Intermediate casing ring repairing method

Abstract

The invention relates to an intermediate casing ring repairing method, and belongs to the technical field of maintenance of a component of an aero-engine. A hanging ring and an intermediate casing body is connected through a threaded pin, the hanging ring cannot be directly disassembled when the repaired, so that cracks in the hanging ring cannot be directly subject to welding repair on the intermediate casing body under the limitation of a hanging ring material, a structure and positions of the cracks of the hanging ring, the intermediate casing body is directly deformed during welding repair, and the intermediate casing body can be scrapped under serious conditions. According to the intermediate casing ring repairing method, a problem that the traditional intermediate casing ring is difficult to repair, and the method of completely disassembling the hanging ring from the intermediate casing body is provided; the intermediate casing body is not influenced during disassembly of the hanging ring, the disassembled hanging ring is subject to welding repair outside the intermediate casing body, and then the welding-repaired hanging ring is accurately installed into the intermediate casing body, so that the repair of the hanging ring of the intermediate casing is realized, the scrapping of the intermediate casing is avoided, and repair cost is reduced at the same time.

Description

technical field [0001] The invention belongs to the technical field of maintenance of aero-engine parts, in particular to a method for repairing a suspension ring of an intermediate casing. Background technique [0002] As an important load-bearing part of the aero-engine, the intermediate casing is used to divide the air at the outlet of the low-pressure compressor into two streams, inner and outer, and its shell is used to fix the engine accessories. The intermediate casing is made of titanium alloy and consists of an outer ring, a support ring, a rectifying strut and a gas distribution ring. A total of 12 rectifying struts are welded on the surface of the outer ring, and two of the engine are installed on it. The main fixed pin mounting seat, the engine accessory case fixing bracket and the lifting ring, among which the lifting ring is located at the bottom of the engine and plays the role of connecting with external equipment. Due to the relatively large force it bears, ...

AI Technical Summary

Problems solved by technology

Since the lifting ring is connected with the intermediary casing body by threaded pins, the lifting ring cannot be disassembled directly during repairs, and the lifting ring is also made of titanium alloy material, but due to the limitations of the material, structure and crack position of the lifting ring, it is not suitable to directly install it on the intermediate casing. Carry out welding repairs for the cracks of the suspension rings on the main body, because the welding repair process will directly affect the deformation of the intermediate casing body, and in serious cases will directly lead to the scrapping of the intermediate casing

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