What are the implications of limiting P and PV for non full liquid sliding bearings, please?
Design of non liquid friction sliding bearingMost of the actual bearing in mixed lubrication (boundary lubrication and liquid lubrication exist at the same time, the state) reliable working conditions is to maintain the boundary of oil film is not damaged, in order to reduce the heat and wear (calculated according to criterion), the mechanical strength and rupture of the boundary film temperature to determine the bearing capacity.
The limit of P can also prevent the deformation of the bearing bush from being too large, resulting in the rupture of the oil film.Mpa (13-1)[p] - allowable relative pressure Mpa, table 2 related to bearing materialD, L - journal diameter and width (mm)2, limit the PV value of the bearingPV -- reflecting the consumption and heat friction per unit area, higher PV, bearing temperature rise high, easily lead to rupture of the boundary filmObjective: PV is the limit frequency, control the temperature of bearings, avoid rupture boundary film.
But the influence factors of the boundary film is very complex, the simplified calculation formula of conditional.Radial sliding bearing1, limiting average specific pressure PObjective: to avoid the excessive extrusion of the lubricating oil under the action of loading, and to limit the excessive wear of the bearing.
