Patent ID: 8956135
Filing Date: 2015-02-17
Classification: F04C

Abstract:
1. A multi-rotor compressor comprising: a sun rotor including a helical sun rotor flute; a first planet rotor including a helical first planet rotor flute intermeshed with the sun rotor flute to define a first compression pair; a second planet rotor including a helical second planet rotor flute intermeshed with the sun rotor to define a second compression pair; and a housing in which the first and second compression pairs are rotatably mounted, the housing including a first port solely defined by the housing in communication with the first compression pair, and a second port solely defined by the housing in communication with the second compression pair, wherein portions of the first and second ports which communicate with the first and second compression pairs have different geometry for offsetting pulsations in a working fluid flowing through the first and second ports respectively, the sun rotor, the first planet rotor and second planet rotor, having their centers of rotation arranged along a common straight line axis; wherein the first port and second port comprise suction ports and the portions of the first and second suction ports which communicate with the first and second compression pairs have different geometry such that there is an offset in the onset and/or termination of a suction flow of a working fluid through the first suction port with respect to the second suction port; wherein the housing is configured such that the size of the portion of the first suction port in communication with the first compression pair is larger than the size of the portion of the second suction port in communication with the second compression pair.