Abstract: A centrifugal liquid cleaner comprising a vertical hollow axle fixed immovably on a base and having a liquid inlet and outlet and carrying a cylindrical rotor made up of a bushing arranged coaxially with the hollow axle and wound spirally with a band whose adjacent turns contain spacers arranged radially one after another parallel with the hollow axle and forming, together with the band, gaps for the passage of the liquid, and impellers installed at the ends of the bushing and made in the form of discs with ribs intended for fastening the edges of the spacers. The impeller discs are made and secured in such a manner that the distance between each disc and the corresponding edge of the band helix satisfies the condition: ##EQU1## where: l.sub.1 =distance between the disc of one impeller and the corresponding edge of the band helix;l.sub.2 =distance between the disc of the other impeller and the corresponding edge of the band helix;R=maximum radius of the band helix;r=moving radius of the band helix;r.sub.