① Oil temperature is one of the main factors that affect oil pressure
When the engine oil temperature is too high, it will not only increase the fuel consumption (leakage, transpiration, combustion), but also affect the quality of the engine oil, which will make it difficult to form and maintain the oil film on the surface of the conflict parts of the automatic loading car engine, and the oil pressure in the main oil channel can not be established, and then the parts will be worn. The effect of water temperature on oil pressure must be completed by oil temperature. Therefore, it has certain indirectness and needs certain time.
② The high oil temperature of the automatic loader directly damages the engine
The high temperature of the engine of the automatic loading car means that the oil temperature and water temperature of the engine exceed 90 ℃. Because of the principle of thermal expansion and cold contraction, it is easy to reduce the gap of the engine after the temperature is increased, resulting in serious wear or "cylinder pulling".
When the heat produced by excessive wear exceeds the heat dissipation capacity, the temperature of Bearing Bush will rise, and part of the temperature will reach the melting point of lead, and lead and copper in the bearing bush will melt, which will eventually lead to serious ablation of crankshaft and bearing or "Bush shaft holding", and the consequences are unimaginable. Therefore, when the temperature of oil and water is too high, the oil temperature should be reduced first.
③ First cooling water temperature has a great influence on the establishment of oil pressure in the main shaft oil channel of the engine of automatic loading vehicle
As we all know, precipitation temperature is generally adopted "load reduction, high speed" approach. When the speed is too high, the inertia force and centrifugal force of the piston Lianxuan group will be increased, and the load of the crankshaft bearing will be increased. At the same time, the relative collision speed between the journal and the bearing bush will also increase, resulting in the increase of heat per unit time, the oil volume of the oil pump will decrease, and a lot of oil will be thrown out from the main oil duct, which will lead to the collision of various parts, and the wear of the surface will be aggravated due to the lack of satisfied lubricating oil, and the oil temperature will further rise.
④ Lowering the oil temperature of the automatic loading car can slow down the speed of water temperature rising
The function of the water tank of the automatic loading car is to reduce the oil temperature of the engine. The method of "reducing load and low speed" is generally used to reduce oil temperature. At this time, although the heat exchange time of coolant at the high temperature parts is long, the water flow speed slows down and the heat dissipation time is prolonged. At the same time, due to the load reduction and speed drop, the heat generated by the conflict of the moving parts is also reduced accordingly.
Therefore, lowering the oil temperature can not only reduce the heat generated by the engine, but also indirectly reduce the heat absorbed by the coolant, and then slow down the rate of water temperature rise