| 摘要 |
An infinitely variable ring gear pump comprising a stationary casing, an internal rotor (3) in said casing rotatably supported and driven by means of a shaft (2) and an external rotor (4) likewise rotatably supported, meshing with the internal rotor (3), the difference in the number of teeth of the gear ring running set comprising the internal rotor (3) and the external rotor (4) being equal to unity, having a tooth shape in which a plurality of expanding and contracting displacement cells (7) each sealed off from the other materializes due to tooth tip contact and kidney-shaped low and high-pressure ports (8, 9) fixedly arranged laterally in the region of the displacement cells (7) being provided in the casing, the ports (8, 9) being separated from each other by webs (10, 11) and the angular position of the eccentric axis (eccentricity 17) of the ring gear running set (5) being variable relative to the casing. The support (12) of the external rotor (4) of the ring gear running set (5) occurs at the outer diameter (13) of the latter in an adjusting ring (14) preferably the same in width which is rollable with zero slip by its outer circumferential or pitch circle (15) on an inner circumferential or pitch circle (16). The difference in the diameters of the two circumferential or pitch circles (15, 16) equals twice the eccentricity (17) of the ring gear running set (5).
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