Agitator Design Calculation Xls

| Cell Ref | Parameter | Value | Unit | | :--- | :--- | :--- | :--- | | B3 | Tank Diameter ($T$) | [User Input] | m | | B4 | Liquid Height ($H$) | [User Input] | m | | B5 | Fluid Density ($\rho$) | [User Input] | kg/m³ | | B6 | Fluid Viscosity ($\mu$) | [User Input] | cP | | B7 | Required Speed ($N_rpm$) | [User Input] | rpm | | B8 | Impeller Diameter ($D$) | [User Input] | m | | B9 | Impeller Type | [Drop Down List] | - | | B10 | Shaft Material Allowable Stress | [User Input] | MPa |

The shaft must withstand the torque transmitted from the motor to the impeller. agitator design calculation xls

Torque ($\tau$): $$\tau = \fracP2 \cdot \pi \cdot N$$ | Cell Ref | Parameter | Value |

Shaft Diameter ($d$): Assuming a solid shaft and using the shear stress formula: agitator design calculation xls

$$d = \left( \frac16 \cdot \tau\pi \cdot S_s \right)^1/3$$

Where $S_s$ is the allowable shear stress of the shaft material (e.g., Stainless Steel 316 typically $\approx 40-60$ MPa).

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