Lubrication Review: Developments in Bearings and Lubricants—a Digest of the Literature From 1962–1963

1964 ◽  
Vol 86 (4) ◽  
pp. 883-906
Author(s):  
D. F. Hays ◽  
J. D. McHugh ◽  
E. E. Klaus ◽  
W. J. Wojtowicz ◽  
H. A. Hartung ◽  
...  
Keyword(s):  
Boundary Lubrication ◽  
Friction And Wear ◽  
Essential Elements ◽  
Theory And Practice ◽  
Experimental Investigations ◽  
Rolling Element Bearings ◽  
Rolling Element ◽  
Recent Developments ◽  
Film Lubrication ◽  
Fluid Film Lubrication

The 1962–1963 Lubrication Review brings together information on publications relating to several aspects of the broad field of lubrication. Although it does not cover all of the significant domestic and foreign publications in this field, it does summarize many of the results of current theoretical and experimental investigations. It also indicates themes or patterns of current programs relating to lubrication. The review is more than a list of references since each reviewer has commented on the essential elements or results reported by the investigators. The areas reviewed include fluid-film lubrication, developments in lubricants, metalworking lubricants, automotive lubricants, gear lubrication, boundary lubrication, rolling element bearings, and friction and wear. It is hoped that those who are currently involved in these specific areas will find the review helpful in summarizing recent developments in these areas and that those who are interested in extending their knowledge of lubrication theory and practice might find the review to be a helpful guide.

Lubrication Review: Developments in Bearings and Lubricants—A Digest of the Literature From 1961–1962

1964 ◽  
Vol 86 (2) ◽  
pp. 367-386
Author(s):  
R. P. Shevchenko ◽  
G. S. Reichenbach ◽  
M. Roberts ◽  
E. Kingsbury ◽  
Dimiter Ramadanoff ◽  
...  
Keyword(s):  
Friction And Wear ◽  
Theoretical Work ◽  
Corrective Action ◽  
Fluid Film ◽  
Rolling Element Bearings ◽  
Basic Work ◽  
Rolling Element ◽  
Work Done ◽  
Film Lubrication

This 1961–1962 lubrication digest reviews developments in fluid-film and rolling-element bearings, lubrication for bearings, gears, and automobiles; and covers basic work done in the general areas of friction and wear; elastohydrodynamic, boundary, and full film lubrication; and lubricant properties. The authors cover specific areas of lubrication literature and it is recommended that the reader, even the specialist, peruse related areas since the years of effort in this field have exposed more of the fundamentals; and the conclusious drawn, and the basic laws formulated in one area are important to all areas. It is wistfully hoped that the digest will disclose disproportionate effort because of funding and imbalance between empirical and theoretical work and spur corrective action.

Vibration Analysis Based Feature Extraction for Bearing Fault Detection

2012 ◽  
Vol 197 ◽  
pp. 124-128
Author(s):  
Jie Liu ◽  
Chun Sheng Yang ◽  
Qing Feng Lou
Keyword(s):  
Feature Extraction ◽  
Fault Detection ◽  
Rolling Element Bearings ◽  
Bearing Fault ◽  
Bearing Fault Detection ◽  
Rotary Machine ◽  
Catastrophic Failures ◽  
Rolling Element ◽  
Significant Research ◽  
Recent Developments

Rolling element bearings are widely used in various rotary machines. Most rotary machine failures are attributed to unexpected bearing faults. Accordingly, reliable bearing fault detection is critically needed in industries to prevent these machines’ performance degradation, malfunction, or even catastrophic failures. Feature extraction plays an important role in bearing fault detection and significant research efforts have thus far been devoted to this subject from both academia and industry. This paper intends to provide a brief review of the recent developments in feature extraction for bearing fault detection, and the focus will be placed on the advances in methods for dealing with the nonstationary characteristics of bearing fault signatures.

scholarly journals There’s the Rub

2009 ◽  
Vol 131 (01) ◽  
pp. 41-45
Author(s):  
James G. Skakoon
Keyword(s):  
High Performance ◽  
Friction And Wear ◽  
Mechanical Design ◽  
Rolling Element Bearings ◽  
Dynamic Coefficients ◽  
Design Engineers ◽  
Rolling Element ◽  
Practical Guidelines ◽  
System Properties ◽  
Induced Changes

This article reviews the mechanical design and a set of practical guidelines for design engineers. Engineers have plenty of technology for controlling friction and wear, including naturally lubricious materials, high-performance lubricants, and rolling element bearings. But where friction is concerned, good mechanical design starts with guidelines. Friction changes with time, reflecting sliding-induced changes to the interface. The traditional single static and single dynamic coefficients of friction are misleading because they do not reflect fluctuations and transitions in friction. The friction coefficient, static or dynamic, has no single, unique value for a given material pair, but rather is a characteristic of those materials when rubbed together under specific conditions. Friction and wear are not material properties; they are system properties. So many test protocols, such as thrust washer tests, will give one result, but actual systems will have different results.

Experimental investigation on time-domain features in the diagnosis of rolling element bearings by acoustic emission

2021 ◽  
pp. 107754632110161
Author(s):  
Aref Aasi ◽  
Ramtin Tabatabaei ◽  
Erfan Aasi ◽  
Seyed Mohammad Jafari
Keyword(s):  
Acoustic Emission ◽  
Condition Monitoring ◽  
Time Domain ◽  
Central Moment ◽  
Rolling Element Bearings ◽  
Test Rig ◽  
Acoustic Emission Sensor ◽  
Outer Race ◽  
Common Time ◽  
Rolling Element

Inspired by previous achievements, different time-domain features for diagnosis of rolling element bearings are investigated in this study. An experimental test rig is prepared for condition monitoring of angular contact bearing by using an acoustic emission sensor for this purpose. The acoustic emission signals are acquired from defective bearing, and the sensor takes signals from defects on the inner or outer race of the bearing. By studying the literature works, different domains of features are classified, and the most common time-domain features are selected for condition monitoring. The considered features are calculated for obtained signals with different loadings, speeds, and sizes of defects on the inner and outer race of the bearing. Our results indicate that the clearance, sixth central moment, impulse, kurtosis, and crest factors are appropriate features for diagnosis purposes. Moreover, our results show that the clearance factor for small defects and sixth central moment for large defects are promising for defect diagnosis on rolling element bearings.

scholarly journals Comparison Between the Action of Nano-Oxides and Conventional EP Additives in Boundary Lubrication

Lubricants ◽  
2020 ◽  
Vol 8 (5) ◽  
pp. 54
Author(s):  
Valdicleide Silva Mello ◽  
Marinalva Ferreira Trajano ◽  
Ana Emilia Diniz Silva Guedes ◽  
Salete Martins Alves
Keyword(s):  
Friction Coefficient ◽  
Boundary Lubrication ◽  
Friction And Wear ◽  
Film Formation ◽  
Environmental Issues ◽  
Protective Film ◽  
Extreme Pressure ◽  
Extreme Pressure Additives ◽  
Environmental Requirements ◽  
Lubrication Conditions

Additives are essential in lubricant development, improving their performance by the formation of a protective film, thus reducing friction and wear. Some such additives are extreme pressure additives. However, due to environmental issues, their use has been questioned because their composition includes sulfur, chlorine, and phosphorus. Nanoparticles have been demonstrated to be a suitable substitute for those additives. This paper aims to make a comparison of the tribological performance of conventional EP additives and oxides nanoparticles (copper and zinc) under boundary lubrication conditions. The additives (nanoparticles, ZDDP, and sulfur) were added to mineral and synthetic oils. The lubricant tribological properties were analyzed in the tribometer HFRR (high frequency reciprocating rig), and during the test, the friction coefficient and percentual of film formation were measured. The wear was analyzed by scanning electron microscopy. The results showed that the conventional EP additives have a good performance owing to their anti-wear and small friction coefficient in both lubricant bases. The oxides nanoparticles, when used as additives, can reduce the friction more effectively than conventional additives, and displayed similar behavior to the extreme pressure additives. Thus, the oxide nanoparticles are more environmentally suitable, and they can replace EP additives adapting the lubricant to current environmental requirements.

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