Динамические эффекты, проявляющиеся в механической системе вибрационного измельчителя кормового зерна

Abstract

In the mechanical system of the proposed fodder grain grinder, two dynamic effects are manifested: anti-resonance of a two-mass system and self-synchronization of unbalanced rotors. These effects occurring simultane-ously in one machine are constantly opposed to each oth-er. Indeed, anti-resonance leads to small vibrations of the first mass to which the vibration exciters are rigidly at-tached. Self-synchronization of vibration exciters requires large oscillations of this mass as a common carrier body through the oscillations of which self-synchronization is carried out. On the other hand, in the theory of synchroni-zation, the paradox of inoperative connections is known which states that during synchronization of vibration excit-ers the carrier body may be motionless and begins to oscil-late only if the synchronous phasing of the rotors is violated for some reason. Therefore, the research goal is to exper-imentally confirm the joint manifestation and “coexistence” of these effects in the proposed crusher, as well as to study the possibility of their use for technological purposes. A mathematical model of vibrations of the working bodies of a vibratory fodder grain crusher was obtained taking into account its design features and the interaction of the work-ing bodies with the technological environment. It is theoret-ically determined and experimentally confirmed that in the mechanical system of a vibratory fodder grain crusher, two dynamic effects are manifested: anti-resonance of a two-mass system and self-synchronization of unbalanced roranges of the working bodies. The rotations of the vibration exciter rotors are synchronous-cophased that has a posi-tive effect on the functioning of the crusher.