SPIRAL SCREW FLUID TURBINE HAVING AXIAL VOID

• US 20130343891A1
• Filed: 06/07/2013
• Published: 12/26/2013
• Est. Priority Date: 06/07/2012
• Status: Abandoned Application

• Current Assignee: Uppala Rajakaruna
• Original Assignee: Uppala Rajakaruna
• Inventors: RAJAKARUNA, Uppala, GEEKIYANAGE, Bushitha Sehan
• Application Number:
  US13/913,014
• Publication Number:
  US 20130343891A1
• Time in Patent Office: Days
• US Class Current: 416/176
• CPC Class Codes: F01D 5/023 of the screw type
• CPC Class Codes: F03B 17/061 with rotation axis substantially in flow direction
• CPC Class Codes: F03D 1/0608 characterised by their aerodynamic shape
• CPC Class Codes: F05B 2210/16 Air or water being indistinctly used as working fluid, i.e. the machine can work equally with air or water without any modification
• CPC Class Codes: F05B 2240/40 Use of a multiplicity of similar components
• CPC Class Codes: F05B 2250/15 spiral
• CPC Class Codes: F05B 2250/232 conical
• CPC Class Codes: Y02E 10/20 Hydro energy
• CPC Class Codes: Y02E 10/30 Energy from the sea, e.g. using wave energy or salinity gradient
• CPC Class Codes: Y02E 10/72 Wind turbines with rotation axis in wind direction

Abstract

A spiral turbine includes an axle configured to rotate and one or more spiral blades coupled to the axle by one or more support connections. Each spiral blade is formed around and outside of a conical inner space which is coaxial with the axle.

Claims

1. A spiral turbine comprising:

an axle configured to rotate;

one or more spiral blades coupled to the axle by one or more support connections, each spiral blade being formed around and outside of a conical inner space which is coaxial with the axle.

2. The spiral turbine of claim 1, wherein the one or more spiral blades comprises at least two of the spiral blades, the blades being symmetrically disposed around the axle.

3. The spiral turbine of claim 1, wherein each spiral blade converges on and couples to the axle at a narrow end of the conical inner space.

4. The spiral turbine of claim 1, wherein each spiral blade is segmented.

5. The spiral turbine of claim 1, wherein the one or more spiral blades are weight balanced around the axle.

6. The spiral turbine of claim 1, wherein each spiral blade is wider at a wide end of the conical inner space than at a narrow end of the conical inner space.

7. The spiral turbine of claim 1, wherein each spiral blade has a leading edge spaced apart from a perimeter of the conical inner space.

8. The spiral turbine of claim 1, wherein each spiral blade has one of a flat profile or a curved profile.

9. The spiral turbine of claim 1, further comprising an electricity generator operatively coupled to the axle.

10. The spiral turbine of claim 9, wherein the axle is operatively coupled to the electricity generator through a rotatable universal joint.

11. An electricity generating system comprising:

at least one electricity generator having a rotational input;

an array of spiral turbines, each turbine comprising;

an axle operatively coupled to the rotational input;

one or more spiral blades coupled to the axle by one or more support connections, each spiral blade being formed around and outside of a conical inner space which is coaxial with the axle.

12. The spiral turbine of claim 11, wherein the one or more spiral blades of each turbine comprises at least two of the spiral blades, the blades being symmetrically disposed around the axle.

13. The spiral turbine of claim 11, wherein for at least one of the turbines, each spiral blade converges on and couples to the axle at a narrow end of the conical inner space.

14. The spiral turbine of claim 11, wherein for at least one of the turbines, each spiral blade is segmented.

15. The spiral turbine of claim 11, wherein tor at least one of the turbines, each spiral blade is wider at a wide end of the conical inner space than at a narrow end of the conical inner space.

16. The spiral turbine of claim 11, wherein for at least one of the turbines, each spiral blade has a leading edge spaced apart from a perimeter of the conical inner space.

17. The spiral turbine of claim 11, wherein for at least one of the turbines, each spiral blade has one of a flat profile or a curved profile.

18. The spiral turbine of claim 11, wherein each axle is operatively coupled to one of the electricity generators through a rotatable universal joint.

19. The system of claim 11, wherein at least two of the spiral turbines are operatively coupled to the rotational input in series.

20. The system of claim 11, wherein at least two of the spiral turbines are operatively coupled to the rotational input in parallel.