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What is the working principle of an automotive water pump?


Automotive water pump is an important component of the engine on a car. Its main function is circulating coolant to maintain normal operating temperature of the engine. The water pump assembly consists of water pump body, enclosure, impeller, bearing, seal, and other parts. It pumps circulating coolant by rotating and driving the impeller.

The working principle of the water pump assembly can be simply described as a process of water suction and drainage. When the engine works, the impeller of the water pump assembly is driven by the engine crankshaft and rotates. The rotating impeller creates a low-pressure zone within the pump body, allowing the coolant to be sucked into the pump.

As the impeller rotates, the coolant is pushed into the engine water tank, which exchanges heat with the outside air via the radiator to cool down the coolant. After the coolant dissipates heat in the radiator, it flows back to the water pump assembly and is sucked in again by the impeller, thus working cyclically.

The impeller design and sealing performance of the water pump assembly play a crucial role in boosting its operation efficiency. An excellent impeller design can increase the suction and drainage efficiency of the water pump assembly, and consequently ensures sufficient cooling of the engine. In addition, good sealing performance can effectively prevent coolant leakage and maintain stable operation of the water pump for long.

vika water pumps

Advantages of vika water pumps:

Pump body: The body of vika water pumps is made of the same dust resin material as OE products.

Water seal: The water seals of vika water pumps are supplied by Hunan Torch, the water seal supplier of OE products. Featuring good sealing effect and strong load bearing capacity, they seal the coolant to prevent leakage, and meanwhile isolate the coolant from the water pump bearing to protect the bearing.

Bearing: Bearing is one of the key components of water pumps. All bearings of vika water pumps are supplied by C&U, a domestic OE water pump supplier. These bearings provide higher load bearing capacity and better heat dissipation property, with a warranty covering 80,000 kilometers.

Impeller and belt pulley: In the design of impellers for vika water pumps, the number of blades and opening/closing angle are well controlled to maximum pump flow for optimal engine cooling. Impellers and belt pulleys of various materials and forms are made available to customers.