Determination of critical speeds and investigation of natural modes of a shaft Features - investigation of the natural modes of various shafts with continuous mass distribution and of a Laval rotor - optimal visibility and simultaneous protection thanks to transparent protective cover Learning objectives/experiments - investigation of a Laval rotor -- critical speed -- self-alignment - natural modes on a shaft with continuous mass distribution with -- different bearing clearances -- different shaft diameters -- different shaft lengths Specification [1] experimental unit for determining critical speeds and investigating the natural modes of a shaft [2] 6 high-tensile steel shafts [3] up to 4 self-aligning ball bearings, each moveable to any point as a shaft bearing [4] 1 mass for constructing a Laval rotor [5] 3 safety bearings and transparent protective cover for safe operation [6] three-phase motor: 2 pre-selectable speed ranges; speed electronically controlled and continuously adjustable [7] digital speed display [8] system TM 620.20 for data acquisition available as an option Technical data 6 shafts - Ø 3mm, 6mm, 7mm - L: 600mm, 900mm - high-tensile steel Mass, disk-shaped - Ø 80mm - m: 965g - high-tensile steel Motor - power: 0,25kW - max. speed: 6000min-1 - speed electronically controlled Shaft bearing - 4x self-aligning ball bearings - 3x safety bearings Measuring ranges - speed: 0...6000min-1 - scale for clearance measurement: 0...1000mm 230V, 50Hz, 1 phase 230V, 60Hz, 1 phase; 120V, 60Hz, 1 phase UL/CSA optional LxWxH: 1550x380x450mm Weight: approx. 65kg
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