Typically, the button under the key of a gasoline generator is designed as a shutdown button.
In addition to flash ignition, engines with too high a compression ratio can also face another problem: surface ignition. This is another type of abnormal combustion (also called hot ignition or pre-ignition) caused by the ignition of the mixture between hot surfaces and hot places in the cylinder (such as the exhaust valve heads , spark plug electrodes and carbon deposits). When shallow ignition occurs, it is also accompanied by a loud knocking noise from the cylinder (which is dull). The high pressure generated will increase the engine load and shorten the service life.
Gasoline generators are generally composed of stators, rotors, end covers, bearings and other components. The engine is a machine qui converts chemical energy into mechanical energy. Its conversion process is actually the work cycle process, it burns the fuel in the cylinder to generate kinetic energy, which drives the piston of the engine cylinder to reciprocate. It drives the connecting rod connected to the piston and the crank connected to the connecting rod to reciprocate in a circular motion around the center of the crankshaft to produce power.
The stator consists of the stator core, wire windings, machine base and other structural parts that secure these parts. The rotor is composed of rotor core winding (or magnetic pole, magnetic yoke), retaining ring, center ring, slip ring, fan and a rotating shaft. The stator and rotor of the generator are connected and assembled by the bearings and end covers, so that the rotor can rotate inns the stator and carry out the cutting movement of the magnetic lines of force, thus generating an induced electric potential, which is evacuated. across the terminals and connected in the circuit to generate current.
In addition to flash ignition, engines with too high a compression ratio can also experience another problem: surface ignition. This is another type of abnormal combustion (also called hot ignition or pre-ignition) caused by the ignition of the mixture between hot surfaces and hot places in the cylinder (such as the exhaust valve heads , spark plug electrodes and carbon deposits). When shallow ignition occurs, it is also accompanied by a loud knocking noise from the cylinder (which is dull). The high pressure generated will increase the engine load and shorten the service life.
Sawai Generator Tips: This situation is mainly caused by ISPt your generator may be overloaded!
Causes of chimney fires in gasoline generators
Chimney fires in gasoline engines are usually caused by unburned fuel or oily deposits coming out of the chimney as well as high temperature gases. It is caused by the recombustion of air, that is, the continuation of the fuel combustion process in the cylinder. Let's take a look at the detailed explanation from generator accessory manufacturer Sardon.
1. Sparks formed by burning oil mist are difficult to detect during the day. Small, short light pink sparks can be seen coming out of the chimney. Most of the sparks go out in the stream of smoke that follows them, without any scale or black particles falling. This situation often occurs when the gasoline engine is overloaded, as the fuel spray dans some cylinders is poor or the air supply to the cylinder is insufficient. The fuel injected into the cylinder cannot be completely burned and there is excessive oil mist or fine oil droplets. in the cylinder are evacuated by the high temperature. When gas is fed directly out of the chimney, it burns when it encounters oxygen.
2. Sparks formed by burning residual oilThe shape is slightly longer than above and the color is slightly darker. It shoots into the sky from the chimney and drifts with the wind before dying out, releasing fine particles of carbon and soot. This usually occurs when some injectors in a gasoline engine drip oil or have poor combustion during low load operation. Especially when the temperature and pressure of the exhaust system are low for a long time.iodine, unburned oil often accumulates in the exhaust tract, although. he is carried away. It is also difficult to be ignited by low temperature gas when it comes out of the chimney. Some old gasoline engines use the boiler exhaust gas bypass method to vent the gas directly to avoid contamination of the heating coil in the boiler. On modern ships, most bypass smoke exhaust pipes have been removed. The gas can only be discharged through the exhaust gas boiler, and the exhaust back pressure increases. Therefore, the accumulation of oil in the flue of a two-stroke gasoline engine operating at low load will gradually increase. The accumulated residual oil has undergone a physical and chemical preparation process before ignition. If there is sufficient air, when the exhaust temperature is above 210°C or whenIf an open flame is encountered, it will catch fire at the exit of the chimney inside the exhaust. pipe.
3. Sparks formed by the combustion of soot deposits. Most sparks emitted from the chimney are plate-shaped. Sparks usually occur shortly after travel and 10 to 15 days after travel, and the flame duration varies from half an hour to three hours. During the day it is not noticeable because of the light, but at night it is very shocking. This type of sparkle has a large bright spot, is black and red, and lasts a long time. Ashes and solid particles of different shapes come out of the chimney with the spark. They often fall onto the deck and continue to burn. which can easily cause fires. Generally speaking, in the exhaust system, there is little fire in the pipeline section from the compressor outlet to the boiler inletexhaust gas, and there is not much soot on the superheated steam coil of the exhaust gas boiler. However, dense heating fins are often found on saturated steam coils and numerous solid deposits on the funnel-shaped parts of exhaust gas boilers. These deposits are the main source of sparks.
The above are the reasons for chimney fires of gasoline generators. I hope this information can be useful to you. Below we will focus on preventative measures and solutions:
Preventive Measures Against Gasoline Generator Chimney Fires:
1. Keep the combustion in the cylinder of the gasoline engine in good condition;
2. Strengthen the monitoring of the combustion process of each cylinder and detect abnormal conditions in a timely manner
3. . Strengthen the management ofs exhaust gas boilers, maintain good combustion effect;
4. Suitable carbon remover and other chemicals should be regularly put into the exhaust pipe or boiler exhaust gas to avoid. descale and purify the air. The system can soften and drop carbon deposits on the pipe wall, and even lower the ignition point before burning
5. of the tanker, the chimney is equipped with a sprinkler fire extinguishing device.
Emergency Treatment for a Gasoline Generator Chimney Fire
1. If the first type of spark occurs, the gasoline engine load should be reduced immediately or stop the vehicle slowly, investigate the cause and eliminate the fault before continuing. Continue to use it, then increase it until the load required once smoke evacuation is normal;
2 Ifhe second and third types of sparks occur, they must be allowed; continue as long as the environment allows. “Blow off” to blow and burn the oily deposits in the exhaust system as much as possible, but the maintenance management and fire prevention of gasoline engines and exhaust gas boilers need to be strengthened; /p>
3, Except in cases of overheating of individual cylinders or local exhaust pipes which require slowing down due to excessive fire, the gasoline engine must continue to operate at a higher load
4. Do not use fire extinguishing equipment lightly, especially CO2 fire extinguishing equipment to prevent high temperature metal from exploding due to a sharp drop in temperature.
Reference materials:
http://www.sadengdongli.com/faq/135.htmlI hope that itIt will be useful to you Helped!