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Browse Prior Art Database

Wedge Face Riffle Seals with Axial Retention

IP.com Disclosure Number: IPCOM000210682D
Original Publication Date: 2011-Sep-08
Included in the Prior Art Database: 2011-Sep-08
Document File: 1 page(s) / 67K

Publishing Venue

Siemens

Related People

Juergen Carstens: CONTACT

Abstract

In order to prevent leakages or hot gas ingestion gaps between adjacent single or segmented turbine vanes need to be sealed by a sealing. The vanes need a sealing design on the wedge face side. Usually the rear stages of the turbine are relatively large parts which are therefore subjected to relative high deformations. These deformations can cause movement of the seals between two parts resp. turbine vanes. Thus, movement of the seals can cause damaging of parts or interaction with other parts. Within the operation of the parts, the axial movement of the seals causes an increase of part refurbishments.

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Wedge Face Riffle Seals with Axial Retention

Idea: Fathi Ahmad, DE-Mühlheim a. d. Ruhr

In order to prevent leakages or hot gas ingestion gaps between adjacent single or segmented turbine vanes need to be sealed by a sealing. The vanes need a sealing design on the wedge face side. Usually the rear stages of the turbine are relatively large parts which are therefore subjected to relative high deformations. These deformations can cause movement of the seals between two parts resp. turbine vanes. Thus, movement of the seals can cause damaging of parts or interaction with other parts. Within the operation of the parts, the axial movement of the seals causes an increase of part refurbishments.

It is proposed that the rifle seals used in turbines to prevent leakages and hot gas ingestion are equipped with axial retention features as shown in figure 1 in order to reduce axial movement of the seal.

The benefits of this proposal are that the operation risk of larger parts which are subjected to relatively large deformations is reduced. Further, the efforts needed for part refurbishment is reduced as well as the number of defects during the hot gas parts inspection. The proposed seal can also be designed without riffles for other seal applications.

Figure 1: Riffle seal with axial retention

Riffles

Riffles

Old seal design

New seal design

© SIEMENS AG 2011 fi...