New method for measuring ball-bearing raceway radii

1964 ◽  
Vol 7 (3) ◽  
pp. 208-210
Author(s):  
D. I. Kolpakov ◽  
V. V. Matveev
Keyword(s):  
Ball Bearing ◽  
New Method ◽  
Bearing Raceway

Stress Field Evolution in a Ball Bearing Raceway Fatigue Spall

2010 ◽  
pp. 57-57-24 ◽  
Author(s):  
Nathan A. Branch ◽  
Nagaraj K. Arakere ◽  
Vaughn Svendsen ◽  
Nelson H. Forster
Keyword(s):  
Stress Field ◽  
Ball Bearing ◽  
Field Evolution ◽  
Bearing Raceway

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.

Estimation of the Surface Roughness on the Race or Balls of Ball Bearings by Vibration Analysis

1987 ◽  
Vol 109 (1) ◽  
pp. 60-68 ◽  
Author(s):  
H. Kanai ◽  
M. Abe ◽  
K. Kido
Keyword(s):  
Surface Roughness ◽  
Vibration Analysis ◽  
Diagnostic Method ◽  
Ball Bearing ◽  
Vibration Signal ◽  
Short Length ◽  
New Method ◽  
Ball Bearings ◽  
Accuracy Rate ◽  
Percent Accuracy

This paper describes a vibration-based diagnostic method by estimating the surface roughness on the rotating ring or balls in ball bearings. The surface roughness has been measured by a stylus that directly traverses the surface of the ring or balls obtained by taking apart the ball bearing. We developed a new method to estimate accurately the surface roughness by analyzing the short-length vibration signal that is excited when balls encounter flaws on the rotating ring or when races encounter flaws on the balls in a ball bearing. Our experimental results confirm that the roughness estimated by the proposed method agrees with that measured directly by using a stylus even in the case of crack μm wide. We applied this new method to the diagnosis of surface roughness in small-sized ball bearings and inferior samples were detected with a 95.3 percent accuracy rate.

scholarly journals Stress-Based Weibull Method to Select a Ball Bearing and Determine Its Actual Reliability

2020 ◽  
Vol 10 (22) ◽  
pp. 8100
Author(s):  
Baldomero Villa-Covarrubias ◽  
Manuel R. Piña-Monarrez ◽  
Jesús M. Barraza-Contreras ◽  
Manuel Baro-Tijerina
Keyword(s):  
Weibull Distribution ◽  
Standard Method ◽  
Ball Bearing ◽  
Contact Stresses ◽  
New Method ◽  
Hertz Contact ◽  
Outer Race ◽  
Two Parameters

Since the designed bearing’s reliability of 90% was determined in a lab environment, it does not represent the actual used environment. In this paper, a new methodology to determine the actual reliability that corresponds to the use conditions is offered. This new method is based on the standard method used to select the ball bearing. The proposed method is based on the two parameters of Weibull distribution, where the shape (β) and scale (η) parameters are both determined from the Hertz contact stresses values, which are generated under the surface of the motionless outer race, and by the forces transmitted between the ball and the outer race. Therefore, the derived reliability is different from the 90% index offered by manufacturers.

Comparing of Temperatures of Rolling Bearing under the Oil-Air Lubrication to the Spray Lubrication

2013 ◽  
Vol 395-396 ◽  
pp. 763-768 ◽  
Author(s):  
Qi Guo Sun ◽  
Yue Fei Wang ◽  
Ying Wang ◽  
Hong Bo Lv
Keyword(s):  
Rotational Speed ◽  
Ball Bearing ◽  
Convective Heat Transfer Coefficient ◽  
Rolling Bearing ◽  
High Rotational Speed ◽  
Geometry Model ◽  
Deep Groove ◽  
Deep Groove Ball Bearing ◽  
Air Lubrication ◽  
Bearing Raceway

The heat generating mechanism inside the cavity of rolling bearing is analyzed and the convective heat transfer coefficient of bearing raceway surface in different rotational speed is calculated under the oil-air lubrication and the spray lubrication in this paper. The fluid domain geometry model of deep groove ball bearing SKF6208 is established, employing the flow field module in Workbench. The comparing simulations of the temperatures of rolling bearing cavity under the oil-air lubrication to the spray lubrication are done in different rotational speed. The simulation results show that the highest temperature of bearing cavity with the oil-air lubrication is almost the same to the spray lubrication when the bearing rotational speed is lower, and the highest temperature of bearing cavity with the oil-air lubrication is far lower than the spray lubrication when the bearing rotational speed is higher. Those conclusions verify the advantages of the oil-air lubrication in high rotational speed.

A new method for determining the preload in a wire race ball bearing

2007 ◽  
Vol 40 (5) ◽  
pp. 869-875 ◽  
Author(s):  
Xiaobiao Shan ◽  
Tao Xie ◽  
Weishan Chen
Keyword(s):  
Ball Bearing ◽  
New Method

Interferometer for measuring the surface shape of a ball bearing raceway

1985 ◽  
Vol 24 (22) ◽  
pp. 3791 ◽  
Author(s):  
Kenji Nunome ◽  
Manabu Tsukamoto ◽  
Toyohiko Yatagai ◽  
Hiroyoshi Saito
Keyword(s):  
Ball Bearing ◽  
Surface Shape ◽  
Bearing Raceway

Pitch bearing/raceway fretting: Influence of contact angle

2018 ◽  
Vol 233 (5) ◽  
pp. 1734-1749 ◽  
Author(s):  
Peiyu He ◽  
Rongjing Hong ◽  
Hua Wang ◽  
Cheng Lu
Keyword(s):  
Contact Angle ◽  
Maximum Stress ◽  
Ball Bearing ◽  
Three Dimensional ◽  
Contact Angles ◽  
Critical Parameters ◽  
Relative Slip ◽  
Contact State ◽  
Pitch Bearing ◽  
Bearing Raceway

In this paper, a three-dimensional numerical simulation (using ABAQUS) of the radial and tangential wear between a ball bearing and a raceway is presented. The aim was to study the influence of the contact angle between ball and raceway on the fretting. A range of contact angles was studied with critical parameters such as contact stress, relative slip, plastic deformation, and contact state. The model was validated against experimental data. The results show that with an increase in the contact angle, the area of maximum stress increases, the bearing capacity of the raceway decreases, and the maximum radial stress moves from the sub-surface to the raceway surface. The raceway surface is shown to be prone to peeling and wear, which reduces the service life of the raceway.

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