Torsional vibration damper

A torsional vibration damper or torsional vibration absorber, comprising:

• a rotating system having:
• (i) a primary mass, which primary mass is arranged on a rotatable shaft and which is securable in a rotationally secure manner, (ii) a secondary mass which is movable relative to the primary mass, and (iii) a sub-assembly for vibration damping and/or vibration absorption of the relative movement between the primary mass and the secondary mass, wherein
• the sub-assembly for vibration damping and/or vibration absorption of the relative movement between the primary mass and the secondary mass has at least one pressure store inside the rotating system of the torsional vibration damper or the torsional vibration absorber,
• the sub-assembly for vibration damping and/or vibration absorption of the relative movement between the primary mass and the secondary mass has one or more fluid chamber(s) which is/are filled with a fluid and which is/are formed in the secondary mass, as part of the rotating system,
• wherein a volume of the fluid chambers in an event of torsional vibrations and resultant relative movements between the primary mass and secondary mass is changeable by way of the at least one pressure store,
• wherein the fluid chambers are each subdivided by radially extending vanes of a hub portion which is connected to the primary mass,
• wherein
• the at least one pressure store forms a gas spring and has at least one gas portion and at least one fluid portion, which are separated by a membrane,
• the fluid portion is connected to the fluid chambers by fluid lines.

A torsional vibration damper or torsional vibration absorber, comprising:

• a rotating system having:
• (i) a primary mass, which primary mass is arranged on a rotatable shaft and which is securable in a rotationally secure manner, (ii) a secondary mass which is movable relative to the primary mass, and (iii) a sub-assembly for vibration damping and/or vibration absorption of the relative movement between the primary mass and the secondary mass, wherein
• the sub-assembly for vibration damping and/or vibration absorption of the relative movement between the primary mass and the secondary mass has at least one pressure store inside the rotating system of the torsional vibration damper or the torsional vibration absorber,
• wherein
• the at least one pressure store is arranged on a vane of a hub portion and forms a gas spring having a chamber and a membrane,
• the membrane delimits the chamber with respect to the fluid chamber.

A method for damping torsional vibrations of a crankshaft of a piston machine having a torsional vibration damper or torsional vibration absorber, the method comprising:

• (S1):
• providing the torsional vibration damper or torsional vibration absorber fitted to the crankshaft, wherein the damper or absorber comprises:
• a rotating system having:
• (i) a primary mass, which primary mass is arranged on a rotatable shaft and which is securable in a rotationally secure manner, (ii) a secondary mass which is movable relative to the primary mass, and (iii) a sub-assembly for vibration damping and/or vibration absorption of the relative movement between the primary mass and the secondary mass, wherein
• the sub-assembly for vibration damping and/or vibration absorption of the relative movement between the primary mass and the secondary mass has at least one pressure store inside the rotating system of the torsional vibration damper or the torsional vibration absorber,
• (S2):
• adjusting the at least one pressure store which is installed in the torsional vibration damper or torsional vibration absorber with a gas or air which is acted on with pressure;
• and
• (S3):
• damping the torsional vibrations of the crankshaft during operation of the piston machine by way of the torsional vibration damper or torsional vibration absorber.