Hydrostatic thrust
bearing with central pocket 

Diameter bearing D0 
10^{3} m 
Diameter pocket D1 
10^{3} m 
Film thickness h0 
10^{3} m 
Supply pressure p_{s}p_{a} 
10^{5 }Pa 
Viscosity η 
Pa·s 
Density ρ 
kg/m^{3} 
Constriction coefficient orifice C_{D} 

Pressure factor ß_{0} 



Effective surface area A_{E }/A 

Dimensionless load F* 

Dimensionless stiffness S* 

Dimensionless flow Q* 

Reynolds number film Re=ρVh/η 

Reynolds number orifice Re=ρVd/η 

Diameter orifice d 
10^{3} m 
Load capacity
F

10^{3} N

Axial stiffness S 
10^{6} N/m

Flow rate
Q 
10^{3} m^{3}/s

Effective power consumption N 
10^{3} W

^{1)} Hydrostatic bearing of the Prins Willem Alexander Lock Gate in Amsterdam, NL
This bearings of the Oranje locks are equipped with 4 pockets each in order to obtain good self aligning properties ( Animation of pressure distribution
). An alternative is the hydrostatic bearing with one pocket at the
center. The load capacity of this bearing, with the diameter of the
central pocket the same as that of the 4 pockets is exactly the
same, however the self aligning capacity is inferior.
The self aligning capacity of the hydrostatic bearing with central
pocket can be increased significantly by minimizing the diameter of
the central pocket (
Pressure distribution
). The load capacity of the bearing with decreased pocket diameter
however becomes smaller. This can be compensated by selecting a
higher supply pressure or a larger bearing diameter.For custom bearings to be designed to your specifications, please contact
info@tribologyabc.com 

www.tribologyabc.com 