羅茨風(fēng)機開機噪音破80分貝，如何降噪緩解

作者：超級管理員
發(fā)布時間：2022-05-26
點擊：2157

　　根據(jù)安全衛(wèi)生管理局(OSHA)規(guī)定，人耳**可以承受連續(xù)8小時85分貝的聲音強度，而無負面影響。125分貝的聲音，已經(jīng)會讓人感到頭痛。在正常狀態(tài)下，人類能夠忍受的聲音約為160分貝。一旦聽到的聲音超過這個數(shù)字，有些人的耳膜可能會因此破裂。聲音過大會對人的內(nèi)部器官造成損傷。試驗表明, 噪聲超過115分貝( 如飛機發(fā)動時) 大腦皮層的功能便嚴重衰退, 達到165分貝時動物死亡, 人類的承受力不能超過175分貝。而羅茨鼓風(fēng)機如果沒有進行消音降噪，其原始噪音一般在100-120分貝之間。這個噪音已經(jīng)明顯危及到了人體健康!為此，小編整理了一下幾種羅茨風(fēng)機降噪方法分享給大家!

　　羅茨風(fēng)機噪音來源：

　　[1]徐國強. (2014). 探討如何降低羅茨鼓風(fēng)機噪音的設(shè)計. 城市建設(shè)理論研究:電子版.期刊中介紹機械噪聲主要來源于機殼的振動，使機殼發(fā)生振動的原因主要有兩個:

　　①葉輪的轉(zhuǎn)動不平衡力,通過傳動構(gòu)件轉(zhuǎn)移到機殼上,對機殼產(chǎn)生周期性的激勵;

　?、跈C殼內(nèi)的渦流強度所決定的壓力脈動,常與葉片的基頻(即葉片通過頻率)有聯(lián)系,也對機殼產(chǎn)生周期性的激勵。

　　風(fēng)機的風(fēng)壓越高,這一激勵源越不能忽視。噪聲測量測量羅茨風(fēng)機噪聲的目的就是為了對被測對象進行噪聲等級的分析、評價或聲源識別,以便采取適當(dāng)?shù)拇胧┻M行噪聲控制。

　　通常羅茨風(fēng)機的噪聲識別方法有現(xiàn)場測量法、聲功率測量法、表面振動測量法等,其中,現(xiàn)場測量法是工程實際中常用的方法。

　　現(xiàn)場測量法通過對數(shù)據(jù)、頻譜的分析確定主要的噪聲輻射源,方法簡便,測量結(jié)果能真實反映風(fēng)機的振動與噪聲水平,但易受環(huán)境的影響。聲功率測量法反映噪聲源輻射強度與輻射特性,避免了聲壓級易受測量距離和測量環(huán)境影響的缺點。

　　振動測量法是根據(jù)羅茨風(fēng)機的表面振動速度來估計表面輻射聲功率,主要困難在于羅茨風(fēng)機零部件輻射比的確定,需要測量較多的數(shù)據(jù)和進行大量的計算。

羅茨風(fēng)機降噪

羅茨風(fēng)機降噪設(shè)備隔音房

　　閱讀完了徐國強. (2014). 探討如何降低羅茨鼓風(fēng)機噪音的設(shè)計.文章后，我又咨詢了一下我們廠的技術(shù)研發(fā)人員。從而得知，羅茨風(fēng)機出廠設(shè)及參數(shù)的精度是羅茨風(fēng)機噪音來源之一。如果不考慮更換羅茨風(fēng)機，可以采用以下方式進行羅茨風(fēng)機降噪!

　　1.加裝或更換羅茨風(fēng)機消音器;

　　2.加裝羅茨風(fēng)機隔音房;

　　3.如果羅茨風(fēng)機噪音高于120分貝，需要停機及時排查風(fēng)機是否有葉輪偏磨現(xiàn)象，并及時修復(fù);

　　4.管道亂流噪音，空氣在流動時，若碰到尖銳的障礙物，極易發(fā)生亂流。此亂流雖然與渦流的情況不同，同樣會產(chǎn)生噪音，或頻率甚高的嘯音，對風(fēng)機而言亦會造成效率損失。因此，要及時排查管道，必要時加裝隔音棉進行降噪!

　　相信大家通過以上方法可以及時處理羅茨風(fēng)機噪音問題了，如果您在生產(chǎn)環(huán)境中遇到了無法解決的問題，也可以聯(lián)系我們廠定制羅茨風(fēng)機降噪方案!

　　友情提示：若羅茨風(fēng)機噪音低于80分貝，屬于正常的工業(yè)設(shè)備噪音范圍。想進一步降低風(fēng)機噪音，請及時加裝羅茨風(fēng)機隔音房哦!

　　How to reduce the noise of Roots blower when it is started up to 80 dB

　　According to the regulations of the safety and Health Administration (OSHA), the human ear can withstand a maximum sound intensity of 85 dB for 8 hours without negative effects. The sound of 125 decibels will already make people feel headache. Under normal conditions, human beings can tolerate about 160 decibels of sound. Once you hear more than this number, some people's eardrums may rupture. Excessive sound will cause damage to people's internal organs. Experiments show that when the noise exceeds 115 dB (e.g. when the aircraft starts), the function of cerebral cortex will decline seriously. When it reaches 165 dB, animals die, and human endurance can not exceed 175 dB. If the roots blower is not silenced, its original noise is generally between 100-120 dB. This noise has obviously endangered human health! To this end, Xiaobian sorted out several noise reduction methods of Roots blower and shared them with you!

　　Noise source of Roots blower:

　　[1] Xu Guoqiang (2014). This paper discusses the design of how to reduce the noise of Roots blower Theoretical research on Urban Construction: electronic version According to the journal, the mechanical noise mainly comes from the vibration of the casing. There are two main reasons for the vibration of the casing:

　?、?The rotating unbalanced force of the impeller is transferred to the casing through the transmission member to generate periodic excitation to the casing;

　?、?The pressure pulsation determined by the eddy current intensity in the casing is often related to the fundamental frequency of the blade (i.e. blade passing frequency), and also generates periodic excitation to the casing.

　　The higher the wind pressure of the fan, the more this excitation source can not be ignored. Noise measurement the purpose of measuring the noise of Roots blower is to analyze and evaluate the noise level of the measured object or identify the sound source, so as to take appropriate measures to control the noise.

　　Generally, the noise identification methods of Roots blower include on-site measurement method, sound power measurement method, surface vibration measurement method, etc. among them, on-site measurement method is a common method in engineering practice.

　　The on-site measurement method determines the main noise radiation source through the analysis of data and spectrum. The method is simple, and the measurement results can truly reflect the vibration and noise level of the fan, but it is easy to be affected by the environment. The sound power measurement method reflects the radiation intensity and radiation characteristics of noise source, and avoids the disadvantage that the sound pressure level is easily affected by the measurement distance and measurement environment.

　　The vibration measurement method estimates the surface radiated sound power according to the surface vibration speed of Roots blower. The main difficulty lies in the determination of the radiation ratio of Roots blower parts, which requires more data measurement and a lot of calculation.

　　After reading Xu Guoqiang (2014). This paper discusses the design of how to reduce the noise of Roots blower After the article, I consulted the technical R & D personnel of our factory. Therefore, the factory setting and parameter accuracy of Roots blower is one of the noise sources of Roots blower. If the replacement of Roots blower is not considered, the following methods can be adopted to reduce the noise of Roots blower!

　　1. Install or replace roots blower silencer;

　　2. Install roots blower sound insulation room;

　　3. If the noise of Roots blower is higher than 120 dB, it is necessary to shut down the blower, check whether there is eccentric wear of impeller in time, and repair it in time;

　　4. Pipe turbulence noise. When air flows, it is very easy to have turbulence if it encounters sharp obstacles. Although this turbulence is different from the vortex, it will also produce noise or high-frequency whistling, which will also cause efficiency loss to the fan. Therefore, it is necessary to check the pipeline in time and install sound insulation cotton for noise reduction if necessary!

　　I believe you can deal with the noise problem of Roots blower in time through the above methods. If you encounter problems that cannot be solved in the production environment, you can also contact our factory to customize the noise reduction scheme of Roots blower!

　　Friendly tip: if the noise of Roots blower is lower than 80 dB, it belongs to the normal noise range of industrial equipment. If you want to further reduce the fan noise, please install Roots fan sound insulation room in time!