Authors : R. Yarullin, R. Aipov, I. Gabitov, A. Linenko, S. Akchurin, R. Safin, S. Mudarisov, E. Khasanov, Z. Rakhimov, Z. Rakhimov and I. Masalimov
Abstract: Vibration machines due to their advantages have found wide application in all fields of technology and are now regarded as the basis of the technology of the future. The researchers give preference to the superresonance vibro-machines. However, it is inherent in them to increase the resonant amplitudes during start-up and stoppage. The greatest application was found for vibro-machines with inertial vibrators driven by asynchronous motors. The main kinematic parameters of vibration are the frequency and amplitude of the vibrations of the working element. The application of vibration in the agricultural sector has been most studied in the processes of releasing seeds of cultivated plants from difficult-to-separate impurities and similar weed seeds. In this case, it is required to smoothly adjust the amplitude from the oscillation frequency according to, the hyperbolic dependence. If the regulation of the oscillation frequency of the operating element can be effectively carried out by a frequency-controlled asynchronous electric drive, the amplitude of the oscillations is established basically by changing the weight of the eccentric mass manually and only during the stoppage of the machine. Therefore, automation of amplitude reduction with increasing frequency during the operation of the machine according to the hyperbolic law is actual. A vibrator with a vertical axis of rotation of the eccentric mass has been developed which limits the resonance amplitudes but it only partially ensures the required control law. Simultaneous regulation of the oscillation amplitude of the working element with frequency change is proposed to be carried out by an automatic inertial vibrator with spring-loaded counter eccentric masses which extend in accordance with the speed. A mathematical model is obtained, a calculation technique is developed and the design parameters of the automatic vibrator are calculated. The mechanical characteristic of a vibrator with an automatic vibrator is specified and the mechanical characteristics of a vibrator with both a base and an automatic vibrator are calculated.
R. Yarullin, R. Aipov, I. Gabitov, A. Linenko, S. Akchurin, R. Safin, S. Mudarisov, E. Khasanov, Z. Rakhimov, Z. Rakhimov and I. Masalimov, 2018. Adjustable Driver of Grain Cleaning Vibro-Machine with Vertical Axis of Eccentric Masses Rotation. Journal of Engineering and Applied Sciences, 13: 6398-6406.