Vacuum pump with eccentric drive vane (eccentric pump design)

摘要

Vacuum pumpof the rotating vane type comprising: - a housing (4) defining a cavity (18) having an inlet and an outlet, - a drivable vane member (20) for a rotary driven movement inside the cavity (18), - a rotor (30) inside the cavity, - a rotatable central shaft (40) extending into the cavity, wherein the vane member (20) is coupled to the central shaft (40) by means of an eccentric element (42) on the central shaft, and slidably arranged in the rotor 30), the rotor (30) being rotatable together with said vane member (20) upon rotation of the vane member, wherein a rotational axis (AS) of the central shaft (40) is offset from the rotational axis (AR) of the rotor (30) and the point of action (AE) of the vane member (20) is offset from the rotational axis of the central shaft (40) by means of the eccentric element (42) on the central shaft (40), and wherein the rotor (30) encloses radially the eccentric element (42) of the central shaft (40).