Three Dimensional Size Detection and Process Improvement of Fuel Nozzle for Aeroengine
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摘要: 燃油喷嘴的结构尺寸是影响其喷雾性能的重要因素，由于喷嘴结构复杂、体积小、尺寸精度要求高，传统的测量方法已经无法满足。采用X射线断层扫描复合式三坐标测量系统和Geometry Qualify三维造型软件对某型航空发动机燃油喷嘴展开三维尺寸测量，主要测量喷口-旋流器的内外部尺寸和分析副油路装配后的状态。经测量后发现喷口-旋流器内锥面尺寸超差严重，特别是内部喷口处外形尺寸失真；副油路装配后锥面还存在间隙。针对以上问题展开工艺改进工作，经工序集中和采用专用刀具后内锥面尺寸超差问题得到有效改善；通过手工研磨改善内锥面表面粗糙度和内锥面贴合不严的问题。Abstract: The structural size of the fuel nozzle is an important factor affecting its spray performance. Because of the complex structure, small volume and high dimensional accuracy of fuel nozzle, the conventional measurement methods can not meet. X-ray tomography and hybrid CMM (Coordinate Measuring Machine) and Geometry Qualify which is a three-dimensional modelling software were applied in the three-dimensional size detection of fuel nozzle for aeroengine. Firstly, the inner and outer dimensions of the nozzle-cyclone were measured. And then the state of the assembly of the sub-oil circuit was analyzed. After the measurement, it was found that the size of the inner cone surface of the nozzle-cyclone was seriously out of tolerance, especially the internal dimensions at the inner nozzle were distorted; there was also a gap between the cone surfaces after assembly of the sub-oil circuit. Aiming at the above problems, the process improvement work was carried out. After process centralization and the special tool had been adopted, the problem of over-dimension of the inner cone surface was effectively improved; the problem of surface roughness, lax fit of the inner cone surface was improved by manual grinding.
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Key words:
- aeroengine /
- fuel nozzle /
- three dimensional size detection /
- process improvement
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表 1 喷口-旋流器外形尺寸测量结果
图纸要求件号 1# 2# 3# 4# D1-0.035-0.010 合格 合格 合格 合格 
0.0055 0.0108 0.0154 0.0126 D3-0.120 合格 合格 合格 合格 
0.0112 0.0182 0.0176 0.0127 L5±0.025 合格 合格 合格 合格 A60+1° 合格 合格 合格 合格 
0.0123 0.0244 0.0288 0.0127 
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表 2 喷口-旋流器内部尺寸测量结果
图纸要求件号 1# 2# 3# 4# A10+10′ 超下差
1°20′41″超下差
1°37′39″超下差
1°43′44″超下差
1°31′16″
0.1127 0.1166 0.073 0.0389 A10+30′ 超上差
7°52′35″超上差
16°2′54″超上差
16°21′27″超上差
17°29′00″
0.0559 0.0407 0.0445 0.0447 L5±0.03 超上差
0.0075超下差
0.16超下差
0.17超下差
0.20L6±0.05 超上差
0.0045超上差
0.1129超上差
0.1585超上差
0.1202
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表 3 改进工艺前后的喷口-旋流器内部尺寸测量结果对比
图纸要求件号 1# 试刀件1# 试刀件2# A10+10′ 超下差
1°20′41″合格 合格 
0.1127 0.013 0.021 5 A30+30′ 超上差
7°52′35″合格 合格 
0.055 9 0.027 8 0.024 6 L5±0.03 超上差
0.0075合格 合格 L6±0.05 超上差
0.004 5合格 合格
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