Abstract
Perpendicularity is an orientation tolerance, and the perpendicularity of end face can be utilized to assess the axial assembly precision of multistage rotor. The aim of this article is to detect the perpendicularity and parallelism of rotor using turntable-rotating approach. The misalignment between datum system of rotor and measurement datum of turntable will introduce the datum error, which is difficult to be thoroughly eliminated by the mechanical device of centering and leveling. To ensure that each measurement is carried out in the same datum system of rotor, the residual error of tilt and eccentricity between two datum systems is studied and compensated. The direction of assessment datum axis of rotor perpendicularity is determined by rotor axis rather than extrinsic measurement datum e.g. turntable axis. The experiment of rotor is performed to verify the effectiveness of the presented detection approach. The difference and relationship between rotor perpendicularity and parallelism are investigated and discussed. It is recommended that parallelism and perpendicularity should be considered together to fully reflect the axial geometric tolerance of rotor. The presented approach is general, which can also be conveniently utilized to detect axial geometric tolerances of other rotating components. For example, compressor rotor, motor rotor, gas turbine rotor, etc.
Published Version
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