... with energy-dispersive X-ray spectroscopy (EDX). The results of the 3D-optical profilometer provided detailed information on surface profiles and roughness created on bearing surfaces under machine operating conditions. FFT-bearing vibration results were correlated with the surface degradation study of SEM...

... tribological test (ASTM D2266) and simultaneously in a rolling bearing at various speeds and loads against two commercial greases as the benchmark. The vibrations and shock pulse measurements are recorded to assess the bearing performance. The tribo-dynamic investigation suggests that the eco-friendly nano...

...Gregory Roytman; Jocelyn Faydenko; Matthew Budavich; Judith D. Pocius; Gregory Cramer Crepitus vibrational and acoustic signal analysis of the human facet joints of the lumbar spine has historically been a difficult problem due to the inhomogeneous and varied signal characteristics. Although...

...Thi-Na Ta; Jeng-Haur Horng; Yunn-Lin Hwang The tribological and vibration behaviors of a lubricated system are often studied separately. However, in recent years, the combination of tribology and mechanical vibration significantly contributes in analyzing and solving many practical problems...

... the power of the finite element analysis (FEA) model and dimension analysis technique (DAT) to analyze the effect of the depth and slope angle of surface faults on the bearing contact characteristic. Experimentation is performed to investigate the vibration characteristics of ball bearings. The FEA, DAT...

...Surojit Poddar; N. Tandon This present article evaluates the state of starvation in a journal bearing using acoustic emission (AE) and vibration measurement techniques. A journal bearing requires a constant supply of oil in an adequate amount to develop a hydrodynamic film, thick enough to separate...

...Jayant Singh; Deepak Kumar; Naresh Tandon Friction is usually induced when the contacts are in relative motion, leading to mechanical vibration and consequently heat generation. The reduction of these undesirable parameters is possible by the application of greases, which intends to increase...

.... 14 07 2012 21 06 2013 This paper deals with vibration and acoustic emission (AE) measurements evaluating the separation of the balls and raceways with lubricating film in a linear-guideway–type recirculating ball bearing (linear bearing) under grease lubrication. In the experiments...

...Hiroyuki Ohta; Shinya Hayashi; Soichiro Kato; Yutaka Igarashi This paper deals with effects of grease types on vibrations and acoustic emissions (AEs) of linear-guideway type recirculating ball bearings with a millimeter-sized artificial defect in the carriage. First, the vibration and AE of one...

...V. N. Patel; N. Tandon; R. K. Pandey A dynamic model is reported herein for the study of vibrations of deep groove ball bearings having single and multiple defects on surfaces of inner and outer races. Masses of shaft, housing, races, and balls are considered in the modeling. The coupled solution...

... 03 2010 differential equations elasticity elastodynamics finite element analysis friction hydrodynamics liquid films machine bearings oils rotors valves tilting-pad journal bearings control elastohydrodynamics vibration Curves of static oil film thickness...

...Hiroyuki Ohta; Kazuya Matsuura; Soichiro Kato; Yutaka Igarashi This paper deals with vibrations and acoustic emissions (AEs) of linear-guideway type recirculating ball bearings with a millimeter-sized artificial defect in the carriage. The vibration and AE of one normal bearing without a defect...

... squeeze film damper model is developed, and the results are compared with those obtained using a linear approach. The effect of unbalance eccentricity on the vibration response and the transmitted force of the HSFD are investigated using the linear and nonlinear models. The results show good agreement...

...Hiroyuki Ohta, Associate Professor,; Soichiro Kato, Manager,; Jun Matsumoto, Engineer,; Kenta Nakano, Engineer, This paper deals with a design of crowning to reduce the ball passage vibrations of a linear guideway type recirculating linear ball bearing (linear bearing) with the crowning length L C...