Linear gasket for an inter-blade platform

Patent metadata

Field	Value
Publication number	US-9869323-B2
Application number	US-201314378788-A
Country	US
Kind code	B2
Filing date	Feb 15, 2013
Priority date	Feb 22, 2012
Publication date	Jan 16, 2018
Grant date	Jan 16, 2018

Abstract

A linear gasket for an inter-blade platform that presents a length, the gasket including a linear base for fastening to the inter-blade platform and a linear lip projecting from the linear base, the linear lip including a linear distal end portion configured to contact a pressure side wall or a suction side wall of a blade, a linear groove being formed between the linear base and the linear lip over at least a fraction of a length of the linear gasket. The linear distal end portion includes at least one linear slit extending over at least a fraction of the length of the gasket.

First claim

The invention claimed is:

1. A linear gasket, the gasket being configured for an inter-blade platform that presents a length, and the gasket comprising:
a linear base to fasten to the inter-blade platform and a linear lip projecting from the linear base,
the linear lip including a linear distal end portion configured to contact a pressure side wall or a suction side wall of a blade,
a linear groove being formed between the linear base and the linear lip over at least a fraction of a length of the gasket, and
the linear distal end portion including at least one linear slit extending over at least a fraction of the length of the gasket, and the at least one linear slit extending substantially parallel to a leading to trailing edge extension direction of the pressure side wall or the suction side wall of the blade when the linear distal end portion is in contact with the pressure side wall or the suction side wall of the blade.

2. An inter-blade platform linear gasket according to claim 1 , wherein the at least one linear slit is formed in a lip segment, said lip segment configured to contact the blade in a vicinity of a leading edge of the blade and/or in a vicinity of a trailing edge of the blade.

3. An inter-blade platform linear gasket according to claim 1 , wherein the linear slit extends over an entire length of the linear lip.

4. An inter-blade platform linear gasket according to claim 1 , presenting a cross-section that varies along the length of the gasket.

5. An inter-blade platform linear gasket according to claim 1 , including at least one stiffener of the lip.

6. An inter-blade platform including an inter-blade platform linear gasket according to claim 1 .

7. A rotor comprising:
a disk including, mounted at its periphery, a plurality of blades and a plurality of inter-blade platforms, an inter-blade platform being arranged between each pair of adjacent blades, at least one of the inter-blade platforms including at least one inter-blade platform linear gasket according to claim 1 .

8. A rotor according to claim 7 , wherein the lip of the linear gasket is configured to co-operate with a blade root under a leading edge of the blade, in a vicinity of the leading edge.

9. A rotor according to claim 7 , including at least two inter-blade platforms, each including the at least one inter-blade platform linear gasket, the at least two inter-blade platforms being adjacent to a common blade, the at least one linear gasket of an inter-blade platform from the at least two inter-blade platforms being arranged facing the at least one linear gasket of the other inter-blade platform from the at least two inter-blade platforms upstream from a leading edge and/or downstream from a trailing edge of said blade, the linear gaskets co-operating by pressing against each other upstream from the leading edge and/or downstream from the trailing edge of the blade.

10. A gas turbine reaction engine comprising a rotor according to claim 7 .

11. An inter-blade platform linear gasket according to claim 2 , wherein the linear distal end portion does not include any linear slit in a zone that is distinct from being in the vicinity of the leading edge of the blade and the vicinity of the trailing edge of the blade.

12. An inter-blade platform linear gasket according to claim 1 , wherein the linear base includes a protective portion that covers an edge of the inter-blade platform, and the protective portion is thicker in a segment of the gasket that is upstream from a leading edge of the blade or downstream from a trailing edge of the blade than in a segment of the gasket that is between the leading edge of the blade and the trailing edge of the blade.

13. An inter-blade platform linear gasket according to claim 1 , wherein an outer surface of the linear lip relative to the blade includes the at least one linear slit, and an inner surface of the linear lip does not include any linear slit.

14. An inter-blade platform linear gasket according to claim 1 , wherein the at least one linear slit provides flexibility to the linear distal end portion to adapt to a shape of the blade along the leading to trailing edge extension direction of the pressure side wall or the suction side wall of the blade.

15. An inter-blade platform linear gasket according to claim 1 , wherein a first side surface of the linear distal end portion is configured to contact the pressure side wall or the suction side wall of the blade, and a second side surface of the linear distal end portion that is opposite the first side surface includes the at least one linear slit.

Assignees

• Snecma

Inventors

• Ravier Anne-Laure

Classifications

• F01D11/008 Primary

  by spacer elements between the blades, e.g. independent interblade platforms · CPC title

• F04D29/16 Primary

  between pressure and suction sides · CPC title