Analyze the abnormality, causes and treatment methods of generator sets

The valve of the diesel generator set will make an abnormal noise, and many customers are helpless to make it easier for everyone to self-check There are many abnormal noises generated during operation of the unit, and the valve can be adjusted according to the conditions. When operating a diesel the generator set and find problems in a timely manner. generator set , the valve has abnormal noise and the solutions are as follows:

Abnormal: The valve leakage sounds outside the valve room, which is more obvious at high load and low speed, and the sound increases with the increase of load;
Cause: When reaming the valve seat, due to improper operation or excessive wear of the valve conduit, the valve seat is skewed or the valve gap is small, resulting in valve ablation, causing the valve to close tightly and leak.
Treatment method: Remove the cylinder head, grind the valve, check the valve spring force, and readjust the valve clearance.

Abnormal: When the engine is running at idle, a continuous knocking sound occurs between the tail end of the valve stem and its driving member, which increases with the increase of the rotation speed. The sound does not change when the engine temperature changes or the fire breaks.
Reasons:
1. The adjusted valve clearance has changed (locking is not firm, wear between the valve stem and the drive part), and the valve has not been adjusted.
2. The valve adjustment screw is worn, the locking nut is loose, and the valve clearance is too large or inconsistent.
3. The valve spring seat is worn and the valve stem and the conduit are worn too much.
Treatment method: Re-adjust the valve clearance. If the locking nut on the adjustment screw is loose, it should be locked firmly and replace the seriously worn parts.

Abnormal: Valve spring breaking
treatment method: Replace.

Abnormal: The valve seat sounds, the seat race falls off
: the surface of the valve seat race is rough, the processing accuracy is unqualified, the interference of the race is improperly selected, the material selection is too large after being heated, or the valve seat is inadequate to the requirements.
Treatment method: Re-install the valve seat according to the assembly process requirements, the upper end surface is flush with the body plane, and the heightened part must be leveled.