12 Sliding Bearings
Nomenclature
- B
- bearing width, m or mm
- C f
- coefficient of friction variable
- C p
- coefficient of load carrying capacity
- C Q
- coefficient of oil flow
- c
- specific heat, J/(kg °C)
- D
- bearing diameter, mm
- d
- journal diameter, mm
- e
- eccentricity, mm
- F
- force, N
- f
- coefficient of friction
- H
- frictional power rate, W
- H 1
- heat removed by oil flow per second, W
- H 2
- heat dissipated by housing per second, W
- h
- lubricant film thickness, μm
- h min
- minimum film thickness, μm
- h 0
- oil film thickness at the highest pressure, μm
- [h]
- allowable minimum film thickness, μm
- n
- rotational speed, rpm
- p
- unit bearing load, MPa
- [p]
- allowable pressure, MPa
- Q
- volumetric flow rate of lubricant, m3 s−1
- R
- radius of bearing, mm
- R z
- surface roughness, μm
- r
- radius of journal, mm
- S
- factor of safety
- t i
- oil temperature, °C
- t m
- mean temperature, °C
- t o
- outlet oil temperature, °C
- Δt
- temperature rise from inlet to outlet, °C
- u,v
- velocity, m/s
- α
- wrap angle, °
- α s
- heat transfer coefficient, W/(m2 °C)
- Δ
- diametrical clearance, mm
- δ
- radial clearance, mm
- ε
- eccentricity radio
- η
- dynamic viscosity, Pa s, N s m−2
- ρ
- lubricant density, kg m−3
- τ
- shear stress, MPa
- υ
- kinematic viscosity, m2 s−1 or cSt
- ϕ
- angular coordinate in circumferential ...
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