Disturbances in Self-Synchronisation of Vibrators in Vibratory Machines

Abstract

DISTURBANCES IN SELF-SYNCHRONISATION OF VIBRATORS IN VIBRATORY MACHINES ZABURZENIA SAMOSYNCHRONIZACJI WIBRATORÓW W MASZYNACH WIBRACYJNYCHAn influence of elastic support elements arrangements and ratios of elasticity and damping constants in vertical and horizontal direction on self-synchronisation accuracy was investigated in the paper. The obtained results of the other factors influence on disturbances in self-synchronisation of vibrators in vibratory machines are also presented. Especially, influence of a diversification of driving and anti-torque moments, not central direction of the resulting force of the vibrators set , the local flexibility of mounting of vibrators to the machine body and influence of collisions with a feed were described. Keywords: vibratory machines, self-synchronisation, phase incompatibility of vibrators motion W pracy zbadano wpływ rozmieszczenia elementów sprężystych zawieszenia i proporcji pomiędzy stałymi sprężystości i tłumienia tych elementów na kierunkach pionowym i poziomym na dokładność samosynchronizacji wibratorów. Przytoczono też rezultaty badań autorów nad wpływem innych przyczyn na zaburzenia samosynchronizacji wibratorów maszyn wibracyjnych. W szczególności określono wpływ na zjawisko samosynchronizacji takich zjawisk jak: zróżnicowanie momentów napędowych i oporowych, niecentralne ukierunkowanie wypadkowej siły wymuszającej zespołu wibratorów, lokalna podatność zamocowania wibratorów do korpusu maszyny i oddziaływanie zderzeń z nadawą.Słowa kluczowe: maszyny wibracyjne, samosynchronizacja, niewspółfazowość ruchu wibratorów

A rotary valve controlled electro-hydraulic vibration exciter

“…From equations (17), (18), and (19), the transfer function between the piston displacement Y p and the load flow Q L is expressed as…”

“…Waveform is clearly critical for vibration technology, therefore waveform analysis is an important and fundamental research on vibration exciter when sinusoidal waveform is required. Analysis of the waveform can be approached from two viewpoints: [17][18][19][20] (i) study the accuracy of displacement, velocity, and acceleration; (ii) investigation the change regularity of the waveform as frequency increases. However, until now, no parameter is available for defining and evaluating the waveform quality which can be explained by the distortion of the waveform as compared with sinusoidal waveform.…”

Self-synchronization of drive vibrators of an antiresonance vibratory conveyor

“…Fundamental works in this area were published by Blekhman (1971Blekhman ( , 2000. He formulated, among other concepts, the stability criterion for synchronized motion of unbalanced masses and, on its basis, developed detailed rules for constructing drive structures of inertial vibrators, which were cited later in papers by several authors (Michalczyk and Cieplok, 2014;Hou et al, 2017;Li et al, 2020).…”

Research of Multi-Mode Pneumatic Vibroactuator

“…Meng et al [16] deal with the synchronized motion trajectory tracking control problem of multiple pneumatic cylinders. Michalczyk and Cieplok [17] investigated the influence of elastic support element arrangements and ratios of elasticity and damping constants in vertical and horizontal directions on selfsynchronization accuracy. Zhao et al [18] analyzed the synchronization of two exciters, which stems from the load coupling that produces the torque of general dynamic symmetry to force the phase difference between the two exciters close to the angle of general dynamic symmetry.…”