The hammer head is one of the parts of the hammer crusher that is easy to wear. This article will detail the factors affecting hammer wear and solutions.
Hammer head wear factor
1, the impact of the properties of materials to be crushed
The effect of the material to be broken on hammer wear includes the nature of the material, the size of the feed and the size of the water content, as well as the effect of the material nature, the greater the hardness of the material on the hammer.
2, the effect of processing capacity and discharge gap
The processing capacity of the equipment also has a certain impact on hammer wear. When the processing capacity is increased, the product particle size will be coarser, the crushing ratio will be reduced, and the unit wear of the hammer head will be reduced. Similarly, changing the size of the discharge gap can also change the thickness of the product to a certain extent, so it also has a certain impact on the wear of the hammer.
3, improper use of operation
Because the hammer head often breaks, maintenance personnel replace the hammer head with a lot of work and labor intensity. Therefore, after installing the new hammer head, the inspection will not be stopped in time, and the bolts cannot be tightened in time. As a result, hammer wear accelerates.
4, the effect of linear speed
Linear velocity is a working parameter that affects hammer wear. The linear speed directly affects the impact energy exerted by the hammer on the material, the size of the crushing ratio, and plays a decisive role in the particle size of the product. In addition, too high line speed may also cause a sharp increase in hammer wear due to too high line speed, the material cannot enter the impact zone, and the end of the hammer end is severely worn.
solution
1, improve the utilization rate of the hammer, reduce the hammer replacement time
The utilization rate and replacement time of the hammer head are closely related to its structural form and fixed fastening method. Therefore, it is possible to use symmetrical structural forms, simple fastening methods, large clamshell, large inspection door shell, etc., to improve the metal utilization rate of the hammer head and extend the service life.
2. Surfacing cemented carbide
After the hammer is worn to a certain extent, it is also an effective way to weld the cemented carbide on the worn surface.
3, reasonable selection of working parameters and structural parameters
Hammer crusher is mainly used to smash the material with the hammer head, the unit pure wear of the hammer head is proportional to the square to the square of the linear speed, so choose a reasonable linear speed to ensure the particle size of the product. Can reduce the rotor speed.
4, strengthen the use and maintenance management
First, when installing the hammer head, it is necessary to remove sand and burrs from the hammer bolt holes and indents so that the joint is flat when connected. Second, when tightening the hammer bolt, strike the elbow while tightening. Finally, check for bolt tightening about half an hour after surgery. After tightening, weld the nut to the thread to prevent loosening.
5, improve the wear resistance of hammer material
The material of the hammer head is usually made of high manganese steel, which is suitable for breaking materials of medium hardness. However, when crushing hard materials, the hammer head must have good corrosion resistance and must also have high wear resistance.
Post time: Dec-24-2024