Experimental and theoretical approaches for determining cage motion dynamic characteristics of angular contact ball bearings considering whirling and overall skidding behaviors

2022 ◽  
Vol 168 ◽  
pp. 108704
Author(s):  
Shuai Gao ◽  
Qinkai Han ◽  
Ningning Zhou ◽  
Paolo Pennacchi ◽  
Steven Chatterton ◽  
...  
Keyword(s):  
Dynamic Characteristics ◽  
Ball Bearings ◽  
Theoretical Approaches

Dynamic Characteristics of Motorized Spindle With Tandem Duplex Angular Contact Ball Bearings

2019 ◽  
Vol 141 (6) ◽  
Author(s):  
Shengye Lin ◽  
Shuyun Jiang
Keyword(s):  
Transfer Matrix ◽  
Dynamic Characteristics ◽  
Transfer Matrix Method ◽  
Matrix Method ◽  
Ball Bearing ◽  
Ball Bearings ◽  
Motorized Spindle ◽  
Angular Contact Ball Bearing ◽  
Stiffness Coefficients ◽  
Proposed Model

Abstract The purpose of this study is to investigate the dynamics of motorized spindle, in which the tilting effect of tandem duplex angular contact ball bearing is considered. First, the quasi-static model of the duplex angular contact ball bearing is developed based on the Jones's bearing model. Then, the model is numerically solved using the Newton–Raphson method to obtain 16 stiffness coefficients (including the tilting ones). Later, a modified transfer matrix method is used to establish the dynamic model of the motorized spindle system with 16 stiffness coefficients. Finally, experiments have been performed to detect the stiffness of the tandem duplex angular contact ball bearing and the unbalance response of the motorized spindle. Results show that the modified transfer matrix method can be used to analyze the dynamic behavior of the motorized spindle supported on tandem duplex angular contact ball bearings, the tilting effect of the tandem duplex angular contact ball bearing affects the dynamic behaviors of the motorized spindle, and the theoretical dynamic characteristics using the proposed model agree with the experimental ones.

Damping the Vibrations of a Rigid Shaft Supported by Ball Bearings by Means of External Elastomeric O-ring Dampers

1994 ◽  
Vol 208 (3) ◽  
pp. 183-190 ◽  
Author(s):  
N Aktürk ◽  
R Gohar
Keyword(s):  
Computer Program ◽  
Frequency Response ◽  
Dynamic Characteristics ◽  
Ball Bearing ◽  
Ball Bearings ◽  
Axial Vibration ◽  
Response Curves ◽  
Elastomeric Dampers

In this paper the radial and axial vibration behaviour of a rigid shaft supported by a pair of back-to-back angular contact ball bearings, mounted on elastomeric O-ring dampers, is studied. The use of elastomeric dampers for reducing the untoward effects of vibrations, due to unbalance of the shaft centre, is investigated. A computer program was developed to simulate such situations with the results presented in the form of frequency response curves and shaft centre orbits. All results showed that elastomeric O-ring dampers can successfully be used for shaft-ball bearing systems as long as the dynamic characteristics of both the system and the elastomeric O-rings are known very well.

Dynamic Characteristics of Hard Disk Drive Spindle Motors—Comparison Between Ball Bearings and Hydrodynamic Bearings

1996 ◽  
Vol 118 (2) ◽  
pp. 402-406 ◽  
Author(s):  
C.-P. Roger Ku
Keyword(s):  
Hard Disk Drive ◽  
Data Storage ◽  
Dynamic Characteristics ◽  
Low Frequency ◽  
Hard Disk ◽  
Axial Direction ◽  
Disk Drive ◽  
Spindle Motor ◽  
Damping Capacity ◽  
Ball Bearings

Recently, many computer hard disk drive companies and spindle motor manufacturers have been looking for a substitute for ball bearings to continue making dramatic progress in increasing the capacity of data storage systems. In this paper, the frequency-forced responses of hard disk drive spindle motors supported by both ball bearings and liquid-lubricated spiral groove hearings (SGBs) were studied experimentally. It is found that both shaft rigidity and disk flexibility have great effects on the natural frequency of the spindle motor conical (rocking) mode. The high damping capacity of the SGB is able to suppress the vibration amplitudes of both motor rocking mode and the flexible disk modes. But at a very low frequency range, the SGB motors displayed a large amplitude in the axial direction vibration test. With an adequate bearing design, the SGB motors have proven their superior dynamic characteristics.

Dynamic characteristics of high speed angular contact ball bearings

Wear ◽  
1997 ◽  
Vol 211 (1) ◽  
pp. 22-29 ◽  
Author(s):  
G.D. Hagiu ◽  
M.D. Gafitanu
Keyword(s):  
Dynamic Characteristics ◽  
High Speed ◽  
Ball Bearings

An adjustable bearing seat stiffness element for targeted vibration influencing

2021 ◽  
Vol 263 (6) ◽  
pp. 757-766
Author(s):  
Carolin Sturm ◽  
Andreas Lindenmann ◽  
Thomas Gwosch ◽  
Sven Matthiesen
Keyword(s):  
Dynamic System ◽  
Dynamic Characteristics ◽  
High Speed ◽  
Design Space ◽  
Testing Machine ◽  
Technical System ◽  
System Behavior ◽  
Load Range ◽  
Theoretical Approaches ◽  
Universal Testing

In order to be able to influence the dynamic system behavior in a targeted manner, parameters such as stiffness in the technical system must be adjustable. In high-speed powertrains, the stiffness of the bearing seat, in particular, has an influence on the dynamic characteristics. As part of our research, we developed an adjustable bearing seat stiffness element. The focus of research was on an adjustable, scalable element with a small design space and the same properties over the perimeter. We characterized it statically with the help of a universal testing machine and dynamically using a shaker system. The results are compared with theoretical approaches. The results show that the stiffness is almost linearly adjustable in the load range of 0-100N. The results indicate that the developed element can be used to adjust desired stiffness and thus to influence vibrations in a targeted manner. The findings can be used in the design of high-speed powertrains e.g. in serial products or test benches.

An Approach to Investigate Dynamic Parameters of Bearings Joint Surfaces Based on the SDOF System

2013 ◽  
Vol 470 ◽  
pp. 504-509
Author(s):  
Lian Bao Wang ◽  
Xiao Qiu Hu ◽  
Xiang Long Dong
Keyword(s):  
Dynamic Characteristics ◽  
Hot Spot ◽  
Dynamic Stiffness ◽  
Modal Testing ◽  
Ball Bearings ◽  
Dynamic Parameters ◽  
Cnc Machine ◽  
Sdof System ◽  
Joint Surfaces ◽  
Stiffness And Damping

As commonly supporting parts of the spindle and the feed systems on the high-end grade CNC machine tool, the dynamic characteristics of angular contact ball bearings had been a research hot spot in the current. Aiming at solving the problem that obtained dynamic stiffness and damping of angular contact ball bearings, an approach to investigate dynamic parameters of bearings joint surfaces was proposed based on the single degree of freedom (SDOF) system, and several groups of modal testing were carried out. The dynamic characteristics of bearings joint surfaces were viewed as several viscoelastic units of spring and damper. Then, models of bearings dynamic parameters in the axial and radial directions were established, and several groups of modal simulation were carried out. The comparison of experiment and simulation results showed that the proposed approach could accurately identify dynamic stiffness and damping of bearings under different load conditions, and the errors were controlled within 7.6%.

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