Flame tube repair method

A repair method and flame tube technology, applied in arc welding equipment, manufacturing tools, welding equipment and other directions, can solve problems such as waste of human, material and financial resources, and achieve the effect of saving costs, saving the cost of repeated adjustments, and avoiding scrapping

Inactive Publication Date: 2014-02-12
SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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Problems solved by technology

It is relatively rare for the drainage sleeve of the combustion hole on the head of the flame tube to open and fall off after the factory test run, and there is no record of the corresponding repair method. If it cannot be repaired, the head of the flame tube will be scrapped. After riveting and assembling the combustion chamber, re-conduct the temperature field test and repeat the test run, resulting in a lot of waste of manpower, material and financial resources

Method used

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Embodiment Construction

[0034] Such as Figure 1-Figure 3 As shown, the flame cylinder is one of the important hot end parts in the engine combustion chamber unit. The material of the flame cylinder is nickel-based deformed superalloy GH648, which is formed by vacuum induction melting. The inner surface is coated with heat-resistant coating B KⅡH-5, and the main composition of the coating is Ni, A1. When the combustion chamber is started and ignited, the predetermined combustion temperature (2000K ~ 2400K) is quickly reached in the flame tube. The flame tube is composed of a head (the head and the inner mixer are collectively referred to as the head), an outer mixer, and the outer mixer and the head are connected by 112 rivets. The head and the outer mixer segment are connected by 4 argon arc welding seams and 2 spot roll welding seams. There are 42 combustion-supporting hole drainage sleeves welded on the inner wall of the head, and 56 combustion-supporting hole drainage sleeves are welded on the ...

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Abstract

The invention discloses a flame tube repair method. Welding repair of a combustion-supporting hole guide sleeve in a component status is realized by an argon arc welding type welding repair process of a welding head. The welding method specifically comprises the following steps: polishing and cleaning before welding; washing and drying; welding by an argon arc welding process; manually welding a welding position of a gas feeding funnel by the argon arc welding process on an argon arc welding machine; inspecting after welding; testing for checking; inspecting and testing an engine by rule, wherein the performance of the engine is qualified. The method has the advantages as follows: the combustion-supporting hole guide sleeve at the head of a flame tube is subjected to integrated welding repair, so that the head of the flame tube is prevented from being scrapped, a new flame tube does not need to be replaced, the replacement cost of the new flame tube is reduced, and a new direction is provided for repairing the flame tube while considerable economic and social benefits are created.

Description

technical field [0001] The invention relates to engine repair technology, in particular to a method for repairing a flame tube. Background technique [0002] The main combustion chamber injects fuel into the main airflow after the compressor, organizes the fuel-air mixture for stable combustion under various working conditions, and generates a temperature field that meets the requirements of the turbine inlet. The combustion chamber has high working temperature, complicated load, and is also corroded by fuel and gas, and the working conditions are harsh. The common faults of the flame tube include cracks, carbon deposits, deformation, burns, etc. Due to the existence of residual stress in weld defects and heat-affected zones, cracks are also prone to initiation under the action of alternating vibration loads. Common failures of the flame tube, such as cracks, carbon deposits, deformation, burns, etc., are repaired by mature techniques. It is relatively rare for the drainag...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/167B23K9/235
CPCB23K9/04B23K9/167B23K9/235
Inventor 邓会霞任武王虎威
Owner SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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