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Repair process for front honeycomb sandwich structure of inner cylinder of engine reverse-pushing sliding door

A technology of honeycomb sandwich structure and sliding door is applied in the field of aircraft maintenance to achieve the effect of expanding the scope of repair, ensuring reliability and reducing maintenance costs

Active Publication Date: 2022-04-22
中国南方航空股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the honeycomb sandwich structure at the front of the inner cylinder of the translation door will suffer damage ranging from tens of inches to hundreds of inches. There is no corresponding repair in the existing maintenance manual, and large-scale extended maintenance is required.

Method used

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  • Repair process for front honeycomb sandwich structure of inner cylinder of engine reverse-pushing sliding door
  • Repair process for front honeycomb sandwich structure of inner cylinder of engine reverse-pushing sliding door
  • Repair process for front honeycomb sandwich structure of inner cylinder of engine reverse-pushing sliding door

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] The repair process of the honeycomb sandwich structure at the front of the inner cylinder of the reverse thrust translation door of the engine provided in this embodiment includes the following steps:

[0052] (1) Removing the damaged area: cutting and removing the entire perforated skin, partial honeycomb core and partial solid skin at the front of the inner cylinder of the damaged engine reverse thrust translation door (accounting for about 1 / 3 of the total length of the translation door), among which The inner barrel of the engine reverse thrust translation door has a semi-cylindrical structure (such as figure 1 shown), the honeycomb sandwich structure consists of perforated skin 1, honeycomb core 2 and solid skin 3 from inside to outside, as figure 2 shown;

[0053] (2) Making repair molds: The dimensional parameters required for the mold making to support the inner cylinder of the reverse thrust translation door of the engine were obtained through 3D scanning. C...

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Abstract

The invention discloses a process for repairing a honeycomb sandwich structure at the front part of an inner cylinder of an engine reverse-pushing sliding door. The process comprises the following steps: (1) removing a damaged area; (2) manufacturing a repair mold; (3) manufacturing a repairing part; (4) positioning and repairing the component; (5) surface treatment of the repaired part; and (6) mounting and curing the repaired part. According to the process, the silencing effect and the repairing quality can be both considered, and the radian, the curvature and the outline of the formed surface can be maintained.

Description

technical field [0001] The invention belongs to the technical field of aircraft maintenance, and in particular relates to a process for repairing a honeycomb sandwich structure at the front of an inner cylinder of an engine reverse thrust translation door. Background technique [0002] The thrust reverser device is composed of C duct, baffle door and sliding door. When the aircraft lands, the baffle door assembly is pulled by the backward movement of the translation door and leaks out of the exhaust grille, intercepting the high-speed outer culvert airflow flowing backward, making it Turn back into the grille and spray out obliquely forward, generating strong backward resistance, assisting the aircraft to decelerate and brake. Due to the design flaws of the aircraft structure, the honeycomb sandwich structure at the front of the inner cylinder of the V2500 reverse thrust translation door will directly suffer from the impact and shear of the high-speed airflow and the grindin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C73/12B29C73/32B29C73/26B29L31/30
CPCB29C73/12B29C73/32B29C73/26B29C73/105B29C2073/262B29C2073/268B29C2073/264B29L2031/3076Y02T50/40
Inventor 刘文新李志歆高赛许朋臧忠海
Owner 中国南方航空股份有限公司