Evaluation of hydraulic forces, shaft bending moments, minimum shaft diameter matching standard commercial bar stock sizes, and weight calculations. Safety Check Guard: A pass/fail summary box displaying: Actual Speed vs. Critical Speed ratio. Combined stress vs. Allowable material stress limit. Impeller tip speed class (low, medium, or high shear).
This section calculates the hydraulic performance.
This public link is valid for 7 days and shares a thread, including any personal information you added. This link or copies made by others cannot be deleted. If you share with third parties, their policies apply. Can’t copy the link right now. Try again later.
Before running calculations, a repackaged spreadsheet requires specific process and geometry inputs. These are typically divided into three categories: Vessel Geometry The internal diameter of the mixing vessel. Liquid Height ( ): The height of the liquid volume being agitated. agitator design calculation xls repack
The shaft must never operate close to its natural resonant frequency, known as the critical speed. The operating speed (
To build or use an agitator design calculation sheet, you must first define the process fluid and vessel geometry. These inputs form the baseline for all fluid dynamics calculations. Fluid Characteristics Calculated in kg/m3kg/m cubed lb/ft3lb/ft cubed , affecting the dead weight and total power draw. Dynamic Viscosity ( ): Measured in
The impeller diameter is typically sized relative to the tank diameter ( Combined stress vs
Mt=P2π⋅Ncap M sub t equals the fraction with numerator cap P and denominator 2 pi center dot cap N end-fraction Mtcap M sub t = Torque ( = Calculated power ( WattsWatts = Rotational speed ( rev/srev/s 4. Mechanical Design and Shaft Sizing
): Ensure the calculated bulk fluid turnover rate aligns with the required process blend time ( Verify that
To streamline this complex process, engineers heavily rely on standardized calculation tools. This comprehensive guide explores the core principles of agitator design calculations and demonstrates how a structured Excel spreadsheet () toolkit can optimize your engineering workflow. 1. Fundamentals of Agitator Design This section calculates the hydraulic performance
wide) unless evaluating high-viscosity laminar systems where baffles are omitted.
Verification of shaft deflection at the mechanical seal or packing gland faces. Evaluation of critical speed vs. motor operating speed. Tab 4: Reference Data (The Backend)
provide breakdown reviews of Reynolds number analysis and loss factors (typically 10% for gland losses and 20% for transmission). Mobile Apps Agitator Design Pro
Sizing the shaft, gearbox, and motor to withstand torsional and bending stresses without hitting critical resonant frequencies. 2. Input Parameters Needed for the XLS Tool