Bending elasticity in rotors Investigation of bending vibrations and resonance of a rotating shaft Features - investigation of bending vibrations in rotors - determine critical speeds - positions of rotor bearing and rotating mass can be adjusted Learning objectives/experiments - investigate bending vibrations and resonance of a rotating shaft - determine critical speeds with different arrangements of the bearing and masses on the rotor shaft and compare with theory - investigation of the rotor's self-centring effect Specification [1] investigation of bending vibrations and resonance in rotors [2] 2 self-aligning ball bearings to support the rotor shaft, positionable at any point [3] 2 masses to be secured at any point [4] safety bearing and transparent protective cover for safe operation [5] three-phase motor: 2 pre-selectable speed ranges; speed electronically controlled and continuously adjustable [6] digital speed display [7] system for data acquisition (TM 620.20) available as an option Technical data Three-phase motor - power: 0,25kW - max. speed: 2800min-1 Rotor shaft - L=500mm - Ø 6mm - high tensile steel Mass 2x, disk-shaped - m=965g - Ø 80mm - hardened steel Rotor bearing - 2x self-aligning ball bearings - 2x safety bearings - safety bearing play: ±3mm - adjustable bearing clearance: 300...470mm Measuring ranges - speed: 300...2800min-1 - scale for measuring distance: 0...500mm 230V, 50Hz, 1 phase 230V, 60Hz, 1 phase; 120V, 60Hz, 1 phase UL/CSA optional LxWxH: 1150x390x375mm Weight: approx. 49kg