Simulation and Experimental Validation of Tapered Roller Bearing Vibration Induced by Geometrical Imperfection on Cup Raceway

2014 ◽  
Author(s):  
Desheng Li ◽  
Young Sup Kang
Keyword(s):  
Test Data ◽  
Roller Bearing ◽  
Three Dimensional ◽  
Surface Profile ◽  
Elastohydrodynamic Lubrication ◽  
Hertzian Contact ◽  
Test Machine ◽  
Vibration Model ◽  
Tapered Roller ◽  
Bearing Vibration

A three dimensional non-linear vibration model of tapered roller bearings was developed based on an in-house dynamic bearing model (DBM), which simulates the motion of bearing components and their interactions using Hertzian contact, traction, and hydrodynamic/ elastohydrodynamic lubrication models. The vibration model can simulate bearings with distributed and localized geometrical imperfections on their cup raceways, cone raceways, and roller bodies. This paper focuses on the influence of localized cup raceway imperfections on bearing vibration. Three levels of localized defects were intentionally created on cup raceways and quantified using a surface profile gauge. The quantified defects on actual test bearings were used as inputs to the vibration model. The corresponding test bearings were evaluated with a high-precision bearing vibration test machine. Two different bearing designs were used in the study. The simulation and test data were analyzed and compared, and it was found that the simulation results agreed well with the test data.

Torque of Tapered Roller Bearings

1991 ◽  
Vol 113 (3) ◽  
pp. 590-597 ◽  
Author(s):  
R. S. Zhou ◽  
M. R. Hoeprich
Keyword(s):  
Film Thickness ◽  
Test Data ◽  
Roller Bearing ◽  
Elastohydrodynamic Lubrication ◽  
General Purpose ◽  
Operating Conditions ◽  
Composite Surface ◽  
Tapered Roller Bearing ◽  
Wide Range ◽  
Tapered Roller

An analytic tapered roller bearing torque model is presented along with laboratory test data. Initial results of this proposed model are favorable. An accurate general purpose torque prediction tool could be obtained by extending the concepts presented in conjunction with a more comprehensive analysis of actual bearing operating conditions. By using EHL (Elastohydrodynamic Lubrication) theory and micro-macro contact analysis, the bearing torque can be determined by predicting each torque component for each roller due to raceway rolling, raceway moments due to EHL pressure distribution, and frictional force of rib-roller end contact. The roughness effect of contact surfaces, effect of EHL film thickness parameter (the ratio of film thickness to composite surface roughness), and thermal EHL effects are also included. A bearing torque test rig, which can measure the torque of cup race, cone race, and rib separately, was built and used to provide test data. Good agreement between the experimentally measured bearing torques and the predictions of the new torque model has been obtained. This torque model will provide a greater fundamental understanding and is more versatile over a wide range of operating conditions.

scholarly journals Analysis of Stresses in a Tapered Roller Bearing Using Three-Dimensional Photoelasticity and Stereolithography

Materials ◽  
2019 ◽  
Vol 12 (20) ◽  
pp. 3427
Author(s):  
Filipe Gomes Vieira ◽  
Alexandre S. Scari ◽  
Pedro Américo Almeida Magalhães Júnior ◽  
Jordana S. R. Martins ◽  
Cristina Almeida Magalhães
Keyword(s):  
Rapid Prototyping ◽  
Data Storage ◽  
Roller Bearing ◽  
Three Dimensional ◽  
New Techniques ◽  
Tapered Roller Bearing ◽  
Photographic Images ◽  
Final Assembly ◽  
Tapered Roller ◽  
Digital Photoelasticity

Digital photoelasticity is an important segment of optical metrology for stress analysis by digital photographic images. Advances in digital image processing, data acquisition, standard recognition and data storage allow the utilization of computer-aided techniques in the automation and improvement of the digital photoelastic technique. The objective of this study is to develop new techniques using 3D rapid prototyping with transparent resins in digital photoelasticity. Some innovations are proposed (e.g., a tapered roller bearing built with 3D rapid prototyping with transparent resin and the final assembly with the specimens prototyped separately). A metrology study is carried out with the new techniques developed.

Evaluation of Tapered Roller Bearing Vibration Velocity as Data Series Using Grey System Theory

2012 ◽  
Vol 443-444 ◽  
pp. 97-104
Author(s):  
Xin Tao Xia ◽  
Wei Wei Man
Keyword(s):  
System Theory ◽  
Probability Distributions ◽  
Roller Bearing ◽  
Grey System Theory ◽  
Vibration Velocity ◽  
Data Series ◽  
Grey System ◽  
Tapered Roller Bearing ◽  
Tapered Roller ◽  
Bearing Vibration

With the help of the grey system theory and without any prior information on probability distributions and trends, this paper focus on modeling for the tapered roller bearing vibration velocity as a data series. And the experimental investigation shows that the estimated residual is very small and can satisfy the engineering requirement, laying the foundation for controlling over the vibration of tapered roller bearings in the manufacturing process.

Surface Crack Initiation Under Contact Fatigue: Experimental Observation and Contact Analysis

1993 ◽  
Vol 115 (4) ◽  
pp. 658-665 ◽  
Author(s):  
W. Cheng ◽  
H. S. Cheng ◽  
L. M. Keer ◽  
X. Ai
Keyword(s):  
Crack Initiation ◽  
Plastic Zone ◽  
Stress Analysis ◽  
Surface Crack ◽  
Contact Fatigue ◽  
Surface Profile ◽  
Elastohydrodynamic Lubrication ◽  
Contact Analysis ◽  
Hertzian Contact ◽  
Surface Crack Initiation

An experimental study of surface crack initiation was performed by means of a transverse furrow manufactured by the electric discharge machining (EDM) method. Since there is no built-up edge and plastic zone associated with an EDM furrow, the associated stress analysis is relatively simple and provides a reliable means of comparison with experiment. The test results showed that the crack initiation life was not sensitive to the size of the furrow. This phenomenon was explained by means of a micro-elastohydrodynamic lubrication (MEHL) analysis. The calculated results indicated that the pressure peak, Pmax, near the furrow was not sensitive to the depth and width of the furrow, and Pmax could be estimated from the Hertzian contact pressure P0. The more heavily loaded tests showed a newly deformed plastic zone (bump) near the furrow. Two methods were used for the contact simulation. The elastic-plastic contact analysis was selected for the case when a bump was present; otherwise, the MEHL analysis was used. The stress analysis illustrates that the value and the location of the maximum Mises stress was influenced by the friction coefficient and the geometry of the deformed surface profile.

Dynamic simulation for a tapered roller bearing considering a localized surface fault on the rib of the inner race

2017 ◽  
Vol 231 (4) ◽  
pp. 670-683 ◽  
Author(s):  
Jing Liu ◽  
Yimin Shao ◽  
Xiaomeng Qin
Keyword(s):  
Dynamic Simulation ◽  
Roller Bearing ◽  
Simulation Method ◽  
Vibration Characteristics ◽  
Hertzian Contact ◽  
Tapered Roller Bearing ◽  
Bearing Condition Monitoring ◽  
Tapered Roller ◽  
Inner Race ◽  
Bearing System

Vibration characteristics of a tapered roller bearing system will be significantly affected by a localized surface fault in the rib of the inner race. The operating condition for the tapered roller bearing system is always monitored to prevent serious failures from happening based on changes in the vibration characteristics. However, most of the previous works are focused on dynamic simulations for a localized surface fault in the race surface. A new dynamic simulation method for a tapered roller bearing with a localized surface fault on the rib of the inner race is proposed. The non-Hertzian contact of taper roller to races and rib is considered. The time-varying deflection excitation caused by the fault is formulated in the proposed method, as well as both the axial and radial contact deformation between the races and rollers. Effects of the axial load, radial load, and fault sizes on the vibration characteristics for the tapered roller bearing are analyzed. An experimental investigation is also developed to validate the proposed method. The results show that the proposed dynamic simulation method can formulate the vibration characteristics for the tapered roller bearing caused by the localized surface fault on the rib of the inner race, which may give some guidance for the tapered roller bearing condition monitoring and fault diagnosis, especially for the incipient localized surface fault.

Dynamic Analysis of Cage Behavior in a Tapered Roller Bearing

2005 ◽  
Author(s):  
Tomoya Sakaguchi ◽  
Kazuyoshi Harada
Keyword(s):  
Dynamic Analysis ◽  
Dynamic Simulation ◽  
Roller Bearing ◽  
Three Dimensional ◽  
Simulation Tool ◽  
Analysis Software ◽  
Traction Forces ◽  
Tapered Roller Bearing ◽  
Tapered Roller ◽  
Tapered Roller Bearings

We have developed a three-dimensional dynamic simulation tool for tapered roller bearings using commercially available analysis software, ADAMS (MSC. Software). Cage motion in six degrees was analyzed with the simulation tool and was measured by experiments. The results showed the validity of the simulation tool. Regarding the cage behavior, as the traction forces between rollers and races grew, the amplitude of the cage whirl motion increased up to the radial guide clearance between the roller and its cage pocket.

Elastohydrodynamic Lubrication of Roller Bearings

1970 ◽  
Vol 92 (2) ◽  
pp. 281-288 ◽  
Author(s):  
J. C. Skurka
Keyword(s):  
Surface Finish ◽  
Roller Bearing ◽  
Elastohydrodynamic Lubrication ◽  
Rolling Contact ◽  
Bearing Life ◽  
Endurance Tests ◽  
Tapered Roller ◽  
Cylindrical Roller Bearing ◽  
Cylindrical Roller ◽  
Lubricant Viscosity

Roller bearing endurance tests have been run on groups of bearings with L10 and L50 lives established by Weibull analysis. Bearing roller path surface finish, shaft speed, lubricant viscosity and lubricant temperature were varied. Relevant tapered roller and cylindrical roller bearing life data was selected from prior tests for comparison. Weibull plots show the effect of the variables on life and a graph comparing the ratio of L10 test life to the calculated life and the ratio of elastohydrodynamic lubricant film thickness to composite rolling contact surface finish is given. An empirical equation to predict the effect of varying lubricant and surface finish conditions on fatigue life is given.

Dynamic Analysis of Cage Behavior in a Tapered Roller Bearing

2006 ◽  
Vol 128 (3) ◽  
pp. 604-611 ◽  
Author(s):  
Tomoya Sakaguchi ◽  
Kazuyoshi Harada
Keyword(s):  
Axial Load ◽  
Degrees Of Freedom ◽  
Simulation Analysis ◽  
Roller Bearing ◽  
Three Dimensional ◽  
Radial Clearance ◽  
Tapered Roller Bearing ◽  
Six Degrees Of Freedom ◽  
Tapered Roller ◽  
Shape Simplification

A three-dimensional dynamic simulation analysis of a tapered roller bearing was performed using commercially available software. Without cage pocket shape simplification, the dynamic motion of the cage and rollers was calculated in six degrees of freedom. The motion of the cage and rollers was measured experimentally to verify the analysis. Under all axially loaded conditions, cage whirl was analytically predicted and experimentally confirmed. Whirl amplitude increased as the inner-ring rotational speed and axial-load magnitude increased. The maximum whirl amplitude reached the radial clearance between a roller and its pocket. Under combined load conditions, the cage also whirled. However, the whirl amplitude was smaller than only under axial load. Load distribution due to the addition of radial load to axial load equalized roller distribution. Equally distributed rollers limited the cage’s movable distance to circumferential clearance between a roller and its pocket.

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