Cummins diesel generator set will inevitably appear wear phenomenon after a period of use, this is a normal phenomenon. However, if there is unreasonable excessive wear and tear, such a situation is abnormal. It may be due to the improper use of the user, or it may be due to some failures of the machine. Therefore, the user should understand what factors will make the Cummins diesel generator set wear, in order to avoid the situation of excessive wear.
Diesel generator sets such as Cummins diesel generator set, Yuchai generator set wear is generally affected by the quality of fuel and lubricating oil, the use of diesel engine speed and load, environmental conditions and operating conditions and other reasons.
The quality of fuel and lubricating oil should be adapted to the structure of the diesel engine. If the diesel contains sulfur or other impurities, in the combustion process will produce acids and other corrosive substances, accelerate the wear of the cylinder; Too much heavy fraction in diesel fuel, after combustion, it is easy to form carbon accumulation, so that the piston ring and cylinder abrasive wear; The viscosity of diesel oil has influence on the mixture formation and the reliability of oil supply equipment. For lubricating oil, the biggest impact is the viscosity and oxidation resistance, should be based on the Cummins diesel generator diesel engine working conditions reasonable choice of use, must not indiscriminate use.
Cummins diesel generator set test shows that the diesel engine friction increases with the increase of speed and load. Because when the load increases, the unit pressure on the friction surface increases and the thermal condition is poor. When the speed increases, the number of friction per unit time is half plus, and under the same power, the speed increases than the load increases wear is greater. But too low speed because can not ensure good liquid lubrication conditions, also increase wear. Therefore, for a certain diesel engine, there is a most suitable working speed range. In addition, the diesel engine often accelerates, slows down, stops and starts the unstable work, due to the frequent change of speed and load, the diesel engine lubrication condition is poor, the thermal state is unstable, wear will increase. Especially in the starting, the crankshaft speed is low, the oil pump supply is not timely, and then the oil temperature is low, the oil viscosity is large, the friction surface is difficult to establish liquid lubrication, and the wear is very serious.
The temperature of the use environment also has an impact on the wear of Cummins diesel generators. When the temperature is high, the engine is easy to overheat, the viscosity of lubricating oil is low, and the wear of parts will increase. When the temperature is low, the viscosity of lubricating oil becomes larger, the diesel engine is difficult to start, and the cooling water cannot maintain the normal temperature when working, which increases the wear and corrosion of parts. Diesel engine wear is more serious when starting at low temperature.
The operating temperature of Cummins diesel generator set is one of the important factors affecting the wear. In the process of use, due to the limitation of cooling system structure, the change of working load and speed, the change of ambient temperature and other factors, so that the diesel engine operating temperature range is large. The practice shows that the temperature of cooling water is controlled at 75~85℃, and the temperature of lubricating oil at 75~95℃ is the most favorable.
Friendly reminder: Methods to avoid excessive wear of Cummins diesel generator set: reasonable selection of diesel engine operating conditions, improve the run-in quality of diesel engine, selection of fuel and lubricating oil suitable for engine work needs, improve the level of operation technology, timely maintenance. These methods can effectively reduce the wear condition of Cummins generator set, thus extending the service life of diesel generator set.
Post time: Dec-09-2022