羅茨鼓風機一般采用電機為動力源(也有部分以柴油機為動力源)，電機是羅茨風機必不可少的配套設備，電機正常工作，羅茨鼓風機才能正常工作，電機作為羅茨風機的動力源，如果電機燒壞(燒毀)就意味著風機失去了動力，會停止工作，電機燒壞的原因有很多，常見羅茨風機燒電機的原因有以下幾點。

　　一、電機缺相運行

　　這是個三相異步電機的殺手，電機正常運行時三相負載為對稱負載，因此 三相電流基本保持平衡，大小相等，如果運行中電機缺相(三相繞組中任一相斷開的現象叫缺相)，風機振動將會變大、出現異常聲音、轉速下降、電流增加，電機溫度將會急劇升高， 從而導致電機燒壞，質量一般的電機*多十幾分鐘就會燒壞。*可怕的是整個供電系統的缺 相，再加上很多設備的開關是自鎖的或自動開啟的(如風機、水泵)，一次停電后的再送電缺相事故，可能一下燒十幾個電機。

　　電機受到外在侵害導致燒毀壞比如，電機缺相運行、風機振動造成接線柱松脫相間短路;配電柜或電機進水或受潮造成絕緣降低;設備電線老化;灰塵介入太多;工作電壓不對，電壓持續過高或者過低，這些情況都會影響羅茨風機電機的正常工作，羅茨風機工作時，電機溫度急劇升高，導致電機燒毀，質量一般的電機可能在十幾分鐘內被燒毀，更可怕的是供電系統缺相，很多風機的開關是自鎖的或自動開啟的，一次停電后的再送電缺相事故，可能一下會燒壞多臺電機。所以，羅茨風機在使用前，注意檢查各項指標正常后再啟動，可以減少故障。

　　二、軸承損壞。

　　由于長時間不間斷的讓羅茨風機運行致使由于電機本體運行溫升過高，且軸承補充加油脂不及時造成軸承缺油直至軸承損壞、會出現軸彎曲、皮帶斷裂等現象，致使定、 轉子摩擦(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 短路或對地“放炮”。嚴重時會使定子鐵心倒槽、錯位、轉軸磨損、端蓋報廢等。軸承損壞一般還有下列原因造成：

　　1、軸承裝配不當，如冷裝時不均勻敲擊軸承內圈使軸受到磨損，導致 軸承內圈與外圈配合失去過盈量或過盈量變小，出現跑內圈現象，裝電機端蓋時不均勻敲擊， 導致端蓋軸承室與軸外圈配合過松出現跑外圈現象。無論跑內圈還是跑跑外圈均會引起軸承 運行溫升急劇上升，只要軸承完好，允許間斷性跑外圈現象存在。

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

　　3、軸承重新更換加工，電機端蓋嵌套后過盈量大或橢圓度超標引起軸承滾珠游隙過小或不均勻導致軸承運行時摩擦力增加，溫度急劇上升直至燒毀。

　　4、由于定、轉子鐵心軸向錯位或重新對轉軸機加工后精度不夠，致使軸承內、外圈不在一個切面上而引起軸承運行“吃別勁”后溫升高直至燒毀。

　　5、由于不同型號的油脂混用造成軸承損壞。

　　6、軸承本 身存在質量問題，例如滾道銹斑、轉動不靈活、游隙過小、保持架變形等。

　　7、備用機長期不運行，油脂變質，軸承生銹而唯有對其保養和維護只能使用中注意定期檢查和定期更換相同品牌油脂。

　　三、風閥關閉或堵塞的情況下啟動會造成過載燒毀

　　由于羅茨風機啟動后風閥未有打開或打開的量不夠。而羅茨風機在此情況運行下，致使由于電機本體運行溫度急劇上升直至燒毀。風口或風閥復位后，而羅茨風機未及時關閉，而羅茨風機在此情況運行下，也會致使由于電機本體運行溫度急劇上升直至燒毀。

　　羅茨鼓風機啟動時受阻較大，則電機電流值超過規定電流值，造成電機過熱，持續時間較長會造成繞組燒毀。所以，羅茨風機啟動時要空載啟動，先打開所有主路、旁路閥門，使羅茨風機空壓啟動，待風機空載正常運轉數分鐘后，再關閉閥門，一般情況下，為了保護電機還會配備降壓啟動柜。還有，當主路或者旁路風口或閥門關閉后，而羅茨風機未及時關閉，而風機在此情況下運行，也會導致電機運行溫度急劇上升、燒毀。除了羅茨風機啟動或關閉時阻力較大，還有其他諸如管道系統實際壓力超過銘牌壓力值，比如，風機管路有異物進入沒有及時排除，也可能會造成燒壞電機，所以，需要經常觀察壓力表是否正常，經常觀察并清理管路異物，保持暢通。

　　羅茨鼓風機銘牌上標注了風機升壓值，表示羅茨鼓風機在此電機功率下所能承受的阻力。羅茨風機吸入氣流，經過轉子的強制推動后氣流升壓，輸出系統。當系統阻力遠超設備的升壓值時，會出現動力不夠，當阻力大于升壓值時，電機輸出的功欠缺，剛開始會表現為電機發熱，繼續使用線圈將被燒斷，電機被燒毀。如果屬于風機選型錯誤，則需要重新選型，所以，選擇適當的機型，匹配合適功率的電機非常重要。當風機管路堵塞時，也會出現阻力超過規定升壓值，需要全面清理風機管路，比如，止回閥裝反，會瞬間增大羅茨風機的阻力，導致電機燒壞，這都是較常見的電機燒毀原因。

　　四、受潮與高溫

　　因為配電柜或電機進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。只能使用中注意和定期搖絕緣。在電機沒爆以前，烘干、重新浸漆可解決。尤其是用變頻器驅動的電機，更要小心此項，不然可能連變頻器一塊報銷。

　　羅茨風機運行溫度過高，比如，風機房溫度過高這個原因常被忽視，一般情況下，環境溫度較低時，羅茨風機可使用順利，可到了夏天高溫季節，風機房內溫度過高，加上風機運轉產生的熱量不能及時有效散熱，空氣經過羅茨風機的不斷吸入、升壓，使得機房內溫度不斷升高，當羅茨風機溫度過高，會導致各種情況的發生，比如，齒輪箱潤滑油失效，齒輪摩擦力增大，帶連傳動皮帶出現問題，直連傳動聯軸器出現故障等，這些都可能引發羅茨風機并發問題，造成電機燒毀。所以，風機房需要有效隔音的同時，也要確保風機房的通風換氣，有效散熱，達到降溫的目的，較少故障。

　　五、其它

　　另外還有的不是很常見的原因：如電壓過低或過高，超載、震動造成接線柱松脫相間短路，蟲鼠危害、進口電機電壓與國內電壓不配合(如日本電機)、電機質量。羅茨風機電機的本身如果存在質量問題，也會造成電機故障，而電機的一般損壞形式是燒毀。電機的品質有好有壞，質量好的電機耐用，壽命會長久，質量低的則使用壽命則短，容易出故障。所以，選擇羅茨風機不能一味追求低價，貨比三家，慎重選擇。各種減壓起動回路故障造成不轉換，電機長時間低壓工作等等。在使用前注意預先檢查各項指標后在啟動，可以減小事故率。

　　羅茨鼓風機超載也會造成電機燒毀。羅茨風機與電機的聯接方式有兩種，一種為聯軸器直聯，因羅茨鼓風機的流量和壓力性能點較密集，電機轉速不同，則輸出流量和壓力不同，因此調節轉速可改變流量，所以，羅茨風機還有一種常見的連接方式——皮帶聯接。當羅茨風機因各種原因出現卡頓時，電機提供的動力無法正常帶動風機，則風機軸功率超過電機功率，超過的越多，則電機燒毀的可能性越大，在羅茨風機正常運轉時，電機動力綽綽有余，但風機卡頓時，阻力遠大于電機做功，則造成電機燒毀，這種情況一般屬于機械故障，通常與機頭關系密切，比如，羅茨風機葉輪存在問題，出現葉輪抱死，導致電機燒壞。

　　就使用情況來看：

　　1、缺相運行，電機噪音大，發熱，時間稍長會發熱燒毀。

　　2、電機本為星接380v,角接220v, 但實際使用時未注意此差別，現場實際為角接380v，導致電機燒毀。

　　3、電機軸承長時間未做維護:補油脂或換新軸承，運行時發熱、電機掃鏜燒毀。

　　4、變頻控制，長時間低頻運行，未配強冷風導致電機散熱不足燒毀。

　　5、若是制動電機，制動器故障打不開或未或未完全打開， 導致電機燒毀。

　　6、負載堵轉或電機長時間過流燒毀。

　　7、電源電壓過高。電源電壓過高引 起電機繞組線圈過流而燒毀。

　　8、電機絕緣質量欠佳。如匝間和相間短路或與外殼擊穿。

　　9、過載。如缺相，電源電壓過低，機械故障，功率配備余量過小都是過載的表現。引起電機燒毀*多的是電源缺相和機械故障

　　總之，造成羅茨風機電機燒毀的常見原因一般就以上幾點。若您使用的羅茨風機老是燒電機，請從上文介紹的原因中排查!同時，羅茨風機電機和機頭在使用時，同樣需要進行維護，平時注意清潔、風機管路暢通、壓力值正常、盡量不受到外界惡劣環境因素的破壞，在使用時按照羅茨風機廠家使用說明書進行操作，盡可能避免問題出現。平時注意做好以上說明的幾點，即可避免大多數的羅茨鼓風機電機燒毀。

　　瑞柘環保生產銷售各種三葉、兩葉、密集、沉水、水冷等型號的羅茨鼓風機!需要購買羅茨風機，請咨詢我們報價哦!若您遇到了羅茨鼓風機老燒電機的情況，可根據上面的原因排查解決，如果仍然不能解決問題的。請聯系我們，我們會安排相應的維修師傅與您溝通，共同解決羅茨鼓風機燒電機的問題哦！

　　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.

　　Rye Environmental Production and Sales of various three-leaf, two-leaf, dense, submerged, water-cooled Roots blower models! Need to buy Roots blower, please consult us for quotation!