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Mechanical system dynamics of tumbling mill drives under steady-state operation

Fedin D., Vinogradov B.

Zeszyty Naukowe. Transport / Politechnika Śląska

2018

z. 99

43--52

In tumbling mill drives, increased dynamic loads may occur in open gearing, which may cause an increase in the vibratory activity of the drive assembly and in dynamic loads in the mechanical drive system as a whole. Today, no adequate method is available for calculating the dynamic loads in the open gearing of tumbling mills. The article is devoted to the development of a method for dynamic load calculation, which takes into account the parameters of the drive system. The authors have proposed a mathematical model and a technique that allows for the identification of dynamic loads from experimental data and controlling the vibratory activity of the mechanical drive system of a tumbling mill at the design stage.

Substantiation of key parameters of a centrifugal mill intended for grinding solid residue from the pyrolysis of used automobile tyres

Ostashko I., Vinogradov B.

Zeszyty Naukowe. Transport / Politechnika Śląska

2016

z. 91

133--141

The study presents the results of an investigation into centrifugal mills with an energy-saving working body. Rational geometric parameters of the working body of the centrifugal mill, which grinds the solid residue from the pyrolysis of used tyres, have been justified on the criterion of the lowest specific energy consumption during the grinding process. A method to determine the dependence of the in-grinding power consumption on the basic parameters of the working body has been developed, while an analytical expression to determine the power consumption for grinding the solid residue from the pyrolysis of used tyres has been obtained. It has been found that the power consumption in the grinding process linearly depends on the rotational speed of the working body, which is to the 0.3 power on the average size of solid particles.