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US 8,147,187 B2Granted
Control of variable-pitch blades
AssigneeSnecma
InventorChristelle Foucher
Life of this patent
Estimating the term…
Abstract
A device for controlling a pivot of a variable-pitch blade in a stator of a turbomachine compressor is disclosed. The device for controlling a pivot of a variable-pitch blade includes a control lever and a pivot with a bottom end and a top end. The top end is connected to the control lever. The device also includes a first swivel bearing placed at the bottom end of the pivot and a second swivel bearing placed at the top end of the pivot.
Claims15
A device for controlling a pivot of a variable-pitch blade comprising:
- a control lever;
- a blade pivot with a bottom end and a top end, said top end being connected to the control lever;
- and
- first and second swivel bearings, the first swivel bearing being placed at the bottom end of the pivot and the second swivel bearing being placed at the top end of the pivot,
- wherein each of the first and second swivel bearings includes an inner race with a spherical outer surface and an outer race with a spherical inner surface, the spherical outer surface of the inner race cooperating with the spherical inner surface of the outer race to form a swivel connection, wherein the inner race of the swivel bearings and the pivot are prevented from rotating relative to one another.
2 more elements
A compressor comprising:
- a stator including:
- a casing with an axis of revolution comprising at least one bore made along a radial axis oriented perpendicularly to said axis of revolution;
- at least one control device including a control lever;
- a blade pivot with a bottom end and a top end, said top end being connected to the control lever;
- and first and second swivel bearings, the first swivel bearing being placed at the bottom end of the pivot and the second swivel bearing being placed at the top end of the pivot;
- and
- at least one blade oriented along the radial axis placed inside the casing, said blade being fixedly attached to the pivot via the bottom end of said pivot,
- wherein each of the first and second swivel bearings includes an inner race with a spherical outer surface and an outer race with a spherical inner surface, the spherical outer surface of the inner race cooperating with the spherical inner surface of the outer race to form a swivel connection, and
- wherein the swivel bearings being placed inside the bore, pivot are prevented from rotating relative to one another.
6 more elements
A turbomachine comprising:
- a compressor including a stator, the stator including:
- a casing with an axis of revolution comprising at least one bore made along a radial axis oriented perpendicularly to said axis of revolution;
- at least one control device including a control lever;
- a blade pivot with a bottom end and a top end, said top end being connected to the control lever;
- and first and second swivel bearings, the first swivel bearing being placed at the bottom end of the pivot and the second swivel bearing being placed at the top end of the pivot;
- and
- at least one blade oriented along the radial axis placed inside the casing, said blade being fixedly attached to the pivot via the bottom end of said pivot,
- wherein each of the first and second swivel bearings includes an inner race with a spherical outer surface and an outer race with a spherical inner surface, the spherical outer surface of the inner race cooperating with the spherical inner surface of the outer race to form a swivel connection, and wherein the swivel bearings being placed inside the bore, wherein the inner race of the swivel bearings and the pivot are prevented from rotating relative to one another.
5 more elements
Dependencies are inferred from the claim text.