| 摘要 |
A vane pump or motor has structural features for ensuring a substantially constant relationship between rotor vanes (30) and a surrounding wall 44) of a rotor chamber (15) of a stator (16). This is done by changing shapes of either the surrounding wall or the guide tracks to be out of round such that, during a full rotation, the arrangement of the rotor vanes (30) to the surrounding wall (44) remains the same. That is, a diameter (b) of the rotor chamber (15) in an axial plane (a-a), defined by maximum and minimum radial movement of a rotor vane (30), is greater than a diameter (c) perpendicular thereto, or a diameter (d) of the guide tracks (59) perpendicular to the axial plane is greater than a diameter (e) lying in the axial plane (a-a) of the guide tracks (59). An intake and an exhaust are provided in one of two symmetrical sections of the rotor chamber (15) defined by the axial plane (a-a). Elastic guide rings, rotatable with the rotor, can also be used.
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