DIAGNOSIS OF THE ELECTRIC DRIVE OF THE DISCHARGE ROLLER CONVEYOR OF A WIDE-STRIP HOT MILL
DOI:
https://doi.org/10.14529/power220109Keywords:
electric drive of the rollers of the diverting roller table, broadband hot rolling mill, faults of the electric drive, diagnostic signs, diagnostic systemAbstract
Abstract. The purpose of the study is to develop an automated system for technical diagnostics of the state and
regulation of the electric drive of the rollers of the collector roller table at a wide hot rolling mill based on change in
the load currents of the rollers electric motors. The system allows the quality of finished rolled products and the productivity of the mill to be enhanced due to the timely detection of faulty equipment and its rapid replacement based on
the results of diagnostics. The following methods of diagnostics of the electric drive of the diverting roller table and its
possible malfunctions which can negatively affect the quality of the finished rolled products were analyzed: experimental identification of the relation of the forms of change in the load currents of the electric motors of the rollers with specific types of malfunctions; determination of diagnostic signs of malfunctions in the values of change in the load currents of the electric motors of the rollers; creation of a mathematical model for calculating the forces of strip transportation; development of methods and algorithms for technical diagnostics of the electric drive of the collector roller table
based on characteristics of change in the load currents of the electric motors of the rollers; development of a generalized
algorithm for the operation of the automated technical diagnostics system; experimental evaluation of the effectiveness
of the proposed methods and algorithms for diagnostics on the operating mill. Analytical methods of solving algebraic
and differential equations and systems were used in the study. As a result of the research, the technical effectiveness of
the methods and algorithms developed to diagnose the eccentricity of the roller barrel of the diverting roller table, malfunctioning of the brush-collector device of the roller electric motor, the destruction of the couplings in the roller electric drive line, malfunctioning of the bearing units in the roller electric drive line or the roller sides, the correct alignment of the roller relative to the technological plane of the diverting roller was experimentally confirmed. The diagnostic methods and algorithms developed can be used to create diagnostic systems for electric drives of diverting roller
table at operating mills during their reconstruction, as well as at newly built mills. The system thus developed was
installed at the industrial plant's 2000 hot rolling mill.
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