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Impingement cooling flow guide pipe laser welding-solid medium integrated forming method

A laser welding and draft tube technology, which is applied in the cooling of the engine, the cooling of the turbine/propulsion device, the engine components, etc., can solve the problems of wrinkling, broken wall thickness and unevenness of the draft tube, and avoid wrinkling. , low cost, simple mold effect

Inactive Publication Date: 2021-04-09
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of this, the present invention provides an impingement cooling duct laser welding-solid medium integrated forming method, which is used to simplify the duct manufacturing process and avoid wrinkling during the forming process of the difficult-to-deform ultra-thin-wall variable-section duct , cracks and uneven wall thickness and other defects

Method used

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  • Impingement cooling flow guide pipe laser welding-solid medium integrated forming method
  • Impingement cooling flow guide pipe laser welding-solid medium integrated forming method
  • Impingement cooling flow guide pipe laser welding-solid medium integrated forming method

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Embodiment 1

[0058] to manufacture as Figure 4 Take the diversion tube shown as an example, the material is GH3039, the wall thickness is 0.3mm, the cross-sectional area of ​​the diversion tube along the length L direction gradually increases from the opening A on one side to the opening B on the other side, and the wall of the diversion tube There are several arrays of holes C, the perimeters of openings A and B on both sides are 195mm and 220mm respectively, and the length L of the draft tube is 80mm.

[0059] Such as Figure 4 The laser welding-solid medium integrated forming method of the flow guide tube specifically includes the following steps:

[0060] Step 1: According to the size of the draft tube, select an appropriate margin, and determine that the shape of the draft tube blank is a fan ring, such as Figure 5 As shown, the inner side length l of the fan ring 1 185mm, the outer length l 2 243mm, side length l 3 is 112mm; according to the size determined above, the GH3039 t...

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Abstract

The invention discloses an impingement cooling flow guide pipe laser welding-solid medium integrated forming method. The method comprises the following steps: designing a flow guide pipe blank and a pre-bending die according to the size of a flow guide pipe; carrying out pre-bending, laser welding, tin filling and other steps on the flow guide pipe blank to obtain a prefabricated blank; carrying out preforming, pressure maintaining, final forming and other steps on the prefabricated blank to form a flow guide pipe part; and carrying out tin melting, ultrasonic cleaning, laser drilling and other steps on the flow guide pipe part to obtain a qualified flow guide pipe. The forming method provided by the invention has the advantages of simple die, low cost, high efficiency, reusability of a solid medium and the like, can effectively form an impingement cooling flow guide pipe meeting the dimensional precision and use requirements, and can avoid the defects of wrinkling, cracking, non-uniform wall thickness and the like.

Description

technical field [0001] The invention relates to the technical field of processing thin-walled components of aero-engines, in particular to a laser welding-solid medium integrated forming method for an impingement cooling draft tube. Background technique [0002] The first-stage turbine guide of an aero-engine is close to the outlet of the combustion chamber, and is one of the parts with the highest temperature in the aero-engine, and it will be subject to greater thermal stress during operation. Since the guide vane does not rotate during operation, in order to reduce weight and facilitate the arrangement of cooling passages, the guide vane mostly adopts a hollow structure, and a special-shaped guide tube is inserted inside the vane to organize the flow of cooling air to form convection , impact and film cooling, to achieve the purpose of high-speed and efficient cooling and heat exchange. [0003] The impingement cooling guide tube has the characteristics of cross-sectiona...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/00F01D25/12F02C7/12
CPCB23P15/00F01D25/12F02C7/12
Inventor 孟宝刘义哲韩金全万敏
Owner BEIHANG UNIV
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