investigation of bending vibrations in rotors
- Critical speed and resonance are phenomena that play essential roles in many machines and systems.
- In particular, resonance states with impermissibly high vibration amplitudes can occur in rotating shafts and rotors at certain speeds, which in some cases can even lead to destruction of the machine.
- To prevent this, the system is operated well above or below the critical speed and driven quickly through the critical speed range.
- Therefore, knowledge of critical speeds and vibration modes is important in the design and operation of machines with bending elasticity in their rotors.
- The TM 620experimental unit can be used to clearly demonstrate phenomena such as resonance, self-centring and vibration modes.
- The model-like structure of the experimental rotor as a thin, elastic shaft with rigid mass disks allows simple theoretical comprehension of the vibration phenomena that occur.
- The influence of different parameters can be studied thanks to the free choice of bearing and disk arrangement. The limitation of the amplitudes at a rapid resonant cycle can also be demonstrated.
- A three-phase motor drives a rotor shaft, onto which one or two masses may be fixed at various distances.
- The rotor shaft is mounted in two self-aligning ball bearings and connected to the motor via a flexible coupling.
- The electronically controlled speed can be selected via two potentiometers and is continuously variable. It is displayed on a digital display.
- The positions of and distances to elements fixed onto the rotor shaft can be read on a scale mounted in parallel with the rotor.
- A transparent protective cover and safety bearings immediately next to the masses ensure safe operation.
- The measured values can be displayed and analysed on a PC using the optional TM 620.20unit for data acquisition.
- investigation of bending vibrations and resonance in rotors
- 2 self-aligning ball bearings to support the rotor shaft, positionable at any point
- 2 masses to be secured at any point
- safety bearing and transparent protective cover for safe operation
- three-phase motor: 2 pre-selectable speed ranges; speed electronically controlled and continuously adjustable
- digital speed display
- system for data acquisition (TM 620.20) available as an option
- Three-phase motor
- power: 0,25kW
- speed: 3000min-1
- Rotor shaft
- Ø 6mm
- high tensile steel
- Mass 2x, disk-shaped
- 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…3000min-1
- scale for measuring distance: 0…500mm
- 230V, 50Hz, 1 phase
- 230V, 60Hz, 1 phase; 120V, 60Hz, 1 phase
- UL/CSA optional
Dimensions & Weight:
- L x W x H: 1150x390x375mm
- Weight: approx. 49kg
- 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-centering effect
Scope of Delivery:
- 1 experimental unit
- 1 set of instructional material
- investigation of bending vibrations in rotors
- determine critical speeds
- positions of rotor bearing and rotating mass can be adjusted
Due to the continuous development of our products, the goods supplied may vary in detail to that illustrated on this Website.