subject: Ball Mill Common Faults Deal With [print this page] Ball Mill commissioning requirements Ball Mill commissioning requirements
In accordance with the
ball mill motor, motor joint reducer, reducer ball joint commissioning sequence. China's cement machinery and equipment installation and construction of temporary technical point of order acceptance "Building Regulation 7-62," provides air motor running 4 hours, 8 hours operation with a gear, with ball mill running 24 hours. Ball spindle and drive shaft tile temperature does not exceed 55 , reducer bearing temperature does not exceed 70 , on that pass. Now there is no clearly defined foreign, ball mill operation time, the general operation of two or three hours later, temperature and vibration to keep within the specified scope, then that qualified.
1, ball mill is running, there are rules of the beat sound, and sound great. Is part of the liner bolt not tightened, the ball rotation, ball mill shell liner hit. By the sound of Ball mill site, to find loose bolts, further tightening.2, ball bearings and the motor temperature exceeds the set. Hand touch test is local or all bearing temperature is too high, several checks from the following processing mill.(1) Check the ball all parts of the lubrication points, grades of lubricating oil used in the factory specifications and equipment are the same.(2) Check whether the ball mill oil and grease deterioration.(3) Check whether the plug pipe mill lubrication, or no direct access to lubrication points, lubricants, fuel shortage caused by fever.(4) ball mill side of the gap is too small, bearing and shaft clearance is too large, too many contact points, can not form a uniform bearing on the film.(5) ball bearing grease too much or too little, too much grease form a ball stirring heat and difficult to shed heat. Too few poor lubrication, should be required to add a little oil, usually bearing gap of 1 / 3 to 1 / 2 is more appropriate.(6) ball mill grinding both ends of the hollow body axis tight seal, or seal body iron directly in contact with the shaft.The above problems, according to the reasons for processing, only the side bearing clearance is too small, or the bottom of the contact angle is too large, you must wear tube top with a hydraulic jack, the side of the bearing from the shaft out, be scraped Research tile mouth.3, ball bearings fever reducer:Except Bearing Temperature checks should be checked reducer vent is blocked, to clear the vent.4, ball mill motor with gear starts, vibration, mainly due to:(1) coupling of the two ball mill gap is too small, not to compensate for motor starts, the magnetic center from the self-inflicted due to runout.(2) ball coupling alignment method does not, resulting in two-axis misalignment.(3) Bolts of ball coupling is not relative, said tightening and tightening force levels are different.(4) ball bearing outer ring activities.Approach: the required clearance adjustment on the wheel well, so that the two concentric shafts. Tightening torque coupling with equal symmetry the coupling bolt.Rotor imbalance, it will be to find out ball rotor static balance.5, ball mill gear drive significant vibration occurs when:(1) ball mill and the balance shaft gear, the axis is not a line, and their causes are:Mill liner installation, no secondary grouting, after grouting the bolt or two is not fastened well, with a winch rotating grinding cylinder, resulting in grinding cylinder one end of the displacement, and the two axes is not a straight line, After making gear driven mill and vibration.Approach: To re-adjust to ball mill gear shaft axis and axis line in the same plane.
