How To Use The New Crane Purchased?

How To Use The New Crane Purchased?
 

After the 50 ton overhead crane leaves the factory, it is generally stipulated that there is a run-in period of about 60 hours, which is stipulated by the manufacturing plant based on the technical characteristics of the crane at the initial stage of use. The run-in period is an important link to ensure the normal operation of the crane, reduce the failure rate and prolong its service life.
 

But at present, some users ignore the special technical requirements of the new machine's run-in period due to lack of common knowledge of crane use or because of tight construction schedules or want to get benefits as soon as possible.

Some users even think that, anyway, the manufacturer has a warranty period, and the manufacturer is responsible for repairing the machine if it breaks down, so the machine will be overloaded for a long time during the run-in period, resulting in frequent early failures of the machine, which not only affects the normal use of the machine , which shortens the service life of the machine, and also affects the progress of the project due to machine damage.
 

Therefore, the use and maintenance of the crane's run-in period should be given full attention.
 

1. The characteristics of the run-in period:
 

(1) Fast wear rate
 

Due to the influence of factors such as processing, assembly and adjustment of 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 fit and rub against each other, and the metal debris that falls off from the grinding is used as an abrasive to continue to participate in the friction, which accelerates the wear of the mating surface of the parts.
 

Therefore, during the break-in period, it is easy to cause wear of parts (especially mating surfaces), and the wear speed is fast. At this time, if the work is overloaded, it may cause damage to parts and cause early failure.
 

(2) Poor lubrication
 

Due to the small fitting clearance of newly assembled parts, and due to assembly and other reasons, it is difficult to ensure the uniformity of the fitting clearance, and the lubricating oil (grease) is not easy to form a uniform oil film on the friction surface to prevent wear. Thereby reducing the lubrication efficiency and causing early abnormal wear of parts.
 

In severe cases, it will cause scratches or bites on the friction surface of the precision fit, resulting in failure.
 

(3) Looseness occurs
 

Newly processed and assembled parts have deviations in geometric shape and matching dimensions. In the initial stage of use, due to the impact of alternating loads such as shock and vibration, as well as the influence of factors such as heat and deformation, and excessive wear and tear, it is easy to use Originally fastened parts become loose.
 

(4) Leakage occurs
 

Due to the looseness of parts, vibration and the influence of machine heat, leakage will occur on the sealing surface of the machine and pipe joints; some defects such as casting and processing are difficult to find during assembly and debugging, but due to the vibration during operation , Impact action, this defect is exposed, manifested as leakage (seepage) oil (water). Therefore, leakage is prone to occur during the run-in period.
 

(5) Many operating errors
 

Due to insufficient understanding of the structure and performance of the machine (especially for new operators), it is easy to cause malfunctions or even mechanical accidents due to operational errors.
 

2. The use and maintenance of the run-in period
 

(1) Since the 50 ton overhead crane is a special vehicle, the operator should receive training and guidance from the manufacturer, have a full understanding of the structure and performance of the machine, and obtain certain operating and maintenance experience before operating the machine.
 

The product use and maintenance manual provided by the manufacturer is the necessary information for the operator to operate the equipment. Before operating the machine, be sure to read the use and maintenance manual, and operate and maintain according to the requirements of the manual.
 

(2) Pay attention to the work load during the run-in period. Generally, the work load during the run-in period should not exceed 80% of the rated work load, and an appropriate workload should be arranged to prevent overheating caused by long-term continuous operation of the machine.
 

(3) Pay attention to frequently observe the indications of the instruments. If any abnormality occurs, stop the machine in time to eliminate it. Before the cause is found and the fault is not eliminated, the operation should be stopped.
 

(4) Pay attention to frequently check the level and quality of lubricating oil, hydraulic oil, coolant, brake fluid and fuel oil (water), and check the tightness of the whole machine. During the inspection, it is found that there is too much lack of oil and water, and the reason should be analyzed.
 

At the same time, the lubrication of each lubrication point should be strengthened. It is recommended that during the run-in period, grease should be added to the lubrication points every shift (except for special requirements).
 

(5) Keep the machine clean, adjust and fasten loose parts in time to prevent parts from being worn or lost due to looseness.
 

(6) At the end of the run-in period, the machine should be subject to mandatory maintenance, inspection and adjustment, and attention should be paid to the replacement of oil.
 

In short, the requirements for the use and maintenance of the crane during the run-in period can be summarized as: strengthen training, reduce load, pay attention to inspection, and strengthen lubrication.
 

As long as you pay attention to and implement the maintenance and maintenance of the crane run-in period according to the requirements, the occurrence of early failures will be reduced, the service life will be prolonged, the operating efficiency will be improved, and the machine will bring you more benefits.