Sealing system and gas turbine

Patent metadata

Field	Value
Publication number	US-2016265378-A1
Application number	US-201415035400-A
Country	US
Kind code	A1
Filing date	Oct 24, 2014
Priority date	Nov 18, 2013
Publication date	Sep 15, 2016
Grant date	—

Abstract

A sealing system includes a bolt and a cover plate for sealing a joint between a rotor disk and a blade root of a rotor blade, the blade root being disposed in a blade root slot in the rotor disk. The sealing arrangement is used in particular in a gas turbine.

First claim

1 .- 7 . (canceled)

8 . A sealing system for sealing a joint between a rotor disk and a blade root, arranged in a blade root groove of the rotor disk, of a rotor blade, wherein the sealing system comprises:
a cover plate and a bolt, wherein the cover plate has an upper cover plate end side for insertion into an upper groove of the rotor blade, and a lower cover plate end side arranged opposite the upper cover plate end side for insertion into a lower groove of the rotor disk, and a projection arranged on the upper cover plate end side for engagement in a pocket of the upper groove and a recess arranged on the lower cover plate end side, wherein the bolt has a bolt length which extends from a bolt front side to a bolt rear side, wherein the bolt has an upper part and a lower part, wherein the bolt is split into the upper part and the lower part over its entire bolt length, wherein the upper part has a lug.

9 . The sealing system as claimed in claim 8 ,
wherein the upper part has an upper part underside and the lower part has a lower part upper side, wherein the upper part underside is shaped so that it corresponds with the lower part upper side in such a way that the upper part and the lower part can be displaced relative to each other in the direction of the bolt length.

10 . The sealing system as claimed in claim 9 ,
wherein one of the upper part or the lower part has a bolt groove running lengthwise with respect to the bolt length, and the other part of the upper part or the lower part has a bolt spring.

11 . The sealing system as claimed in claim 8 ,
wherein the upper part or the lower part has a depression on the bolt front side.

12 . The sealing system as claimed in claim 8 ,
wherein the lower part has an inclined face on the bolt front side.

13 . A gas turbine, comprising:
a rotor disk, a rotor blade arranged in the rotor disk, and a sealing system as claimed in claim 8 , wherein the rotor blade is provided with a blade platform, a blade leaf arranged above the blade platform, and a blade root arranged below the blade platform, wherein a protrusion is formed by the blade platform which protrudes, at a blade root end side of the rotor blade, beyond the blade root, and an upper groove, which runs along the blade root end side and is open at the bottom in the direction of the space below the blade platform, is arranged in the protrusion, wherein the upper groove has a pocket by means of which a groove width of the upper groove is enlarged along a pocket length of the pocket, wherein the rotor disk has a circumferential surface provided with at least one blade root groove for receiving the blade root of the rotor blade, and a circumferential lower groove which is open radially to the outside and arranged in the circumferential surface, and a projection with a bolt hole for receiving the bolt is arranged on the blade root groove, adjoining the lower groove, wherein the cover plate is arranged with its upper cover plate end side in the upper groove of the rotor blade, and with its lower cover plate end side in the lower groove of the rotor disk, and with its projection in the pocket of the upper groove, and wherein the cover plate is fixed by means of the bolt arranged in the bolt hole of the rotor disk and in the recess of the cover plate, wherein the lug of the bolt is arranged between the cover plate and the blade root end side.

Assignees

• Siemens Akitiengesellschaft
• Siemens Ag

Inventors

• Dungs Sascha
• Kolk Karsten
• Schröder Peter

Classifications

• F01D5/326

  Locking of axial insertion type blades by other means · CPC title

• F01D5/12

  Blades ({specially adapted for radial flow machines or engines F01D5/04}; blade roots F01D5/30; rotors with blades adjustable in operation F01D7/00; stator blades F01D9/02) · CPC title

• 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

• F01D5/3007

  of axial insertion type · CPC title

• F05D2220/32

  in gas turbines · CPC title