DescriptionThe DN 55 High Temperature Dry Sliding & Fretting Machine comprises a special short
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The STD-DN 55 High Temperature Dry Sliding & Fretting Machine comprises a special short stroke, minimum trapped oil volume, servo hydraulic actuator, mounted vertically on a massive cast iron base. The actuator incorporates hydrostatic bearings, which, in combination with the minimized oil volume, allows high frequency and short stroke operation.
The test assembly is located vertically above the actuator and comprises two fixed specimen arms supported on flexural pivot bearings, which are in turn mounted on linear flexure assemblies. Motion in a vertical direction is restrained by piezo force transducers. As each arm reacts against its own independent transducer, the friction between the each moving specimen and each fixed specimen is monitored independently. This allows two different material pairs to be tested simultaneously under identical conditions of load and temperature.
| Type of contact: | Ball/Flat |
| Flat/Flat | |
| Line/Flat | |
| Maximum Specimen Diameter: | 20 mm |
| Type of Movement: | Sine, Square, Triangular and Random |
| Maximum Load: | 2000 N |
| Maximum Friction Force: | +/-2000N |
| Stroke – continuously variable: | 10 microns to 20 mm |
| Frequency: | 0.1 Hz to 200 Hz |
| Environment: | Dry |
| Temperature: | Ambient to 1200°C |
| Super High Response Servo Valve: | 12 l/min |
| Actuator Bearings: | Hydrostatic |
| Dynamic Load: | 5.7 kN |
| Static Load: | 8.6 kN |
| Hydraulic Power Pack: | 12 l/min at 250 bar |
| High Speed Interface: | PCI bus |
| Resolution: | 16 bit |
| Number of Input Channels: | 1 to 16 |
| Maximum Data Rate: | One channel at 250 kHz |
| Interface: | Serial Link Interface Module |
| Software: | COMPEND 2000 |
| DN 55/1 Small Perturbation Signal Generator | |
| Type of Movement: | Sinusoidal sliding stroke with co-linear superimposed sinusoidal perturbation |
| Sliding Motion: | |
| Maximum Stroke: | 20 mm (Amplitude: 10 mm) |
| Type of Movement: | Sinusoidal |
| Frequency (FS): | 0 to 5 Hz |
| Vibration Motion: | |
| Stroke/Frequency: | 200 microns (Amplitude 100 microns) @ 0 to 200 Hz |
| 100 microns (Amplitude 50 microns) @ 0 to 300 Hz | |
| Frequency (FP): | 0 – 300 Hz |
| Control Requirements: | FP must be greater than FS x 20 |
| Controlled Parameters | Frequency |
| Stroke | |
| Load | |
| Temperature | |
| Test Duration | |
| Measured Parameters | Frequency |
| Stroke | |
| Load | |
| Friction | |
| Temperature | |
| Services | |
| Electricity: | 220/240V, single phase, 50 Hz, 7.5 kW |
| 110/120 V, single phase, 60 Hz, 7.5 kW | |
| Mains water and drain: | 10 l/min (typical) |
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