新型结构元素的液压泵耦合故障分离方法研究  

Compound Fault Separation Method Study for Hydraulic Pump Based on a New Structure Element

作　　者：郭洋 丁凌杰 郑直 姜万录[4] GUO Yang;DING Lingjie;ZHENG Zhi;JIANG Wanlu(Qinggong College,North China University of Science and Technology,Tangshan Hebei 063000,China;College of Mechanical Engineering,North China University of Science and Technology,Tangshan Hebei 063210,China;HUIDA Sanitary Ware Co.,Ltd.,Tangshan Hebei 063000,China;School of Mechanical Engineering,Yanshan University,Qinhuangdao Hebei 066004,China)

机构地区：[1]华北理工大学轻工学院,河北唐山063000 [2]华北理工大学机械工程学院,河北唐山063210 [3]惠达卫浴股份有限公司,河北唐山063000 [4]燕山大学机械工程学院,河北秦皇岛066004

出　　处：《机床与液压》2021年第5期162-167,共6页Machine Tool & Hydraulics

基　　金：国家自然科学基金面上项目(51875498);华北理工大学轻工学院河北省一流本科专业建设重点支持项目;河北省博士后科学基金项目(B2020003033);华北理工大学博士科研启动基金项目(0088/28412499);河北省省属高等学校基本科研业务费研究项目(JQN20190004);唐山市应用基础研究计划项目(20130211b);河北省自然科学基金重点项目(E2018203339)。

摘　　要：具有相同谐波的滑靴磨损和斜盘磨损的形态特征信息相似性很高,因此很难有效分离其耦合故障。为解决此问题,提出一种基于梯型结构元素的新型数学形态学分离方法。采用不同长度梯型结构元素的形态差值算子分别提取2种故障特征信息,进而得到不同长度梯型结构元素对应的若干个分离信号;计算分离信号的2种不同故障的特征能量比。基于最大特征能量比,实现实测液压泵滑靴和斜盘磨损耦合故障信号的最优分离。The morphological feature information of the slipper wear fault and the swash plate wear fault with the same harmonics is in high similarity, so it is difficult to effectively separate the coupling fault. In order to solve the problem, a new mathematical morphological separation method based on ladder-shaped structure element was proposed. Two kinds of fault feature information were extracted by using morphological difference operators with different lengths of ladder-shaped structure element, and then several separated signals corresponding to different lengths ladder-shaped structure element were obtained;the feature energy ratio(FER) of the two different faults of the separated signals were calculated. Based on the maximum FER, coupling fault signals of the slipper wear fault and the swash plate wear fault of hydraulic pump can be separated in the best way.

关 键 词：液压泵 耦合故障分离 数学形态学 结构元素 特征能量比 

分 类 号：TH137[机械工程—机械制造及自动化] TP277[自动化与计算机技术—检测技术与自动化装置]