| Popis: |
A dynamics analysis of a rolling piston, crank, vane and two misaligned journal bearings of a rotary compressor, as well as thermohydrodynamic (THD) lubrication analyses of the rolling piston and journal bearings, were carried out. Combined with the kinematics analyses of the crank, piston and vane, Reynolds equations in dynamic load condition and the transient energy equation of viscous fluid were derived and solved numerically. The distributions of the pressure and temperature rise of the oil film, as well as the motion mode between the piston and vane, were studied. Analysis results illustrate that the relative motion mode between the piston and vane tip is not always pure sliding but accompanies rolling. For the rolling piston, the wedge effect as well as the stretch and squeeze effect contribute greatly to hydrodynamic pressure, and there is a sharp peak in the temperature distribution, which are different from that of common journal bearings. |
