Back to results
US 7,438,165 B2Granted
Torsional vibration damper of a rotating shaft
OwnerGeorge Nerubenkoinventor
Life of this patent
Estimating the term…
Abstract
This invention is directed at torsional vibration dampers of a rotating shaft. The dampers of the invention provide self-tuning to dampen harmonics, over a broad range of shaft angular velocities. Where the shaft rotates with an angular velocity about a longitudinal axis, and rotates perpendicular to a plane of rotation, the damper comprises: at least one passive damping element, and one controlling damping element.
Claims20
A damper for mitigating torsional vibrations of a shaft rotating with an angular velocity, said damper comprising:
- a generally circular ring surrounding said shaft and rotatable therewith;
- and
- at least two generally diametrically opposite spring and mass arrangements, each of said spring and mass arrangements comprising:
- a first spring coupled at one end to said ring and being radially inwardly oriented toward said shaft;
- and
- a mass coupled to said shaft via a second radially oriented spring, said mass oscillating in a direction generally perpendicular to the axes of said first and second springs,
- wherein oscillation of said masses dampens torsional vibrations of said shaft corresponding to a frequency of said oscillation, the mass of each spring and mass arrangement being moveable radially along the first spring of the same spring and mass arrangement in response to changes in the angular velocity of said shaft thereby to adjust the spring constant of that first spring.
4 more elements
A damper for ameliorating torsional vibrations of a shaft rotating with an angular velocity, said damper comprising:
- a ring-like element surrounding said shaft and rotatable therewith;
- and
- at least two damping arrangements oriented in generally opposite radial directions and coupling said ring-like element to said shaft, each said damping arrangement comprising:
- a mass;
- a radially inwardly oriented first spring element coupled to said ring-like element;
- and
- a radially oriented second spring element coupled to said mass and to said shaft, the mass of each damping arrangement oscillating in a direction perpendicular to the radial direction of said damping arrangement thereby to dampen torsional vibration of said shaft, the mass of each damping arrangement being moveable radially along the first spring element of the same damping arrangement in response to velocity changes of said shaft to change the effective length of that first spring element and thereby adjust its spring constant.
4 more elements
Dependencies are inferred from the claim text.