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Home - News - New gantry cranes generally require a running-in period of about 60 hours

New gantry cranes generally require a running-in period of about 60 hours

November 17, 2021

New gantry cranes generally have a running-in period of about 60 hours, which is stipulated by the manufacturing plant according to the technical characteristics of the crane in the initial period of use. Anyway, the manufacturer has a warranty period. If the machine is broken, the manufacturer is responsible for repairing. Therefore, the machine is overloaded for a long time during the running-in period, resulting in frequent early failures of the machine. This not only affects the normal use of the machine, but also shortens the service life of the machine. , And because of the damage to the machine, the progress of the project was affected. Therefore, full attention should be paid to the use and maintenance of the gantry crane during the running-in period. Let me introduce to you the matters needing attention during the running-in period of the crane.

1. Many operating errors

Due to inadequate understanding of the structure and performance of gantry cranes, it is easy to cause malfunctions and even mechanical accidents due to operating errors.

2. Poor lubrication 

As the fitting clearance of newly assembled parts is small, and due to assembly and other reasons, it is difficult to ensure the uniformity of the fitting clearance, and it is difficult for lubricating oil to form a uniform oil film on the friction surface to prevent wear. Thereby reducing the lubrication efficiency, causing early abnormal wear of the machine parts. In severe cases, it will cause scratches or seizures on the friction surface of the precision fit, leading to failures.

3. Loosening occurs

Newly processed and assembled parts have deviations in geometric shapes and matching dimensions. In the early stage of use, due to the impact of alternating loads such as impact and vibration, as well as the influence of factors such as heat and deformation, and excessive wear and other reasons, they are easy to cause The originally fastened parts are loose.

4. Leakage occurs  

Due to the loosening, vibration and heating of the machine, there will be leakage in the sealing surface and pipe joints of the machine; some defects such as casting and processing are difficult to find during assembly and debugging, but due to vibration during operation , Impact, this defect is exposed, manifested as oil leakage. Therefore, leakage is prone to occur during the running-in period.

5. Fast abrasion speed 

Due to the influence of factors such as the processing, assembly and adjustment of new machine parts, the friction surface of the crane is rough, the contact area of the mating surface is small, and the surface pressure is uneven. During the operation of the machine, the uneven parts on the surface of the parts fit and rub each other, and the metal scraps that fall off are used as abrasives to 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 the parts, and the wear rate is fast. At this time, if overloading is performed, parts may be damaged and early failures may occur.