航空发动机中央锥齿轮声振特性试验研究

Experimental study on acoustic and vibration characteristics of central bevel gears of aero-engines

航空发动机锥齿轮声振特性的确定对于锥齿轮的研制具有重要意义。为研究航空发动机中央锥齿轮的声振特性,根据齿轮声振信息辨识原理,利用声导管技术在齿轮部件试验器中获取原始空气声。分析发现,啮合频率幅值的变化能够对齿轮行波共振特性实现完全表述,不仅可反映从动轮的声振特性,同时也能反映主动轮的声振特性,边频信息则反映了齿轮的故障信息。与应变片测量结果和设计计算结果对比分析证明,声学测试是获取齿轮声振特性的有效方法。

The determination of the acoustic and vibration characteristics of aero-engine bevel gears is of great significance for the development of bevel gears.In order to study the acoustic and vibration character⁃istics of the aero-engine central bevel gear,the original air sound was obtained in the gear component tester using the acoustic dust technology according to the principle of the gear acoustic information identification.Analysis results show that the variation of the meshing frequency amplitude can fully express the traveling wave resonance characteristics of the gear,which can not only reflect the acoustic and vibration characteris⁃tics of the driving wheel,but also reflect the acoustic and vibration characteristics of the driven wheel,while the side frequency information reflects the gear fault information.Compared with the measurement results of the strain gauges and the design calculations,the acoustics test is an effective method to obtain the acoustic vibration characteristics of the teeth.