Abstract:
The invention takes energy from the periphery of a hydro electric turbine blade to produce electricity by mechanically driving a plurality of generators without the use of a hydraulic system.

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS  
         [0001]    Not applicable  
         STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT  
         [0002]    Not applicable  
         REFERENCE TO A MICROFICHE APPENDIX  
         [0003]    Not applicable  
         BACKGROUND OF THE INVENTION  
         [0004]    The invention is a machine for producing electricity from a water current. A provisional application No. 60/233,753 filing date Sep. 19, 2000 has been filed. Hydroelectric turbine runners (blades) are very efficient at extracting the energy from a fast moving water current (high head) but not very efficient with slower currents (low head). The reason for this problem is that existing runners (blades) rotate around a central shaft which restricts their ability to have very large diameters due to weight and structural limitations. Low head currents contain less energy per a given cube of water and therefore require a larger blade surface area. This invention deals with this situation in three basic ways.  
           [0005]    1. By eliminating the central area of the blade where the most weight and drag occur.  
           [0006]    2. By taking the energy from the blade perimeter (outer blade tips).  
           [0007]    3. By designing the blades of very large diameters to also have larger open areas in their centers.  
           [0008]    By incorporating the above 3 ideas, the invention can be built ever larger which gives the large blade area needed for low head applications while holding weight and drag to a minimum. In essence, the hole in the center continues to get larger which increases the blade area accordingly but the structural limitations, weight and drag are held to a minimum.  
         BRIEF SUMMARY OF THE INVENTION  
         [0009]    The invention is a machine designed to be capable of having a very large blade area while eliminating some inherent problems of existing blade technologies. This is accomplished by taking the energy of the blade from the periphery and not a central shaft. This is seen in U.S. Pat. No. 5,592,816 HYDROELECTRIC POWERPLANT. While that patent incorporates a hydraulic system to take the energy from the blade to the generator, this machine takes the energy from the blade to a generator (or generators) by the use of a mechanical means thereby eliminating the hydraulic system altogether which allows for the blades to be built very large in size. 
       
    
    
     BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWING  
       [0010]    [0010] 1  is a hydro electric turbine blade that has no central shaft or hub. The inward limit of the blade is the inner rim  6  and the outward limit of the blade is the outer rim  5 .  
         [0011]    [0011] 2  is the frame which is a cylinder with slotted access holes cut into itself to allow the device  3  to pass through the holes and press against the outer rim  5  of the blade  1 .  
         [0012]    [0012] 3  is the device similar to a solid rubber cylinder which mechanically mounts to the shaft of the generator  4  and presses against the outer rim  5  of the blade  1  with enough pressure to create the friction necessary to transfer the blade  1  rotational energy to the generator  4  shaft.  
         [0013]    [0013] 4  is a generator.  
         [0014]    [0014] 5  is the outer rim of the blade  1 .  
         [0015]    [0015] 6  is the inner rim of the blade  1 . 
     
    
     DETAILED DESCRIPTION OF THE INVENTION  
       [0016]    This invention is an improvement on what is old (a method of taking the energy from the periphery of a turbine blade by the use of a hydraulic system). See U.S. Pat. No. 5,592,816.  
         [0017]    This machine is new in that it takes the energy from the periphery of a turbine blade by the use of a mechanical means thereby eliminating the need for a hydraulic system. This allows for the blade to be built to a very large diameter by reducing the weight and drag of the central area.  
         [0018]    The water current flows through the frame  2  of the embodiment which causes the blade  1  to rotate which causes the device  3  to rotate which causes the generator  4  to rotate which produces electricity.  
         [0019]    The blade  1  is not mechanically attached to the frame  2  but is held on location by the device  3  which is mechanically attached to the generator  4  which is mechanically attached to the frame  2 .  
         [0020]    The device  3  is pressed against the rim  5  of the blade  1 , which causes the rotation of the device  3 , which causes rotation of the generator  4 .  
         [0021]    The axis of the device  3  can be parallel or perpendicular to the direction of water flow. In (FIG. 1) and (FIG. 2) it is shown to be parallel and pressing against the outer rim of the blade. In a perpendicular configuration (which is not shown in the drawings) it would be behind the blade which would keep the blade from being pushed downstream by the water force.  
         [0022]    The center of the blade  1  is an open area with an inner rim  6  as is shown in (FIG. 1). As the water which flows unrestricted through the center of the blade  1  combines downstream with the water which flows through the blade  1 , a friction is induced between the two water flows which aids in increasing the velocity of the water flowing through the blade  1 . This increased velocity of the water downstream of blade  1  aids in pulling the water through the blade at an increased speed which contributes to a higher blade efficiency than would have been possible with a central hub and shaft type blade.  
         [0023]    The open area through the center of the blade  1  eliminates the turbulence that occurs behind the hub and shaft of existing turbine blades.