噪声与振动控制2017，Vol.37Issue(1)：178-182,5.DOI:10.3969/j.issn.1006-1335.2017.01.038
不同工况下离心风机振动变化规律试验研究
Experimental Study on the Vibration Variation Law of Centrifugal Fans in Variable Operation Conditions
摘要
Abstract
Abastraet:Influence of change of working conditions on the vibration characteristics of marine centrifugal fans is studied.With a centrifugal fan of a certain type as the object,a test bench which satisfies its working condition change and vibration measurement requirements is established.Firstly,the mechanism of the main excitation generation of the centrifugal fan and its characteristic frequency are analyzed.Then,the law of influence of the working condition change on the vibration characteristics is studied experimentally.It can be seen from the results of the analysis that the general variation tendencies of the measured fan's vibration values and the calculated values according to the empirical formulas are basically consistent.Thus,the relation formulas between the rotating speed and vibration characteristics and between the flow rate and the vibration characteristics are verified.It is noticeable that vibration and noise of the centrifugal fan are significantly affected by the flow-rate changing;especially its influence on the blade frequency is very large.The centrifugal fan has a best operation condition in which the fan's vibration and noise are the best.In the design process of the fan,the design working condition should be chosen near the best working condition.This work has some reference value for the design of marine fans.关键词
振动与波/离心风机/激励特性/转速/流量Key words
vibration and wave/centrifugal fan/excitation character/rotating speed/flow rate分类
数理科学引用本文复制引用
马振来,李国平,陈长盛,王强..不同工况下离心风机振动变化规律试验研究[J].噪声与振动控制,2017,37(1):178-182,5.基金项目
国家自然科学基金资助项目(51375248) （51375248）
中国工程物理研究院资助项目(B2-2015-0112) （B2-2015-0112）
