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: Modem rotary machine production requires built-in fault detection and diagnoses. The occurrence of faults, e.g. increased friction or loose bonds has to be detected as early as possible. Theses faults generate a nonlinear behavior. Therefore, a method for fault detection and diagnosis of a rotary machine is presented. Based on a rotor system model for the faulty and un-faulty case, subspace-based identification methods are used to compute singular values that are used as features for fault detection. The method is tested on an industrial rotor balancing machine.

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 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: In the case of an imbalance measuring device with a bearing device for static fluid bearing of the rotor (1), to improve the balance quality and to shorten the required time for balancing, it is proposed that the bearing device has at least two open, fluid-supplied bearing shells (11, 11?) to receive sections of the rotor periphery and at least one bearing plate (12, 12?) which is assigned to a rotor end surface and supplied with fluid. The drive is decoupled from the rotor (1) during the imbalance measuring process, and the measuring process preferably takes place during time-variable rotary behavior of the rotor (1).

Abstract: A device for mounting rotors, in particular articulated shafts, in a balancing machine has a bearing frame (10) and a frame upper part (11), which is mounted on the bearing frame so as to be able to oscillate via spring bars and includes a spindle (12) for rotatable mounting of a rotor. The frame upper part (11) is mounted on the bearing frame (10) via groups of spring bars (19, 19?), said groups (19, 19?) being arranged at a distance from the axis of rotation of the spindle (12) and at a distance from one another, and the longitudinal axes of the spring bars forming the spring bar groups (19, 19?) being oriented parallel to the axis of rotation of the spindle (12). The spring bars forming the spring bar groups (19, 19?) have an elongated, slender shape such that their rigidity in an axial direction is at least 100 times, in particular at least 300 times, greater than their radial flexural rigidity.

Abstract: A balancing station for positioning and holding a vehicle wheel for the attachment of a balance weight has a clamping device which has at least two mutually opposing jaws designed for pressing against the wheel periphery, the jaws being rotatably mounted around a common clamping axis. At least one jaw is rotatable and movable to and fro in the direction of the clamping axis via a drive. Via a conveyor device the vehicle wheel can be conveyed prone between the jaws of the clamping device. The clamping device can be moved into a tilted position wherein the clamping axis is inclined at an angle of at least 30 degrees from the horizontal out of a basic position wherein the clamping axis of the jaws is aligned substantially horizontally. In this way, weights can be applied particularly ergonomically to the inner face of the wheel.

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: A device for holding a constructional unit (40) of a double clutch in a balancing machine, wherein the constructional unit (40) comprises a clutch cage (41) to be balanced, with a pivot bearing (45) and driving disks (46, 47), and contains a bearing mandrel (1), which has a first clamping device (24) for clamping the pivot bearing (45) rotatably bearing the clutch cage (41) to be balanced and a second clamping device (11) for clamping the driving disk (47). One of the clamping devices (11) is adjustable in respect of the bearing mandrel (1) in the axial direction by means of an operating device (22). The bearing mandrel (1) additionally has a third clamping device (29, 57) for clamping the driving disk (46), which is stationary or adjustable in respect of the bearing mandrel (1) in the axial direction by means of an operating device (34).

Abstract: In a device for clamping the rim of a vehicle wheel, in particular for mounting tires, comprising a shelf (35), onto which the rim may be deposited by one side, and comprising clamping jaws (12 to 15), which may be moved radially relative to the rim, for clamping the rim edge adjacent to the shelf (35), two pairs of clamping jaws (12 to 15), of which the paths of movement intersect at right angles, are provided. The movement of the clamping jaws (12 to 15) is generated by a cylinder (22) and is synchronized by means of a gear unit (27).

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 an imbalance measuring device with a bearing device for static fluid bearing of the rotor (1), to improve the balance quality and to shorten the required time for balancing, it is proposed that the bearing device has at least two open, fluid-supplied bearing shells (11, 11?) to receive sections of the rotor periphery and at least one bearing plate (12, 12?) which is assigned to a rotor end surface and supplied with fluid. The drive is decoupled from the rotor (1) during the imbalance measuring process, and the measuring process preferably takes place during time-variable rotary behaviour of the rotor (1).

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 tit 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: A balancing station for positioning and holding a vehicle wheel (36) for the attachment of a balance weight has a clamping device (13) which has at least two mutually opposing jaws (23, 25) designed for pressing against the wheel periphery, said jaws being rotatably mounted around a common clamping axis. At least one jaw (25) is rotatable and movable to and fro in the direction of the clamping axis by means of a drive. By means of a conveyor device (6) the vehicle wheel (36) can be conveyed prone between the jaws (23, 25) of the clamping device (13). The clamping device (13) can be moved into a tilted position wherein the clamping axis is inclined at an angle of at least 30° from the horizontal out of a basic position wherein the clamping axis of the jaws (23, 25) is aligned substantially horizontally. By this means weights can be applied particularly ergonomically to the inner face of the wheel.

Abstract: In a device for clamping the rim of a vehicle wheel, in particular for mounting tires, comprising a shelf (35), onto which the rim may be deposited by one side, and comprising clamping jaws (12 to 15), which may be moved radially relative to the rim, for clamping the rim edge adjacent to the shelf (35), two pairs of clamping jaws (12 to 15), of which the paths of movement intersect at right angles, are provided. The movement of the clamping jaws (12 to 15) is generated by a cylinder (22) and is synchronized by means of a gear unit (27).

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: A test rotor for balancing machines has a plurality of receptacles for test weights. Fitting surfaces are provided beside the receptacles against which fitting surfaces of the test weights are placed. The fitting surfaces for angle positioning are shaped as level surfaces that run in the lengthwise direction of the rotor in order to inexpensively ensure a simple, precise and secure manner for positioning the test weights.

Abstract: A support structure with a vibration damper permits rotatably holding a rotatable body to be balanced, without applying undesirable constraining forces to the rotor or wheel. The vibration damper is an elastomeric element, for example a metal rubber composite element, inserted between the rotatable body and a support which itself is separately mounted by spring elastic mountings in a machine frame. The vibration damping element is effective between the rotatable body and the support if the element is inserted between a bearing and the rotatable body or if the element is inserted between the bearing and the support.

Abstract: A device for maintaining rotors centered during spin testing thereof includes a disc-like or sleeve-like centering element positioned between the exterior of a spin arbor and the interior of an axial bore hole extending through the rotor under test. Specifically designed circumferential areas on the centering elements are elastically deformable in a radial direction to maintain contact with the rotor even when the bore hole thereof slightly expands by the centrifugal forces generated during the spin test.