Abstract: A balancing device, particularly for turbocompressors, comprising a base structure which supports elastically a supporting structure which has a flange for supporting a receptacle of a rotating element and a rotating element, wherein the rotating element can move with a rotary motion about its own rotation axis; actuation elements being adapted to actuate lever elements along a substantially radial direction; the lever elements being adapted to generate a force for fixing the receptacle of the rotating element to the supporting flange in a direction that is substantially parallel to the rotation axis.

Abstract: A balancing method, particularly for turbocompressors, performed with a balancing device having a base structure which elastically supports a supporting structure having a flange for supporting a receptacle of a rotating element and a rotating element. The balancing device further includes an actuator—adapted to actuate a lever along a substantially radial direction, the lever being adapted to generate a force for fixing the receptacle to the flange. The method includes the following steps: accommodating the receptacle and the rotating element in the supporting structure; translating the lever with the actuation means which operate along a substantially radial direction; and rotating the lever, by operating the actuator, the lever being adapted to generate a force for fixing the receptacle to the flange.

Abstract: The invention relates to a balancing machine for measuring the rotating unbalance of a tool holder in two different clampings, comprising a spindle which can be set into rotation. The spindle comprises an automatically actuatable coupling, by which the tool holder can be coupled rigidly to the spindle in a first position in order to rotate with the spindle around the rotational axis of the tool holder and the tool holder can be coupled rigidly to the spindle in a second position in order to rotate with the spindle around the rotational axis of the tool holder. The balancing machine also comprises at least one measuring sensor for determining the rotating unbalance of the tool holder rotating in the spindle unit, wherein the device has a brake which retains the tool holder.

Abstract: A balancing machine for rotating bodies, particularly for wheels of motor vehicles and the like, including a rotating shaft supported by a supporting element which is connected rigidly to the frame of the balancing machine, at least one first measurement transducer and one second measurement transducer being coupled elastically, along perpendicular planes, to an extension of the supporting element, an actuation motor being connected to the rotating shaft by means of a belt, the actuation motor being connected on an extension of the supporting element, and the extension connecting the rotating shaft to the measurement transducers.

Abstract: A solution is provided for tuning the frequency of a torsional mode of interest of a rotating body (such as a generator rotor torsional mode) by adding a detuner to act as an undamped torsional vibration absorber. The detuner may be coupled to an overhung shaft extending from the rotating body. The detuner may be modular, therefore weight can be added or subtracted easily from the detuner in order to adjust the stiffness and/or inertia of the overhung shaft. This change in stiffness and/or inertia yields a torsional frequency of oscillation in the overhung shaft substantially similar to the natural frequency of the torsional mode of interest of the rotating body, therefore forcing the frequency of the torsional mode of interest of the rotating body above or below its torsional natural frequency.

Abstract: A reference vibrator 10 of the present invention includes: a vibrator body 11 configured to mount to a mount 4 in an unbalance measurement device 1 to which a rotary product is mounted at the time of unbalance measurement, in a same mounting state as the rotary product; a vibration generator 12 fixed to the vibrator body 11 and that applies vibrations to the vibrator body 11; and a control unit 13 that controls the vibration generator 12. Because vibration is caused by the vibration generator 12 fixed to the vibrator body 11, repeatability of vibration force is high. This makes it possible to apply vibrations for repeatability check to the unbalance measurement device 1 with an accurate vibration force. Thus, variations in vibration force can be eliminated, and the repeatability of the unbalance measurement device 1 can be properly checked.

Abstract: The present invention is based on imparting of oscillatory motion to a rotor and to a coaxial balanced body relative to a fixed point selected at the common axis of the rotor. To eliminate an interference of imbalance datum planes on the parameters to be measured, at one stage of measurements the fixed point is used as the crossing point of the rotor axis with one of the imbalance datum planes, whereas at the next stage the rotor is along its axis by a fixed distance to a second position. The measured parameters are used to determine imbalance parameters in two imbalance datum planes.

Abstract: In a rotor bearing arrangement for a balancing machine having a bearing housing (1) which is supported in a radially resilient manner in a highly stiff bearing stand (2) by means of at least two identically configured and arranged spring elements, the spring elements are arranged on opposite sides of the bearing housing (1) so as to be symmetrical about a plane containing the main axis of the bearing and the bearing stand (2) has two supporting arms (11) arranged at a distance from one another, between which the bearing housing (1) is arranged and on which the spring elements are supported.

Abstract: Dynamically measuring the unbalance of a rotor arranged in a device housing (1) and rotating at high angular velocity, wherein the rotor is supported in a separate bearing housing (14), involves the following steps: fastening the bearing housing (14) on the device housing (1) with interposition of resiliently yielding elements (6) so that the bearing housing (14) can be moved relative to the device housing (1) in at least two spatial dimensions and the rotor is arranged in a working position in the device housing (1) suitable for driving, accelerating the rotor, measuring the vibrations induced by unbalance while the rotor rotates at a substantially normal working speed, determining the phase position of the induced vibrations to the relative position of the rotor at the measuring speeds, and using the measured vibrations and the phase position to determine the unbalance of the rotor to be compensated.

Abstract: Provided is a dynamic balancing apparatus using a simple harmonic angular motion, including a rotational shaft on which a rotational body having an unbalanced mass is installed; a simple angular motion generator for periodically vibrating the rotational shaft; a support for supporting both sides of the rotational shaft; an angular vibration measuring sensor for measuring the simple harmonic angular motion of the rotational shaft; and force or vibration transducers for measuring applied force acting on or vibration transferred to the support by means of the simple harmonic motion of the unbalance mass.

Abstract: Dynamically measuring the unbalance of a rotor arranged in a device housing (1) and rotating at high angular velocity, wherein the rotor is supported in a separate bearing housing (14), involves the following steps: fastening the bearing housing (14) on the device housing (1) with interposition of resiliently yielding elements (6) so that the bearing housing (14) can be moved relative to the device housing (1) in at least two spatial dimensions and the rotor is arranged in a working position in the device housing (1) suitable for driving, accelerating the rotor, measuring the vibrations induced by unbalance while the rotor rotates at a substantially normal working speed, determining the phase position of the induced vibrations to the relative position of the rotor at the measuring speeds, and using the measured vibrations and the phase position to determine the unbalance of the rotor to be compensated.

Abstract: In order to be able to determine the imbalance of rotors (2) with pocket hole bores with great precision in a bearing arrangement with a bearing mandrel (5) for holding a rotor (2), without journals but having a bore (6), in a balancing device, in which the bearing mandrel (5) has orifices (10, 20) for the passage of fluid, a fluid supply to a fluid chamber (40) disposed between the end of the pocket hole bore and the end of the bearing mandrel is provided to form a cushion of fluid with which the rotor is supported in the axial direction.

Abstract: In the case of a bearing with a bearing mandrel for mounting a journal-less rotor with a bore hole in a balancing device, in which the bearing mandrel has openings for fluid to pass through, to be able to determine the imbalance of rotors with bearing possibilities on only part of their axial extent with high precision, in the bearing mandrel first openings for fluid delivery and second openings for liquid removal are provided.

Abstract: An exemplary compressor wheel includes a proximate end, a distal end, an axis of rotation, a z-plane positioned between the proximate end and the distal end, and a joint having an axis coincident with the axis of rotation and an end surface positioned between the z-plane and the distal end. Other exemplary joints, compressor wheels, chambers, systems and/or methods are also disclosed.

Abstract: A vacuum system comprising: 1) an ion pump; 2) power supply; 3) a high voltage DC—DC converter drawing power from the power supply and powering the vacuum pump; 4) a feedback network comprising an ammeter circuit including an operational amplifier and a series of relay controlled scaling resistors of different resistance for detecting circuit feedback; 5) an optional power block section intermediate the power supply and the high voltage DC—DC converter; and 6) a microprocessor receiving feedback information from the feedback network, controlling which of the scaling resistors should be in the circuit and manipulating data from the feedback network to provide accurate vacuum measurement to an operator.

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: Balancing machine comprising a shell or frame (3) suspension-mounted on a bed (2) via elastic supports, a shaft (8) rotatably supported by said frame at two points spaced a predetermined distance apart and having that end emerging from the bed provided with means (80) for locking a wheel (11), drive means for rotating said shaft, and force transducer means (33) applied between the bed and the shaft, characterised in that the drive means are rigid with the suspension-mounted frame, between the bed (2) and frame (3) there being interposed an elastic support comprising at least two coplanar leaf springs (4, 5) symmetrical about the shaft axis and positioned in a plane perpendicular to the plane containing the axes of said drive means, of said shaft and of said transducer means.

Abstract: An apparatus for determining the unbalance of a rotational body includes a central mounting plate with a mounting fixture on which the rotational body is received, an outer frame, and a plurality of supporting webs that connect the mounting plate to the frame. The webs are configured and arranged so that the mounting plate can pivotally vibrate about a pivot axis, and translationally vibrate in the plane of the mounting plate. A first vibration transducer measures the pivoting vibration and a second vibration transducer measures the translational vibration. The pivot axis remains in the central plane of the mounting plate which coincides with the effective plane of the translational vibration measuring transducer.

Abstract: An unbalanced force sensing apparatus for sensing an unbalanced force produced due to rotation of a cylindrical rotor, the apparatus including a shaft having gas passageways to convey a first gas against the inner surface of the rotor to support the rotor away from the shaft, a second gas for flowing over the outer surface of the rotor to rotate the rotor, and a force sensing means for sensing an unbalanced produced due to rotation of the rotor around the shaft.

Abstract: A device for measuring forces generated by unbalance of a rotor, in particular a motor vehicle wheel, includes a stationary frame, an intermediate frame positioned radially within the stationary frame, and first levers supporting the intermediate frame on the stationary frame. The first levers are arranged along imaginary lines that are either parallel to each other or intersect at a first virtual mounting position. A pivot bearing is supported on the intermediate frame by second levers, which are arranged along imaginary lines that intersect at a second virtual mounting position. Mounted coaxially in the pivot bearing is a measuring shaft, which is rotatable about a common axis of the measuring shaft and the pivot bearing. An outer force sensor measures displacement between the intermediate frame and the stationary frame. An inner force sensor measures displacement between the pivot bearing and the intermediate frame.

Abstract: A machine for pre-adjusting and balancing a tool-holder, includes a support frame provided with a single rotary tool spindle, a column supporting a dimension-measuring arm, a console displaying the measurements and a protective hood preventing access to a risk area when the spindle is rotating.

Abstract: A measuring apparatus for the uniformity and/or the dynamic-balance of a tire is disclosed. The apparatus comprises a supporting member which is rotated with supporting a tested tire, a holding member which holds said supporting member with allowing to vibrate during rotation thereof and a regulating system which prevents the vibration of the supporting member during rotation thereof. The vibration of the supporting member is prevented by the regulating system for a uniformity measurement while it is allowed during a dynamic-balance measurement.

Abstract: A measuring apparatus for the uniformity and the dynamic-balance of a tire is disclosed. The apparatus comprises a supporting member which is rotated with supporting a tested tire, a holding member which holds said supporting member with allowing to vibrate during rotation thereof and a regulating system which prevents the vibration of the supporting member during rotation thereof. The vibration of the supporting member is prevented by the regulating system for a uniformity measurement while it is allowed during a dynamic-balance measurement.

Abstract: A machine for determining dynamically a residual unbalance in a workpiece having a conical surface is provided with a plurality of support elements, such as roller elements, that communicate with the workpiece at the conical surface thereof. The roller elements are arranged circumferentially equidistant about the workpiece and may have cylindrical or conical configurations. Further support elements, such as roller elements, can be applied against an annular surface of the workpiece, such as on a flange portion thereof. At least one of the support rollers that communicates with the conical surface is arranged to rotate about an adjustable axis of rotation that can be oriented with respect to the workpiece to achieve good rotative communication therebetween.

Abstract: An apparatus for unbalance measurement on a rotary member comprising a rotary mounting device for the rotary member and an oscillatable support for the rotary mounting device for supporting same on the foundation of the apparatus. A force and/or oscillation measuring equipment is operatively disposed between the foundation and the rotary mounting device for measuring centrifugal forces and/or oscillations which result from unbalance of the rotary member. To determine the mass of the rotary member in the rotary mounting device, the apparatus measures the force due to the weight of the rotary member, disposed in the path of transmission of force between the rotary mounting device and the foundation.

Abstract: A rotary element dynamic imbalance determining apparatus includes a spindle having a first end for removably supporting a rotary element the imbalance of which is to be determined, and a housing for rotatably mounting the spindle. An output signal related to imbalance in the supported rotary element is generated as the spindle rotates. A rotary fluid coupling comprises a chamber between the spindle and housing, a port in the housing for coupling the chamber to a source of compressed air and a one-way fluid seal for dividing the chamber into a first portion and a second portion. A passageway extends along the spindle from the second portion to the first end of the spindle to supply inflating air thereto.

Abstract: A wheel balancer comprises a main housing which supports a sub-housing. A main shaft to which a wheel to be balanced is coupled is rotatable in the sub-housing. The sub-housing is pivotally connected to the main housing by a pivot shaft which defines a horizontal main pivot axis extending transversely of the rotational axis of the main shaft. The sub-housing is pivotal from a horizontal position to a vertical position with the main shaft extending upwardly of the sub-housing to facilitate coupling of the wheel to the main shaft.

Abstract: A wheel balance measuring apparatus includes a frame, a hollow rim support shaft rotatably supported by the frame through a bearing, a lower rim mounted on the hollow rim support shaft, and an upper rim positioning above and confronting with the lower rim, so as to be shiftable along and rotatable about the vertical axis. A tested wheel is sandwiched between these upper and lower rims and is rotated together with the hollow rim support shaft for measuring dynamic balance of the tested wheel. The apparatus comprises a coupling shaft having an upper end connected integrally with the upper rim and a lower end formed with a plurality of engaging projections arrayed along an axial direction. This coupling shaft is inserted into or pulled out from the hollow rim support shaft. Claws are disposed inside the rim support shaft for selectively engaging with and disengaging from the engaging projections. A shift device shifts the claws between an engaging position and a disengaging position.

Abstract: A balancing station includes a vertical spindle having a collet for frictionally engaging the center hole of a wheel. A motor driven drum is mounted on an arm which is moved by an actuator to urge the drum against the wheel with a radial force so that it can frictionally drive the wheel. An idler drum or a second driven drum mounted on a similar arm on the opposite side of the wheel is moved by an actuator to engage the wheel at a location diametrically opposite the driven drum to apply a radial force to the wheel equal and opposite to the force from the driven drum. The arms are symmetrically mounted with respect to the spindle so that the two drums will contact diametrically opposite locations on the wheel for any size wheel over a large size range.

Abstract: An air-jet driven dynamic balance test apparatus for testing the dynamic balance of minrotors with minimum interference from external vibration noise. The dynamic balance test apparatus comprise a resilient supporting steel sheet having a horizontal bottom portion fastened to a base and an elongated upright body portion extended upwardly from the horizontal bottom portion to carry the sample to be tested. An air-jet generating device is provided to produce a continuous stream of compressed air for rotating the sample about its central axis. The resilient supporting steel sheet contains a resilient section for increasing sensitivity of said test apparatus. The resilient supporting steel sheet contains a resilient section, which can be the resilient steel sheet itself or in the form of a row of through holes or a corrugated section. A detector is mounted on the resilient supporting steel sheet to detect the vibration as the sample is being rotated during testing.

Abstract: A method and apparatus for dynamically balancing a rotating component, such as a compressor wheel, without using an arbor is disclosed. A balancing fixture includes a nest for receiving the compressor wheel and is defined by a balancing surface on the balancing fixture. The balancing fixture is attached to a fixed support by flexures which permit tilting motion of the balancing fixture. Compressed air is communicated into an air manifold within the fixture and is communicated to the balancing surface through pressure jets to thereby support and position the compressor wheel on a cushion of compressed air. Motion of the balancing fixture is transmitted through a bracket to a pair of spaced-apart motion transducers.

Abstract: A mounting stand in a balancing machine mounting assembly includes a stationary mounting block and a mount for a rotary member to be balanced. The mount is supported on the mounting block by two parallel springs capable of oscillating movement in a mounting plane in the measurement direction. The mounting stand further has at least one measurement value pick-up sensor operatively disposed between the mounting block and the oscillatable mount for detecting oscillation of the mount produced by an out-of-balance rotary member and to supply corresponding measurement signals. A rotatable adjusting unbalance weight of a known magnitude is mounted to the oscillatable mount and can be selectively brought into operation to cause oscillatory movement of the oscillatable system, to perform a calibration.

Abstract: A dynamic balancing system has a chamber (21) which surrounds a rotating object (3) which is equipped with protruding objects and which chamber rotates around the same shaft in order to move the air (20) surrounding the object (3) and to reduce the aerodynamic forces. This has application to the balancing of artificial satellites.

Abstract: A device for measuring rotor imbalance of a rotor is disclosed. The rotor shaft housing support for the shaft for a rotor to be balanced in a machine includes two pairs of springs disposed in two parallel planes. Each pair of springs consists of two parallel bar or rod springs that support the rotor shaft housing support in a plane of oscillation coincident with the shaft of the rotor on the machine stand in such a way that it oscillates. Each of the two bar or rod springs of each pair of springs forms part of a single-piece frame. Mounting strips are attached to the machine stand and to the rotor shaft housing.

Abstract: An unbalance measuring station (1) is disclosed toward which a rotor to be balanced is carried by a transport system (7). The station (1) contains an unbalance measurement unit (10) as well as devices (11, 12) for loading the rotor (6) into the unbalance measurement unit. The unit is essentially arranged above the plane of the path of movement of the transport system (7). The unbalance measuring station (1) is particularly suited for use in connection with transfer and assembly lines.

Abstract: Balancing an object with an irregular shape capable of generating substantial aerodynamic forces may be accomplished at atmospheric pressure by angularly oscillating the object about a vertical axis, measuring the horizontal reaction torques and forces, and calculating the imbalances in the object. Apparatus for such a method includes an object-supporting table, means for angularly oscillating the table relative to a cradle, and struts coupling the cradle to a base such that any imbalance in the object will result in reaction torques and forces being exerted by the cradle. Transducers detect these reaction torques and forces. A circuit processes the output of the transducers to provide signals representing those detected forces which are a component of a sinusoid at the frequency of oscillation that is in phase with the angular acceleration of the table. Such signals provide a measure of the imbalance of the object.

Abstract: A joystick controller of the electrically non-contact type is provided with a pair of magnetosensitive elements having a magnetresistive effect. The magnetosensitive elements are placed fixedly on a stator member in a given relation at right angles to detect the rotary motion of a permanent magnet embedded in a rotor member movably supported by the stator member. Each of the magnetosensitive elements is supplied by a constant bias magnetic field generated by added magnets on the stator member to improve the sensing characteristics of the controller. In addition, a spring sheet member is assembled between surfaces of the rotor and stator members to afford appropriate feeling and handling for operation of the lever.

Abstract: A drive shaft mounting assembly for dynamic wheel balancing machines includes force sensors supporting bearings at axially spaced positions of the shaft. The assembly further includes rods extending between the bearings in a manner absorbing the forces of run-out created at each bearing.

Abstract: The invention relates to a support system for hard bearing balancing machines for the support of rotational bodies for measuring the effects of imbalance on a mounting plate for the bodies by pickups.

Abstract: An apparatus for measuring the imbalance of a bowling ball includes a base, a first gimbal rotatably mounted on the base and a second gimbal rotatably mounted on the first. A ball is supported by the second gimbal and spun while having the same orientation it has when in flight. The ball acts as the rotor of a gyroscope and any imbalance causes precession in the form of rotation of the first gimbal. Indicators carried by the first gimbal and the base aid in observing the direction and rate of precession.

Abstract: A test stand for an internal combustion engine testing system is disclosed. The test stand permits the engine to substantially freely vibrate such that engine imbalance can be measured. The test stand includes a cradle and a support assembly, having a housing and an inflatable bladder member. The bladder member supports the cradle during the testing operation.

Abstract: The machine comprises a shaft mounted in a housing to rotate about a horizontal axis and arranged to carry the body of revolution in a concentric position. The shaft is also capable of oscillating in the housing about a vertical axis intersecting the horizontal axis near to an end of the shaft. An elongated indicator member is mounted in the axial extension of the shaft by a ball articulation. A measuring scale is mounted on the housing adjacent the free end of the indicator member. A deviating element is adapted, in the course of rotation of the shaft, to come momentarily in contact with the indicator member so as to deviate the indicator member relative to the scale to an extent which is a function of the magnitude of the unbalance of the body of revolution. An arrangement is combined with the ball articulation for ensuring the remanence of the deviation. The deviating element is in the form of a cam rotatable by a driving motor about an axis parallel to the axis of the shaft.