The factor that affects the service life of the impact plate. The impact plate is the wear-resistant part second only to the blow bar, and it accepts a large impact load.
1. The raw material of the impact plate is generally cast with high manganese steel, and medium carbon steel rods are also used. When the coal is broken, it can also be welded with ordinary steel plates. The impact plate cast with high manganese steel has a relatively low lifespan according to the application of the impact crusher. It is necessary to study the wear-resistant material of the impact plate.
Some foreign factories use wear-resistant plastic to wrap the impact plate, or melt stones in the groove of the impact plate to replace the metal surface, which improves the service life of the impact plate. Some factories, according to the wear rules of the impact plate, select some partition devices and replace them according to the wear degree of each part, and the service life is more than doubled.
2. The shape of the impact plate In addition to improving its wear resistance in terms of the material of the impact plate, the shape of the impact plate is also worth noting. Some impact crushers use zigzag impact plates. Although the structure is simple and the production is simple, it cannot guarantee the most effective impact crushing of the crushed materials, and the crushing cavity is often reduced, and the edges and corners of the impact plate will also wear out quickly.
Because the material is not perpendicular to the impact plate, shear force often occurs, forming the impact plate to accelerate the wear. In addition, the broken line is often caused by the adhesion of powder or wet material, which further reduces the crushing cavity and affects the crushing effect.
Precautions for the use of impact crusher rotors
1. The static balance of the rotor The impact crusher should pay special attention to the static balance of the rotor during installation, work and maintenance. Regardless of turning around or replacing the blow bars, the blow bars on the rotor should be exchanged together to prevent the static imbalance of the rotor from causing severe vibration and bearing heating. When the blow bar is turned around or replaced with a new blow bar, it should be weighed, and the blow bars with the same weight or a very small weight difference (0.5kg) should be arranged symmetrically along the circumference, so that the entire rotor is in a state of static balance. If there is still an emphasis, the method of temporarily adding a balance weight to the rotor can be used to deal with it.
2. During the working process of the smooth machine of the rotor, pay attention to observe the temperature rise of the main bearing of the rotor, which should not exceed 60℃ normally, and should not exceed 75℃ at most. If the temperature rise exceeds this rule, you should park the car quickly to check and take effective measures. The rolling bearings at both ends of the rotor can be used for oil or molybdenum disulfide grease lubrication, and a small amount (2-3 times) of grease is injected regularly every shift.
3. Sealed dust removal During the work of the impact crusher, the dust is relatively large. In addition to the good sealing of all parts of the crusher, ventilation and dust collection equipment should be installed in the workshop. If it is a double-rotor impact crusher, the transmission parts of the two rotors should be started separately. The starting sequence of the whole set of crushing equipment should be: dust collection equipment-conveyor-crusher-feeder; the parking sequence is just the opposite.
Correctly install, maintain and protect the counterattack breaker. If a bad condition is found during operation, it must be stopped immediately for maintenance to prevent greater losses and ensure the stable operation of the equipment.
Shanvim as a global supplier of crusher wearing parts, we manufacture cone crusher wearing parts for different brands of crushers. We have more than 20 years of history in the field of CRUSHER WEAR PARTS. Since 2010, we have exported to America, Europe, Africa and other countries in the world.
Post time: Sep-07-2022