Hasse & Wrede Gmbh

Centa-antriebe Kirschey Gmbh

Tutech Innovation Gmbh

Technische Universitat Hamburg-harburg

Michael Steidl

Florian Knopf

Nobert Reinsperger

Stephan Bohmeyer

Mandy Streifler

Norbert Reinsperger

Thierry Cabon

Robert Kempgen

Markus Mali

Michael Granzin

Edwin Kreuzer

Charles Perumal

Sebastian Willeke

Dora Terjek

A method determines a service life condition of a torsional vibration damper or absorber having a primary mass and a secondary mass, and a working chamber arranged between the primary mass and the secondary mass that is filled with a viscous damping medium. The vibration damper is arranged on a crankshaft of an engine in order to dampen or eliminate torsional vibrations of this crankshaft. The method includes: operating the engine; determining at least one operating parameter of the engine; simulating a temperature distribution of the viscous damping medium in the working chamber; and determining a lifetime condition of the vibration damper based on the operating parameter of the engine and the result of simulating the temperature distribution of the viscous damping medium.

Method for determining a life condition of a vibration damper or absorber, and arrangement for carrying out such a method

A crankshaft arrangement for a combustion engine includes a crankshaft and a torsional vibration damper having a primary mass and an inertia ring. The primary mass is fixedly connected to the crankshaft, and the inertia ring and the primary mass are coupled via a viscous fluid. The torsional vibration damper is attached to an output end of the crankshaft. The primary mass is coupled to a secondary coupling via an elastic coupling device. The torsional vibration damper is coupled to the secondary coupling via a feedback device. The secondary coupling is formed as a dual-mass flywheel with a primary flywheel, a secondary flywheel and the elastic coupling device. A method for damping torsional vibrations of a crankshaft of a crankshaft arrangement is provided.

Crankshaft arrangement with torsional vibration damper

A suspension arrangement for a vehicle, in particular a utility vehicle having a base and a structure, is disclosed. This arrangement includes at least one first spring and at least one second spring, the at least one first spring and the at least one second spring having spring attachments which are connected to attachment apparatuses of the structure on one side and of the base on the other. The at least one second spring is fastened to the base by way of at least one adjustment device. An adjustable air spring suspension arrangement and methods for controlling the suspension arrangements are disclosed.

Suspension arrangement and method for controlling suspension arrangements

A torsional vibration damper or torsional vibration absorber has a rotating system with: a primary mass, which is arranged on a rotatable shaft, for example on a crankshaft of an engine, in particular of an internal combustion engine, and preferably can be fastened for conjoint rotation; a secondary mass, which is movable relative to the primary mass; and an assembly for vibration damping and/or vibration absorption of the relative movement between the primary mass and the secondary mass. The assembly for vibration damping and/or vibration absorption of the relative movement between the primary mass and the secondary mass has at least one accumulator inside the rotating system of the torsional vibration damper or torsional vibration absorber.

Torsional vibration damper

A spring system of a vehicle, in particular a utility vehicle, includes a first spring/damper unit with a first stiffness and a first damping; a second spring/damper unit with a second stiffness and a second damping; and an additional mass as a tuned-mass absorber. The tuned-mass absorber is coupled to at least one negative stiffness. A vehicle having such a spring system and a method for adapting the stiffness of a spring system are provided.

Spring system having a wide-band insulating effect

A viscous torsional-vibration damper has a damper housing with an axis of rotation, an annular working chamber filled with a damping medium, an inertia ring arranged inside the working chamber, and a cover for media-tight closure of the working chamber. The cover is connected to the damper housing peripherally on one side by a sequence of a butt seam and an overlap seam.

Viscous torsional-vibration damper and method for producing a viscous torsional-vibration damper

A crankshaft arrangement for an internal combustion engine includes a crankshaft, a torsional vibration damper having a primary mass and a flywheel, wherein the primary mass is connected fixedly to the crankshaft, and the flywheel and the primary mass are coupled via a viscous fluid. The torsional vibration damper is attached to an output end of the crankshaft. The primary mass is coupled to a secondary coupling via an elastomer coupling ring. The torsional vibration damper is coupled to the secondary coupling via a feedback device. The feedback device has a negative stiffness.

Crankshaft arrangement comprising a torsional vibration damper

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.

Torsional vibration damper or torsional tuned mass damper

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. The torsional vibration damper is attached to an output end of the crankshaft, and the torsional vibration damper forms a centrifugal mass which is divided into a primary mass inertia and a secondary mass inertia, wherein the three functions of a clutch functional section, a flywheel and a torsional vibration damper are integrated into the torsional vibration damper.

Crankshaft assembly comprising a torsional vibration damper

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.

Viscosity-torsional vibration damper or absorber for a crankshaft of a combustion engine

A viscous torsional vibration damper includes: a) an annular damper housing, which bounds a damper chamber; b) an inertia ring arranged in the damper chamber; c) a bearing device, which supports the inertia ring in the damper housing and which has at least one bearing element with an axial bearing region and/or a radial bearing region, d) a shear gap between the inertia ring and the damper housing, which shear gap is filled with a viscous fluid, e) wherein a plurality of the axial bearing segments and/or a plurality of the radial bearing segments is circumferentially distributed on the at least one bearing element.

Torsional vibration damper having a bearing device

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.

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.

Actuator arrangement for applying a torque to a shaft, in particular a crankshaft of a reciprocating piston engine, and a corresponding method

Control device () controlling a drilling operation and methods by which the dynamics of the continuum in question can be divided into superimposed waves, of which the wave traveling in the direction of the actuator and/or drive () is compensated by the actuator. This prevents reflection of the energy on the actuator. By using two sensors () the wave traveling towards the actuator () and the wave traveling away from the actuator () can be calculated separately from one another, so that both the parameters of the wave traveling toward the actuator and the parameters of the wave traveling away from the actuator can be determined in order to be able to perform a control of the driving device of the drill string () on this basis.

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Berlin, Germany

Michael Steidl