초록 ▼

An underwater generator contains a three-phase electromagnetic coil system imbedded in a stator to form an external face surface perpendicular to its axis. A rotor contains radial vanes and a system of alternating permanent magnets imbedded onto a peripheral ring outside of the vanes so as to form a

An underwater generator contains a three-phase electromagnetic coil system imbedded in a stator to form an external face surface perpendicular to its axis. A rotor contains radial vanes and a system of alternating permanent magnets imbedded onto a peripheral ring outside of the vanes so as to form an internal face surface positioned next to the external face surface and forming an axial gap therebetween. The rotor also contains a series of radial channels connecting the central area of the hollow shaft to the area of the axial gap. The rotor is spring-loaded and is capable of moving along its axis so that the axial gap can be changed. An auxiliary pump is provides to pump water into the axial gap and therefore create a hydrostatic pressure on the rotor to counteract the electromagnetic attraction forces generated during the operation of the device. The flow of the auxiliary pump is chosen in such a way as to maintain the axial gap within the range of 0.15 to 0.20 mm regardless of the incoming water current or any wear of the generator components. Such wear may result from abrasion caused by the sand or other particles carried by the water current. The underwater generator can be used most advantageously in small rivers and other similar sources of water currents frequently contaminated with sand particles. The generator of the invention has long operational life and maintains high efficiency of energy generating over a wide range of operating parameters.

대표청구항 ▼

1. An underwater generator comprising: a stator with an external stator face surface, said surface oriented perpendicular to its central axis line, said stator containing an electromagnetic coils means sealingly imbedded therein and positioned against said external face surface, said electromagnetic

1. An underwater generator comprising: a stator with an external stator face surface, said surface oriented perpendicular to its central axis line, said stator containing an electromagnetic coils means sealingly imbedded therein and positioned against said external face surface, said electromagnetic coils means adapted to generate electricity when said external stator face surface is in a vicinity of passing alternating magnetic poles, said stator further including an axis aligned with said central axis line;a rotor, including a spring-loaded shaft capable of turning about and axially moving along said axis, said shaft containing an opening in fluid communication with the water flow, a rotary vane system radially extending from said shaft for causing a rotation of said rotor when in a water current, a system of alternating permanent magnets sealingly imbedded in said rotor to form an internal rotor face surface, said surface oriented perpendicular to said central axis line and in a close proximity to said external stator face surface to form an axial gap therebetween, said rotor further incorporating a series of radial channels to fluidly connect said shaft opening to said axial gap; andan auxiliary pumping means connected to said channel system to provide a predetermined amount of flow into said axial gap.2. The underwater generator as in claim 1, wherein said spring-loaded shaft is biased in a direction against said water current.3. The underwater generator as in claim 1, wherein said electromagnetic coils system further comprising a magnetic core incorporating a plurality of three-phase electromagnetic coils and a magnetic inductor comprising an external ring, an internal ring, and an activation coil, said internal and external rings positioned around said magnetic core to form said external stator surface along with a non-magnetic spacer located next to said coils.4. The underwater generator as in claim 1, wherein said system of alternating permanent magnets of said rotor further comprising a T-shaped non-magnetic ring supporting an outside magnetic ring of one magnetic polarity and an inside magnetic ring of the opposite magnetic polarity, said rings having teeth positioned in a spaced apart alternating order with each other to form a series of permanent magnets with alternating polarity, said series of permanent magnets positioned against said internal face surface of said rotor.5. The underwater generator as in claim 4, wherein a space between said teeth is filled with a non-magnetic material and contains a series of openings in fluid communication with said series of radial channels.6. The underwater generator as in claim 1, wherein said auxiliary pumping means is a constant flow pump.7. The underwater generator as in claim 6, wherein said pump is driven by said rotor.8. The underwater generator as in claim 7, wherein said predetermined amount of flow generated by said auxiliary pumping means is chosen so that the axial hydrostatic pressure from said flow on said internal face surface of said rotor is equal to other axial forces, whereby said axial gap is maintained within predetermined acceptable limits.9. The underwater generator as in claim 8, wherein said axial gap is maintained between about 0.15 and about 0.20 mm.10. The underwater generator as in claim 1, wherein said internal face surface of said rotor and said external face surface of said stator located on a periphery of said generator.