The run-in period is an important part of guaranteeing the normal operation of the small roller, reducing the defect rate, and extending its service life. However, at present, some users ignore the special skills needs of the new aircraft during the run-in period because they are short of knowledge about the use of roller or because of the tight schedule, or they want to make a profit quickly. Some users even think that there is a repair period for manufacturers and manufacturers. The machine is broken and repaired by the manufacturer. Therefore, the machine is overloaded for a long period of time during the running-in period, resulting in frequent occurrence of early machine troubles. This not only affects the normal operation of the machine, but also The service life of the machine is shortened, but also because the machine damage affects the progress of the project. Therefore, the application and protection of the running-in period of small hand rollers should attract sufficient attention.
First, the characteristics of the run-in period
1, The wear rate is fast: The impact of installation and adjustment factors, the appearance of the conflict is rough, the contact area of ​​the cooperative surface is small, and the pressure on the external surface is uneven. During the operation of the machine, the concave and convex parts of the external parts of the machine partially interfered with each other. The scraped metal scraps continued to participate in the conflict as abrasives, accelerating the wear of the parts' cooperative appearance. As a result, the wear of the simple components (especially the cooperative appearance) during the break-in period is fast. At this time, if it is overloaded, damage to the parts can occur, and early problems can occur.
2, Bad smoothness: Because the newly-installed components have a small cooperation gap, and because of reasons such as installation, it is difficult to guarantee the uniformity of the cooperation gap. The smooth oil (fat) is not easy to form a uniform oil film on the surface of the collision to hinder the wear. The drop in smoothness then constitutes an early abnormal wear of the parts. When it is severe, it will constitute a fine-cooperative conflict and the appearance of scratches or occlusions will cause the onset of problems.
3, loosening of the attack: the new processing and installation of parts and components, there are a number of errors in the shape and cooperation scale, in the initial application, due to the impact load, vibration and other alternating load, and heat, deformation and other factors, coupled with excessive wear and tear The reason is that the parts that were originally fastened are loosened.
4, Seizure and appearance of leakage: Because the loose parts and vibrations of the machine and the heat of the machine are affected, the machine's sealing surface and pipe joints will show leakage appearance. Some casting and machining defects are difficult to find during installation and debugging, but because In the process of operation, the vibration and impact effects are exposed and the leakage (permeation) of oil (water) is manifested. Therefore, the appearance of leakage is simply presented in the running-in period.
5, Mistakes in operation: Because the machine's layout and functions are not known enough (especially new operators), simply because of mistakes in the operation, it causes problems, and even causes mechanical problems.
Second, the application and protection of the run-in period
1, because the construction machinery is a special vehicle, the operator should bear the manufacturer's training, counseling, have ample knowledge of the layout and function of the machine, and obtain certain operation and protection experience before operating the machine. The “product protection manual” provided by the manufacturer is an essential material for the operator to operate the equipment. Before operating the machine, it is necessary to first read the “application protection manual” and perform operation and protection according to requirements.
2. Pay attention to the work load during the run-in period. Do not exceed 60% of the additional work load during the run-in period and organize the appropriate work load to avoid the onset of overheated scenes caused by the machine's continuous operation for a long time.
3, pay attention to often investigating the appearance of the instructions, showing abnormalities should be promptly parked to be removed, in the cause has not been found, the problem should not be removed before the suspension of operations.
4, pay attention to often check the smooth oil, hydraulic oil, coolant, brake fluid and fuel oil (water) position and quality, and pay attention to see the machine's tightness. In the inspection, it was found that the oil and water were too short and should be analyzed. Together, the smoothness of each smooth point should be strengthened, and it is advocated that during the break-in period, each class must be smooth greased (especially outside).
5, Adhere to machine hygiene and adjust and tighten loose parts in time to prevent the components from wearing out or parts missing due to loosening.
6, After the run-in period is over, the machine shall be subject to forced protection, to make a good job of checking and adjusting operations, and to pay attention to the replacement of the oil.
In general, the need for application of protection during the run-in period of the roller can be summarized as: strengthening training, lightening the load, focusing on viewing, and strengthening smoothness. Just focus on and demand the protection and protection of the road roller during the run-in period, which will reduce the onset of the early problems, extend the life span, and improve the operating power. The machine does not bring you more benefits.