When
1, the lubrication system
of the engine, a lot of transmission parts are mainly as a high speed in a small clearance relative movement Liu, such as crank journal and the main bearing, crank pin and connecting rod bearings, cam journal the camshaft bearing, piston, piston ring and cylinder wall surface, movement of each valve mechanism and the sub-gear pair and the like. Although the working surfaces of these parts have been fine processing, but is an enlarged view of the uneven surface.
If these surfaces to be lubricated, the friction between them strongly. Dry friction between the metal surface not only increases the power consumption of the engine, accelerated wear of the working surface of the parts, but also may be due to frictional heat generated by the burning surface of the working part, so that the engine can not operate.
function of the lubrication system is continuously in sufficient amounts during engine operation, the temperature of the oil delivered to the appropriate clean the entire surface of the friction drive member, and forms an oil film between the friction surfaces, to achieve fluid friction. Thereby reducing the frictional resistance, reduce power consumption, reduce engine wear, to achieve the purpose of improving the durability and reliability of engine operation.
2. Body
supplied engine oil (lubricant) system. Supplied to the friction surface for bearing and gear oil, from the cooling and lubrication, rust preventing part, and away impurities.
lubrication system by the pump, oil filter, a nozzle, and a heat sink composed of the oil separator. Oil pump includes a gear pump and a return pump oil receiving pressurized oil. Oil mixed with a lot of air in the back, so back to the pump to be several times larger than the total flow booster. Oil filter for removing impurities, usually a mesh. Oil filter in the booster passage equipped with a bypass valve, to ensure the normal oil supply during a cold start or filter plugging. Sometimes before the scavenge pump equipped with a magnetic chip breaker plug type subject to discover Wear metal chips collected by the oil. Nozzle is a direct-current, high-speed drilling oil from the bearing may be a bearing inner ring. Oil separators typically rotated at high speed with the rotor by centrifugal force to separate oil and gas. Gas lighter, can be cited from the tank to the chamber above the rotor. There is a stationary plate type oil separator. A radiator device for cooling the lubricating oil with the fuel or air.
Oil system is divided into open and closed two. In the closed lubrication system, the oil cooling all returned to the tank can continue to cool. In some lubrication system, oil cooling flow directly after the booster pump at the entrance, not returned to the tank. In open lubrication system, all of the used oil discharged into the outside of the machine, may be omitted scavenge pump accessories, etc., but fuel is increased, the engine is adapted to work in a short time.
of the working medium is lubricating systems lubricants, oil lubricants used Aeroengine known as oil. Oil has two types of mineral and synthetic oils (see lubricant).
3, with FIG.
