Abstract: A propeller balancing device includes at least one stationary outer disc and a drive wheel arranged adjacent to the outer disc. The drive wheel includes magnets arranged at the periphery. A balancing weight is arranged in a groove formed in one of the outer disc or the drive wheel. A propeller including the propeller balancing device and a method of balancing a propeller are also disclosed.

Abstract: A rotor disc, such as one made of a damage intolerant material or other material sensitive to stress concentrations, has at least one balancing assembly which includes a plurality of circumferentially spaced-apart sacrificial protrusions projecting between adjacent stress-relieving slots. Selective material removal is permitted from the rotor disc, while managing stress concentrations in the rotor disc created by such material removal, such that the rotor disc may be balanced without detrimentally affecting its service life.

Abstract: An imaging tomography apparatus, in particular an x-ray tomography apparatus or an ultrasound tomography apparatus, has a stationary unit with a sensor for measurement of an out-of-balance condition of an annular data acquisition device rotatable around a patient opening in the stationary device. Compensation weights for compensation of the out-of-balance condition are provided on the data acquisition device. To simplify the balancing procedure, the compensation weights are disposed in two parallel planes axially separated from one another, and in each plane at least three compensation weights are fashioned as chambers that can be filled with a fluid. At least two of the chambers are connected with one another via at least one conduit for fluid transfer therebetween exchange.

Abstract: A method for balancing a spindle assembly for compensating for dynamic imbalance of the spindle assembly. The method uses a plurality of adjustable eccentric rings for dynamically balancing the spindle assembly. The plurality of eccentric rings are preassembled with the spindle assembly and the method includes the steps of measuring an imbalance of a combination of the spindle assembly and the eccentric rings preassembled with the spindle assembly and balancing the spindle assembly by adjusting the eccentric rings based upon a measured imbalance of the combination of the spindle assembly and the eccentric rings.

Abstract: The present invention provides a method and apparatus for balancing vehicle driveshafts. One embodiment of a method according to the present invention comprises analyzing a driveshaft and determining a balancing vector to counter any imbalance in the driveshaft. A determination is then made of the appropriate location on the driveshaft for mounting a weight to counter said imbalance and the weight is mounted to the driveshaft. An apparatus for balancing a driveshaft according to the present invention comprises one or more primary balancing weights capable of being mounted to pinion flange holes in a vehicle driveshaft. One or more secondary balancing weights are also included, each of which is capable of being mounted to, or held by, one of the primary weights. The primary weights and secondary weights are mounted to the pinion flange to provide a weight to counter any imbalance in the driveshaft.

Abstract: A method of balancing a disk pack for use in a disk drive according to an aspect of the present invention. The disk pack includes a spindle motor and a rotatable disk. The spindle motor is configured to rotate the disk about an axis of rotation of the spindle motor. The spindle motor has a spindle motor imbalance location indicia upon the spindle motor indicative of a location of a spindle motor location imbalance. The method includes detecting the spindle motor imbalance location indicia. The method further includes placing the disk upon the spindle motor. The method further includes attaching the disk to the spindle motor with the disk being off-set from the axis of rotation based upon the detected spindle motor imbalance location indicia for balancing the disk pack by producing a disk off-set imbalance in relation to the axis of rotation.

Abstract: The drum has a balancer disposed at both ends of a drum body around which a printing plate is wound, and with a rotating shaft rotatably supported by a supporting plate via an elastic support member of a shaft receiving member. When the rotating drum is rotated in a state in which the rotating drum is out of balance, the elastic support member is elastically deformed so that the rotating shaft rotates integrally with the rotating drum. Balance of the drum is restored by eccentric revolution of the balancers, whereby the rotating drum is rotated around a center of the rotating shaft. A recording head is mounted at a bracket that moves integrally with the rotating drum. Thus, the recording head continually opposes a fixed position at the rotating drum, and an appropriate image can be formed on a printing plate.

Abstract: The present invention provides a method and apparatus for balancing vehicle driveshafts. One embodiment of a method according to the present invention comprises analyzing a driveshaft and determining a balancing vector to counter any imbalance in the driveshaft. A determination is then made of the appropriate location on the driveshaft for mounting a weight to counter said imbalance and the weight is mounted to the driveshaft. An apparatus for balancing a driveshaft according to the present invention comprises one or more primary balancing weights capable of being mounted to pinion flange holes in a vehicle driveshaft. One or more secondary balancing weights are also included, each of which is capable of being mounted to, or held by, one of the primary weights. The primary weights and secondary weights are mounted to the pinion flange to provide a weight to counter any imbalance in the driveshaft.

Abstract: A moving-weight, dynamic balancing apparatus for a rotary machine, in particular an industrial fan, having a rotary shaft, and at least one rotor carried by the rotary shaft and provided with main rotor bearings to allow rotary movement thereof. The balancing apparatus includes at least one moving-weight balancing unit is carried by the rotary shaft, and at least one monitoring and correcting system having a drive assembly. The at least one monitoring and correcting system monitors and corrects the unbalanced state of the rotor, and acts continuously on the at least one moving-weight balancing unit when the rotor is rotating to monitor and correct for rotor unbalance. The at least one moving-weight balancing unit has at least two balancing masses mounted to be movable under drive from the drive assembly controlled by the monitoring and correction system.

Abstract: A system for balancing devices having motors and rotating masses to be coupled to the motors utilizes a momentum transfer mechanism to shift the rotating mass based on sensed imbalance. In this manner the mass is shifted to a position which accounts for the inherent imbalance in both the motor and the mass. A controller receives imbalance information from a velocity sensor and controls a solenoid to strike a base coupled to the motor to shift a lightly clamped mass relative to the motor. In one embodiment, a disk drive has disks initially biased by the system against a hub, and then shifted during rotation to create a disk drive having concentrically aligned disks offsetting imbalance inherent in a motor used to rotate the disks. In one embodiment, the disks are held to the hub by a clamp having screws. The screws are driven simultaneously through the same angle of rotation to ensure that the axial clamping force of each one is substantially equal.

Abstract: An apparatus for unbalanced compensation of a grinding wheel which is rotatable about an axis of rotation, with compensating weights which are guided rotatably about the axis of rotation of the grinding wheel with symmetrical mass distribution relative to a central plane of the grinding wheel which is perpendicular to the axis of rotation. A positioning mechanism is provided for different angular positionings of the compensating weights. The compensating weights are mounted for rotation through 360.degree. about the axis of rotation at different radii, the product of the mass of each compensating weight and its associated radius being equal to the product of the mass of each other compensating weight and its associated radius.

Abstract: For balancing a rotating component, in particular a component arranged in the drive train of a motor vehicle such as a flywheel, for example, it is proposed that an incomplete mass ring is attached to the component, in which the gap is dimensioned so that it corresponds to the magnitude of the imbalance measured at the component and is arranged in the angle position of the measured imbalance.

Abstract: A method of and an apparatus for balancing a multi-bay cabler system when less than all of the cabler frame bays are supplied with a supply bobbin are disclosed. The apparatus comprises a mechanical counterweight system which compensates for a depleting strand supply during operation of the cabler system, thereby equalizing centrifugal loading within the rotating strander frame and maintaining its dynamic balance at full design speed during the cable assembly operation. The counterweight system is installed in a bobbin-carrying cradle of an unused cabler frame bay. According to a first embodiment, the counterweight is driven in a linear path relative to the cradle in a direction normal to the rotational axis of the cabler frame. According to a second embodiment, the counterweight is driven in an arc relative to its supporting cradle.

Abstract: A skewer assembly (12) that incorporates a counterbalancing device (42) for use with a barbecue grill (10) or other rotisserie assembly includes a generally rectangular shaft (20) that has a handle (22) releasably secured to one end thereof through a releasable end piece (24). The counterbalancing device (42, 42a) has a counterweight (15, 62) on one free end thereof and an elongated slot (48, 60) intermediate opposite ends. A threaded stud (32) forming part of and extending outwardly from the main body (30) of the end piece (24) is threaded through the elongated slot (48,60) of the counterbalancing device (42,42a) and into a threaded opening (34a) extending inwardly into the shaft (20) to frictionally grip the counterbalancing device (42,42a) between an abutment (40) on the handle (22) and an abutment (36) on the end piece (24).

Abstract: For a body rotating on an axis and having a moment of inertia relative to the axis, an apparatus for dynamically suppressing unwanted rotational phenomena occurring relative to the axis of rotation, i.e., phenomena which exhibit themselves in a body only when the body is rotating about the axis, such as, dynamic imbalance and resonance at critical rotational speeds. One or more inertial masses are movably affixed to the body such that they can be selectively moved radially and circumferentially with respect to the axis. Appropriately placed sensors, such as strain gauges, accelerometers, vibration transducers, and the like detect the phenomena and pass pertinent parameters of the phenomena to a controller, preferably a computer, which analyzes the parameters to determine, among other things, the magnitudes of the phenomena.

Abstract: The unbalance in rotating equilibrium of a rotating body is corrected by carrying out a padding welding on the rotating body.The correction of the unbalance is carried out, first, by determining a position and an amount to be padded on the rotating body on the basis of measurements on a bearing of the rotating unbalance and an unbalanced mass and then by carrying out the padding welding in a predetermined amount at a predetermined position while varying a relative position between the rotating body and the padding welding means.This enables a full automation of the unbalance correction of a rotating body.

Abstract: A method of dynamically balancing an assembly of a metal jig and a ceramic rotor attached thereto, the ceramic rotor having a shaft portion, and the metal jig having at its one axial end a fixing hole, comprising the steps of: inserting the shaft portion of the ceramic rotor into the fixing hole of the metal jig, and thereby fixing the ceramic rotor to the metal jig to provide the assembly; and dynamically balancing the assembly by fixing at least one balancing piece in at least one of a plurality of balancing holes which are formed in the metal jig, the balancing holes being open in an outer surface of the metal jig. Also disclosed is a metal jig of a generally cylindrical shape for rotating a ceramic rotor in a dynamically balanced condition, having a fixing hole in its one axial end portion, in which a shaft portion of the ceramic rotor is inserted and fixed.

Abstract: A counterbalance device for a rotary shaft comprises a sleeve member in the form of a short tubing or a handle which can be mounted on the rotary shaft. The sleeve member has an extension rear portion adapted to receive a bushing member to be mounted thereon. The bushing member is provided with at least two aligned openings. A rod can be inserted through these openings and be mounted on the bushing member by a set screw. At least one counterbalance weight can then be mounted on the rod to provide counterbalance for uneven weight distribution with respect to the longitudinal axis of the rotary shaft.

Abstract: A process for balancing a crankshaft having pin portions and associated balancing weight parts which counterbalance the pin parts comprising welding masses to the balancing weight parts to compensate for unbalance of the crankshaft. The welding takes place after the crankshaft has been heat treated. The weld masses are directly formed on opposite sides of peripheral surfaces of the balancing weight parts without any preliminary formation of grooves in the peripheral surfaces for the weld masses.