Page 258 - Practical Machinery Management for Process Plants Major Process Equipment Maintenance and Repair

240 Major Process Equipment Maintenance and Repair

Figure 6-17. Modified journal bearing half with pressure dam cut into bearing bore.

7. Tilting Pad Journal Bearing-Consists of several babbitted bearing
segments (jive is probably the most common number) that are free to
pivot in the circumferential direction. Is generally used for high speed
shaft stabiliw. (See Figure 6-18.)
8. Hydrostatic Journal Bearing-Uses oil pressure to lift the shaft so
that there is almost no weal: Loaded half has pressurized pockets to
generate oilfilm.
9. Flat Face Thrust Bearing-Similar in construction to the plain jour-
nal bearing except has flat babbitted face to absorb thrust. Will not
develop a hydrodynamic film on face. Can be used in all speed
ranges. (See Figure 6-19.)
10. Tilting Pad Thrust Bearing-Sometimes referred to by the trade
name Kingsbury. Has a number of babbitted tilting shoes to absorb
thrust. Can be designed with a .self-equalizing (load sharing) feature.
(See Figures 6-20 and 6-21.)
Roller bearings are almost always applied to lower speed applications.
However, they can be designed for extremely high speeds where rela-
tively light loads are involved.
Journal-type bearings are used for almost all applications, from rail-
road axles to extremely high speed turbines. They have infinite life if