Life Prediction for Linear Rolling Element Bearings: A New Approach to Reliable Life Assessment

2001 ◽  
Vol 124 (1) ◽  
pp. 121-128 ◽  
Author(s):  
Shigeo Shimizu ◽  
Chandra S. Sharma ◽  
Takeki Shirai
Keyword(s):  
Weibull Distribution ◽  
Dynamic Load ◽  
Life Prediction ◽  
Life Assessment ◽  
Rolling Element Bearings ◽  
Life Test ◽  
New Approach ◽  
Rolling Element ◽  
Load Ratings ◽  
Two Parameter

A new approach to the life assessment for linear bearings using three-parameter Weibull distribution is discussed and theoretical basic dynamic load ratings are calculated for linear motion ball guides (LMBG) and ball bushes. Life test experiments are also carried out for these two types of linear bearings with varying design features for each type. The concept of a minimum life prior to which there is no failure, is introduced in the analysis of the life test data. The effects of introducing ball cages in LMBGs and rounding of the edges in the case of ball bushes on their lives, basic dynamic load ratings, and the λbm factors are examined. It is observed that compared with a two-parameter Weibull distribution, an analysis based on a three-parameter Weibull distribution clearly reveals the differences in the lives of linear bearings for changes in their designs.

scholarly journals Chaotic prediction of vibration performance degradation trend of rolling element bearing based on Weibull distribution

2019 ◽  
Vol 103 (1) ◽  
pp. 003685041989219
Author(s):  
Li Cheng ◽  
Xintao Xia ◽  
Liang Ye
Keyword(s):  
Weibull Distribution ◽  
Relative Error ◽  
High Reliability ◽  
Prediction Method ◽  
Performance Degradation ◽  
Rolling Element Bearing ◽  
Maximum Relative Error ◽  
Rolling Element Bearings ◽  
Rolling Element ◽  
Vibration Performance

Rolling element bearings are used in all rotating machinery, and the degradation performance of rolling element bearings directly affects the performance of the machine. Therefore, high reliability prediction of the performance degradation trend of rolling element bearings has become an urgent research problem. However, the degradation characteristics of the rolling element bearings vibration time series are difficult to extract, and the mechanism of performance degradation is very complicated. The accurate physical model is difficult to establish. In view of the above reasons, based on the vibration performance data of rolling element bearings, a model of bearing performance degradation trend parameter based on wavelet denoising and Weibull distribution is established. Then, the phase space reconstruction of the series of bearing performance degradation trend parameter is carried out, and the prognosis is obtained by the improved adding weighted first-order local prediction method. The experimental results show that the bearing vibration performance degradation parameter can accurately depict the degradation trend of the bearing, and the reliability level is 91.55%; and the prediction of bearing performance degradation trend parameter is satisfactory: the mean relative error is only 0.0053% and the maximum relative error is less than 0.03%.

A SVR-Based Remaining Life Prediction for Rolling Element Bearings

2015 ◽  
Vol 15 (4) ◽  
pp. 548-554 ◽  
Author(s):  
Xiao-lin Wang ◽  
Han Gu ◽  
Li Xu ◽  
Cun Hu ◽  
Hui Guo
Keyword(s):  
Life Prediction ◽  
Rolling Element Bearings ◽  
Remaining Life ◽  
Rolling Element

Multiaxial Fatigue Failure Criterion Considering Formation and Growth of Small Cracks

2010 ◽  
Author(s):  
Yukio Takahashi
Keyword(s):  
Life Prediction ◽  
Fatigue Tests ◽  
Multiaxial Fatigue ◽  
Fatigue Life Prediction ◽  
New Approach ◽  
Small Cracks ◽  
Failure Life ◽  
Parameter Approach ◽  
Realistic Prediction ◽  
Two Parameter

Treatment of stress multiaxiality in fatigue assessment is practically important in many components subjected to cyclic loading during their operation. Based on the results of fatigue tests on hollow and solid bar specimens of SUS316NG and SGV410 under various combinations of axial and torsional stresses, accuracy of fatigue life prediction based on the conventional parameters as well as a two parameter approach newly proposed here was studied. The conventional parameters tended to provide conservative prediction of the failure life for shear-dominated cases especially for SUS316NG while the new approach was able to give more realistic prediction of failure lives.

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