Principle of Volvo diesel generator set

The manufacturer of Volvo diesel generator will study the working principle of water cooling system with you: according to the circulation mode of coolant, the water cooling system can be divided into forced circulation water cooling system and natural circulation water cooling system. The cooling water jacket is cast in the cylinder head and cylinder block of diesel engine. After the water pump pressurizes the coolant, the coolant calms the water jacket of the cylinder block through the water distribution pipe. cooling

Fluid colleagues absorb the heat from the cylinder wall, the temperature rises, then flows into the cylinder head water jacket and enters the water pipe through the thermostat and radiator. At the same time, due to the rotating suction of the fan, it enters the radiator and the air is blown out through the radiator core. Therefore, the heat of the coolant flowing through the radiator core is continuously radiated into the atmosphere and the temperature is reduced. Finally, after being pressurized by the water pump, it flows into the water jacket of the cylinder again, so the cycle continues and the speed of the diesel engine increases. In order to distribute water evenly in the front and rear cylinders of diesel engine, usually there are many water distribution pipes in the front and rear cylinders of diesel engine. The distribution pipe is a metal pipe, which generates oil heat in the length direction of the water hole. The larger the water pump, the closer the cooling intensity of the front and rear cylinders, and the whole machine is cooled evenly.

Most Volvo diesel generators use forced circulating water cooling system. That is, the water pump is used to increase the pressure of the cooling medium. The volume of the cooling system is much smaller than that of natural circulation, and the cooling of the upper and lower cylinders is more uniform.

The water cooling system is also equipped with a water temperature sensor and a water temperature gauge. The water temperature sensor is installed on the water outlet pipe of the cylinder head, and the water temperature of the water outlet pipe of the river is transmitted to the water temperature gauge. The operator can use the water temperature gauge at any time to understand the working condition of the cooling system. The normal operating water temperature is usually 80-90 ° C. Coolant and anti cold night. The coolant used in diesel engine shall be clean soft water. If hard water is used, its minerals will settle at high temperatures and adhere to pipes, water jackets and radiator cores to produce scale and reduce heat dissipation. The ability to easily overheat the diesel engine will also poison the radiator core and accelerate the wear of the pump impeller and pump housing. Hard water containing more minerals needs to be softened before it can be added to the cooling system. The common method of softening hard water is to add 0.5-1.5g sodium carbonate to 1L of water. If the article precipitates, precipitate the generated impurities in 0.5-0.8g sodium hydroxide, and then inject the above purified water into the cooler.