Table 4 Bearing geometry, MR fluid characteristics, and operating parameters.
From: Thermohydrodynamic analysis of magnetorheological conical bearings with conjugated heat transfer
Parameter | Notation | Values |
|---|---|---|
Density | (ρ) | 3.64 g/cm3 |
Clearance | (C) | 50.2 μm |
Bearing major radius | (\({R}_{b}\)) | 25 mm |
Journal major radius | (\({R}_{j}\)) | \({{{R}}}_{{{b}}}-{{C}}\) |
Aspect ratio | (\(\lambda ={L}_{b}/D\)) | \(1/4\), \(1/2\), 1, 2 |
Bearing length | \({(L}_{b}\)) | λ \(\times\) D |
Journal length | \({(L}_{j})\) | 3 \(\times {\rm L}_{b}\) |
Eccentricity ratio | (ε) | 0.4–0.9 |
Journal speed | (ω) | 40, 60, 80,120 rpm |
Cone angle | (α) | 5 \(^\circ\), 10 \(^\circ\), 15 \(^\circ\) |
Solenoid length | (Ls) | λ \(\times\) D |
Convective heat transfer coeff | h | 8 W/(m2.K) |
Conduction heat transfer coeff | Ksteel | 25 W/(m.K) |
Solid specific heat | Cp, steel | 460 J/(kg.K) |
