Deep repairing method for air circulation machine bearing shell

Abstract

The invention discloses a deep repairing method for an air circulation machine bearing shell. The method comprises the following steps that a machining method is used for removing a damaged part of an air compressor shell; flaw detection checking is conducted on the air compressor shell; a forging aluminum alloy material similar to an aluminum alloy material of the damaged part of the air compressor shell is selected for machining an air compressor shell lining, and the air compressor shell lining and the damaged air compressor shell are machined in cooperation; the to-be-welded air compressor shell and a to-be-welded air compressor shell lining component are cleaned thoroughly; a low-temperature assembling method is adopted for arranging the air compressor shell lining into the air compressor shell, and installing is conducted in place; an oxidization layer in the welding area is removed through grinding, and cleaning is thorough; the forging aluminum alloy material similar to the aluminum alloy material of a damaged part of a bearing supporting assembly shell is selected for machining a bearing supporting assembly shell lining, and the bearing supporting assembly shell lining and the damaged part of the bearing supporting assembly shell are machined in cooperation; and hard anodizing treatment is conducted on an inner hole machining part. The deep repairing method has the beneficial effects that cost is saved, and usability of original shells is improved.

Description

technical field [0001] The invention relates to the technical field of air cycle machines, and more specifically refers to a deep repair method for bearing housings of air cycle machines. Background technique [0002] The air cycle machine (PN: 2206400-1 / -2) is an important part of the refrigeration package of the B-737-600 / 700 / 800 / 900 aircraft air conditioning system, which is used to provide low-temperature air for the aircraft cabin and cockpit. [0003] Due to the parts 2206439-1 compressor housing and 2206442-1 bearing support housing in the 2206400 air cycle machine during use, the steel or titanium alloy rotor that rotates at a high speed (64000rpm) often damages the aluminum alloy when it fails. The bearing shell part of the compressor shell is the key part of the whole part, which plays a vital role in the use of the product, and the shell and bearing support components have a high price for new parts and a long order cycle; parts The repair manual (CMM) does not s...

AI Technical Summary

Problems solved by technology

[0003] Due to the parts 2206439-1 compressor housing and 2206442-1 bearing support housing in the 2206400 air cycle machine during use, the steel or titanium alloy rotor that rotates at a high speed (64000rpm) often damages the aluminum alloy when it fails. The bearing shell part of the compressor shell is the key part of the whole part, which plays a vital role in the use of the product, and the shell and bearing support components are expensive for new parts, and the order cycle is long; parts The Repair Manual (CMM) does not specify the repair method for this damage. Although the damaged part is small, because it is the mounting seat of the bearing and seal, the bearing or seal cannot be installed normally, and the entire shell can only be scrapped.

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