I. features of gantry crane 5 ton run-in period:
1, fast wear speed due to the new machine parts processing, assembly and adjustment and other factors, the friction surface rough, matching surface contact area is small, the surface pressure condition is uneven.During the operation of the machine, the concave and convex parts of the parts surface are interposed with each other to rub, and the metal debris that comes down is used as abrasive to continue to participate in the friction, which accelerates the wear of the parts' matching surface.Therefore, the running-in period is easy to cause parts (especially the surface) wear, wear speed.At this time, if overload work, may lead to damage, early failure.
2, poor lubrication due to the new assembly of parts with small clearance, and due to assembly and other reasons, it is difficult to ensure the uniformity of the clearance, lubricating oil (grease) is not easy to form a uniform oil film on the friction surface, to prevent wear.Thus reduces the lubrication efficiency, causes the early abnormal wear.In severe cases, the friction surface with precise fit will scratch or bite, leading to the occurrence of fault.
3, loose new processing and assembly of parts, there is the deviation of geometric shape and fit size, in the early use, due to impact, vibration and other alternating load, as well as the impact of heat, deformation and other factors, coupled with wear too fast and other reasons, easy to make the original fastening parts loose.
4, the occurrence of leakage phenomenon due to loose parts, vibration and the impact of heat machine, machine sealing surface and pipe joints, there will be leakage phenomenon;Part of the casting, processing and other defects, in the assembly debugging is difficult to find, but due to the vibration, impact effect in the process of operation, this defect is exposed, the performance is leakage (leakage) oil (water).Therefore, the run-in period is prone to leakage.
5, operating error due to the machine structure, performance of the understanding is not enough (especially the new operator), easy to cause failure due to operational error, or even cause mechanical accidents.
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