scholarly journals Three-Dimensional DEM Modelling of Ball Bearing with Lubrication Regime Prediction

Lubricants ◽  
2018 ◽  
Vol 6 (2) ◽  
pp. 46 ◽  
Author(s):  
Mohamed Guessasma ◽  
Charles Machado
Keyword(s):  
Ball Bearing ◽  
Three Dimensional ◽  
Lubrication Regime

Three-Dimensional Air Flow Patterns Within a Rotating Ball Bearing

2013 ◽  
Vol 19 (8) ◽  
pp. 2180-2183 ◽  
Author(s):  
Il-Seok Oh ◽  
Dongjoo Kim ◽  
Seong-Wook Hong ◽  
Kyoungjin Kim
Keyword(s):  
Ball Bearing ◽  
Air Flow ◽  
Three Dimensional ◽  
Flow Patterns

A New Method for the Analysis of Deformation and Load in a Ball Bearing With Variable Contact Angle

1999 ◽  
Vol 123 (2) ◽  
pp. 304-312 ◽  
Author(s):  
Neng Tung Liao ◽  
Jen Fin Lin
Keyword(s):  
Contact Angle ◽  
Elastic Deformation ◽  
Newton Method ◽  
Contact Surface ◽  
Ball Bearing ◽  
Three Dimensional ◽  
Position Angle ◽  
New Method ◽  
Mechanism Analysis ◽  
Acting Force

The contact angle of a ball in a ball bearing is conventionally assumed to be a constant value in the mechanism analysis; in reality, this is not true. This assumption is made for the purpose of simplifying calculations, but the real elastic deformation produced at the position of each ball due to the acting force varying with the contact angle is unable to be considered. This study tries to establish a simple, three-dimensional expression for the elastic deformation at different position angles in terms of the geometry of the contact surface at the inner and outer races. Simply using the Newton method when the bearing deformations in the radial and axial directions are available can solve the contact angle as a function of position angle. Several characteristics arising from the variable contact angle will be discussed.

Porous Retainers for Rolling Bearings

1981 ◽  
Vol 23 (6) ◽  
pp. 263-271
Author(s):  
R. Gohar ◽  
H. So
Keyword(s):  
Ball Bearing ◽  
Porous Matrix ◽  
Critical Value ◽  
Eccentricity Ratio ◽  
Rolling Bearings ◽  
High Coefficient ◽  
Lubrication Regime ◽  
Permeability Parameter ◽  
Mixed Film ◽  
Film Lubrication

A theoretical analysis is made for the lubrication of ball bearing retainers made of porous material. The results show that at low Sommerfeld reciprocals, the eccentricity ratio tends to unity with a high coefficient of friction. At a certain critical value of the reciprocal, a minimum friction occurs, thereafter followed by hydrodynamic operation. The critical value depends on the permeability parameter of the porous matrix and increases with its porosity. Experiments suggest that at low Sommerfeld reciprocals or with the oil supply coming only from the retainer pores, mixed film lubrication occurs, friction being less than that obtained theoretically. Such a lubrication regime would still allow sufficient oil to be carried by the balls to the races for their lubrication.

Influence of Groove Slotting for Micro-Sensor Embedding on Smart Bearing's Mechanical Characteristics

2005 ◽  
Vol 297-300 ◽  
pp. 562-566
Author(s):  
Hang Gao ◽  
Qing Lv ◽  
Li Gang Qu
Keyword(s):  
Maximum Stress ◽  
Mechanical Characteristics ◽  
Ball Bearing ◽  
Three Dimensional ◽  
Groove Depth ◽  
Mechanics Model ◽  
Micro Sensor ◽  
Bearing Design ◽  
Reasonable Choice ◽  
Stress And Deformation

It is necessary to slot a groove on the outside of the bearing’s raceway in order to embed micro-sensor for smart bearing. Reasonable choice of slotting parameters for different type of bearings is one of key problems to be solved in smart bearing design. In this paper three-dimensional solid model and corresponding mechanics model for a segment of ball bearing’s out ring are built according to some reasonable simplification and supposition of boundary condition and loading status. Further more the influence of slotting parameters on smart bearing’s mechanical characteristics is studied with FEA method. Choosing 220 type of ball bearing as an example, theoretical analysis results of influence of slotting parameters on the maximum stress and deformation of outer ring are shown. The FEA results showed that micro-sensors for smart bearings should be manufactured flatter or the groove depth for micro-sensor embedding should be smaller soon as possible in order to insure the smart bearing’s original mechanical rigidity and strength.

Multiple Defects Detection in Outer Race of Gearbox Ball Bearing Using Time Domain Statistical Parameters

2016 ◽  
Vol 8 (3) ◽  
Author(s):  
A. Nabhan ◽  
A.M. Sami ◽  
M.O. Mousa ◽  
M. Nouby
Keyword(s):  
Ball Bearing ◽  
Three Dimensional ◽  
Simulated Data ◽  
Three Dimensional Model ◽  
Statistical Parameters ◽  
Outer Race ◽  
Multiple Defects ◽  
Single Defect ◽  
Deep Groove ◽  
Local Defects

Multiple defects are introduced on the outer race of vehicle gearboxes. The effect of the number of outer race defects in deep groove ball bearings are investigated using experimental and numerical methods. A three-dimensional model of the housing and outer race is developed using ABAQUS. Firstly, single defect located at 0˚and two defects located at 0˚ and 67.5˚ are analyzed. Then the number of defects was increased to three and the locations of the local defects are 0˚, 67.5˚ and 225˚. Finally the model with four defects located on the outer race at the angular positions 0˚, 67.5˚, 225˚ and 270˚, was investigated. The simulated data were also used to validate the experimental results.

Parametric Design of Deep Groove Ball Bearing Based on Pro/Program and Family Table

2014 ◽  
Vol 721 ◽  
pp. 113-117
Author(s):  
Nai Ming Miao
Keyword(s):  
Ball Bearing ◽  
Parametric Design ◽  
Three Dimensional ◽  
Rolling Bearing ◽  
Design Environment ◽  
Improve Design ◽  
Three Dimensional Modeling ◽  
Dimensional Modeling ◽  
Deep Groove ◽  
Deep Groove Ball Bearing

Due to the same series of rolling bearing standard part with the same topology structure and different dimension parameters, a series of rolling bearing products can be designed by parametric design method. Based on the development tool of Pro/Program and family table combined with three-dimensional modeling, this paper takes deep groove ball bearing for example to discuss the means and steps of rolling bearing parametric design. By entering the relevant parameters, such as the bearing outside diameter, bearing inside diameter, bearing width, ball number and other known conditions, we can accurately and quickly generate a new rolling bearing solid model. The result shows that in the design environment of Pro/ENGINEER, using parametric design to make three-dimensional modeling can shorten design cycle time and improve design efficiency significantly.

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