Patent ID: 9714658
Date: 2017-07-25
CPC Classifications: F04D,F25J

Claim:
1. A centrifugal compressor comprising: a drive gear; a drive shaft protruding from one side of the drive gear in a central axis direction of the drive gear; a no. 1 driven pinion gear configured for rotation of the drive gear to be transmitted thereto; a no. 1 driven pinion shaft protruding from both sides of the no. 1 driven pinion gear in a central axis direction of the no. 1 driven pinion gear; a couple of first stage compressor sections, each of which is provided in each end of the no. 1 driven pinion shaft and is configured to compress fluid by rotation of the no. 1 driven pinion shaft; a no. 1 idle gear provided between the no. 1 driven pinion gear and the drive gear; a no. 2 driven pinion gear configured for rotation of the drive gear to be transmitted thereto; a no. 2 driven pinion shaft protruding from the no. 2 driven pinion gear in a central axis direction of the no. 2 driven pinion gear; a second stage compressor section provided to the no. 2 driven pinion shaft; and a no. 2 idle gear provided between the no. 2 driven pinion gear and the drive gear, wherein rotation axes of the drive shaft, the no. 1 driven pinion shaft, and the no. 2 driven pinion shaft are positioned at the same level in height, a rotation axis of the no. 1 idle gear is positioned upward or downward with respect to a plane defined by the rotation axes of the drive shaft, the no. 1 driven pinion shaft, and the no. 2 driven pinion shaft, and a rotation axis of the no. 2 idle gear is positioned at the same side of the rotation axis of the no. 1 idle gear with respect to the plane defined by the rotation axes of the drive shaft, the no. 1 driven pinion shaft, and the no. 2 driven pinion shaft.