Calculation of power absorbed at agitator shaft

  • #1

Main Question or Discussion Point

I have with me an existing Agitator details of which are as below

Motor= 2.2KW/ 3 HP, 1440 Rpm
Gear Reducer = ratio 40/1
Agitator Shaft RPM= 36
Agitator Shaft dimension
Length = 2500mm round bar , SS 304
Blades = 5 nos, 100 mm wide, 5 mm thick, dia = 2200 mm, at a distance of 400mm each, ss 304
weight of the agitator shaft & impeller assembly = approx 177 lbs
Purpose of agitation : Alum tank agitator
density ~ 1.3 - 1.4

Now i need the one more exact assembly to increase the capacity of my Plant, however i have no clue how to derive the absorbed power at the agitator shaft or the torque requirement to drive the agitator shaft. I have basic knowledge of gear reducer selection for which i need to calculate the absorbed power.

Can someone please suggest how to do that.
Also is it possible to directly select the Gear reducer based on the motor input KW ? If so then how ?

Thanks in advance.
 

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