Air turbine starter with shaped vanes
AssigneeUnison Industries, LLC
InventorsMilind Chandrakant Dhabade, Vishnu Vardhan Venkata Tatiparthi, Ramana Reddy Kollam, Shiloh Montegomery Meyers, Saurya Ranjan Ray, Subrata Nayak
Life of this patent
Estimating the term…
Abstract
An air turbine starter comprising a housing defining an inlet, an outlet, and a flow path, a turbine having a rotor with circumferentially spaced blades extending into the flow path, a drive shaft operably coupled to and rotating with the rotor, and at least one vane located within the flow path, upstream of the blades. The at least one blade being defined by an acute axial angle and an acute tangential angle.
Claims20
An air turbine starter, comprising:
- a housing defining an inlet, an outlet, and a flow path extending between the inlet and the outlet;
- a turbine having a rotor with circumferentially spaced blades located within the housing, at least a portion of the circumferentially spaced blades extend into the flow path and rotate in a rotational direction in response to a fluid flowing along the flow path from the inlet to the outlet;
- a drive shaft operably coupled to and rotating with the rotor to define a rotational axis;
- and
- set of vanes located within the flow path, upstream of the circumferentially spaced blades, the set of vanes being circumferentially spaced about the rotational axis, with each vane of the set of vanes having an outer wall defining a pressure side and a suction side extending between a leading edge and a trailing edge to define a chord-wise direction, and between a root and a tip to define a span-wise direction;
- wherein each vane of the set of vanes is shaped such that a line, extending between the root and the tip at the same percent of the vane in the chord-wise direction, forms an acute axial angle relative to a ray extending perpendicularly from the rotational axis and intersecting the line when viewed in a plane including the line and the rotational axis, and
- an acute tangential angle is formed between the line and the ray extending perpendicularly from the rotational axis when viewed in a plane that is normal to the rotational axis;
- and
- wherein the set of vanes includes a first vane and a second vane, with the acute tangential angle of the first vane being non-zero and the acute tangential angle of the second vane being zero.
At least two vanes including a first vane and a second vane located within a flow path of an air turbine starter that includes a drive shaft defining a rotational axis, each vane of the at least two vanes comprising:
- an outer wall defining a pressure side and a suction side extending between a leading edge and a trailing edge to define a chord-wise direction, and between a root and a tip to define a span-wise direction;
- wherein the first vane and the second vane shaped such that a line, intersecting the root and the tip at the same percent of each vane in the chord-wise direction, forms an acute axial angle relative to a ray extending perpendicularly from the rotational axis and intersecting the line when viewed in a plane including the line and the rotational axis, and
- an acute tangential angle is formed between the line and the ray extending perpendicularly from the rotational axis when viewed in a plane that is normal to the rotational axis;
- and
- wherein the acute tangential angle of the first vane is non-zero and the acute tangential angle of the second vane is zero.
Dependencies are inferred from the claim text.