Research Article
Experimental and Numerical Investigation about Small Clearance Journal Bearings under Static Load Conditions
Table 3
Lubrication analysis data.
| | Parameter (unit) | Symbol | Value |
| | Viscosity (at T0 = 40°C) (Pa s) | μL0 | 0.0251 | | Viscosity temperature coefficient (1/°C) | β | 0.0317 | | Mass density (kg/m3) | ρL | 870 | | Specific heat (J/kg°C) | cL | 2000 | | Thermal conductivity (Wm/K) | kL | 0.14 |
| | Lubricant (ISO VG 32) properties | | Feed temperature (°C) | Ts | 51 | | Feed pressure (MPa) | ps | 0.069 |
| | Supply conditions | | Bearing load (half shaft weight) for original RK (N) | | 2.8 | | Bearing load (half shaft weight) for modified RK (N) | | 2.14 | | Environmental temperature (°C) | Te | 20 | | Rotation speed range (rpm) | ω | 250–3000 |
| | Working conditions | | Averaged bush temperature (°C) | TB | 51 | | Averaged journal temperature (°C) | TS | 40 | | Thermal conductivity of the bush (W/(m°C)) | k | 0.2 | | Thermal conductivity of the journal (W/(m°C)) | kj | 50 | | Heat transfer coefficient (W/(m2°C)) | h | 2 | | Young modulus (GPa) | E | 2 | | Poisson ratio | ν | 0.37 | | Linear dilatation coefficient (1/°C) | a | 7 10−5 | | Thermomechanical data |
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