A kind of air intake casing frame structure and welding method thereof

Abstract

This application belongs to the technical field of welding design of intake casing frame structure, and specifically relates to an intake casing frame structure, including: intake casing; casing inner ring, which is arranged inside the intake casing, and its outer surface has multiple A connection protruding along the circumferential distribution; a plurality of fixed struts, one end of each fixed strut is the outer end, and the other end is the inner end; the outer end of each fixed strut is connected with the inner side of the intake casing, and the inner end It is correspondingly connected with a connection protrusion by welding; the inner end of each fixed support plate and the welding seam on both sides of the corresponding connection protrusion welding position are at different radial heights. In addition, it relates to a welding method for the intake casing frame structure implemented based on the above intake casing frame structure.

Description

technical field [0001] The application belongs to the technical field of welding design of an intake casing frame structure, and in particular relates to an intake casing frame structure and a welding method thereof. Background technique [0002] The frame structure of the intake casing is the load-bearing frame of the engine, which includes: the intake casing; the inner ring of the casing, which is arranged inside the intake casing, and its outer surface has a plurality of connection protrusions distributed along the circumference; One end of each fixed support plate is the outer end, and the other end is the inner end; the outer end of each fixed support plate is welded to the inside of the air intake casing, and the inner end is correspondingly welded to a connecting protrusion. [0003] Under the existing welding process, the welding part between the inner end of each fixed support plate and the corresponding connection protrusion in the intake case structure is prone to...

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Problems solved by technology

[0003] Under the existing welding process, the welding part between the inner end of each fixed support plate and the corresponding connection protrusion in the intake case structure is prone to incomplete penetration. In order to ensure that the inner end of each fixed support plate and the corresponding connection protrusion In order to check the welding quality of the welded parts, it is necessary to carry out X-ray inspection on the welded parts after the welding of the inner end of each fixed support plate and the corresponding connection protrusion. The welds on the side are at the same height in the radial direction. If the welding part between the inner end of a fixed support plate and the corresponding connection protrusion is not penetrated, the X-ray inspection can only obtain the inner end of the fixed support plate and the corresponding connection protrusion. There are welding defects in the welding part, but it is impossible to know which side of the welding seam on both sides of the inner end of the fixed support plate and the corresponding connection protruding welding part has defects. For this reason, only the inner end of the fixed support plate can be randomly selected. One side of the welding seam on both sides of the corresponding connection protruding welding part shall be repaired, and then X-ray inspection shall be carried out again. If the inner end of the fixed support plate and the corresponding connection protruding welding part are repaired The welding seam is wrong, X-ray inspection will still have welding defects at the inner end of the fixed support plate and the corresponding connection protruding welding part. The other side of the welding seam is repaired until the X-ray inspection shows that there is no welding defect in the protruding welding part between the inner end of the fixed support plate and the corresponding connection. The method of random repair welding of the welds on both sides of the protruding welding part is easy to repeatedly repair the welds on both sides of the protruding welding part between the inner end of the fixed support plate and the corresponding connection, and the inner end of the fixed support plate and the corresponding connection The more repair welding times of the welds on both sides of the protruding welding part, the greater the overall residual stress of the frame structure of the intake casing. If the residual stress cannot be effectively eliminated through the process, cracks will appear in the welding part of the frame structure of the intake casing The greater the possibility, it will seriously affect the service life of the engine, and even lead to catastrophic accidents

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