How to solve the issue that mobile hammer crusher has low crushing capacity and short service life？

Correct use and scientific maintenance is an effective way to keep the equipment in good condition and improve the service life of hammers. Improper operation and maintenance will not only cause equipment failure, such as vibration, noise, heating, wear and tear, but also greatly reduce the service life of high manganese steel hammers.

The following points should be paid attention to in the daily use and maintenance of hammering.

① The feeding size shall be properly controlled according to the hammering model and design requirements, and it is strictly prohibited to put the materials exceeding the design limit size into the crushing cavity.

② As there is a certain error in the quality of hammers during casting, when replacing new hammers, weigh them and divide them into several groups according to the mass. The mass of each group and the left and right masses are required to be equal. Otherwise, the imbalance of the rotor during start-up will easily cause vibration, resulting in uneven hammering of hammers, different wear speed of each hammer and reduced service life of the whole set of hammers.

③ The plate feeder adopts a variable frequency motor to ensure uniform feeding and control the feeding speed to avoid excessive impact on the crusher rotor or blockage in the crusher cavity due to uneven feeding, which will accelerate the wear of the hammer head.

④ Check the clearance between the hammerhead and the screen bar, and the clearance between the screen bars when stopping, adjust it if necessary, and replace the screen bar regularly to make it in a proper and reasonable range, which not only meets the production requirements, but also does not cause material accumulation. The internal clearance of the crusher mainly refers to the clearance between the rotor body and the impact plate, sieve plate and hammer head. The size of these gaps is related to whether there is material accumulation near the sieve plate and the safety door. The hammer will be subject to severe wear if the buildup is present and the hammer is unable to depress the buildup from the sieve plate. Therefore, in the process of use, the clearance of each part must be adjusted frequently to make it within the appropriate range.

⑤ Control the water content of the materials, especially in the rainy season, try not to shovel the low-lying materials with more water and pour them into the crusher cavity. If conditions permit, the materials should be dried before entering the crusher to reduce the water content in the materials, which is helpful to improve their hardness coefficient, increase the stress on the hammer when the crusher works, and form a hardened layer. However, this method is limited by the requirements of crushing materials and sites.

⑥ When metal objects or lining plates fall off in the crusher, it is easy to cause damage and bending of the hammer disc and sieve plate frame, or accelerated wear and damage of the hammer head. Therefore, post operation inspection system and reward and punishment system should be formulated to give full play to the initiative of people. Once found, the machine should be shut down in time and the metal objects or lining plates in the crusher bin should be taken out.

⑦ The more impurities in the material, the more it will affect the crushing capacity of the high manganese steel hammer, resulting in a significant reduction in the life of the hammer. Therefore, it is very important to reasonably match the material, especially the mud, which should be reasonably matched when poured into the crusher cavity.

⑧ Under the action of larger impact or contact stress, the surface layer of high manganese steel hammer will rapidly produce work hardening, its work hardening index is 5 ~ 7 times higher than that of other materials, and its wear resistance has been greatly improved. Therefore, after replacing the new high manganese steel hammer, when it is used for the first time, the material with higher hardness, better quality and less impurities should be poured into the crusher for hammering. The high manganese steel hammerhead is rapidly hardened (which will directly affect the service life of the hammerhead in the future).

⑨ In the production of hammering, the technical parameters of hammering will also affect the service life of hammers. The power and speed of the rotor not only directly affect the production capacity of the crusher, but also affect the degree of impact hardening of the high manganese steel hammer. In order to improve the service life of the high manganese steel hammer of the crusher, it must have enough impact force, that is, when the rotor reaches a certain speed, it can be put into production.

⑩ It is necessary to clean accumulated materials inside the crusher regularly. The existence of the accumulated materials will cause serious wear and tear on the hammer head and sharply reduce its service life.

In actual production and use, different anti-wear measures should be taken according to different influencing factors to improve the service life of high manganese steel hammerhead. The high manganese steel hammerhead is used and maintained correctly, reasonably and scientifically in accordance with the material, so that the high manganese steel hammerhead maintains higher hardness and wear resistance, the service life of the high manganese steel hammerhead of the hammer crusher is effectively prolonged, and the ore production cost and the labor intensity of workers are reduced.