scholarly journals Tribological Aspects of Rolling Bearing Failures

10.5772/20790 ◽  
2011 ◽  
Author(s):  
Jurgen Gegner
Keyword(s):  
Rolling Bearing ◽  
Bearing Failures

Fault Diagnosis Methods of Rolling Bearing: A General Review

2011 ◽  
Vol 480-481 ◽  
pp. 986-992 ◽  
Author(s):  
Xiao Xuan Qi ◽  
Jian Wei Ji ◽  
Xiao Wei Han
Keyword(s):  
Fault Diagnosis ◽  
Rolling Bearing ◽  
Rotating Machinery ◽  
Rolling Bearings ◽  
Signal Process ◽  
Existing Problems ◽  
Bearing Failures ◽  
Non Stationary Signal ◽  
Fault Mechanism ◽  
Research Situation

Rolling bearing failures account for most of rotating machinery failures. Fault diagnosis of rolling bearings according to their running state is of great importance. In this paper current research situation and existing problems of fault diagnosis are summarized firstly. Then several different diagnosis approaches in terms of the measuring medium are reviewed. After analysis of fault mechanism, feature extraction based on non-stationary signal process is elaborated. Finally, the development tendencies are pointed out.

Early fault diagnostic system for rolling bearing faults in wind turbines

2021 ◽  
pp. 1-37
Author(s):  
Libowen Xu ◽  
Qing Wang ◽  
Ioannis Ivrissimtzis ◽  
Shisong Li
Keyword(s):  
Wind Turbines ◽  
Early Stage ◽  
Reference Signal ◽  
Diagnostic System ◽  
Rolling Bearing ◽  
Fault Classification ◽  
Support Vector ◽  
Intrinsic Mode Functions ◽  
Bearing Failures ◽  
Fault Diagnostic

Abstract The operation and maintenance costs of windfarms are always high due to high labour costs and the high replacement cost of parts. Thus, it is of great importance to have real-time monitoring and an early fault diagnostic system to prevent major events, reduce time-based maintenance and minimize the cost. In this paper, such a 2-step system for early-stage rolling bearing failures in off-shore wind turbines is introduced. Firstly, Empirical Mode Decomposition (EMD) is applied to minimize the effect of ambient noise. Next, correlation coefficients between a reference signal and test signals are obtained and incipient fault detection is achieved by comparing the results with a threshold value. Through further analysis of the envelope spectrum, Sample Entropy for selected Intrinsic Mode Functions is obtained, which is further used to train a Support Vector Machine classifier to achieve fault classification and degradation state recognition. The proposed diagnostic approach is verified by experimental tests, and an accuracy of 98% in identifying and classifying rolling bearing failures under various loading conditions is obtained.

Detrimental Effects of Debris Dents on Rolling Contact Fatigue

1999 ◽  
Vol 122 (1) ◽  
pp. 55-64 ◽  
Author(s):  
D. Ne´lias ◽  
F. Ville
Keyword(s):  
Numerical Simulations ◽  
Rolling Contact Fatigue ◽  
Contact Fatigue ◽  
Surface Damage ◽  
Rolling Bearing ◽  
Initiation Site ◽  
Solid Particles ◽  
Rolling Contact ◽  
Bearing Failures ◽  
Ehl Contact

Debris dents produced by solid particles in suspension in oil or grease when they travel through an EHL contact may be at the origin of rolling bearing failures. A summary of an experimental investigation carried out to identify (i) the particle entry ratio, (ii) the mechanisms of particle fragmentation or deformation, (iii) the resulting indentation features, and (iv) the initiation site of subsequent surface damage is presented first. Afterwards, numerical simulations of a dent moving through an EHL contact are performed. A critical slide-to-roll ratio is found. Results of our numerical simulations are analyzed and discussed in relation to the concept of infinite life for rolling bearing applications. [S0742-4787(00)00901-2]

scholarly journals Vibration Reduction System Using Magnetic Suspension Technology

2015 ◽  
Vol 27 (1) ◽  
pp. 31-42
Author(s):  
Jarosław Spychała ◽  
Mariusz Żokowski ◽  
Paweł Majewski
Keyword(s):  
Vibration Reduction ◽  
Roller Bearing ◽  
Rolling Bearing ◽  
Magnetic Bearing ◽  
Magnetic Suspension ◽  
Technical Object ◽  
Reduction System ◽  
Bearing Failures ◽  
Active Vibration ◽  
Positive Results

Abstract The article presents considerations concerning the construction of vibration reduction system using magnetic suspension technology. Presents the results of simulation, numerical and experimental the bearingless electric motor, for which successfully used this type of solution. Positive results of research and testing have become the basis for the development of the concept of building this type of active vibration reduction system , at the same time acting as a support for a technical object, which is a jet engine. Bearing failures are manifested by loss or distortion of their mass, which leads to a total destruction of the roller bearing, and thus reflected in the security. The article presents the concept of building active magnetic suspension to eliminate the bearing system of classical rolling bearing and replace it with magnetic bearing.

A Survey of Rolling-Bearing Failures

1969 ◽  
Vol 184 (6) ◽  
pp. 48-56 ◽  
Author(s):  
A. W. Morgan ◽  
D. Wyllie
Keyword(s):  
Corrosion Inhibitors ◽  
Rolling Bearing ◽  
Mineral Oil ◽  
Gelling Agent ◽  
Metallic Soap ◽  
High Failure Rate ◽  
Rolling Bearings ◽  
Electrical Machinery ◽  
Bearing Failures ◽  
Oxidation And Corrosion

The condition of approximately 600 suspect rolling bearings from electrical machinery was examined. This number did not represent a high failure rate in relation to the number in use at the time, but afforded a basis for the assessment of the frequency of the various types of failure. The grease in use was the R.N. multipurpose grease XG-274 which consists of mineral oil and a gelling agent (currently a metallic soap) and oxidation and corrosion inhibitors, but some bearings still contained earlier greases. The most frequent causes of failure were corrosion, various machine and fitting defects, and dirt. The defects detected are discussed.

scholarly journals The origins of white etching cracks and their significance to rolling bearing failures

2019 ◽  
Vol 120 ◽  
pp. 107-133 ◽  
Author(s):  
Francesco Manieri ◽  
Kenred Stadler ◽  
Guillermo E. Morales-Espejel ◽  
Amir Kadiric
Keyword(s):  
Rolling Bearing ◽  
White Etching Cracks ◽  
Bearing Failures

Discussion on “Rolling bearing applications” at the Manchester Section of the Institution

1948 ◽  
Vol 27 (8) ◽  
pp. 416
Author(s):  
Morton ◽  
Allan ◽  
Hayton ◽  
Gejji ◽  
Murphy ◽  
...  
Keyword(s):  
Rolling Bearing
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