Abstract: Disclosed is a drive mechanism for driving a spin test rig, comprising a transmission casing (1) which accommodates a transmission gear unit (8) having a vertical output shaft (10) and an input shaft (9) coaxial therewith. The output shaft (10) has an upper end arranged in the transmission gear unit (8) and a lower end adapted to be coupled to a test object. The transmission casing (1) includes a casing lower part (4) detachable therefrom with the gear unit installed, in which casing part the output shaft (10) is axially and radially carried in bearings (28, 29) at a distance from its ends. The transmission gear unit (8) is configured such that the output shaft (10), together with the casing lower part (4) and the bearings arranged therein, is removable from the transmission casing (1).

Abstract: Disclosed is a mounting device (6) including a receiving opening (8) with a circular inner locating surface (10) which is coaxial with the axis of rotation (3) and serves for engagement with radially outer vertices (24) of the polygon profile of a holding pin (23). Arranged adjacent to the inner locating surface is a positioning disk (14) which has an opening (15) coaxial with the axis of rotation (3) and of such polygonal shape and size that the polygon profile of the holding pin (23) engaging in the opening (15) is supported in the opening (15) in a manner preventing relative rotation.

Abstract: Disclosed is a clamping device of a balancing machine for coaxially clamping a toolholder on a spindle rotary about an axis of rotation (3), in which the coupling shank (8) is supported in the receiving socket only on discrete supports (11-15) which are spaced from each other circumferentially and lie in three relatively spaced engagement planes (E1, E2, E3) intersecting the axis of rotation (3). Four rigid discrete supports (11-14) are arranged in pairs in the first (E1) and the second (E2) engagement plane and combine to form a rigid support in a first radial direction. Formed in the third engagement plane (E3) lying between the first and the second engagement plane is a fifth discrete support (15) which effects a supporting function in a second radial direction opposite the first radial direction.

Abstract: A drive shaft balancing machine for dynamic balancing of drive shafts includes two pedestals. Each pedestal includes a spring-mounted upper part receiving a rotary spindle, a support receiving an end of a drive shaft to be balanced and a first vibration sensor detecting upper part vibrations resulting from an unbalance of the drive shaft and further involved forces in at least a first degree of freedom of motion normal to the spindle axis. On the upper part of at least one pedestal a second vibration sensor is mounted which detects the vibrations of the upper part in at least a second degree of freedom of motion. An evaluating circuit analyzes and links the vibration signals of the first and the second vibration sensors so that pitch vibration excitations of the upper part not caused by the unbalance of the drive shaft do not enter the drive shaft unbalance value computed.

Abstract: Disclosed is a drive mechanism for driving a spin test rig, comprising a transmission casing (1) which accommodates a transmission gear unit (8) having a vertical output shaft (10) and an input shaft (9) coaxial therewith. The output shaft (10) has an upper end arranged in the transmission gear unit (8) and a lower end adapted to be coupled to a test object. The transmission casing (1) includes a casing lower part (4) detachable therefrom with the gear unit installed, in which casing part the output shaft (10) is axially and radially carried in bearings (28, 29) at a distance from its ends. The transmission gear unit (8) is configured such that the output shaft (10), together with the casing lower part (4) and the bearings arranged therein, is removable from the transmission casing (1).

Abstract: In a method for driving a turbocharger with the aid of induction air which is fed to the turbine inlet, the compressed air which exits at the compressor outlet is guided into a turbine auxiliary inlet of the turbine, which turbine auxiliary inlet opens downstream of the turbine inlet into the turbine chamber at a point, at which the pressure in the driven state of the turbine is lower than the pressure of the air which is compressed by the turbocompressor.

Abstract: Disclosed is a mounting device (6) including a receiving opening (8) with a circular inner locating surface (10) which is coaxial with the axis of rotation (3) and serves for engagement with radially outer vertices (24) of the polygon profile of a holding pin (23). Arranged adjacent to the inner locating surface is a positioning disk (14) which has an opening (15) coaxial with the axis of rotation (3) and of such polygonal shape and size that the polygon profile of the holding pin (23) engaging in the opening (15) is supported in the opening (15) in a manner preventing relative rotation.

Abstract: Disclosed is a drive shaft balancing machine (10) for the dynamic balancing of drive shafts, comprising two pedestals (13), each pedestal including an upper part (17) mounted on springs (19, 20) and receiving a rotary spindle (21), a support for receiving an end of a drive shaft (W) to be balanced and a first vibration sensor (26) which detects vibrations of the upper part resulting from an unbalance of the drive shaft (W) as well as further involved forces in at least a first degree of freedom of motion normal to the spindle axis, wherein the upper part (17) of at least one pedestal (13) mounts a second vibration sensor (29) which detects the vibrations of the upper part in at least a second degree of freedom of motion, and wherein the vibration signals of the first and the second vibration sensor (26, 29) are fed to an evaluating circuit which analyzes the vibration signals and links them in such a way that pitch vibration excitations of the upper part (17), which are not caused by the unbalance of the driv

Abstract: Disclosed is a clamping device of a balancing machine for coaxially clamping a toolholder on a spindle rotary about an axis of rotation (3), in which the coupling shank (8) is supported in the receiving socket only on discrete supports (11-15) which are spaced from each other circumferentially and lie in three relatively spaced engagement planes (E1, E2, E3) intersecting the axis of rotation (3). Four rigid discrete supports (11-14) are arranged in pairs in the first (E1) and the second (E2) engagement plane and combine to form a rigid support in a first radial direction. Formed in the third engagement plane (E3) lying between the first and the second engagement plane is a fifth discrete support (15) which effects a supporting function in a second radial direction opposite the first radial direction.

Abstract: A clamping chuck (1) for radially clamping workpieces with a cylindrical outer clamping surface includes an annular base member (2) which has a hole (5), a shoulder (11), which projects inwards radially and forms a contact surface for the workpiece, an axially-extending hole face (10) and tabs (12) which project inwards radially. Arranged on the base member (2) is a clamping member which is divided into a plurality of substantially L-shaped clamping elements (21), which each include a clamping head (24) arranged in the hole and an actuating lever (27) which extends outwards radially from the clamping head (24). Each clamping head (24) includes, on the outer side thereof, at least one cam (25), which projects outwards radially, engages in a gap between the shoulder (11) and the tabs (12) and is supported radially by the hole face (10) and axially by at least one tab (12).

Abstract: A method is disclosed for the automatic detection and identification of errors in a balancing machine during operation, in which a rotor provided with an unbalance is rotatably mounted in a vibratory bearing in the balancing machine and is set in rotation by a drive, the rotational frequency of the rotating rotor and the vibrations stimulated by the rotor are measured and measurement signals which comprise the measured values of the rotational frequency and the vibrations are generated and delivered to an evaluation computer. The evaluation calculation is based on mathematical models of the dynamic properties of the balancing machine which describe stimulations of the machine structure due to the unbalance, in particular in the balancing planes, and/or due to the rotor geometry and/or due to the bearing and/or possible damage to the bearing.

Abstract: For compensating unbalance of vehicle wheels, adhesive weight elements (8) are positioned and pressed onto a determined compensation surface (17) on a wheel (7) using a balancing head (1) and a program-controlled handling device (9). The adhesive weight elements (8) in the form of an endless weight strand (5) are fed by a feed device (2) arranged on the balancing head (1) to a following roll-on roller (3) that presses the beginning of the endless weight strand (5) onto the beginning of the compensation surface (17) and thereafter rolls along thereon. A length cut-off device (4) is provided in or before the roll-on roller (3) and cuts-off the endless weight strand (5) of the adhesive weight elements (8) in a determined length.

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: A device for mounting rotors, in particular articulated shafts, in a balancing machine has a bearing frame and a frame upper part, which is mounted on the bearing frame so as to be able to oscillate via spring bars and includes a spindle for rotatable mounting of a rotor. The frame upper part is mounted on the bearing frame via groups of spring bars, the groups being arranged at a distance from the axis of rotation of the spindle and at a distance from one another, and the longitudinal axes of the spring bars forming the spring bar groups being oriented parallel to the axis of rotation of the spindle. The spring bars forming the spring bar groups 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 method is disclosed for the automatic detection and identification of errors in a balancing machine during operation, in which a rotor provided with an unbalance is rotatably mounted in a vibratory bearing in the balancing machine and is set in rotation by a drive, the rotational frequency of the rotating rotor and the vibrations stimulated by the rotor are measured and measurement signals which comprise the measured values of the rotational frequency and the vibrations are generated and delivered to an evaluation computer. The evaluation calculation is based on mathematical models of the dynamic properties of the balancing machine which describe stimulations of the machine structure due to the unbalance, in particular in the balancing planes, and/or due to the rotor geometry and/or due to the bearing and/or possible damage to the bearing.

Abstract: A device for the dynamic measurement of the imbalance of a turbo rotor, which is rotatably mounted in a housing portion (6), comprises a carrier device (3), with a spring element, on which the housing portion (6) can be fastened in such a way that it has at least two degrees of freedom for oscillating relative to the carrier device, a turbine housing (4) fastened to the carrier device (3) with a channel, which is configured to supply a drive fluid and for loading the turbo rotor with the drive fluid, a free space being provided between the turbine housing (4) and the housing portion (6), a measurement sensor for detecting the oscillations of the housing portion (6), an automatic coupling mechanism (9) with a movable holder, a connection part which is held ready by the holder and can be moved by the latter up to the housing portion (6) and at least one movable coupling element, by means of which the connection part (10) can be coupled to the housing portion (6), the coupling mechanism (9) being movable into a

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: A clamping chuck (1) for radially clamping workpieces with a cylindrical outer clamping surface includes an annular base member (2) which has a hole (5), a shoulder (11), which projects inwards radially and forms a contact surface for the workpiece, an axially-extending hole face (10) and tabs (12) which project inwards radially. Arranged on the base member (2) is a clamping member which is divided into a plurality of substantially L-shaped clamping elements (21), which each include a clamping head (24) arranged in the hole and an actuating lever (27) which extends outwards radially from the clamping head (24). Each clamping head (24) includes, on the outer side thereof, at least one cam (25), which projects outwards radially, engages in a gap between the shoulder (11) and the tabs (12) and is supported radially by the hole face (10) and axially by at least one tab (12).

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: The invention relates to a method and an apparatus for the unbalance compensation of vehicle wheels in which adhesive weight elements (8) are positioned on at least one determined compensation surface (17) within a disk wheel (7) and are there pressed-on, with a balancing head (1) and a program-controlled handling device (9). The invention is characterized in that the adhesive weight elements (8) in the form of an endless weight strand (5) are fed by a feed device (2) arranged on the balancing head (1) to a following roll-on roller (3). In that regard, the balancing head (1) is arranged stationarily or is connected by a frictional force transmitting connection with an execution arm (10) of the handling device (9), whereby a roll-on roller (3) of the balancing head (1) presses the beginning of the endless weight strand (5) onto the beginning of the compensation surface (17) and thereafter rolls along thereon.