We know that the air cooled diesel engine has a different way of heat transfer compared with the water-cooled diesel engine. Water-cooled engine is through the cooling medium water, through the radiator to pass the heat to the atmosphere indirectly; air-cooled engine is directly with the air for cooling.
Air-cooled diesel engine simple structure, small volume, light weight Compared with water-cooled diesel engine, air-cooled machine reduces the parts, simplifies the structure, simplifies the production process, and reduces the production cost.
In the past, the cylinder center distance of air-cooled engine is usually bigger than the water-cooled engine with the same bore and displacement, so the body length is slightly longer than the water-cooled engine, but the water-cooled engine needs the water tank, the fan and the water cavity at the front and rear of the engine, so on the whole, the water-cooled engine is longer than the air-cooled engine.
Comparing the water-cooled model and the air-cooled model with the same bore and stroke, the air-cooled model is 100mm shorter than the water-cooled model in overall length; the height of the air-cooled model is also lower because it does not have a water tank, and there is not much difference in width between the two. In recent years, with the development of air-cooled machine, its cylinder heart distance is getting smaller and smaller, such as the second generation of air-cooled diesel engine 178F air-cooled machine cylinder heart distance to bore ratio of 1.3, with the advanced level of the water-cooled model is comparable.
Therefore, the air-cooled engine and water-cooled engine in the cylinder center distance this index is getting closer and closer. This trend makes the air-cooled model more and more superior to the water-cooled model in the overall size.
Why Do We Say We Should Choose Air Cooled Diesel Engine For Business ?
The manufacturing technology requirements of air-cooled diesel engines are higher than those of water-cooled diesel engines, and the requirements of heat resistance, wear resistance and expansion coefficient of the materials used are also higher.
The air-cooled diesel engine is convenient to start, economical to run, and highly adaptable to the environment, which is welcomed by the majority of users.
Note: After starting, idle at low speed for a while, standby temperature will rise, and put the oil pressure into operation after normal, so as not to damage the parts due to excessive temperature rise.
The engine should be idled at medium and low speed for a while and then shut off after the standby temperature drops appropriately.
During the operation, it should be noted that the engine temperature should not be too high. The air-cooled diesel engine completely depends on the strong airflow generated by the fan to cool the engine block. The operating temperature should not exceed 120 degrees (higher than that of water-cooled diesel engine).
What is Water Cooled diesel Engine ?
The water-cooled diesel engine is an internal combustion engine using diesel fuel as fuel, which converts the heat energy released from fuel combustion into electric energy or mechanical energy device. It is widely used in industrial and agricultural production. Water-cooled diesel engine is mainly circulating water-cooled diesel engine and evaporative water-cooled diesel engine two categories, the main difference is the cooling method: circulating water-cooled diesel engine mainly by the water tank in the forced cooling system to cool water, hot water up into the water tank, the fan forced cooling into cold water, and then pumped back to the diesel engine to use again. The evaporative water-cooled diesel engine is to rely on the natural evaporation of water refrigeration, water evaporation process also takes away the heat of the diesel engine, to achieve the purpose of cooling. But this cooling method needs to add water often, and consume relatively more oil, but the price is cheap, suitable for use in the plain area.
Here is 10 tips we need to pay more attention when using air cooled diesel engine .
Air Cooled Diesel Engine You Need To Learn When Using.
1.Check and adjust the tightness of the fan tape regularly. If the tape is too tight, the fan bearing will be overloaded and the tape will be easily worn; if it is too loose, the tape will slip and reduce the air volume of the fan, which will cause the diesel engine to overheat and the tape will be easily damaged. The correct degree of elasticity of the tape, should be in the diesel engine start and turn off the engine without slippage, use thumb to press the limb with 20~50N force, the distance of falling is 10~15mm is suitable.
2. Inject lubricating oil into the fan bearing and tensioning wheel on time (many air-cooled diesel engines are equipped with tensioning wheel to adjust the tightness of fan belt) bearing to ensure good lubrication, flexible rotation and no lag.
3.Avoid overheating of diesel engine caused by too long idle time, insufficient fan speed, reduced air volume and poor cooling effect.
4. The air guide cover must not be deformed to ensure good sealing.Before starting, check whether the hook of the air guide hood is fastened. During operation, be sure to cover the air hood properly, otherwise it will change the direction and flow of air inlet, form hot air backflow, and reduce the cooling effect.
5.Should ensure that the wind shield does not leak, damage, loss, to ensure that the cooling effect.
6.Timely troubleshooting of oil leakage.The oil will be blown onto the heat sink by the fan and stick to the dust, which will hinder the ventilation between the heat sinks and weaken the heat dissipation ability.This can also cause the tape to slip, causing insufficient fan speed and early corrosion damage or breakage of the tape.
7.The accumulation of oil on the surface of fan blade, cylinder sleeve radiator, cylinder head radiator and oil radiator for a long time will make the heat dissipation effect seriously worse, so it is necessary to timely flush with diesel oil or blow out dust and debris from the opposite direction of cooling air flow with compressed air.
8.Frequent inspection and timely maintenance of the fan belt rupture instructions installed straight, in order to timely find the belt fault, prevent overheating phenomenon.
9.Frequently check the advance Angle of oil supply (too small advance Angle of oil supply will cause the diesel engine temperature to rise too fast and cause overheating).It should be adjusted in time when it finds that it does not conform to the regulations.
10.After working for a certain period of time, the fuel injection quality and the overall fuel injection pressure of the fuel injector should be checked on the test bench to ensure that the fuel injector works well and prevent overheating of the diesel engine due to the poor operation of the fuel injector.
Conclusion
In the choice of diesel engine, mainly according to the different use of the environment, use, personal habits and facilities to make the right choice, although, air-cooled diesel engine and water-cooled diesel engine have their own advantages and disadvantages, from the construction, ease of use and maintenance, the advantages of air-cooled diesel engine more prominent.
