Magnet-Sleeve-Sealed Mini Trochoidal-Gear Pump Prototype with Polymer Composite Gear

The paper aims to show the technological path followed from the concept, design, and model to the manufacture of the first prototype, where the analytical and simulation studies are not always directly mirrored in the prototype performance indexes. [...]the aim of the mini trochoidal-gear pump is to achieve an average volumetric flow rate at a low rotational speed with satisfactory volumetric efficiency together with being leakage-free (sleeve sealed) and reducing air-borne noise (compact and polymer material). [...]from the magnet rotor to the outlet of the pump, the working fluid is guided outside of the sleeve through another conduction drilled in the pump body. Since the brushless motor is a part of the mini pump, the ‘in-out sleeve passageway’ additionally has the function of heat dissipation to ensure its operation within the defined temperature limits. [...]the torque to rotate the gear set is not intended for working as a gearbox, but working as a part of a hydraulic pump. [...]the outer gear could rotate guided in the interior of a bearing seat made of bronze located in the pump housing in continuous sliding contact of its external wall of perimeter πDc and thickness H [23].