基于修正GTN模型的高压水泵主轴断裂失效检测  

Research on Fracture Failure Detection of High Pressure Water Pump Spindle Based on Modified GTN Model

作　　者：梁倩[1] 李之达[2] 谢新[1] LIANG Qian;LI Zhida;XIE Xin(Department of Power generation Technology Training,Wuhan Electric Power Technical College,Wuhan 430079 China;School of Naval Architecture,Ocean and Energy Power Engineering,Wuhan University of Technology,Wuhan 430063 China)

机构地区：[1]武汉电力职业技术学院发电技术培训部,武汉430079 [2]武汉理工大学船海与能源动力工程学院,武汉430063

出　　处：《机械设计与研究》2024年第2期163-167,共5页Machine Design And Research

基　　金：国家自然科学基金面上项目(51779201)。

摘　　要：主轴断裂失效会导致高压水泵内部高压水喷出,可能引起事故,严重者甚至影响人身安全。高压水泵主轴处于水泵的内部,检测参数的选择和测量存在很大的不确定性,且最为判断特征的轴体振动信号中,强噪声会干扰阈值信号的判断,影响失效检测结果的准确性。提出一种基于修正GTN模型的高压水泵主轴断裂失效检测方法。利用速度传感器测定高压水泵主轴的振动信号,通过小波包分析对振动信号去噪处理,结合修正GTN模型,搭建基于故障树的高压水泵主轴断裂失效检测模型,对高压水泵的主轴断裂失效情况检测。实验测试结果表明:所提方法具有较低的误检率以及较高的查全率,能够有效提升检测效率。Shaft fracture failure can cause high-pressure water inside the high-pressure water pump to spray out,which may cause accidents and even affect personal safety.The main shaft of the high-pressure water pump is located inside the water pump,and there is considerable uncertainty in the selection and measurement of detection parameters.In the vibration signal of the shaft body,which is the most critical feature,strong noise can interfere with the judgment of the threshold signal,affecting the accuracy of failure detection results.This work proposes a high-pressure water pump spindle fracture failure detection method based on a modified CTN model.The speed sensor is used to measure the vibration signal of the main shaft of the high-pressure water pump,the wavelet packet analysis is used to denoise the vibration signal,and the modified GTN model is combined to build a fracture failure detection model of the main shaft based on the fault tree analysis to detect the fracture failure.The experimental test results show that the proposed method has a low false detection rate and a high recall rate,which can effectively improve detection efficiency.

关 键 词：修正GTN模型 高压水泵 主轴断裂 失效检测 小波包分析 

分 类 号：TG386.3[金属学及工艺—金属压力加工]