One of the most important assemblies of electric rolling stock is a wheel-motor unit. Its faultless operation determines abilities of transport to fulfill their main functions.
One of the main requirements to the wheel-motor units is a set operational resource. Operation of rolling and sliding friction systems, such as ball- and roller-bearing assemblies, traction gears, commutator-and-brush device and other devices, which are the elements limiting the train resource in general, and depend on the vibration condition, quality of manufacture, repair and assembly.
It is reasonable to carry out the diagnostics of these facilities both during operation and maintenance with the required diagnostic depth.
Typical for these malfunctions is high level of noise, vibration, impact sound. By the deviations and higher levels of these parameters with the help of vibration analysis means it is possible to trace the defect development up to the moment when the usage of defected element is inexpedient or impossible in terms of operation.
Vibration analysis is based on the analysis of vibration process features changes, presupposing that the vibration signal of the operation unit contains all the information on the interactions of its details.
Basakin V.V. Analysis of malfunctions of wheel-motor units of motor-driven rolling stock for the purpose of their diagnostics // Nauka, obrazovanie, biznes (Science, education, business). - 2012. - pp. 136-140
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