羅茨鼓風(fēng)機(jī)一般采用電機(jī)為動(dòng)力源(也有部分以柴油機(jī)為動(dòng)力源)，電機(jī)是羅茨風(fēng)機(jī)必不可少的配套設(shè)備，電機(jī)正常工作，羅茨鼓風(fēng)機(jī)才能正常工作，電機(jī)作為羅茨風(fēng)機(jī)的動(dòng)力源，如果電機(jī)燒壞(燒毀)就意味著風(fēng)機(jī)失去了動(dòng)力，會(huì)停止工作，電機(jī)燒壞的原因有很多，常見羅茨風(fēng)機(jī)燒電機(jī)的原因有以下幾點(diǎn)。

　　一、電機(jī)缺相運(yùn)行

　　這是個(gè)三相異步電機(jī)的殺手，電機(jī)正常運(yùn)行時(shí)三相負(fù)載為對(duì)稱負(fù)載，因此 三相電流基本保持平衡，大小相等，如果運(yùn)行中電機(jī)缺相(三相繞組中任一相斷開的現(xiàn)象叫缺相)，風(fēng)機(jī)振動(dòng)將會(huì)變大、出現(xiàn)異常聲音、轉(zhuǎn)速下降、電流增加，電機(jī)溫度將會(huì)急劇升高， 從而導(dǎo)致電機(jī)燒壞，質(zhì)量一般的電機(jī)*多十幾分鐘就會(huì)燒壞。*可怕的是整個(gè)供電系統(tǒng)的缺 相，再加上很多設(shè)備的開關(guān)是自鎖的或自動(dòng)開啟的(如風(fēng)機(jī)、水泵)，一次停電后的再送電缺相事故，可能一下燒十幾個(gè)電機(jī)。

　　電機(jī)受到外在侵害導(dǎo)致燒毀壞比如，電機(jī)缺相運(yùn)行、風(fēng)機(jī)振動(dòng)造成接線柱松脫相間短路;配電柜或電機(jī)進(jìn)水或受潮造成絕緣降低;設(shè)備電線老化;灰塵介入太多;工作電壓不對(duì)，電壓持續(xù)過(guò)高或者過(guò)低，這些情況都會(huì)影響羅茨風(fēng)機(jī)電機(jī)的正常工作，羅茨風(fēng)機(jī)工作時(shí)，電機(jī)溫度急劇升高，導(dǎo)致電機(jī)燒毀，質(zhì)量一般的電機(jī)可能在十幾分鐘內(nèi)被燒毀，更可怕的是供電系統(tǒng)缺相，很多風(fēng)機(jī)的開關(guān)是自鎖的或自動(dòng)開啟的，一次停電后的再送電缺相事故，可能一下會(huì)燒壞多臺(tái)電機(jī)。所以，羅茨風(fēng)機(jī)在使用前，注意檢查各項(xiàng)指標(biāo)正常后再啟動(dòng)，可以減少故障。

　　二、軸承損壞。

　　由于長(zhǎng)時(shí)間不間斷的讓羅茨風(fēng)機(jī)運(yùn)行致使由于電機(jī)本體運(yùn)行溫升過(guò)高，且軸承補(bǔ)充加油脂不及時(shí)造成軸承缺油直至軸承損壞、會(huì)出現(xiàn)軸彎曲、皮帶斷裂等現(xiàn)象，致使定、 轉(zhuǎn)子摩擦(俗稱掃膛)引起鐵心溫度急劇上升，燒毀槽絕緣、匝間絕緣，從面造成繞組匝間 短路或?qū)Φ亍胺排凇薄?yán)重時(shí)會(huì)使定子鐵心倒槽、錯(cuò)位、轉(zhuǎn)軸磨損、端蓋報(bào)廢等。軸承損壞一般還有下列原因造成：

　　1、軸承裝配不當(dāng)，如冷裝時(shí)不均勻敲擊軸承內(nèi)圈使軸受到磨損，導(dǎo)致 軸承內(nèi)圈與外圈配合失去過(guò)盈量或過(guò)盈量變小，出現(xiàn)跑內(nèi)圈現(xiàn)象，裝電機(jī)端蓋時(shí)不均勻敲擊， 導(dǎo)致端蓋軸承室與軸外圈配合過(guò)松出現(xiàn)跑外圈現(xiàn)象。無(wú)論跑內(nèi)圈還是跑跑外圈均會(huì)引起軸承 運(yùn)行溫升急劇上升，只要軸承完好，允許間斷性跑外圈現(xiàn)象存在。

　　2、軸承承墻內(nèi)未清洗干凈，或加油脂不干凈。例如軸承保持微小鋼性物質(zhì)為徹底清理干凈，運(yùn)行是軸承滾到受損引起溫 升過(guò)高燒毀軸承。

　　3、軸承重新更換加工，電機(jī)端蓋嵌套后過(guò)盈量大或橢圓度超標(biāo)引起軸承滾珠游隙過(guò)小或不均勻?qū)е螺S承運(yùn)行時(shí)摩擦力增加，溫度急劇上升直至燒毀。

　　4、由于定、轉(zhuǎn)子鐵心軸向錯(cuò)位或重新對(duì)轉(zhuǎn)軸機(jī)加工后精度不夠，致使軸承內(nèi)、外圈不在一個(gè)切面上而引起軸承運(yùn)行“吃別勁”后溫升高直至燒毀。

　　5、由于不同型號(hào)的油脂混用造成軸承損壞。

　　6、軸承本 身存在質(zhì)量問(wèn)題，例如滾道銹斑、轉(zhuǎn)動(dòng)不靈活、游隙過(guò)小、保持架變形等。

　　7、備用機(jī)長(zhǎng)期不運(yùn)行，油脂變質(zhì)，軸承生銹而唯有對(duì)其保養(yǎng)和維護(hù)只能使用中注意定期檢查和定期更換相同品牌油脂。

　　三、風(fēng)閥關(guān)閉或堵塞的情況下啟動(dòng)會(huì)造成過(guò)載燒毀

　　由于羅茨風(fēng)機(jī)啟動(dòng)后風(fēng)閥未有打開或打開的量不夠。而羅茨風(fēng)機(jī)在此情況運(yùn)行下，致使由于電機(jī)本體運(yùn)行溫度急劇上升直至燒毀。風(fēng)口或風(fēng)閥復(fù)位后，而羅茨風(fēng)機(jī)未及時(shí)關(guān)閉，而羅茨風(fēng)機(jī)在此情況運(yùn)行下，也會(huì)致使由于電機(jī)本體運(yùn)行溫度急劇上升直至燒毀。

　　羅茨鼓風(fēng)機(jī)啟動(dòng)時(shí)受阻較大，則電機(jī)電流值超過(guò)規(guī)定電流值，造成電機(jī)過(guò)熱，持續(xù)時(shí)間較長(zhǎng)會(huì)造成繞組燒毀。所以，羅茨風(fēng)機(jī)啟動(dòng)時(shí)要空載啟動(dòng)，先打開所有主路、旁路閥門，使羅茨風(fēng)機(jī)空壓?jiǎn)?dòng)，待風(fēng)機(jī)空載正常運(yùn)轉(zhuǎn)數(shù)分鐘后，再關(guān)閉閥門，一般情況下，為了保護(hù)電機(jī)還會(huì)配備降壓?jiǎn)?dòng)柜。還有，當(dāng)主路或者旁路風(fēng)口或閥門關(guān)閉后，而羅茨風(fēng)機(jī)未及時(shí)關(guān)閉，而風(fēng)機(jī)在此情況下運(yùn)行，也會(huì)導(dǎo)致電機(jī)運(yùn)行溫度急劇上升、燒毀。除了羅茨風(fēng)機(jī)啟動(dòng)或關(guān)閉時(shí)阻力較大，還有其他諸如管道系統(tǒng)實(shí)際壓力超過(guò)銘牌壓力值，比如，風(fēng)機(jī)管路有異物進(jìn)入沒有及時(shí)排除，也可能會(huì)造成燒壞電機(jī)，所以，需要經(jīng)常觀察壓力表是否正常，經(jīng)常觀察并清理管路異物，保持暢通。

　　羅茨鼓風(fēng)機(jī)銘牌上標(biāo)注了風(fēng)機(jī)升壓值，表示羅茨鼓風(fēng)機(jī)在此電機(jī)功率下所能承受的阻力。羅茨風(fēng)機(jī)吸入氣流，經(jīng)過(guò)轉(zhuǎn)子的強(qiáng)制推動(dòng)后氣流升壓，輸出系統(tǒng)。當(dāng)系統(tǒng)阻力遠(yuǎn)超設(shè)備的升壓值時(shí)，會(huì)出現(xiàn)動(dòng)力不夠，當(dāng)阻力大于升壓值時(shí)，電機(jī)輸出的功欠缺，剛開始會(huì)表現(xiàn)為電機(jī)發(fā)熱，繼續(xù)使用線圈將被燒斷，電機(jī)被燒毀。如果屬于風(fēng)機(jī)選型錯(cuò)誤，則需要重新選型，所以，選擇適當(dāng)?shù)臋C(jī)型，匹配合適功率的電機(jī)非常重要。當(dāng)風(fēng)機(jī)管路堵塞時(shí)，也會(huì)出現(xiàn)阻力超過(guò)規(guī)定升壓值，需要全面清理風(fēng)機(jī)管路，比如，止回閥裝反，會(huì)瞬間增大羅茨風(fēng)機(jī)的阻力，導(dǎo)致電機(jī)燒壞，這都是較常見的電機(jī)燒毀原因。

　　四、受潮與高溫

　　因?yàn)榕潆姽窕螂姍C(jī)進(jìn)水或受潮造成的絕緣降低，也是常見的損壞原因，但是沒有辦法作防護(hù)。只能使用中注意和定期搖絕緣。在電機(jī)沒爆以前，烘干、重新浸漆可解決。尤其是用變頻器驅(qū)動(dòng)的電機(jī)，更要小心此項(xiàng)，不然可能連變頻器一塊報(bào)銷。

　　羅茨風(fēng)機(jī)運(yùn)行溫度過(guò)高，比如，風(fēng)機(jī)房溫度過(guò)高這個(gè)原因常被忽視，一般情況下，環(huán)境溫度較低時(shí)，羅茨風(fēng)機(jī)可使用順利，可到了夏天高溫季節(jié)，風(fēng)機(jī)房?jī)?nèi)溫度過(guò)高，加上風(fēng)機(jī)運(yùn)轉(zhuǎn)產(chǎn)生的熱量不能及時(shí)有效散熱，空氣經(jīng)過(guò)羅茨風(fēng)機(jī)的不斷吸入、升壓，使得機(jī)房?jī)?nèi)溫度不斷升高，當(dāng)羅茨風(fēng)機(jī)溫度過(guò)高，會(huì)導(dǎo)致各種情況的發(fā)生，比如，齒輪箱潤(rùn)滑油失效，齒輪摩擦力增大，帶連傳動(dòng)皮帶出現(xiàn)問(wèn)題，直連傳動(dòng)聯(lián)軸器出現(xiàn)故障等，這些都可能引發(fā)羅茨風(fēng)機(jī)并發(fā)問(wèn)題，造成電機(jī)燒毀。所以，風(fēng)機(jī)房需要有效隔音的同時(shí)，也要確保風(fēng)機(jī)房的通風(fēng)換氣，有效散熱，達(dá)到降溫的目的，較少故障。

　　五、其它

　　另外還有的不是很常見的原因：如電壓過(guò)低或過(guò)高，超載、震動(dòng)造成接線柱松脫相間短路，蟲鼠危害、進(jìn)口電機(jī)電壓與國(guó)內(nèi)電壓不配合(如日本電機(jī))、電機(jī)質(zhì)量。羅茨風(fēng)機(jī)電機(jī)的本身如果存在質(zhì)量問(wèn)題，也會(huì)造成電機(jī)故障，而電機(jī)的一般損壞形式是燒毀。電機(jī)的品質(zhì)有好有壞，質(zhì)量好的電機(jī)耐用，壽命會(huì)長(zhǎng)久，質(zhì)量低的則使用壽命則短，容易出故障。所以，選擇羅茨風(fēng)機(jī)不能一味追求低價(jià)，貨比三家，慎重選擇。各種減壓起動(dòng)回路故障造成不轉(zhuǎn)換，電機(jī)長(zhǎng)時(shí)間低壓工作等等。在使用前注意預(yù)先檢查各項(xiàng)指標(biāo)后在啟動(dòng)，可以減小事故率。

　　羅茨鼓風(fēng)機(jī)超載也會(huì)造成電機(jī)燒毀。羅茨風(fēng)機(jī)與電機(jī)的聯(lián)接方式有兩種，一種為聯(lián)軸器直聯(lián)，因羅茨鼓風(fēng)機(jī)的流量和壓力性能點(diǎn)較密集，電機(jī)轉(zhuǎn)速不同，則輸出流量和壓力不同，因此調(diào)節(jié)轉(zhuǎn)速可改變流量，所以，羅茨風(fēng)機(jī)還有一種常見的連接方式——皮帶聯(lián)接。當(dāng)羅茨風(fēng)機(jī)因各種原因出現(xiàn)卡頓時(shí)，電機(jī)提供的動(dòng)力無(wú)法正常帶動(dòng)風(fēng)機(jī)，則風(fēng)機(jī)軸功率超過(guò)電機(jī)功率，超過(guò)的越多，則電機(jī)燒毀的可能性越大，在羅茨風(fēng)機(jī)正常運(yùn)轉(zhuǎn)時(shí)，電機(jī)動(dòng)力綽綽有余，但風(fēng)機(jī)卡頓時(shí)，阻力遠(yuǎn)大于電機(jī)做功，則造成電機(jī)燒毀，這種情況一般屬于機(jī)械故障，通常與機(jī)頭關(guān)系密切，比如，羅茨風(fēng)機(jī)葉輪存在問(wèn)題，出現(xiàn)葉輪抱死，導(dǎo)致電機(jī)燒壞。

　　就使用情況來(lái)看：

　　1、缺相運(yùn)行，電機(jī)噪音大，發(fā)熱，時(shí)間稍長(zhǎng)會(huì)發(fā)熱燒毀。

　　2、電機(jī)本為星接380v,角接220v, 但實(shí)際使用時(shí)未注意此差別，現(xiàn)場(chǎng)實(shí)際為角接380v，導(dǎo)致電機(jī)燒毀。

　　3、電機(jī)軸承長(zhǎng)時(shí)間未做維護(hù):補(bǔ)油脂或換新軸承，運(yùn)行時(shí)發(fā)熱、電機(jī)掃鏜燒毀。

　　4、變頻控制，長(zhǎng)時(shí)間低頻運(yùn)行，未配強(qiáng)冷風(fēng)導(dǎo)致電機(jī)散熱不足燒毀。

　　5、若是制動(dòng)電機(jī)，制動(dòng)器故障打不開或未或未完全打開， 導(dǎo)致電機(jī)燒毀。

　　6、負(fù)載堵轉(zhuǎn)或電機(jī)長(zhǎng)時(shí)間過(guò)流燒毀。

　　7、電源電壓過(guò)高。電源電壓過(guò)高引 起電機(jī)繞組線圈過(guò)流而燒毀。

　　8、電機(jī)絕緣質(zhì)量欠佳。如匝間和相間短路或與外殼擊穿。

　　9、過(guò)載。如缺相，電源電壓過(guò)低，機(jī)械故障，功率配備余量過(guò)小都是過(guò)載的表現(xiàn)。引起電機(jī)燒毀*多的是電源缺相和機(jī)械故障

　　總之，造成羅茨風(fēng)機(jī)電機(jī)燒毀的常見原因一般就以上幾點(diǎn)。若您使用的羅茨風(fēng)機(jī)老是燒電機(jī)，請(qǐng)從上文介紹的原因中排查!同時(shí)，羅茨風(fēng)機(jī)電機(jī)和機(jī)頭在使用時(shí)，同樣需要進(jìn)行維護(hù)，平時(shí)注意清潔、風(fēng)機(jī)管路暢通、壓力值正常、盡量不受到外界惡劣環(huán)境因素的破壞，在使用時(shí)按照羅茨風(fēng)機(jī)廠家使用說(shuō)明書進(jìn)行操作，盡可能避免問(wèn)題出現(xiàn)。平時(shí)注意做好以上說(shuō)明的幾點(diǎn)，即可避免大多數(shù)的羅茨鼓風(fēng)機(jī)電機(jī)燒毀。

　　瑞柘環(huán)保生產(chǎn)銷售各種三葉、兩葉、密集、沉水、水冷等型號(hào)的羅茨鼓風(fēng)機(jī)!需要購(gòu)買羅茨風(fēng)機(jī)，請(qǐng)咨詢我們報(bào)價(jià)哦!若您遇到了羅茨鼓風(fēng)機(jī)老燒電機(jī)的情況，可根據(jù)上面的原因排查解決，如果仍然不能解決問(wèn)題的。請(qǐng)聯(lián)系我們，我們會(huì)安排相應(yīng)的維修師傅與您溝通，共同解決羅茨鼓風(fēng)機(jī)燒電機(jī)的問(wèn)題哦！

　　Roots blower generally uses motor as power source (also partially diesel engine as power source). Motor is an indispensable auxiliary equipment for Roots blower. Only when motor works properly can Roots blower work properly. Motor is the power source for Roots blower. If motor burns out, it means that blower loses power and will stop working. There are many reasons for motor burnout. The common reasons for burning motor of Roots blower are as follows.

　　I. Motor Phase-missing Operation

　　This is the killer of a three-phase asynchronous motor. The three-phase load is symmetrical when the motor is in normal operation, so the three-phase current is basically balanced and the size is equal. If the motor is out of phase during operation (the phenomenon that any phase in the three-phase winding is disconnected is called out of phase), the vibration of the fan will increase, abnormal sound will occur, speed will decrease, current will increase, and the temperature of the motor will rise sharply, which will cause the motor to burn out. A motor of average quality can burn out in up to ten minutes. The most terrible thing is that the whole power supply system is out of phase, in addition to many equipment switches that are self-locking or self-opening (e.g. fans, pumps), power supply after a power failure is out of phase, which may burn more than a dozen motors at once.

　　External damage to the motor results in burnout, such as short circuit between terminals loosened due to motor phase missing operation and fan vibration; The insulation of distribution cabinet or motor is reduced due to water inflow or moisture; Aging of equipment wires; Too much dust is involved; Incorrect working voltage, continuous high or low voltage will affect the normal operation of the Roots blower motor. When the Roots blower is working, the temperature of the motor rises sharply, resulting in the burnout of the motor. The motor of average quality may be burned out in ten minutes. What is worse is that the power supply system is out of phase. Many of the blower switches are self-locking or self-opening. Power supply is out of phase after a power failure. Several motors may burn out in one go. Therefore, before using the Roots blower, pay attention to check each index before starting, so as to reduce the fault.

　　2. Bearing damage.

　　Due to the continuous operation of Roots blower for a long time, the temperature of the motor body rises too high, and the lack of oil in the bearings until the bearings are damaged, shaft bending and belt breakage occur due to the lack of oil in the bearings replenishment and greasing in time. As a result, friction between the stator and rotor (commonly known as bore sweeping) causes the temperature of the iron core to rise sharply, burns down the groove insulation and turn-to-turn insulation, and causes short circuit between windings or fires on the ground. In serious cases, stator core will be chamfered, misaligned, shaft wear, end cover scrap, etc. Bearing damage is generally caused by the following reasons:

　　1. Improper assembly of bearings, such as uneven tapping on the inner race of bearings during cold installation makes the shaft worn, resulting in loss of interference or reduction of interference between inner race and outer race of bearings, resulting in running-in inner race phenomenon, and uneven tapping when installing end cap of motor, resulting in loose mating between bearing chamber of end cap and outer race of shaft. Whether the inner race or the outer race will cause the temperature rise of the bearing to rise sharply. As long as the bearing is in good condition, intermittent running of the outer race is allowed.

　　2. Bearing wall is not cleaned or greased. For example, to keep the bearings clean, the operation is to burn the bearings because the temperature rise is too high when the bearings roll to damage.

　　3. Bearing replacement and machining, large interference after motor end cap nesting or excessive ellipticity causes too small or uneven clearance of bearing ball, which leads to increased friction during bearing operation, and the temperature rises sharply until it burns out.

　　4. Due to axial misalignment of stator and rotor cores or inadequate precision after re-machining of rotating shafts, the inner and outer rings of bearings are not on a tangential surface, which causes the temperature of bearings to rise until they are burnt out.

　　5. Damage to bearings due to mixing of different types of grease.

　　6. Quality problems exist in the bearing itself, such as rust spots on the raceway, inflexible rotation, too small clearance, deformation of the holder, etc.

　　7. Standby machine does not run for a long time, grease deteriorates and bearings are rusty. Only pay attention to regular inspection and regular replacement of the same brand grease during its maintenance and maintenance.

　　3. Starting with the air valve closed or blocked will cause overload burnout

　　The air valve was not opened or was not opened enough after starting the Roots blower. The Roots blower operates under this condition, causing the temperature of the motor body to rise sharply until it burns out. When the air outlet or air valve is reset and the Roots blower is not switched off in time, the operation of the Roots blower will cause the temperature of the motor body to rise sharply until it burns out.

　　If the Roots blower is blocked greatly when starting, the current value of the motor exceeds the specified current value, which will cause the motor to overheat and burn out the winding for a long time. Therefore, when starting the Roots blower, it is necessary to start without load. Open all main and bypass valves first to start the Roots blower under air pressure. Close the valves several minutes after the normal operation of the roots blower under no load. Generally, in order to protect the motor, a step-down starting cabinet is also provided. In addition, when the main or bypass air vents or valves are closed and the Roots blower is not closed in time, the operation of the blower in this case will also cause the temperature of the motor to rise sharply and burn out. In addition to the high resistance when the Roots blower starts or closes, there are other factors such as the actual pressure of the piping system exceeds the nameplate pressure value. For example, foreign bodies in the blower piping may not be removed in time, or the motor may be burned out. Therefore, it is necessary to constantly observe whether the pressure gauge is normal, and constantly observe and clean up foreign bodies in the piping to keep it unblocked.

　　The boost value of the roots blower is indicated on the roots blower nameplate as the resistance that the roots blower can withstand at this motor power. Roots blower sucks in airflow and then pressurizes the rear airflow through the forced drive of the rotor to output the system. When the resistance of the system far exceeds the boost value of the equipment, there will be insufficient power. When the resistance is greater than the boost value, the power output of the motor is deficient. At first, it will be shown as the heat of the motor. If the coil continues to be used, the motor will be burnt out. If the fan is selected incorrectly, it needs to be re-selected. Therefore, it is very important to select the right type and match the right power motor. When blocked, the resistance will also exceed the specified boost value, so it is necessary to clean the blower line thoroughly. For example, if the check valve is reversed, the resistance of Roots blower will increase instantaneously, which will cause motor burnout. All of these are common reasons for motor burnout.

　　IV. Moisture and high temperature

　　Reduced insulation due to water ingress or moisture in the distribution cabinet or motor is also a common cause of damage, but there is no way to protect it. Only pay attention to and periodically shake insulation during use. Drying and re-dipping can be done before the motor explodes. Especially for motors driven by converters, be more careful about this, or you may reimburse the converters together.

　　The operating temperature of Roots blower is too high. For example, the reason why the temperature in the fan room is too high is often overlooked. Generally, when the ambient temperature is low, the Roots blower can be used smoothly. During the hot summer season, the temperature in the fan room is too high, and the heat generated by the operation of the blower can not be dissipated effectively in time. The air is continuously sucked in and boosted by the Roots blower, which causes the temperature in the machine room to increase continuously. When the temperature of the Roots blower is too high, This may lead to various situations, such as the failure of lubricant in gear box, the increase of gear friction, the problem of belt with drive, the failure of direct drive coupling and so on. All of these may lead to the concurrent problems of Roots blower and the burnout of motor. Therefore, the fan room needs effective sound insulation, at the same time, it also needs to ensure ventilation and ventilation, effective heat dissipation, to achieve the purpose of cooling, less faults.

　　V. OTHER

　　In addition, there are also uncommon reasons: for example, low or high voltage, overload and vibration cause terminal loosening and short circuit between phases, insect and mouse hazards, incompatibility of import motor voltage with domestic voltage (e.g. Japanese motor), motor quality. The Roots blower motor itself can also cause motor failure if there is a quality problem, and the general form of motor damage is burnout. Motor quality is good or bad, good quality motor is durable, long life, low quality motor has short service life and is prone to failure. Therefore, the selection of Roots blower can not blindly pursue low prices, comparing goods and choose carefully. Faults in various reduced pressure starting circuits cause non-switching, long time low voltage operation of motors, etc. The accident rate can be reduced by checking each index beforehand and starting after use.

　　Overload of Roots blowers can also cause motor burnout. There are two ways to connect a Roots blower to a motor. One is a coupling. Because the flow and pressure performance points of the Roots blower are dense and the speed of the motor is different, the output flow and pressure are different. Therefore, adjusting the speed can change the flow rate. Therefore, there is another common way to connect a Roots blower - belt connection. When a Roots blower is stuck due to various reasons, the power provided by the motor can not properly drive the blower, then the shaft power of the blower exceeds the power of the motor. The more power exceeds, the greater the possibility of burning the motor. When the Roots blower is in normal operation, the power of the motor is more than enough. However, when the blower is stuck, the resistance is much greater than the work done by the motor, causing the burning of the motor. This situation is generally a mechanical failure and is usually closely related to the head, for example. There is a problem with the impeller of Roots blower. The impeller is locked and the motor burns out.

　　In terms of usage:

　　1. When the motor operates in phase-absence mode, it will be noisy and hot, and burn out after a long time.

　　2. The motor was originally 380V star-connected and 220V angle-connected, but this difference was not noticed in actual use. In fact, the field is 380V angle-connected, which led to the burnout of the motor.

　　3. Motor bearings have not been maintained for a long time: repairing grease or replacing bearings, heating during operation, motor sweeping, boring and burning out.

　　4. Frequency conversion control, long-term low-frequency operation, without strong cooling air, resulting in insufficient heat dissipation of the motor burned out.

　　5. If the brake motor is braked, the brake fails to open or is not opened completely, resulting in the burnout of the motor.

　　6. The load is blocked or the motor is burnt out by overcurrent for a long time.

　　7. The supply voltage is too high. High supply voltage causes overcurrent of motor winding coils and burns them out.

　　8. Insulation quality of motor is poor. Such as short circuit between turns and between or breakdown with the housing.

　　9. Overload. If phase is missing, power supply voltage is too low, mechanical failure, and power allowance is too small, these are the manifestations of overload. The most common causes of motor burnout are power supply phase absence and mechanical failure.

　　In a word, the common causes of burnout of Roots blower motor are generally the above points. If the Roots blower you are using is always burning the motor, please check it out from the reasons described above! At the same time, when using the Roots blower motor and head, maintenance is also required. Pay attention to cleanliness, smooth blower lines, normal pressure values, and try not to be damaged by external harsh environmental factors. Operate according to the instructions of Roots blower manufacturer in order to avoid problems as far as possible. Pay attention to the points mentioned above in ordinary times to avoid most Roots blower motors from burning out.

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