Synchronous-synphase mode of operation of a vibrating jaw crusher with non-rigid mounting of vibrating exciters

Abstract

The dynamics of the modernized vibrating jaw crusher is investigated The distinctive feature of the improved dynamic scheme of the crusher from the traditional one is that the centers of rotation of the self-synchronizing vibrating exciters are set in the tops of the articulated rod parallelograms, but not on the jaws. One of the opposite ends of the neighboring rods is hinged to the cheek, and the other is connected to the frame by means of an additional torsion. It is shown that in such a machine the natural frequency of free vibrations of the supporting system can be significantly increased and the dynamic loads on the bearings, including the shock type, can be reduced. In addition, with increasing the distance between the axes of vibration exciters, the stability margin of the synchronous-synchronous mode of operation in the preresonant and overresonant frequency ranges increases, and there is a possibility of implementing this mode in the interresonant frequency range. Operating experience of the modernized crushers in Russia and abroad confirmed their effectiveness and stability in operation, which is a practical test of the developed theory.