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Radial seal pin

a technology of radial seals and pins, which is applied in the direction of liquid fuel engines, vessel construction, marine propulsion, etc., can solve the problems of reducing the purge pressure in the bucket shank cavity, mushrooming or flattening ends, and leaking even with properly functioning pins

Inactive Publication Date: 2011-04-07
GENERAL ELECTRIC CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Current issues with such radial seal pins include mushrooming or flattened ends due to the use of low creep resistant material, buckling due to inadequate head space, pin binding, pin lockup, and simple pin wear.
Moreover, leakage is still an issue even with properly functioning pins.
The cross-shank leakage may lower the purge pressure in the bucket shank cavity.
Such lower purge pressure may lead to possible hot gas ingestion and subsequent hardware distress.

Method used

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Examples

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Embodiment Construction

[0020]Referring now to the drawings, in which like numbers refer to like elements throughout the several views, FIG. 1 shows a side cross-sectional view of a gas turbine engine 10. As is known, the gas turbine engine 10 may include a compressor 12 to compress an incoming flow of air. The compressor 12 delivers the compressed flow of air to a combustor 14. The combustor 14 mixes the compressed flow of air with a compressed flow of fuel and ignites the mixture. (Although only a single combustor 14 is shown, the gas turbine engine 10 may include any number of combustors 14.) The hot combustion gases are in turn delivered to a turbine 16. The hot combustion gases drive the turbine 16 so as to produce mechanical work. The mechanical work produced in the turbine 16 drives the compressor 12 and an external load such as an electrical generator and the like.

[0021]The gas turbine engine 10 may use natural gas, various other types of syngas, and other types of fuels. The gas turbine engine may...

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PUM

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Abstract

The present application provides a turbine bucket. The turbine bucket may include a shank, a radial seal pin slot positioned on the shank, and a seal pin positioned within the radial seal pin slot. The seal pin may include a pair of shouldered ends.

Description

TECHNICAL FIELD[0001]The present application relates generally to gas turbine engines and more particularly relates to a radial seal pin design for preventing leakage between gas turbine buckets.BACKGROUND OF THE INVENTION[0002]Gas turbines generally include a rotor with a number of circumferentially spaced blades or buckets. As is known, the buckets generally include an airfoil, a platform, a shank, a dovetail, and other elements. The dovetail may be positioned about a rotor and secured therein. The airfoils project into a hot combustion gas path produced by a combustor so as to convert the kinetic energy of the gas into rotational mechanical energy.[0003]A radial seal pin may be used between the shanks of adjacent buckets so as to seal against cross-shank leakage with respect to gas turbines using long shank bucket designs. Generally described, the pin contacts a seal slot face angle under centrifugal load due to rotation and slides towards the side seal rails. The slot face angle...

Claims

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Application Information

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IPC IPC(8): F01D5/22
CPCF01D11/005F01D5/3015
Inventor WALUNJ, JALINDAR APPAHONKOMP, MARK STEVEN
Owner GENERAL ELECTRIC CO