Animated Computer Graphics of Rolling Bearing Dynamics.

1996 ◽  
Author(s):  
Pradeep K. Gupta
Keyword(s):  
Computer Graphics ◽  
Rolling Bearing ◽  
Bearing Dynamics

scholarly journals A Study on Bearing Dynamic Features under the Condition of Multiball–Cage Collision

Lubricants ◽  
2022 ◽  
Vol 10 (1) ◽  
pp. 9
Author(s):  
Shuaijun Ma ◽  
Xiaohong Zhang ◽  
Ke Yan ◽  
Yongsheng Zhu ◽  
Jun Hong
Keyword(s):  
Impact Force ◽  
Dynamic Performance ◽  
Rolling Bearing ◽  
Acceleration Process ◽  
Radial Load ◽  
Dynamic Features ◽  
Rolling Elements ◽  
Bearing Raceway ◽  
Bearing Dynamics ◽  
Peak Impact Force

Cage stability directly affects the dynamic performance of rolling bearing, which, in turn, affects the operating state of rotating equipment. The random collision between the rolling elements and the cage pocket is the main reason for cage instability. In this paper, from the perspective of the relative sliding velocity between the rolling elements and the bearing raceway, the interactions of the rolling elements and the cage pockets were analyzed, and the four zones with different collision features were defined. On this basis, and on the basis of the bearing dynamics model, the interaction of two adjacent rolling elements and the cage pockets in the a’–b’ area is discussed, and the peak impact force of the adjacent two balls and the cage pockets was investigated in terms of the rotation speed, radial load, acceleration/deceleration, and materials. When the ball runs close to the loaded zone, the probability of multiball random collision increases, which leads to an increase in the cage instability. At the entrance of the loaded zone, the peak impact force has the greatest impact on the cage stability during the acceleration process. Compared to the radial load applied to the bearing, the peak impact force is more sensitive to the bearing speed changes. The multiball collision analysis method provides a new idea for the research of cage stability.

scholarly journals Nonlinear Dynamics Analysis of a Rolling Bearing

2021 ◽  
Vol 54 (1) ◽  
pp. 21-26
Author(s):  
Arkadiusz Smagala ◽  
Krzysztof Kecik
Keyword(s):  
Degrees Of Freedom ◽  
Rolling Bearing ◽  
Point Of View ◽  
Shaft Speed ◽  
Response Mechanism ◽  
Vibration Direction ◽  
Hertz Theory ◽  
Ball Number ◽  
Clearance Level ◽  
Bearing Dynamics

A numerical analysis of the nonlinear bearing model about two degrees of freedom has been presented in this paper. The contact between a ball and ring by Hertz theory is described. Influence of the number of balls, shaft rotation and clearance on the acceleration were investigated in detail. Three numbers of balls from 11 to 16 were analyzed. The clearance level in the range of 0-71μm has been studied. It has been shown that the acceleration responses are different, depending on the vibration direction and are usually higher when the radial internal clearance and the shaft speed are increased. The higher ball number caused that the accelerations decreased in both directions. Moreover, two dynamic indicators that can be used for comparison bearing dynamics have been proposed. These obtained results are useful for understanding the vibration response mechanism from a practical point of view.

Mehrkörpersimulation als Werkzeug zur Analyse der Wälzlagerdynamik/Investigation of Rolling Bearing Dynamics with Multibody-Simulation

Konstruktion ◽  
2017 ◽  
Vol 69 (10) ◽  
pp. 91-98
Author(s):  
Timo Kiekbusch ◽  
Balázs Magyar
Keyword(s):  
Rolling Bearing ◽  
Multibody Simulation ◽  
Bearing Dynamics

Inhalt: Die Dynamiksimulation von Wälzlagern auf Basis der Mehrkörpersimulation (MKS) ist ein mächtiges Werkzeug zur Analyse dieses Maschinenelementes unter verschiedensten Bedingungen. Sie eröffnet insbesondere für die sichere Auslegung in der Systemumgebung Möglich-keiten, die weit über die genormten Auslegungsverfahren hinausgehen. Dieser Beitrag stellt die am MEGT verwendeten Modellgrundlagen vor und gibt eine Übersicht über die Möglichkeiten der Dynamikmodelle. Die Autoren widmen diesen Beitrag Prof. Dr.-Ing. Bernd Sauer zu seinem 60. Geburtstag. Prof. Sauer hat als junger Professor die Bedeutung dieses Forschungsfeldes erkannt und während seiner akademischen Laufbahn deren Entwicklung stets vorangetrieben.

Rolling Bearing Life Prediction-Correction for Materials and Operating Conditions—Part III: Implementation in Bearing Dynamics Computer Codes

1990 ◽  
Vol 112 (1) ◽  
pp. 23-26 ◽  
Author(s):  
P. K. Gupta ◽  
T. E. Tallian
Keyword(s):  
Life Prediction ◽  
Computer Code ◽  
Rolling Bearing ◽  
Operating Conditions ◽  
Correction Factors ◽  
Rolling Bearings ◽  
Bearing Life ◽  
Computer Codes ◽  
Bearing Dynamics ◽  
Cylindrical Roller

Models for the correction of classical fatigue life for material imperfections and severity of operating conditions in rolling bearings are implemented in a bearing dynamics computer code. The significance of life correction factors is then demonstrated for both ball and cylindrical roller bearings over a range of operating conditions.

Dynamics of Bearing Shaft Systems

2005 ◽  
Author(s):  
Farshid Sadeghi ◽  
Carl Wassgren ◽  
Nicholas Prenger ◽  
Niranjan Ghaisas ◽  
Eric Chamberlain
Keyword(s):  
Rolling Bearing ◽  
Rolling Element Bearings ◽  
Loading Conditions ◽  
Rotating Shaft ◽  
Type Analysis ◽  
Rolling Element ◽  
Rolling Elements ◽  
Bearing Dynamics ◽  
Bearing System

The objective of this study was to develop a bearing model which can be combined with shafts, gears etc. to virtually investigate the motion and loading of the elements in the bearing. Models for ball, cylindrical and tapered rolling bearing dynamics have been designed, developed and combined with rigid and flexible shafts subject to various loading conditions and eccentric masses. The results from this investigation demonstrated that for rotating shaft bearing systems, the motion and the loads on the rolling elements are significantly different than that predicted by static and / or quasi-static type analysis. Results from shaft bearing system, where shaft may be supported by combinations of ball and rolling element bearings will be demonstrated. Cage motion and stability under various load and speed combinations will be discussed.

Improved 3-D reconstruction using stereo computer graphics and multiple tilt EM images

1995 ◽  
Vol 53 ◽  
pp. 630-631
Author(s):  
Lee D. Peachey ◽  
Lou Fodor ◽  
John C. Haselgrove ◽  
Stanley M. Dunn ◽  
Junqing Huang
Keyword(s):  
Computer Graphics ◽  
High Performance ◽  
Transverse Section ◽  
Three Dimensional ◽  
Stereo Pair ◽  
3D Reconstructions ◽  
Video Cameras ◽  
Biological Objects ◽  
Microscope Images ◽  
High Performance Computer

Stereo pairs of electron microscope images provide valuable visual impressions of the three-dimensional nature of specimens, including biological objects. Beyond this one seeks quantitatively accurate models and measurements of the three dimensional positions and sizes of structures in the specimen. In our laboratory, we have sought to combine high resolution video cameras with high performance computer graphics systems to improve both the ease of building 3D reconstructions and the accuracy of 3D measurements, by using multiple tilt images of the same specimen tilted over a wider range of angles than can be viewed stereoscopically. Ultimately we also wish to automate the reconstruction and measurement process, and have initiated work in that direction.Figure 1 is a stereo pair of 400 kV images from a 1 micrometer thick transverse section of frog skeletal muscle stained with the Golgi stain. This stain selectively increases the density of the transverse tubular network in these muscle cells, and it is this network that we reconstruct in this example.

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