Abstract: A single-entry screw pump with a housing which has an inlet and an outlet for a medium to be pumped, with two spindles which are rotatably mounted in the housing in slide bearings, the spindles each have a screw thread on their outer circumference between the slide bearings, the screw threads of the spindles engage with one another and convey the medium from the inlet to the outlet, the housing has a sleeve section in which the screw threads of the spindles are positioned, the sleeve section has a suction-side inlet opening and a pressure-side outlet opening, wherein the media flow from the inlet to the inlet opening is guided along the pressure-side slide bearing in a hydraulically equalising manner and from the outlet opening to the outlet along the suction-side slide bearing.

Abstract: A double-flow pump with a housing which has at least one inlet, at least one outlet and a conveyor housing with two single-part or multi-part conveyor units which convey a conveying medium from the inlet in opposite directions to the outlet, the conveyor units have shaft ends which are mounted in bearings, the bearings are each arranged in a bearing housing, wherein the shaft ends are detachably connected to the conveying units.

Abstract: A conveying system including a conveying chamber and a conveying screw. The conveying chamber includes an inlet opening and an outlet opening. The conveying screw is positioned in the conveying chamber and has a screw shaft with an axis of rotation and a screw thread positioned radially on the outside of the screw shaft. The conveying screw also includes one or more ejector elements radially on the outside of the screw shaft proximate the rear end of the screw thread. Each ejector elements includes an ejector surface that has a curvature against the direction of the rotation of the screw shaft. The ejector elements cover at least a portion of the outlet opening in the axial direction. The outlet opening is positioned radially outside of the ejector element.

Abstract: Technologies are generally described for clearance adjustments in twin-screw pump assemblies. A twin-screw pump assembly may include a conically shaped portion of a drive shaft enveloped by a bushing. For clearance adjustment, both clamping nuts of the drive shaft, which provide pretention to the bushing and secure an axial position of a threaded screw to the drive shaft, may be removed on the flow side of the pump assembly and the bushing loosened to adjust the angularity between bushing and drive shaft. The bushing may then be pushed over the conically shaped portion and both clamping nuts re-assembled. In some examples, a clamping nut of the driven shaft may be designed and used as removal/loosening tool for the drive shaft bushing.

Abstract: Technologies are generally described for clearance adjustments in twin-screw pump assemblies. A twin-screw pump assembly may include a conically shaped portion of a drive shaft enveloped by a bushing. For clearance adjustment, both clamping nuts of the drive shaft, which provide pretention to the bushing and secure an axial position of a threaded screw to the drive shaft, may be removed on the flow side of the pump assembly and the bushing loosened to adjust the angularity between bushing and drive shaft. The bushing may then be pushed over the conically shaped portion and both clamping nuts re-assembled. In some examples, a clamping nut of the driven shaft may be designed and used as removal/loosening tool for the drive shaft bushing.