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US 7,244,096 B2Granted
Curved blade oil scoop
AssigneeHoneywell International Inc.
InventorsJonathan E. Dins, John Hogan, Arun Kumar
Life of this patent
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Abstract
Disclosed herein is a rotating radial scoop used to move fluid from a larger radius to a smaller radius, comprising a blade at least partially circumscribing a central axis from an outer radius of the scoop to an capture radius of the scoop, wherein the inner surface of the blade is curved. A scoop having a blade with a curved inner surface extending from the scoop outer radius to a capture radius is disclosed. A turbine engine comprising the scoop, along with a method of providing a fluid to a bearing utilizing the scoop is also disclosed.
Claims34
A scoop, comprising:
- a blade at least partially circumscribing a central axis of said scoop from an outer radius of said scoop to a capture radius of said scoop;
- and
- a barrier located at a downstream end of said blade;
- wherein said blade is curved, and has a blade inner surface curvature from said outer radius to said barrier, the blade inner surface curvature varying from said outer radius to said barrier.
1 more element
A scoop comprising:
- a blade having an inner surface located between a central axis and an outer radius of said scoop, said blade inner surface at least partially circumscribing said central axis of said scoop from a scoop inlet to a scoop outlet and having has a blade curvature that is at least partially spiral with respect to said central axis, said scoop inlet located at said outer radius of said scoop and said scoop outlet located at a capture radius of said scoop or a larger radius, wherein said inside surface of said blade is curved.
A scoop comprising:
- a blade at least partially circumscribing a central axis from a scoop inlet located at an outer radius, to a scoop outlet located at a capture radius, wherein said blade has an inside blade surface between said central axis and said outer radius, said blade having a blade curvature from said outer radius to a barrier located between said scoop inlet and said scoop outlet, wherein said barrier depends radially inward from said blade towards said central axis to define a capture radius;
- a capture cavity located circumferentially between said barrier and said scoop outlet,
- said capture cavity being bounded by said capture radius and by the inner surface of a capture arc, wherein said capture arc is between said capture radius and said outer radius of said scoop, wherein said blade curvature comprises a plurality of points P on said blade circumferentially between said scoop inlet and said barrier, wherein said plurality of points P are defined by the equation:
- Point
-
-
- P
-
-
- radius
- Capture
-
-
- radius
- =
- ⅇ
- β
-
-
- tan
-
-
- α
- wherein:
- α is an angle between a line tangent to said outer radius and said blade inner surface at the outer radius,
- β is said angular distance of point P from said capture radius, and
- e is the exponential function.
24 more elements
A turbine engine comprising:
- a rotor shaft supported by at least two bearings with or without a seal;
- a fluid nozzle for ejecting a fluid towards a scoop circumscribing said rotor shaft;
- wherein said scoop comprises a blade at least partially circumscribing a central axis of said rotor shaft from a first radial position an outer radius of said scoop to a second radial position at a capture radius of said scoop, wherein said blade is curved, at least partially circumscribes said central axis from a scoop inlet located at an outer radius to a scoop outlet located at a capture radius, and has an inner surface having a curvature from said outer radius to a barrier located between said scoop inlet and said scoop outlet, said barrier depending radially inward from said inside blade surface towards said central axis to a capture radius, said blade inner surface curvature comprising a plurality of points P on said blade inner side between said scoop inlet and said barrier, said plurality of points P defined by the equation:
- Point
-
-
- P
-
-
- radius
- Capture
-
-
- radius
- =
- ⅇ
- β
-
-
- tan
-
-
- α
- wherein:
- α is an angle between a line tangent to said outer radius and said blade inner surface at the outer radius,
- β is said annular distance of point P from said capture radius, and
- e is the exponential function;
- wherein said fluid nozzle is positioned to direct said fluid towards said scoop at an angle between about 90° to about 10° relative to a line T tangent to said outer radius.
25 more elements
A method of providing a fluid to a bearing assembly comprising:
- spraying said fluid towards a scoop such that at least a portion of said fluid is captured by said scoop, said scoop circumscribing a rotor shaft that is supported by a bearing assembling circumscribing said rotor shaft;
- and
- distributing said fluid captured by said scoop to said bearing assembly through a conduit disposed in said rotor shaft or said scoop or other elements on the rotor shaft, said conduit extending axially from said scoop to said bearing assembly, said bearing assembly also in fluid communication with said scoop, wherein said scoop comprises a blade at least partially circumscribing a central axis from an outer radius to a capture radius and a barrier located at a downstream end of said blade, wherein said blade is curved and has a blade inner surface curvature from said outer radius to said barrier, the blade inner surface curvature varying from said outer radius to said barrier.
Dependencies are inferred from the claim text.