The engine is the heart of the crawler type rotary tiller. There are many metal surfaces rubbing against each other inside the engine. These parts move fast and have poor environment. The operating temperature can reach 400 ° C to 600 ° C. Under such bad working conditions, only qualified lubricating oil can reduce the wear of engine parts and extend the service life. What requirements should qualified smooth oil satisfy? In other words, what are the six functions of smooth oil?
① Smooth wear reduction: there is rapid relative sliding between the piston and the cylinder, and between the main shaft and the bearing bush. To prevent the parts from being worn too fast, it is necessary to establish an oil film between the two sliding surfaces. An oil film with a satisfactory thickness separates the surfaces of relatively sliding parts, so as to achieve the purpose of reducing wear.
② Cooling: the engine oil can bring the heat back to the oil tank and then radiate it to the air to help the water tank cool the engine.
③ Cleaning: good engine oil can circulate the carbides, sludge and wear metal particles on engine parts back to the oil tank, and wash the dirt on the working surface of the parts through the smooth oil.
④ Sealing and leakage prevention: the engine oil can form a sealing ring between the piston ring and the piston to reduce gas leakage and prevent external pollutants from entering.
⑤ Rust and corrosion prevention: smooth oil can absorb on the surface of parts to prevent water, air, acidic substances and harmful gases from contacting with parts.
⑥ Shock absorption and buffering: when the pressure at the cylinder port of the engine rises sharply, the load on the piston, piston chips, connecting rod and crankshaft bearing is suddenly increased. This load is smoothly transmitted through the bearing, so that the received impact load plays a buffering role.
