Rotor unit of a centrifugal separator

A rotor unit for a centrifuge for purifying flowing fluids, comprising:

• a plurality of disk elements which are stacked concentrically one on another and provided with at least one centrally located fluid flow-through hole, wherein the disk elements have lead-through openings by means of which the disk elements are pushed onto a number of essentially axially elongate guide elements distributed in the circumferential direction for guiding the disk elements in the circumferential direction and radially, and wherein the disk elements are held together by a first and a second end element at the ends of the stack of disk elements, at least some of the guide elements comprising tie rods which are arranged so as to interact with the end elements in such a way that the end elements can be displaced toward one another while the disk elements are pressed together, in addition to which means are arranged so as to engage in a locking way with the tie rods for retaining the disk elements in a pressed-together state with a small gap-forming interspace between the disk elements, the rotor unit being arranged so as to be rotated in a surrounding housing by a motor and wherein a central portion of at least some of the guide elements are interconnected by means of a cross-stay construction in order to prevent deflection of the guide elements owing to the centrifugal force during rotation of the rotor unit, said disk elements and said guide elements being rotatable together.