某型涡桨发动机减速器整机振动监控阀值研究

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振动与冲击 ›› 2015, Vol. 34 ›› Issue (18) : 136-141.

论文

程礼1,2，屈轲1，陈卫1，尚柏林1，高君宇1

作者信息 +

Research on vibration monitoring threshold of turboprop engine reducer

CHENG Li1,2，QU Ke1，CHEN Wei1, SHANG Baolin1,GAO Junyu1

Author information +

文章历史 +

摘要

针对某型涡桨发动机在不分解的前提下对齿轮毂进行故障诊断的要求，设计搭建了整机振动测试系统，利用该测试系统在厂内台架和外场飞机上完成了18台次整机振动测试。特别是专门定制了一台模拟故障的发动机减速器并完成了2台次试验。针对实际故障特点，采用了两种分析信号数据的方法，根据3σ准则确定了监控阀值。根据IIR数字滤波器原理，对实测信号进行了特征频带提取与对比分析，确定了一级齿轮毂内齿端啮合频率（1736Hz）、外齿端啮合频率（6458.5Hz）为特征频率，研究确定了特征频带监控阀值。并根据Hilbert解调定理对减速器振动信号进行解调，对比分析了调制信号幅值，针对在发动机不同状态下有明显差别的的游星架转频四倍频（71.7Hz）计算其解调特征监控阀值。

Abstract

In order to meet the requirements undertaking the gear hub fault diagnosis of a turboprop aero-engine without decomposition, a complete machine vibration test system was designed and built. 18 times of complete machine vibration test were accomplished on the factory bench and out-field aircrafts using the system, 2 times of tests were applied based on a specially ordered aero-engine reducer with simulating fault. Aiming at real characteristics of the fault, used two methods to analyze signal date, and confirmed monitoring threshold value based on . Based on IIR digital filter theory, characteristic sub-band extraction and comparative analysis of measured signal were made, the first level gear tooth meshing frequency in gear hub（1736Hz）、the gear tooth meshing frequency（6458.5Hz） are defined as the feature frequency and the threshold value of the characteristic sub-band was identified. According to the Hilbert demodulation theorem, the vibration signal of reducer was demodulated, the modulated signal amplitude was analyzed comparatively and the threshold value of demodulated characteristic monitoring was confirmed. The demodulation characteristic monitoring threshold is calculated according to planetary gear four times the frequency（71.7Hz）under different condition of the engine.

导出引用

程礼1,2，屈轲1，陈卫1，尚柏林1，高君宇1. 某型涡桨发动机减速器整机振动监控阀值研究[J]. 振动与冲击, 2015, 34(18): 136-141

CHENG Li1,2，QU Ke1，CHEN Wei1, SHANG Baolin1,GAO Junyu1. Research on vibration monitoring threshold of turboprop engine reducer[J]. Journal of Vibration and Shock, 2015, 34(18): 136-141

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