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Radial fixation of a turbine vane

IP.com Disclosure Number: IPCOM000190462D
Publication Date: 2009-Dec-01
Document File: 3 page(s) / 505K

Publishing Venue

The IP.com Prior Art Database

Related People

Jürgen Hoffmann: ATTORNEY

Abstract

Turbine vanes are fixed to the stator or vane carrier. They have to be fixed to avoid axial and radial movements. The target of this invention is to provide a radial fixation without the use of springs, and which does not require any fixation by welding to the vanes or any structural parts. To this end a locking pin holding its own securing pin and a method to assemble this fixation is proposed.

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Radial fixation of a turbine vane:

Inventors: Scott Wetzel, Marcel König, Jürgen Pacholeck

Abstract:

Turbine vanes are fixed to the stator or vane carrier. They have to be fixed to avoid axial and radial movements. The target of this invention is to provide a radial fixation without the use of springs, and which does not require any fixation by welding to the vanes or any structural parts. To this end a locking pin holding its own securing pin and a method to assemble this fixation is proposed.

State of the art:

Turbine vanes are fixed to the stator or vane carrier. They have to be fixed to avoid axial and radial movements. In known fixations, the vanes are for example guided in rail like structures in the vane carrier. These hold the vanes and keep them in an axially fixed position. However, due to aerodynamic forces a radial fixation of the vanes is also required. In this example of the state of the art looking pins are used to keep the vanes in their radial position. The looking pins are kept in their position by the use of spring forces. At high temperatures spring loaded fixations can lose their holding force.

Other types of fixation are for example known from the EP1744014 or from the EP1483482.

Summary of the invention:

The target of this invention is to provide a radial fixation without the use of springs, and which does not require any fixation by welding to the vanes or any structural parts. To this end a locking pin holding its own securing pin and method of radial fixation of a vane using this pin is proposed.

Fig.1 shows the general arrangement of the vanes in the turbine vane carrier. In this example vanes are combined to form vane segments. Each vane segment is fixed in its radial position by at least one locking pin.

Fig. 1 Vane segment fixed in turbine vane carrier with a locking pin

Locking Pin

Vane

Turbine vane carrier

© ALSTOM 2009

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The detailed structure of the locking pin, the vane, and turbine vane carrier is shown in Fig. 2

Fig. 2 Locking pin secured in turb...