Side-channel compressor for a fuel cell system for conveying and/or compressing a gaseous medium

Abstract

The invention relates to a side-channel compressor () for a fuel cell system () for conveying and/or compressing a gaseous medium, in particular hydrogen, comprising a housing (); a compressor chamber () which is situated in the housing () and which has at least one encircling side channel (); a compressor impeller () which is situated in the housing () and which is arranged so as to be rotatable about a rotational axis (), wherein the compressor impeller () has conveying cells () arranged on the impeller circumference in the region of the compressor chamber (); and in each case one gas inlet opening () formed on the housing () and one gas outlet opening (), which are fluidically connected together via the compressor chamber (), in particular the at least one side channel (). The housing () has a respective first and second end face () radially to the rotational axis (), each end face facing the compressor impeller (), and a first and second functionally relevant gap dimension () is formed in the region of each gap surface. According to the invention, the compressor impeller () is designed in multiple parts and has a first impeller shell () and a second impeller shell (). The impeller shells () are arranged adjacently to each other axially to the rotational axis () in particular, and each impeller shell is at least partly made of a plastic.