How does a water pump work in a cooling system?

The engine water jacket, radiator and water pump are all filled with coolant.

The impeller is driven to rotate the shell and the coolant inside is driven by the impeller to rotate together with centrifugal force.

The coolant is flung to the edge of the impeller and exited through the drain into the engine block.

At the same time, a vacuum is created in the center of the impeller.

The coolant is sucked into the pump casing from the water pump inlet, the impeller keeps rotating, and the coolant is constantly circulating, when the water pump does not rotate, the coolant can circulate naturally, but the flow rate is slow, and the cooling effect is very poor.

The working principle of the cooling system is as follows: when the engine temperature rises, the engine water circulation thermostat is opened, the engine coolant enters the large circulation, and the engine drives the cooling fan to rotate for engine heat dissipation. The cooling system consists of a radiator, a cooling fan, a water pump, a thermostat, a coolant temperature gauge, a water jacket, a water pipe, a coolant expansion tank, and a coolant temperature sensor.

The function of the cooling system: 1. Change the cooling intensity according to the load, speed and temperature changes of the engine to ensure that the engine heats up quickly and maintains it at normal temperature; 2. Different cooling intensities are given to different working parts of the engine; 3. The heat generated by the engine when working is dissipated into the air to ensure that the engine works within the appropriate temperature range.

After the liquid is thrown out, the liquid is thrown out by the impeller at the output under the action of centrifugal force, and the liquid in the liquid pool is under the action of the outside atmospheric pressure, and the impeller does high-speed rotation in the pump body (the pump body should be filled with liquid before opening the pump), and flows into the pump through the suction pipe.

The working principle of the water pump, the pressure also increases gradually, and finally it is discharged from the outlet of the water pump. In this way, the liquid is continuously sucked up from the tank and then continuously discharged from the pump outlet. The volume of the pump diffusion chamber is constant, and the speed of the liquid thrown out in the pump diffusion chamber gradually slows down

After turning on the water pump, a vacuum low pressure area is formed in the center of the impeller, and the liquid in the pump body rotates with the impeller, and the purpose of the pump is to transport water from one place to another with the increase of the liquid thrown out, or to increase the pressure to convert the mechanical energy of the prime mover into liquid energy.

On the end face of the seal, there is a cooling water that is better than condensate, and the cooling water has both cooling and lubrication functions. In addition, the cooling jacket of the mechanical seal is supplied with cooling water, which comes from industrial water. Cooling water prevents the coolant from freezing and cracking the radiator and freezing the engine block or cover when the coolant is shut down in the cold winter.

Due to the relative movement between the pump shaft and the pump casing, in order to prevent the water in the pump from flowing out along the shaft, Chun Xun mechanical seals are used on both sides of the front pump. The sealed moving ring rotates together with the shaft, the static ring is fixed on the pump casing with an anti-turning pin, and the moving ring is tightly pressed on the static ring under the action of the spring, so that the moving ring and the static ring are in close contact along the axial direction, so as to achieve the purpose of sealing.

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The cooling system of the automobile engine is a forced circulation water cooling system, that is, the water pump is used to increase the pressure of the coolant and force the coolant to circulate in the engine. The cooling system is mainly composed of water pump, radiator, cooling fan, compensation water tank, thermostat, water jacket in the body, cylinder head and accessories. In the cooling system, there are actually two cooling cycles:

One is cooling hair.

The cooling system of the automobile engine is a forced circulation water cooling system, that is, the water pump is used to increase the pressure of the coolant and force the coolant to circulate in the engine. The cooling system is mainly composed of water pump, radiator, cooling fan, compensation water tank, thermostat, water jacket in the body, cylinder head and accessories.

In the cooling system, there are actually two cooling cycles: one is the main cycle that cools the engine, and the other is the heating cycle inside the car. Both cycles are engine-centric and use the same coolant. 1.Cools the main cycle of the engine.

The main cycle consists of two working cycles, the "cold cycle" and the "normal cycle". After a cold start, the engine gradually heats up, and the temperature of the coolant does not allow the thermostat in the system to be turned on. At this time, the coolant is simply circulated in the engine through the water pump to allow the engine to reach normal operating temperature as soon as possible.

As the engine temperature rises, the coolant temperature rises to the thermostat's opening temperature (usually after 80) and the cooling cycle begins to "cycle normally". At this time, the coolant comes out of the engine, passes through the radiator at the front of the car, dissipates heat, and then enters the engine through the water pump.

2.Heating cycle in the car.

It's a heating cycle, but for the engine, it's also the engine's cooling cycle. The coolant passes through the heating system in the car, sending the heat of the coolant into the car and back to the engine. One difference is that the heating cycle is not controlled by a thermostat.

As soon as the heater is turned on, the cycle will begin, regardless of whether the coolant is cold or hot.

What are the types of cooling systems.

There are two types of automotive cooling systems, namely liquid cooling and air cooling. The main job of the cooling system is to dissipate heat into the air body to prevent the engine from overheating, and another important role is to make the engine heat up as soon as possible and maintain a constant temperature.

1.Liquid cooling.

The cooling system of a liquid-cooled car circulates the liquid through pipes and channels in the engine. When the liquid flows through a hot engine, it absorbs the heat, which lowers the temperature of the engine. After the liquid flows through the engine, it is turned to a heat exchanger (or radiator), through which the heat from the liquid is dissipated into the air body.

2.Air cooling.

Some early automobiles used air-cooled technology, but modern cars rarely use this method. This cooling method does not circulate the liquid through the engine, but rather dissipates the heat of the cylinder through an aluminum sheet attached to the surface of the engine's cylinder. A powerful fan blows air into these aluminum plates, dissipating heat into the empty air, which cools the engine.

Because most cars use liquid cooling, ductworkThe car's cooling system has a lot of pipes. How does the cooling system work What are the types of cooling systems @2019