Effective Countermeasures for Maintenance of Marine Diesel Engines

1 Maintenance of cylinder liner failure
Cylinder liner cavitation is a common fault of diesel engines, so it is of great significance to strengthen the research on its fault strategy. Through the analysis of the causes of cylinder liner faults, it is considered that the following measures can be taken to repair its cavitation fault engine D. Apply closed cooling method ,By using cold water to control the temperature, the temperature is controlled within a constant range, in this way to make the thermal expansion coefficient of the mechanical parts appropriate, thereby preventing the problem of cylinder liner cavitation.
2 Add emulsified oil and other preservatives to the coolant of the diesel engine. After adding the anti-corrosion agent, a protective film can be formed on the surface of the cylinder liner to protect the surface of the cylinder liner, thereby reducing the problem of cylinder liner cavitation 3 In the maintenance process of the cylinder liner, the physical reaction between cold water and cold water can be used to replace the temperature difference between cold and hot, so as to prevent the failure of the cylinder liner.
2 Maintenance of sliding bearing failure
Through the analysis of the cause of the sliding bearing failure, the quality of the diesel engine lubricating oil used in the maintenance of the sliding bearing failure should be ensured. After the sliding bearing fails, if the problem is serious, the sliding bearing needs to be replaced directly. When replacing the new bearing, the maintenance personnel need to conduct a comprehensive inspection of the lubricating oil to ensure that it is clean and pollution-free. If the oil is polluted, it cannot be used, and it needs to be replaced with clean lubricating oil without pollution, so as to prevent the damage of the new bearing due to the problem of lubricating oil. If through detection, physical experiment and dynamic observation, etc., it is confirmed that the failure of the sliding bearing can continue to be used after maintenance, and maintenance, welding maintenance, etc. can be applied. Refill the bearing bushing and spray to repair the bearing so that it can continue to be used, reducing the waste of resources and economic costs.
3 Maintenance of “Three Filters” Faults In order to prevent oil extraction machine failures caused by air pollutants, diesel impurities and oil impurities, it is necessary to install filters in a targeted manner. By installing air filters, diesel filters and oil filters Cleaner and other methods to filter various impurities to prevent these impurities from causing failure. During the installation process of air filter, diesel filter and oil filter, it is necessary to pay attention to the control of the installation position. For example, when controlling the air filter, it is necessary to correspond the positions of each component one by one, so as to avoid the wrong position of installation. During the installation process, it is also necessary to install rubber rings at both ends of the paper filter element and the screws that fix the air filter cannot be tightened too tightly to avoid excessive pressure on the surface of the filter due to excessive tightening of the screws , resulting in deformation of the filter surface. In addition, it is necessary to regularly maintain the air filter, diesel filter, and oil filter. The main measure is to clean the filter element of the filter and clean the dirt on the rubber ring. When installing the filter element, it is necessary to ensure a good seal between the filter element and the object.