DETERMINING THE RESOURCE OF THE OUTER RING OF A ROLLING BEARING BASED ON SIGNAL REGISTRATION AND SIMULATION OF THE TIME DEPENDENCE OF ACOUSTIC EMISSION PARAMETERS

2020 ◽  
pp. 26-34
Author(s):  
V. V. Nosov ◽  
I. A. Pavlenko ◽  
A. P. Artyushchenko ◽  
E. V. Grigoriev
Keyword(s):  
Acoustic Emission ◽  
Time Dependence ◽  
Experimental Studies ◽  
Surface Damage ◽  
Rolling Bearing ◽  
Diagnostic Value ◽  
Outer Ring ◽  
Rolling Bearings ◽  
Useful Signal ◽  
Informative Signals

Traditionally, the problem of monitoring the condition of rolling bearings can be solved based on registration of control signals that occur when the bearing performs a kinematic function due to contact of surface damage which is accumulated and caused by the processes of friction, impact, heat generation, contact electrical interaction, generation of elastic vibrations from them, etc. Relative to the bearing function of bearings, the diagnostic value of such signals is quite low, since they depend on many factors that are not related to resource-determining processes and play a destabilizing role in establishing the connection between control parameters and condition. The solution of the problem must be carried out based on a systematic approach linking the control of the object with the main criterion of its performance. Since the cause of bearing failures is fatigue processes occurring in the material of their elements, the most promising methods are those based on the registration of signals associated with the restructuring of the structure and the accumulation of damage of the material, and in particular, the method of acoustic emission (AE) based on recording the phenomenon of waves of elastic radiation at loading. The development of the acoustic emission method for monitoring the state of rolling bearings is based on a multi-level model of the time dependence of AE parameters, and the control is based on the assessment of the intensity parameters of the resource-determining stage of uniform elastic fracture of representative structural elements of the material of the test object. AE informative signals are selected, and diagnostic parameters are determined at the interlevel transition from macro- to micro- and nano-level. The idea of the transitions is to select representative informative parameters and to trace the connection between them through AE strength indicators that can highlight a useful signal in conditions of high instability and heterogeneity of the accompanying processes. The experimental stup and the results of experimental studies of AE of rolling bearings with an artificially created defect on the surface of the outer ring are described, the results of control are compared with the results of the analysis of the stress-strain state around the created defect, the informative value of the concentration and kinetic index and the possibility of evaluating the resource based on it are shown.

The Effect of the EHD Pressure Spike on Rolling Bearing Fatigue

1987 ◽  
Vol 109 (3) ◽  
pp. 444-450 ◽  
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.

scholarly journals Quality control of adjustment of clearances of ball bearing supports, dynamic devices rotor-type, according to parameters of acoustic emission signals

2021 ◽  
Vol 2131 (4) ◽  
pp. 042099
Author(s):  
Ye Lebedev ◽  
I Golikov ◽  
A Repin ◽  
L Bogatov
Keyword(s):  
Acoustic Emission ◽  
Axial Load ◽  
Rotation Axis ◽  
Experimental Studies ◽  
Bolted Joints ◽  
Rolling Bearings ◽  
Bearing Life ◽  
Ae Signals ◽  
Rotor Type ◽  
Rotary Type

Abstract The article is devoted to increasing the bearing life of dynamic rotary-type machines by controlling the uniformity of the distribution of the value of the preliminary axial load acting on the rolling bearings of the rotation axis of the power unit. The possibility of monitoring the axial load using acoustic emission (AE) signals is considered. The results of experimental studies of the kinematics of the ball movement relative to other bearing parts, depending on the tightening torque of bolted joints, estimated by the parameters of AE signals, are presented.

The Stress Analysis about Rolling-Sliding Blend Bearing under Heavy Load

2011 ◽  
Vol 308-310 ◽  
pp. 1792-1795
Author(s):  
Li Ming Lu
Keyword(s):  
Finite Element ◽  
Service Life ◽  
Carrying Capacity ◽  
Element Model ◽  
Rolling Bearing ◽  
Outer Ring ◽  
Rolling Bearings ◽  
Element Analysis ◽  
Heavy Load ◽  
The Finite Element Model

In the paper a new kind of rolling-sliding blend bearing has been studied. In order to comparing the new bearings and rolling bearings in the carrying capacity and service life, the stresses on the inner ring, the outer ring and the roller of rolling bearing and rolling-sliding blend bearing are analyzed by establishing the finite element model and solving it with finite element analysis software. The results show that the width of the stress concentration area on the outer ring and the roller and the inner ring of rolling-sliding blend bearing is 25 per cent narrower than that of rolling bearing and the depth of the largest stress on the outer ring and the roller and the inner ring of rolling-sliding blend bearing is 25 per cent shallower than that of rolling bearing and the largest stress on the middle and the end of the outer ring and the roller and the inner ring of rolling-sliding blend bearing is much smaller than that of rolling bearing. In the same case rolling-sliding blend bearings have greater carrying capacity and longer service life than rolling bearings.

Fault Diagnosis System of Rolling Bearing Based on Wavelet Analysis

2012 ◽  
Vol 166-169 ◽  
pp. 951-955 ◽  
Author(s):  
Li Na Wang ◽  
Hong Bo Wang ◽  
Yong Hui Cai ◽  
Shi Long Wang
Keyword(s):  
Fault Diagnosis ◽  
Wavelet Analysis ◽  
Friction Pair ◽  
Surface Damage ◽  
Rolling Bearing ◽  
Rolling Bearings ◽  
Diagnosis System ◽  
Stationary Signals ◽  
Diagnosis Method ◽  
Fault Diagnosis System

According to the characteristics of fault vibration of rolling bearing (non-stationary signals), a method of fault diagnosis based on wavelet analysis is put forward. In the method, the signals included faulty information of rolling bearing are decomposed and reconstructed by Matlab software, and by zoom frequency spectrum analysis, the fault information composition of the rolling bearings can be extracted effectively to determine the faulty type of the rolling bearings. Based on the above, an applicable fault diagnosis system for rolling bearing with surface damage in friction pair was developed. It has been proven by practice that the diagnosis method of system is surefire and its results are stable and reliable. Through being improved and expanded，the system can be applied to collect and analyze other vibration signals.

scholarly journals EXPERIMENTAL APPLICATIONS ON THE INFLUENCE OF INTERNAL OPERATION CLEARANCE OF THE FAULTY ROLLING BEARINGS UPON THEIR REMAINING LIFETIME

2017 ◽  
Vol 20 (1) ◽  
Author(s):  
DUMITRU-CRISTINEL NADABAICA ◽  
VALENTIN NEDEFF ◽  
LUMINITA BIBIRE ◽  
NARCIS BÂRSAN
Keyword(s):  
Experimental Study ◽  
Temperature Difference ◽  
Work Load ◽  
Rolling Bearing ◽  
Operating Conditions ◽  
Outer Ring ◽  
Rolling Bearings ◽  
Rolling Elements ◽  
Bearing Rings

<p>In the calculation of the rolling bearings lifetime are taking in to consideration the distribution of the work load on each rolling elements, obliquity, internal operation clearance and pre-stressing. In the case of a rolling bearing with a defect, the internal operation clearance have an influence upon the evolution of its deterioration and remaining lifetime by: internal manufacturing clearance; the expansion of the inner ring when the rolling bearing is mounted on a adapter sleeve; the contraction of the outer ring when the rolling bearing is mounted in the housing; and the temperature difference between rolling bearing rings during operation. This paper presents an experimental study regarding to the influence of the internal operation clearance of the ZKL 1205K rolling bearing upon the remaining lifetime in same operating conditions. </p>

scholarly journals A novel method for diagnosing rolling bearing surface damage by electric impedance analysis

2022 ◽  
Author(s):  
Georg Martin ◽  
Florian Michael Becker ◽  
Eckhard Kirchner
Keyword(s):  
Impedance Analysis ◽  
Surface Damage ◽  
Time Domain Analysis ◽  
Rolling Bearing ◽  
Domain Analysis ◽  
Frequency Domain Analysis ◽  
Rolling Bearings ◽  
Monitoring Method ◽  
Novel Method ◽  
Bearing Damage

This paper presents a novel condition monitoring method for rolling bearings, based on measuring the electric bearing impedance. The method can diagnose the presence of damage by frequency-domain analysis, and its extension along the raceway by time-domain analysis. The latter enables the assessment of the severity and the progression of bearing damage. A fatigue test shows that the occurrence of pittings in the bearing raceways causes characteristic peaks in the impedance signal, and that the duration of the peaks increases during damage progression. A second test series with artificial damage shows that the duration of the peaks depends on the bearing load and the length of the damage along the raceway and confirms the explanation hypothesis.

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

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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