TE 58 HIGH PRESSURE ROTARY TRIBOMETER

Description

The TE 58 is a hermetically sealed high-pressure rotary tribometer, designed to operate at

pressures up to 15 MPa with conventional refrigerants or CO2 as the pressurizing gas/fluid.

The TE 58 has servo controlled loading with force transducer feedback, servo motor with

encoder feedback for speed control, SUPERSLIM Serial Link Interface Module and COMPEND

2000 Window compatible control and data acquisition software. The machine is floor-standing.

Motor and Test Spindle

The test spindle, which projects downwards, is fully enclosed within the pressure vessel and

incorporates hybrid bearings that run in the working atmosphere. The spindle is connected to

the drive motor via a magnetic drive coupling. Moving specimen tooling is attached to the lower

end of the spindle.

Load Application and Measurement

Load is applied by means of a servo controlled ball screw actuator, mounted beneath the

pressure vessel. A rod extension projects upwards into the vessel and is sealed by means of a

high pressure stainless steel bellows. The ball screw actuator thus has to have the capacity not

only to apply the required load within the vessel, but also to overcome the pressure forces

acting on the bellows.

A pressure compensated force transducer is mounted on the upper end of the rod extension,

within the pressure vessel. The transducer is connected to a spring-pack of Belleville washers.

As the rod is moved upwards and the specimens are brought into contact, the spring washers

are compressed, resulting in a load on the specimens; this is detected by the force transducer.

Fixed Specimen Assemblies and Friction Torque

Measurement

The fixed test assemblies are torque reaction mounted on top of the spring-pack assembly.

Friction torque is measured by means of a torque arm connected to a pressure compensated

force transducer.

Access to Test Assemblies

In order to gain access to the test assemblies, the chamber is split at its mid-point and the

upper half of the chamber then raised on pneumatic bellows. Standard ports are provided for

charging and scavenging the chamber.

Control and Data Acquisition

The TE 58 has PC based sequence programmable control and data acquisition. This is provided

by an integrated Serial Link Interface Module and COMPEND 2000 software running on a host

PC, operating under Windows. Data is stored to hard disc in standard spread sheet compatible

file formats (.csv or .tsv).

Tests are defined by a sequence of steps, each step containing set-point, data recording rates

and alarm level information. Set-points may be adjusted by step change or ramp. The test

sequence is followed unless interrupted by the operator or an alarm. Set-points may also be

adjusted manually using on screen toggles.

Test Adapters

Sliding Four Ball Assembly

Three Pin /Ball on Disc

Vane Pump Assembly

Thrust Washer Assembly

TE 58 HIGH PRESSURE ROTARY TRIBOMETER

Technical SpecificationsMaximum Torque: 10 NmMaximum Load: 5000 NMaximum Pressure: 15 MPaMaximum Speed: 2000 rpmMaximum Temperature: 120 CEnvironment: CO2, R407, R410Motion: Continuous slidingInterface: Serial Link Interface Module Software: COMPEND 2000

Controlled Parameters Rotational Speed

TemperatureLoadTest Duration

Recorded Parameters Rotational Speed

Friction TorqueTemperaturesNumber of RevolutionsTest DurationSliding SpeedFriction CoefficientSliding Distance

ServicesElectricity: 220/240V, single phase, 50 Hz, 5.5 kW

110/120 V, single phase, 60 Hz, 5.5 kWClean, dry air: 4 cfm at 8 bar (120 psi)