Hydrodynamic Bearing Apparatus

The experimental capability ranges from the measurement of friction torque under load, to determine the pressure distribution in a journal bearing, to plot a locus curve of a journal and to determine the bearing attitude for different conditions of load and speed. The behaviour of a classical journal bearing with hydrodynamic lubrication can be investigated with the apparatus. The radial load of max. 500N is adjusted manually with a hand wheel. The drive is an asynchronous motor with frequency converter.  Five different journals are used to examine bearing clearance. X and Y positions are measured using inductive displacement sensors. All variables (speed, load, friction torque, oil supply pressure, oil peak pressure, oil temperature, X-displacement, Y-displacement) are indicated on 4-digit displays. The friction torque is measured by means of a lever arm equipped with an electronic force sensor.

Determination of friction torque with strain gauge force sensor and lever arm
Electronic sensors and digital displays for: speed, oil temperature, oil pressure (supply and peak), friction torque, displacement in X- and Y-direction
Journal of a shaft: nominal diameter 50mm, width of bearing shell: 20mm
Mobile unit to investigate friction in a hydrodynamically lubricated journal bearing
Max. radial bearing load: 500N
Drive motor: 0.37kW, max. 1500rpm.