Fluid turbine

• US 4,295,783 A
• Filed: 02/09/1978
• Issued: 10/20/1981
• Est. Priority Date: 02/09/1978
• Status: Expired due to Term

• Current Assignee: Barry A. Lebost
• Original Assignee: Barry A. Lebost
• Inventors: Lebost, Barry A.
• Primary Examiner(s): Powell, Jr., Everette A.
• Application Number:
  US05/876,217
• Time in Patent Office: 1,349 Days
• Field of Search: 415/2, 415/3, 415/4, 290/54, 290/55
• US Class Current: 415/4.4
• CPC Class Codes: F03B 13/145 for immediate use in an energy converter
• 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: 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 10/74 Wind turbines with rotation axis perpendicular to the wind direction

Abstract

A fluid turbine designed for increased power output including an annular housing provided with a semispherical dome for directing incoming fluid flow from a fluid source in an angular and downward direction to impinge simultaneously on a plurality of radial, horizontal, rotor blades within the housing fixed to a vertical output shaft. The simultaneous impingement of the incoming fluid on all of the rotor blades quickly overcomes the initial inertia of the blades to rotation and maintains the rotor operating at peak velocity. The housing rotates independent of and coaxial to the rotor blades so as to position its fluid entrance passage normal to the direction of fluid flow and is provided with a plurality of fluid exit passages in its base so that deenergized fluid can be flushed from the housing by the downwardly directed flow which in conjunction with a low pressure area created behind a downwardly directed frontal scoop connected to the housing, which blocks the path of flow of the ambient fluid, causes additional fluid to be continuously drawn into the housing at high velocity to impinge on the rotor blades. The housing is gyroscopically stable and prevents the rotor from cutting back into the ambient fluid, which would retard rotation, while serving as a safety shield against flying debris entrained in the fluid stream.

Claims

1. A fluid turbine for generating power when disposed in a free flowing fluid, comprising

a rotor means including

a housing, and

a plurality of rotor blades within said housing adapted to rotate in a reference plane about a longitudinal axis when exposed to said free flowing fluid,

said housing being provided with a first fluid entrance passage therein for allowing fluid to enter said turbine in a direction lying within said reference plane to engage at least certain ones of said rotor blades, said housing being further provided with a second fluid entrance passage therein contiguous with said first fluid entrance passage for allowing fluid to enter said turbine in another direction oblique to said reference plane,

means operatively connected to said rotor blades for generating power in response to rotation of said rotor blades, and

means on said housing adjacent said first and second fluid entrance passages for directing fluid from said passages in a direction lying essentially within said reference plane to impinge upon said rotor blades, and in a direction oblique to said reference plane toward said blades to impinge upon all of said rotor blades, said means on said housing including

side wall means spaced from said reference plane and inclined with respect to said longitudinal axis, said side wall means extending at least approximately two quandrants around the rotational path of said rotor blades to provide a space adjacent said rotor blades for producing spiral flow of fluid within said housing and between said wall means adjacent said rotor blades.

2. A fluid turbine in accordance with claim 1 wherein said second fluid entrance passage is disposed wholly within one quadrant of said side wall means.

3. A fluid turbine in accordance with claim 1 including at least one fluid exit passage in the bottom of said housing, said fluid exit passage extending coextensive with the area swept by said rotor blades.

4. A fluid turbine in accordance with claim 1 including

scoop means connected to said housing adjacent said first fluid entrance passage for concentrating fluid entering said rotor housing.

5. A fluid turbine in accordance with claim 1, wherein said housing is substantially annular in shape.

6. A fluid turbine in accordance with claim 1, including means adjacent said first fluid entrance passage for increasing the velocity of fluid flow to said housing.

7. A fluid turbine in accordance with claim 1 wherein said means operatively connected to said rotor blades for generating power in response to rotation of said rotor blades includes a vertical shaft.

8. A fluid turbine in accordance with claim 7 wherein said vertical shaft is connected to a pump type fluid brake disposed in a case filled with a fluid heat exchange medium.

9. A fluid turbine in accordance with claim 1 wherein said side wall means forms a substantially hemispherical dome.

10. A fluid turbine in accordance with claim 3 including means for creating a low pressure area in said housing adjacent said fluid exit passage to force fluid into said housing.

11. A fluid turbine in accordance with claim 10 wherein said low pressure area creating means includes:

a downwardly sloping fluid scoop connected to said housing adjacent said first fluid entrance passage, said scoop including a portion extending below the plane of the bottom of said housing to block fluid flowing past said fluid exit passage.

12. A fluid turbine for generating power when immersed in a freely flowing fluid comprising:

rotor means including

a housing, and

a plurality of rotor blades within said housing adapted to rotate within a reference plane when exposed to said flowing fluid,

said housing being provided with a first fluid entrance passage therein for allowing fluid to enter said turbine in a direction generally lying within said reference plane, and a second fluid entrance passage therein adjacent said first fluid entrance passage and spaced from said reference plane for allowing fluid to enter said turbine in another direction oblique to said reference plane,

means on said housing adjacent said first fluid entrance passage for directing fluid from said first fluid entrance passage to impinge on at least certain ones of said rotor blades in a direction essentially lying within said reference plane,

said housing including a cavity adjacent said rotor blades defined by side wall means spaced from said reference plane and inclined with respect to an axis normal to said reference plane, said side wall means extending at least approximately two quadrants around the path of rotation of said rotor blades whereby to produce spiral motion of said fluid flowing in said oblique direction.

13. A fluid turbine for generating power comprising:

a single rotor provided with a housing,

a set of radially extending rotor blades within said housing adapted to rotate in a single reference plane when exposed to a source of fluid,

a first fluid entrance passage in said housing extending in a direction lying essentially within said reference plane, and

a second fluid entrance passage spaced from said first fluid entrance passage and extending in a direction oblique to said reference plane,

means connected to said rotor housing for independently rotating said housing coaxial to said rotor blades in response to omni-directional fluid flow to position said fluid entrance passage in said rotor housing normal to the direction of fluid flow, and

means operatively connected to said rotor blades for generating power in response to the rotation of said rotor blades,

said housing including side wall means spaced from said reference plane and inclined with respect to an axis normal to said reference plane, said side wall means extending at least 180 degrees around the path of rotation of said rotor blades whereby to produce spiral motion of fluid entering said housing through said second fluid entrance passage.

14. A fluid turbine for generating power comprising:

a single rotor,

said rotor including

a housing having means defining a fluid entrance passage,

a set of radially extending rotor blades within said housing adapted to rotate in a reference plane about a longitudinal axis when exposed to a source of fluid, and

a fluid exit passage adjacent said rotor blades and coextensive with the latter,

said means defining said entrance passage extending angularly away from said reference plane and generally toward said longitudinal axis, whereby to expose said rotor blades to a portion of said fluid flowing into said housing in a direction substantially aligned with said reference plane, and to expose all of said rotor blades to another portion of said fluid flowing into said housing in a direction toward said reference plane and oblique to the latter,

means connected to said rotor housing for independently rotating said housing coaxial to said rotor blades in response to omni-directional fluid flow to position said fluid entrance passage in said rotor housing normal to the direction of fluid flow, and

means operatively connected to said rotor blades for generating power in response to the rotation of said rotor blades

said housing including side wall means spaced from said reference plane and inclined with respect to said longitudinal axis, said side wall means extending around at least approximately two quadrants of the rotational path of said rotor blades whereby to produce spiral motion of said another portion of fluid flowing into said housing.

15. A fluid turbine in accordance with claim 14 including:

means on said housing adjacent said fluid exit passage for creating a zone of low fluid pressure adjacent said fluid exit passage.

16. A fluid turbine in accordance with claim 15 wherein said low pressure creating means comprises:

a downwardly sloping fluid scoop connected to said housing adjacent said means defining said entrance passage, said scoop including a portion extending below the plane of the bottom of said housing to block flow from said fluid source.

17. In combination:

a fluid turbine having a plurality of rotor blades adapted to rotate in a reference plane for generating power when exposed to a source of flowing fluid,

said turbine including a housing provided with a first fluid entrance passage therein for allowing fluid to enter said turbine in one direction lying in said reference plane and engage at least certain ones of said rotor blades, said housing being further provided with a second fluid entrance passage for allowing fluid to enter said turbine in another direction oblique to said reference plane whereby to initially engage all of said rotor blades,

said housing including side wall means spaced from said rotor blades and inclined with respect to an axis normal to said reference plane, said side wall means extending around at least approximately three quadrants of the rotational path of said rotor blades whereby to produce spiral motion of said fluid entering said second fluid entrance passage, and

a pump type load driven by said turbine rotor blades at peak turbine efficiency at all input fluid velocities from said source to said turbine, said turbine having a power coefficient above the ideal efficiency for unshrouded propeller type turbines based upon projected blade frontal areas.

18. The combination of claim 17 wherein said fluid turbine further comprises:

means connected to said housing independently rotating said housing coaxial to said rotor blades in response to omni-directional fluid flow to position said first and second fluid entrance passage in said housing normal to the direction of fluid flow, and

means operatively connected to said rotor blades for generating power in response to the rotation of said rotor blades.

19. The combination of claim 18 wherein said pump type load comprises:

an impeller type fluid brake connected to said power generation means of said turbine, said fluid brake being disposed in a case filled with a fluid heat exchange medium.

20. A fluid turbine for generating power when immersed in a freely flowing fluid, comprising:

rotor means including a housing having a first and second fluid entrance passage, a fluid exhaust and a plurality of rotor blades within said housing adapted to rotate in a reference plane about a longitudinal axis when exposed to said fluid flow, said first fluid entrance passage lying essentially within said reference plane, said second fluid entrance passage being spaced from said first fluid entrance passage in a direction parallel to said longitudinal axis;

means operatively connected to said rotor blades for generating power in response to rotation of said rotor blades;

means on said housing for creating a low pressure zone adjacent said fluid exhaust; and

means on said housing adjacent said first and second fluid entrance passage for directing fluid from said entrance passage toward said low pressure zone and is a direction lying essentially within a reference plane to impinge upon said rotor blades, and in a substantially helical direction oblique to said reference plane toward said blades to impinge upon all of said rotor blades,

said housing including side wall means spaced from said reference plane and inclined with respect to said longitudinal axis, said side wall means extending annularly at least approximately two quadrants of the rotational path of said rotor blades whereby to produce spiral motion of fluid in said housing directed toward said blades and oblique to said reference plane.

21. A fluid turbine in accordance with claim 20, wherein:

said side wall means extends at least three quadrants of the rotational path of said rotor blades.

22. A fluid turbine in accordance with claim 21 wherein said side wall means form a dome shaped configuration, and said second fluid entrance passageway is in one quadrant of said configuration.

23. A fluid turbine in accordance with claim 20 including means on said housing for independently rotating the latter coaxial to said rotor blades in response to omni-directional fluid flow to position said first and second fluid entrance passage in said housing normal to the direction of fluid flow.

24. A fluid turbine in accordance with claim 20 wherein said low pressure creating means includes structure interposed in fluid flow blocking relationship between the fluid flowing toward said turbine and said fluid exhaust.

25. A fluid turbine in accordance with claim 20, including a pump type load operably coupled with said rotor blades and driven by the latter.