噪声与振动控制
譟聲與振動控製
조성여진동공제
NOISE AND VIBRATION CONTROL
2013年
1期
119-122
,共4页
张浩%冯涛%刘碧龙%刘克
張浩%馮濤%劉碧龍%劉剋
장호%풍도%류벽룡%류극
声学%离心泵流噪声%实验研究%声压级差
聲學%離心泵流譟聲%實驗研究%聲壓級差
성학%리심빙류조성%실험연구%성압급차
acoustics%flow noise of centrifugal pump%experimental measurement%sound pressure level difference
搭建了离心泵流噪声测试系统,并对离心泵的流噪声进行实验研究.利用水听器测量了原型叶轮和四种改型叶轮在不同转速下的流噪声,发现水泵流噪声随着转速的增加而增加,随轮舌间隙的减小而增加.实验结果还表明,水泵下游的流噪声声压级要高于上游.观察水泵两端声压级差随转速以及叶轮半径的变化关系,并探讨其产生的原因.
搭建瞭離心泵流譟聲測試繫統,併對離心泵的流譟聲進行實驗研究.利用水聽器測量瞭原型葉輪和四種改型葉輪在不同轉速下的流譟聲,髮現水泵流譟聲隨著轉速的增加而增加,隨輪舌間隙的減小而增加.實驗結果還錶明,水泵下遊的流譟聲聲壓級要高于上遊.觀察水泵兩耑聲壓級差隨轉速以及葉輪半徑的變化關繫,併探討其產生的原因.
탑건료리심빙류조성측시계통,병대리심빙적류조성진행실험연구.이용수은기측량료원형협륜화사충개형협륜재불동전속하적류조성,발현수빙류조성수착전속적증가이증가,수륜설간극적감소이증가.실험결과환표명,수빙하유적류조성성압급요고우상유.관찰수빙량단성압급차수전속이급협륜반경적변화관계,병탐토기산생적원인.
An experimental system for measuring flow noise of a centrifugal pump was set up. The flow noise of the centrifugal pump with variable impeller radius at different rotary speeds was measured. The results show that the flow noise increases with the increasing of rotary speed and the decreasing of blade-tongue clearance. The sound pressure level of the downstream of the pump is higher than that of the upstream. The variations of the difference of the sound pressure level between the upstream and the downstream with different rotary speeds and impeller radii were observed and analyzed.