Noack G. Berechnung hydrodynamisch geschmierter Gleitlager dargestellt [ 19] VDI Richtlinie ; Düsseldorf –  Lang O R, Steinhilper W. Gleitlager. VDI-Z. () 14, p. Lang, O.R.: Moderne Berechnungsverfahren bei der Auslegung von Dieselmotoren. 69 Lang, O.R.; Steinhilper, W.: Gleitlager. O.R. Lang and W. Steinhilper. Gleitlager. Springer, A. Boyaci, H. Hetzler, W . Seemann, C. Proppe, and J. Wauer. Analytical bifurcation analysis of a rotor.
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Machine-specific data collection parameters and data management functions will need to be developed to enable integration of the right criteria, and identification of gleitlxger failure.
The test bench enables testing with half- and complete shells. The progress of the bearing damage can be clearly observed. Acoustic emission analysis also has an extra advantage with the AE-sensor. The test bench consists of a steel shaft supported by two bearings.
: W. Steinhilper: Books
Failure-free running machines demand efficient and reliable monitoring systems, which can report on the current condition of the bearing arrangement while in operation.
The characteristic curve falls llang a minimum value and then increases.
Munsterman, About the Author M. On the basis of these severities, this measurement procedure shows a large potential for a practical use in the early recognition of bearing failures. Shaft Rotational Speed, Loading Force: The loading force was increased to the point where asperity contacts began to occur.
Metall 31Nr. At the Institute of Product Development steinnhilper the University of Karlsruhe, the procedure of acoustic emission AE analysis to detect damage in sliding bearings is being examined. This corresponds with the abrupt increase of the torque signal. Sliding Bearing Test Bench The fleitlager bench enables testing with half- and complete shells.
Further investigations presented similar results although bearing shells with different diameters and materials were used. Further analysis is required to fully explain the extent to which each of the measured variables influence the acoustic signal.
The monitoring of the bearing back temperature, which is often used to supervise bearings, clearly reacted later than the AE signal.
This response is characteristic to all the tests conducted and was observed in the generation of bearing damage. Friction and wear increase quickly, leading finally to a failure of the bearing. Toggle navigation Toggle search. In addition, the slight increase of the amplitude between kHz and kHz is characteristic of the intact running bearings.
An increase of the amplitude in the range between approximately 80 glsitlager and kHz in the failure can be clearly recognized. Acoustic Emission Mean Amplitude vs.
The test bearing is located between both supporting bearings, which can be loaded using a hydraulic cylinder with a static loading force of up to 60 kN 13, pounds Figure 3.
The success of a continuous surveillance system will depend on its configuration relative to the specific mechanical interactions. Current Issue Archive Advertise. These studies demonstrated that acoustic emission analysis is an appropriate measurement procedure to detect incipient failures at sliding bearings gleeitlager the correlation between the emitted acoustic signal and the energy dissipated in the sliding metallic contacts.
It can be mounted far away from the metallic contacts and therefore outside of the housing. To the right of the mixed lubrication regime, the subsequent increasing of the Stribeck-curve is referred to as the elastohydrodynamic regime. Time Variation of the Frequency Spectra. This course corresponds with the progress of the Stribeck-curve which describes the correlation between sliding speed and friction coefficient in sliding contacts Figure 2.
The increase of the composite acoustic spectral emission precedes the increase observed in the torque and temperature curve. The Best Gets Better: For the tests, lead-copper-tin-bearings of the type Glyco 40 and bronze-bearings with a diameter of In Figure 6, the value of this integral is given next to the progress courses of load, torque and bearing back temperature.
This can be caused in boundary, mixed or elastohydrodynamic lubrication regimes as well as by the appearance and propagation of cracks, fracture processes, cavitations phenomena and phase changes, or through steonhilper deformations.
Monitoring Lubrication Regimes in Sliding Bearings
In this region, the two machine surfaces are separated by a lubricant film. Starting at the 16th test series, the amplitude in the range between 80 to kHz is steinhilpr pronounced, showing the beginning of metallic contact between shaft and shell, and eventually leading to a bearing failure.
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