Crushing hammer manufacturers emphasize the importance of new machine running in
Due to the bad working conditions of the hammer, proper maintenance can reduce the failure of the machine and prolong the service life of the machine. Here, the crushing hammer manufacturers emphasize that the new machine running in is very important for the service life of the crushing hammer. There are many users who use the hammer because of lack of common sense, or because of the tight schedule, or want to get profits as soon as possible, and ignore the special technical requirements of the new machine running in period. During the running in period, the machine is overloaded for a long time, which leads to the frequent occurrence of early faults of the machine, which not only affects the normal use of the machine, but also shortens the service life of the machine and affects the harm of the project progress.
Due to the influence of processing, assembly and adjustment of the new machine parts, the friction surface is rough, the contact area of the mating surface is small, and the pressure bearing condition of the surface is uneven. During the operation of the machine, the concave and convex parts on the surface of the parts are inlaid and rubbed with each other, and the metal debris grinded down as abrasives continue to participate in the friction, which accelerates the wear of the mating surface of the parts. Therefore, during the running in period, it is easy to cause the wear of parts (especially the mating surface), and the wear rate is fast. At this time, if the overload operation, it may lead to the damage of parts and early failure.
Due to the small fit clearance of the newly assembled parts, and due to the assembly and other reasons, it is difficult to ensure the uniformity of the fit clearance. The lubricating oil (grease) is not easy to form a uniform oil film on the friction surface to prevent wear. Therefore, the lubrication efficiency is reduced and the abnormal wear of the parts in the early stage is caused. When it is serious, it will cause scratch or bite on the friction surface of precision fit, which will lead to failure.
To sum up, we can not ignore the running in of the new machine in actual use.