可调式总压耙设计及应用

为了满足大、中涵道比发动机进气畸变测量中对总压耙的装配容差性和抗疲劳性要求,减小支杆与安装座的装配应力,设计了可调式总压耙。采用Workbench软件对可调式总压耙进行了静强度、动强度校核。结果显示:总压耙应力安全系数为11,挠度为0.051%,安全储备系数满足使用要求;在发动机工作频率范围内对可调式总压耙根部应力集中区进行动应力测量。结果表明:无共振和应力过载。总压耙振动测量数据符合强度校核试验标准,满足进气畸变使用需求。

Design and Application of an Adjustable Total Pressure Rake

In order to meet the requirements of assembly tolerance and fatigue resistance of total pressure rake and reduce the assembly stress of support rod and mounting seat in intake distortion measurement of large and medium bypass ratio engine,an adjustable total pressure rake was designed.The static and dynamic strength of the adjustable total pressure rake was checked by Workbench software.The results show that the safety factor of the total pressure rake stress is 11 and the deflection is 0.051%,and the safety reserve coefficient meets the operating requirements.Dynamic stress measurement of adjustable total rake root stress concentration was carried out in engine operating frequency range.The results show that no resonance and stress overload are existed.Total pressure rake vibration measurement data meet the strength check test standard and meet the operation requirements of intake distortion.