Figure 10 - available via license: Creative Commons Attribution 4.0 International
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(a) Surface pitting diagram; (b) enlarged view of pitting pit; (c) composition analysis of oil sludge in pitting pit.
Source publication
This study aimed to explore the wear characteristics and evolution mechanisms of large-scale wind power gears under the impact load of particles of the three-body abrasive Al2O3 (0.2 mg/mL) from four aspects: oil analysis, vibration analysis, amount of gear wear, and tooth-surface-wear profile analysis. A magnetic powder brake was used to simulate...
Citations
... As a consequence the wear of the gears results in decreasing the overall reliability of the drive system and increasing the maintenance costs [1]. To overcome the deterioration of drive systems' reliability, research has been carried out on the development of mechanical gear designs that are optimized in terms of reliability and fault tolerance [6,7]. On the other hand, to mitigate problems related to wear and the high development costs of mechanical gears, magnetic gears have become a point of interest for many researchers [8,9]. ...
The aim of this study was to carry out the investigation and analysis of two-stage magnetic precession gear dynamics and the determination of the resonance frequencies, which can be a cause of the powertrain system failures. Graphical interpretation of the two-stage precession gear is presented, and two equations of the dynamics of the movable elements of the presented gearbox were determined. On the basis of these equations, the stiffness coefficients and resonance frequencies of the presented gearbox were mathematically derived. The next step was to develop a numerical model of the magnetic precession gear dynamics in the environment of MATLAB Simulink. The elaborated model allowed us to analyze the influence of varying the input speed and the load torque on the operation of the magnetic precession gear. The performed analyses of the dynamics of the magnetic precession gear showed the occurrence of a resonance phenomenon under the influence of load torque ripples with a frequency close to the natural frequency of the studied system.
