航发燃油喷嘴旋流器的加工工艺及测量方法改进

Improvement of Processing Technology and Measurement Method for Aero Engine Swirler of Fuel Nozzle

针对某型号航空发动机燃油喷嘴的加工工艺及测量方法改进问题,分析了燃油喷嘴精密零件旋流器的加工工艺与测量方法的改进。通过改进加工工艺,采用车削中心一次装夹完成零件外型及旋流槽的加工,重新设计加工刀具,提高零件的加工精度,有效解决了喷嘴组件的燃油喷雾角度偏离设计值的问题;通过尺寸换算,改变测量尺寸,以测量槽的进出口长度尺寸来代替槽深尺寸,解决了旋流槽深度尺寸测量失真问题;通过对不同设计尺寸特性的零件在不同燃油压力下流量试验的数据分析,优化选择,确定了燃油流量值满足设计期望的喷嘴零件设计特性,解决喷嘴燃油流量偏小及高低压燃油流量不同步问题,对燃油喷嘴的改进提供了重要依据。

To improving the processing technology and measurement method of a certain type of aero-engine fuel nozzle, the improvement of the processing technology and measurement method of the fuel nozzle precision part swirler is analyzed in this paper. By improving the processing technology and adopting the turning center to complete the machining process of the parts shape and the spiral chute at a time, the processing cutting tool is redesigned to improve the processing precision of the parts, and the deviation problem of fuel spray nozzle angle from the designed value of the nozzle components is effectively solved;Through the dimension conversion, the measurement size is changed to measure the inlet and outlet length of the tank instead of the depth of the slot, and the distortion of the depth dimension of the swirl groove is solved. Through the data analysis and optimized selection of the flow tests to the parts with different design sizes and characteristics under different fuel pressure, design features of the nozzle parts whose fuel flow rate value could satisfy the design expectation are determined, so as to solve the problems such as the nozzle fuel flow is small, and the high and low pressure fuel flow is out of sync, etc. This paper provides an important basis for the improvement of fuel nozzle.