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Forums
Engineering
Mechanical Engineering
Agitator Torque Calculation
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[QUOTE="Nickf_Zar, post: 6528545, member: 693342"] [B]TL;DR Summary:[/B] Calculating the torque required for an agitator/scraper. Hi All, I must calculate the torque and for an agitator motor. An anchor type agitator/scraper, removing crust off the edge of a tank. My instinct is the max or startup torque will be = (Moment of Inertia) x (Angular Acceleration) + (Drag force of the submerged impeller)* Max radius + (Frictional forces on the edge of the tank)* Max Radius [SIZE=6]Tmax = ( I * α ) + [ ( Cd * A * ρ * V² * ½ ) + (µ * F) ] * D/2[/SIZE] • The motor has a soft start but is operated at constant RPM. • The idea is to get a worst-case scenario to design from. • Please suggest if you think this problem can be solved with a better solution. I have very little experience with this type of stuff and would greatly the feedback. [B]My Questions to the community[/B] • Is this analysis correct? • What would be an acceptable coefficient of drag to use for a plate with cut-outs in it without doing an experiment • What would be an acceptable coefficient of friction to use, for the solidified sealing compound attached to the walls? [B]Thank you[/B] [/QUOTE]
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Agitator Torque Calculation
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