Fuel Processing Device Having Magnetic Coupling and Method of Operating Thereof
A fuel processing device has a magnetic coupling that transfers rotational energy from a motor to a fuel homogenizer. The magnetic coupling has magnetic members that may be isolated from contact with fuel.
1 . A fuel processing device comprising:
a fuel homogenizer, wherein the fuel homogenizer comprises:
a stator;
a rotor mounted rotatably with respect to the stator, wherein a gap exists between the rotor and the stator;
an inlet in fluid communication with the gap between the rotor and the stator; and
an outlet in fluid communication with the gap between the rotor and the stator; and
a couplings wherein the coupling comprises:
a drive rotor having a first magnetic member;
a driven rotor having a second magnetic member;
a containment shell disposed between the first magnetic member and the second magnetic member, said containment shell at least partially enclosing the driven rotor, wherein a gap exists between the containment shell and the drive rotor and wherein the second magnetic member is surrounded by the driven rotor and is isolated from fuel transfer in the coupling; and
a shaft rotatably mounted about its longitudinal axis, wherein the shaft is rotatably coupled to the rotor of the homogenizer and to the driven rotor, wherein the first magnetic member transfers rotary motion of the drive rotor to the second magnetic member, thereby rotating the driven rotor.
2 . The fuel processing device of claim 1 , wherein the first magnetic member is exposed to the gap between the containment shell and the drive rotor.
3 . The fuel processing device of claim 1 , wherein the gap between the containment shell and the drive rotor is hermetically sealed at least in part by the containment shell and the drive rotor.
4 . The fuel processing device of claim 1 wherein:
an interior of the containment shell is in fluid communication with the gap between the rotor and stator of the fuel homogenizer; and
fuel flows from the homogenizer into the containment shell when the shaft rotates.
5 . The fuel processing device of claim 1 , wherein the drive rotor is rotatably mounted within a bearing bracket.
6 . The fuel processing device of claim 1 , wherein the shaft is mounted in at least one sleeve bearing.
7 . The fuel processing device of claim 1 , wherein the first magnetic member comprises at least one ring of magnets disposed on the drive rotor.
8 . The fuel processing device of claim 7 , wherein:
the second magnetic member comprises at least one ring of magnets disposed on the driven rotor; and
the second magnetic member is arranged concentrically with the first magnetic member.
9 . The fuel processing device of claim 1 , wherein:
the gap between the rotor and the stator has an inlet portion and an outlet portion; and
the size of the gap decreases from the inlet portion to the outlet portion.
10 . The fuel processing device of claim 1 , comprising:
a motor, wherein the motor is coupled to the shaft and provides rotational energy to the shaft, thereby rotating the rotor of the homogenizer.
11 . The fuel processing device of claim 10 , wherein the motor operates in a rotational speed range of about 1000-3000 RPM.
12 . A method of processing fuel, comprising:
providing a coupling having:
a drive element with a first magnetic member and a driven element with a second magnetic member, the drive element being magnetically coupled to the driven element by the first and second magnetic members; and
a containment shell disposed between the first and second magnetic members, said containment shell at least partially enclosing the driven element, wherein a gap exists between the containment shell and the drive element, and wherein the second magnetic member is surrounded by the driven element and is isolated from fuel transfer in the coupling;
providing a fuel homogenizer having a stator and a rotor rotatably mounted with respect to the stator, wherein the rotor of the homogenizer is rotatably coupled to the driven element of the coupling,
providing fuel to the homogenizer; and
providing rotational energy to the drive element, the rotational energy rotating the drive element and the first magnetic member, wherein the first magnetic member transfers rotational energy to the second magnetic member and rotates the rotor of the homogenizer.
13 . The method of claim 12 , wherein providing fuel comprises providing a plurality of fuel types to the homogenizer.
14 . The method of claim 12 , wherein providing fuel comprises providing a mixture of fuel and water to the homogenizer.