Maintenance points for the three major failures of the crusher
Crusher equipment mine production as the main apparatus, the main sizes for crushing stone crusher equipment mainly jaw crusher, impact crusher, impact crusher, double-roll crusher, hammer crusher, and Cone crusher and other equipment.
Introduction to the troubleshooting points of the crusher
Crusher three fault: Troubleshooting bearing, and the fixed shaft troubleshooting, troubleshooting the rotor core. Below we will analyze the three major troubleshooting points:
First, the bearing fault repairs the worn parts
The shaft is rotated by the bearing support, which is the heaviest part of the load and is a component that is easily worn.
1 fault check
In-service inspection; when the rolling bearing is short of oil, you will hear the sound of “bone bonesâ€; if you hear the sound of a discontinuous “stalkâ€, the bearing steel ring may be broken. When the bearing is mixed with sand or other debris or the bearing parts are slightly worn, slight noise is generated.
Check after disassembly; first check whether the crusher bearing rolling element, inner and outer steel ring is damaged, rust, scar, etc., then pinch the inner ring of the bearing, and flatten the bearing, the other hand push the outer rigid ring, if The bearing is good, the outer steel ring should rotate smoothly, there is no vibration and obvious stuck in the rotation, and the outer steel ring does not reverse after stopping. Otherwise the bearing is no longer usable. The left hand is stuck in the outer ring, and the right hand pinches the inner steel ring and pushes it in all directions. If it feels loose when pushed, it is severely worn.
2 fault repair
The rust on the outer surface of the bearing can be erased with sandpaper and then cleaned in gasoline; or if the bearing has cracks, 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 failure repair
1 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; when there is more wear, it can be surfacing on the journal and then cut and polished on the lathe; If the journal wear is too large, it is also turned 2-3 mm on the journal, and then a sleeve is placed, which is placed on the journal and then turned to the required size.
2 axis bending; if the crusher shaft is not bent, it can be repaired by polishing the journal and slip ring; if the bending is more than 0.2mm, the shaft can be placed under the press, and the pressure can be corrected and corrected in the bending position. The rear surface of the shaft is polished with a lathe; if the bending is too large, a new shaft is required.
Third, fixed, rotor core troubleshooting
Both the stator and the rotor are laminated by mutually insulated silicon steel sheets, which are the magnetic circuit portions of the motor. The damage and deformation of the stator core are mainly caused by the following reasons.
1 The crusher bearing is excessively worn or poorly assembled, causing the stator and rotor to rub, causing damage to the surface of the iron core, which in turn causes short circuit between the silicon steel sheets, and the iron loss of the motor increases, causing the temperature rise of the motor to be too high. At this time, use tools such as fine boring to remove the burr, eliminate the short-circuit of the silicon steel sheet, clean it, apply the insulating varnish, and heat and dry.
2 Excessive force when removing the old windings causes the slots to be skewed and flared outward. At this time, tools such as needle-nosed pliers and wooden hoes are used for dressing to reset the gullets, and a hard insulating material such as green paper or rubber wood is added between the gap-free silicon steel sheets which are not well-reset.
3 The surface of the core is corroded due to moisture and other reasons. At this point, it needs to be sanded and cleaned, and then coated with insulating varnish.
4 Around the group grounding, high heat is burned out of the core groove or tooth. The deposit can be removed by a tool such as a chisel or a scraper, and dried with an insulating varnish.
5 The iron core and the base are loosely combined to tighten the original set screw. If the positioning screw fails, re-drill the positioning hole on the base and tap the wire to tighten the set screw.
The fixing angle of a Tower Crane refers to the angle at which the crane is secured to its base or foundation. It is important to ensure that the crane is properly fixed at the correct angle to ensure stability and safety during operation.
The fixing angle of a tower crane is typically determined by the manufacturer and specified in the crane's operating manual. It is usually set at a specific angle to provide optimal stability and load capacity for the crane.
The fixing angle can be adjusted during the initial installation of the crane to ensure it is level and properly aligned. This is typically done using leveling jacks or other adjustable components at the base of the crane.
It is important to follow the manufacturer's guidelines and recommendations when setting the fixing angle of a tower crane to ensure safe and efficient operation. Improper fixing angle can lead to instability, tipping, or other safety hazards.
Tower crane fixing angle is connected between tower body and concrete foundation. Usually, the model of fixing angle is based on the tower crane Mast Section, such as 1.2m s24 mast section, 1.6m L46a1 mast section, 2.0m l68b2 mast section.
Fixing angle is used for connecting of tower crane foundation and tower crane body. Usually the fixing angle is fixed inside the concrete foundation. However, there is one type of tower crane fixing angle which is reusable type. The reusable type fixing angle could be removed from the foundation after tower crane disassembly.
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