Six mechanical failure of diesel engine
Diesel in the operation of rigid obstruction, ranging from fundamental pieces of causing damage, while in the production of turmoil caused by massive stiff. Typically environment, prevent the former diesel engine produces its speed, sound, exhaust, water temperature, oil pressure, etc. will show some great signs, that is, prevent warning feature. Yi Shi should be based on the operator to make an accurate harbinger of the characteristics of agile and decisive, strong and take steps, guard turmoil generated.
1, Speed, Speed characteristics impede the omen,the former, as usual the city appeared to take diesel engine blue smoke, burn oil or signs of speed instability.
Processing steps: First, stop the oil off the accelerator and depress the brake; the second is to plug into the trachea, into the atmosphere to intercept; third is to open high-pressure tubing to stop oil Minjie Song; four diesel engine is available in high gear heavy duty walking (brake) make the engine stall due to lack of air twist.
2, sticky-cylinder features prevent warning
Sticky-cylinder diesel engine, as usual in the water environment resulting tension, inability to stick cylinder before the engine is running, the water temperature gauge indicates exceed 100 °C, a few drops of cold water to the body, the “hissing” sound, and white smoke, water droplets are fast evaporation.
Processing steps: idle time or turn off the cooling funding shake the crankshaft, so that the water temperature dropped to 40 °C up and down, then slow to participate in the cooling water. Too small and do not immediately increase the engine cooling water, otherwise it will cause a sudden temperature fall due to local mechanical deformation or excessive give rise to cracks.
3 pound cylinder prevent warning feature
Pound cylinder is more destructive of rigid obstruction, in addition to causing pound cylinder valve off the tank, most of the connecting rod bolt loose back caused because of the connecting rod bolt loose or stretched back, the common engine connecting rod bearing clearance increases, then parts can be heard in the crankcase blah “percussion, percussion sound from small to large, end-link bolt completely off or broken connecting rod and bearing cap throw, breaking the body and related parts.
Processing steps: immediately downtime, load change conditions.
4, Burnt prevent warning feature
Suddenly something in the low engine speed, load increase, the engine black smoke, engine oil pressure to land, the crankcase have a “chirp” sound of dry friction.
Processing steps: immediately stop, confiscate connecting rod bearing cap removed, to identify reasons why, and maintenance changes.
5, off-axis characteristics impede the harbinger
When the diesel engine crankshaft axis at the shoulder due to Weidun have hidden cracks, prevent symptoms is not yet clear, with the increasing expansion of the crack, have kept the engine crankcase splash of percussion, percussion speed increase when you change the engine black smoke, and soon, percussion sound gradually increases, the engine generates jitter, crankshaft fracture, then turn off.
Processing steps: immediately stop raid warning invention, the invention should be promptly changed the crankshaft crack.
6, a precursor cylinder characteristics hinder
Intense black smoke exhaust and suddenly turn off, the crankshaft can not turn. Can not start the engine at this point things should be clear identification of reason and reason.
Processing steps:
1) Early Ming La made tank should first increase the fuel injection cylinder oil. No signs of overheating, such as changing the oil can be taken to stop single-cylinder, low speed, speed up the pace of the piston cooling, etc., until the heat eliminated.
2) When the Ming La made tank, the required agile low speed, then stop. Continuous growth of the piston cooling, at the same time drive car.
3) died as a result of the piston can not bite plate car, you should wait until the piston cooling for some time, re-jigger to make it active.
4) When the piston bite force than the tension in the death of the environment, it can inject kerosene to cylinder until the piston cooling leveraging flywheel or disk drive.
5) The confiscated crane cylinder when the engine piston and cylinder should pull on the appearance of traces of oil tank too small polished stone. Damaged piston rings must be replaced. If the tension between the piston and cylinder liner damage and should be replaced.
6) re-installed the piston, the cylinder must too small raids on the oiling of the injection hole is normal. If the piston cylinder are the friendly ones, then re-installed shall be held after the run, grinding timely start gradually from low-load increases the load and continuous operation.
7) If the cylinder does not allow social upheaval can not be repaired or repair, the engine cylinder can be taken to seal the essentials of continuous operation.