System Model of a Technical Level of Rolling Bearings
Sergiy Gutyrya
Odessa National Polytechnic University, Odessa, Ukraine
Victor Yaglinskiy *
Odessa National Polytechnic University, Odessa, Ukraine
Anatoly Gaydamaka
Kharkov National Technical Polytechnic University, Kharkov, Ukraine
*Author to whom correspondence should be addressed.
Abstract
Purpose: To develop system hierarchical model of a technical level of rolling bearings, to prove efficiency of the modernization of standard designs providing increase of operational characteristics of axle boxes of railway transport.
Methodology: The hierarchy of structure and functional links between rolling bearing elements as mechanical system is established; quality indicators are offered; dependences for calculation of elements of a matrix of quality for the standard and modernized design are offered; results of solutions of system model are presented in the form of "a quality web"; efficiency of the proposed constructive solutions is confirmed.
Results: The directions of modernization of a design of roller cylindrical bearings as a part of axle boxes of railway transport providing increase of their dynamic loading capacity at 10,5%, the power efficiency at 59%, a resource at 19%, decrease at 11% of level of internal dynamic loadings, nominal temperature condition of operation at speeds of train movement up to 300 km/h are proved. As a result the indicator of a technical level of the upgraded bearings is raised at 47%.
Conclusion: Further development was gained by a system method of estimation and management of a technical level of machine-building production at stages design and modernization.
Keywords: Roller cylindrical bearing, operational characteristics, settlement models, quality indicators