A pushing force exerted by one mass against another, which tends to produce motion.


Related Terms

NEEDLE BEAM

A temporary member thrust under a building or a foundation for use in underpinning.

JET ENGINE

Any engine that ejects a jet or stream of gas or fluid, obtaining all or most of its thrust by reaction to the ejection.

TAPERED-LAND THRUST BEARING

The babbitt face of a tapered-land thrust bearing has a series of fixed pads divided by radial slots. The leading edge of each sector is tapered, allowing an oil wedge to build up and carry the thrust between the collar and pad.

BALANCE PISTON

Reaction turbines have axial thrust because pressure on the entering side is greater than pressure on the leaving side of each stage. To counteract this force, steam is admitted to a dummy (balance) piston chamber at the low-pressure end of the rotor. Some designers also use a balance piston on impulse turbines that have a high thrust. Instead of piston, seal strips are also used to duplicate a piston's counter force.

THRUST-RADIAL BEARING

This unit has the ends of the babbitt bearing extended radially over the end of the shell. Collars on the rotor face these thrust pads, and the journal is supported in the bearing between the thrust collars.

BOW THRUSTERS

A propeller at the bow of the ship, used during maneuvering to provide transverse thrust

BASIC DYNAMIC LOAD RATING

The calculated constant radial load (thrust load for thrust bearings) which a group of identical bearings with stationary outer rings can theoretically endure for rating life of 1 million revolutions of inner ring.

AXIAL LOAD

A load exerted parallel to the axis of the shaft on which the bearing is mounted, also called thrust load.

SHOULDER

The side of a ball race, also a surface in a bearing application or shaft which axially positions a bearing and takes the thrust load.

THRUST FACE

A face of thrust bearing against which housing or shaft shoulder pushes.

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