Torsional vibration damper
AssigneeUlrich Rohs
InventorsUlrich Rohs, Dietmar Heidingsfeld
Life of this patent
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Abstract
A device for damping torsional vibration of a drive shaft with a liquid damping medium including a primary gear connected to the drive shaft. A secondary gear supports a series of planetary gears in meshed connection with the primary gear. The revolving primary gear and the planetary gears form a gear pump for closed circulation of the liquid damping medium through pressure ducts. The device further includes a control device for controlling the flow rate of the liquid damping medium based on the rotational speed of the primary gear.
Claims22
A device with a liquid medium for damping torsional vibration of a drive shaft, the device comprising:
- a revolving, primary gear connected to the drive shaft and including bevel gear teeth;
- a plurality of planetary gears, each having a central axis of revolution radially aligned with the drive shaft and a frustoconical shape with a cross sectional area increasing in a direction away from the drive shaft;
- and
- a driven, revolving secondary gear having a planetary gear carrier including a plurality of pockets formed therein for supporting said plurality of planetary gears devoid of axle journals in meshed connection with said bevel gear teeth,
- said revolving primary gear and said plurality of planetary gears forming a gear pump for closed circulation of the liquid damping medium through pressure ducts, and
- said primary gear and said secondary gear forming a sealed housing, including
- (i) an intake space for containing the liquid damping medium,
- (ii) means for controlling a flow rate of the liquid damping medium based on the number of revolutions per unit time, said control means being located between the intake space and the pressure ducts, and
- (iii) means for eliminating pressure peaks.
A device with a liquid medium for damping torsional vibration of a drive shaft, the device comprising:
- a revolving, primary gear connected to the drive shaft and including bevel gear teeth;
- a plurality of planetary gears, each having a central axis of revolution radially aligned with the drive shaft and a cylindrical shape;
- and
- a driven, revolving secondary gear having a planetary gear carrier including a plurality of pockets formed therein for supporting said plurality of planetary gears devoid of axle journals in meshed connection with said bevel gear teeth,
- said revolving primary gear and said plurality of planetary gears forming a gear pump for closed circulation of the liquid damping medium through pressure ducts;
- and
- said primary gear and said secondary gear forming a sealed housing, including
- (i) an intake space for containing the liquid damping medium,
- (ii) means for controlling a flow rate of the liquid damping medium based on the number of revolutions per unit time, said control means being located between the intake space and the pressure ducts, and
- (iii) means for eliminating pressure peaks.
Dependencies are inferred from the claim text.