A method for balancing a shaft assembly having a shaft member. The method can include providing a balance weight having a body portion that is formed of a material that permits transmission of ultra-violet (UV) light therethrough, the body portion having a perimeter; applying an UV light-curable adhesive to at least one of the balance weight and the shaft member; positioning the balance weight to the shaft member such that the UV light-curable adhesive is abutted to the balance weight and the shaft member; and transmitting UV light through the balance weight to cure at least a portion of the UV light-curable adhesive that is disposed inwardly of the perimeter of the body portion.

A shaft balancing device for insertion into a shaft including a generally flat cylindrical band having an outer surface, an inner surface and a set of two crush points thereon. A balancing weight is attached to the outer surface of the band between the set of crush points. The device is inserted into the shaft and the crush points are plastically deformed radially outward creating spring force which holds the balancing weight to the inner surface of the shaft. The band has a curved connecting portion between the two crush points having a radius of curvature slightly greater than the curvature of the shaft. The balancing weight has a radius of curvature slightly greater than the radius of curvature of the curved connecting portion and slightly less than the radius of curvature of the shaft.

A shaft balancing device for insertion into a shaft including a generally flat cylindrical band having an outer surface, an inner surface and a set of two crush points thereon. A balancing weight is attached to the outer surface of the band between the set of crush points. The device is inserted into the shaft and the crush points are plastically deformed radially outward creating spring force which holds the balancing weight to the inner surface of the shaft. The band has a curved connecting portion between the two crush points having a radius of curvature slightly greater than the curvature of the shaft. The balancing weight has a radius of curvature slightly greater than the radius of curvature of the curved connecting portion and slightly less than the radius of curvature of the shaft.

Methods, apparatus, and systems for trapped rotatable weights to improve rotor balance are disclosed. An example apparatus includes a lock nut; a rotor assembly; a channel defined by the lock nut and the rotor assembly, the channel wrapped circumferentially around a geometric center of the rotor assembly; and a weight trapped within the channel.

A vibration-damping system for turbomachine blade(s) in a turbomachine is provided. Each turbomachine blade includes a platform having a radially inner surface. The system includes a spacer axially adjacent the platform of at least one turbomachine blade in the turbomachine, e.g., adjacent a turbomachine blade stage. The spacer includes a body. A damping element coupler is on the body of the spacer, and a vibration-damping element is configured to couple to the damping element coupler. The vibration-damping element and the damping element coupler are disposed to cause the vibration-damping element to engage the radially inner surface of the platform of the turbomachine blade(s) to dampen vibration of the turbomachine blade(s), e.g., during operation of the turbomachine.

A vibration-damping system for turbomachine blade(s) in a turbomachine is provided. Each turbomachine blade includes a platform having a radially inner surface. The system includes a spacer axially adjacent the platform of at least one turbomachine blade in the turbomachine, e.g., adjacent a turbomachine blade stage. The spacer includes a body. A damping element coupler is on the body of the spacer, and a vibration-damping element is configured to couple to the damping element coupler. The vibration-damping element and the damping element coupler are disposed to cause the vibration-damping element to engage the radially inner surface of the platform of the turbomachine blade(s) to dampen vibration of the turbomachine blade(s), e.g., during operation of the turbomachine.

A wheel for a vehicle has a wheel rim, a hub portion, and at least one spoke which connects the hub portion to the wheel rim, and also at least one cover element which at least partially covers the spoke region. The cover element is designed to, in the installed position thereof, produce an imbalance-free state of the wheel.

A vibration damping device equipped with a resonator mechanism comprising at least one resonator, the at least one resonator having a first beater extending from an embedded end to a free beating end. The resonator consists of an elastically deformable base equipped with a first branch and a second branch connected by a central section, the embedded end being embedded at the first branch, the first branch extending from a first end to a second end each rigidly fastened to a mount, the second branch extending from a first end section to a second end section each rigidly fastened to a vibration source.

A vibration damping device equipped with a resonator mechanism comprising at least one resonator, the at least one resonator having a first beater extending from an embedded end to a free beating end. The resonator consists of an elastically deformable base equipped with a first branch and a second branch connected by a central section, the embedded end being embedded at the first branch, the first branch extending from a first end to a second end each rigidly fastened to a mount, the second branch extending from a first end section to a second end section each rigidly fastened to a vibration source.

An absorber for damping torsional vibrations in a drive train of a vehicle. The absorber includes one or more absorber masses and an absorber carrier, able to be coupled to the drive train, for receiving the one or more absorber masses . The one or more absorber masses are guided in a movable manner by the absorber carrier to at least partially damp the torsional vibrations. In addition, the absorber includes a balancing plate for balancing the absorber, said balancing plate being coupled to the absorber carrier for conjoint rotation, and a displacer element . The displacer element surrounds the one or more absorber masses at least partially, in order at least to reduce any penetration of a fluid at least partially surrounding the absorber as far as the one or more absorber masses. The displacer element is fastened to the balancing plate.