Rotor blade root spacer with grip element

Patent metadata

Field	Value
Publication number	US-10508556-B2
Application number	US-201314761841-A
Country	US
Kind code	B2
Filing date	Jan 17, 2013
Priority date	Jan 17, 2013
Publication date	Dec 17, 2019
Grant date	Dec 17, 2019

Abstract

An assembly includes a rotor disk, a rotor blade and a root spacer. The rotor disk includes a slot that extends longitudinally into the rotor disk. The rotor blade includes a blade root arranged within the slot. The root spacer is arranged with the slot between the rotor disk and the blade root. The root spacer extends longitudinally to a spacer end, and includes a grip element and a plurality of notches. The grip element is arranged at the spacer end laterally between the notches. The grip element at least partially defines the notches. The notches extend radially and longitudinally into the root spacer.

First claim

What is claimed is:

1. An assembly with an axis, comprising:
a rotor disk including a slot that extends axially into the rotor disk;
a rotor blade including a blade root arranged within the slot; and
a root spacer arranged with the slot between the rotor disk and the blade root, the root spacer extending axially to a spacer end and including a grip element and a plurality of notches;
wherein the grip element is arranged at the spacer end circumferentially between the notches, and at least partially defines the notches;
wherein at least one of the notches has an open end at the spaces end positioned intermediate outbound edges of the root spacer and the at least one of the notches extends radially and axially into the root spacer and one of the notches extends circumferentially within the root spacer;
wherein the grip element includes a base and a flange that extends circumferentially from the base; and
wherein the base and the flange at least partially define a first one of the notches.

2. The assembly of claim 1 , wherein each of the notches extends circumferentially within the root spacer.

3. The assembly of claim 1 , wherein a first one of the notches extends radially through the root spacer.

4. The assembly of claim 1 , wherein a first one of the notches extends radially into the root spacer to a surface.

5. The assembly of claim 1 , wherein
the flange comprises a first flange, and the grip element further includes a second flange that extends circumferentially from the base;
the base is arranged circumferentially between the first flange and the second flange; and
the base and the second flange at least partially define a second one of the notches.

6. The assembly of claim 1 , wherein the grip element is axially recessed from the spacer end.

7. The assembly of claim 1 , wherein
the slot extends axially into the rotor disk from a disk end; and
the spacer end is arranged at the disk end.

8. The assembly of claim 1 , wherein
the blade root extends axially to a root end; and
the spacer end is approximately axially aligned with the root end.

9. The assembly of claim 1 , wherein
the slot is one of a plurality of slots that extend axially into the rotor disk;
the rotor blade is one of a plurality of rotor blades arranged circumferentially around the axis, and each of the rotor blades includes a blade root arranged within a respective one of the slots; and
the root spacer is one of a plurality of root spacers, each of the root spacers is arranged within a respective one of the slots between the rotor disk and a respective one of the blade roots, and at least a plurality of the root spacers each include a grip element.

10. The assembly of claim 1 , wherein the rotor blade comprises a turbine engine fan blade.

11. The assembly of claim 1 , further comprising:
a plurality of turbine engine rotors arranged along the axis and including a first rotor and a second rotor, wherein one of the engine rotors includes the rotor disk, the rotor blade and the root spacer; and
a gear train that connects the first rotor to the second rotor.

12. The assembly of claim 11 , wherein the first rotor comprises a fan rotor that includes the rotor disk, the rotor blade and the root spacer.

13. An assembly with an axis, comprising:
a rotor disk including a slot that extends axially into the rotor disk;
a rotor blade including a blade root arranged within the slot; and
a root spacer arranged with the slot between the rotor disk and the blade root, the root spacer extending axially to a spacer end and including a grip element and a plurality of notches;
wherein the grip element is arranged at the spacer end circumferentially between the notches, and at least partially defines the notches;
wherein at least one of the notches has an open end at the spacer end positioned intermediate outbound edges of the root spacer and the at least one of the notches extends radially and axially into the root spacer, and one of the notches extends circumferentially within the root spacer; and
wherein the grip element extends axially to the spacer end.

14. An assembly with an axis, comprising:
a rotor disk including a slot that extends axially into the rotor disk;
a rotor blade including a blade root arranged within the slot; and a root spacer arranged with the slot between the rotor disk and the blade root, the root spacer extending axially to a spacer end and including a grip element and a plurality of notches;
wherein the grip element is arranged at the spacer end circumferentially between the notches, and at least partially defines the notches;
wherein at least one of the notches has an open end at the spacer end positioned intermediate outbound edges of the root spacer and the at least one of the notches extends radially and axially into the root spacer, and one of the notches extends circumferentially within the root spacer;
wherein the root spacer includes an inner surface and an outer surface;
wherein the inner surface is positioned next to the rotor disk;
wherein the outer surface is positioned next to the blade root; and
wherein the root spacer is configured as a solid monolithic body such that material of the root spacer extends uninterrupted between the inner surface and the outer surface.

15. An assembly disposed along a longitudinal axis, comprising:
a rotor disk including a slot that extends axially into the rotor disk;
a rotor blade including a blade root arranged within the slot; and
a root spacer formed of a single layer of material being axially arranged with the slot between the rotor disk and the blade root, the root spacer including an axial spacer end and at least two axial portions, the at least two axial portions including a generally planar spacer base portion in communication with one or more spacer side portions, the one or more spacer side portions each having an angularly disposed, non-parallel relationship to the spacer base portion, the spacer base portion generally disposed parallel to the longitudinal axis, and the spacer base portion including a grip element and defining a plurality of notches;
wherein the grip element is arranged in the spacer base portion at the axial spacer end, the grip element is circumferentially between the plurality of notches, and the grip element at least partially defines each notch of the plurality of notches; and
wherein each notch of the plurality of notches extends radially and axially into the spacer base portion of the root spacer, and at least one of the plurality of notches extends circumferentially within the spacer base portion of the root spacer.

Assignees

• United Technologies Corp

Inventors

• Drozdenko Lee
• Moffitt James H

Classifications

• B25B7/08

  with fixed fulcrum · CPC title

• F01D5/30

  Fixing blades to rotors; Blade roots {; Blade spacers} · CPC title

• B25B7/02

  Jaws · CPC title

• F01D25/285

  Temporary support structures, e.g. for testing, assembling, installing, repairing; Assembly methods using such structures · CPC title

• F01D5/3092

  Protective layers between blade root and rotor disc surfaces, e.g. anti-friction layers (F01D5/288 takes precedence) · CPC title