Current research projects

Image Performance tests of condensing units
Image Service offer for Leak Detection and Tightness Test
Image Range of services laboratory analyses
Image Corrosion inhibitor for ammonia absorption systems
Image Thermostatic Expansion Valves
Image Software for technical building equipment
Image Certifiable connection types in cryogenics
Image Combined building and system simulation
Image Tensile and compression testing
Image Measurements on ceiling mounted cooling systems
Image ZeroHeatPump
Image Ionocaloric cooling
Image Calibration of Low Temperature Sensors
Image Investigation according to DIN EN ISO 14903
Image Practical training, diploma, master, bachelor
Image High Capacity Pulse Tube Cooler

You are here:   /  Home


Low Temperature Tribology

Industry and R&D

Dipl.-Ing. Gunar Schroeder

+49-351-4081-5129

Tribological studies at cryogenic temperatures

For special applications at cryogenic temperatures the use of dry friction is necessary because the working temperatures are significant lower than the working range of liquid lubricants.

The ILK Dresden has extensive experience in the field of material testing at cryogenic temperatures and has developed a measuring system (from roomtemperature down to cryogenic temperatures) to determine the roughness and the coefficient of friction of different sliding material combinations.

The test stand consists of an experimental platform and a traversing mechanism with a force sensor, which is controlled via PC. The direct measurement of the friction force is carried out by the distance covered. Measurements can be performed down to −196 °C (lower temperatures on request). The cooling of the experimental platform and the samples is realised by a controlled liquid nitrogen heat exchanger/evaporator. Measurements are performed under an atmosphere of gaseous nitrogen to prevent the ingress of moisture. Thereby the experimental samples have no direct contact to liquid nitrogen. The uniform temperature distribution is measured by thermocouples, which are calibrated at the ILK Dresden.

Advantages: modular test setup which can be changed to specific requirements; adjustment of sample geometry and/or test track is possible.

Parameter

Measuring accuracyMeasuring range 0.4 N to 2 N≤ 1 % of measured value
Measuring range 2 N to 100 N≤ 0.5 % of measured value
Measuring range extendible up to 5 kN

Repeatability
(e.g. PTFE)

± 0.05 N respectively 1.5 % of coefficient of friction

Your Request

Further Projects

Image

Investigation of coolants

Secondary loop refrigerants

Image

Refrigerants, lubricants and mixtures

Determination of working fluid properties

Image

Reduction of primary noise sources of fans

...using numerical and experimental methods with contra-rotating axial fan

Image

Software for technical building equipment

Design cooling load and energetic annual simulation (VDI 2078, VDI 6007, VDI 6020)

Image

Measurements on ceiling mounted cooling systems

Comparative performance measurement