Oil coolers can be divided into air-cooled oil coolers and water-cooled oil coolers according to the different media of heat exchange, mainly used to cool hydraulic oil and lubricating oil; Oil cooler is widely used in plastic machinery, construction machinery, mining machinery, automobile, steel, wind power, aerospace and other industries. There are many types of oil cooler, water-cooled oil cooler is divided into tube oil cooler and plate oil cooler, plate oil cooler is divided into detachable plate oil cooler (detachable plate heat exchanger) and brazing plate oil cooler (brazing plate heat exchanger); Air - cooled oil cooler is divided into tube - sheet type and plate - fin type.
The main function of automobile oil cooler is to accelerate the heat dissipation of lubricating oil and keep it at a lower temperature. This device is usually arranged in the lubricating oil path, and its working principle is the same as the radiator. Oil coolers provide excellent cooling for key engine components such as crankcase, clutch and valve assemblies. The main material of the oil cooler includes aluminum, copper, stainless steel and other metal materials, and after fine welding or assembly process, the heat exchanger connected to the hot side channel and the cold side channel is formed. When the engine is just started, the oil temperature rises rapidly, and the oil cooler starts to play a role in this process, keeping the temperature of the engine shell at a suitable level. With the extension of the engine running time and the increase of the speed, the working state of the oil cooler also reaches the best. At this time, although the temperature of the engine shell increases, it will not overheat, which indicates that the thermal process has reached the equilibrium state. Oil coolers are widely used in the engine lubricating oil or fuel oil cooling system of vehicles, construction machinery, ships and other equipment. Through the heat exchange process, the lubricating oil is ensured to work in the optimal temperature range, so as to improve the operation efficiency and stability of the equipment.
Oil coolers are classified by function
First, heat dissipation type oil cooler
Heat dissipation type oil cooler is a simple oil cooler, its main function is to reduce the temperature of the oil through surface heat dissipation. Heat dissipation oil coolers usually use copper or aluminum pipes, which introduce the oil into the radiator and dissipate the heat through the radiation of the heat sink and cool the air by convection.
The main advantage of heat dissipation type oil cooler is simple structure, easy to use, can easily reduce the oil temperature of the engine. However, its cooling effect is relatively limited and can not play a good cooling effect in high temperature environment.
Two, heat transfer type oil cooler
Heat transfer type oil cooler is an oil cooler that achieves cooling through heat exchange between oil and water. Its main structure includes oil import, oil export, cooling water import and cooling water export. When the oil enters the oil cooler through the oil pipe, it meets the cooling water entering through the water pipe, and the heat is exchanged between the oil pipe and the water pipe, so that the oil temperature is reduced.
The advantage of heat transfer oil cooler is that it can make full use of the temperature of cooling water, reduce the temperature of oil, improve the cooling effect, and is suitable for high-performance engines and harsh working environment. However, the structure of heat exchange oil cooler is more complex, and the water cooling system needs to be added, and the cost is relatively high.
