Running-in of generator sets is a necessary measure to extend service life. Mechanical assembly and main friction pair components such as cylinders and pistons, piston rings, crankshaft journals and bearings inevitably have geometric shape errors (positional accuracy errors), as well as surface micro unevenness (protrusions and dents formed by machining marks). Therefore, the actual contact area of the two matching parts is small, while the load per unit area is large, resulting in severe friction and wear. In addition, due to the micro unevenness of the surface of the parts, it is not easy to form an oil film (damaged by convex peaks), which exacerbates wear. If the machine is operated at high speed and high load, the convex peaks on the surface of the friction pair parts will be severely scratched or torn, and metal chips will become abrasives, exacerbating wear. In severe cases, it causes local high-temperature melting to become dissolution wear, resulting in cylinder pulling and tile burning. In fact, due to the rough surface of the parts, the power consumed by friction is relatively high, and at this time, the high load operation of the machine is equivalent to overload. As a result, it also exacerbates component wear.

發(fā)電機組磨合期較長，而初期磨合階段磨損量較大，因此，此階段一般以工廠內進行，通過合理的磨合規(guī)范進行磨合，以減少磨損量，延長使用壽命，同時通過磨合期可以用來檢查和調整機的裝配質量和性能參數(shù)，以及運行中出現(xiàn)的問題，以便及時排除，使機質量和性能達到規(guī)范的要求。

The running-in period of the generator set is relatively long, and the initial running-in stage has a large amount of wear. Therefore, this stage is generally carried out in the factory through reasonable running-in specifications to reduce wear and prolong service life. At the same time, the running-in period can be used to check and adjust the assembly quality and performance parameters of the machine, as well as problems that occur during operation, in order to eliminate them in a timely manner and ensure that the quality and performance of the machine meet the requirements of the specifications.

新的或經(jīng)大修后的發(fā)電機組，在正式使用前須經(jīng)60h磨合運轉，方可投入全負荷使用，以改善機各運動部件的工作狀況，提高機的運行可靠性和使用壽命。磨合應視機用途和拖載方式的不同，來考慮具體磨合方案。原則上隨著磨合時間的增加，分階段逐步提高機的轉速和負載，在整個磨合期內負荷以12h標定功率的50%~80%為宜，轉速應不大于標定轉速的80%為好。但在磨合的開始階段，空運轉或過小負載情況下的運轉時間不宜過長。每當修理更換過缸套、活塞、活塞環(huán)、連桿軸瓦和曲拐等零部件后，亦應按上述磨合工況適當進行短期磨合。

New or overhauled generator sets must undergo 60 hours of running in before they can be put into full load use, in order to improve the working conditions of various moving components, improve the operational reliability and service life of the machine. The specific running-in plan should be considered based on the different uses and towing methods of the machine. In principle, as the running in time increases, the speed and load of the machine should be gradually increased in stages. During the entire running in period, the load should be 50%~80% of the rated power for 12 hours, and the speed should not exceed 80% of the rated speed. However, at the beginning of the running-in stage, the operating time should not be too long when idling or under small loads. Whenever cylinder liners, pistons, piston rings, connecting rod bearing shells, and cranks have been repaired and replaced, short-term running-in should also be carried out according to the above running-in conditions.

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