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Method for manufacturing a base body of a turbine bucket

A technology of moving blades and bases, which is applied in the direction of blade support components, engine functions, engine components, etc., and can solve problems such as resonance frequency excitation frequency deviation

Active Publication Date: 2020-04-24
SIEMENS ENERGY GLOBAL GMBH & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, in the prior art, the turbine rotor blades are designed such that the resonant frequency of the turbine rotor blades is offset relative to the excitation frequency of the stationary gas turbine

Method used

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  • Method for manufacturing a base body of a turbine bucket
  • Method for manufacturing a base body of a turbine bucket
  • Method for manufacturing a base body of a turbine bucket

Examples

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Embodiment Construction

[0022] figure 1 A method 10 according to the invention is shown. Substrate 30 for manufacturing turbine rotor blades ( image 3 ) method 10 includes providing in a first step 12 a base body 30 of a turbine rotor bucket. Base body 30 sequentially includes a bucket root 32 , a platform 34 and a bucket airfoil 36 along an imaginary longitudinal axis 31 .

[0023] The blade root 32 has a fir-tree profile when viewed perpendicular to the planar end face 38 of the bucket root 32 , merging into the underside 42 of the platform 34 via a so-called bucket neck 40 . The platform includes a hot gas side 44 opposite the bottom side 42 to which the bucket airfoil 36 is integrally connected. The bucket airfoil 36 is formed in a drop shape and is aerodynamically curved to form a pressure side 46 and a suction side 48 .

[0024] The bucket root 32 extends over a length L between two planar end faces 38 situated axially opposite each other.

[0025] In a second manufacturing step 14, a var...

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Abstract

A method for producing turbine rotor blades or the base bodies thereof includes a) providing the base body, which has, following one another along a longitudinal axis, a blade root, a blade platform and a blade airfoil, b) sensing a value of at least one parameter of the base body, at least one of the parameters representing a vibrational property of the base body, c) comparing the sensed value with a predetermined target interval, d) if the sensed value lies outside the target interval, reducing the mass of the base body, wherein the reduction of the mass takes place at the blade root and / or on the blade platform by introducing at least one recess and / or by reducing a dimension below the corresponding target value.

Description

technical field [0001] The present invention relates to a method for manufacturing a base body of a turbine rotor bucket, comprising at least the following successive steps: providing a base body comprising in sequence a bucket root, a bucket platform and a bucket wing along an imaginary longitudinal axis type; sensing a parameter value representing a vibration characteristic of the base; comparing the sensed value with a predetermined target interval; and reducing the mass of the base if the sensed value is outside the target interval. The invention also relates to a rotor bucket ring for an axial turbine rotor. Background technique [0002] It is known that turbine rotor buckets can be provided with a protective coating in order to extend their service life during gas turbine operation. During the casting process, a corrosion resistant layer of the MCrAlY type is often applied as a protective layer to the turbine rotor buckets. The surface areas to which the protective l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01D5/12F01D5/14F01D5/16F01D5/28F01D5/10F01D5/26
CPCF01D5/027F01D5/26F01D5/3007F05D2230/61F01D5/16F01D5/288F05D2230/10F05D2230/90F05D2260/96
Inventor F·阿马德R·拉杜罗维克
Owner SIEMENS ENERGY GLOBAL GMBH & CO KG
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