A torsional vibration damper

摘要

A torsional vibration damper particularly for the engine of a ship comprises a housing having walls defining an annular channel in which an inertia member is rotatably received. An annular bearing (15) is positioned between said inertia member (8) and a wall (12,13) of said channel, and an annular bearing support of hardened metal between the annular bearing and said wall of said channel. An annular groove (17) is provided in the inertia member (8) for receipt of an annular axial thrust bearing (15) when the damper is serviced. Fixing bores to which lifting apparatus can be secured to remove the inertia member (8) during service are provided. The inertia member (8) has a plurality of countersunk bores so that axial thrust bearing pads may be fitted when servicing. In certain applications the inertia member comprises a plurality of separable coaxial annular elements. The inertia member is removed during service by attaching lifting tackle to the fixing bores and sliding it on to a plurality of shoes removably fixed to the housing.