Abstract: The invention relates to a screw hub (10) for a centrifugal screw (80), said screw hub (10) having, in the longitudinal direction (R), at least one cylindrical longitudinal portion (11) and a portion (12) at the solid-discharge end, the cylindrical longitudinal portion (11) having an open wall structure (40), and the portion (2) at the solid-discharge end having an at least partly closed shape that differs from a simple conical shape.

Abstract: The invention relates to a centrifugal screw (10) comprising a screw hub (15) and a screw flight (20) connected to the screw hub (15), the screw hub (15) having, in the longitudinal direction (R), at least one cylindrical longitudinal portion (11) and a portion (12) at the solid-discharge end. According to the invention, an open wall structure (40) is formed only in some sections of the cylindrical longitudinal portion (11), said open wall structure (40) in the cylindrical longitudinal portion (11) extending at most over a length (LW) of 50% of the total length (GL) of the cylindrical longitudinal portion (11).

Abstract: The invention relates to a transverse disc (60) of a centrifuge screw (30) for stabilising a screw hub structure. According to the invention, at least one opening (70) is formed at least in some sections on at least 75% of all the imaginary circle lines (71) of the transverse disc (60) between the centre point (M) and the transverse disc circumference (72).

Abstract: The invention relates to: an inlet region (80) of a centrifuge screw (30), the centrifuge screw (30) having, at least in the inlet region (80), a screw hub (32) with an open wall structure, in particular with longitudinal bars (58); and an inlet tube opening (47) of an inlet tube (46), the inlet tube opening (47) opening into the inlet region (80). Opposite the inlet tube opening (47) there is an impact element (70), in particular an impact disc, having an acceleration element (75), the acceleration element (75) being designed such that a medium impinging on the acceleration element (75) can be accelerated in the direction of open spaces (85) of the open wall structure, said open spaces being in particular between the longitudinal bars (58).