What are the main points of repair for the three major faults of the crusher?
In the metallurgy, mining, chemical, cement, and other industrial sectors, a large amount of raw materials and reused waste materials are required to be processed by crushers every year. If, in a concentrator, the useful minerals in the ore are separated into monomers, the crusher is required to crush the ore into the size required for the grinding process. The crushing machinery is needed to crush the raw material to the required particle size for the next operation. In the coking plant, sintering plant, ceramics factory, glass industry, powder metallurgy and other departments, the crushing machinery must be used to crush the raw materials to the required particle size of the next operation.
Breaker troubleshooting tips
Three major faults crusher: bearing troubleshooting, shaft troubleshooting and fixing, rotor core troubleshooting. Here we analyze the three major troubleshooting points:
First, the bearing fault repair worn parts
The rotation of the shaft through the bearing support is the heaviest part of the load, and it is also a part that is subject to wear.
1, fault inspection
Inspection during operation; when the rolling bearing lacks oil, it will hear the sound of "bone hum"; if you hear the sound of discontinuous "terrier", it may be the bearing rim broken. When the bearing is mixed with sand and other debris or bearing parts have mild wear, it will produce a slight noise.
Check after disassembly; first check the rolling bearing of the crusher, whether the inner and outer rims are damaged, rusted, scars, etc., then hold the inner ring of the bearing by hand, and make the bearing flat, push the outer rim with the other hand, if The bearing is good, the outer rims should turn smoothly, there is no vibration and obvious seizure in the rotation, and the outer rims do not have a retrograde phenomenon after stopping. Otherwise, the bearing can no longer be used. Hold the outer ring with your left hand, hold the inner rim with your right hand, and push hard in all directions. If you feel loose when you push it, it is a serious wear.
2. Troubleshooting: The rust on the outer surface of the bearing can be wiped off with sandpaper and then cleaned in gasoline. If the bearing is cracked, the inner and outer rings are broken, or the bearing is excessively worn, the new bearing should be replaced. When replacing a new bearing, use the same bearing as the original model.
Second, the shaft troubleshooting
1, journal wear; journal wear is not large, you can plate a layer of chromium on the journal, and then grinding to the required size; wear more, can be surfacing on the journal, and then grinding on the lathe If the journal wear is too great, it is also turned 2-3mm on the journal, then a sleeve, hot sleeve on the journal, and then turned to the required size.
2, shaft bending; If the crusher shaft is not bent, can be repaired by grinding the journal, slip ring method; if the bending is more than 0.2mm, the shaft can be placed under the press, press the bend in the correction, The corrected shaft surface is ground with a lathe; if the bending is too large, a new shaft must be replaced.
Third, the stator and rotor core troubleshooting
The stator and rotor are made of silicon steel sheets insulated from each other and are the magnetic circuit part of the motor. The damage and deformation of stator and rotor cores are mainly caused by the following reasons.
1, crusher bearing excessive wear or poor assembly, resulting in fixed, rotor phase wipe, so that the core surface damage, resulting in short circuit between the silicon steel, motor iron loss increases, so that the motor temperature rise is too high. At this time, fine burrs and other tools are used to remove the burrs, eliminate the shorting of the silicon steel sheet, clean up and apply insulating paint, and heat and dry.
2. When the old winding is dismantled, the force is too great, making the splines skew and open outward. At this point the use of needle-nose pliers, wooden hammer head and other tools to be repaired, so that the cogging reset, and in the gap is not a good reset between the silicon steel sheet green shell paper, glue wood and other hard insulation materials.
3, due to moisture and other reasons cause the core surface rust. At this point, it needs to be polished with sandpaper, cleaned and painted with insulating paint.
4. Generate high-heat-burned core slots or teeth around the group ground. Chisels or scrapers can be used to remove the deposits and dry them with insulating paint.
5. The loose connection between the iron core and the base can tighten the original positioning screw. If the set screw fails, drill the positioning hole and tap on the base to tighten the set screw.
Jaw crusher installation need to pay attention to what are the problems?
Sand mill common troubleshooting methods