Overview
The Pressure Distribution in Journal Bearing apparatus allows detailed experimental measurement of the hydrodynamic oil film pressure at multiple circumferential and axial positions in a plain cylindrical bearing while supporting a radially applied load. Pressure tappings connected to a multi-tube manometer board reveal the pressure wedge formed by the rotating journal and its relationship to load, speed, and oil viscosity. Students plot 2D and 3D pressure maps, determine the angular extent of the pressure film, calculate load capacity from the integrated pressure profile, and compare with Reynolds equation solutions. The experiment is central to understanding why plain bearings can support large loads without surface contact despite the absence of rolling elements.
Specifications
| Journal diameter | 50 to 100 mm |
| L/D ratio | 0.5 to 1.5 |
| Speed range | 100 to 1500 RPM |
| Radial load | 0 to 3000 N |
| Pressure tappings | 12 to 24 circumferential |
| Manometer board | multi-tube oil manometer |
| Lubricant | SAE 30 oil |
| Power supply | 220V AC, 50 Hz |