te 58 high pressure rotary tribometer - … pressure compensated force transducer is mounted on the...
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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)