The DN 22 is a bearing test rig for either plain or spherical journal bearings under high load and oscillating motion. A servo hydraulic ram provides quasi static (low cycle) controlled loading and oscillatory motion is provided by a semi-rotary servo hydraulic actuator. Displacement is controlled automatically, providing either continuous motion over a given stroke or movement to a selected position, followed by a pause, followed by either continuing motion in the same direction or movement in the opposite direction. The torque is measured by means of in-line torque transducers and wear is measured by LVDT.
Control and Data Acquisition
Control and data acquisition are implemented via host PC running COMPEND 2020 Windows compatible software, in conjunction with a Phoenix Tribology USB micro-controller interface. Automatic control is implemented via user programmable test sequences. Manual control is implemented using on screen toggles. Data is stored to hard disc in either .csv or .tsv file formats.
Maximum load: 120 kN Maximum Oscillating Frequency: 1 Hz Maximum Amplitude: +/-90 degrees Maximum Static Torque: 1,600 Nm Maximum Dynamic Torque: 1,000 Nm Loading: Servo hydraulic ram Load Profile: Quasi static (low cycle) control Load Feedback: Force transducer Motion: Semi-rotary hydraulic actuator with in-line torque transducer Motion Profile: Continuous oscillating motion or intermittent motion under positional control Wear measurement: LVDT Specimens: Plain bearings bore from 16 mm I/D to 80 mm I/D Interface: Serial Link Interface Module Software: COMPEND 2000 Controlled Parameters Speed Position Load Test Duration Measured Parameters Speed Load Specimen Temperature Friction Torque Wear Test Duration Services Electricity: 220/240V, single phase, 50 Hz, 7.5 kW 110/120 V, single phase, 60 Hz, 7.5 kW
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