What Are the Precursors of Diesel Generator Before Failure

In the process of using the diesel generator set, it is inevitable that large and small faults will occur. When some major faults occur, there are generally some precursors. All users should take corresponding measures to avoid the occurrence of faults as far as possible. The following Dingbo Power to introduce you to the electric generator in a major failure before the general will appear some precursors.

1. The precursor of diesel generator set valve dropping.

The valve falling into the cylinder is usually caused by valve stem breaking, valve spring breaking, valve spring seat cracking and valve lock clip falling off.When the cylinder head makes "Dangdang" knocking sound (the piston touches the valve), "chug" friction sound (the piston touches the valve) or other abnormal sound, and the engine works unsteadily, it is often the precursor of the valve dropping. At this time, stop the engine immediately, or the piston, cylinder head and cylinder liner will be damaged, or even the connecting rod will be bent, the engine body will be broken, and the crankshaft will be broken.

2. Precursor of cylinder sticking of diesel generator set.

Cylinder sticking usually occurs when the diesel generator unit is seriously short of water. Before the cylinder sticking, the engine runs weakly and the water temperature gauge indicates that it is over 100 ℃. Dropping a few drops of cold water on the engine body makes a "hissing" noise and emits white smoke. The water drops evaporate quickly. At this time, the engine should be allowed to run at low speed or idle speed to reduce the vehicle temperature. If the engine is stopped immediately, the piston and cylinder liner will stick to the cylinder.

3. The premonition of diesel generator set's Bush burning.

During the operation of the diesel generator set, the speed suddenly decreases, the load increases, the engine emits black smoke, the oil pressure drops, and the dry friction sound of "chirp" is emitted in the crankcase, which is the precursor of tile burning.In this case, stop the engine immediately, otherwise it will further aggravate the wear of the bearing bush, the scratch on the surface of the journal will expand rapidly, the bearing bush and the journal will soon stick together, and the engine will shut down.

4. The precursor of diesel generator set ramming cylinder.

The tamping cylinder is a destructive mechanical failure, which is mainly caused by the loosening of connecting rod bolts, except for the tamping cylinder caused by valve dropping.After the connecting rod bolt is loosened or stretched, the fit clearance of connecting rod bearing increases. At this time, a "click" sound can be heard in the crankcase. The knock sound changes from small to large. Finally, the connecting rod bolt completely falls off or breaks, and the connecting rod and bearing cover are thrown out, breaking the body and related parts.

5. The precursor of diesel generating set "flying".

Before "flying", the diesel generator set will generally emit blue smoke, burn oil or speed instability. At the beginning, the speed of the diesel generator set is not controlled by the throttle, it rises rapidly until it exceeds the rated speed, and the engine emits a lot of black smoke or blue smoke.At this time, if we don't take measures to stop it, such as cutting off the oil, gas and pressure, the engine speed will continue to rise and roar, the exhaust pipe will be filled with smoke, and the speed will be out of control, which will cause major accidents such as cylinder tamping.

6. The precursor of flywheel breaking of diesel generator set.

When the flywheel has hidden cracks, knocking with a hand hammer will produce a hoarse sound. When the engine is working, the flywheel will produce a knocking sound. When the speed changes, the sound will increase and the engine will shake. At this time, if you do not stop the machine for inspection, it is easy to cause the flywheel suddenly broken, debris flying out, and other malignant accidents.

7、 The precursor of shaft breaking of diesel generator set.

When the recessive crack is produced at the shoulder of Crankshaft Journal of diesel generator set due to fatigue, the fault symptom is not obvious. With the expansion and aggravation of the crack, there is a dull knocking sound in the engine crankcase. When the speed changes, the knocking sound increases, and the engine emits black smoke. Soon, the knocking sound gradually increases, and the engine shakes, the crankshaft breaks, and then the engine fires. Therefore, when there is abnormal noise in the engine crankcase, it should be stopped immediately for inspection.

The above are some precursors of diesel generator set sorted out by Dingbo power before major failure. I hope the majority of users can remember them by heart. If the above phenomenon occurs, users must be vigilant, stop the machine in time to check the failure, and take preventive measures. If you want to know more, please contact us by email dingbo@dieselgeneratortech.com.