Turbine assembly of water flow sensor

The utility model provides a turbine assembly of a water flow sensor. The turbine assembly of the water flow sensor comprises a turbine body and a magnetic rotor installed in the turbine body. The turbine body is formed by connecting a turbine body upper end cover and a turbine body lower end cover in a butt joint mode. The turbine body lower end cover is provided with a water inlet, and the turbine body upper end cover is provided with a water outlet. A fixed impeller is arranged in the water inlet end. The middle portion of the fixed impeller is provided with an impeller shaft, an upper end shaft is arranged in the water outlet end. The middle portion of the upper end shaft is provided with an upper end installation hole. An insertion shaft extends upwards out of the impeller shaft of the fixed impeller. The magnetic rotor is provided with a rotating shaft and a permanent magnet fixed to the middle portion of the rotating shaft. The lower end of the magnetic rotor is provided with a movable impeller. The two ends of an impeller shaft in the middle of the movable impeller are provided with an upper insertion hole and a lower insertion hole respectively. The upper insertion hole is in interference fit connection with the lower end of the rotating shaft, and the portion, at the lower end of the turbine body, of the insertion shaft is movably inserted into the lower insertion hole. The upper end of the rotating shaft of the magnetic rotor is movably inserted into the upper end installation hole of the upper end shaft. By the adoption of the turbine assembly of the water flow sensor, the problems that the water flow sensor is low in precision at low water pressure, and a rotor gets stuck due to water scale can be effectively solved.