The motor end cover bearing chamber wear causes and repair methods

The motor end cover bearing room 2019 - the reason and repair method 05 - 16 abstract: according to the method in this paper, combined with work reality, select the appropriate repair process on the motor end cover bearing housing repair wear and tear, reduce the maintenance cost for the enterprise. Preface: motor is an indispensable equipment in industrial production, in the motor maintenance, often there will be a serious motor bearing housing and bearing outer ring with size out-of-tolerance, lead to equipment damage. Traditional methods generally adopt the way of play pitting repair, but this method will lead to the secondary damage to the plant out-of-tolerance quantity increases sharply, at this time can only change the motor end cover, cause the material waste, increase the maintenance cost, and due to such accessories for non standard parts, spare parts to the difficult, increase equipment repair cycle, seriously restrain the production of the enterprise. Therefore, looking for a convenient motor bearing housing repair technology has become the authors efficiency way. A, the motor end cover bearing chamber 1 damage reason analysis. The rotor shaft bending deformation ( Rotor dynamic balancing bad) Runtime bearing vibration increase, resulting in motor, the motor end cover and bearing inner ring with super bad. 2. Motor assembly process is poor, motor rotor, bearing and end cover different heart, lead to increase shock when the motor running. 3. In the motor assembly is not reasonable, the runtime to run, result in bearing chamber super poor. 4. Motor grease filling quantity is not enough, lead to equipment run short of oil bearing heating, the cause of fit clearance was bearing inner and outer circle of relative movement. 5. When the motor running violent vibration, which leads to the damage of the bearing chamber, bearing vibration reasons ( Such as motor open phase running, three-phase voltage, current inequality) 。 Second, some cement enterprise equipment problems of the motor end cover problem of equipment for the cement enterprise blower motor, equipment vibration, sound. Temperature is a little on the high side, 70℃） , after checking, confirm the motor end cover bearing chamber wear. Equipment parameters: the bearing chamber diameter of 325 mm, width 70 mm, the speed of 1240 r/min. Material is cast iron, the working temperature of 40 ℃ - - 60 ℃, lubricating grease is the mode. The abrasion of the bearing chamber 0. About 7 mm. Three, bearing housing repair methods and process 1, brush plating technology to repair because of the bearing chamber for cast iron parts, cast iron is easy to appear the casting defects ( Trachoma, shrinkage cavity, etc. ) , these areas are easy to save oil, surface cleaning not clean, it is difficult to guarantee the bonding strength of coating and the magnesium substrate, therefore cast iron using brush plating technology difficulty is larger. And now on the market of tin fluid contains harmful substances, pose a safety hazard to homework personnel. 2, repair welding, turning technology to repair iron repair welding process requirement is high, the welding process is not pass lead to overall welding layer falls off, and weld hardness is higher, difficult to machining. Weld heat small workpiece deformation easily. 3, the blue polymer composite materials to repair process 3. 1 repair machining process: the use of polymer composite materials have high cohesiveness, high strength, compressive properties, belong to 'cold welding' technology, thermal stress effects on the substrate. The daub after clean and dry surface treatment materials, carried out in accordance with the fit tolerance of workpiece material after curing processing and repair. 3. Corresponding relationship repair method of two parts: the abrasion of the bearing chamber is measured with inside diameter micrometer, determine the unworn benchmark size, determine the material consumption. According to the unworn datum of cylindrical dies, mold diameter size 2 - smaller than the bearing outer ring - 2-3 wire, the width is greater than the bearing chamber width - 3cm。 Mould outside daub after a release agent layer dry wear repair of bearing chamber, the material after curing with 400 sandpaper to polish the surface. Fix complete assembly. 3. 3 benchmark blow grind process repair: using the unworn standard size with blade feet repair worn parts. Four, the blue legend polymer composite materials to repair five, the conclusion through the cooperation with enterprises make the enterprise cost savings, save labor, increase the service life of the equipment, make the enterprise save capital be incalculable. F the blue for many years the company to help enterprises to establish an advanced maintenance team, improve the level of enterprise equipment management as its own duty, through constant integration of the world's leading equipment maintenance maintenance technology, professional service for industrial enterprises. （ F the blue)