Abstract: The invention relates to an external gear pump (1) having a pump housing (2). An inlet (2a), an outlet (2b), and a working chamber (6) are formed in the pump housing (2). A first gear (11), which is arranged on a first shaft (21), and a second gear (12), which is arranged on a second shaft (22), are arranged in the working chamber (6) in such a way that said first and second gears mesh with each other. Both gears (11, 12) have teeth having a tooth width (b). The first shaft (21) is radially supported in at least one plain bearing (61), and the second shaft (22) is radially supported in at least one further plain bearing (63). The plain bearing (61) has a bearing diameter (D63), and the further plain bearing (63) has a further bearing diameter (D63). During operation of the external gear pump (1), a delivery volume (V) of a working medium can be conveyed from the inlet (2a) to the outlet (2b). The two bearing diameters (D61, D63) are selected in such a way that the ratio V/(D612*b) is less than 1.

Abstract: A toothed wheel machine including a housing for receiving two meshing and especially helical-toothed wheels. The toothed wheels are axially mounted in a sliding manner by axial surfaces between bearing bodies received in the housing, and radially by a bearing shaft received in the bearing bodies. During the operation of the toothed wheel machine, an axial component of a force resulting from the hydraulic and mechanical forces generated during operation acts on each toothed wheel in the same axial direction. A counter-force against the respective axial force component is applied to the toothed wheels and/or bearing shafts, each counter-force applying the same amount of pressure as the respective axial force component, or less than same.

Abstract: A toothed wheel machine including a housing for receiving two meshing toothed wheels. The toothed wheels are axially mounted in a sliding manner by axial surfaces between bearing bodies received in the housing, and radially by a bearing shaft received in the bearing bodies. Hydraulic mechanical forces are generated during the operation of the toothed wheel machine, an axial force component of the forces acting on each toothed wheel in the same axial direction. In order to counteract said axial force component, a pressure field is provided between at least one axial surface of one of the toothed wheels in the direction of the action of the axial force component, and the bearing body adjacent to the at least one axial surface.

Abstract: A toothed wheel machine including a housing for receiving two meshing and especially helical-toothed wheels. The toothed wheels are axially mounted in sliding manner by axial surfaces between bearing bodies received in the housing, and radially by a bearing shaft received in the bearing bodies. During the operation of the toothed wheel machine, an acial component of a force resulting from the hydraulic and mechanical forces generated during operation acts on each toothed wheel in the same axial direction. A counter-force against the respective axial force component is applied to the toothed wheels and/or bearing shafts, each counter-force applying the same amount of pressure as the respective axial force component, or less than same.