Undestroying control and diagnostics of rolling bearings
Journal Title: Вісник Тернопільського національного технічного університету - Year 2015, Vol 77, Issue 1
Abstract
Rolling bearings are the most widespread and the most vulnerable element of any mechanism. They carry out the spatial fixing of the revolved details and are subject to main static and dynamic efforts arising in a mechanism. Therefore the technical condition of bearings is a major constituent determining the capacity of mechanism on the whole. To prolong the operating life and reliability of equipment, decrease of the expenses for maintenance and idle time, the system of the exact diagnosing of current technical condition of rolling bearings is needed. Because of that the methods of control and diagnostics, being based on measuring of parameters of vibration have become vary popular. It is caused by the fact, that vibration signals carry in themselves information about the state of mechanism, bearings in particular. A theory and practice of analysis of vibration signal is so well studied, that it is possible to obtain reliable information about current technical condition of not only a bearing, but its elements as well. The practical tasks of diagnostics of rolling bearings in the process of their operation deal, as a rule, with one of three basic methods. The algorithms of discovery the defects of temperature growth of the bearing unit are used in the first, in the second – appearance the products of wear in lubrication and in the third – the change of properties of vibration (noise). The most complete and detailed diagnostics of bearings with the discovery and identification of defects at the early stage of their development is executed on the signal of bearing vibration, mainly, high-frequency. Rolling bearing is the source of forces of two basic kinds – kinematics and forces of friction. Sometimes the third type of forces appears – shock type. The analysis of methods of undestroying control which provide efficient estimation of the technical condition of rolling bearings during their operation have been carried out in the article. The modern methods of ultrasonic estimation of the technical condition of rolling bearings are considered in details: Peak-factor, direct spectrum, spectrum of rounding and shock impulses.
Authors and Affiliations
Volodymyr Averyanov
Keywords
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