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ArticleName Dynamics of vibratory cone crusher based on three-mass system
DOI 10.17580/or.2015.06.05
ArticleAuthor Kazakov S.V., Shishkin E. V.

REC «Mekhanobr-Tekhnika» (Russia):

Kazakov S. V., Ph. D. in Engineering Sciences, Leading Design Engineer,


National Mineral Resources University (Mining University) (Russia):

Shishkin E. V., Ph. D. in Engineering Sciences, Associate Professor, Vice-Head of Chair,


Taking into consideration severization of requirements to vibratory machines with respect to throughput rate, reliability and compact design, their improvement becomes increasingly important and difficult task. One of the promising ways to improve vibratory machines is changeover from one-mass and two-mass machines to machines based on three-mass system. A vibratory cone crusher based on two-mass system is distinguished by a number of advantages in comparison with one-mass machines. With that, it suffers from one significant deficiency: during operation impact loads are bound to recur, producing an extremely detrimental effect upon machine’s elements that are non-functioning directly in impact, in particular, on vibration exciters and their bearings. Creation of vibro-impact crusher based on three-mass system will permit to considerably decrease dynamic loads on bearings of vibration exciters’ rotors owing to so-termed vibration damping effect, that may almost completely isolate crusher’s foundation from unbalanced dynamic forces. In order to improve mechanical and performance parameters of vibratory cone crusher, a design model of machine based on three-mass system is proposed. Crusher’s body and cone vertical-plane oscillations are generated by a pair of inertial vibration exciters, installed on vibrating platform, which, in turn is supported on immovable foundation through vibration isolators of low stiffness. Differential equations of crusher’s motion, describing vertical-axis free-oscillation modes of crusher’s body and cone, as well as vibrating platform, are derived. Solution of these equations permitted to establish the expressions for machine’s natural frequencies and free-oscillation modes, analysis of which provides for assessment of its forced oscillation mode, specifically: to determine resonance frequencies and ratios of body and cone oscillation amplitudes to that of vibrating platform.
The work was performed with the financial aid from the Ministry of Education and Science of the Russian Federation for the Project No. 14.579.21.0048 UIPNI RFMEF157914X0048. R&D registration number 114093070077.

keywords Three-mass system, vibratory crusher, free-oscillation mode, natural frequency, oscillation mode, amplitude, inertial vibration exciter

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