A device for detecting the balance of a hub valve hole that includes a hub conveying roller bed configured to sequentially convey a hub from an upstream of a conveying belt to a hub identification device and a valve hole balance detection device until the hub leaves the valve hole balance detection device, wherein the hub identification device includes an electronic belt scale configured to obtain the weight of the hub and an industrial camera configured to take a photo of a wheel disc of the hub when the hub is conveyed to the hub identification device. The device can accurately identify the hub type and then automatically complete the valve hole compensation function of balance detection through the combination of the above components, program control and an algorithm, thereby improving the automation level and reducing the repeated operation of an operator.

A dynamic balancing test and correction apparatus capable of shortening the time required for correcting imbalance in a correction part and improving the entire workflow of the apparatus.

A dynamic balancing test and correction apparatus capable of shortening the time required for correcting imbalance in a correction part and improving the entire workflow of the apparatus.

A method of forming a balancing scallop within a rotating part, including inspecting the rotating part for imbalance, calculating dimensions of the balancing scallop to be formed within the rotating part, positioning the rotating part relative to a material removal machine, starting the tool removal machine, bringing the rotating part and a tool of the material removal machine into engagement, forming a first section of the balancing scallop, forming a second section of the balancing scallop, forming a third section of the balancing scallop, and dis-engaging the rotating part and the tool of the material removal machine.

A method of forming a balancing scallop within a rotating part, including inspecting the rotating part for imbalance, calculating dimensions of the balancing scallop to be formed within the rotating part, positioning the rotating part relative to a material removal machine, starting the tool removal machine, bringing the rotating part and a tool of the material removal machine into engagement, forming a first section of the balancing scallop, forming a second section of the balancing scallop, forming a third section of the balancing scallop, and dis-engaging the rotating part and the tool of the material removal machine.

A rotor disk for an exhaust turbocharger is mounted in a housing of the exhaust turbocharger able to rotate about an axis of rotation. The rotor disk has a disk hub comprising a disk back and a disk front remote from the disk back. A plurality of rotor disk blades are formed on the disk hub in a manner extending between the disk back and the disk front. A balancing mark is arranged in a blade channel formed between a first blade of the plurality of rotor disk blades and a second blade, arranged adjacent to the first blade, of the plurality of rotor disk blades. A width of the balancing mark is less than a length of the balancing mark. The disclosure also relates to an exhaust turbocharger comprising such a rotor disk and to a method for balancing a rotor assembly for such an exhaust turbocharger.

A method, apparatus, and system for correcting unbalance of a turbocharger component relative to an axis of rotation of the turbocharger component. The method includes determining one or more unbalance characteristics for the turbocharger component, determining parameters for a first correction operation to be performed in a first correction plane, and moving the turbocharger component to align a first correction area of the turbocharger component with respect to a first water jet cutter and performing the first correction operation using the first water jet cutter. The method may include determining parameters for a second correction operation to be performed in a second correction plane and moving the turbocharger component to align a second correction area of the turbocharger component with respect to a second water jet cutter and performing the second correction operation using the second water jet cutter.

A method, apparatus, and system for correcting unbalance of a turbocharger component relative to an axis of rotation of the turbocharger component. The method includes determining one or more unbalance characteristics for the turbocharger component, determining parameters for a first correction operation to be performed in a first correction plane, and moving the turbocharger component to align a first correction area of the turbocharger component with respect to a first water jet cutter and performing the first correction operation using the first water jet cutter. The method may include determining parameters for a second correction operation to be performed in a second correction plane and moving the turbocharger component to align a second correction area of the turbocharger component with respect to a second water jet cutter and performing the second correction operation using the second water jet cutter.

A procedure defining a balancing strategy includes: providing a computer model which predicts the vibration amplitude at a given axial position along the spool when the spool is rotated at a given rotational speed; using the model to predict respective vibration amplitudes at the given axial position for different axial positions of a unit unbalance applied to the spool; plotting the predicted vibration amplitudes as data points on a graph of vibration amplitude against axial position of the applied unit unbalance; using the graph to identify axial positions which are more or less likely to contribute to flexing of the spool at the given rotational speed when mass is added or removed from the first rotor module to reduce imbalances at the axial positions; and defining a balancing strategy based on the identification.

A procedure defining a balancing strategy includes: providing a computer model which predicts the vibration amplitude at a given axial position along the spool when the spool is rotated at a given rotational speed; using the model to predict respective vibration amplitudes at the given axial position for different axial positions of a unit unbalance applied to the spool; plotting the predicted vibration amplitudes as data points on a graph of vibration amplitude against axial position of the applied unit unbalance; using the graph to identify axial positions which are more or less likely to contribute to flexing of the spool at the given rotational speed when mass is added or removed from the first rotor module to reduce imbalances at the axial positions; and defining a balancing strategy based on the identification.