DETERMINATION OF THE ROTARY DRUM MIXER DRIVE POWER

Abstract

The purpose of the research is to substantiate the design parameters of the drum mixer to improve the distribution of components in the volume of mixture, taking into account energy consumption. Obtaining mixtures with the specified parameters is important both for the agro-industrial complex and construction activities. For effective use mixtures of feed components are used. Crumbled mixtures are the most widespread and used. One of the least energy - consuming type of mixers is a rotating container-a drum mixer. The method involved conducting experimental studies and subsequent statistical processing of the results to obtain regression equations. The sedate and polynomial dependences of power consumption on the height and number of blades, installation angles of the lower and upper wings of the blades were revealed. The change in power consumption is insignificant, it fits into the operating zone of the drive motor with a capacity of 1 kW. The effect of the blade height in the range of 0.125...0.175 m on power consumption is insignificant. The influence of the number of blades is more critical. As the number of impellers increases, the power consumption decreases by 18%. If the number of impellers is more than six, the power consumption is not reduced. Angle b change of the lower wing of the impeller relatively to the tangent in the range of 30...40 degrees also does not significantly affect the power consumption. Further increase (up to 55 degrees) of this angle slightly increases its value (up to 2%). Angle g change of the upper wing position relatively to the tangent in the range 0...45 degrees affects the power by less than 1%. The highest power consumption corresponds to the upper wing angle of the impeller relatively to the tangent g = 10...20 degrees.