Rotary filter arrangement having a plurality of hollow shafts

A filtration arrangement for a filtration device having a container, the filtration arrangement comprising:

• a plurality of hollow shafts rotatably mounted in a machine frame;
• and
• a plurality of membrane filter disks disposed on the plurality of hollow shafts, wherein the plurality membrane filter disks are disposed axially spaced apart on each of the plurality of hollow shafts;
• and
• deformable spacer sleeves, which axially mutually space apart the plurality of membrane filter disks on the plurality of hollow shafts, are disposed between part of or all of a neighboring membrane filter disks,
• wherein the plurality of hollow shafts are coupled to at least one drive device;
• wherein the plurality of hollow shafts are configured to discharge permeate from the container,
• wherein an end of each of the plurality of hollow shafts on which the plurality of membrane filter disks are disposed is introducible into the container such that opposite ends of the hollow shafts project externally from the container,
• wherein the plurality of hollow shafts are non-circular,
• wherein an external cross-section of each of the plurality of hollow shafts defines a regular polygon, and
• wherein the deformable spacer sleeves are pretensioned such that the deformable spacer sleeves deform such that an internal circumference of the deformable spacer sleeves, in a region of corners or of a largest external diameter of a respective one of the plurality of hollow shafts, are pushed onto an external circumference of the plurality of hollow shafts such that the axially spaced apart plurality of membrane filter disks are tightly clamped in a rotationally secured manner on the plurality of hollow shafts.