| 摘要 |
A pump has a housing in which a rotor is arranged, which is rotatable in the housing about a housing-fixed axis of rotation, the rotor having at least one recess in which is received at least one displacement body which, when the rotor rotates, revolves about the axis of rotation and at the same time runs along on a housing inner wall of the housing, the displacement body being radially movable in the recess between a position retracted into the recess and a position extended out of the recess. A first chamber is present between the outside of the rotor and the housing inner wall. The displacement body, when it revolves about the axis of rotation, subdivides the first chamber into a leading first subchamber and a trailing second subchamber. The first subchamber is connected by means of a first duct and the second subchamber by means of a second duct in the rotor to a further chamber which is formed between the displacement body and an inner wall of the recess and which, according to the radial movements of the displacement body which occur when the rotor revolves about the axis of rotation, is alternately increased in volume, with the result that an additional vacuum arises in the further chamber and in the second subchamber, or decreased in volume, with the result that an additional overpressure arises in the further chamber and in the first subchamber.
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