hydro "static" bearings rely on the pressure of a pump to keep the parts separated...they will provide that part separation at zero surface speed differential, based solely on the pressure of the lubricant keeping the parts separate.
Hydro "dynamic" bearings use the relative motion of the two surfaces to be separated to create the high pressure between them.
Your oil pump is simply there to provide the oil to the bearing, which creates it's own separation pressure...the pressure of the oil in the hydrodynamic film can be any tens of times the oil supply pressure...in fact, the oil supply pressure local to the bearing can be sub-atmospheric, as the bearing will suck it's own oil from the galleries...like I said, the oil pump is the means of keeping oil to the bearings...not what keeps them separated.
Take a turbine bearing (have designed a few, and a few lubrication systems/mods)...
* there is a hydrostatic port at the 6:00 position, which is fed 3000psi oil to lift the shaft, and allow it to roll.
* There is an oil supply (usually at 9:00) where the oil is fed at 30psi, but goes -ve at speed as the low pressure area in the bearing sucks oil in)...it provides oil, in volume.
* At speed, the spinning shaft in the bearing creates it's own pressure. This is the oil "wedge" that we talk about. It's 150psi or thereabouts, and keeps the parts from touching.
Motor vehicle journal bearings are clearly hydrodynamic, as the pressure is oil supply only.
If you don't believe, then look where the oil gallery is on a main bearing, and where the applied 50psi or thereabouts is...it's not "lifting" the bearing off the shell, it's jamming them together if there's any hydrostatic forces at play.