沼氣發(fā)電機(jī)組在以下情況下需要進(jìn)行大修：

　　The biogas generator set needs to undergo major repairs in the following situations:

　　1. 燃油和機(jī)油消耗顯著增加：柴油機(jī)的燃油和機(jī)油耗量顯著增加，現(xiàn)象是冒黑煙。

　　1. Significant increase in fuel and oil consumption: The fuel and oil consumption of diesel engines has significantly increased, with the phenomenon of emitting black smoke.

　　2. 工作無(wú)力：柴油機(jī)工作無(wú)力，加速后轉(zhuǎn)速顯著下降，不穩(wěn)，聲音突變，排氣冒黑煙。

　　2. Work fatigue: The diesel engine works weakly, with a significant decrease in speed after acceleration, instability, sudden sound changes, and black smoke emissions from the exhaust.

　　3. 啟動(dòng)困難：柴油機(jī)在常溫下啟動(dòng)困難，運(yùn)行過(guò)程中曲軸軸承、連桿軸承和活塞銷有敲擊聲。

　　3. Difficulty in starting: Diesel engines have difficulty starting at room temperature, and there are knocking sounds from the crankshaft bearings, connecting rod bearings, and piston pins during operation.

　　4. 部件磨損嚴(yán)重：柴油機(jī)內(nèi)部缸套、活塞環(huán)磨損嚴(yán)重，氣缸橢圓度、錐度，活塞與氣缸之間的間隙，曲軸軸頸和連桿軸頸的橢圓度超過(guò)規(guī)定的極限。

　　4. Severe component wear: The cylinder liner and piston ring inside the diesel engine are severely worn, and the cylinder ovality and taper, clearance between the piston and cylinder, and ovality of the crankshaft journal and connecting rod journal exceed the specified limits.

　　5. 氣缸壓力不足：柴油機(jī)在溫度正常時(shí)，氣缸壓力達(dá)不到規(guī)定壓力的70%。

　　5. Insufficient cylinder pressure: When the temperature is normal, the cylinder pressure of the diesel engine cannot reach 70% of the specified pressure.

　　6. 長(zhǎng)期運(yùn)行后：一般普通機(jī)組大修周期在10000-12000小時(shí)左右，而某些高質(zhì)量的沼氣發(fā)電機(jī)組大修周期在24000小時(shí)以上。

　　6. After long-term operation: Generally, the overhaul cycle of ordinary units is around 10000-12000 hours, while the overhaul cycle of some high-quality biogas generator units is over 24000 hours.

　　大修通常包括對(duì)發(fā)電機(jī)組所有部件的清洗，包括冷卻系統(tǒng)、燃料系統(tǒng)、電纜和接線板等，并在完成后進(jìn)行全面的測(cè)試和調(diào)整，確保發(fā)電機(jī)組的性能符合標(biāo)準(zhǔn)。如果出現(xiàn)上述情況，建議聯(lián)系專業(yè)技術(shù)人員進(jìn)行檢查和大修工作。

　　Overhaul usually involves cleaning all components of the generator set, including the cooling system, fuel system, cables, and terminal blocks, and conducting comprehensive testing and adjustments after completion to ensure that the performance of the generator set meets standards. If the above situation occurs, it is recommended to contact professional technicians for inspection and overhaul work.

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