Research of wear resistance of working surfaces of shredder rolls
2020
Pastukhov, A., Belgorod State Agricultural Univ. named after V. Gorin (Russian Federation) | Vodolazskaya, N., Belgorod State Agricultural Univ. named after V. Gorin (Russian Federation) | Minasyan, A., Belgorod State Agricultural Univ. named after V. Gorin (Russian Federation) | Kolesnikov, A., Belgorod State Agricultural Univ. named after V. Gorin (Russian Federation)
Operational research observations of roll shredders for agricultural processing materials of varying hardness show that failure of their functioning is mainly due to wear of working surfaces of rolls. The purpose of the work is to develop a method of calculating specific wear of working elements of roller shredders depending on physical and mechanical properties of the roller material, mill material and the structural and technological parameters of the unit. Research task of the wear test was to determine the integral wear characteristics depending on the combined effect of factors on the wear process. The method of the research includes study of particle kinematics of mill material in the gap between rolls of shredder, estimation of linear wear on working surfaces of rollers caused by abrasive particles and the number of particles acting on unit site of the surface of shredder rolls. The specific value determined by the ratio of wear to productivity of the shredder is used as the criterion of limit state of rolls by durability. The main factors of influence on specific wear are abrasive action of the mill material, mechanical properties of the roll material and kinematic characteristics and geometric parameters of the rolls. Relative difference in comparison of the calculated and experimental data of specific wear does not exceed 10 %, which indicates high accuracy of reflection by equation of real process. Consequently, the results of the research allow to control the wear process and to justify structural, technological and operational solutions to increase operational reliability of working elements of the roller shredder.
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