CNWAGNER Automobile Engine Parts BMW Water Pump 11517586925

Auto Replacement Parts Auto Engine Components Water Pump 11517586925 For BMW

The composition of automobile water pump

• The automobile water pump is in the cylinder block of the automobile engine. There are multiple water channels for the circulation of cooling water, which are connected to the radiator (commonly known as the water tank) placed in the front of the automobile through water pipes to form a large water circulation system. The nozzle is equipped with a water pump, driven by the fan belt, to pump out the hot water in the engine block water channel, and pump the cold water in.
• There is also a thermostat next to the water pump. When the car is just started (cold car), it is not turned on, so that the cooling water does not pass through the water tank, but only circulates in the engine (commonly known as the small cycle), until the temperature of the engine reaches 95 degrees or more. When it is turned on, the hot water in the engine is pumped into the water tank, and the cold wind when the car moves forward blows through the water tank, taking away the heat.
• The composition of the automobile water pump is composed of the water pump shell, the connecting plate or pulley, the water pump shaft and the bearing or shaft bearing, the water pump impeller and the water seal device and other parts. It is the main component of the automobile.
• The impeller is the core of the pump. The movement of the impeller itself is very simple, just rotating with the shaft. However, due to the action of the blades, the movement of the liquid in the impeller is very complicated; on the one hand, it moves with the rotation of the impeller, and on the other hand, it is continuously thrown out from the rotating impeller under the drive of the blade, that is, it moves relative to the impeller. Therefore, the outer diameter of the impeller, the height and angle of the impeller blades, and the gap with the water pump casing directly affect the performance of the water pump.
• In addition, the car water tank is filled with water, and the water inside is used for engine cooling (the engine cooling system is divided into large cycles and small cycles). The water tank and the intercooler are installed in front of the engine in the front of the car. Generally, a car with an intercooler also has a supercharger (referred to as intercooler) to reduce the temperature of the intake air of the engine, thereby increasing the output power of the engine.

The working principle of automobile water pump

1. The purpose of automobile water pump work is to transport water from one place to another, or to increase the pressure to convert the mechanical energy of the motive force into liquid energy.
2. Its function is to pressurize the coolant flowing through the radiator and send it into the cylinder water jacket to facilitate the flow of cooling water! The principle is to use the centrifugal force generated by the impeller to pressurize the water and send it out!
3. The working principle of the automobile water pump is as follows: the engine drives the water pump bearing and the impeller to rotate through the pulley, the coolant in the water pump is driven by the impeller to rotate together, and is thrown to the edge of the water pump shell under the action of centrifugal force, and at the same time generates a certain pressure, and then from Outflow from water outlet or pipe. The pressure at the center of the impeller is reduced due to the cooling liquid being thrown out. The cooling liquid in the water tank is sucked into the impeller through the water pipe under the action of the pressure difference between the inlet of the water pump and the center of the impeller to realize the reciprocating circulation of the cooling liquid.
4. The bearing supporting the water pump shaft is lubricated with grease, so it is necessary to prevent the coolant from leaking into the grease to cause the grease to emulsify, and at the same time to prevent the leakage of the grease. The sealing measures of the water pump to prevent leakage include water seals and gaskets. The water seal dynamic seal ring and the shaft are installed between the impeller and the bearing through an interference fit, and the water seal static seal seat is tightly press-fitted on the water pump casing to achieve the purpose of sealing the coolant.

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