涩老板在线免费视频_午夜成人精品_神马理论午夜,,_亚洲有薄码区久久欧美精品一区_97人人色_神马在线精品_成人熟女一区二区_亚洲二区三区四区_人妻午夜免费_大鸡巴猛男爆操骚逼国产一区二区_丁香婷婷久久一区二区三区_岛国内射美女_亚洲一级电影,亚洲欧美日韩国产最新版,亚洲五月综合缴情综合久久本,少妇色情喷水又紧又爽小说,巜上司的少妇的滋味,国产精品三级女人国产香蕉,亚洲最好的免费电影,欧美亚洲国产成人精品,国产永久一区二区三区,亚洲综合一区无码精品,歳の熟女セックス,内射带小孩熟妇,果冻传媒在线看免费视频观看,成人欧美一区二区三区片,亚洲 片内射欧美美妇,一本无码人妻在中文字幕免费,亚洲无毛视频,中文字幕丰满孑伦无码专区,亚洲爆乳无码专区色戒纶理,肉乳床欢无码片动漫软件,欧美日韩一区二区另类,久热只有精品在线直播,精品亚洲一区二区在线播放,精品国产乱码久久久久久影片,国产一级高清在线观看,国产精品福利在线一区,成人动漫下载,乱伦性爱视频,xo无码AV毛,国产黄A片免费网站免费,日韩欧美一级特黄特色大片

Today, I'd like to introduce to you how ventilation ducts reduce noise:

一.降低通風設備聲源噪聲

I Reduce the sound source noise of ventilation equipment

（1）合理選擇通風設備的機型。在噪聲控制要求高的場合，應選用低噪聲通風設備。不同型號的通風設備在同意的風量、風壓下、機翼型葉片的離心通風設備噪聲小，前向版型葉片的離心通風設備噪聲大。

(1) Reasonably select the type of ventilation equipment. Low noise ventilation equipment shall be selected for occasions with high noise control requirements. Under the agreed air volume and pressure of different types of ventilation equipment, the noise of centrifugal ventilation equipment with wing blade is small, and the noise of centrifugal ventilation equipment with forward plate blade is large.

（2）通風設備的工作點應接近效率高點。同一型號的通風設備效率越高，噪聲越小。

(2) The working point of ventilation equipment shall be close to the high efficiency point. The higher the efficiency of ventilation equipment of the same model, the lower the noise.

（3）在可能條件下適當降低通風設備的轉速。通風設備的旋轉噪聲與葉輪圓周速度10次方成比例，渦流噪聲與葉輪圓周速度6次方（或5次方）成比例。故降低轉速可降低噪聲。

(3) If possible, reduce the speed of ventilation equipment appropriately. The rotating noise of ventilation equipment is proportional to the 10th power of impeller circumferential speed, and the eddy current noise is proportional to the 6th power (or 5th power) of impeller circumferential speed. Therefore, reducing the speed can reduce the noise.

（4）通風設備進、出口的噪聲級是通風理、風壓曾加加大。因此，設計通風系統時，應盡量減少系統的壓力損失。當通風系統的總量和壓力損失較大時，可將其分為小系統。

(4) The noise level at the inlet and outlet of ventilation equipment is that the ventilation principle and wind pressure have increased. Therefore, when designing the ventilation system, the pressure loss of the system should be minimized. When the total amount and pressure loss of the ventilation system are large, it can be divided into small systems.

（5）氣流在管道內的流速不宜過高，以免引起再次產生噪聲。確定管道內氣流流速應根據不同要求按有關規定選取。

(5) The flow rate of air flow in the pipeline should not be too high to avoid generating noise again. To determine the air flow velocity in the pipeline, it shall be selected according to different requirements and relevant regulations.

（6）注意通風設備與電動機的傳動方式。采用直聯傳動的通風設備噪聲小，用聯軸器的次之，用沒有接縫的三角皮帶傳動的稍差。通風設備應配用低噪聲的電動機。

(6) Pay attention to the transmission mode of ventilation equipment and motor. The ventilation equipment driven by direct coupling has low noise, followed by coupling, and the one driven by V-belt without joint is slightly worse. Ventilation equipment shall be equipped with low-noise motor.

二.傳遞途徑上對通風設備噪聲減小

II Reduce the noise of ventilation equipment in the transmission way

（1）在通風設備的進、出風口上裝配恰當的消聲器。

(1) Install proper mufflers on the air inlets and outlets of ventilation equipment.

（2）通風設備設減振基座，進、出風口用軟管連接。

(2) The ventilation equipment is equipped with a damping base, and the air inlet and outlet are connected with hoses.

（3）對通風設備做隔聲處理。如設備通風設備隔聲罩；在通風設備機殼內襯只聲材料；將通風設備設置在專門的通風設備室內，并設置隔聲門、隔聲窗或設置其他吸聲設施，或在通風設備室內另設值班室等。

(3) Make sound insulation treatment for ventilation equipment. Such as ventilation equipment and sound insulation cover; Lining the enclosure of ventilation equipment with acoustic materials; Set the ventilation equipment in the special ventilation equipment room, and set sound insulation doors, sound insulation windows or other sound-absorbing facilities, or set another duty room in the ventilation equipment room.

（4）通風設備室的進、排氣通道采取聲措施。

(4) Acoustic measures shall be taken for the inlet and exhaust channels of the ventilation equipment room.

（5）將通風設備布置在遠離要求安靜的房間。

(5) Place ventilation away from rooms requiring quiet.

三.及時維護通風管道保養，定期檢維護，及時更換破損零部件，排除異常，以創造低噪聲運行條件。

III Timely maintain the ventilation duct, conduct regular inspection and maintenance, timely replace damaged parts and eliminate abnormalities, so as to create low-noise operation conditions.

以上就是為大家介紹的有關濟南通風管道的詳細介紹,希望對您有所幫助.如果您有什么疑問的話,歡迎聯系我們.我們將以的態度,為您提供服務http://www.okok0579.com

The above is the detailed introduction of Jinan ventilation duct. I hope it will be helpful to you If you have any questions, please contact us We will provide you with professional service http://www.okok0579.com