PT-1, PT-2, PT-3
PT-1, PT-2, PT-3 - vertical spindle rotational motion tribometers
The PT series test rigs PT-1, PT-2 and PT-3 were designed with the predestination for the determination of fundamental friction - wear characteristics of various bearing materials for both, sliding and rolling applications. Tested specimens support and loading systems are hydrostatic.
Schematic view of the PT-3 test rig (click sketch to enlarge):
- lower specimen
- upper specimen
- fiction torque transducer
- membrane spring
- journal of the spherical hydrostatic bearing
- cup of the spherical hydrostatic bearing
- plunger
- AC electric motor
- belt transmission
- hydrostatic thrust bearing
- spindle
- spindle rotational velocity transducer
- spindle radial hydrostatic bearings
- plunger radial hydrostatic bearings
- housing
Photo of test head:
Specifications:
- Maximum load: 10 kN
- Maximum spindle speed: 0 - 6000 rpm
- Various specimen arrangements e.g.:
- 4 - ball,
- ring on flat,
- cone on 3 - balls
- Controlled temperature of the test lubricant
Measured or calculated quantities:
- Friction force
- Temperature of specimens and/or lubricant
- Acceleration in friction induced vibratory motion (normal and tangential)
- Displacements of lower specimen (normal and tangential)
Examples of the research:
- Friction and wear of solid materials (metal alloys, plastics, ceramics or composite) proposed for different machine
elements in either lubricated or unlubricated contact
- Comparative tests of bearing or friction materials
- Comparative tests of lubricants
- The influence of lubricant on tribological processes
- Friction induced vibration
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