Application of a Rolling Bearing Life Model with Surface and Subsurface Survival to Hybrid Bearings in High-Load and High-Speed Applications

A previously published rolling bearing life model that separates the surface and subsurface survival is briefly summarised. The model is applied to the case of hybrid bearings and discussed with regard to a selected set of application examples. Ball hybrid bearings under equal load condition show 12% higher Hertzian stress than all-steel bearings. However, field applications, typically under light load, poor lubrication and contamination, show that hybrid bearings have longer fatigue life than all-steel bearings. Traditional all-steel life models fail to predict this type of behaviour. In this paper, it is shown that hybrid bearing unique fatigue performance can be described using the idea of separation of surface and subsurface survival. The model applies the classical rolling contact fatigue in the subsurface region of the rolling contact while a newly developed tribologically dependent surface degradation models is used for the ceramic-steel raceway interface. It is found that the particular fatigue resistance of the ceramic-steel interface of the hybrid bearing raceway can, in most cases, compensate for the additional stress present in the subsurface region of the contact.

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Efficiency of application of the phase-chronometric method and neurodiagnostics for monitoring the degradation of rolling bearings during operation

Izmeritel`naya Tekhnika ◽

10.32446/0368-1025it.2020-7-43-50 ◽

2020 ◽

pp. 43-50

Author(s):

A.S. Komshin ◽

K.G. Potapov ◽

V.I. Pronyakin ◽

A.B. Syritskii

Keyword(s):

Life Cycle ◽

Wavelet Analysis ◽

Metrological Support ◽

Rolling Bearing ◽

Technical Condition ◽

Measurement Information ◽

Rolling Bearings ◽

Vibration Diagnostics ◽

Bearing Life ◽

Alternative Approach

The paper presents an alternative approach to metrological support and assessment of the technical condition of rolling bearings in operation. The analysis of existing approaches, including methods of vibration diagnostics, envelope analysis, wavelet analysis, etc. Considers the possibility of applying a phase-chronometric method for support on the basis of neurodiagnostics bearing life cycle on the basis of the unified format of measurement information. The possibility of diagnosing a rolling bearing when analyzing measurement information from the shaft and separator was evaluated.

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CYCLOPS BHT

Alloy Digest ◽

10.31399/asm.ad.sa0173 ◽

1965 ◽

Vol 14 (2) ◽

Keyword(s):

Fracture Toughness ◽

Corrosion Resistance ◽

Elevated Temperature ◽

High Speed ◽

High Speed Steel ◽

High Strength ◽

Heat Treating ◽

High Load ◽

Structural Components ◽

Temperature Performance

Abstract Cyclops BHT is a low-alloy martensitic high-speed steel of the molybdenum type recommended for high strength, high load structural components designed for elevated temperature service. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: SA-173. Producer or source: Cyclops Corporation.

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VASCO M-50

Alloy Digest ◽

10.31399/asm.ad.ts0278 ◽

1974 ◽

Vol 23 (11) ◽

Keyword(s):

Elevated Temperature ◽

Physical Properties ◽

Surface Treatment ◽

High Speed ◽

High Speed Steel ◽

High Strength ◽

Heat Treating ◽

High Load ◽

Aisi 52100 ◽

Aisi 52100 Steel

Abstract VASCO M-50 is a hardenable (martensitic), low-alloy high-speed steel developed primarily for high-strength, high-load components (such as bearings and gears) designed for elevated-temperature service. It may be used at temperatures up to 600 F; this is in contrast to AISI 52100 steel which may be used up to only 350 F. This datasheet provides information on composition, physical properties, hardness, and elasticity. It also includes information on forming, heat treating, machining, joining, and surface treatment. Filing Code: TS-278. Producer or source: Teledyne Vasco.

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The Effect of the EHD Pressure Spike on Rolling Bearing Fatigue

Journal of Tribology ◽

10.1115/1.3261468 ◽

1987 ◽

Vol 109 (3) ◽

pp. 444-450 ◽

Cited By ~ 20

Author(s):

L. Houpert ◽

E. Ioannides ◽

J. C. Kuypers ◽

J. Tripp

Keyword(s):

Pressure Distribution ◽

High Stress ◽

Surface Damage ◽

Rolling Bearing ◽

Shear Stresses ◽

Stress Concentrations ◽

Surface Layers ◽

Rolling Bearings ◽

Life Model ◽

Pressure Spike

A recently proposed fatigue life model for rolling bearings has been applied to the study of lifetime reduction under conditions conducive to microspalling. The presence of a spike in the EHD pressure distribution produces large shear stresses localized very close to the surface which may account for early failure. This paper describes a parametric study of the effect of such spikes. Accurate stress fields in the volume are calculated for simulated pressure spikes of different height, width and position relative to a Hertzian pressure distribution, as well as for different lubricant traction coefficients and film thicknesses. Despite the high stress concentrations in the surface layers, reductions in life predicted by the model are modest. Typically, the pressure spike may halve the life, with the implication that subsurface fatigue still dominates. In corroboration of this prediction, preliminary experimental work designed to reproduce microspalling conditions shows that microindents due to overrolling particles are a much more common form of surface damage than microspalling.

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A high-speed and long-life triboelectric sensor with charge supplement for monitoring the speed and skidding of rolling bearing

Nano Energy ◽

10.1016/j.nanoen.2021.106747 ◽

2021 ◽

pp. 106747

Author(s):

Zhijie Xie ◽

Yu Wang ◽

Rensuan Wu ◽

Jihui Yin ◽

Di Yu ◽

...

Keyword(s):

High Speed ◽

Rolling Bearing ◽

Long Life

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Estimation of rolling bearing life with damage curve approach

Polish Maritime Research ◽

10.2478/v10012-011-0019-6 ◽

2011 ◽

Vol 18 (3) ◽

pp. 66-70 ◽

Cited By ~ 1

Author(s):

H. Mehdigholi ◽

H. Rafsanjani ◽

Behzad Mehdi

Keyword(s):

Natural Frequency ◽

Damage Mechanics ◽

Calculated Data ◽

Life Time ◽

Rolling Bearing ◽

Vibratory System ◽

Outer Race ◽

Bearing Life ◽

Proposed Model ◽

Acceleration Amplitude

Estimation of rolling bearing life with damage curve approach The ability to determine the bearing life time is one of the main purposes in maintenance of rotating machineries. Because of reliability, cost and productivity, the bearing life time prognostic is important. In this paper, a stiffness-based prognostic model for bearing systems is discussed. According to presumed model of bearing and fundamental of damage mechanics, damage curve approach is used to relate stiffness of vibratory system and bearing running life. Furthermore, using the relation between acceleration amplitude at natural frequency and stiffness, final relation between acceleration amplitude at natural frequency and running life time according to damage curve approach can be established and the final running time is predicted. Experiments have been performed on self alignment bearing under failures on inner race and outer race to calibrate and to validate the proposed model. The comparison between model-calculated data and experimental results indicates that this model can be used effectively to predict the failure lifetime and the remaining life of a bearing system.

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