Test Results and Analytical Predictions for MIL-STD-167 Vibration Testing of a Direct Drive Compressor Supported on AMB

Abstract

External vibration testing was performed on a semi-hermetic, direct drive compressor on magnetic bearings intended for US Navy Shipboard use. The compressor was placed on a US Navy MIL-STD-167 shaker platform and driven at sinusoidal frequencies from 4 to 33 Hz at graduated displacements equal to a maximum of 1.5Gs. During the machine design phase, a linear forced response analysis of the coupled rotordynamic system model of the rotor, housing and magnetic bearings was performed to predict rotor/housing displacements and actuator loads. The results were used to guide bearing sizing and control algorithm design. The measured rotor motion and actuator currents correlated well with predictions at all tested frequencies, amplitudes and orientations. Analysis methodology, test results, and comparisons are reported here.

Demonstrated Operability and Reliability Improvements for a Prototype High-Speed Rotary-Disc Atomizer Supported on Active Magnetic Bearings

“…A complete dynamic model of the rotor and AMBs was created using an internally-developed solver. The basic modeling approach used by the solver is described in Ref [6].…”