If you're looking for a centrifugal pump CAD model, here are the best ways to obtain or create one:
| Source | Format | Details |
|---|---|---|
| GrabCAD (grabcad.com) | STEP, STL, IGES | 1000+ pump models (impellers, casings, assemblies) |
| TraceParts (traceparts.com) | DWG, STEP | Commercial pump models (Grundfos, KSB, etc.) |
| 3D ContentCentral (3dcontentcentral.com) | SOLIDWORKS, Parasolid | Supplier-uploaded models |
| Thingiverse (thingiverse.com) | STL (3D printable) | Simple impeller designs |
| Source | Format | Cost |
|---|---|---|
| CADENAS (PARTcommunity) | STEP, IGES | Free (registration) |
| TurboSquid (turbosquid.com) | OBJ, STL | $20–$200+ |
| McMaster-Carr (mcmaster.com) | STEP, DXF | Free with product specs |
| Software | Best For | Learning Curve |
|---|---|---|
| SolidWorks | Parametric design, CFD integration | Moderate |
| Autodesk Inventor | Industrial pump modeling | Moderate |
| Fusion 360 | Free for hobbyists, cloud-based | Easy |
| FreeCAD | Open-source (basic modeling) | Steep |
| Blender | Organic shapes (impeller optimization) | Hard |
Impeller Design
Sketch blade profile (use velocity triangle calculations).
Apply helical sweep or lofted surface for 3D blades.
Example: Backward-curved blade tutorial.
Volute Casing Design
Use spiral equation (logarithmic or Archimedean).
Ensure smooth transition to discharge nozzle.
Assembly
Mate impeller to shaft, align with casing.
Check clearances (0.1–0.5mm for small pumps).
CFD Validation (Optional)
Simulate flow in ANSYS Fluent or SolidWorks Flow Simulation.
Simplified Impeller (Download STEP)
Complete Pump Assembly (Download SOLIDWORKS)
Use STL files from Thingiverse or design your own.
Materials:
PLA (prototyping only, not waterproof).
PETG/Nylon (water-resistant, low-pressure use).
Resin (SLA) (smooth finish, but brittle).
ISO 5199: Dimensions for centrifugal pumps.
ASME B73.1: Standard for chemical process pumps.
If you need a tailored CAD model for a specific:
Flow rate (Q)
Head (H)
NPSH requirement
Material (stainless steel, cast iron, etc.)
Reply with your specs, and I can guide you through the design process!
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