the NRRO of an angular contact ball bearing. Chen et al [13,14] developed a one-dimensional mathematical model with algebraic equation considering roundness error of the raceways and diameter error of the rollers. The influence of diameter differences among the rollers on the load performance in a cylindrical roller bearing was investigated.…”

Section: Introductionmentioning

confidence: 99%

Prediction Method for the Radial Runout of Inner Ring in Cylindrical Roller Bearings

Mathematical Problems in Engineering

et al. 2017

The motion error of assembled bearing depends on the geometric profile of bearing components. Therefore, it is crucial to establish the relationship between geometric error of bearing components and motion error of assembled bearing, which contributes to improving the rotational accuracy of assembled bearing in the design and machining of the bearing. The main purpose of this research is to propose an accurate method for predicting the radial runout of inner ring based on the geometrical constraint model of cylindrical roller bearings. In the geometrical constraint model, dimension and form errors in the inner raceway, the outer raceway, and rollers are considered, and the change of contact positions between the raceways and rollers caused by geometric errors of bearing components is taken into account. This method could predict the radial runout of inner ring after bearing components with geometric error are assembled. In order to testify the validity of the proposed prediction method, two particular cases in which the profiles of the inner raceway are circle and ellipse are selected, and the analysis algorithms for the radial runout of inner ring are derived. Two analytical results obtained from the analysis algorithms validate accuracy and effectiveness of the proposed prediction method.