A new novel sliding bearing—spiral oil wedge hydrodynamic bearing is investigated theoretically.The finite differential equation of Reynolds

film thickness and velocity in an oblique coordinate system are obtained.The Reynolds equation for spiral oil wedge hydrodynamic bearing is established

in which the pressure-viscosity effect is considered.By means of finite differential methods

static and dynamic of bearing under reckoning with and without pressure-viscosity effect are computed.The results show oil film thickness increases for considering pressure-viscosity effect

and pressure

loading capacity and end leakage decrease for considering pressure-viscosity effect.Pressure-viscosity effect produces different influence on dynamic stiffness and damping coefficients

stream distribution

frictional drag and temperature rise.So the pressure-viscosity effect is very important in the analysis of the static and dynamic characteristics of spiral oil wedge hydrodynamic bearing.