Critical Speed Investigation Training System
(DN - 015)

1 Safety cover 2 Circuit breaker 3 Digital display of rotation speed (rpm). 4 Main trainer ON/OFF switch. 5 Electrical motor ON/OFF switch. 6 Emergency switch. 7 Speed control knob. 8 Shaft.

  • Investigation of critical speeds using different masses on the rotor shaft.
  • Comparison between the theoretical and actual critical speed.
  • Investigation of bending vibration
  • Investigation of resonance.
  • Investigation of the effect of mass on critical speed.
  • Spindle
    • Supply: Three-phase, 380 V
    • Speed: 6000 rpm
    • Power: 3 hp
  • Shaft 1
    • Diameter: 3 mm
    • Length: 90 Cm
    • Material of construction: Steel
    • Modulus of elasticity: 195-215 GPa
    • Mass: 400 grams
  • Shaft 2
    • Diameter: 4 mm
    • Length: 90 Cm
    • Material of construction: Steel
    • Modulus of elasticity: 195-215 GPa
    • Mass: 400 grams
  • Shaft 3
    • Diameter: 6 mm
    • Length: 90 Cm
    • Material of construction: Steel
    • Modulus of elasticity: 195-215 GPa
    • Mass: 1000 grams
  • Critical speed investigation training system (DN - 015)
  • Hard Copy user manual

The critical speed investigation training system is a benchtop educational unit that allows a clear representation of machine dynamics. The apparatus can perform basic experiments as bending oscillation and resonance on a rotating shaft at various speeds. Within this training system, trainees will get introduced the vibration phenomena and how various setups and factors can affect the critical speed.

                                     
  • The training system elaborates several aspects regarding machine dynamics field such as critical speed and its relation to masses, bending vibration, and resonance.
  • The training unit comprises an experimental section as well as control panel section.
  • The experimental section consists of shaft that is driven by a spindle which can rotate to up to 6000 rpm.
  • Three different shafts are available which can be switched in order to investigate the influence of shaft diameter on critical speed.
  • Masses are provided with the training system which can be mounted to the shaft so that trainees can investigate its effect and relationship to critical speed.
  • The experimental section is supplied with a safety cover in order to provide a safe work place to users when the shaft is rotated.
  • The safety cover is clear to facilitate the observation of formed modes during the experiments.
  • The control panel is supplied with motor speed display as well as control knob in order to alter motor speed.
  • The training control panel is supplied with main ON/OFF, circuit breaker and an emergency button in case of any inconvenience.
  • The unit is a bench-top system that is easy to comprehend and test by users.