Abstract
The paper presents the results of experimental analysis features of rotation of two unbalance vibration exciters that excite oscillations of a chain-type two-mass oscillatory system in order to identify stability of synchronous modes of the debalances rotation near the system resonances (in application to analysis of resonant vibrating machines dynamics). Experimentally obtained amplitude-frequency characteristics of the model, velocities and mutual phase shift of rotation of the debalances are analyzed. Areas of stable synchronous rotation of the debalances and types of their self-synchronization are revealed as dependence of both the frequency of voltage supplying to the electric motors and the imbalances value. It is shown that when approaching the resonant frequencies, both the debalances rotational speeds and their mutual phasing appear to be unstable.
Highlights
The effect of self-synchronization of unbalance vibro-exciters is widely used in vibration excitation systems for various technological vibrating machines with several exciters [1,2,3,4,5,6,7,8]
The literature devoted to theoretical analysis of self-synchronization of unbalance vibro-exciters in various mechanical systems is quite extensive [2, 9,10,11,12,13,14,15,16,17]
The problems of self-synchronization of two exciters in single and multiple degree-of-freedom systems are considered in [2, 7, 8, 11, 13, 15,16,17], and the conditions for existence of synchronous rotation modes for single-mass and two-mass oscillatory systems are obtained
Summary
The effect of self-synchronization of unbalance vibro-exciters is widely used in vibration excitation systems for various technological vibrating machines with several exciters [1,2,3,4,5,6,7,8]. The dynamical scheme under consideration corresponds to a number of machines which are practically used for crashing, screening, transportation, and some other technological operations [2,3,4, 7, 8, 15] Such studies are necessary since the existing literature provides no data concerning the instability of self-synchronization of unbalance exciters in a wide range of excitation frequencies, and especially near the resonances. To reveal the main features of the dynamics of such systems, the authors analyze the rotational speeds and the angles of the mutual phasing of the debalances at different excitation frequencies of the oscillations and at different values of the imbalance Their rotational speed is controlled by changing the frequency of voltage supplied through the inverter to the winding of the induction motors with a squirrel-cage rotor
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
