Wear ring for integrated drive generator
AssigneeHamilton Sundstrand Corporation
InventorsDerek R. Hochstetler, Ted A. Martin, Duane C. Johnson, Glenn C. Lemmers, JR.
Life of this patent
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Abstract
A wear ring for use in an integrated drive generator has a cylindrical body defining an axis and having a tab extending radially outwardly of an outer cylindrical surface of the cylindrical body. The tab has a radially outer point. A ratio of a first radius to the outer cylindrical surface from the axis to a second radius extending to the radially outer point from the axis is between 0.90 and 0.95. An integrated drive generator and a method are also disclosed.
Claims20
A wear ring for use in an integrated drive generator comprising:
- a cylindrical body defining an axis and having a tab extending radially outwardly of an outer cylindrical surface of said cylindrical body, said tab having a radially outer point, and a ratio of a first radius to said outer cylindrical surface from the axis to a second radius extending to the radially outer point from the axis is between 0.90 and 0.95.
An integrated drive generator comprising:
- an input shaft connected to a differential;
- said differential connected to a generator for generating electricity, and said differential also being connected with a hydraulic unit, said hydraulic unit including a variable swash plate, said variable swash plate being associated with a set of pistons, and a cylindrical block, said set of pistons being received in a piston retainer;
- a retaining ring intermediate said piston retainer and said cylinder block, and a wear ring positioned intermediate said piston retainer and said retaining ring;
- and
- said wear ring including a cylindrical body defining an axis having a tab extending outwardly of an outer cylindrical surface of said body, said tab having a radially outer point, and a ratio of a first radius to said outer cylindrical surface from the axis to a second radius extending to the radially outer point from the axis is between 0.90 and 0.95, said tab extending into a notch in said variable swash plate such that said wear ring does not rotate.
A method of replacing a wear ring in an integrated drive generator comprising the steps of:
- removing an existing wear ring from an integrated drive generator, the integrated drive generator including an input shaft configured to drive a differential, said differential configured to provide an input drive to a generator for generating electricity, and said differential also being connected with a hydraulic unit, said hydraulic unit including a variable swash plate, said variable swash plate being associated with a set of pistons, and a cylindrical block, said set of pistons being received in a piston retainer, a retaining ring intermediate said piston retainer and said cylinder block, and said existing wear ring positioned intermediate said piston retainer and said retaining ring, said tab on said wear ring extendable into a notch in said variable swash plate to prevent rotation of said wear ring relative to said variable swash plate;
- and
- inserting a replacement wear ring, said replacement wear ring including a cylindrical body defining an axis and having a tab extending radially outwardly of an outer cylindrical surface of said cylindrical body, said tab having a radially outer point, and a ratio of a first radius to said outer cylindrical surface from the axis to a second radius extending to the radially outer point from the axis is between 0.90 and 0.95.
Dependencies are inferred from the claim text.