航空发动机转速传感器振动试验载荷确定及应用

航空发动机成品振动试验多数参考振动环境试验相关标准执行,没有真正意义上结合成品的振动特性与发动机实测振动环境确定振动试验载荷,导致成品内场试验潜在问题没有暴露出来,外场交付使用问题频发,严重影响发动机可靠性水平.以某型发动机转速传感器为研究对象,详细地阐述了转速传感器振动环境载荷确定的工作流程和方法,提出了基于疲劳次数的正弦振动试验方法并完成了产品的试验验证,发现了壳体裂纹、输出断路等故障,将改进后的产品进行回归验证,故障未再发生.基于实测数据制定的正弦振动试验方法,对转速传感器的结构完整性进行了验证,可为确定传感器类成品试验载荷和验证产品的可靠性水平提供新的方法.

Formulation and Application for Vibration Test Loading Spectrum of an Aeroengine Revolution Transmitter

Aeroengine accessory vibration was tested mostly according to correlative standards, in which the vibration test loads were not connected with vibration performance and vibration data of aeroengine, covering the potential problems in the test and frequently exposing in the external field that seriously influenced the level of aeroengine reliability. Take an aeroengine revolution transmitter as the object of the research, the process and method of confirming a revolution transmitter vibration environment loading was reported in detail. The sinusoidal vibration test method based on fatigue time was proposed and the product validation was demonstrated, finding out the faults including shell crack, wire turnoff. It worked well after regression testing. The structural integrity of the revolution transmitter was validated by the sinusoidal vibration test method based on measured data, in which a new method for confirming the test loading and validating reliability level of transmitter can be proposed.