噪声与振动控制
譟聲與振動控製
조성여진동공제
NOISE AND VIBRATION CONTROL
2010年
2期
84-87
,共4页
振动与波%离心压缩机%失速%频谱%检测
振動與波%離心壓縮機%失速%頻譜%檢測
진동여파%리심압축궤%실속%빈보%검측
vibration and wave%centrifugal compressor%stall%spectrum%monitoring
针对福建龙岩某厂离心压缩机生产中旋转失速振动的实际故障,分析了旋转失速产生的机理,认为离心压缩机风量减小到一定程度时气流向着叶片工作面产生冲击,在叶片非工作面上产生很多气流涡旋,旋涡逐渐增多,使流道流通面积减小,旋涡组成的气团传播方向与叶轮旋转方向相反,并产生振动.总结旋转失速的类型与特征,提出一种基于快速傅里叶变换旋转失速信号检测方法,可以检测到失速先兆,并运用频谱分析法提出改进措施,经一年来的使用验证,该法简单、便捷、实用.
針對福建龍巖某廠離心壓縮機生產中鏇轉失速振動的實際故障,分析瞭鏇轉失速產生的機理,認為離心壓縮機風量減小到一定程度時氣流嚮著葉片工作麵產生遲擊,在葉片非工作麵上產生很多氣流渦鏇,鏇渦逐漸增多,使流道流通麵積減小,鏇渦組成的氣糰傳播方嚮與葉輪鏇轉方嚮相反,併產生振動.總結鏇轉失速的類型與特徵,提齣一種基于快速傅裏葉變換鏇轉失速信號檢測方法,可以檢測到失速先兆,併運用頻譜分析法提齣改進措施,經一年來的使用驗證,該法簡單、便捷、實用.
침대복건룡암모엄리심압축궤생산중선전실속진동적실제고장,분석료선전실속산생적궤리,인위리심압축궤풍량감소도일정정도시기류향착협편공작면산생충격,재협편비공작면상산생흔다기류와선,선와축점증다,사류도류통면적감소,선와조성적기단전파방향여협륜선전방향상반,병산생진동.총결선전실속적류형여특정,제출일충기우쾌속부리협변환선전실속신호검측방법,가이검측도실속선조,병운용빈보분석법제출개진조시,경일년래적사용험증,해법간단、편첩、실용.
The mechanism of rotation stall of compressors produced by a factory in Longyan of Fujian province is analyzed.It is found that the air flow impacts the working surface of the blade when the wind flow reduces, while many air vortexes occur in the back surface of the blade.Thus, the net sectional area of the air flow decreases.The air bubbles induced by the vortexes translate in the sense opposite to the rotation of the impeller and cause the vibration.Summing up the type and characteristics of the rotation stall of the compressor, a method for monitoring the rotation stall signal is put forward based on Fast Fourier Transform.With this method, the omen of rotation stall can be found.With spectrum analysis, some improvement measures are proposed.This method has been proved simple, convenient and practical in recent one-year application.
