Impeller hub positioning mechanism

The utility model discloses an impeller hub positioning mechanism which comprises a fixing shaft, a shaft sleeve is sleeved outside the fixing shaft, and the shaft sleeve is used for being fixedly connected with a hub. The fixing shaft is further provided with a first dial which is annular, and the inner ring of the first dial is fixedly connected with the periphery of the fixing shaft. The shaft sleeve is further fixedly connected with a fixing block, a first pointer is arranged on the fixing block, and the first pointer points to scales on the first dial. By adopting the rotating mode of the fixing shaft and the shaft sleeve, the hub rotating problem can be solved, meanwhile, the first dial is installed on the fixing shaft and matched with the first pointer, the hub rotating angle accurate control problem is solved, then the hub positioning and rotating problems in the welding process can be solved at the same time, and the mechanism is simple in structure, convenient to operate and low in cost. The mainten