Granted Patent B2

US 8,328,522 · App. 11/906,060 · Granted Dec 11, 2012

Assignee: Pax Scientific, Inc.

Abstract

Claims (49)

1. A method for axial fan design, the method comprising:

executing instructions embodied in a computer-readable storage medium to draft a spline to connect a plurality of points along a radius cut sketch to form a blade surface displayed on a display device, the instructions executed by a processor communicatively coupled to the display device;

offsetting the blade surface by a constant amount;

filling the blade surface to form a single blade, the single blade displayed on the display device, wherein a portion of the blade surface conforms to a logarithmic spiral, the radius of the logarithmic spiral unfolding at a constant order of growth when measured at equiangular radii;

orienting the single blade with respect to a hub on the display device;

patterning the single blade with a total number of blades to be affixed to the hub around the hub; and

executing instructions embodied in a computer-readable storage medium to attach the single blade and the remaining blades from the total number of blades to the hub, the instructions executed by a processor, the hub and attached blades displayed on the display device.

2. The method of claim 1 , wherein the plurality of points are connected in increasing radius order.

3. The method of claim 1 , further comprising executing instructions embodied in a computer-readable storage medium to extend the blade surface at an edge to achieve a desired dimension.

4. The method of claim 1 , further comprising executing instructions embodied in a computer-readable storage medium to trim the blade surface at an edge to achieve a desired dimension.

5. The method of claim 1 , wherein orienting the single blade includes executing instructions embodied in a computer-readable storage medium to rotate the blade surface about an axis to change a pitch angle, the instructions executed by a processor.

6. The method of claim 1 , wherein orienting the single blade includes executing instructions embodied in a computer-readable storage medium to rotate the blade surface about an axis to change a dihedral angle, the instructions executed by a processor.

7. The method of claim 1 , wherein orienting the single blade includes executing instructions embodied in a computer-readable storage medium to rotate the blade surface about an axis to change a sweep angle, the instructions executed by a processor.

8. The method of claim 1 , wherein the attachment is temporary.

9. The method of claim 1 , wherein the attachment is permanent.

10. The method of claim 1 , wherein a portion of the blade surface conforms to an internal or external shell configuration from the phylum Mollusca and classes Gastropoda or Cephalopoda.

11. A fan apparatus, comprising:

a hub; and

a blade coupled to the hub, the blade including a blade surface, wherein the blade surface is designed by drafting a spline to connect a plurality of points along a radius cut sketch and the blade is designed by offsetting the blade surface by a constant amount and filling the blade surface to form a single blade, wherein a portion of the blade surface conforms to a logarithmic spiral, the radius of the logarithmic spiral unfolding at a constant order of growth when measured at equiangular radii.

12. The fan apparatus of claim 11 , wherein the plurality of points are connected in increasing radius order.

13. The fan apparatus of claim 11 , wherein the blade surface has been extended at an edge to achieve a desired dimension.

14. The fan apparatus of claim 11 , wherein the blade surface has been rotated about an axis with respect to the orientation of the blade surface to the hub.

15. The fan apparatus of claim 14 , wherein the rotation about the axis changes a pitch angle, dihedral angle, or sweep angle.

16. A method for axial fan design, the method comprising:

executing instructions embodied in a computer-readable storage medium to draft a spline to connect a plurality of points along a radius cut sketch to form a blade surface displayed on a display device, wherein a portion of the blade surface conforms to a logarithmic spiral, the radius of the logarithmic spiral unfolding at a constant order of growth when measured at equiangular radii, the instructions executed by a processor communicatively coupled to the display device;

creating a complimentary airfoil shape;

lofting the airfoil shape into a solid;

orienting the solidified blade with respect to a hub, the solidified blade oriented through the execution of computer-readable instructions executed by a processor, the oriented blade displayed on a display device;

patterning the solidified blade with a total number of blades to be affixed to the hub around the hub; and

executing instructions embodied in a computer-readable storage medium to attach the solidified blade and the remaining blades from the total number of blades to the hub, the instructions executed by a processor, the hub and attached blades displayed on the display device.

17. The method of 16 , further comprising executing computer readable instructions to alter a leading edge or trailing edge bluntness of the blade surface.

18. The method of claim 16 , wherein the airfoil shape is created on a first side of the blade surface.

19. The method of claim 16 , wherein the airfoil shape is created on the second side of the blade surface.

20. The method of claim 16 , wherein the airfoil blade is partially based on the surface.

21. The method of claim 16 , wherein the airfoil blade is fully based on the surface.

22. A non-transitory computer-readable storage medium having embodied thereon a program, the program being executable by a processor to perform a method for axial fan design, the method comprising:

drafting a spline to connect a plurality of points along a radius cut sketch to form a blade surface, wherein a portion of the blade surface conforms to a logarithmic spiral, the radius of the logarithmic spiral unfolding at a constant order of growth when measured at equiangular radii;

offsetting the blade surface by a constant amount;

filling the blade surface to form a single blade;

orienting the single blade with respect to a hub;

patterning the single blade with a total number of blades to be affixed to the hub around the hub; and

displaying the single blade and the remaining blades from the total number of blades as being attached to the hub.

23. A non-transitory computer-readable storage medium having embodied thereon a program, the program being executable by a processor to perform a method for axial fan design, the method comprising:

drafting a spline to connect a plurality of points along a radius cut sketch to form a blade surface, wherein a portion of the blade surface conforms to a logarithmic spiral, the radius of the logarithmic spiral unfolding at a constant order of growth when measured at equiangular radii;

creating a complimentary airfoil shape;

lofting the airfoil shape into a solid blade;

orienting the solidified blade with respect to a hub;

patterning the solidified blade with a total number of blades to be affixed to the hub around the hub; and

displaying the solidified blade and the remaining blades from the total number of blades as being attached to the hub.

Assignments (8)

Continuity (3)