Циркуляція сипкого матеріалу в горизонтальних циліндричних робочих камерах віброапаратів

In industry, vibrating devices with box and cylindrical horizontal working chambers are used. The bulk material in such devices performs circulating motion in the plane perpendicular to the longitudinal axis of the vibrator. Currently, the most widespread in the industry are vibrating machines, the working bodies of which carry out harmonic oscillations. Thus the form of a trajectory of their oscillating movement can be various: direct, vertical or directed at an angle to horizon, an ellipse, a circle. The properties of the layer of bulk material change significantly under the action of vibration. In the vibrating fluidized bed there is a circulation of bulk material, which affects the processes of mixing, vibroabrasive processing, grinding, drying. The article presents a description of the developed experimental set-up, which consists of a universal vibrating stand and a model apparatus with interchangeable horizontal cylindrical working chambers, the axis of which is parallel to the longitudinal axis of the vibrator. The design of the vibrator of the universal vibrating stand allows to receive circular, elliptical and directed fluctuations of the model device. The developed method of measuring the oscillation parameters of the model vibrating apparatus is quite labor-intensive, but allows you to record with a cathetometer and photography the trajectory of oscillations and determine the amplitudes. To measure the circulation rate, labeled particles were added to the bulk material. The speed of circulation was determined by measuring the passage time of the labeled particles of the sector deposited on the glass of the model apparatus. The article presents the results of experimental study of the influence of oscillation parameters and geometric dimensions (diameter) of the working chamber of the horizontal apparatus, the axis of which is parallel to the longitudinal axis of the vibrator, on the circulation rate of bulk material. The experiments were performed on a model material - glass beads, which has good bulk properties. The dependence of the velocity of bulk material circulation on the relative acceleration of vibration and the diameter of the working chambers of the model apparatus is established.