scholarly journals Discussion: “Transient Ball Motion and Skid in Ball Bearings” (Gupta, P. K., 1975, ASME J. Lubr. Technol., 97, pp. 261–269)

1975 ◽  
Vol 97 (2) ◽  
pp. 269-269
Author(s):  
A. Gu
Keyword(s):  
Ball Bearings ◽  
Ball Motion

Prediction of Ball Motion in High-Speed Thrust-Loaded Ball Bearings

1976 ◽  
Vol 98 (3) ◽  
pp. 463-469 ◽  
Author(s):  
C. R. Gentle ◽  
R. J. Boness
Keyword(s):  
Computer Program ◽  
High Speed ◽  
Ball Bearing ◽  
Viscoelastic Behavior ◽  
Specific Situation ◽  
Fluid Models ◽  
Ball Bearings ◽  
Theoretical Predictions ◽  
Ball Motion

This paper describes the development of a computer program used to analyze completely the motion of a ball in a high-speed, thrust-loaded ball bearing. Particular emphasis is paid to the role of the lubricant in governing the forces and moments acting on each ball. Expressions for these forces due to the rolling and sliding of the ball are derived in the light of the latest fluid models, and estimates are also made of the cage forces applicable in this specific situation. It is found that only when lubricant viscoelastic behavior is considered do the theoretical predictions agree with existing experimental evidence.

Oscillatory Occurrences in Ball Bearings

1952 ◽  
Vol 56 (504) ◽  
pp. 885-908 ◽  
Author(s):  
M. S. Frenkel
Keyword(s):  
Ball Bearing ◽  
Maximum Speed ◽  
System Of Equations ◽  
Ball Bearings ◽  
Angular Contact Ball Bearing ◽  
Simple Motion ◽  
Ball Motion

In this paper it is shown how, in an angular contact ball bearing, the motion of a ball depends on the dimensions, loading and speed of the bearing. In general, ball motion in an angular contact bearing differs from the simple motion usually visualised by including oscillatory occurrences, shown here analytically, graphically and visually. These oscillatory occurrences are shown to lead to premature fatigue of the bearing metal, as a function of the speed of rotation, thereby imposing the present limitations on maximum speed and “ life.”It is further shown that only when the dimensions of an angular contact ball bearing are related in a certain way, a motion is produced in which the oscillatory phenomena are eliminated. These relations are given as functions of loading and speed in a system of equations and limiting conditions (hereafter referred to as “ Relations of the Dimensions ”).

A new method for the study of ball motion in ball bearings

Wear ◽  
1981 ◽  
Vol 69 (2) ◽  
pp. 241-248 ◽  
Author(s):  
K. Kawakita ◽  
J. Halling
Keyword(s):  
New Method ◽  
Ball Bearings ◽  
Ball Motion

An Improved Model for Nonplanar Contact Sliding in Ball Bearings

1994 ◽  
Vol 116 (2) ◽  
pp. 219-224 ◽  
Author(s):  
P. I. Tzenov ◽  
T. S. Sankar
Keyword(s):  
Contact Area ◽  
Friction And Wear ◽  
Ball Bearing ◽  
Wear Test ◽  
Test Machine ◽  
Ball Bearings ◽  
Sliding Velocity ◽  
Angular Contact Ball Bearing ◽  
Improved Model ◽  
Ball Motion

This investigation focuses on the contact interaction between a ball and a torus ring as in ball bearings. The sliding velocity field at the nonplanar contact area is analyzed and the resulting friction force and moment are determined assuming same friction coefficient at any point of the contact area. The results are illustrated by an application case to an angular contact ball bearing. The procedure developed through an appropriate computer simulation is useful in ascertaining the steady-state motion of a ball in ball bearings, in friction-and-wear test machine, etc. The results contribute to a better understanding of the nature of friction phenomena and the ball motion controlled by these phenomena. They also provide data on sliding and amount of wear at the contact areas, as well as lubricant degradation.

Ball Motion and Sliding Friction in Ball Bearings

1959 ◽  
Vol 81 (1) ◽  
pp. 1-12 ◽  
Author(s):  
A. B. Jones
Keyword(s):  
High Speed ◽  
Sliding Friction ◽  
Interfacial Slip ◽  
Ball Bearings ◽  
Angular Contact Ball Bearing ◽  
Friction Forces ◽  
Inertia Effects ◽  
Closed Form Solutions ◽  
Gyroscopic Effects ◽  
Ball Motion

In modern high-speed ball bearings the pressure areas, which result from elastic deformations at the ball-race contacts, are appreciably curved and interfacial slip can occur at most points within the pressure areas. These slippages give rise to friction forces acting on the ball which are held in equilibrium by reactions from the races and the inertia effects of the motion of the ball. A method is derived for determining the motion of the ball and sliding friction in a high-speed, angular-contact ball bearing under thrust load in terms of the inertia effects on the ball and the frictional resistances resulting from interfacial slip at the contact areas. Possible elastic compliance at the interface, hysteresis, and dynamical perturbations of ball motion are neglected. The solution of eight, simultaneous equations involving double integrals for which closed-form solutions cannot be found is required. A solution for a particular case requires the services of a high-speed computer. For the case where gyroscopic effects on the ball can be neglected, certain simplifications and assumptions can be made which enable the solution of a particular problem using conventional computation means.

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