Slider
AssigneeROLLS-ROYCE plc
InventorChristopher BENSON
Life of this patent
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Abstract
A slider for chocking a dovetail root of a blade of a gas turbine engine in a corresponding axially-extending slot in the rim of a disc. The slider, in use, is slidingly inserted in an axially-extending cavity formed in the base of the root and in the disc at the base of the slot to urge the blade radially outwardly and thereby mate flanks of the root to flanks of the slot. The slider is arc-shaped and the cavity is correspondingly arc-shaped. The normal to the plane of the arc of the arc-shaped cavity is substantially perpendicular to the engine axis such that, when inserted in the cavity, the slider also retains the root axially in the slot.
Claims11
A slider for chocking a dovetail root of a blade of a gas turbine engine in a corresponding axially-extending slot in the rim of a disc, the slider, in use, being slidingly inserted in an axially-extending cavity formed in the base of the root and in the disc at the base of the slot to urge the blade radially outwardly and thereby mating flanks of the root to flanks of the slot;
- wherein the slider is arc-shaped and the cavity is correspondingly arc-shaped with the normal to the plane of the arc of the arc-shaped cavity being substantially perpendicular to the engine axis such that, when inserted in the cavity, the slider also retains the root axially in the slot.
A rotor assembly of a gas turbine engine, the assembly having:
- a disc;
- a circumferential row of blades, each blade having a dovetail root which is retained in a corresponding axially-extending slot in the rim of the disc;
- and
- a circumferential row of arc-shaped sliders according to any one of the previous claims;
- wherein each slider is slidingly inserted in an axially-extending and correspondingly arc-shaped cavity formed in a base of a respective root and in the disc at a base of the slot to urge that blade radially outwardly and thereby mate flanks of the root to flanks of the slot, the normal to the plane of the arc of the arc-shaped cavity being substantially perpendicular to the engine axis such that the slider also retains the root axially in the slot.
Dependencies are inferred from the claim text.