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ChineseDuring the operation of the automobile water pump, the state of the water pump will be abnormal and the pre-rotation will not work. How to deal with this situation and check it in time? The working state of the water pump is abnormal or the impeller of the water pump slips, so that the pumped water volume of the water pump cannot be proportional to the speed of the engine, or the water seal leaks.
Check the working state of the water pump Open the cover of the radiator water inlet to accelerate the engine slowly; check the circulation of the cooling water in the water inlet; if the impeller does not slip continuously, the water pump is not working properly. When observing the circulation of the cooling water, another method can be used: let the engine stop when the water temperature is high, and quickly remove the rubber hose from the car cylinder head to the radiator upper water chamber joint, and plug the upper water chamber joint with a cloth ball. , Fill cooling water into the radiator from the water filling port, and then start the engine. For example, the water in the cylinder water jacket and the radiator is pumped out by the water pump about 200ml outside the hose mouth. The impeller does not slip, indicating that the water pump is working normally; otherwise, it is abnormal .
Pump flow test The pump flow test must be carried out on a special test bench. The driving device of the test bench drives the water pump to rotate, and observe whether the water discharge meets the manufacturer's standard or whether there is water leakage.
Automobile water pumps generally have the function of self-priming. Self-priming means: when the suction pipe of the water pump is filled with air, the negative pressure formed when the pump is working is used to increase the water pressure lower than the water outlet under the action of atmospheric pressure, and then Discharge from the drain end of the pump. No need to add water before this process.
A micro water pump with this self-priming ability is called a micro self-priming water pump. The principle is similar to a micro air pump. The automobile water pump combines the advantages of the self-priming pump and the chemical pump, and is made of a variety of imported materials that are corrosion-resistant. , basically no noise. Exquisite workmanship, not only has self-priming function, but also has large flow, high pressure, stable performance and easy installation. Therefore, this large-flow water pump is often used in new energy vehicles.
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