There are many kinds of construction machinery and equipment, and its main products are: loaders, excavators, forklifts, cranes, rollers, concrete mixers, bulldozers, graders, pavers, shield machines, etc.
Among them, the annual output and inventory of loader, excavator and forklift account for more than 80% of the market share, and the oil consumption also accounts for more than 80%.
Oil parts of construction machinery equipment mainly include engine and cooling system, transmission system, braking system and some grease parts. Different engineering machinery and equipment use oil in common, but also have their own characteristics.
Engine and engine oil
At present, construction machinery is mainly driven by diesel engines, and natural gas engines are also used in a small amount on XCMG, Foton Lovol and other loaders. The overall structure of the diesel engine includes two mechanisms: crank connecting rod and valve train, as well as five systems: fuel supply, lubrication, cooling, intake and exhaust, starting and power supply. Under high-speed and high load working conditions, all friction surfaces, such as cylinder wall and piston ring, crankshaft journal and bearing, camshaft and bearing, are well lubricated.
The function of the lubrication system is to deliver lubricating oil to the friction surfaces of moving parts to achieve the functions of lubrication, sealing, cleaning, cooling, hydraulic pressure, buffering and rust prevention.
Selection of Diesel Engine Oil Quality Grade
The quality level of diesel engine oil shall be selected according to the recommendation of the internal combustion engine manufacturer, the mechanical load and thermal load of the diesel engine, the severity of working conditions, fuel performance and other factors.
Selection of viscosity grade of diesel engine oil
The main basis for selecting viscosity grade of diesel engine oil includes:
Engine design requirements: generally selected according to the engine design for construction machinery.
Ambient temperature: high viscosity oil products, such as 15W-40 or even 20W-50, should be selected if it is often in a high temperature environment. If it is used in northern winter, oil products with better low-temperature performance should be selected.
Load: For construction machinery with large tonnage, heavy load and continuous high-speed operation, high viscosity oil shall be selected to ensure sufficient oil film strength at high temperature; For small mechanical equipment with small load and moderate working condition, diesel engine oil with lower viscosity can be used.
New and old equipment: the new equipment has small fitting clearance in all aspects, and low viscosity oil can be selected. The old equipment is worn to a certain extent, and the fit clearance is large, so the oil with higher viscosity is required to meet the better sealing requirements, so the oil viscosity of the old equipment is generally higher.
The above is a detailed introduction to FAW Four Ring Lubricant, and I hope it will be helpful to you. If you have any questions, please contact us. We will provide you with professional service https://www.smxnykj.com/