Patent ID: 8756954
Filing Date: 2014-06-24
Classification: F04D

Abstract:
1. A turbo compressor comprising: a first compression stage having a first impeller and a first housing enclosing said first impeller, that draws in and compresses a fluid to provide compressed fluid in said first compression stage; a second compression stage having a second impeller connected to said first compression stage via a rotation shaft, and a second housing enclosing said second impeller, that is arranged adjacent to said first compression stage with backsides thereof facing each other, and that further compresses said compressed fluid provided from said first compression stage; a discharge port provided on said first housing to discharge said compressed fluid from said first compression stage, a suction port provided on said second housing to suction said compressed fluid into said second compression stage, that is formed in a same plane as said discharge port; and a U-shaped pipe that connects said discharge port and said suction port, wherein the second compression stage includes an introduction scroll chamber connected to the suction port, which is formed so as to annularly enclose the rotation shaft, the introduction scroll chamber includes an inner surface located opposite said second impeller in said thrust direction, said inner surface curves from said radial direction to said thrust direction to reach said second impeller, the introduction scroll chamber configured to supply said compressed fluid to said second impeller via said inner surface, said compressed fluid supplied in said radial direction from said U-shaped pipe through said suction port, to said second impeller.