In addition, the radiator is an important component in the cooling water system, and it should be simulated to check whether the temperature controller is working properly.
The gas distribution system of the marine main engine includes a cam and a camshaft, a camshaft transmission mechanism, a valve drive mechanism and a valve mechanism.Its function is to discharge the exhaust gas after power work out of the cylinder to prepare for the next cycle to be filled with fresh air, and at the same time, it can improve the combustion rate of fuel.
The gas distribution system has an important influence on the performance of the marine main engine, so the operator should pay attention to the debugging and control of the gas distribution system, monitor the movement and force of each component, and analyze whether the length of the pipeline meets the standard to ensure the main engine gas distribution system. normal operation, thereby improving the comprehensive performance of the marine main engine.
Troubleshooting and Removal of Marine Main Engine
1. Fuel failure
(1) Oil road is not smooth
Poor oil circuit or air will lead to unstable speed and insensitive speed regulation of the marine main engine.
When this happens, the operator can loosen the air screw to remove the air, then check the actual position of the oil circuit, clean the filter, and replace it if necessary.
(2) Fuel leakage
Fuel leakage will not only cause waste of fuel, but also have certain safety hazards.
Therefore, the operator should pay attention to the usual inspection to prevent the occurrence of fuel leakage.
2. Cooler failure
(1) The cooler is blocked
The blockage of the cooler of the marine main engine will reduce its heat dissipation effect, which will lead to high oil temperature.
Therefore, the marine main engine operator should clean the radiator regularly, clear the blocked cooler in time, and then re-commission.
(2) The cooling water temperature is too high
Therefore, adjustments should be made in time, and if the amount of cooling water is insufficient, the cooling water should be replenished in time.
At the same time, the maintenance of the cooling system should be done well, to keep the ventilation and heat dissipation of the equipment operating environment, and to reduce the overload operation.
3. Supercharger failure
When the supercharger is in an abnormal working state, the discharge flow of the compressor is too small, the pressure fluctuates and causes large fluctuations in the machine, and a heavy wheezing sound is emitted, which in turn leads to a drop in power and supercharging. The operation effect of the engine is reduced, which has a negative impact on the operation of the marine main engine.
The operator should monitor the pressure and discharge flow of the supercharger, and pay attention to the changes in the vibration and sound of the machine.
4. Failure of the lubrication system
When the piston ring is glued or worn beyond the limit value, the fuel brand does not meet the regulations, and the fuel atomization is poor, it will cause problems in the lubrication system of the marine main engine.
Too thin lubricating oil will also reduce the lubricating effect; too thick lubricating oil will make the marine main engine unable to start or difficult to start.
When there is a failure of the lubricating system, it is necessary to check whether the oil inlet and filter in the lubricating oil system are blocked in time. If they are blocked, they should be cleared first.
Then check other equipment for leakage, stuck and other problems, and make repairs and replacements in time.
5. the main engine operation failure
During the operation of the marine main engine, sometimes the power is insufficient and the speed is reduced. The reasons for this failure may be the following three situations.
(1) Bearing heating
Excessive oiling is one of the important reasons for bearing heating.
Therefore, when the bearing of the marine main engine is hot, it should be checked whether the bearing box of the main engine is refueled according to the requirements of the manufacturer's instructions, and adjustments should be made in time.
(2) Piston bite cylinder
The phenomenon of piston bite in the marine main engine will increase the wear of the piston, reduce the service life of the main engine, and greatly increase the fuel consumption.
When this kind of failure occurs, you can first check and measure the gap between the piston and the cylinder, after knowing the actual position of the piston in the cylinder, make corresponding adjustments, and replace the new piston if necessary.
(3) The cylinder does not supply oil
Failure to supply oil to one or several cylinders will result in insufficient power and reduced speed of the marine main engine.
Therefore, the operator should monitor the amount of oil in the cylinder in time to prevent the phenomenon that the cylinder does not supply oil.
Troubleshooting and Monitoring of Marine Main Engines
1. Do various inspections before the host works
It can effectively reduce the incidence of accidents if the faults are found and repaired in time before the marine main engine works.
Therefore, the main engine operator should do a good job of various inspections before the marine main engine work, so as to prevent the small and progressive, in order to reduce the incidence of major failures.
2. Application host monitoring system
The 21st century is the era of information technology.
Increase the utilization of computer network technology, introduce and apply a novel main engine monitoring system, regulate and control the power plant of the freighter, and simulate human experts to diagnose the fault of the main engine of the ship. .
It is suggested to establish a marine main engine monitoring system to further improve the timeliness and accuracy of marine main engine failures.
The main engine is an important part of the ship, and the failure of the main engine will threaten the safety of the ship.
In order to ensure the normal operation of the marine main engine and prevent unexpected accidents, it is necessary to carry out debugging and troubleshooting in time.
Therefore, operators should actively explore main engine debugging and troubleshooting methods, and apply scientific monitoring methods to further improve the reliability and propulsion efficiency of marine main engines, prolong the service life of marine main engines and reduce maintenance costs.
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