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US 7,604,542 B2Granted
Torsional vibration damper
AssigneeZF Friedrichshafen AG
InventorsHartmut Bach, Thomas Dögel, Igor Kister
Life of this patent
Estimating the term…
Abstract
A torsional vibration damper includes a drive-side transmission element connected to a drive and a takeoff-side transmission element, which can deflect rotationally with respect to the drive-side element. A damping device is installed between the two transmission elements and transmits torque between the drive-side transmission element and the takeoff-side transmission element. The damping device has a gas spring system with a reservoir containing a gaseous medium. The reservoir of the gas spring system is connected to a pressure circuit which allows, at least when there is a change in the torque to be transmitted by the gas spring system, adjustment of pressure in the reservoir to adapt the characteristic of the gas spring system to a new torque.
Claims34
A torsional vibration damper for transmitting torque between a drive and a takeoff, said torsional vibration damper comprising:
- a drive-side transmission element connectable to the drive and rotatable about an axis of rotation;
- a takeoff-side transmission element connectable to the takeoff and rotatable about the axis of rotation;
- a damping device installed between said drive-side transmission element and said takeoff-side transmission element, wherein said takeoff-side transmission element is rotationally deflectable relative to said drive-side transmission element against an urgency of said damping device, said damping device comprising a gas spring system transmitting torque between said drive-side transmission element and said takeoff-side transmission element, said gas spring system having a reservoir containing gaseous medium, wherein a characteristic of said gas spring system being changeable in response to a pressure in said reservoir;
- and
- a pressure circuit connected to said reservoir of said gas spring system, said pressure circuit being actuatable to adjust a pressure in said reservoir such that said characteristic of said gas spring system is adaptable to a torque applied to said torsional vibration damper, said pressure circuit comprising a plurality of pressure circuit components and at least one pressure transfer point communicating the gaseous medium under pressure between two of said pressure circuit components which are moveable relative to each other, wherein said pressure circuit comprises a first feed line, at least a portion of the takeoff, a second feed line connected to said reservoir, a first pressure transfer point providing a first connection between said first feed line and said at least a portion of said takeoff, and a second pressure transfer point providing a second connection between said at least a portion of said takeoff and said second feed line.
2 more elements
A torsional vibration damper for transmitting torque between a drive and a takeoff, said torsional vibration damper comprising:
- a drive-side transmission element connectable to the drive and rotatable about an axis of rotation;
- a takeoff-side transmission element connectable to the takeoff and rotatable about the axis of rotation;
- a damping device installed between said drive-side transmission element and said takeoff-side transmission element, wherein said takeoff-side transmission element is rotationally deflectable relative to said drive-side transmission element against an urgency of said damping device, said damping device comprising a gas spring system transmitting torque between said drive-side transmission element and said takeoff-side transmission element, said gas spring system having a reservoir containing gaseous medium, wherein a characteristic of said gas spring system being changeable in response to a pressure in said reservoir;
- and
- a pressure circuit connected to said reservoir of said gas spring system, said pressure circuit being actuatable to adjust a pressure in said reservoir such that said characteristic of said gas spring system is adaptable to a torque applied to said torsional vibration damper, said pressure circuit comprising a plurality of pressure circuit components and at least one pressure transfer point communicating the gaseous medium under pressure between two of said pressure circuit components which are moveable relative to each other, wherein said at least one pressure transfer point of said pressure circuit includes at least one of a bearing and a sealing element arranged between said two of said pressure circuit components which are moveable relative to each other.
2 more elements
A torsional vibration damper for transmitting torque between a drive and a takeoff, said torsional vibration damper comprising:
- a drive-side transmission element connectable to the drive and rotatable about an axis of rotation;
- a takeoff-side transmission element connectable to the takeoff and rotatable about the axis of rotation;
- a damping device installed between said drive-side transmission element and said takeoff-side transmission element, wherein said takeoff-side transmission element is rotationally deflectable relative to said drive-side transmission element against an urgency of said damping device, said damping device comprising a gas spring system transmitting torque between said drive-side transmission element and said takeoff-side transmission element, said gas spring system having a reservoir containing gaseous medium, wherein a characteristic of said gas spring system being changeable in response to a pressure in said reservoir;
- a pressure circuit connected to said reservoir of said gas spring system, said pressure circuit being actuatable to adjust a pressure in said reservoir such that said characteristic of said gas spring system is adaptable to a torque applied to said torsional vibration damper, said pressure circuit comprising an additional reservoir connectable with said reservoir of the gas spring system;
- and
- an oscillating compressor connected with said additional reservoir.
3 more elements
A torsional vibration damper for transmitting torque between a drive and a takeoff, said torsional vibration damper comprising:
- a drive-side transmission element connectable to the drive and rotatable about an axis of rotation;
- a takeoff-side transmission element connectable to the takeoff and rotatable about the axis of rotation;
- a damping device installed between said drive-side transmission element and said takeoff-side transmission element, wherein said takeoff-side transmission element is rotationally deflectable relative to said drive-side transmission element against an urgency of said damping device, said damping device comprising a gas spring system transmitting torque between said drive-side transmission element and said takeoff-side transmission element, said gas spring system having a reservoir containing gaseous medium, wherein a characteristic of said gas spring system being changeable in response to a pressure in said reservoir;
- a pressure circuit connected to said reservoir of said gas spring system, said pressure circuit being actuatable to adjust a pressure in said reservoir such that said characteristic of said gas spring system is adaptable to a torque applied to said torsional vibration damper, said pressure circuit comprising an additional reservoir connectable with said reservoir of the gas spring system;
- and
- at least one of supply reservoir and an expansion reservoir connectable to said additional reservoir.
3 more elements
A torsional vibration damper for transmitting torque between a drive and a takeoff, said torsional vibration damper comprising:
- a drive-side transmission element connectable to the drive and rotatable about an axis of rotation;
- a takeoff-side transmission element connectable to the takeoff and rotatable about the axis of rotation;
- a damping device installed between said drive-side transmission element and said takeoff-side transmission element, wherein said takeoff-side transmission element is rotationally deflectable relative to said drive-side transmission element against an urgency of said damping device, said damping device comprising a gas spring system transmitting torque between said drive-side transmission element and said takeoff-side transmission element, said gas spring system having a reservoir containing gaseous medium, wherein a characteristic of said gas spring system being changeable in response to a pressure in said reservoir;
- a pressure circuit connected to said reservoir of said gas spring system, said pressure circuit being actuatable to adjust a pressure in said reservoir such that said characteristic of said gas spring system is adaptable to a torque applied to said torsional vibration damper, said pressure circuit comprising an additional reservoir connectable with said reservoir of the gas spring system;
- and
- a first actuator selectively connecting said additional reservoir to said reservoir of said gas spring system.
3 more elements
A torsional vibration damper for transmitting torque between a drive and a takeoff, said torsional vibration damper comprising:
- a drive-side transmission element connectable to the drive and rotatable about an axis of rotation;
- a takeoff-side transmission element connectable to the takeoff and rotatable about the axis of rotation;
- a damping device installed between said drive-side transmission element and said takeoff-side transmission element, wherein said takeoff-side transmission element is rotationally deflectable relative to said drive-side transmission element against an urgency of said damping device, said damping device comprising a gas spring system transmitting torque between said drive-side transmission element and said takeoff-side transmission element and an additional spring system connected in series with said gas spring system, said gas spring system having a reservoir containing gaseous medium, wherein said gas spring system is connected with said drive-side transmission element and said additional spring system is connected with said takeoff-side transmission element, and wherein a characteristic of said gas spring system being changeable in response to a pressure in said reservoir;
- and
- a pressure circuit connected to said reservoir of said gas spring system, said pressure circuit being actuatable to adjust a pressure in said reservoir such that said characteristic of said gas spring system is adaptable to a torque applied to said torsional vibration damper,
- wherein said drive-side transmission element comprises a radial flange mounted nonrotatably with respect to the drive,
- said gas spring system comprising a drive-side primary control element connected to said drive-side transmission element and a takeoff-side primary control element, said takeoff-side primary control element comprising an intermediate transmission element between said gas spring system and said additional spring system, a cylinder space containing said reservoir of said gas spring system defined by drive-side primary control element, a piston moveable in a circumferential direction in said cylinder space, and a feed line leading to said reservoir, and
- wherein said cylinder space and said feed line are connected with said drive-side primary control element, and said piston is connected with said takeoff-side primary control element.
5 more elements
A torsional vibration damper for transmitting torque between a drive and a takeoff, said torsional vibration damper comprising:
- a drive-side transmission element connectable to the drive and rotatable about an axis of rotation;
- a takeoff-side transmission element connectable to the takeoff and rotatable about the axis of rotation;
- a damping device installed between said drive-side transmission element and said takeoff-side transmission element, wherein said takeoff-side transmission element is rotationally deflectable relative to said drive-side transmission element against an urgency of said damping device, said damping device comprising a gas spring system transmitting torque between said drive-side transmission element and said takeoff-side transmission element, said gas spring system having a reservoir containing gaseous medium, wherein a characteristic of said gas spring system being changeable in response to a pressure in said reservoir;
- a pressure circuit connected to said reservoir of said gas spring system, said pressure circuit being actuatable to adjust a pressure in said reservoir such that said characteristic of said gas spring system is adaptable to a torque applied to said torsional vibration damper;
- and
- an additional spring system connected in series with said gas spring system, wherein said additional spring system is arranged at a position in said torsional vibration damper that is essentially axially offset from said gas spring system.
3 more elements
A torsional vibration damper for transmitting torque between a drive and a takeoff, said torsional vibration damper comprising:
- a drive-side transmission element connectable to the drive and rotatable about an axis of rotation;
- a takeoff-side transmission element connectable to the takeoff and rotatable about the axis of rotation;
- a damping device installed between said drive-side transmission element and said takeoff-side transmission element, wherein said takeoff-side transmission element is rotationally deflectable relative to said drive-side transmission element against an urgency of said damping device, said damping device comprising a gas spring system transmitting torque between said drive-side transmission element and said takeoff-side transmission element, said gas spring system having a reservoir containing gaseous medium, wherein a characteristic of said gas spring system being changeable in response to a pressure in said reservoir, wherein said gas spring system comprises a cylinder defining a cylinder space containing said reservoir of said gas spring system, a piston moveable in a circumferential direction in said cylinder space, said piston comprising a piston rod and a plunger;
- and
- a pressure circuit connected to said reservoir of said gas spring system, said pressure circuit being actuatable to adjust a pressure in said reservoir such that said characteristic of said gas spring system is adaptable to a torque applied to said torsional vibration damper.
2 more elements
Dependencies are inferred from the claim text.