Tooling for balancing a turbine engine module (10) in a balancing machine, the turbine engine module having at least one stator housing (14) and a rotor (16) having a shaft (18) with a longitudinal axis A and at least one blade stage (20) surrounded by the stator housing (14). The tooling has at least a balancing frame (14), having rotor (16) guide bearings, first and second annular plates (30, 32) designed to be attached to the stator housing (14), third and fourth attachment lugs (34, 36) provided on the balancing frame (24), to attach the first and second annular plates (30, 32) to the frame. A trolley is for transporting the frame (24), and a support (84, 94) for supporting the frame, provided on the balancing frame (24) and cooperating equally well with the balancing machine and with the trolley.

A damped automotive driveline component can be propshaft, a bar shaft, a torque tube housing, a power transfer unit (PTU) housing, or a final drive unit (FDU) housing, among other possibilities. The component is equipped with a dampener in order to dissipate vibration experienced during use of the component. The damper includes metal wire strands. Relative movement among the metal wire strand is believed to damp the vibrations.

A balance weight having one or more journals with a reduced mass portion disposed between a pair of journal portions that define circumferentially extending bearing surfaces. The reduced mass portion has a body, which defines a circumferentially extending bearing surface that is concentric with the bearing surfaces on the journal portions, and at least one stiffening structure that is configured to resist flexing of the journal portions relative to one another due to the transmission of bending loads through the balance shaft.

A device for balancing a rotor of a turbomachine comprises a base coaxially fixable to the rotor; at least three balancing tools arranged on the base, each balancing tool defines a respective balancing direction along a radial direction of the base, each balancing tool comprises a weight moveable along the balancing direction; the balancing directions are uniformly angularly spaced.

A damped propshaft assembly with a hollow shaft and a tuned damper, which is received in the hollow shaft and includes a liner and a damping member. The liner's mass and stiffness are tuned to attenuate one or more of a bending mode vibration and a torsion mode vibration that occurs at a first predetermined frequency. The liner is not configured to substantially damp shell mode vibration that occurs at a frequency that is not equal to the first predetermined frequency. The damping member is coupled to the liner and is configured to primarily attenuate shell mode vibration in the hollow shaft at one or more desired frequencies. The tuned damper attenuates the at least one of the bending moment vibration and the torsion mode vibration at the first predetermined frequency and also attenuates shell mode vibration. A method for forming a damped propshaft assembly is also provided.

A balancing method for a rotating part device including a nut having an internal thread, and a countersunk collar is disclosed. The countersunk collar has a through-hole with a diameter greater than the diameter of the internal thread of the nut. The countersunk collar includes a balancing weight.

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 vibration damping device is configured to reduce vibration that causes lateral flexing of an elongated member that extends along a centerline. The device includes a split sleeve co-extending with and disposed about the elongated member, and a spring that extends about the sleeve and exerts a force that biases the sleeve radially inward.

A computer program and method for pre-balancing a crankshaft. The method includes receiving data related to a three dimensional scan of the crankshaft; generating a model based on the data; and providing instructions, based on the model, for defining a pre-balancing machining axis.

The subject matter of the present disclosure can help provide solutions to problems associated with eccentricities between mounting components in rotating gas turbine engine components, such as by providing a simulator component for balancing with an actual component outside of a gas turbine engine installation. The simulator component can allow for balancing of the actual component cumulatively with the simulator component for later installation of the actual component into a gas turbine engine with a simulated component simulated by the simulator component. The simulator component can have rotational dynamic properties, e.g., the same center of gravity and a scaled diametral moment of inertia, relative to the simulated component.