It is winter and the weather and temperature are low. When using the natural gas generator unit, it is easy to crack and leak the cylinder head of the unit. What are the main reasons? How to prevent cylinder cracking when users use natural gas generator sets in winter?

1.天然氣發電機組運轉時，冷卻水不足或水箱開鍋機溫過高，突然加入冷卻水。

1. When the natural gas generator unit is running, the cooling water is insufficient or the boiling machine temperature in the water tank is too high, and the cooling water is suddenly added.

2.起動后我們才加入冷卻水，天然氣發電機組起動后，機內的溫度就會越來越高，如果這時加入冷卻水，汽缸體與汽缸蓋急劇冷卻，就會因冷縮而裂縫。

2. We only add cooling water after starting. After the natural gas generator set is started, the temperature in the machine will be higher and higher. If cooling water is added at this time, the cylinder block and cylinder head will cool sharply, and cracks will be caused by cold shrinkage.

3.天然氣發電機組長時間運轉，機內溫度高，停車后立即放掉高溫水。會導致高溫零件驟遇冷空氣而開裂。

3. The natural gas generator runs for a long time and the temperature in the generator is high. Drain the high-temperature water immediately after shutdown. It will cause high-temperature parts to crack suddenly when encountering cold air.

4.停機后，沒有放冷卻水。機內水凍結成冰，體積增大，發生汽缸體和汽缸蓋脹裂。

4. No cooling water was discharged after shutdown. The water in the machine freezes into ice, the volume increases, and the cylinder block and cylinder head expand and crack.

5.使用減壓機停機，使高溫的氣缸蓋突然遇到寒冷空氣而導致開裂。

5. Shut down the pressure reducer to make the high-temperature cylinder head suddenly encounter cold air and cause cracking.

防止各類汽缸體和汽缸蓋開裂有以下方法：

There are the following methods to prevent cracking of various cylinder blocks and cylinder heads:

1.起動天然氣發電機組前，應先給水箱加入溫熱水，嚴冬季節要灌注熱水2~3次，待放水閥中流出的水約30~50℃時起動為佳。

1. Before starting the natural gas generator set, warm hot water shall be added to the water tank. In severe winter, hot water shall be injected 2 ~ 3 times. It is better to start when the water flowing out of the drain valve is about 30 ~ 50 ℃.

2.發動機運轉時間較長時，停機后應等待半個小時左右，機溫下降到40~50℃時再放冷卻水。放完水后用細鐵絲捅通放水閥開關，防止沉淀物堵塞放水閥。

2. When the engine runs for a long time, wait for about half an hour after shutdown, and drain the cooling water when the engine temperature drops to 40 ~ 50 ℃. After draining, poke the drain valve switch with a fine iron wire to prevent sediment from blocking the drain valve.

3.天然氣發電機組運轉過熱嚴重缺水時，應讓柴油機低速空轉10~15分鐘，然后再慢慢加入冷卻水。

3. When the natural gas generator set is overheated and seriously short of water, let the diesel engine idle at low speed for 10 ~ 15 minutes, and then slowly add cooling water.