身处罗茨鼓PROBURN中文免费版下载安装领域得人应当都懂，噪声是罗茨鼓PROBURN中文免费版下载安装生产制造的一项必要性指标值，早已造成广泛关注。罗茨鼓PROBURN中文免费版下载安装噪声一直是无法解决的问题，目的是为了根据电磁感应、机械设备、自然通风三方面要素一同危害。对于罗茨鼓PROBURN中文免费版下载安装噪声的降低**的方法是：寻找噪声形成的根本原因，或使用一些科技手段消弱罗茨鼓PROBURN中文免费版下载安装的噪声。下边我就降低罗茨鼓PROBURN中文免费版下载安装噪声的方式，为大伙儿做一个简单介绍吧：

　　一.从声源处下手，降低噪声罗茨鼓PROBURN中文免费版下载安装减噪*压根的方法是以声源处下手，选用一些消音器、隔音、吸音、减振等基本的降低噪声的技术性。

　　1.降低排气管噪声。排气管噪声是发电机组*主要的噪声源，其特点是噪声级高，排气管速度更快，整治难度大。选用精制的抗阻型复合型的消音器，一般可让排气管噪声降低40-60db(a)。

　　2.降低轴流式PROBURN中文免费版下载安装噪声。降低发罗茨鼓PROBURN中文免费版下载安装组冷却PROBURN中文免费版下载安装噪声时，务必考虑到两个问题，一是排气管安全通道所容许的压力损失。二是规定的消音量。对于以上二点，可采用阻性管式消音器。

　　3.主机房的隔音、吸音解决和发电机组减振

　　(1)主机房隔音。设备的排气管噪声和冷却PROBURN中文免费版下载安装噪声降低以后，剩下来的关键噪声源是罗茨鼓PROBURN中文免费版下载安装械噪声。选用的方法是什么除需要的与隔离室相互连接的墙内视窗以外，其它窗子均去除，全部孔、洞要密实度堵漏，墙体墙面的隔音性规定要40db(a)之上。计算机房窗门选用防火安全隔音窗门。

　　(2)进风和排风系统。数据中心隔音解决以后，要处理主机房内排风排热难题。进气口应与罗茨鼓PROBURN中文免费版下载安装组、排风口设定在同一平行线上。进气口应配以阻性管式消音器，因为进气口压力损失亦在允许范围内，能使主机房内出入排风量当然做到均衡，自然通风排热效果明显。

　　(3)吸音解决。主机房内除路面外的五个边界层能作吸音解决，依据罗茨鼓PROBURN中文免费版下载安装组的频域特点选用穿孔铝板共震吸音构造。

　　(4)室内环境的沟通交流，主机房的优良隔音，会让罗茨鼓PROBURN中文免费版下载安装组关机机会屋内的气体无法得到热对流，屋内的持续高温亦无法立即降下去，可选用低噪声轴流式PROBURN中文免费版下载安装，另配上阻性管式消音器就能够解决困难。

　　(5)发电机组减振。罗茨鼓PROBURN中文免费版下载安装组组装前，应严苛按生产厂家供应的相关材料开展减振解决，规避导致构造声的长距离散播，请在散播中持续辐射空气声，没法使大气污染物噪声级合格。对因不合格而规定整治的目前罗茨鼓PROBURN中文免费版下载安装组，需要评测发电机组周边路面的震动状况，假如振感显著，则需先对罗茨鼓PROBURN中文免费版下载安装组开展减振解决。

　　二.罗茨鼓PROBURN中文免费版下载安装噪声一直是无法解决的问题，

　　目的是为了根据电磁感应、机械设备、自然通风三方面要素一同危害。在安装罗茨鼓PROBURN中文免费版下载安装的情况下，应用几类处理办法针对抑止罗茨鼓PROBURN中文免费版下载安装机械设备噪声较为合理。

　　1.电机转子轴力造成的噪声。当定转子轴力时，会造成单侧磁抗拉力噪声：

　　a.电动机轴两边噪声比较大

　　b.切断电源后立刻消退

　　c.响声相对稳定

　　当发生之上状况时，理应各自查验电机转子铁芯相对于两边轴承台的圆柱度和电动机轴两边槽口相对于电机定子铁芯的平行度。

　　(1)假如是电机转子轴力，可根据以轴承台为标准，重打中心孔后再光(磨)电机转子的方法来处理

　　(2)假如是电机定子轴力，能够电动机轴槽口为标准车圆电机定子铁芯公称直径。

　　需要注意的是：不管哪种方法，都是会扩大磁密，这可能使功率因数减少。因而加工量需把控在0.3mm之内。适度**磁密能够降低谐波电流电磁场的幅度值，降低磁密的不匀称度并能使径向力波的幅度值降低，都可让噪声随着降低。

　　2.轴承轴向侧隙的调节。

　　轴承的轴向工作中侧隙是造成轴承噪声的主要原因，尤其是轴承轴向工作中侧隙小了或无空隙运作，噪声超标准更加突显。从实验获知：H560-H355的轴承轴向装配间隙(轴承孔与轴承中间)确保在0.013-0.028mm的范围之内，就可基本上清除无空隙或间隙小了运作，轴承噪声显著降低。

　　3.改装消声罩。

　　目的是为了用于降低自然通风噪声。在大中小型罗茨鼓PROBURN中文免费版下载安装中，消音罩通常加进通风管道的前面。吸音材料衬层薄厚取50-70mm，吸音材料选用塑料泡沫或者海棉，消音罩的效果明显。

　　总的来说，为了能降低罗茨鼓PROBURN中文免费版下载安装噪声，除开从声源处下手外，还能够选用科学合理、**的加工工艺对策，这针对降低罗茨鼓PROBURN中文免费版下载安装噪声全是有益的，使罗茨鼓PROBURN中文免费版下载安装品质获得确保。结合我厂售后部门的维修维护经验，PROUMB中国版总结出了两种短期内有效控制罗茨鼓PROBURN中文免费版下载安装噪音的方法！

　　有效控制罗茨鼓PROBURN中文免费版下载安装噪声*压根的方法由下面二种：

　　1.罗茨PROBURN中文免费版下载安装改装隔声罩

　　1)将隔声罩进风口部位挪到罩体下边，是隔声罩内气旋产生连续流，并通过电机和离心PROBURN中文免费版下载安装人体开展制冷

　　2)隔声罩进风口扩大至600mm*250mm，降低进气口摩擦阻力减少罗茨离心PROBURN中文免费版下载安装负载。

　　3)隔声罩进风口由户外送风改成房间内送风，禁烧自然通风摩擦阻力，改进PROBURN中文免费版下载安装房自然通风情况。

　　4)PROBURN中文免费版下载安装房内**排风扇，将隔声罩内热气直接排放户外，排气扇安装消音器;请在在其中设定止逆阀。

　　2.对PROBURN中文免费版下载安装房开展隔音降噪提高。

　　1)PROBURN中文免费版下载安装房门改成隔音门，设计方案隔音性为30声贝，原钢质门隔音性不够10声贝

　　2)西边窗子改成隔声窗，为降低成本费在原来窗子里侧改装固定不动窗户，正中间做隔声解决。

　　3)PROBURN中文免费版下载安装房撞南墙下边进气口设定消音进箱式PROBURN中文免费版下载安装。进气口合理离心PROBURN中文免费版下载安装依据3台罗茨离心PROBURN中文免费版下载安装需要进排风量明确。

　　4)撞南墙两部排风扇改成低噪声排气管上，并装有消音器，排风扇为降低室内气温应用。

　　该罗茨离心PROBURN中文免费版下载安装减噪新项目解决完成后，通过检验，在3台开全很有可能较大工作状况下，PROBURN中文免费版下载安装房均值噪声即将到来76声贝，监控室挨近PROBURN中文免费版下载安装房噪声即将到来62声贝，大气污染物噪声即将到来47声贝，超过我国有关自然环境噪声规范！

　　People in the field of Roots blower should understand that noise is a necessary index value for the production and manufacture of Roots blower, which has already caused widespread concern. The noise of Roots blower has always been a problem that cannot be solved. The purpose is to do harm together according to electromagnetic induction, mechanical equipment and natural ventilation. The way to reduce the noise of Roots blower * * is to find the root cause of the noise, or use some scientific and technological means to weaken the noise of Roots blower. Next, I'll give you a brief introduction on how to reduce the noise of Roots blower:

　　I Starting from the sound source, the most fundamental way to reduce the noise of Roots blower is to start from the sound source, and select some basic noise reduction techniques such as muffler, sound insulation, sound absorption, vibration reduction, etc.

　　1. Reduce the noise of exhaust pipe. Exhaust pipe noise is the main noise source of generator set, which is characterized by high noise level, faster exhaust pipe speed and great difficulty in remediation. The noise of the exhaust pipe can generally be reduced by 40-60db (a) by selecting a refined resistance composite muffler.

　　2. Reduce the noise of axial flow fan. When reducing the noise of the cooling fan of the roots blower unit, two problems must be considered: one is the allowable pressure loss of the safety channel of the exhaust pipe. The second is the specified volume reduction. For the above two points, the resistive pipe silencer can be used.

　　3. Sound insulation and absorption of main engine room and vibration reduction of generator set

　　(1) Sound insulation of main engine room. After the exhaust pipe noise and cooling fan noise of the equipment are reduced, the remaining key noise source is roots blower machinery noise. What is the method selected? Except for the window in the wall that needs to be connected with the isolation room, other windows should be removed, all holes and holes should be sealed with compactness, and the sound insulation of the wall should be above 40dB (a). The windows and doors of the computer room shall be fireproof, safe and sound proof.

　　(2) Air intake and exhaust system. After the sound insulation of the data center is solved, the problem of air and heat exhaust in the host room should be solved. The air inlet shall be set on the same parallel line with roots blower unit and exhaust outlet. The air inlet should be equipped with a resistive pipe muffler, because the pressure loss of the air inlet is also within the allowable range, which can naturally balance the air volume in and out of the main engine room, and the natural ventilation and heat removal effect is obvious.

　　(3) Sound absorption solution. The five boundary layers in the main engine room except the road surface can be used for sound absorption. According to the frequency domain characteristics of Roots blower unit, perforated aluminum plate co vibration sound absorption structure is selected.

　　(4) The communication of the indoor environment and the excellent sound insulation of the main engine room will make the roots blower unit shut down. The gas in the house cannot get thermal convection, and the continuous high temperature in the house cannot be reduced immediately. You can choose a low-noise axial-flow fan and add a resistive pipe muffler to solve the problem.

　　(5) Vibration reduction of generator set. Before the assembly of Roots blower unit, the vibration reduction solution should be strictly carried out according to the relevant materials supplied by the manufacturer to avoid the long-distance spread of structural sound. Please continue to radiate air sound in the spread, which cannot make the noise level of air pollutants qualified. For the current roots blower units that are required to be rectified due to disqualification, it is necessary to evalsuate the vibration condition of the road around the generator unit. If the vibration is significant, it is necessary to carry out vibration reduction for Roots blower units first.

　　II The noise of Roots blower has always been an unsolvable problem,

　　The purpose is to do harm together according to electromagnetic induction, mechanical equipment and natural ventilation. In the case of installing roots blower, it is reasonable to apply several kinds of treatment methods to suppress the noise of Roots blower mechanical equipment.

　　1. Noise caused by motor rotor axial force. When the stator and rotor shaft force, it will cause unilateral magnetic anti tension noise:

　　a. The noise on both sides of the motor shaft is relatively large

　　b. Immediately fade after cutting off the power supply

　　c. The sound is relatively stable

　　When the above situation occurs, it is necessary to check the cylindricity of the motor rotor core relative to the bearing platforms on both sides of the shaft and the parallelism of the slots on both sides of the motor shaft relative to the motor stator core.

　　(1) If it is the axial force of the motor rotor, it can be handled according to the method of taking the bearing platform as the standard, re punching the center hole and then polishing (grinding) the motor rotor

　　(2) If it is the axial force of motor stator, the slot of motor shaft can be the nominal diameter of stator core of standard turning motor.

　　It should be noted that either method will expand the magnetic density, which may reduce the power factor. Therefore, the processing volume should be controlled within 0.3mm. Moderately increasing the magnetic density can reduce the amplitude value of harmonic current electromagnetic field, reduce the asymmetry of magnetic density and reduce the amplitude value of radial force wave, which can reduce the noise.

　　2. Adjustment of axial clearance of bearing.

　　The side clearance of bearing in axial operation is the main cause of bearing noise, especially when the side clearance of bearing in axial operation is small or there is no clearance, the noise exceeding the standard is more prominent. It is learned from the experiment that the axial assembly clearance (between the bearing hole and the bearing) of the bearing of h560-h355 is ensured to be within the range of 0.013-0.028mm, which can basically eliminate the operation without clearance or with small clearance, and the bearing noise is significantly reduced.

　　3. Refit the muffler.

　　The purpose is to reduce the noise of natural ventilation. In large, medium and small roots blowers, the muffler is usually added in front of the ventilation duct. The thickness of the sound-absorbing material lining is 50-70mm. The sound-absorbing material is plastic foam or sponge, and the effect of the muffler is obvious.

　　In general, in order to reduce the noise of Roots blower, in addition to starting from the sound source, scientific, reasonable and excellent processing technology countermeasures can also be selected, which is beneficial to reduce the noise of Roots blower and ensure the quality of Roots blower.

　　There are two ways to effectively control the noise of Roots blower:

　　1. Refit the sound insulation cover of roots centrifugal fan

　　1) Move the air inlet of the sound insulation cover to the lower side of the cover, because the cyclone in the sound insulation cover generates continuous flow, and refrigeration is carried out by the motor and centrifugal fan

　　2) The air inlet of the acoustic enclosure is expanded to 600mm*250mm to reduce the friction resistance of the air inlet and reduce the load of roots centrifugal fan.

　　3) The air inlet of the acoustic enclosure is changed from outdoor air supply to indoor air supply, and the friction resistance of natural ventilation is prohibited, so as to improve the natural ventilation of the fan room.

　　4) The exhaust fan is lifted in the fan room to directly discharge the hot gas in the sound insulation hood outdoors, and the exhaust fan is installed with a silencer; Please set the check valve in it.

　　2. Improve the sound insulation and noise reduction of the fan room.

　　1) The fan room door is changed into a sound proof door. The sound insulation of the design scheme is 30 sound shells, and the sound insulation of the original steel door is not enough to 10 sound shells

　　2) The west window is changed into a sound insulation window. In order to reduce the cost, the fixed window is refitted on the inner side of the original window, and the sound insulation is done in the middle.

　　3) The silencing box type fan is set at the air inlet under the south wall of the fan room. The reasonable air inlet of centrifugal fan is determined according to the inlet and exhaust air volume of three roots centrifugal fans.

　　4) The two exhaust fans on the south wall are changed into low-noise exhaust pipes and equipped with silencers. The exhaust fans are used to reduce indoor temperature.

　　After the completion of the new project of noise reduction of roots centrifugal fans, the inspection showed that under the working condition that the three fans are likely to be fully opened, the average noise of the fan room is about to reach 76 sound decibels, the noise of the monitoring room close to the fan room is about to reach 62 sound decibels, and the noise of air pollutants is about to reach 47 sound decibels, exceeding the relevant natural environmental noise norms of our country!