| 摘要 |
A vacuum pump has a shaft bearing (6) supported in a bearing outer ring (8). In order to improve the damping properties a substantially cylindrical radial supporting ring (7) is provided between the outer ring (8) and an interior surface of a bore (9) in a housing (1). First and second circumferential projections (11, 12) project from opposite edges of cylindrical ring (7) on one side. On its other side, a third circumferential projection (13) is axially arranged between the first projections (11, 12). The first and second projections engage one of the outer race and the bore and the third projection engages the other. The damping of the radial support ring (7) is determined by its radial stiffness which is determined by the stiffness of the material and the distance between the projections (11, 12, 13).
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