Abstract: A torsional vibration damper or torsional tuned mass damper having a rotating system having a primary mass, which is arranged, or preferably fixable for conjoint rotation on a rotatable shaft, such as a crankshaft of a motor, for example, in particular an internal combustion engine, and having a secondary mass, which is movable relative to the primary mass. An assembly for vibration dampening and/or tuned vibration dampening of the relative motion between the primary mass and the secondary mass is formed in part outside of the rotating system of the torsional vibration damper or torsional tuned mass damper.

Abstract: A crankshaft assembly which is designed for a reciprocating-piston machine of an internal combustion engine includes a crankshaft, a torsional vibration damper for damping resonance torsional vibrations of the elastic torsion modes of the crankshaft, and an output. The torsional vibration damper has a primary mass inertia and a secondary mass inertia, the primary mass inertia being rigidly connected to a crankshaft and the secondary mass inertia being coupled as a seismic mass with a viscous liquid to the primary mass inertia. The torsional vibration damper is configured to assume the function of a flywheel for reducing rotational non-uniformity in addition to the function of reducing the resonance torsional vibrations of the crankshaft.

Abstract: A viscosity-torsional vibration damper or absorber for a crankshaft of a combustion engine includes an annular damping or absorbing arrangement which can be fastened to the crankshaft. The damping or absorbing arrangement is fastened in an outer diameter region to a holding device which, on the other hand, can be fastened to the crankshaft and can be sprung in the axial direction of the crankshaft, but is inherently rigid radially with respect to the crankshaft.

Abstract: A torsional vibration damper or torsional tuned mass damper having a rotating system having a primary mass, which is arranged, or preferably fixable for conjoint rotation on a rotatable shaft, such as a crankshaft of a motor, for example, in particular an internal combustion engine, and having a secondary mass, which is movable relative to the primary mass. An assembly for vibration dampening and/or tuned vibration dampening of the relative motion between the primary mass and the secondary mass is formed in part outside of the rotating system of the torsional vibration damper or torsional tuned mass damper.

Abstract: A rotary viscous vibration damper or absorber has a hub part which can be fastened to a crankshaft of an engine, in particular of an internal combustion engine, and a vibration damper ring which is mounted such that it can be rotated relative to the hub part. A shear gap which is filled with a silicone oil is formed between the hub part and the vibration damper ring, in which shear gap flange bushings for guiding the vibration damper ring are mounted. The flange bushings are composed of a liquid crystal polymer.

Abstract: A torsional vibration damper has a hub part primary mass mountable on a motor drive shaft, and an interia ring secondary mass which at least partially encloses the hub part in the radially outer region. A gap between the hub part and the inertia ring is filled with fluid. A seal device between the hub part and the flywheel ring prevents escape of the fluid. The seal device has a first ring connected tightly to the hub part, a second ring connected tightly to the inertia ring, and an elastomer ring connected on one side sealingly to the first ring and on the other side to the second ring.

Abstract: A viscosity-torsional vibration damper or absorber for a crankshaft of a combustion engine includes an annular damping or absorbing arrangement which can be fastened to the crankshaft. The damping or absorbing arrangement is fastened in an outer diameter region to a holding device which, on the other hand, can be fastened to the crankshaft and can be sprung in the axial direction of the crankshaft, but is inherently rigid radially with respect to the crankshaft.

Abstract: An actuator arrangement for applying a torque to a shaft of a machine, in particular a reciprocating piston engine, includes: a) at least one actuator device for applying the torque; and b) at least one rotatable seismic mass coupled to the shaft. The at least one actuator device is designed to apply the torque to the shaft between the seismic mass and the shaft. A corresponding method is provided for active damping of torsional vibrations of the shaft having the actuator arrangement.

Abstract: A viscous torsional vibration damper has an annular damper housing defining a damper chamber; an inertia ring in the damper chamber; a bearing device supporting the inertia ring with one or more bearing elements. At least one bearing element is a ring not circumferentially closed in a mounted state. A shear gap between the inertia ring and the damper housing is filled with a viscous fluid. The at least one bearing element that is not circumferentially closed is cut to length from a strip. In order to produce the bearing element, a strip is provided, on which one or more axial bearing sections and one or more radial bearing sections and preferably one or more webs are formed. Then, the bearing element is cut to length from the strip and the bearing element is inserted into an open damper housing and laid on a bearing seat.

Abstract: A torsional vibration damper has a hub part primary mass mountable on a motor drive shaft, and an interia ring secondary mass which at least partially encloses the hub part in the radially outer region. A gap between the hub part and the inertia ring is filled with fluid. A seal device between the hub part and the flywheel ring prevents escape of the fluid. The seal device has a first ring connected tightly to the hub part, a second ring connected tightly to the inertia ring, and an elastomer ring connected on one side sealingly to the first ring and on the other side to the second ring.

Abstract: A crankshaft assembly which is designed for a reciprocating-piston machine of an internal combustion engine includes a crankshaft, a torsional vibration damper for damping resonance torsional vibrations of the elastic torsion modes of the crankshaft, and an output. The torsional vibration damper has a primary mass inertia and a secondary mass inertia, the primary mass inertia being rigidly connected to a crankshaft and the secondary mass inertia being coupled as a seismic mass with a viscous liquid to the primary mass inertia. The torsional vibration damper is configured to assume the function of a flywheel for reducing rotational non-uniformity in addition to the function of reducing the resonance torsional vibrations of the crankshaft.

Abstract: A viscous torsional vibration damper has an annular damper housing, which bounds a damper chamber; an inertia ring arranged in the damper chamber; a bearing device, which supports the inertia ring in the damper housing and which has one or more bearing elements, wherein at least one of the bearing elements is designed as a ring that is not circumferentially closed in a mounted state; a shear gap between the inertia ring and the damper housing, which shear gap is filled with a viscous fluid. The at least one bearing element designed as a ring that is not circumferentially closed is cut to length from a strip. In order to produce the bearing element, a strip is provided, on which one or more axial bearing sections and one or more radial bearing sections and preferably one or more webs are formed. Then, the bearing element is cut to length from the provided strip and the bearing element that has been cut to length is inserted into an open damper housing and laid on a bearing seat.

Abstract: An actuator arrangement for applying a torque to a shaft of a machine, in particular a reciprocating piston engine, includes: a) at least one actuator device for applying the torque; and b) at least one rotatable seismic mass coupled to the shaft. The at least one actuator device is designed to apply the torque to the shaft between the seismic mass and the shaft. A corresponding method is provided for active damping of torsional vibrations of the shaft having the actuator arrangement.

Abstract: A rotary viscous vibration damper or absorber has a hub part which can be fastened to a crankshaft of an engine, in particular of an internal combustion engine, and a vibration damper ring which is mounted such that it can be rotated relative to the hub part. A shear gap which is filled with a silicone oil is formed between the hub part and the vibration damper ring, in which shear gap flange bushings for guiding the vibration damper ring are mounted. The flange bushings are composed of a liquid crystal polymer.