Common faults of diesel engines

1 cylinder liner failure
In a diesel engine, there is a cylindrical device similar to a cup in the cylinder block hole of the main engine. This device is the cylinder liner. According to different forms, there are three types of cylinder liners: thousand type, wet type and airless. During operation, a closed cylinder liner working space is formed between the cylinder liner and the cylinder head, and under the action of air pressure, the piston reciprocates in the cylinder, so that the function of the cylinder can be exerted. During this process , Many systems will be involved, which also leads to it becoming a part of the diesel engine that is prone to failure. The most common failure of the cylinder liner is cylinder liner cavitation. During the operation of the diesel engine, the piston needs to move repeatedly, so that the temperature inside the cylinder continues to rise. At this time, the pressure between the inside and outside of the cylinder liner will be unbalanced. If the piston is prone to continuous impact on the surface of the cylinder liner during its movement, it may cause the metal outside the cylinder liner to fall off, resulting in cavitation of the cylinder liner, which will cause the cylinder liner system to fail to operate normally. Cause the diesel engine to malfunction or even stop running.
2 Sliding bearing failure In diesel engines, the sliding bearing is an important structure and the most prone to failure parts in the system. In the diesel engine, the sliding bearing plays a pivotal role. During the operation of the diesel engine, the sliding bearing keeps moving all the time. During the continuous operation of the sliding bearing, it needs to be lubricated with clean lubricating oil to reduce friction, but If the lubricating oil added is not pure enough and there are foreign objects, it will cause grooves on the other side of the bearing bush of the sliding bearing, which will greatly affect the life of the sliding bearing and cause it to be prone to the problem of termination of operation: at the same time, during the operation of the sliding bearing , the bearing components are constantly worn out, and this kind of loss is irreversible. After a long time of operation, there will be serious wear and tear. If the maintenance personnel do not find the problem in time, or replace the seriously worn parts in time If it is dropped, the sliding bearing may deflect, even crack or break the shaft, which will directly affect the stability of the diesel engine and seriously affect the operation of the corresponding machinery.
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