During the use of the sand washing machine, the production is often affected by the failure of the motor. The main failure phenomena are:

1. Troubleshooting of stator and rotor cores

The stator and rotor are made of silicon steel sheets insulated from each other, which is the magnetic circuit part of the motor. The damage and deformation of the stator and rotor cores are mainly caused by the following aspects.

① Excessive wear or poor assembly of the bearings will cause the stator and rotor to rub against each other, damage the surface of the iron core, and then cause a short circuit between the silicon steel sheets, increase the iron loss of the motor, and cause the temperature rise of the motor to be too high. At this time, tools such as fine files should be used to remove burrs, remove short-circuits of silicon steel sheets, clean them, apply insulating varnish, and heat and dry.

② Excessive force was used when removing the old winding, which caused the stealing groove to be skewed and flared outward. At this time, tools such as needle-nose pliers and wooden hammers should be used to trim the teeth to reset the bad teeth, and add hard insulating materials such as green shell paper and bakelite boards between the silicon steel sheets that are difficult to reset.

③ The surface of the iron core is corroded due to damp and other reasons. At this time, it needs to be polished with sandpaper, and then coated with insulating paint after cleaning.

④The grounding around the group generates high heat and burns the iron core or teeth. The deposits can be removed with tools such as chisels or scrapers, and then coated with insulating paint and dried.

Placer gold beneficiation equipment ⑤ If the connection between the iron core and the machine base is loose, the original positioning screws can be tightened. If the positioning screw fails, re-drill and tap the positioning hole on the machine base, and tighten the positioning screw.

2. Bearing troubleshooting

The rotating shaft is supported and rotated by bearings. It is a part with a heavy load and a part that is easy to wear.

①Troubleshooting

Check during operation; when the rolling bearing is short of oil, you will hear the sound of “gulu gulu”; if you hear the discontinuous “stalk” sound, it may be that the bearing steel ring is broken. When sand and other sundries are mixed in the bearing or the bearing parts are slightly worn, slight noise will be produced.

Check after disassembly;

First check whether the rolling body of the bearing and the inner and outer steel rings are damaged, rusted, etc., then pinch the inner ring of the bearing with your hands, and make the bearing level, and push the outer rigid ring with the other hand. If the bearing is good, the outer steel ring should rotate Stable, no vibration and obvious stagnation during rotation, and no backlash of the outer steel ring after stopping. Otherwise, it means that the bearing can no longer be used. Clamp the outer ring with your left hand, pinch the inner steel ring with your right hand, and push it hard in all directions. If you feel loose when pushing, it means serious wear and tear. the

②Troubleshooting

The rust spots on the outer surface of the bearing can be wiped off with No. 00 sandpaper, and then cleaned in gasoline; or when the bearing has cracks, the inner and outer rings are broken, or the bearing is excessively worn, the bearing should be replaced with a new one. When replacing a new bearing, use the same bearing as the original model.

3. Shaft troubleshooting

①The shaft is bent; if the bending is not large, it can be repaired by polishing the journal and slip ring; if the bending exceeds 0.2mm, the shaft can be placed under the press and corrected by applying pressure to the bent part, and the corrected shaft The surface is cut and polished with a lathe; if the bending is too large, a new shaft needs to be replaced.

② Journal wear; when the journal wear is not large, a layer of chrome can be plated on the journal, and then ground to the required size; If the journal wears too much, turn 2-3mm on the journal, and then turn a sleeve, put it on the journal while it is hot, and then turn it to the required size.