Modeling of the process of isolation of particles of dust from air and determination of efficiency rotary dust drawer

Authors

DOI:

https://doi.org/10.30838/P.CMM.2415.250918.215.155

Keywords:

rotary saw, rotor, blade, inter-blade axial vortex, movement of dust particles, electrohydrodynamic analogy method

Abstract

Purpose. Improving sanitary and hygienic working conditions due to better air purification and reduction of the energy intensity of the process of dedusting air in the cabs of agricultural machines due to the substantiation of the technological and design parameters and operating modes of the high-performance  rotary dust separator.  Method.  The  method of  electrohydrodynamic analogies (EGDA) allows experimentally, using simulation, to solve various problems of potential air  movement. This method involves the creation of a model with a certain electrically conductive material, as a rule, geometrically similar to this part of the air movement. Results.  The drawbacks of the existing dust separation means are revealed and their improvements are carried out by improving the rotary dust separator and developing a new shape of the blades with a notch in the middle part, which will increase the efficiency of the rotary dust separator by increasing the separation of dust particles 3 microns in size. Also, using EGDA, trajectories of  movement of dust particles in the rotor channels were constructed. By selecting the number of blades and their angle of inclination, the maximum efficiency of the dust separator is determined. The regularities of the process of separation of dust particles in the rotor channels are established and the dependencies for calculating the rotary dust separator are determined.  Scientific novelty.  On the basis of theoretical studies and studies using electrohydrodynamic analogy (EGDA), the shape of the inter -blade axial vortex (Taylor vortices), which occurs when air flows in the rotor channels and affects the law of distribution of flow velocities, is determined. Developed mathematical relationships to determine the effectiveness of the deposition of dust particles on the rotor blades and remove them in a dust collector, depending on their size, rotor diameter, length and number of blades, rotor speed and dust separator performance. On the basis of theoretical and experimental studies, rational modes of operation of the rotary dust separators in the vent ilation systems of agricultural machinery cabs have been established.  Practical meaningfulness.  A new form of rotor blades with a notch in the middle part has been proposed, which will increase the efficiency of the rotary dust separator by increasing the separation of dust particles 3 microns in size.

Author Biographies

S. D Mazilin, Department of Civil Security, Tavriya State Agrotechnological University, 18, B. Khmelnitsky st., 72310, Melitopol, Ukraine

Ph.D.  (Tech.), Assoc. Prof.

O. V. Yatsukh, Department of Civil Security, Tavriya State Agrotechnological University, 18, B. Khmelnitsky st., 72310, Melitopol, Ukraine

Ph.D. (Agric.), Assoc. Prof.

I. N. Mokhnatko, epartment of Civil Security, Tavriya State Agrotechnological University, 18, B. Khmelnitsky st., 72310, Melitopol, Ukraine

Ph.D.  (Tech.), Assoc. Prof

References

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Published

2018-09-25

Issue

Section

Life Safety