Rotatable blade apparatus with individually adjustable blades
AssigneeEnergyield LLC
InventorRobert Hotto
Life of this patent
Estimating the term…
Abstract
The lengths and/or chords and/or pitches of wind turbine or propeller blades are individually established, so that a first blade can have a length/chord/pitch that is different at a given time to the length/chord/pitch of a second blade to optimize performance and/or to equalize stresses on the system.
Claims36
A wind turbine blade assembly comprising:
- at least first and second blades coupled to a rotatable rotor defining an axis of rotation, the first blade having a first blade tip being a first distance from the axis of rotation at a first time, the second blade having a second blade tip being a second distance from the axis of rotation at the first time, the first and second distances not being equal, wherein the distances are based on respective angular positions of the blades relative to the rotor independently of forces on the blades, the first distance being longer than the second distance, the first blade tip being at top dead center relative to the rotor at the first time, wherein the first blade has at least one of:
- its pitch, or its chord, being different from that of the second blade at the first time.
A wind turbine blade assembly comprising:
- at least first and second blades coupled to a rotatable rotor defining an axis of rotation, the first blade having a first blade tip being a first distance from the axis of rotation at a first time, the second blade having a second blade tip being a second distance from the axis of rotation at the first time, the first and second distances not being equal, wherein the distances are based on respective angular positions of the blades relative to the rotor independently of forces on the blades, the first distance being longer than the second distance, wherein at least one blade has respective plural parts telescoping relative to each other along the length of the blade, each blade defining a respective length, the lengths being different from each other at least at the first time, at least one actuator telescoping at least one part of a blade relative to another part of the blade, wherein at least one blade has at least three parts and at least two actuators telescoping respective parts.
A wind turbine blade assembly comprising:
- at least first and second blades coupled to a rotor defining an axis of rotation, the first blade defining a first pitch at a first time, the second blade defining a second pitch at the first time, the first and second pitches not being equal, wherein the pitches are based on respective angular positions of the blades with respect to the rotor, a motor being coupled to at least one blade to establish the pitch of the blade.
A wind turbine blade assembly comprising:
- at least first and second blades coupled to a rotor defining an axis of rotation, the first blade defining a first pitch at a first time, the second blade defining a second pitch at the first time, the first and second pitches not being equal, wherein the pitches are based on respective angular positions of the blades with respect to the rotor, wherein the first blade has at least one of:
- its chord, or its length, being different from that of the second blade at the first time.
A wind turbine blade assembly comprising:
- at least first and second blades coupled to a rotor defining an axis of rotation, the first blade defining a first pitch at a first time, the second blade defining a second pitch at the first time, the first and second pitches not being equal, wherein the pitches are based on respective angular positions of the blades with respect to the rotor, wherein the pitches are established based on respective pressure signals representative of fluid pressure on the blades.
A propeller blade assembly comprising:
- at least first and second blades coupled to a rotor defining an axis of rotation, the first blade having a first blade tip being a first distance from the axis of rotation at a first time, the second blade having a second blade tip being a second distance from the axis of rotation at the first time, the first and second distances not being equal, the first distance being longer than the second distance, the first blade tip being at top dead center relative to the rotor at the first time, wherein at least one blade has respective plural parts telescoping relative to each other along the length of the blade, each blade defining a respective length, the lengths being different from each other at least at the first time, comprising at least one actuator telescoping at least one part of a blade relative to another part of the blade, comprising a motor moving at least a portion of an actuator.
A propeller blade assembly comprising:
- at least first and second blades coupled to a rotor defining an axis of rotation, the first blade defining a first chord at a first time, the second blade defining a second chord at the first time, the first and second chords not being equal, a waterborne vessel shaft holding the blades in a vertical plane.
A propeller blade assembly comprising:
- at least first and second blades coupled to a rotor defining an axis of rotation, the first blade defining a first chord at a first time, the second blade defining a second chord at the first time, the first and second chords not being equal, wherein the chords are established based on respective pressure signals representative of fluid pressure on the blades.
A propeller blade assembly comprising:
- at least first and second blades coupled to a rotor defining an axis of rotation, the first blade defining a first pitch at a first time, the second blade defining a second pitch at the first time, the first and second pitches not being equal, no other blade defining the first pitch at the first time other than the first blade, a waterborne vessel shaft holding the blades in a vertical plane.
A propeller blade assembly comprising:
- at least first and second blades coupled to a rotor defining an axis of rotation, the first blade defining a first pitch at a first time, the second blade defining a second pitch at the first time, the first and second pitches not being equal, no other blade defining the first pitch at the first time other than the first blade, wherein the first blade has at least one of:
- its chord, or its length, being different from that of the second blade at the first time.
A propeller blade assembly comprising:
- at least first and second blades coupled to a rotor defining an axis of rotation, the first blade defining a first pitch at a first time, the second blade defining a second pitch at the first time, the first and second pitches not being equal, no other blade defining the first pitch at the first time other than the first blade, wherein the pitches are established based on respective pressure signals representative of fluid pressure on the blades.
Dependencies are inferred from the claim text.