军车发动机低压涡轮叶片裂纹失效检测系统设计

Military Vehicles Engine Low Pressure Turbine Blade Crack Failure Detection System Design[HS)]

摘要:

针对传统的军车发动机检测系统对于低压涡轮叶片裂纹失效检测的实时性和准确性较低的问题,设计了一款新的军车发动机低压涡轮叶片裂纹失效检测系统;该系统主要由叶片频率检测部分和叶片裂纹实验部分构成;硬件部分主要包括NI USB-9233、PCB加速度传感器、MA-600功放器、PYD-1型电涡流急诊疲劳试验器、以及PCB力锤等构成；软件部分主要针对叶片裂纹检测界面进行了设计,主要设计了检测系统的主界面、检测通道、检测信号模块和信号波形显示模块；最后进行实验,实验中对叶片上的20个测试点进行锤击,在进行通道参数设置的过程中,需要设置通道1作为力通道,通道2作为叶片裂纹信号响应通道；实验结果表明文中算法对叶片裂纹深度0.2 mm~2 mm的发动机低压涡轮叶片检测准确率达到98%,比传统算法提高32%,取得了令人满意的效果。

Abstract:

the low pressure turbine blade is the key to the military car engine parts.In view of the traditional military vehicles engine test system for low pressure turbine blade crack failure detection of real-time and accuracy problem of low,design of military vehicles engine low pressure turbine blade crack failure detection system.The system is mainly composed of blade frequency measuring experiment part and blade crack parts.Hardware part mainly include NI USB - 9233,PCB acceleration sensors,amplifiers,PYD MA - 600-1 type eddy current emergency force hammer fatigue tester,and PCB,etc;Software part mainly aimed at the blade crack detecting interface design,the main design of the detection system of the main interface,channel,detecting signal module and waveform display module. The last experiment,experiment of 20 test point on the blade hammer,on channel in the process of parameter Settings,you need to set up the channel 1 as a force,the channel 2 as blade crack signal response. The experimental results show that the algorithm of engine blade crack depth of 0.2 mm to 2 mm low pressure turbine blade detection accuracy reached 98%,32% higher than that of traditional algorithm,satisfactory results have been achieved.