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Method for manufacturing hollow blade

A technology of hollow blades and blades, which is applied in the direction of supporting elements of blades, air transportation, metal rolling, etc., and can solve the problems of expensive titanium alloys, etc.

Active Publication Date: 2011-02-09
SN DETUDE & DE CONSTR DE MOTEURS DAVIATION S N E C M A
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these titanium alloys are expensive and their use is only justified if the blades are subjected to considerable mechanical stress and / or high temperatures

Method used

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  • Method for manufacturing hollow blade
  • Method for manufacturing hollow blade
  • Method for manufacturing hollow blade

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Embodiment Construction

[0017] see first figure 1 , which shows a turbomachine hollow blade 10 obtained by the method according to the invention. Such a blade 10 comprises a foot 12 connected to a rotor blade 14 whose outer surfaces, referred to as upper surface 16 and lower surface 18 , are connected by a leading edge 20 and a trailing edge 22 . The feet 12 are intended to engage in corresponding slots of a rotor disk (not shown) of the turbomachine, while the rotor blades 14 are to be arranged in the flow ducts of the cool air flow of the turbomachine.

[0018] According to the method of the present invention, for example figure 1 The blade 10 shown in , the blade 10 is lightweight and durable. For this purpose, the method proposes to use a blade 10 made of aluminum alloy and to realize the hollow portion 24 by using a copper alloy insert.

[0019] The method includes doing so by drilling a channel in an aluminum blade blank.

[0020] For cost reasons, the blade blank is preferably realized as ...

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PUM

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Abstract

The invention relates to a method for manufacturing a hollow blade (10) for a turbomachine that comprises drilling channels (24) into a blank of the blade, placing inserts into the channels (24), forging the blank, and removing the inserts by chemical dissolution, and is characterized in that the blade (10) is an aluminum alloy and the inserts are a copper alloy.

Description

technical field [0001] The invention relates to a method for manufacturing hollow blades for turbomachines. Background technique [0002] In a turbine, fixed or moving blades will be placed in the circulation ducts of the air flow. In order to reduce the weight of turbines, it has been proposed to use composite material blades. However, these materials are very expensive and the blades are technically difficult to manufacture. Another solution consists in lightening the blade by forming an indentation in the blade. To this end, channels are formed in the blade blank and filled with an insert of material different from the blade. The forging step involves the application of mechanical forces to the blade provided with the insert, which deforms the blank to give the turbine blade its final form. The inserts are finally removed by chemical dissolution, resulting in a blade that is light and resistant to mechanical stress. [0003] The choice of the insert is particularly c...

Claims

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Application Information

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IPC IPC(8): B21J5/12F01D5/18B21C23/16B21K3/04B23P15/02B21H7/16
CPCY02T50/672B21K3/04F05D2230/11B23P15/02Y02T50/676F01D5/18Y10T29/49339Y02T50/60
Inventor 弗兰科伊斯·伯特兰纪尧姆·杜克罗斯吉恩-米歇尔·帕特里克·莫里斯·弗兰切特奥利弗·迈克尔·莫利纳里
Owner SN DETUDE & DE CONSTR DE MOTEURS DAVIATION S N E C M A