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A clearance seal with no friction contact. Used on turbines as shaft seals.

Related Terms

BEARING

A support or guide by means of which a moving part such as a shaft or axle is positioned with respect to the other parts of a mechanism.

CAM

Eccentric shaft used in most internal combustion engines to open and close valves.

JOURNAL

That part of a shaft or axle that rotates or angularly oscillates in or against a bearing or about which a bearing rotates or angularly oscillates.

COUPLING

A straight connector for shafts or flow lines.

OIL RING

A loose ring, the inner surface of which rides a shaft or journal and dips into a reservoir of lubricant from which it carries the lubricant to the top of a bearing by its rotation with the shaft.

ANNULAR BEARING

Usually a rolling bearing of short cylindrical form supporting a shaft carrying a radial load.

FLOATING BEARING

A bearing designed or mounted to permit axial displacement between shaft and housing.

PIVOT BEARING

An axial load bearing, radial-load-type bearing which supports the end of a shaft or pivot.

THERMAL EFFICIENCY

Ratio of shaft work out of a system to the heat energy into the system.

BRAKE

An appliance used to stop rotation of unit's shaft or unit movement .
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