Coking pump 2/2 motor bearing sleeve of the side wear failure

Coking pump 2/2 motor bearing wear faults of the side - 2020 10 - Categories: 22 cases equipment case after: on November 7, 2016 morning, the coking unit for routine machine pump switch, when the pump 2/2 ( YB400M2 - 2 w 315千瓦) When the motor noise, then stop the pump contact electrician on duty personnel to the site inspection. Monitor maintenance and technical personnel to the scene, workshop production operators to start the pump again 2/2, motor metal friction sound coming from the side, was immediately through the fuel nozzle to refuel, motor voice without any change. Immediately inform the production stop pump, and check immediately to the collapse of the motor. Motor overhauling process, the non shaft extension end bearing examination without exception, when open axial stretching end ( Double bearing) And found that the shaft extension end bearing with explosion-proof bearing sleeve in adhesion, take out the bad and positioning, bearing rotating jamming shaft extension end bearing grease serious deterioration. Will locate out two sets of bearings, bearing damaged found working shaft extension end bearing ( NU218） Outer ring fracture whole, positioning bearing ( 6218). The outer ring and bearing severe wear. Sending bearing sleeve repair shop brush plating processing, readjust the fit clearance, motor on November 8 to install, the related to normal. Cause analysis: the motor shaft extension end bearing holding shaft failure has occurred in 2014, the overall return to nanyang motor factory for the repair, repair after the return has been running well, team regularly go to normal. The failure occurred when the motor running 8118 hours, this annual motor overhaul plan, the motor plans to 9000 hours for maintenance. According to the wear degree judgment should be due to the bearing quality problem, bearing vibration caused by unsmooth, due to the bearing and bearing sleeve with a certain gap, cause the bearing outer ring and bearing friction, lead to failure. Precaution: team to strengthen the detection of this type of motor running state, ready to go to work on a regular basis. Lessons learned: for running state is bad the motor fault happened in, on or before the new motor overhaul plan, to shorten the repair cycle, guarantee the safe operation of motor. Share: YuShaoCheng censorship: smile sun jun, HuoLiBing ( Source: Shi Lian all)