Axial Turbomachine Stator with Segmented Inner Shell

a technology of axial turbomachine and inner shell, which is applied in the direction of motors, air transportation, leakage prevention, etc., can solve the problems of increasing the weight of the shell, the shell is subject to frequency excitation, and the inner shell can develop destructive vibrational modes

Inactive Publication Date: 2014-05-29
TECHSPACE AERO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in operation, such a shell is subjected to frequency excitations.
As a consequence of this, the inner shell can develop destructive...

Method used

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  • Axial Turbomachine Stator with Segmented Inner Shell
  • Axial Turbomachine Stator with Segmented Inner Shell
  • Axial Turbomachine Stator with Segmented Inner Shell

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Embodiment Construction

[0015]The present application aims to solve at least one of the problems present in the prior art. More particularly, the present application aims to improve the vibrational behaviour of a stator with a segmented inner shell. The present application also aims to improve the construction of stators, particularly in terms of the connections between the blades and the inner shell.

[0016]The present application relates to a stator of an axial turbomachine compressor comprising an annular row of blades extending radially, an inner shell through which the inner tips of the blades pass, the said annular shell being formed of segments arranged end to end, wherein it further comprises at least one strip extending circumferentially along the inner surface of the shell and mating with an engaging member on the inner tips of the blades for their retention, the said strip(s) extending continuously along at least two adjacent annular segments.

[0017]According to an advantageous embodiment of the pr...

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PUM

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Abstract

The present application relates to a compressor stator of an axial turbomachine having an inner shell formed of a plurality of annular segments arranged end to end, a layer of abradable material applied on the inner face of the shell, and an annular array of blades connected to the shell. The stator has at least one strip located in the layer of abradable material and extending from either side of the junctions between two adjacent annular segments. The inner tips of the blades have hooks mating mechanically with the strip.

Description

[0001]This application claims priority under 35 U.S.C. §119 to European Patent Application No. 12194325.2, filed 27 Nov. 2012, which is incorporated herein by reference for all purposes.BACKGROUND[0002]1. Field of the Application[0003]The present application relates to an axial turbomachine. More particularly, the present application relates to a stator of an axial turbomachine comprising a segmented inner shell. The present application also relates to a stator assembly process. The present application also relates to an axial compressor.[0004]2. Description of Related Art[0005]In order to guide an annular flow, an axial turbomachine is fitted with coaxial shells defining the inside and outside of the flow. In a stator, internal shells are essentially connected to the stator blade tips. They form cylindrical walls having openings through which the stator blade tips are inserted so as to fix them.[0006]The openings are larger in order to facilitate inserting the blade tips, the gaps ...

Claims

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Application Information

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IPC IPC(8): F01D9/02
CPCF01D9/02F01D9/042F01D11/001Y02T50/60
Inventor GRELIN, HERVE
Owner TECHSPACE AERO
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