大部分的機器設備一旦使用時間久了不可避免會出現各式的問題，比如說燃氣發電機冷卻水溫度高以及爆震現象的存在，這就要趕緊進行分析原因了，以防止發生隱患。下面來講講吧。

Once most of the machines and equipment have been used for a long time, various problems will inevitably occur, such as high cooling water temperature of gas generator and the existence of detonation phenomenon. Therefore, it is necessary to analyze the causes to prevent hidden dangers. Let's talk about it.

冷卻水溫度高

High cooling water temperature

現象：站控值班人員發現燃氣發電機水溫偏高，相關人員隨即赴現場對發電機組進行檢查，風扇等冷卻系統正常，控制面板無報警。半小時之后，上位機出現該燃氣發電機冷卻水溫度高報警， 進而造成停機。

Phenomenon: when the station control personnel on duty found that the water temperature of the gas generator was too high, relevant personnel immediately went to the site to inspect the generator set. The cooling systems such as fans were normal, and the control panel did not give an alarm. Half an hour later, the upper computer gave an alarm of high cooling water temperature of the gas generator, resulting in shutdown.

造成此次冷卻水溫度高原因分析：該燃氣發電機正常運行時冷卻水溫度在89℃左右，當負載有較大幅度的提升時，冷卻水溫度隨即上升，超過臨界值導致報警停機。

Cause analysis of the high cooling water temperature: the cooling water temperature of the gas generator is about 89 ℃ during normal operation. When the load is greatly increased, the cooling water temperature rises immediately, exceeding the critical value, resulting in alarm and shutdown.

其他原因分析：

Analysis of other causes:

（1）冷卻水管路存在結垢現象，導致冷卻水散熱不佳；（2）冷卻風扇電機損壞，導致散熱不佳；（3）節溫器卡住或者其他原因導致未打開；（4）冷卻水管路或者接頭處漏水，冷卻水自然損耗液位降低導致冷卻水缺失；（5）冷卻水溫度傳感器故障，導致檢測結果失準。

(1) Scaling of cooling water pipeline leads to poor cooling of cooling water; (2) The cooling fan motor is damaged, resulting in poor heat dissipation; (3) Thermostat is stuck or not opened due to other reasons; (4) There is water leakage in the cooling water pipeline or joint, and the natural loss of cooling water causes the loss of cooling water due to the decrease of liquid level; (5) The cooling water temperature sensor is faulty, resulting in inaccurate detection results.

爆震

knock

現象：現場控制屏出現“Knocking”故障報警信息。

Phenomenon: the "knocking" fault alarm message appears on the field control panel.

原因分析：

Cause analysis:

（1）氣缸燃燒室內積碳過多，容易在積碳表面形成高溫著火點；（2）點火提前角過于提前，導致點火引燃混合燃氣的時間早于活塞到達上止點的時間，從而在活塞壓縮沖程中壓力急劇升高導致爆燃的發生。

(1) There is too much carbon in the cylinder combustion chamber, which is easy to form high-temperature ignition points on the carbon deposition surface; (2) The ignition advance angle is too early, which causes the ignition time of the mixed gas to be earlier than the time when the piston reaches the top dead center, so the pressure rises sharply in the piston compression stroke, resulting in the occurrence of deflagration.

同時，爆燃產生的壓力作用于活塞，影響活塞的沖程，導致爆震現象；（3）燃氣發電機組冷卻水溫度過高導致發動機機體溫度高，散熱不良，產生高溫而發生爆震；（4）空燃比不正確等其他情況。

At the same time, the pressure produced by deflagration acts on the piston, affecting the piston stroke and leading to detonation; (3) Excessive cooling water temperature leads to high engine body temperature, poor heat dissipation, high temperature and detonation; (4) Other conditions such as incorrect air-fuel ratio.

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