A method for balancing rotating machinery, such as gas turbine engines, to minimize vibrations. The method involves operation of the engine for a period of time at varying power levels and ranges of other operational parameters representative of the system operating envelope to obtain vibration data (amplitude and phase) for the full range of dynamic responses of interest. This usually includes time at elevated power settings until the engine reaches thermal stability, altitude variation, etc. as well as the full engine operating range. The full set of vibration data measured during the engine run is analyzed to generate unique unbalance states. The unique unbalance states are then analyzed and the mean unbalance state is identified. Balancing masses can then be installed or removed in accordance with a balance solution that is equal and opposite to the mean unbalance state.

A method dynamically balances a rotational body. First, the rotational body is set into rotation and then an imbalance of the rotational body is determined. According to the determined imbalance, material of the rotational body is removed and/or additional material is applied to the rotational body. The removal and/or the application is carried out by a laser beam of a laser.

A method dynamically balances a rotational body. First, the rotational body is set into rotation and then an imbalance of the rotational body is determined. According to the determined imbalance, material of the rotational body is removed and/or additional material is applied to the rotational body. The removal and/or the application is carried out by a laser beam of a laser.

A rotary body dynamic balance detection and correction device, comprising a detection assembly and a machining correction assembly. The detection assembly is configured to detect the amount of unbalance of a rotary body. The machining correction assembly is configured to machine an outer peripheral face of the rotary body to form a correction hole, so that the value of the amount of unbalance of the machined rotary body does not exceed the value of a preset maximum amount of unbalance. The rotary body dynamic balance detection and correction device can effectively correct the amount of unbalance of the rotary body, reduce the degree of unbalance of the rotary body, and avoid excessive lateral vibration generated when the rotary body rotates at a high speed. A rotary body dynamic balance detection and correction method and a numerical control tool holder are also provided.

A rotary body dynamic balance detection and correction device, comprising a detection assembly and a machining correction assembly. The detection assembly is configured to detect the amount of unbalance of a rotary body. The machining correction assembly is configured to machine an outer peripheral face of the rotary body to form a correction hole, so that the value of the amount of unbalance of the machined rotary body does not exceed the value of a preset maximum amount of unbalance. The rotary body dynamic balance detection and correction device can effectively correct the amount of unbalance of the rotary body, reduce the degree of unbalance of the rotary body, and avoid excessive lateral vibration generated when the rotary body rotates at a high speed. A rotary body dynamic balance detection and correction method and a numerical control tool holder are also provided.

A method for balancing disc blades comprising the steps of: determining the initial position of the center of mass of the disc blade to be balanced with respect to its main axis; calculating/determining the number, the position and/or the dimensions of one or more balancing holes eccentric with respect to said main axis and necessary for removing an amount of material sufficient to bring the center of mass of the disc blade at a distance from the main axis lower than a predetermined maximum limit value; and forming said balancing hole or holes on the central disc in an eccentric position with respect to said main axis. The method improves the producibility of disc blades.

A method for balancing disc blades comprising the steps of: determining the initial position of the center of mass of the disc blade to be balanced with respect to its main axis; calculating/determining the number, the position and/or the dimensions of one or more balancing holes eccentric with respect to said main axis and necessary for removing an amount of material sufficient to bring the center of mass of the disc blade at a distance from the main axis lower than a predetermined maximum limit value; and forming said balancing hole or holes on the central disc in an eccentric position with respect to said main axis. The method improves the producibility of disc blades.

A single-body balance correction range in which a weight has been removed by single-body balance correction performed on a turbine wheel (a rotor) as a single body is calculated, an assembly balance correction range is calculated in an assembled state of the turbine wheel, and assembly balance correction is performed in a case where the single-body balance correction range and the assembly balance correction range overlap each other, such that an outermost diameter of an arc-shaped assembly-balance correction groove provided by removal of an inner part of a turbine wheel head is smaller than a remaining height a of the single-body balance correction range.

A single-body balance correction range in which a weight has been removed by single-body balance correction performed on a turbine wheel (a rotor) as a single body is calculated, an assembly balance correction range is calculated in an assembled state of the turbine wheel, and assembly balance correction is performed in a case where the single-body balance correction range and the assembly balance correction range overlap each other, such that an outermost diameter of an arc-shaped assembly-balance correction groove provided by removal of an inner part of a turbine wheel head is smaller than a remaining height a of the single-body balance correction range.

A balancing method for a rotating part device including a nut having an internal thread, and a countersunk collar is disclosed. The countersunk collar has a through-hole with a diameter greater than the diameter of the internal thread of the nut. The countersunk collar includes a balancing weight.