METHOD OF BALANCING A GAS TURBINE ENGINE ROTOR

摘要

A method of balancing a gas turbine engine rotor, including axisymmetrically removing an annular portion of the balancing flange exceeding that required to provide the unbalance correction, and creating the unbalance correction by non-axisymmetrically removing material from the balancing flange. In one embodiment, the configuration of a theoretical notch in the balancing flange that would create the unbalance correction is determined. The unbalance correction is created by removing material from the balancing flange to create a protuberance protruding radially from a remainder of the balancing flange, the protuberance having a height corresponding to the depth of the theoretical notch, a circumferential width corresponding to the arc angle of the theoretical notch, and a circumferential position diametrically opposed to the circumferential position of the theoretical notch. A gas turbine engine rotor is also discussed.

主权项

1. A method of balancing a gas turbine engine rotor, the method comprising:
providing a rotor having a disc and a circumferential array of blades extending radially outwardly from the disc, the disc having a balancing flange integrally connected thereto, the balancing flange being annular; measuring an unbalance of the rotor; determining a corresponding unbalance correction necessary to correct at least part of the unbalance; determining a configuration of a theoretical notch in the balancing flange that would create the unbalance correction, the configuration of the theoretical notch including a depth of the theoretical notch defined along the radial direction, an arc angle spanning a circumferential width of the theoretical notch, and a circumferential position of the theoretical notch; and creating the unbalance correction by removing material from the balancing flange to create a protuberance protruding radially relative to a remainder of the balancing flange, the protuberance having a height defined along the radial direction, the height corresponding to the depth of the theoretical notch, the protuberance having a circumferential width spanned by the arc angle of the theoretical notch, the protuberance having a circumferential position diametrically opposed to the circumferential position of the theoretical notch.