Patent ID: 10151320

Abstract:
A compressor includes a rotor; a rotor casing surrounding the rotor from an outer circumferential side of the rotor and defining a main flow passage of a fluid between the rotor and the rotor casing; an extraction-chamber casing at an outer circumferential side of the rotor casing, and defining an extraction chamber in communication with the main flow passage between the rotor casing and the extraction-chamber casing; and an extraction nozzle connected to the extraction-chamber casing from an outer circumferential side of the extraction-chamber casing and configured to guide the fluid inside the extraction chamber to an outside of the compressor. A gap in a radial direction between the extraction-chamber casing and the rotor casing is larger at a first side of the extraction nozzle in a rearward rotation direction of the rotor than at a second side of the extraction nozzle in a forward rotation direction of the rotor.