What is the role of automobile water pump?

In automobile engine cylinder block, there are multiple for cooling water circulation channel, and placed in the front of the car radiator (commonly known as water tank) through the water pipes connected to form a large water cycle system, outlet on the engine, equipped with a water pump, driven by fan belt, within the engine cylinder block water heat pump, the pump into the cold. Beside the water pump and a thermostat, cold (car), when the car has just started not to open, make the cooling water without water tank, only within the engine cycle (commonly known as small cycle), momentum motivation above the temperature of 95 degrees, is opened, the hot water is pumped into the tank engine inside, when the car on the cold wind blowing water tank, heat can be taken away.

The Structure Of Automobile Water Pump Is Introduced & Working Principle

Centrifugal pumps are widely used in automobile engines. Its basic structure is composed of water pump shell, connecting plate or pulley, water pump shaft and bearing or shaft bearing, water pump impeller and water seal device and other parts, is the main component of the car.
The engine drives the pump bearings and impeller to rotate through the pulley, and the coolant in the pump is driven by the impeller to rotate together. Under the action of centrifugal force, the coolant is thrown to the edge of the pump shell, while producing a certain pressure, and then flows out of the channel or water pipe. The center of the impeller due to the coolant is thrown out and the pressure is reduced, the coolant in the water tank in the pump inlet and impeller center under the pressure difference action by the water pipe is inhaled into the impeller, to achieve the reciprocating circulation of the coolant.
The bearing supporting the pump shaft is lubricated with grease, so it is necessary to prevent coolant leakage into the grease to cause grease emulsification, and also to prevent grease leakage. The sealing measures of water pump to prevent leakage are water seal and sealing pad. The water seal seal ring and the shaft are installed between the impeller and the bearing through interference fit, and the water seal static seal seat is tightly pressed on the shell of the pump, so as to achieve the purpose of sealing the coolant.
The pump housing is connected to the engine by a gasket and supports moving parts such as bearings. The water pump housing also has a drainage hole, located between the water seal and the bearing. Once the coolant leaks through the water seal, it can be discharged from the drain hole to prevent the coolant from entering the bearing chamber and damaging the bearing lubrication and leading to corrosion of parts. If there is coolant leakage after the engine stops, it indicates that the water seal has been damaged.

How Is The Car Pump Driven

It is usually driven by the engine's crankshaft through the V-belt. The transmission belt encircles between the crankshaft pulley and the water pump pulley, the crankshaft turns the water pump shaft also follows the operation, and the water pump shaft drives the impeller to rotate, so as to realize the mechanical energy into hydraulic energy.
The impeller is the core of the pump work, the movement of the impeller itself is very simple, just rotating with the shaft. But because of the action of the blade, the movement of the liquid in the impeller is very complicated. On the one hand with the impeller rotation for implicated movement, on the one hand in the blade driving down constantly from the rotating impeller thrown out, that is, the relative impeller movement. Therefore, the outer diameter of the impeller, the height and Angle of the impeller blade, as well as the gap with the pump shell, directly affect the performance of the pump.

Symptom Of Broken Water Pump In Automobile & How To Judge Whether The Water Pump Is Damaged

1. Water pump damage will weaken the cooling circulation capacity or even do not circulate, there will be cooling liquid "boiling" phenomenon.
2. The engine leaks near the water pump.
Leakage of coolant can leave a coolant color trace on the pump vent, resulting in high water temperature symptoms after lack of coolant.
3. Abnormal sound of water pump occurs when the engine is working.
Abnormal sound of water pump may be due to internal foreign bodies, or bearing wear.
Second check whether the mechanical failure of the pump itself, the common reasons are: the filler is too tight or between the impeller and the pump body is stuck and blocked by debris; Pump shaft, bearing, leakage reduction ring rust; Serious bending of pump shaft, etc. Elimination method: relax the packing, dredge the ice lead tank to dismantle the pump body to remove sundries and rust; Remove the pump shaft for correction or replace with a new pump shaft.

1.Water temperature is high, in the exclusion of other reasons, you can determine whether the pump is the problem.
2. Look at the flow of liquid in the water tank when refueling. When refueling door, water will flow, which shows that there is no problem with the pump.
3. Watch the water pump for leakage and listen to the abnormal sound of the water pump.
The function of the pump is to increase the pressure on the coolant to ensure its circulation in the cooling system and accelerate the heat emission. As a long-term operation of the device, the use of the process, the pump will also appear failure.
Judge whether the car pump is bad, because first observe whether the water tank water (remember, must be cold car to open the water tank cover), water shortage of natural temperature is high; And then want to observe the water temperature, in the first place in the car, slightly accelerator for a while, to observe water thermometer (usually not more than half of the 70-90 degrees or so), if the water temperature rising almost red line) (for example, if you can touch a close to the water tank of the larger the water pipe, if relatively cool, don't feel very hot, it must be something wrong with the cooling system and also want to do Whether the thermostat is good, whether the cooling fan is working, and so on, can finally determine whether the pump has been damaged.