Flameproof motors

   It uses the flameproof enclosure may produce sparks, an explosive gas mixture temperature electrical arcing and dangerous parts of the surrounding separated . However, this is not a sealed enclosure , around the explosive gas mixture through the gap between the joining surfaces of the housing portion into the motor . When the inner shell of the spark , arc , dangerous temperatures and other ignition source contacts could explode , then not only does the motor flameproof enclosure damaged or deformed , and the explosion flames or hot gases through the joints when the gap came , can not ignite the surrounding explosive gas mixtures .

   According to ex -hung ball joint learned basic series of extensive low- current applications flameproof electrical products are YB series flameproof three-phase induction motor , which is Y series (IP44) three-phase asynchronous motors derived products. Explosion-proof performance in line with GB3836.1-83 " Electrical equipment for explosive atmospheres - General requirements" and GB3836.2-83 " Electrical equipment for explosive atmospheres flameproof electrical equipment " d "," provisions ; motor power range of O. 55-200kW, the corresponding frame sizes range from base center height of 80-315nun; proof mark dI, dIIAT4, dIIBT4, respectively, for fixed equipment in the coal mine or factory IIA, IIB level , temperature class T1 place flammable gas or vapor and air -T4 group to form an explosive mixture ; main enclosure protection class IP44, can also be made IP% 4, junction box protection class IP54; rated frequency of 50Hz, rated voltage is 380 , 1660,1140,380 / 660,660 / 140V; motor insulation class F, temperature rise class B , but according to the stator windings , with a larger temperature margin . Low-voltage three-phase asynchronous motors flameproof derived series of the main models : YB Series (dIIcT4) ( base center height of 80-315mm), YBSO series ( low-power , high -Block Center for the 63-90mm), YBF series ( fans use , frame heights 63-160mm), YB-H series ( marine , base center height of 80 ~ 280mm), YB series ( medium-sized , high -Block Center is 355-450mm), YBK series ( for use in mines , base center height of 100-315mm), YB-W, B-TH, YB-WTH series ( base center height of 80-315mm), YBDF-WF series ( outdoor corrosion flameproof electric valves , machine seat center height of 80-315mm) and YBDC series ( flameproof capacitor start single phase induction motor , base center height of 71-100mm) and YBZS series of two-speed hoisting flameproof three-phase asynchronous motors. In addition, YB series flameproof high voltage three-phase asynchronous motors ( base center height of 355 ~ 450mm ,560-710mm). Industry YB2 series was jointly designed by the identification of a four- country end will gradually replace YB series , and has become flameproof three-phase asynchronous motors basic series . YB2 series 15 frame size ( base heights 63,355 nmm), a power range of O. 12-315kW.

      Well Hung ball joint to explain its main features

    ( 1 ) power level , the correspondence between the size and speed of installation consistent with DIN42673, taking into account the inheritance and Y2 series of interchangeable YB series , made ​​the necessary adjustments , more effective and applicable .

    ( 2 ) the full range of class F insulation , temperature rise class B assessment.

    ( 3 ) noise limits lower than YB series , YB series close to I -level noise and vibration limits and YB series quite .
   
    ( 4 ) Protection up to IP55.

    ( 5 ) Full range of optional low-noise deep groove ball bearings, high -Block Center located at 180mm above the motor Note drain devices.
 
    ( 6 ) motor heat sink has two parallel horizontal distribution and the distribution of radiation , mainly parallel to the horizontal distribution .

    ( 7 ) Key performance indicators have reached 20 in the early 1990s the international advanced level.

Explosion-proof motor winding how to clean it?

    Dry rub

    When you need to clean the surface easily accessible and just want to get rid of dry dust with a clean , lint-free dry rub can get satisfactory results. Can not go back to cloth , because fluff will stick to the surface of the insulation increases the accumulation of dust . Fluff for high voltage motor insulation is particularly disadvantageous , since there is a possibility due to corona discharge .

    Brushing and suction cleaning method

   According to ex -hung ball joint note , you can brush with short, stiff brush to remove dry rub dirt ( not with a metal brush ) . Then vacuum suction clean. This is one of the best cleaning method , because it would not allow dust and deposit spread to other devices .

    Sway

    A jet of dry air to blow off the dust , only his hand is almost impossible to close the gap at the motor can not be humid and the air blowing direction should not allow dust into the inner depths of the motor chant , so difficult to remove and may block the ventilation channel .