Blade retention arrangement
AssigneeRolls-Royce Deutschland Ltd & Co KG
InventorTim Moeller
Life of this patent
Estimating the term…
Abstract
A blade retention arrangement axially fixes blades (1) to a disk (2). A profiled blade root (3) extending from the airfoil is inserted into a conformal axial slot (5) in the disk (2) and is axially secured by means of a split retaining ring (4), with the retaining ring (4) at least partly engaging a groove (6) on the blade root (3). The disk (2) is provided with a circumferential annular groove (7) which has a radially inward seating face for the retaining ring (4) and the retaining ring (4) is elastically deformable at least in the axial direction.
Claims20
A blade retention arrangement for the axial fixation of blades to a disk, in which a profiled blade root extending from one of the blades is inserted into a conformal axial slot in the disk and is axially secured comprising:
- a groove on the blade root;
- a split retaining ring, the retaining ring at least partly engaging the groove on the blade root, the retaining ring being elastically deformable in at least an axial direction of the disk;
- and
- a circumferential annular groove provided on the disk which includes a radially inward seating face for accepting the retaining ring, wherein the annular groove includes at least one axially opening entry circumferentially positioned between adjacent blade roots for inserting the retaining ring into the annular groove when the retaining ring is elastically deformed in the axial direction.
A retaining ring for retaining a blade to a disk in a turbine, comprising:
- at least two layers which are connected to each other at one circumferential end of the retaining ring and free with respect to each other at another circumferential end of the retaining ring to increase a spring elasticity of the retaining ring, the retaining ring being constructed and arranged to be elastically deformable in at least an axial direction of the disk to be inserted into both a groove on the blade root and a circumferential annular groove provided on the disk, wherein, elastic deformation of the retaining ring in the axial direction causes at least one of the free ends of the two layers to move circumferentially with respect to the other of the free ends.
A blade retention arrangement for the axial fixation of blades to a disk, in which a profiled blade root extending from one of the blades is inserted into a conformal axial slot in the disk and is axially secured comprising:
- a groove on the blade root;
- a split retaining ring, the retaining ring at least partly engaging the groove on the blade root, the retaining ring being elastically deformable in at least an axial direction of the disk;
- a circumferential annular groove provided on the disk which includes a radially inward seating face for accepting the retaining ring;
- and
- an anti-rotation lock for the retaining ring, the anti-rotation lock comprising a radial tang positioned at an end of the retaining ring.
Dependencies are inferred from the claim text.