Systems and methods for electronic measurement of propeller blade angle
First Claim
1. A blade feedback system for an engine defining an axial direction, a radial direction, and a circumferential direction, the blade feedback system comprising:
- a propeller assembly rotatable about the axial direction and operatively coupled with the engine, the propeller assembly comprising a plurality of blades spaced apart in the circumferential direction and disposed about the axial direction, wherein the blades are configured to be rotated through a plurality of blade angles about their respective pitch axes each extending in the radial direction;
a housing comprising a sensor, the housing attached to or integral with the engine and in adjacent arrangement with the propeller assembly along the axial direction; and
a beta tube operatively coupled with the plurality of blades and extending at least partially into the housing and at least partially into the propeller assembly, the beta tube rotatable about the axial direction as the propeller assembly rotates and translatable along the axial direction when the plurality of blades are rotated about their respective pitch axes, and wherein the beta tube defines one or more grooves extending along the axial direction and positioned proximate the sensor of the housing such that the sensor can detect the one or more grooves, andwherein the propeller assembly is operatively coupled with the engine by a propeller shaft, and wherein the beta tube extends further aft than the propeller shaft along the axial direction.
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Accused Products
Abstract
Blade feedback systems and methods for determining a blade angle position and rotational speed of a plurality of propeller blades of a variable pitch propeller assembly are provided. Exemplary blade feedback system includes features for determining an axial position of a beta tube. Based at least in part on the axial position of the beta tube, the blade angle of the plurality of propeller blades can be determined. Exemplary blade feedback system can also include features for determining the rotational speed of the beta tube such that the rotational speed of the propeller blades can be determined.
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Citations
20 Claims
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1. A blade feedback system for an engine defining an axial direction, a radial direction, and a circumferential direction, the blade feedback system comprising:
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a propeller assembly rotatable about the axial direction and operatively coupled with the engine, the propeller assembly comprising a plurality of blades spaced apart in the circumferential direction and disposed about the axial direction, wherein the blades are configured to be rotated through a plurality of blade angles about their respective pitch axes each extending in the radial direction; a housing comprising a sensor, the housing attached to or integral with the engine and in adjacent arrangement with the propeller assembly along the axial direction; and a beta tube operatively coupled with the plurality of blades and extending at least partially into the housing and at least partially into the propeller assembly, the beta tube rotatable about the axial direction as the propeller assembly rotates and translatable along the axial direction when the plurality of blades are rotated about their respective pitch axes, and wherein the beta tube defines one or more grooves extending along the axial direction and positioned proximate the sensor of the housing such that the sensor can detect the one or more grooves, and wherein the propeller assembly is operatively coupled with the engine by a propeller shaft, and wherein the beta tube extends further aft than the propeller shaft along the axial direction. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method for determining a blade angle of propeller blades of a propeller assembly about their respective pitch axes, the propeller assembly operatively coupled with an engine defining an axial direction, a radial direction, and a circumferential direction, the method comprising:
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rotating a beta tube about the axial direction, the beta tube defining a first groove and a second groove, wherein the first groove extends in a variable phase along the circumferential direction as the first groove extends along the axial direction and the second groove extends in a constant phase along the circumferential direction as the second groove extends along the axial direction, the first groove spaced apart from the second groove along the circumferential direction, and wherein the propeller assembly is operatively coupled with the engine by a propeller shaft and the beta tube extends further aft than the propeller shaft along the axial direction; sensing, by a sensor positioned proximate the first and second grooves such that the sensor can detect the first and second grooves as the beta tube is rotated about the axial direction, a spatial relationship between the first groove and the second groove; and determining an axial position of the beta tube based at least in part on the spatial relationship between the first groove and the second groove. - View Dependent Claims (13, 14, 15)
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16. A gas turbine engine defining an axial direction, a radial direction, and a circumferential direction, the gas turbine engine comprising:
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a core turbine engine; a propeller assembly rotatable about the axial direction and operatively coupled with the core turbine engine by a propeller shaft, the propeller assembly having a plurality of blades rotatable through a plurality of blade angles about their respective pitch axes; a housing attached to or integral with the core turbine engine and in adjacent arrangement with the propeller assembly along the axial direction; a sensor disposed within the housing; and a beta tube operatively coupled with the plurality of blades, the beta tube extending at least partially into the propeller assembly and at least partially into the housing aft of the propeller shaft, the beta tube rotatable about the axial direction as the propeller assembly rotates about the axial direction and translatable along the axial direction when the plurality of blades are rotated about their respective pitch axes, and wherein the beta tube defines one or more grooves extending along the axial direction and positioned proximate the sensor of the housing such that the sensor can detect the one or more grooves. - View Dependent Claims (17, 18, 19, 20)
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Specification