TE 97 FRICTION AND WEAR DEMONSTRATOR

Keywords:

Description:

The TE 97 Friction and Wear Demonstrator is designed for introducing students of tribology to a range of phenomena including dry and lubricated sliding friction and wear, two and three body abrasion and stick-slip. The unit is capable of operating in pin on disc, crossed cylinder and in block on ring test configurations.

The unit is bench mounting and incorporates full COMPEND 2000 control and data acquisition resources, with test data recorded in Excel spreadsheet compatible file format. The unit comprises a motor and reduction gearbox, which carries the test disc spindle. Load is applied by means of a screw acting on an extension spring.

Instrumentation comprises a slotted opto switch and sixty tooth wheel for speed measurement, a force transducer for friction measurement, a force transducer for load measurement, two thermocouples for temperature measurements and a displacement transducer for wear sensing.

The test disc spindle incorporates an electrical slip ring, which, in conjunction with electrical insulation of the pin/block specimen carrier and a Lunn-Furey circuit, allows electrical contact resistance measurements to be made. Electrical insulation of the specimens also allows the possibility of electrochemical experiments (adhesion/corrosion or abrasion/corrosion) to be performed in conjunction with a suitable potentiostat.

A test bath with integral electrical resistance heater is provided to allow tests to be run with heated lubricant supply.

For three body abrasion tests, the unit is used in block on ring configuration with either dry abradant or abrasive slurry gravity fed into the contact between the block and the rotating disc.

Experiments:

Pin on Disc/Ball on Disc Configuration:

  • Dry friction and wear characteristics of materials and generation of wear maps.
  • Effects of load and speed on dry adhesive wear of materials.
  • Stick-slip phenomena in dry and lubricated contacts.
  • Effect of grit size on two-body abrasive wear using abrasive paper.
  • Adhesive wear of coatings.
  • Adhesive wear of self-lubricating materials and generation of transfer films.
  • Effects of load, speed and lubricant temperature on lubricated adhesive wear.
  • Influence of lubricant additive chemistry on the friction and wear of materials.

    Crossed Cylinder/Ball on Ring Configuration:

  • Dry friction and wear of materials and generation of wear maps.
  • Effects of load and speed on the wear of materials.
  • Transitions between mild and severe wear of metals.
  • Adhesive wear of self-lubricating materials and generation of transfer films.
  • Effects of load, speed and lubricant temperature on lubricated adhesive wear.
  • Influence of lubricant additives on wear including anti-wear and extreme pressure additives.

    Block on Ring Configuration:

  • Resistance of materials and coatings to dry three-body abrasion.
  • Resistance of materials and coatings to wet three-body abrasion.
  • Evaluation of coating thickness by micro-scale abrasion.
  • Effect of load and particle density on transition between three and two body abrasion with wet slurry abradant.

    Instrumentation and Control:

    Manually Controlled Parameters:

  • Applied Load

    Computer Controlled Parameters:

  • Motor Speed
  • Bath Temperature

    Data Logged Parameters:

  • Load
  • Friction Force
  • Wear Displacement
  • Electrical Contact Resistance
  • Temperature
  • Motor Speed

    Technical Specifications:

    Motor: d.c. motor with variable speed drive 50W at 4000 rpm
    Gearbox: reduction ratio 20:1
    Rotational Speed: 10 to 200 rpm
    Load Range: up to 50 N
    Friction Sensing Range: up to 50 N
    Lubricant Bath Heater: ambient to 100°C
    Displacement Transducer: +/- 2 mm (5µm resolution)
    Thermocouples: k Type
    Lunn-Furey Voltage: 50 mV
    Pin on Disc/Ball on Disc Configuration:
    Disc Dimensions: 50 mm diameter x 10 mm thick (typ)
    Pin Dimensions: 4 mm diameter x 15 mm long
    Ball Diameter: 6 mm or 10 mm
    Stick/Slip Specimen: 10 mm diameters x 5 mm thick disc
    Equivalent Velocity: 20 to 420 mm/s at 20 mm track radius
    Track Radius: 10 to 20 mm
    Block on Ring Configuration:
    Disc Dimensions: 50 mm diameter x 10 mm thick (typ)
    Block Dimensions: 30 mm x 12 mm x 2 mm (typ)
    Crossed Cylinder/Ball on Ring Configuration:
    Disc Dimensions: 50 mm diameter x 10 mm thick (typ)
    Cylinder Dimensions: 10 mm diameter x 20 mm long (typ.)
    Ball Diameter: 6 mm and 10 mm

    Services:

    Electricity: Single phase a.c. 50/60 Hz
    PC and Printer: Minimum Specification

    Order As:

  • TE 97
    		• Friction and Wear Demonstrator
    Revised TE 97/10/02

    Copyright © 2002 Phoenix Tribology Ltd.