Front-stage turbine type speed-increasing large-air-volume high-pressure fan

The utility model discloses a preceding-stage turbo-type speed-increasing large-air-volume high-pressure fan which comprises a motor, a turbo-blower pump body and a booster fan pump body, and the turbo-blower pump body comprises a turbo-blower pump shell, a turbo-blower pump cover, a turbo-blower impeller and a flow guide partition plate. The booster fan pump body comprises a booster fan pump shell, a booster fan pump cover and a booster fan impeller, the motor is fixedly connected between the back face of the turbine fan pump shell and the back face of the booster fan pump shell, and the turbine fan impeller is fixedly connected with one extending end of a motor shaft of the motor in a locking mode. And the other extending end of the motor shaft of the motor is connected with the booster fan impeller. According to the utility model, the motor, the turbine blower and the booster fan are arranged, air sequentially passes through the turbine blower, the connecting air pipe and the booster fan, the turbine blowe