Axial fluid flow inducing device with multiple magnetically driven impellers
AssigneeAir Concepts, Inc.
InventorsEdward L. Lopatinsky, Saveliy T. Rosenfeld, Daniel Schaefer
Life of this patent
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Abstract
A multiple impeller flow inducing device in which driver coils are intermittently energized in timed relation to rotation of the impellers to interact with permanently magnetized portions of the impeller to rotate the same. The impellers can be rotated in opposite directions or in the same direction. A two section impeller construction allows each section to be magnetized in opposite pole orientation and when assembled creating alternate pole orientations of successive portions, arcuate segments forming a shroud or the type of blades can be magnetized to provide the impeller magnetized portions. Stator guide vanes can be interposed between successive impellers.
Claims35
An axial fluid flow inducing device comprising:
- a housing;
- a plurality of aligned impellers disposed within said housing, and each of said impellers mounted in said housing for rotation about a common axis;
- each of said impellers having a series of radially extending blades;
- a magnetically permeable enclosing structure surrounding said impellers and defining a fluid flow passage;
- magnetic drive means for each impeller comprising impeller portions permanently magnetized so as to establish radially spaced magnetic poles, an outer pole of each portion located at an outer region of each impeller, each successive outer pole having an opposite polarity from each adjacent pole;
- said magnetic drive means further including pulsed magnetic field generating means comprising electromagnetic driver coil means disposed adjacent an outer perimeter of each of said impellers, said pulsed magnetic field generating means establishing a magnetic field with a pole adjacent said outer poles of said magnetized portions of each of said impellers when energized with electrical power;
- circuit means causing pulsed energization of said driver coil means so as to alternately cause opposite magnetic poles to be established thereby in timed relationship to rotation of said magnetized portions of said impellers to produce rotation thereof by magnetic attraction and repulsion;
- wherein said impellers are mounted for independent rotation with respect to each other;
- wherein said magnetic drive means interacts with each of said impeller magnetized portions to produce said independent rotation;
- and
- wherein one magnetic drive means causes rotation of two of said impellers in opposite directions.
An axial fluid flow inducing device comprising:
- a housing;
- a plurality of aligned impellers disposed within said housing, and each of said impellers mounted in said housing for rotation about a common axis;
- each of said impellers having a series of radially extending blades;
- a magnetically permeable enclosing structure surrounding said impellers and defining a fluid flow passage;
- magnetic drive means for each impeller comprising impeller portions permanently magnetized so as to establish radially spaced magnetic poles, an outer pole of each portion located at an outer region of each impeller, each successive outer pole having an opposite polarity from each adjacent pole;
- said magnetic drive means further including pulsed magnetic field generating means comprising electromagnetic driver coil means disposed adjacent an outer perimeter of each of said impellers, said pulsed magnetic field generating means establishing a magnetic field with a pole adjacent said outer poles of said magnetized portions of each of said impellers when energized with electrical power;
- circuit means causing pulsed energization of said driver coil means so as to alternately cause opposite magnetic poles to be established thereby in timed relationship to rotation of said magnetized portions of said impellers to produce rotation thereof by magnetic attraction and repulsion;
- wherein said magnetic drive means includes at least two angularly spaced electromagnetic driver coils for each impeller, each driver coil having a U-shaped core, said U-shaped core of each driver coil having a pair of legs extending generally radially, a pair of angularly spaced electromagnetic driver coils mounted around the outer perimeter of each impeller;
- and
- said core legs of each driver coil extend at an angle to each other which is the same as an angle between successive blades of each impeller.
The device according to 26 wherein there is an angle C between the center of said two driver coils equal to:
- C (in degrees)=180(2k+1)/N+360f/N
- where N is the number of permanently magnetized blades of each of said impellers;
- and, k and f are any whole numbers.
The device according to 26 wherein said driver coils of two adjacent impellers placed along rotation axis, or shifted divisibly by angle between two blades, to provide position of blades between said core legs of pair of driver coils of adjacent impellers at start up position;
- said pair of first driver coils are energized by switching at start up so as to establish opposite magnetic polarity while blades between said core legs are the same polarity, or so as to establish the same polarity while said blades are opposite polarity;
- second driver coil of the pair associated with first impeller is energized so as to establish opposite magnetic polarity relatively to the first one at the second switching;
- second driver coil of the pair associated with second impeller is energized so as to establish the same magnetic polarity relatively to the first one at the second switching to rotate adjacent impellers in opposite directions.
Dependencies are inferred from the claim text.