CAJ | 학술논문

叶片式流体机械在整个重工业体系中有着重要作用,其叶片疲劳失效易造成巨大损失.研究表明,流体激振产生的自激振动是叶片疲劳破坏的主要原因.本文重点以实际工况中离心式压缩机为例进行研究,分别就组成自激振动的旋转失速、喘振、声共振以及颤振的破坏机理进行具体分析,分析了针对叶片裂纹的状态监测和故障特征提取方法的当前研究现状.指出当前国内对于叶轮机械疲劳失效的在线监测还属于起步阶段,亟待加以深入研究.
협편식류체궤계재정개중공업체계중유착중요작용,기협편피로실효역조성거대손실.연구표명,류체격진산생적자격진동시협편피로파배적주요원인.본문중점이실제공황중리심식압축궤위례진행연구,분별취조성자격진동적선전실속、천진、성공진이급전진적파배궤리진행구체분석,분석료침대협편렬문적상태감측화고장특정제취방법적당전연구현상.지출당전국내대우협륜궤계피로실효적재선감측환속우기보계단,극대가이심입연구.
Turbo machinery plays an important role in the whole system of heavy industry and the fatigue failure of blades would often lead to huge economic losses.The research shows self-excited vibration caused by fluid induced vibration is the main reason for blade fatigue failure.In this paper,take the centrifugal compressor which is in actual working condition as an example,analyzing the destruction mechanism for self-excited vibration which includes rotating stall,surge,acoustic resonance and shimmy.Meanwhile,the current research status for state monitoring and fault feature extraction method of blade cracking is studied.Points out that the current domestic on-line monitoring for impeller mechanical fatigue failure is in early stage,and it needs further study.