Rotor disk having an end-side sealing element

Patent metadata

Field	Value
Publication number	US-10196916-B2
Application number	US-201615093800-A
Country	US
Kind code	B2
Filing date	Apr 8, 2016
Priority date	Apr 8, 2016
Publication date	Feb 5, 2019
Grant date	Feb 5, 2019

Abstract

A rotor disk arrangement having a rotor disk which has, distributed around the outer circumference, a plurality of axially extending blade holding grooves and an encircling fastening protrusion and/or a plurality of fastening protrusions arranged in a circumferentially distributed manner, and having a plurality of sealing elements arranged in a circumferentially distributed manner, the sealing elements covering the blade holding grooves at least in portions on the end side and having, on the side facing the rotor axis, at least one fastening portion that bears against the underside of the fastening protrusion, wherein the fastening protrusion is embodied in an undercut manner, wherein the distance thereof from the rotor axis at the free end facing away from the rotor disk is less than in a region within the fastening protrusion.

First claim

The invention claimed is:

1. A rotor disk arrangement having
a rotor disk which comprises, distributed around the outer circumference, a plurality of axially extending blade holding grooves and an encircling fastening protrusion and/or a plurality of fastening protrusions arranged in a circumferentially distributed manner, and a plurality of sealing elements arranged in a circumferentially distributed manner, said sealing elements covering the blade holding grooves at least in portions on an end side and comprising, on the side facing a rotor axis, at least one fastening portion that bears against the underside of the fastening protrusion,
wherein the fastening protrusion is embodied in an undercut manner, wherein the distance thereof from the rotor axis at a free end facing away from the rotor disk is less than in a region within the fastening protrusion,
a first sealing element that comprises, on at least one first side periphery, a sealing tab facing the end side, and
a second adjacent sealing element that comprises, on a second side periphery, a sealing shoulder in which the sealing tab engages.

2. The rotor disk arrangement as claimed in claim 1 ,
wherein all of the sealing elements together form a substantially closed rotary body and/or completely cover the blade holding grooves on the end side.

3. The rotor disk arrangement as claimed in claim 1 , further comprising
a bearing surface, facing the rotor axis, of the fastening protrusion that is embodied in a planar manner and/or as a portion of a conical surface, the distance of said bearing surface from the rotor axis decreasing continuously toward the free end, wherein the fastening protrusion has a constant thickness or a thickness that decreases toward the free end, perpendicularly to the bearing surface.

4. The rotor disk arrangement as claimed in claim 1 ,
wherein the free end of the fastening protrusion is formed by a securing web extending to the rotor axis, said securing web axially bounding a radially inwardly opening bearing groove in the fastening protrusion.

5. The rotor disk arrangement as claimed in claim 1 ,
wherein the fastening portion on the sealing element extends axially in a manner facing the rotor disk, and in the circumferential direction across the entire width of the sealing element.

6. The rotor disk arrangement as claimed in claim 1 , further comprising
a fastening receptacle that is recessed axially into the sealing element or passes through the sealing element and is spaced apart from side peripheries of the sealing element that is arranged radially above the fastening portion.

7. The rotor disk arrangement as claimed in claim 1 ,
wherein the rotor disk has at least two undercut radial depressions that are arranged in a circumferentially distributed manner in each case between blade holding grooves, and at least two sealing elements each have at least one elevation that engages in the depression.

8. The rotor disk arrangement as claimed in claim 7 ,
wherein a depression is arranged in front of the end face in a manner opening toward the rotor axis, and extends radially with respect to the rotor axis.

9. The rotor disk arrangement as claimed in claim 7 ,
wherein the fastening receptacle forms a free space radially above the fastening protrusion, said free space allowing a removal movement, at least toward the rotor axis, of the elevation out of the depression.

10. The rotor disk arrangement as claimed in claim 9 ,
wherein the free space is covered by a securing plate.

11. The rotor disk arrangement as claimed in claim 10 ,
wherein the securing plate is secured with a peripheral portion in a radially extending plate groove in the fastening protrusion and/or is secured axially in the sealing element and radially in the direction of the bottom of the plate groove, wherein the opposite peripheral portion bears radially against an axially extending securing protrusion.

12. The rotor disk arrangement as claimed in claim 1 , further comprising
a securing element that passes through the sealing element at least in portions and engages in a cutout in the rotor disk, radially beneath the fastening protrusion.

13. The rotor disk arrangement as claimed in claim 1 , further comprising
a blocking element that is arranged on at least one rotor blade, said blocking element extending axially beyond the end side and engaging in a cutout, facing the end side, in the sealing element.

14. The rotor disk arrangement as claimed in claim 1 ,
wherein the sealing element has a substantially flat sealing portion facing the rotor axis, and a radially outwardly facing wing portion which is embodied in a radially outwardly opening U-shaped or V-shaped manner in a cross section along the rotor axis.

15. The rotor disk arrangement as claimed in claim 1 , wherein
the first sealing element comprises, on each of the first side peripheries that are opposite one another in the circumferential direction, a respective sealing tab, with a constant material thickness, and
the second adjacent sealing element comprises, on each of the second side peripheries that are opposite one another in the circumferential direction, a respective sealing shoulder.

16. The rotor disk arrangement as claimed in claim 1 , further comprising
at least one sealing element that has side peripheries that are opposite one another in the circumferential direction and extend parallel to one another.

17. A rotor having
a rotor disk arrangement as claimed in claim 1 .

18. A gas turbine having
a rotor as claimed in claim 17 .

19. A rotor disk arrangement having
a rotor disk which comprises, distributed around the outer circumference, a plurality of axially extending blade holding grooves and an encircling fastening protrusion and/or a plurality of fastening protrusions arranged in a circumferentially distributed manner, and a plurality of sealing elements arranged in a circumferentially distributed manner, said sealing elements covering the blade holding grooves at least in portions on an end side and comprising, on the side facing a rotor axis, at least one fastening portion that bears against the underside of the fastening protrusion,
wherein the fastening protrusion is embodied in an undercut manner, wherein the distance thereof from the rotor axis at a free end facing away from the rotor disk is less than in a region within the fastening protrusion,
wherein the rotor disk has at least two undercut radial depressions that are arranged in a circumferentially distributed manner in each case between blade holding grooves, and at least two sealing elements each have at least one elevation that engages in the depression,
wherein the fastening receptacle forms a free space radially above the fastening protrusion, said free space allowing a removal movement, at least toward the rotor axis, of the elevation out of the depression, and
wherein the free space is covered by a securing plate.

20. A rotor disk arrangement having
a rotor disk which comprises, distributed around the outer circumference, a plurality of axially extending blade holding grooves and an encircling fastening protrusion and/or a plurality of fastening protrusions arranged in a circumferentially distributed manner, and a plurality of sealing elements arranged in a circumferentially distributed manner, said sealing elements covering the blade holding grooves at least in portions on an end side and comprising, on the side facing a rotor axis, at least one fastening portion that bears against the und

Assignees

• Siemens Ag

Inventors

• Matthews Roger
• Kolk Karsten
• Schröder Peter
• Springborn Dirk
• Veitsman Vyacheslav

Classifications

• F01D5/02

  Blade-carrying members, e.g. rotors (rotors of non-bladed type F01D1/34; stators F01D9/00 {; selecting particular materials F01D5/28}) · CPC title

• F01D5/3015 Primary

  with side plates · CPC title

• F01D11/006 Primary

  Sealing the gap between rotor blades or blades and rotor · CPC title

• F05D2220/32

  in gas turbines · CPC title