Useful Assumptions for Design of Hydrodynamic Bearing

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written 5.7 years ago by

yashbeer ★ 11k

Useful Assumptions for Design of Hydrodynamic Bearing as given in table below:

Parameter	Assumption	PSG page no.
Angle of contact	Full bearing - $360^\circ$	7.36
L/D ratio	Square bearing - I	7.36
Side flow	Yes	7.36
Design criteria	Minimum friction or maximum load	7.36 - 7.30
Bearing pressure	Depends on application	7.31
Fit selection	Normal running clearance fit	3.4
Tolerances	Hole and shaft basis, $C_{min}= BLL-JUL, C_{max}= BUL-JLL$	3.7 - 3.9
Clearance	Average clearance	$\mathrm{Cav}=(\mathrm{Cmin}+\mathrm{Cmax}) / 2$
Oil selection	SAE oil with viscosity and temperature, $\Delta t_o=t_o - t_a$ $t_o \lt S A E$ oil temperature	7.41

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