PG-2 1Ł

PG-2 1Ł - test rig for journal bearings

Test rig PG II 1Ł is used for determination of static characteristics of journal sliding bearings. The stand is computer controlled with internal feedback loop for input parameters adjustment and has a computerised data acquisition (high repeatability of test conditions and immunity to interference). Radial force and rotational speed can be changed according to a pre - programmed function. Bearings can be tested with oil or water lubrication (important for ceramic and composite bearings). The stand is equipped with an accurate friction force sensor. The tested bearing is fixed in a rigid housing, which is supported on hydrostatic bearing. Rotational speed is controlled by a vector type frequency inverter, which allows to test fully loaded bearings in start - up and stop conditions.

Schematic view of test head (click sketch to enlarge):

  1. tested bearing
  2. shaft
  3. support bearing housing
  4. hydraulic cylinder
  5. hydrostatic support
  6. AC motor
  7. friction force pick-up
  8. rotational speed transducer
  9. pressure sensor
  10. bearing temperature sensor
  1. temperature sensor
  2. friction force sensor (strain gage)
  3. temperature panel
  4. PC computer
  5. transducer
  6. Advantech PCL-812PG card
  7. friction force signal amplifier
  8. tilting pad set-up
  9. hydraulic oil supply

Photo of test head:


  • Radial load: up to 25 kN
  • Tilting torque: 0 - 5000 Nm
  • Rotational speed: 0 - 4000 rpm
  • Journal diameter of tested bearings: 30 - 110 mm

Measured or calculated quantities:

  • Friction force
  • Radial force
  • Temperature of sliding elements
  • Rotational speed
  • Tilting torque

Examples of the research:

  • Research of friction characteristics and load capacity of sliding journal bearing lubricated with oil or water. Energy efficiency of radial sliding bearings.

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