Method for changing inner mixer on flame barrel
A replacement method and mixer technology, applied in arc welding equipment, manufacturing tools, welding equipment, etc., can solve problems such as cracks, ablation, and quantity limitations on the wall of the flame tube, and achieve technical improvement, considerable economic benefits, and extended use The effect of longevity
Active Publication Date: 2012-05-02
SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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Problems solved by technology
Under the joint action of high temperature, high pressure, thermal shock, thermal corrosion, vibration and acoustic load, etc., the flame tube body will generate relatively large thermal stress locally; resulting in cracks, ablation, burning and other failures on the wall of the flame tube, Its failure rate is very high
In order to meet the needs of engine repair and use, our country spends a huge amount of money every year to purchase flame tube spare parts from Russia, and the quantity is still restricted by Russia, which brings great pressure to our production
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[0029] The flame cylinder of a certain overhaul machine is a short ring shape, and each section of the flame cylinder is processed by forging. The outer mixer of the flame cylinder and the head of the flame cylinder are riveted by rivets. Solder connection, the structure of which is as figure 1 shown. The structure of the flame tube is complex, and it is a large-diameter ring-shaped part. The original part has been in service for 500 to 1200 hours. After the part is in service, the size may be deformed to varying degrees.
[0030] A method for replacing a mixer in a flame cylinder, comprising the steps of:
[0031] Step 1: Use a scribe to mark the upper marking line on the cutting area of the head of the flame tube and the inner mixer, so that when welding the inner mixer, align it with the upper marking line for assembly;
[0032] Step 2: Cut the head of the flame tube on the laser cutting machine to ensure the size: 168±1mm;
[0033] Step 3: On the fixture, use the 7 br...
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The invention relates to a method for changing an inner mixer on a flame barrel, belonging to the technical field of the engine repair. The method comprises the following steps: marking upper mark lines in cutting areas of the head of the flame barrel and the inner mixer, and cutting the head of the flame barrel; measuring and recording the height of the head of the flame barrel; arranging the head of the flame barrel on a vertical lathe, and checking the jump of the fan-shaped section of the head of the flame barrel in a position which is 0-5mm far away from cutting lines; lathing the fan-shaped section of the head of the flame barrel until the fan-shaped section of the head of the flame barrel has the size of 163+ / -0.25mm, removing burrs, and rounding sharp edges; grinding the surface to be welded from the inner side and the outer side of the cutting position of the head of the flame barrel, placing the inner mixer to be changed on the head of the flame barrel, aligning the upper mark lines in the positions of the head of the flame barrel and the inner mixer, and fixing by using a clamping tool to ensure that the gaps among the end surfaces and the offset of the edges are not more than 0.3mm; carrying out positioned welding to the head of the flame barrel and the inner mixer; welding the inner mixer on the head of the flame barrel formally; grinding welding beadings on welding beams; and carrying out coloring inspection and X-ray inspection of the welding seams.
Description
technical field [0001] The invention belongs to the technical field of engine repair, in particular to a method for replacing a mixer in a flame cylinder. Background technique [0002] The flame tube is an important hot end part in the engine combustion chamber unit. Under the joint action of high temperature, high pressure, thermal shock, thermal corrosion, vibration and acoustic load, etc., the flame tube body will generate relatively large thermal stress locally; resulting in cracks, ablation, burning and other failures on the wall of the flame tube, Its failure rate is very high. In order to meet the needs of engine repair and use, our country spends a huge amount of money every year to purchase flame tube spare parts from Russia, and the quantity is still restricted by Russia, which brings great pressure to our production. At the same time, according to the statistics of the failures of multiple engines, the failure of the flame tube is mainly concentrated on the mixe...
Claims
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IPC IPC(8): B23P6/00B23K9/16
Inventor 李丹曹锋勇宋扬杨秀娟
Owner SHENYANG LIMING AERO-ENGINE GROUP CORPORATION