High-efficiency water pump and adapter assembly

The invention provides a high-efficiency water pump and adapter assembly, and belongs to the technical field of engine cooling. The assembly is high in assembly efficiency, reasonable in water flow channel design, low in flow resistance and low in mechanical loss of a cooling system. The impeller side of a water pump body of the assembly is attached and buckled to a water pump adapter, the water pump body and the water pump adapter are fixedly connected through a plurality of connecting bolts, a pumping cavity is formed in the water pump adapter and communicated with a water channel, an impeller of the water pump body is located in a water pump volute, and the pumping cavity covers the water pump volute to form a closed cavity. The water pump body operates, namely the impeller rotates, cooling liquid is pumped in the closed cavity, and the cooling liquid enters the air cylinder body cooling water jacket along the water channel to achieve cooling circulation. According to the assembly, the water pump body and