Micromotor and micropump
AssigneeFraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.
InventorsThomas Weisener, Gerald Voegele, Mark Widmann, Carlo Bark, Andreas Hoch
Life of this patent
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Abstract
The invention concerns a micropump for the substantially continuous delivery of a mass flow, the micropump having a sleeve axis and an offset axis of rotation. An internal rotor meshes with an external rotor in a sleeve and at least one outlet-side pressure opening in a first end-face termination part. Both rotors have a dimension smaller than 10 mm. The invention further concerns a micromotor of similar construction in which the diameter of the rotors and the casing are below 10 mm. The pump and motor are extremely miniaturized yet still permit a continuous flow with high feed pressure and high output.
Claims19
Micropump of miniature size, said micropump comprising a sleeve casing, an axis of said sleeve casing, an axis of rotation and an inner rotor provided with teeth, said micropump having at least one outlet pressure opening to extend in a direction of said axes, whereby both axes are radially offset with respect to each other and
- (a) said sleeve casing having a diameter of less than 10 mm and said inner rotor is in a meshing engagement with an outer rotor such that each tooth of said inner rotor forms an axially extending sealing line on an inner surface of said outer rotor;
- (b) said at least one outlet pressure opening is provided in a first face end part, terminating and attached to said sleeve casing;
- (c) both, said inner rotor and said outer rotor having a diameter of less than 10 mm, to substantially continuously convey a mass flow upon a rotational movement of the sealing lines.
Micromotor of miniature size, comprising
- (a) an inner rotor provided with a meshing engagement to an outer rotor, said two rotors being interposed between two axial termination parts arranged opposite and axially spaced apart from each other;
- (b) a sleeve casing having a diameter of less than 10 mm, an axis of said inner rotor and an axis of said sleeve casing being offset with respect to each other, said offset being less than 10 mm;
- wherein
- (c) one of an extension of said sleeve casing and one of said two axial termination parts being adapted to be fixed to an inlet tubing, to supply a driving fluid through said tubing to an inlet opening of one of said axial termination parts and between said rotors for providing a rotational force upon a streaming driving fluid.
Assembly method for one of a micropump and a micromotor, said micropump and micromotor having components of cylindrical shape and having an axial assembly direction, said method comprising:
- (a) providing first and second axial termination parts and a casing having a diameter of less than 10 mm;
- (b) assembling said first and second termination parts along a first direction to said casing;
- (c) providing an inner rotor and an outer rotor having a diameter of less than 10 mm and having axes offset in relation to each other;
- (d) assembling said rotors along a second direction into said casing prior to assembling the axial termination parts;
- first and second directions being along the axial assembly direction.
Dependencies are inferred from the claim text.