Radial load distribution by balls in a ball bearing with variable clearance

2021 ◽  
pp. 1-26
Author(s):  
Ravi Sinha ◽  
Vineet Sahoo ◽  
Manikant Paswan
Keyword(s):  
Load Distribution ◽  
Ball Bearing ◽  
Radial Load

Mathematical Modeling and Experimental Verification of the Radial Stiffness for a Wire Race Ball Bearing

2011 ◽  
Vol 120 ◽  
pp. 343-348 ◽  
Author(s):  
Xiao Biao Shan ◽  
Li Li Wang ◽  
Tao Xie ◽  
Wei Shan Chen
Keyword(s):  
Mathematical Modeling ◽  
Load Distribution ◽  
Ball Bearing ◽  
Contact Dynamics ◽  
Radial Load ◽  
Rotary Table ◽  
Radial Stiffness ◽  
In Series ◽  
Compression Springs ◽  
Theoretical Results

This paper firstly presented a mathematical model of the radial stiffness of a wire race ball bearing in a certain type of three-axis aircraft simulating rotary table. The Stribeck theory was used to determine the radial load distribution of the bearing. By treating the contact between balls and wires as equivalent compression springs, the relationships of these springs in series and parallel can be obtained to solve the total radial stiffness. Experiments verified the theoretical results of the radial stiffness. This work provides an effective support for further studying the complex contact dynamics of the wire race ball bearing in the future.

Analytical determination of the optimal clearance for the fatigue life of ball bearing under different load conditions

2021 ◽  
pp. 1-28
Author(s):  
Bin Fang ◽  
Jinhua Zhang
Keyword(s):  
Fatigue Life ◽  
Load Distribution ◽  
Life Prediction ◽  
Ball Bearing ◽  
Operating Conditions ◽  
Analytical Determination ◽  
Parameters Selection ◽  
Bearing Life ◽  
Structural Design Optimization ◽  
Load Conditions

Abstract In this paper, a comprehensive analytical model for the fatigue life prediction of ball bearing in various operating conditions is presented. Not only the internal clearance variations induced by the centrifugal expansion and assembly interference, but also ball inertia forces and ball-raceway separations are fully considered in theoretical modeling to achieve accurate life prediction of ball bearing. The model has been validated by comparison with the static results in previous literature. Based on this, the results of the load distribution and fatigue life versus the internal clearance of ball bearing under various operating conditions are studied. The results show that there is always an optimal clearance to maximize bearing fatigue life for the radial load or the combined load conditions, and the size of the optimal clearance for bearing life is determined by both the load conditions and rotating speeds to ensure the uniformity of the internal load distribution of the ball bearing. Therefore, the above theoretical and conclusions can be used in structural design optimization and assembly parameters selection of ball bearing to maximize the life characteristic.

Load Analysis of Flexible Ball Bearing in a Harmonic Reducer

2019 ◽  
Vol 142 (2) ◽  
Author(s):  
Ying Xiong ◽  
Yongsheng Zhu ◽  
Ke Yan
Keyword(s):  
Finite Element Method ◽  
Load Distribution ◽  
Ball Bearing ◽  
Design Parameters ◽  
Force Action ◽  
Analysis Model ◽  
Proposed Model ◽  
Action Type ◽  
High Reduction ◽  
Load Analysis

Abstract Harmonic reducers are generally supported by flexible bearings. The elastic deformation of the flexible bearing enables the harmonic reducer to satisfy high reduction ratio performance. By considering the flexible outer ring and noncircular inner ring of the flexible bearing, a universal static analysis model was developed to calculate the ball load distribution of flexible bearings in harmonic reducers. The validity of the proposed model was proved by studying two types of flexible bearings mounted on an elliptical cam and a four-force action-type cam, respectively. Several results validate the use of the model to assess the ball load distribution instead of a more time-consuming finite element method. Influences of design parameters in the flexible bearing on the load distribution were investigated, which makes reference for the optimal design of the flexible bearing.

scholarly journals EFFECT OF RADIAL FORCE ON BALL BEARING STIFFNESS FACTOR UNDER CONDITIONS OF RING SKEW

2021 ◽  
Vol 6 (4) ◽  
pp. 6-10
Author(s):  
Il'dar S. Barmanov
Keyword(s):  
Significant Influence ◽  
Ball Bearing ◽  
Radial Force ◽  
Radial Load ◽  
Radial Stiffness ◽  
Bearing Stiffness ◽  
Bearing Rings

Results of ball bearing rings skew effect on radial stiffness factor are pre-sented in the paper. The effect of radial load on stiffness factor at change of angles of rings skew was evaluated. Significant influence of bearing rings skew on stiffness factor at small radial load values is noted.

Cage Instabilities in High-Speed Ball Bearings

2013 ◽  
Vol 278-280 ◽  
pp. 3-6 ◽  
Author(s):  
Zhen Huan Ye ◽  
Li Qin Wang
Keyword(s):  
Dynamic Model ◽  
Axial Load ◽  
High Speed ◽  
Ball Bearing ◽  
Rotation Speed ◽  
Ball Bearings ◽  
Radial Load ◽  
Mass Center ◽  
Clearance Ratio ◽  
Force Relationship

The dynamic model of the cage in high-speed ball bearing was developed according to the geometry and force relationship between bearing elements. Based on this dynamic model, cage instability was researched through mass center whirl. The effect of clearance ratio, load and bearing rotation speed on cage instability were studied by taking type 7004 angular ball bearing as an example. The results shown that the increase of clearance ratio and radial load makes cage stability lowered, and the cage stability could be enhanced by increasing the axial load and bearing rotation speed.

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