如何防止气门头部断裂 How to prevent valve head breakage

扬州海弘柴油发电机组解析气门断裂的原因，有以下几点：

  1．本身在加工和热处理过程中产生裂纹；

　 2．气门座扭曲，使气门承受弯曲应力；

　　3．由于气门碰活塞、气门机构传动件运动不当或间隙不合适而产生冲击；

　　4．气门头部温度分布不均匀而产生热应力。

为了防止气门早期磨损、烧损及断裂，应注意以下几个方面：

　 1．严格控制气门机构的润滑油量，过多易生成积炭，过少则会加速磨损。

　　2．气门座、气门及气门导管应严格保证同心。

　　3．正确调整气门间隙，防止气门碰活塞。

　　4．严格控制冷却水温度，改善柴油机的冷却效果。

The reasons for valve fracture in Yangzhou Haihong diesel generator set are as follows:

1. Cracks are generated during processing and heat treatment;

2. The valve seat is twisted, causing the valve to bear bending stress;

3. Impact caused by valve collision with piston, improper movement of valve mechanism transmission components, or inappropriate clearance;

4. Uneven temperature distribution at the valve head results in thermal stress.

To prevent early wear, burning, and fracture of valves, the following aspects should be noted:

1. Strictly control the amount of lubricating oil in the valve mechanism. Too much can easily generate carbon deposits, while too little can accelerate wear.

2. The valve seat, valve, and valve guide should be strictly ensured to be concentric.

3. Adjust the valve clearance correctly to prevent the valve from touching the piston.

4. Strictly control the temperature of the cooling water to improve the cooling effect of the diesel engine.