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Four Common Maintenance Methods For Diesel Generators

Mar. 29, 2022

When considering the failure of power generation equipment, dismantling should be avoided as much as possible. Blindly dismantling the unit, or easy dismantling due to confusion and luck, will not only prolong the elimination time of the failure problem, delay the use, but also cause undue damage or new failure problems. Starlight Power recommends that users only use it as a last resort after careful consideration.

 

Generally speaking, through a comprehensive inspection and careful consideration of the power generation equipment, after the possible causes of the failure of the power generation equipment are initially identified, starting from the main cause of the failure problem, the scope of the failure problem is gradually narrowed, so as to eliminate the failure quickly and accurately. Therefore, this step is the key to eliminating the entire failure process. In long-term practice, most users and maintainers have accumulated and created many valid judgments. Simple and practical judgments, methods of eliminating faults, and main methods of repairing generator set faults are as follows.

 

1. In the process of considering the fault of the isolation power generation equipment, in order to observe the change of the fault phenomenon or make the fault phenomenon more obvious, it is usually necessary to stop or partition a certain part or system intermittently to judge the component or component of the fault problem. A common method of cylinder deactivation when considering engine failure is a zoning method. That is, stop the multi-cylinder cylinder oil supply, check the cylinder, or distinguish whether the fault problem is local or common according to the change of the fault problem. For example, if intermittent black smoke is found in the exhaust, the cylinder is stopped, the fault problem disappears, and the fault part in the cylinder should be further considered. If each cylinder is broken, the failure problem does not change significantly, the failure problem is not the individual cylinder failure problem, and the cause that affects the cylinder's work should be found out. When considering circuit faults, the circuit fault method can also be used to narrow the fault range.

 

2. Comparison method When considering the failure of the unit, if there is any doubt about a certain part, it can be replaced with a spare part or with the same part. According to the change of the fault phenomenon, it is judged whether the component has a fault problem, or the component where the fault problem occurs is determined. For example, when the injector of the second cylinder of the diesel engine is considered to be faulty, the adjusted injector of the same model can be replaced. If the fault problem is eliminated, the injector installed on the second cylinder is faulty. If the failure problem does not disappear, it indicates that the failure problem is caused by other reasons. In an electrical circuit, if you think there is something wrong with a component (like a resistor, capacitor, etc.), you can replace the circuit with a good component. If the fault problem is eliminated, it is considered correct.

 

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3. If the internal combustion engine has a fault problem, the fault problem may change at the moment when the internal combustion engine speed rises or falls. When observing the failure problem, the appropriate speed should be selected to make the failure problem more prominent. Generally speaking, due to the low speed of the internal combustion engine, the failure problem phenomenon lasts for a long time and is easy to observe, so it is operated more at low speed. For example, the valve train of an internal combustion engine can cause a "dadada" rattling sound due to excessive valve clearance. Such methods can be eliminated immediately. When analyzing and judging the faults of each part of each system of the internal combustion engine, many specific methods can also be adopted according to their respective characteristics. For example, when checking the oil circuit of the fuel supply system of the internal combustion engine or the circuit of the electrical equipment, the fault problem can be checked step by step according to the system stage, so that the fault problem can be isolated in the smallest possible area. When checking, firstly check the parts that are most prone to failure and their corresponding parts, and then carefully check the faulty parts (faulty parts) according to the specific situation. After troubleshooting, enter the test machine to compare and check the working conditions of the unit to determine whether the fault can be completely eliminated.

 

4. The confirmation method adopts tentative disassembly of some faulty parts or components of the engine. Adjustment and other measures are used to observe changes in the phenomenon of failure problems to confirm whether the conclusions considered in failure problems can conform to the actual situation, or as a frequently used method to make up for the inability to determine failure problems due to lack of experience. When several abnormal phenomena with different causes occur at the same time, or the cause of the failure problem is related to improper adjustment, it is often difficult to distinguish the cause of the failure problem. In this case, the confirmation method can also get better results. For example, it is considered that the wear of the cylinder liner is serious, which is caused by the poor compression of the cylinder, and a small amount of oil (about 4~5g) can be filled into the cylinder. If the compression force increases, it means that it is considered to be true and effective. Another example is that the diesel engine emits black smoke. It is believed that the fuel supply is too large. It is also possible to tentatively reduce the fuel supply to confirm whether it is true and effective. When taking tentative measures, the principle of "less disassembly" should be followed to avoid disassembling the assembly at will. Whether it is exploratory disassembly or adjustment, it must be restored to normal working condition to ensure that it will not cause adverse consequences. In addition, dismantling and adjusting several parts or the same part at the same time should be avoided to prevent mutual influence and cause misjudgment.

 

Founded in 1974, Jiangsu Starlight Electricity Equipments Co.,Ltd. is a wholly-owned subsidiary of Jiangsu Starlight Power Group. It is one of the earliest manufacturers of generator sets in China. Starlight Power has 64 sales and service departments, which provide users with long-term technical advice, free debugging, free maintenance, and free training services. Looking forward to your inquiry, for more details, please contact us with sales@dieselgeneratortech.com


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