| 摘要 |
The safety device has a pulley (7) rotatably mounted on a stationary part (2) and a safety rim (10) associated with the pulley. The safety rim is a separate component, which is fastened to the stationary part, and axially engages the pulley. The space (12) defined by the stationary part, the safety rim, and the side of the pulley is charged with a scavenging fluid (S). The side (7b) of the pulley facing the stationary part carries at least one clearing body (16) that turns with the pulley.
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