Eccentric screw machine with asymmetrical projections

摘要

An eccentric screw machine (10) demonstrates a Stator (11) having an inner lining (17), which demonstrates teeth projecting inwards. The tips of these teeth are provided with micro-ribs (26 to 29), which are embodied asymmetrically with respect to the radials (R). They preferably demonstrate a flatly rising edge (30) and a steeply falling edge (31). This thus results in improved operating performance, depending on the direction of rotation.

主权项

1. Eccentric screw machine (10), especially for sludgy media,
comprising a stator (11), which demonstrates a channel (15) delimited by an elastomeric material, wherein the channel (15) has a cross section which demonstrates a maximum radius (R1) at at least two locations (18, 19) separated from one another in the circumferential direction (U) and demonstrates inward protuberances (20, 21) between them, wherein other projections (26-29) are arranged on the inward protuberances (20, 21), further comprising a rotor (22), which is arranged in the channel (15) of the stator (11) to delimit at least one chamber, characterized in that the other projections (26-29) are embodied asymmetrically relative to the radial direction (R), wherein the other projections (26, 27, 28, 29) relative to one direction of rotation of the rotor (22) are asymmetric in the same direction; and wherein the other projections (26, 27, 28, 29) demonstrate a leading edge (30) with respect to the rotation of the rotor (22) and that said leading edge is more flatly inclined than its trailing edge (31).