726results about "Rotating bodies balancing" patented technology

A driveshaft assembly includes a yoke including a body portion, a pair of opposed yoke arms that extends generally in a first axial direction from the body portion, and a neck portion that extends generally in a second axial direction from the body portion. A driveshaft tube is secured to the neck portion of the yoke, such as by magnetic pulse welding. A ring is secured to the body portion of the yoke, such as by press fitting, and a balance weight is secured to the ring, such as by welding.

A method and device for reducing vibratory noise in a system with an integral rotating member includes independently operable drive means for controlling the angular velocity of at least two masses. Control signals manipulate the drive means to allow each mass to rotate at optimal speed, direction and phase for reducing the noise induced in the system by the rotating member.

A wheel balance weight attached to a wheel of an automobile. The weight body has an engaging groove with which one end portion of the engaging member engages. Opened end portions of the weight body defining the engaging groove are caulked over the one end portion to form pawl portions. Thus, the one end of the engaging member is fixed to the engaging groove of the weight body.

The present invention relates to the automatic balance adjusting centrifuge that enhances the efficiency of space utilization by simplifying the structure as well as supports a precise movement by improving the structure of the balance weight transport apparatus in the automatic balance adjusting centrifuge that compensates the unbalance of the centrifugal force by transferring the balance weight equipped in the rotor rotational arm.

According to the automatic balance adjusting centrifuge of the present invention, the structure is simplified as well as the precise and exact transfer of the balance weight is possible by connecting the balance weight with the axis of the motor directly and adopting the length sensor. Furthermore, the efficiency of space utilization is enhanced because the axis of rotation of the balance weight transfer motor is in radial direction of the rotational arm.

An active balancer for dynamically balancing a rotating machine is provided. The active balancer has a balancer body which rotates with the rotating machine and at least one controllable position counter weight having a real-time adjustable position relative to the balancer body and the rotating machine inorder to produce an actively adjustable controllable counter weight balance force for dynamically balancing the rotating machine. The active balancer includes a spring with the balancer body mounted to the rotating machine through the spring wherein the balancer body mass resonates on the spring with a torsional vibration canceling frequency which cancels a torsional vibration of the rotating machine.

A process for balancing a vehicular driveline including a propeller shaft and an input shaft of a vehicle axle interconnected by a universal joint. First, the vehicle propeller shaft is balanced to a predetermined residual imbalance having an imbalance vector angle of 0° or 180° which lies inline with open set of cardan joint trunnions. The corrected residual imbalance is then visually marked. Next, the input shaft is balanced to a predetermined residual imbalance having an imbalance vector angle of 0° or 180° which lies inline with cross-holes in yoke ears. Again, the corrected residual imbalance on the input shaft is then visually marked. During the assembly of the vehicle, the assembly line operator couples the propeller shaft to the input shaft through a cardan joint cross by aligning the marks on the propeller shaft and the input shaft so that the marks are located opposite to each other.

A washing machine which improves performance of balancers, and a control method thereof. The washing machine includes a drum accommodating laundry and rotated by rotary force transmitted from a drive source, balancer housings mounted on the drum, each of the balancer housings including a disc-shaped channel formed therein, balancing modules movably disposed in the channels of the balancer housings, vibration sensors to sense unbalance applied to the drum during rotation of the drum, position sensors to sense the positions of the balancing modules, and a controller controlling movement of the balancing modules to positions to compensate for the unbalance sensed by the vibration sensors.

A vibration suppressor system includes an annular electric motor system which independently controls rotation of at least two masses about the axis of rotation to reduce in-plane vibration of the rotating system. A method of reducing vibrations in a rotary-wing aircraft includes independently controlling a relative angular position of a multiple of independently rotatable masses to reduce vibrations of a main rotor system.

A disk drive is realized, which omits running-in for stabilizing a change in a correcting function produced by sliding between balls and a rolling groove in an unbalance correcting mechanism, and prevents immobility and straying of balls, and which comprises a unit mechanism assembled by using 12 balls subjected to surface treatment with heptadecafluorodecyltrimethoxysilane and a turntable plated with a chemical nickel plating containing phosphorus and boron to have a thickness of 5 mum and by injecting 1 microliter of ester oil into the rolling groove, and further comprises a recess formed in a sidewall of the rolling groove of the unbalance correcting mechanism to prolong the service life of the correcting function.

Disclosed is a washing machine having ball balancers, which adjust a relation between a gap, between the inner wall of a racer of each of the ball balancers and balls, and viscous oil, so as to reduce the vibration and noise of the washing machine. Each of the ball balancers of the washing machine includes balls and viscous oil accommodated in a racer, and the viscosity of the viscous oil is varied in proportion to a gap between the racer and the balls. When the viscosity of the viscous oil is 1˜100 cSt, the gap is set to 0.5˜1.0 mm, when the viscosity of the viscous oil is 100˜380 cSt, the gap is set to 1.0˜2.0 mm, and when the viscosity of the viscous oil is 380˜1,000 cSt, the gap is set to 2.0˜3.0 mm. Thereby, the relation between the gap and the viscous oil is optimized, and the ball balancers effectively exhibit a balancing function and thus minimize the vibration and noise of the washing machine.

A balance assembly for turbine rotating components, such as turbine rotors, as well as method for installing and/or adjusting at least one balance weight in the balance assembly and turbine section having this balance assembly and a radially extending access pathway for accessing this balance assembly. The balance assembly comprises; (a) a balance weight retention member having a circumferential periphery and a slot formed therein along at least a portion thereof, the slot having: (1) a bottom surface; (2) an opening; and (3) a pair of spaced apart and opposed side walls connecting the bottom surface and the opening, the side walls sloping inwardly between the bottom surface and the opening to define a balance weight engaging section; (b) at least one balance weight configured and sized to be insertable through the opening of the slot and to be positionable for movement within the slot and having a pair of spaced apart generally inwardly sloping shoulder surfaces capable of engaging the side walls of the slot at the balance weight engaging section; and (c) a balance weight securing member associated with the at least one balance weight that can be actuated to: (1) move the at least one balance weight away from the bottom surface so that the shoulder surfaces engage the side walls at the balance weight engaging section such that the at least one balance weight is in a secured position within the slot; or (2) move the at least one balance weight towards the bottom surface so that the shoulder surfaces do not engage the side walls at the balance weight engaging section such that the at least one balance weight is in a unsecured position within the slot.

A bond of a rubbery component to a virgin surface of a tire's cured innerliner which virgin surface has never been contaminated by the remnants of a release agent left after buffing with a wire brush and solvent-cleaning the cured innerliner, is unexpectedly stronger than a bond of the component to the contaminated but “cleaned surface”, cleaned as indicated. As an alternative, buffing with a wire brush results in a textured surface that impairs adhesion of a balance pad. Therefore, a pneumatic tire is provided with a virgin surface protected against contamination by a release agent at the curing temperature of the tire; protection is provided by a self-supporting barrier film of sulfur non-vulcanizable, expandable, thermoformable synthetic resinous material; and, a method is provided for maintaining a virgin cured surface within all or part of either the exterior or interior of a pneumatic tire's rubber carcass which is conventionally cured. The barrier film which is substantially inextensible at ambient temperature, is removable without tearing into pieces from the protected surface of the cured tire. When the interior surface is provided by an innerliner, any component to be included within the interior of the carcass may be adhesively secured to the virgin surface of the innerliner more securely than has been heretofore possible.

A balancing method and apparatus is used for dynamically balancing an out of balance condition in a rotating body caused by resistance forces acting tangentially to the body. A device having a rotatable component and automatic or dynamic balancing includes a housing, a shaft rotatably mounted in the housing, the shaft supporting the component near one end of the shaft, at least one counterweight fixedly mounted on the shaft and at least one automatically adjusting balancer mounted on the shaft. The automatically adjusting balancer includes one or more compensating masses contained to move about a path relative to the shaft to compensate for variable imbalanced forces acting on the component.

Disclosed herein is a wheel balancing device having a plurality of wheel balancing weights attached to a top surface of an elongate tape, and a backing strip removably attached to and protecting an adhesive layer on the bottom surface of the tape. The backing strip is serrated below the grooves separating the individual wheel balancing weights to facilitate separation of the individual weights quickly and easily. Each backing strip serration may be in the shape of a lift tab or finger grip to further ease removal of the backing strip from the adhesive layer on the bottom surface of the tape.

A laundry treatment apparatus including a rotatable drum in which laundry is stored, at least three balancers mounted to the drum so as to be spaced apart from one another by the same angle around a rotation center of the drum. Liquid is introduced into and discharged from the balancers via a feeder supplying the liquid and a flow path structure mounted to the drum to guide liquid supplied from the feeder to the balancer located in a direction for removal of unbalance of the drum.

The invention relates to a tomography device (1), especially an X-ray computer tomography device or ultrasound tomography device, comprising a balancing device (23; 45) for reducing an imbalance (61) that was determined by means of the measuring system (2) rotating about an axis of rotation (4). The balancing device (23; 45) comprising means mounted on the measuring system (2) for variably positioning a balancing mass and a control device (25) acting upon said means and designed in such a manner that the balancing mass, controlled by the control device (25), can be positioned in a location appropriate to reduce the imbalance (61). The balancing mass can be configured as a liquid (F) that is positioned in a liquid-tight channel. The invention also relates to a balancing method according to which a mass (m) of a liquid quantity balancing the imbalance (61) is determined and a magneto- and/or electro-rheological liquid (F) is introduced into an annular channel (31; 71; 81, 83, 85) in such a quantity that for the subsequent operation a quantity of liquid (F) dependent on the determined mass (m) is present in the annular channel (31; 71 81, 83, 85).

An object is to provide a rotary fluid element and a method of correcting unbalance of a rotary fluid element, whereby unbalance of the rotary fluid element can be corrected multiple times in a necessary and sufficient amount without sacrificing strength of blades. A rotary fluid element includes: a plurality of blades extending in a centrifugal direction on an outer peripheral surface of a boss portion and disposed at intervals in a circumferential direction; and a cut-remove portion for reducing unbalance disposed in a blade gap between the blades adjacent in the circumferential direction. The cut-remove portion includes a first cut-remove portion which is cut and removed on a radially-outer rim portion between the blades, and an additional cut-remove portion which is cut and removed on a radially-inner portion disposed inside the first cut-remove portion with respect to a radial direction.