frictional moment under different bearing clearances and loads

Description:

• In hydrodynamic bearings, the shaft and the bearing shell are separated from each other during operation by a supporting lubricating film.
• The pressure in the lubricating film in hydrodynamic journal bearings is generated by the relative motion between bearing shell and shaft.
• The position of the shaft in relation to the speed and the load is important for an analysis of the tribological process in the bearing shell of a journal bearing.
• The TM 290trainer allows the study of a hydrodynamically lubricated radial journal bearing.
• Five shafts with different diameters allow the operating behaviour to be analysed as a function of the bearing clearance.
• The radial load on the journal bearing is applied by means of a handwheel and measured electronically.
• Similarly, the frictional moment is measured using a force sensor.
• The shaft is driven by a three-phase motor.
• The speed is continuously adjustable via a frequency converter and is displayed digitally.
• The oil temperature is adjusted using a controller.
• Inductive sensors detect the relative motion of the shaft in the bearing.
• This measurement makes it possible to plot a locus of the shaft as a function of load and speed.
• The position is measured, averaged and displayed at four points on the shaft in each of the X and Y directions.
• Oil temperature, oil pressure and oil peak pressure in the bearing are measured and displayed by additional sensors.
• The measured values are read from digital displays and can be transmitted simultaneously via USBdirectly to a PC where they can be analysed using the software included.

Technical Details:

Specifications:

• friction states in hydrodynamically lubricated journal bearing
• 5 shafts with different diameters for experiments with different bearing clearances
• shaft driven by three-phase motor with frequency converter for continuous adjustment of the speed
• controller to adjust the oil temperature
• radial load of the bearing by means of compression spring and threaded spindle with handwheel and measured via force sensor
• determine the frictional moment by means of lever arm with force sensor
• 8 inductive displacement sensors for measuring the displacement of the shaft
• digital displays for radial load, frictional moment, position of the shaft (X and Y direction), oil pressure, peak oil pressure, oil temperature and speed
• GUNT software for data acquisition via USB under Windows 8.1, 10

Technical Data:

• Journal bearing:
  • rated diameter of the shaft: 50mm
  • radial load: 0…1000N
  • bearing clearance: 0,12mm; 0,14mm; 0,16mm; 0,18mm; 0,28mm
• Drive motor with frequency converter:
  • power: 0,55Kw
  • speed: 0…1600min^-1
• Hydraulic unit to adjust the oil temperature:
  • flow rate: 1,4L/min, pressure: 2bar
  • tank capacity: 10L
• Measuring ranges:
  • frictional moment: 0…1Nm
  • radial load: 0…1000N
  • displacement in X direction: ±1,000mm
  • displacement in Y direction: ±1,000mm
  • oil pressure supply: 1x 0…10bar
  • oil pressure journal bearing: 1x 0…16bar
  • oil temperature: 0…100°C
  • speed: 0…1600min^-1
  • 230V, 50Hz, 1 phase
  • 230V, 60Hz, 1 phase; 120V, 60Hz, 1 phase
  • UL/CSA optional.

Dimensions & Weight:

• L x W x H: 1200x800x1450mm
• Weight: approx. 225kg

Required for Operation:

• PC with Windows recommended

Learning Objectives/Experiments:

• determine the coefficients of friction at various loads and speeds, compare with Stribeck curves
• influence of speed, bearing clearance and bearing load on the displacement of the shaft
• influence of speed, bearing clearance, bearing load and lubricant on the frictional moment
• locus of the shaft

Scope of Delivery:

• 1 trainer
• 1 set of tools
• 1 oil (5L)
• 1 GUNTsoftware + USB cable
• 1 set of instructional material

Features:

• frictional moment under different bearing clearances and loads
• pressure distribution in the journal bearing
• locus of the shaft under different loads and speeds

Due to the continuous development of our products, the goods supplied may vary in detail to that illustrated on this Website.