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Turbine engine blade preform

A technology of preformed parts and blades, which is applied in the direction of blade support elements, casting components, engine components, etc., and can solve problems such as poor materials

Active Publication Date: 2016-01-20
SN DETUDE & DE CONSTR DE MOTEURS DAVIATION S N E C M A
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, when fluid material flows into the mold, the mold throat region slows the flow of material at these locations, which can lead to set interruptions and cold laps that can lead to poor set and mechanical defects in the material. Formation, e.g. of cracks in the connection region to the side web of the preform at the blade root

Method used

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  • Turbine engine blade preform
  • Turbine engine blade preform
  • Turbine engine blade preform

Examples

Experimental program
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Embodiment Construction

[0026] first reference figure 1 , which shows a one-piece turbine engine blade preform 10 according to the prior art obtained by forming in a mould, and comprising along axis 12: extending longitudinally in the upstream / downstream direction and at A portion of the blade root 14 , the platform 16 , the blade 18 and the blade root 20 have a generally rectangular shape in cross-section. From upstream or downstream, the profile of the root is U-shaped, the branches of which are approximately parallel to and formed by the sides 42 of the blade root. exist figure 1 The blades shown in more specifically show blades installed in a turbine of a turbine engine.

[0027] The mold 22 comprises an inner cavity 24 whose three-dimensional shape is determined such that the desired three-dimensional shape of the blade pre-form is obtained by filling the mold with a liquid material. In practice, the liquid material is injected into the mold 22 from the lower part 23 of the mold 12 correspond...

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PUM

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Abstract

The invention relates to a blade preform (46) including a strut connecting a platform (16) to a blade root portion (14) extending longitudinally in an upstream-downstream direction, an upstream web (26) and a downstream (28) web, which each extend in a direction substantially perpendicular to the longitudinal direction of the blade root and are formed at the upstream and downstream ends of the strut. The upstream (26) and downstream (28) webs connect the upstream and downstream ends of the platform (16) to the upstream and downstream ends of the blade root (14). According to the invention, the blade root (14) extends in a direction perpendicular to the longitudinal direction of the blade root over a distance smaller than that of the upstream and downstream webs (26, 28) and the side edges (40) of each web (26, 28) are extended by walls that converge (44) at the flanks of the blade root.

Description

technical field [0001] The present invention relates to a turbine engine blade preform, such as in particular a turbine blade preform in a turbine engine, as well as a mold and a method for obtaining the blade preform. Background technique [0002] In current technology, turbine blades are obtained as a one-piece part by forming using a mold comprising a cavity whose three-dimensional shape makes it possible to obtain the desired shape in a form-fitting manner. In practice, the part obtained after the shaping step consists of a blade preform which has to be machined to obtain the desired final shape and dimensions. [0003] Thus, the turbine blade preform includes struts connecting the blade root to the platform. The blade preform also has two transverse upstream and downstream webs formed at the upstream and downstream ends of the strut and connecting the upstream and downstream edges of the platform to the blade root respectively. upstream end and downstream end. It sho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C9/06B22C9/22F01D5/12
CPCB22C9/06B22C9/22F01D5/141F05D2230/21F05D2230/61B22C9/10B22D25/02
Inventor 塞巴斯蒂安·康格兰特拉斐尔·都佩尔纪尧姆·克莱因大卫·马修巴-帕克·唐
Owner SN DETUDE & DE CONSTR DE MOTEURS DAVIATION S N E C M A