Working Gear Pump 

Overview

This fully functional 3D-printed gear pump demonstrates the core principles of fluid dynamics, mechanical engineering, and additive manufacturing. Designed for educational purposes, it serves as a hands-on tool to visualize how external gear pumps operate—showcasing the interaction between meshing gears, fluid displacement, and pressure generation.

The pump is 3D-printed, making it accessible for classrooms, workshops, and DIY engineering projects. Its design allows for easy assembly, disassembly, and experimentation, while its functionality proves the viability of 3D printing for mechanical systems.

Assembly & Usage

Required Tools & Components

• 6x M4 bolts (length ≥ 25 mm)
• 6x M4 nuts

Step-by-Step Assembly

1. Insert the Gears Place the two gears into the designated slots in the pump housing. Ensure they mesh smoothly without excessive friction.

2. Attach the Lid Align the lid with the housing and secure it using the 6x M4 bolts and nuts. Tighten evenly to avoid misalignment or leaks.

   Attach the Crank 

3. Function Test
   • Fill a container with water and submerge the intake port.
   • Manually spin the gears (e.g., by turning the shaft or gear) to prime the pump and observe fluid flow.
   • Check for leaks or irregular resistance. .

Safety Notes

• Manual Operation Only: The pump is designed for hand-powered testing (e.g., spinning by hand or with a crank). Avoid using electric tools, as uncontrolled speeds & electricity may cause damage or injury.
• Supervision Recommended: If used in educational settings, ensure students handle the pump under guidance.
• Material Limits: 3D-printed parts may have lower durability than metal components. Avoid excessive pressure or aggressive fluids (e.g., solvents).