Replacement method of V2500 engine reverse thrust C duct sliding rail structure

Abstract

The invention discloses a replacement method of a V2500 engine reverse thrust C duct sliding rail structure, comprising the following steps of: (S1) obtaining a whole set of mathematical models of a V2500 engine reverse thrust C duct through reverse engineering to obtain the structural size of the reverse thrust C duct; (2) manufacturing a fixture according to the structural size of the reverse thrust C duct; (S3) carrying out actual verification on the fixture; (S4) manufacturing an articulated arm, wherein the articulated arm is arranged below the fixture and a fixture positioning guide railis further arranged below the articulated arm; and (S5) positioning an old reverse thrust C duct sliding rail structure through the fixture, the articulated arm and the fixture positioning guide rail, then disassembling the old sliding rail structure, installing a new sliding rail structure in situ, and finally removing the fixture, the articulated arm and the fixture positioning guide rail, thereby realizing the replacement of the V2500 engine reverse thrust C duct sliding rail structure. According to the method, by designing the fixture, the adjustable articulated arm and the fixture positioning guide rail, accurate replacement of the V2500 engine reverse thrust C duct sliding rail can be achieved.

Description

technical field [0001] The invention belongs to the technical field of aircraft maintenance, and in particular relates to a method for replacing a thrust reverse C duct slide rail structure of a V2500 engine. Background technique [0002] The reverse thrust needs to be actuated once in each flight cycle, and each aircraft in service needs to perform 4 flight cycles and actuate 4 times on average every day. During the landing and running of the aircraft, the thrust reverser structure has to bear about 70% of the thrust of the aircraft engine and change the thrust to the opposite direction, thereby rapidly reducing the aircraft speed. During the whole actuation process, the thrust reverser structure is subjected to complex high temperature, high vibration and high stress. With the increase of service time, the thrust reverser structure is prone to structural damage, and the wear of the reverse thrust C duct slide rail is the most common. [0003] After the slide rail is worn...

AI Technical Summary

Problems solved by technology

[0005] Due to the technical blockade of OEM (the manufacturer that designs and manufactures the aero-engine nacelle), all engine nacelle tooling frames such as the thrust reverser C duct are not sold to the outside world. When the slide rails are severely damaged, they must be sent back to the original factory for repair or Replacement (due to the almost monopoly of the market, the quotation is very high). By inquiring the repair record of the C duct in recent years, the company analyzed the proportion and cost of slide rail repair and replacement, resulting in high repair costs for the company.

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