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Turbine casing component and repair method therefor

A component, casing technology, applied in the field of turbine or turbine casing components, which can solve problems such as failure, increased stress, etc.

Pending Publication Date: 2021-11-23
GENERAL ELECTRIC CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This makes soldering easier, however, in major repairs will likely result in failure during thermal cycling of the case due to increased stress due to CTE mismatch

Method used

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  • Turbine casing component and repair method therefor
  • Turbine casing component and repair method therefor
  • Turbine casing component and repair method therefor

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Embodiment Construction

[0014] Exemplary embodiments of the present disclosure are now described with reference to the drawings, wherein like reference numerals are used to refer to like elements throughout. In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the present disclosure. However, the present disclosure may be practiced without these specific details and is not limited to the exemplary embodiments disclosed herein.

[0015] The articles "a and an" as used herein mean one or more when applied to any feature in the embodiments described in the specification and claims of the present invention. The use of "a and an" does not limit the meaning to a single feature, unless such a limitation is specifically stated. The article "said" preceding a singular or plural noun or noun phrase stands for one or more specifically named features and may have a singular or plural meaning depending on the context in...

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Abstract

The invention discloses a casing component which is configured to form part of a flow path in a turbine. The casing component includes a base (12) made of nodular cast iron, and a repaired region (14) in the base. The repaired region includes a butter layer (32) applied on the base and a fill layer (34) applied on the butter layer.

Description

technical field [0001] The present disclosure relates generally to turbine or turbine casing components and, more particularly, to their material composition, construction, and methods of repair. Background technique [0002] Nodular cast iron, such as GGG40 (DIN) grade ductile iron, is a common material used to manufacture the casings of turbines used in generating electricity. Shells are usually larger and cast in non-serial production. This often leads to casting defects because the process is not fully optimized. Additionally, castings can be damaged during machining due to damaged cutting tools or incorrect process settings. [0003] The turbine casing is exposed to high mechanical loads during operation. Vibrations can lead to fatigue of the material and thus to the formation of cracks. Thermal stresses occur during the start and stop sequences of gas turbines. These temperature fluctuations and the concomitant expansion and contraction of the casing / housing may c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P6/00B23K9/04B23K26/342F01D5/00
CPCB23P6/007B23K35/3033F01D25/24C22C19/03C22C37/04B32B15/01B32B15/013C21D2251/00F05D2230/80F01D5/005F05D2230/233B23K2101/001F01D11/08F01D25/005F05D2230/31F05D2300/111F05D2300/171
Inventor K·戴纳克S·T·斯威德朴俊永M·米库斯T·M·斯威茨克R·莱布科夫斯基
Owner GENERAL ELECTRIC CO