The following measures can be taken when using and maintaining diesel engines:
1) do a good job of diesel engine running in. When the machine is out of the factory, it is usually undercooled, but the load and speed must be gradually increased until the mill is used until it reaches the rated value, so as to send the quality of the friction surface and reach the best roughness. When the engine is disassembled and repaired, it should also run in accordance with the situation for a certain period of time.
2) the quality of the assembly should be ensured when the diesel engine is repaired. The parts must be cleaned and cleaned, and the clearance between the cylinder liner and the piston should be appropriate. The installation requirements of the piston ring (three gaps, leakage degree and opening position of each ring) must be satisfied to ensure that the central line of the piston is perpendicular to the axis of the crankshaft.
3) strengthen the maintenance of the lubrication system to ensure that the oil is clean. The quantity and quality of the oil in the oil pan should be checked regularly and added or replaced in time. Before adding, the oil must be fully precipitated and filtered, the refueling site and the refueling equipment must be clean, the tank tanker should be set up. Before the oil is replaced, it is necessary to clean the crude oil first and thoroughly clean the lubricating system, strictly prohibit the mixing of different oil 名媛直播; the oil filter should be checked and cleaned regularly according to the requirements of the instructions. Attention should be paid to the oil pressure at any time during the working process.
4) strengthen the maintenance of the fuel supply system to ensure that the combustible mixture is clean. Often check and add fuel to the tank. Before adding, the fuel must be precipitated and filtered, the site and equipment must be ensured clean when the addition is added; the air filter is regularly maintained according to the technical requirements, and the diesel engine is strictly prohibited from working without the filter.
5) strengthen the maintenance of the cooling system to ensure that the diesel works at suitable temperature. During the working process of the diesel engine, we should pay attention to the temperature of the coolant, find the problem to handle in time, check the coolant volume of the coolant and the tension of the fan conveyor belt, and the coolant added must be soft water.
6) the correct starting method of cold car must be mastered. When the cold car starts, especially in the cold season, the formation of lubricating film on the surface of the cylinder liner is very poor. To this end, before starting, it is better to turn the crankshaft around 20 circles by hand or to turn the crankshaft around lOs with the starting device, and then start again after the oil pressure, and take the necessary heating measures according to the characteristics and environmental conditions of the diesel engine.
7) avoid the mutation of the working conditions as much as possible. When the diesel engine is just starting, do not work at a full load immediately; the diesel engine should be operated at about 3 min at low speed before the fire is extinguished; the throttle should be barred before and before the start of the diesel engine. In the working process, the change of speed and load should not be too sharp to avoid frequent starting.
8) long term overloading and long idle running are prohibited. When the diesel engine is overloaded, the temperature of the engine rises rapidly, the viscosity of the oil is reduced, the lubricating oil film is easily damaged, and the long overloading operation may lead to the wear of the cylinder sleeve; the idle time is too long, and the corrosion and wear of the cylinder sleeve will be accelerated because of the low temperature of the machine, and the idle speed can not exceed lOmin.
9) avoid unnecessary oil supply as far as possible. When the diesel engine rotates or maintains technical maintenance before freezing start, the fuel valve must be closed because the injection pump produces high pressure oil when the crankshaft turns, and the injector is injected into the cylinder, and some of the fuel is washed down the cylinder wall and dilutes the oil and the cylinder wall oil film, and the part of the fuel flow in the cylinder makes the starting of the engine. Difficult, burning rough. When checking the adjustment of the oil advance angle, the throttle should also be closed at the beginning. When the crankshaft is in place, the throttle will be placed in the maximum oil supply position.
