Many engineers have downloaded free .xls files from forums or university repositories. Most of these suffer from three fatal flaws:
This is where most generic spreadsheets fail. An agitator shaft must avoid resonant vibration.
Agitator Design Calculation: A Comprehensive Guide to Spreadsheet-Based Mixing Optimization
: Standard practice is to add 10% for gland losses and 20% for transmission losses to select the final motor horsepower (HP). 4. Shaft Mechanical Design agitator design calculation xls repack
The power required to drive an impeller is calculated using the power number ( Npcap N sub p ) formula:
The spreadsheet instantly processes the data:
Q: What are the common agitator design calculations? A: Common agitator design calculations include power calculation, torque calculation, shaft sizing, and impeller sizing. Many engineers have downloaded free
The following example XLS sheet illustrates a basic agitator design calculation:
This article provides a comprehensive overview of agitator design calculations, focusing on the utility of Excel (XLS) tools for streamlining the engineering process, including methods for handling "repack" or re-impeller projects.
Do you require equations for (like critical speed) or just the process power sizing ? Share public link ∼0.3tilde 0.3 for hydrofoils
A robust, repackaged industrial XLS calculation workbook should be modularized across several tabs to ensure maintainability and eliminate verification errors.
) represents the power delivered directly to the fluid (shaft power). To size the actual electric motor, the spreadsheet must account for mechanical losses:
: Choose from common designs like Pitched Blade Turbines, Rushton 6-Blade, or Propellers. Impeller Diameter ( : Typically calculated using a ratio, often ranging from 0.3 to 0.5. 2. Enter Fluid Properties
P=Np⋅ρ⋅N3⋅D5cap P equals cap N sub p center dot rho center dot cap N cubed center dot cap D to the fifth power = Power required ( WattsWatts Npcap N sub p = Impeller Power Number (e.g., ∼0.3tilde 0.3 for hydrofoils, ∼1.27tilde 1.27 for pitched blade turbines, ∼5.0tilde 5.0 for Rushton turbines).