Kingsbury, Inc. has been the industry leader in the design and manufacture of tilting-pad bearings, also called pivoted-shoe bearings, since Dr. Albert Kingsbury invented them in 1912. Our expertise in the technology, operation and service of these tilt-pad bearings stretches back more than a century and has been continuously updated with new patented product developments.
The main types of tilting pad bearings are thrust and
journal bearings. These two types are
further divided into fixed profile (for thrust only), tilting-pad flooded
lubrication, and tilting-pad directed lubrication categories, based on designs
needed to meet higher performance challenges.
These bearings operate by providing a coating of oil between a rotating
component and the static bearing.
Directed lubrication is the current performance leader for
handling higher pressures of 2.76+ MPa, temperatures typically up to 135°C, and
speed requirements of over 14,000 RPM. The
groove in the LEG bearing, (an acronym for leading-edge groove) in the tilting
pad category provides the best oil circulation.
Additionally, these bearings typically have babbitted
working surfaces on the tilting pad consisting of a layer of softer metal like
tin alloys which act to protect the underlying surface and can easily be
replaced. In some cases, this babbitting material is a limiting factor to the
maximum performance and in other cases it is the integrity of the oil.