Speed-increasing centrifugal compressor

The invention relates to a speed-increasing centrifugal compressor which comprises a motor assembly, a speed-increasing assembly and a pneumatic assembly, the speed-increasing assembly is connected with the motor assembly, and the pneumatic assembly is connected with the speed-increasing assembly; the motor assembly is connected with an external power source, the rotating speed of the high-speed motor is increased to the ultra-high speed of hundreds of thousands of revolutions, the ultra-high rotating speed is transmitted to the pneumatic impeller, and therefore large-flow gas output is achieved. Positive pressure transmitted by the speed increasing assembly provides supporting force in the radial direction for the inner transmission part, and the pneumatic assembly obtains large-displacement airflow. The speed-increasing centrifugal compressor is selected, and the problems that an air-floating bearing of an air-floating centrifugal compressor in the market is unreliable, poor in stability and incapable of st